CN113357359B - Automatic gearbox gear shifting control method and device, electronic equipment and medium - Google Patents
Automatic gearbox gear shifting control method and device, electronic equipment and medium Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0213—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by the method for generating shift signals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0213—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by the method for generating shift signals
- F16H2061/0216—Calculation or estimation of post shift values for different gear ratios, e.g. by using engine performance tables
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0213—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by the method for generating shift signals
- F16H2061/0232—Selecting ratios for bringing engine into a particular state, e.g. for fast warming up or for reducing exhaust emissions
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Abstract
The application discloses a gear shifting control method, a gear shifting control device, electronic equipment and a medium of an automatic gearbox, which relate to the technical field of automotive electronics, and are characterized in that estimated basic parameter values of a vehicle in each adjacent gear of a current gear are determined according to operating parameter values of the vehicle in the current gear; determining an estimated exhaust emission value under each adjacent gear according to the estimated basic parameter value under each adjacent gear; determining a pre-recommended gear and a pre-recommended rotating speed of the vehicle according to the estimated exhaust emission value of each adjacent gear and the current exhaust emission value of the current gear; and if the pre-recommended rotating speed is within the rotating speed limit range of the vehicle, using the pre-recommended rotating speed as the recommended rotating speed and using the pre-recommended gear as the recommended gear. According to the method, the recommended gear and the recommended rotating speed are provided for the automatic gearbox based on the emission requirement of the engine, and the gear shifting of the automatic gearbox is optimally limited, so that the condition that the vehicle emission exceeds the standard when the automatic gearbox is shifted is reduced.
Description
Technical Field
The application relates to the technical field of automotive electronics, in particular to a gear shifting control method and device for an automatic transmission, electronic equipment and a medium.
Background
With the enhancement of environmental awareness, more and more environmental regulations are applied, and the emission requirements of vehicles are increasingly strict. The emission control strategy of the engine of the vehicle cannot ensure that all working points can meet the emission requirement.
In the related technology, the gear shifting strategy of the automatic gearbox matched with the whole vehicle is to perform automatic gear shifting based on the rotating speed of an engine, the opening degree of an accelerator pedal and the speed of the vehicle, the emission requirement of the engine cannot be completely adapted, and the emission of the vehicle is easily caused to exceed the standard.
Disclosure of Invention
The embodiment of the application provides a gear shifting control method and device for an automatic gearbox, electronic equipment and a medium, which can provide recommended gears and recommended rotating speeds for the automatic gearbox based on the emission requirement of an engine, so that the occurrence of the condition that vehicle emission exceeds the standard when the automatic gearbox shifts gears is reduced.
In a first aspect, an embodiment of the present application provides a shift control method for an automatic transmission, where the method includes:
determining estimated basic parameter values of a vehicle in each adjacent gear of the current gear according to the running parameter values of the vehicle in the current gear;
determining an estimated exhaust emission value under each adjacent gear according to the estimated basic parameter value under each adjacent gear;
determining a pre-recommended gear and a pre-recommended rotating speed of the vehicle according to the estimated exhaust emission value of each adjacent gear and the current exhaust emission value of the current gear; the pre-recommended gear is a gear corresponding to the minimum value of the estimated exhaust emission value and the current exhaust emission value under each adjacent gear;
and if the pre-recommended rotating speed is within the rotating speed limit range of the vehicle, using the pre-recommended rotating speed as the recommended rotating speed and using the pre-recommended gear as the recommended gear.
According to the method, estimated basic parameter values of a vehicle in each adjacent gear of a current gear are determined according to operation parameter values of the vehicle in the current gear; determining an estimated exhaust emission value under each adjacent gear according to the estimated basic parameter value under each adjacent gear; determining a pre-recommended gear and a pre-recommended rotating speed of the vehicle according to the estimated exhaust emission value of each adjacent gear and the current exhaust emission value of the current gear; and if the pre-recommended rotating speed is within the rotating speed limiting range of the vehicle, taking the pre-recommended rotating speed as the recommended rotating speed and taking the pre-recommended gear as the recommended gear. According to the method, a recommended gear and a recommended rotating speed are provided for the automatic gearbox according to the running parameter value of the vehicle in the current gear and based on the emission requirement of an engine, and the gear shifting of the automatic gearbox is optimally limited, so that the condition that the vehicle emission exceeds the standard when the automatic gearbox is shifted is reduced.
In a possible implementation manner, the estimated basic parameter values include an estimated rotation speed value, an estimated torque value and an estimated exhaust temperature value; the determining the estimated basic parameter values of the vehicle in each adjacent gear of the current gear according to the operation parameter values of the vehicle in the current gear comprises the following steps:
determining the estimated rotation speed value and the estimated torque value of the vehicle in each adjacent gear of the current gear according to the operation parameter value of the vehicle in the current gear;
and determining the estimated rotation speed value and the estimated exhaust temperature value corresponding to the estimated torque value under each adjacent gear according to a first corresponding relation of a preset rotation speed value, a preset torque value and an exhaust temperature value.
According to the method, the estimated rotation speed value and the estimated torque value of the vehicle in each adjacent gear of the current gear are determined, and the estimated exhaust temperature value corresponding to the estimated rotation speed value and the estimated torque value in each adjacent gear is determined according to the first corresponding relation of the preset rotation speed value, the preset torque value and the exhaust temperature value, so that the estimated rotation speed value, the estimated torque value and the estimated exhaust temperature value can be rapidly and accurately determined, the emission requirement based on an engine is met, the recommended gear and the recommended rotation speed are provided for the automatic transmission, the gear shifting of the automatic transmission is optimized and limited, and the occurrence of the condition that the vehicle emission exceeds the standard during the gear shifting of the automatic transmission is reduced.
