CN108189831A - Prevent vehicle from generating the method and system of impact - Google Patents
Prevent vehicle from generating the method and system of impact Download PDFInfo
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- CN108189831A CN108189831A CN201711499553.6A CN201711499553A CN108189831A CN 108189831 A CN108189831 A CN 108189831A CN 201711499553 A CN201711499553 A CN 201711499553A CN 108189831 A CN108189831 A CN 108189831A
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 230000005