In a possible implementation manner, the estimated basic parameter values include an estimated rotation speed value, an estimated torque value and an estimated exhaust temperature value; determining the estimated exhaust emission value under each adjacent gear according to the estimated basic parameter value under each adjacent gear, wherein the method comprises the following steps:
and determining the estimated rotation speed value, the estimated torque value and the estimated exhaust emission value corresponding to the estimated exhaust emission value under each adjacent gear according to a preset second corresponding relation of the exhaust temperature value, the rotation speed value, the torque value and the emission value.
According to the method, the estimated rotation speed value, the estimated torque value and the estimated exhaust emission value corresponding to the estimated exhaust temperature value under each adjacent gear are determined according to the preset second corresponding relation of the exhaust temperature value, the rotation speed value, the torque value and the exhaust emission value, the estimated exhaust emission value can be determined more quickly and efficiently, the recommended gear and the recommended rotation speed are provided for the automatic transmission based on the emission requirement of an engine, the gear shifting of the automatic transmission is optimized and limited, and therefore the situation that the vehicle emission exceeds the standard when the automatic transmission shifts is reduced.
In one possible implementation, the speed limit range is determined based on a urea pump boost speed requirement of the vehicle.
According to the method, the rotating speed limiting range is determined according to the pressure building rotating speed requirement of the urea pump of the vehicle, and the urea pump of the vehicle under the recommended gear can be guaranteed to be normally pressurized, so that the emission requirement based on an engine is met, the recommended gear and the recommended rotating speed are provided for the automatic gearbox, the gear shifting of the automatic gearbox is optimally limited, and the condition that the vehicle emission exceeds the standard during the gear shifting of the automatic gearbox is reduced.
In one possible implementation manner, if the pre-recommended rotation speed is within a rotation speed limit range of the vehicle, taking the pre-recommended rotation speed as the recommended rotation speed and taking the pre-recommended gear as the recommended gear includes:
if the pre-recommended rotating speed is within the rotating speed limit range of the vehicle, determining whether the vehicle is in a safe working condition;
and if the vehicle is determined not to be in the safe working condition, taking the pre-recommended rotating speed as a recommended rotating speed and the pre-recommended gear as a recommended gear.
According to the method, when the pre-recommended rotating speed is within the rotating speed limiting range of the vehicle and the vehicle is not in the safe working condition, the pre-recommended rotating speed is used as the recommended rotating speed and the pre-recommended gear is used as the recommended gear, so that when the vehicle is not in the safe working condition, the recommended gear and the recommended rotating speed are provided for the automatic transmission based on the emission requirement of the engine, the gear shifting of the automatic transmission is optimally limited, and the condition that the vehicle emission exceeds the standard when the automatic transmission is shifted is reduced.
In one possible implementation, the method further includes:
and if the pre-recommended rotating speed is not within the rotating speed limiting range of the vehicle, or the pre-recommended rotating speed is within the rotating speed limiting range of the vehicle, and the vehicle is in a safe working condition, taking the current rotating speed under the current gear as the recommended rotating speed and taking the current gear as the recommended gear.
According to the method, when the pre-recommended rotating speed is not within the rotating speed limit range of the vehicle or the vehicle is in a safe working condition, the current rotating speed in the current gear is used as the recommended rotating speed and the current gear is used as the recommended gear. The method can avoid the situation that the urea pump of the vehicle under the recommended gear cannot build pressure normally or the performance requirement of the safe working condition cannot be met under the recommended gear, so that the overall efficiency of the automatic gearbox during gear shifting control is ensured while the situation that the vehicle emission exceeds the standard during gear shifting of the automatic gearbox is reduced, and the user experience degree of the gear shifting control process is improved.
In a second aspect, an embodiment of the present application provides an automatic transmission shift control device, including:
the basic parameter estimation module is used for determining estimated basic parameter values of the vehicle in each adjacent gear of the current gear according to the operation parameter values of the vehicle in the current gear;
the exhaust emission estimation module is used for determining an estimated exhaust emission value under each adjacent gear according to the estimated basic parameter value under each adjacent gear;
the pre-estimation parameter determining module is used for determining a pre-recommended gear and a pre-recommended rotating speed of the vehicle according to the estimated exhaust emission value of each adjacent gear and the current exhaust emission value of the current gear; the pre-recommended gear is a gear corresponding to the minimum value of the estimated exhaust emission value and the current exhaust emission value under each adjacent gear;
and the control parameter determining module is used for taking the pre-recommended rotating speed as the recommended rotating speed and taking the pre-recommended gear as the recommended gear if the pre-recommended rotating speed is within the rotating speed limiting range of the vehicle.
In a possible implementation manner, the control parameter determining module is specifically configured to:
if the pre-recommended rotating speed is within the rotating speed limit range of the vehicle, determining whether the vehicle is in a safe working condition;
and if the vehicle is determined not to be in the safe working condition, taking the pre-recommended rotating speed as a recommended rotating speed and the pre-recommended gear as a recommended gear.
In a possible implementation manner, the estimated basic parameter values include an estimated rotation speed value, an estimated torque value and an estimated exhaust temperature value; the basic parameter estimation module is specifically configured to:
determining the estimated rotation speed value and the estimated torque value of the vehicle in each adjacent gear of the current gear according to the operation parameter value of the vehicle in the current gear;
and determining the estimated rotation speed value and the estimated exhaust temperature value corresponding to the estimated torque value under each adjacent gear according to a first corresponding relation of a preset rotation speed value, a preset torque value and an estimated exhaust temperature value.
In a possible implementation manner, the estimated basic parameter values comprise an estimated rotation speed value, an estimated torque value and an estimated exhaust temperature value; the exhaust emission estimation module is specifically used for:
and determining the estimated rotation speed value, the estimated torque value and the estimated exhaust gas emission value corresponding to the estimated exhaust temperature value under each adjacent gear according to a preset second corresponding relation of the exhaust temperature value, the rotation speed value, the torque value and the exhaust gas emission value.
In one possible implementation, the speed limit range is determined based on a urea pump boost speed requirement of the vehicle.
In a possible implementation manner, the control parameter determination module is further configured to:
and if the pre-recommended rotating speed is not within the rotating speed limiting range of the vehicle, or the pre-recommended rotating speed is within the rotating speed limiting range of the vehicle, and the vehicle is in a safe working condition, taking the current rotating speed under the current gear as the recommended rotating speed and taking the current gear as the recommended gear.
In a third aspect, an electronic device is provided, comprising a processor and a memory, wherein the memory has stored program code which, when executed by the processor, causes the processor to carry out the steps of any of the above-described automatic transmission shift control methods.
In a fourth aspect, a computer-readable storage medium is provided, having a computer program stored therein, which, when executed by a processor, implements the automatic transmission shift control method of any of the above.
For technical effects brought by any one implementation manner of the second aspect to the fourth aspect, reference may be made to the technical effects brought by the implementation manner of the first aspect, and details are not described here.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic diagram of a vehicle emission test road spectrum of the related art;
FIG. 2 is a schematic flow chart illustrating a method for controlling shifting of an automatic transmission according to an embodiment of the present disclosure;
FIG. 3 is a schematic flow chart illustrating another method for controlling shifting of an automatic transmission according to an embodiment of the present application;
FIG. 4 is a schematic structural diagram of a shift control device of an automatic transmission according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Some terms in the embodiments of the present application are explained below to facilitate understanding by those skilled in the art.
(1) An ECU: (Electronic Control Unit ): the ECU, also called an "engine electronic control unit", is a controller that performs calculation, processing, and judgment based on signals input from various sensors, and then outputs commands to control the operation of an actuator.
(2) And (3) post-treatment: belongs to a part of an engine and is used for treating emission pollutants in exhaust gas.
(3) Urea: the engine controls the reactant of exhaust emission, and the urea reacts with the nitrogen oxide in the exhaust in the post-treatment to generate nitrogen and water.
(4) A rack: the test equipment for calibrating the engine is used for calibrating various performance parameters of the engine, including engine rotating speed, engine torque, fuel injection quantity, emission and the like.
(5) Safe working conditions are as follows: the safe working conditions comprise a starting process, a braking and vehicle passing process, a gear shifting process, a rapid acceleration, a rapid deceleration, a manual mode and the like. In order to ensure the requirements of starting, braking, gear shifting, urgent acceleration, urgent deceleration, manual modes and other safety conditions under the safe working condition, the safety and the dynamic property under the working condition are ensured.
(6) The urea pump builds pressure and rotates at a speed required: when the vehicle meets a certain urea pump pressure buildup condition, a urea pump pressure buildup command is sent out, so that the urea pump starts to operate, and the urea pump stops operating until the urea pressure sensor detects that the urea pressure reaches a certain value, such as 500-600 KPa. When the pressure build-up is successful, the air cut-off valve is opened, and air flows out of the urea pump through the mixing chamber and enters the nozzle. The urea pump pressure building condition comprises a urea pump pressure building rotating speed requirement and a urea pump spraying temperature requirement. The urea pump pressure building rotating speed requirement means that the required rotating speed exceeds a preset rotating speed threshold value, and the set rotating speed threshold value is called urea pump pressure building rotating speed. The urea pump may begin to build pressure only when the speed exceeds the urea pump pressure build speed.
(7) Each gear ratio: each gear ratio refers to different gears of the automatic gearbox, and the gears correspond to different transmission ratios.
In order to reduce the occurrence of the condition that the vehicle emission exceeds the standard when the automatic gearbox shifts gears, the embodiment of the application provides a gear shifting control method and device of the automatic gearbox, electronic equipment and a medium. In order to better understand the technical solution provided by the embodiments of the present application, the basic principle of the solution is briefly described here.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the accompanying drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be implemented in sequences other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
The technical scheme provided by the embodiment of the application is described below with reference to the accompanying drawings.
With the enhancement of environmental awareness, more and more environmental regulations are applied, and the emission requirements of vehicles are increasingly strict. The emission control strategy of the engine of the vehicle cannot ensure that all working points can meet the emission requirement.
In the related technology, the gear shifting strategy of the automatic gearbox matched with the whole vehicle is to perform automatic gear shifting based on the rotating speed of an engine, the opening degree of an accelerator pedal and the speed of the vehicle, the emission requirement of the engine cannot be completely adapted, and the emission of the vehicle is easily caused to exceed the standard. As shown in fig. 1, under the shift strategy of the automatic transmission in the related art, the typical operating condition range of the frame selection part in the figure may cause the emission to exceed the standard, which may cause the emission test of the whole vehicle to fail.
In view of this, embodiments of the present application provide a method, an apparatus, an electronic device, and a medium for controlling gear shifting of an automatic transmission, which determine an estimated basic parameter value of a vehicle in each adjacent gear of a current gear according to an operating parameter value of the vehicle in the current gear; determining estimated exhaust emission values of adjacent gears according to estimated basic parameter values of the adjacent gears; determining a pre-recommended gear and a pre-recommended rotating speed of the vehicle according to the estimated exhaust emission value under each adjacent gear and the current exhaust emission value under the current gear; and if the pre-recommended rotating speed is within the rotating speed limit range of the vehicle, using the pre-recommended rotating speed as the recommended rotating speed and using the pre-recommended gear as the recommended gear. According to the method, a recommended gear and a recommended rotating speed are provided for the automatic gearbox according to the running parameter value of the vehicle in the current gear and based on the emission requirement of an engine, and the gear shifting of the automatic gearbox is optimally limited, so that the condition that the vehicle emission exceeds the standard when the automatic gearbox is shifted is reduced.
The preferred embodiments of the present application will be described below with reference to the accompanying drawings of the specification, it should be understood that the preferred embodiments described herein are merely for illustrating and explaining the present application, and are not intended to limit the present application, and that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The shift control method for the automatic transmission provided in the embodiments of the present application is further explained below. As shown in fig. 2, the method comprises the following steps:
s201, determining estimated basic parameter values of the vehicle in each adjacent gear of the current gear according to the operation parameter values of the vehicle in the current gear.
Specifically, the operating parameter values include, but are not limited to, some or all of the following: the engine speed, the engine torque, the exhaust temperature, the vehicle speed, the gears, the gear speed ratio, the rear axle comprehensive speed ratio, the tire rolling radius and the power.
The adjacent gears are a plurality of gears which take the current gear as the center and have a distance from the current gear not exceeding a first preset threshold. The first preset threshold may be a fixed number, for example 2. For example, assuming that the first preset threshold value is 2, the automatic transmission has 12 gears, and if the current gear sent by the transmission is the ith gear, the adjacent gears are a plurality of gears determined by (i-2, i-1, i + 2), wherein the distance from each adjacent gear to the current gear is not more than 2. The number of adjacent gears of the i-th gear determined in the above embodiment may be 4, 2 or 3.
In some embodiments, the exhaust emission value of the engine is estimated according to the current engine speed and torque and an engine emission universal data curve graph obtained based on engine bench test data; and automatically calculating the rotating speed and torque of the engine in the adjacent gear and the exhaust temperature according to the vehicle speed and the gear ratio of each gear of the automatic gearbox.
Wherein the exhaust emission value is usually NO in the exhaust X Emission values, typically NO X The concentration of (c).
Illustratively, the current vehicle speed is 40km/h, the current gear is 10, the engine speed is 800rpm, the engine torque is 400Nm, the exhaust temperature is 250 ℃, and the current NO is obtained according to an engine emission universal data curve chart of engine bench test data X The emission value was 900ppm.
The engine emission has a data curve chart, and is a specific data with an X axis as engine rotating speed, a Y axis as engine torque and a Z axis as exhaust emission. Therefore, as long as the data of the engine rotating speed and the engine torque exist, the engine emission universal data curve graph can be checked to obtain the current exhaust emission value which is used as the current exhaust emission value.
In one possible implementation, the estimated basic parameter values include an estimated rotation speed value, an estimated torque value, and an estimated exhaust temperature value.
According to the operation parameter value of the vehicle in the current gear, the estimated basic parameter value of the vehicle in each adjacent gear of the current gear is determined, and the method can be specifically realized through the following steps:
and A01, determining an estimated rotation speed value and an estimated torque value of the vehicle in each adjacent gear of the current gear according to the operation parameter value of the vehicle in the current gear.
Specifically, according to the operation parameter value of the vehicle in the current gear: the estimated rotation speed value and the estimated torque value of the vehicle in each adjacent gear of the current gear can be determined according to the engine rotation speed, the engine torque, the exhaust temperature, the vehicle speed, the gears, the gear ratio of each gear, the comprehensive speed ratio of a rear axle, the rolling radius of a tire and the power.
Illustratively, in one embodiment of the present application, the estimated speed value is calculated according to the following vehicle speed calculation formula:
and calculating the estimated torque value according to the following power calculation formula:
for example, assuming that the current vehicle speed is 40km/h, the current gear is 10, the engine speed is 800rpm, the engine torque is 400Nm, and the exhaust temperature is 250 ℃, the engine speed and the engine torque of the adjacent gear are calculated according to the vehicle speed calculation formula and the power calculation formula, as follows:
8-gear engine speed 1200rpm, engine torque 267Nm;
the 9-gear engine speed is 1000rpm, and the engine torque is 320Nm;
11-gear engine speed 700rpm, engine torque 457Nm;
engine speed 600rpm in 12 th gear and engine torque 533Nm.
And A02, determining an estimated rotation speed value and an estimated exhaust temperature value corresponding to the estimated torque value under each adjacent gear according to a first corresponding relation of a preset rotation speed value, a preset torque value and an exhaust temperature value.
Specifically, the first corresponding relationship between the rotation speed value, the torque value and the exhaust temperature value is an engine exhaust temperature all-round curve graph.
Exemplarily, assuming that the current vehicle speed is 40km/h, the current gear is 10 gears, the engine speed is 800rpm, the engine torque is 400Nm, and the exhaust temperature is 250 ℃, looking up an engine exhaust temperature all-purpose curve graph according to the calculated engine speed and the engine torque of the adjacent gears, and obtaining estimated exhaust temperature values corresponding to the estimated speed values and the estimated torque values of each adjacent gear as follows:
8-gear engine speed of 1200rpm, engine torque of 267Nm and exhaust temperature of 220 ℃;
the 9-gear engine rotation speed is 1000rpm, the engine torque is 320Nm, and the exhaust temperature is 230 ℃;
the rotation speed of the 11-gear engine is 700rpm, the torque of the engine is 457Nm, and the exhaust temperature is 225 ℃;
the engine speed of the 12-gear engine is 600rpm, the engine torque is 533Nm, and the exhaust temperature is 210 ℃.
S202, determining the estimated exhaust emission value of each adjacent gear according to the estimated basic parameter value of each adjacent gear.
In specific implementation, a universal data curve graph of engine emission is inquired according to estimated basic parameter values under each adjacent gear, and estimated exhaust emission values under each adjacent gear are determined.
In one possible implementation, the estimated basic parameter values include an estimated rotation speed value, an estimated torque value, and an estimated exhaust temperature value.
According to the estimated basic parameter values under each adjacent gear, the estimated exhaust emission value under each adjacent gear is determined, and the method specifically comprises the following steps: and determining an estimated rotation speed value, an estimated torque value and an estimated exhaust gas emission value corresponding to the estimated exhaust temperature value under each adjacent gear according to a second corresponding relation of the preset exhaust temperature value, the rotation speed value, the torque value and the exhaust value.
The second corresponding relation of the preset exhaust temperature value, the preset rotation speed value, the preset torque value and the preset exhaust value is a pre-calibrated engine exhaust universal data curve graph.
For example, assuming that the current vehicle speed is 40km/h, the current gear is 10, the engine speed is 800rpm, the engine torque is 400Nm, the exhaust temperature is 250 ℃, and the emission value of each adjacent gear is obtained by looking up a graph of all data of engine emissions, and the following data is obtained:
and 8, gear shifting: rotating at 1200rpm, and estimating the exhaust emission value to be 200ppm;
and 9, blocking: rotating at 1000rpm, and estimating the exhaust emission value to be 500ppm;
and (3) 11 gear: rotating speed 700rpm, and estimating exhaust emission value 1200ppm;
and (4) 12 gear: the rotating speed is 600rpm, and the estimated exhaust emission value is 1300ppm.
S203, determining a pre-recommended gear and a pre-recommended rotating speed of the vehicle according to the estimated exhaust emission value of each adjacent gear and the current exhaust emission value of the current gear.
The pre-recommended gear is a gear corresponding to the minimum value of the estimated exhaust emission value and the current exhaust emission value of each adjacent gear; the current exhaust emission value in the current gear is the emission value of the engine determined according to the current running parameters of the vehicle in the current gear and by combining an engine emission universal data curve graph obtained based on engine bench test data.
For example, assuming that the current vehicle speed is 40km/h, the current gear is 10 gears, the engine speed is 800rpm, the engine torque is 400Nm, the exhaust temperature is 250 ℃, and if the current exhaust emission value of the current gear is 900ppm, the emission of each adjacent gear is obtained as follows:
and 8, gear shifting: rotating at 1200rpm, and estimating the exhaust emission value to be 200ppm;
and 9, blocking: rotating at 1000rpm, and estimating the exhaust emission value to be 500ppm;
and (3) 11 gear: rotating speed 700rpm, and estimating exhaust emission value 1200ppm;
and (4) 12 gear: the rotating speed is 600rpm, the exhaust emission value is estimated to be 1300ppm,
then, according to the emission priority principle, selecting a gear corresponding to the minimum value of the estimated exhaust emission value and the current exhaust emission value of each adjacent gear, thereby obtaining: the pre-recommended gear 8 of the vehicle is achieved, and the pre-recommended rotating speed is 1200rpm.
And S204, if the pre-recommended rotating speed is within the rotating speed limit range of the vehicle, using the pre-recommended rotating speed as the recommended rotating speed and using the pre-recommended gear as the recommended gear.
The rotation speed limit range of the vehicle is a recommended range of the engine rotation speed that is preset according to the urea injection condition of the engine and the like. Urea injection conditions include, but are not limited to, some or all of the following: the pressure build-up rotating speed requirement of the urea pump, the urea injection temperature requirement and the pressure relief condition of the urea pump.
In one possible implementation, the speed limit range is determined based on a urea pump boost speed requirement of the vehicle.
In the embodiment of the application, the reasonable recommended gear and the reasonable recommended rotating speed are further output according to the pre-recommended gear and the pre-recommended rotating speed which are calculated according to the emission priority principle and the rotating speed limit range which is output based on the pressure build requirement of the urea pump, and are transmitted to the automatic gearbox.
For example, assuming that the pressure build-up requirement of the urea pump calibrated by the engine itself is that the engine speed is greater than 1000rpm, if the pre-recommended gear is 8 gears and the pre-recommended speed is 1200rpm, it can be determined that the pre-recommended speed meets the pressure build-up speed requirement of the urea pump, and therefore the final recommended gear and the final recommended speed are generated.
In a possible implementation manner, if the pre-recommended rotation speed is within the rotation speed limit range of the vehicle, the pre-recommended rotation speed is used as the recommended rotation speed and the pre-recommended gear is used as the recommended gear, which may specifically be implemented by the following steps:
and C01, if the pre-recommended rotating speed is within the rotating speed limit range of the vehicle, determining whether the vehicle is in a safe working condition.
Among these, safe operating conditions include, but are not limited to, the following: starting, braking, gear shifting, rapid acceleration, rapid deceleration and manual mode. The safe working condition belongs to some working conditions which are easy to cause danger or meet when danger is generated in the driving process.
And step C02, if the vehicle is determined not to be in the safe working condition, using the pre-recommended rotating speed as the recommended rotating speed and using the pre-recommended gear as the recommended gear.
Although the emission is a regulatory requirement, when the safety of the vehicle is involved, driving safety is required to be the first principle, so that if the vehicle is determined not to be in a safe working condition, the pre-recommended rotating speed is used as the recommended rotating speed and the pre-recommended gear is used as the recommended gear.
In a possible implementation manner, when the recommended gear and the recommended rotating speed are determined, if the pre-recommended rotating speed is not within the rotating speed limiting range of the vehicle, or the pre-recommended rotating speed is within the rotating speed limiting range of the vehicle, and the vehicle is in a safe working condition, the current rotating speed under the current gear is used as the recommended rotating speed, and the current gear is used as the recommended gear.
On the one hand, when driving safety is involved, driving safety is taken as a first principle, so that when the automatic gearbox is in a safe working condition, the automatic gearbox is not required to consider a pre-recommended gear based on emission; on the other hand, if the pre-recommended rotating speed does not meet the pressure building rotating speed requirement of the urea pump, the pre-recommended gear based on emission is not sent to the automatic gearbox.
In the method for controlling shifting of an automatic transmission shown in fig. 2, according to the operating parameter value of the vehicle in the current gear, estimated basic parameter values of the vehicle in each adjacent gear of the current gear are determined; determining an estimated exhaust emission value under each adjacent gear according to the estimated basic parameter value under each adjacent gear; determining a pre-recommended gear and a pre-recommended rotating speed of the vehicle according to the estimated exhaust emission value under each adjacent gear and the current exhaust emission value under the current gear; and if the pre-recommended rotating speed is within the rotating speed limit range of the vehicle, using the pre-recommended rotating speed as the recommended rotating speed and using the pre-recommended gear as the recommended gear. According to the method, according to the running parameter value of the vehicle in the current gear, the recommended gear and the recommended rotating speed are provided for the automatic gearbox based on the emission requirement of the engine, and the gear shifting of the automatic gearbox is optimally limited, so that the condition that the vehicle emission exceeds the standard when the automatic gearbox is shifted is reduced.
Another method for controlling shifting of an automatic transmission according to an embodiment of the present application is described below. As shown in fig. 3.
Step S301, according to the operation parameter value of the vehicle in the current gear, determining the estimated rotation speed value and the estimated torque value of the vehicle in each adjacent gear of the current gear.
Step S302, according to a first corresponding relation of a preset rotating speed value, a preset torque value and a preset exhaust temperature value, an estimated rotating speed value and an estimated exhaust temperature value corresponding to the estimated torque value under each adjacent gear are determined.
Step S303, determining an estimated rotation speed value, an estimated torque value and an estimated exhaust gas emission value corresponding to the estimated exhaust gas emission value under each adjacent gear according to a preset second corresponding relation of the exhaust temperature value, the rotation speed value, the torque value and the exhaust gas emission value.
The second corresponding relation of the preset exhaust temperature value, the preset rotation speed value, the preset torque value and the preset exhaust value is a pre-calibrated engine exhaust universal data curve graph.
And S304, determining a pre-recommended gear and a pre-recommended rotating speed of the vehicle according to the estimated exhaust emission value of each adjacent gear and the current exhaust emission value of the current gear.
The pre-recommended gear is a gear corresponding to the minimum value of the estimated exhaust emission value and the current exhaust emission value under each adjacent gear; the current exhaust emission value in the current gear is the exhaust emission value of the engine determined according to the current running parameters of the vehicle in the current gear and by combining an engine emission universal data curve graph obtained based on engine bench test data.
In step S305, it is determined whether the pre-recommended rotation speed is within the rotation speed limit range of the vehicle. If yes, go to step S306; if not, go to step S308.
And step S306, determining whether the vehicle is in a safe working condition. If the determination result is negative, after executing step S307, executing step S309; if the determination result is yes, step S309 is executed after step S308 is executed.
And step S307, taking the pre-recommended rotating speed as the recommended rotating speed and the pre-recommended gear as the recommended gear.
And step S308, taking the current rotating speed under the current gear as the recommended rotating speed and taking the current gear as the recommended gear.
And step S309, sending the recommended rotating speed and the recommended gear to the automatic gearbox.
The process of the shift control of the automatic transmission in steps S301 to S309 may be executed by referring to the specific process in the foregoing embodiment, and will not be described herein again.
Based on the same inventive concept, the embodiment of the application also provides a gear shifting control device of the automatic gearbox. As shown in fig. 4, the apparatus includes:
the basic parameter estimation module 401 is configured to determine estimated basic parameter values of the vehicle in each adjacent gear of the current gear according to the operation parameter values of the vehicle in the current gear;
the exhaust emission estimation module 402 is configured to determine an estimated exhaust emission value in each adjacent gear according to the estimated basic parameter value in each adjacent gear;
the pre-estimation parameter determination module 403 is configured to determine a pre-recommended gear and a pre-recommended rotation speed of the vehicle according to the estimated exhaust emission value in each adjacent gear and the current exhaust emission value in the current gear; the pre-recommended gear is a gear corresponding to the minimum value of the estimated exhaust emission value and the current exhaust emission value under each adjacent gear;
and the control parameter determining module 404 is configured to use the pre-recommended rotating speed as the recommended rotating speed and use the pre-recommended gear as the recommended gear if the pre-recommended rotating speed is within the rotating speed limit range of the vehicle.
In a possible implementation manner, the control parameter determining module 404 is specifically configured to:
if the pre-recommended rotating speed is within the rotating speed limiting range of the vehicle, determining whether the vehicle is in a safe working condition;
and if the fact that the vehicle is not in the safe working condition is determined, the pre-recommended rotating speed is used as the recommended rotating speed, and the pre-recommended gear is used as the recommended gear.
In one possible implementation, the estimated basic parameter values include an estimated rotation speed value, an estimated torque value and an estimated exhaust temperature value; the basic parameter estimation module 401 is specifically configured to:
determining a pre-estimated rotation speed value and a pre-estimated torque value of the vehicle in each adjacent gear of the current gear according to the operation parameter value of the vehicle in the current gear;
and determining the estimated rotation speed value and the estimated exhaust temperature value corresponding to the estimated torque value under each adjacent gear according to the first corresponding relation of the preset rotation speed value, the preset torque value and the exhaust temperature value.
In one possible implementation, the estimated basic parameter values include an estimated rotation speed value, an estimated torque value and an estimated exhaust temperature value; the exhaust emission estimation module 402 is specifically configured to:
and determining an estimated rotation speed value, an estimated torque value and an estimated exhaust gas emission value corresponding to the estimated exhaust temperature value under each adjacent gear according to a second corresponding relation of the preset exhaust temperature value, the rotation speed value, the torque value and the exhaust value.
In one possible implementation, the speed limit range is determined based on a urea pump boost speed requirement of the vehicle.
In one possible implementation, the control parameter determining module 404 is further configured to:
and if the pre-recommended rotating speed is not within the rotating speed limiting range of the vehicle, or the pre-recommended rotating speed is within the rotating speed limiting range of the vehicle, and the vehicle is in a safe working condition, taking the current rotating speed under the current gear as the recommended rotating speed and taking the current gear as the recommended gear.
Based on the same technical concept, embodiments of the present application further provide an electronic device, as shown in fig. 5, the electronic device is configured to implement the methods described in the above method embodiments, for example, implement the method shown in fig. 1, and the electronic device may include a memory 501, a processor 502, an input unit 503, and a display panel 504.
A memory 501 for storing computer programs executed by the processor 502. The memory 501 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function, and the like; the storage data area may store data created according to use of the electronic device, and the like. The processor 502 may be a Central Processing Unit (CPU), a digital processing unit, or the like. The input unit 503 may be used to obtain a user instruction input by a user. The display panel 504 is configured to display information input by a user or information provided to the user, and in this embodiment of the present application, the display panel 504 is mainly used to display a display interface of each application program in the terminal device and a control entity displayed in each display interface. Alternatively, the display panel 504 may be configured in the form of a Liquid Crystal Display (LCD) or an organic light-emitting diode (OLED), and the like.
The embodiment of the present application does not limit the specific connection medium among the memory 501, the processor 502, the input unit 503, and the display panel 504. In the embodiment of the present application, the memory 501, the processor 502, the input unit 503, and the display panel 504 are connected by the bus 505 in fig. 5, the bus 505 is represented by a thick line in fig. 5, and the connection manner between other components is merely illustrative and not limited thereto. The bus 505 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 5, but this is not intended to represent only one bus or type of bus.
The memory 501 may be a volatile memory (volatile memory), such as a random-access memory (RAM); the memory 501 may also be a non-volatile memory (non-volatile memory) such as, but not limited to, a read-only memory (rom), a flash memory (flash memory), a Hard Disk Drive (HDD) or a solid-state drive (SSD), or any other medium which can be used to carry or store desired program code in the form of instructions or data structures and which can be accessed by a computer. The memory 501 may be a combination of the above memories.
A processor 502 for invoking a computer program stored in the memory 501 to perform the embodiment as shown in fig. 1.
The embodiment of the present application further provides a computer-readable storage medium, which stores computer-executable instructions required to be executed by the processor, and includes a program required to be executed by the processor.
In some possible embodiments, the aspects of an automatic transmission shift control method provided herein may also be implemented in the form of a program product comprising program code for causing a terminal device to perform the steps of an automatic transmission shift control method according to various exemplary embodiments of the present application described above in this specification when the program product is run on the terminal device. For example, the electronic device may perform the embodiment as shown in fig. 1.
The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
A shift control program product for an automatic transmission according to embodiments of the present application may employ a portable compact disk read-only memory (CD-ROM) and include program code, and may be executed on a computing device. However, the program product of the present application is not so limited, and in this document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A readable signal medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Program code for carrying out operations of the present application may be written in any combination of one or more programming languages, including a physical programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device over any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., over the internet using an internet service provider).
It should be noted that although several units or sub-units of the apparatus are mentioned in the above detailed description, such division is merely exemplary and not mandatory. Indeed, the features and functions of two or more units described above may be embodied in one unit, according to embodiments of the application. Conversely, the features and functions of one unit described above may be further divided into embodiments by a plurality of units.
Further, while the operations of the methods of the present application are depicted in the drawings in a particular order, this does not require or imply that these operations must be performed in this particular order, or that all of the illustrated operations must be performed, to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable document processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable document processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable document processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable document processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the preferred embodiments of the present application have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A method of shift control for an automatic transmission, the method comprising:
determining estimated basic parameter values of a vehicle in each adjacent gear of the current gear according to the running parameter values of the vehicle in the current gear; the operation parameter values comprise engine rotating speed, engine torque, exhaust temperature, vehicle speed, gear positions, speed ratios of all gears, comprehensive speed ratio of a rear axle, rolling radius of tires and power; the estimated basic parameter values comprise an estimated rotating speed value, an estimated torque value and an estimated exhaust temperature value;
determining estimated exhaust emission values under each adjacent gear according to the estimated basic parameter values under each adjacent gear;
determining a pre-recommended gear and a pre-recommended rotating speed of the vehicle according to the estimated exhaust emission value of each adjacent gear and the current exhaust emission value of the current gear; the pre-recommended gear is a gear corresponding to the minimum value of the estimated exhaust emission value and the current exhaust emission value under each adjacent gear;
and if the pre-recommended rotating speed is within the rotating speed limiting range of the vehicle, taking the pre-recommended rotating speed as the recommended rotating speed and taking the pre-recommended gear as the recommended gear.
2. The method of claim 1, wherein determining the estimated base parameter values for the vehicle in each of the adjacent gears to the current gear based on the operating parameter values for the vehicle in the current gear comprises:
determining the estimated rotation speed value and the estimated torque value of the vehicle at each adjacent gear of the current gear according to the operating parameter value of the vehicle at the current gear;
and determining the estimated rotation speed value and the estimated exhaust temperature value corresponding to the estimated torque value under each adjacent gear according to a first corresponding relation of a preset rotation speed value, a preset torque value and an exhaust temperature value.
3. The method of claim 1, wherein determining the estimated exhaust emission values for each of the adjacent gears based on the estimated base parameter values for each of the adjacent gears comprises:
and determining the estimated rotation speed value, the estimated torque value and the estimated exhaust gas emission value corresponding to the estimated exhaust temperature value under each adjacent gear according to a preset second corresponding relation of the exhaust temperature value, the rotation speed value, the torque value and the emission value.
4. The method of claim 1, wherein the speed limit range is determined based on a urea pump boost speed requirement of the vehicle.
5. The method according to any one of claims 1 to 4, wherein if the pre-recommended rotation speed is within a rotation speed limit range of the vehicle, using the pre-recommended rotation speed as a recommended rotation speed and the pre-recommended gear as a recommended gear comprises:
if the pre-recommended rotating speed is within the rotating speed limit range of the vehicle, determining whether the vehicle is in a safe working condition;
and if the vehicle is determined not to be in the safe working condition, taking the pre-recommended rotating speed as a recommended rotating speed and the pre-recommended gear as a recommended gear.
6. The method of claim 5, further comprising:
and if the pre-recommended rotating speed is not within the rotating speed limit range of the vehicle, or the pre-recommended rotating speed is within the rotating speed limit range of the vehicle, and the vehicle is in a safe working condition, taking the current rotating speed under the current gear as the recommended rotating speed and taking the current gear as the recommended gear.
7. A shift control device for an automatic transmission, said device comprising:
the basic parameter estimation module is used for determining estimated basic parameter values of the vehicle at each adjacent gear of the current gear according to the operation parameter values of the vehicle at the current gear; the operation parameter values comprise engine rotating speed, engine torque, exhaust temperature, vehicle speed, gear positions, speed ratios of all gears, comprehensive speed ratio of a rear axle, rolling radius of tires and power; the estimated basic parameter values comprise an estimated rotating speed value, an estimated torque value and an estimated exhaust temperature value;
the exhaust emission estimation module is used for determining estimated exhaust emission values under each adjacent gear according to the estimated basic parameter values under each adjacent gear;
the pre-estimation parameter determining module is used for determining a pre-recommended gear and a pre-recommended rotating speed of the vehicle according to the estimated exhaust emission value of each adjacent gear and the current exhaust emission value of the current gear; the pre-recommended gear is a gear corresponding to the minimum value of the estimated exhaust emission value and the current exhaust emission value under each adjacent gear;
and the control parameter determining module is used for taking the pre-recommended rotating speed as the recommended rotating speed and taking the pre-recommended gear as the recommended gear if the pre-recommended rotating speed is within the rotating speed limiting range of the vehicle.
8. The apparatus of claim 7, wherein the control parameter determining module is specifically configured to:
if the pre-recommended rotating speed is within the rotating speed limit range of the vehicle, determining whether the vehicle is in a safe working condition;
and if the vehicle is determined not to be in the safe working condition, taking the pre-recommended rotating speed as a recommended rotating speed and the pre-recommended gear as a recommended gear.
9. An electronic device, characterized in that it comprises a processor and a memory, wherein the memory stores program code which, when executed by the processor, causes the processor to carry out the steps of the method according to any one of claims 1 to 6.
10. A computer-readable storage medium having a computer program stored therein, the computer program characterized by: the computer program, when executed by a processor, implements the method of any one of claims 1 to 6.
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| CN113357359A (en) | 2021-09-07 |
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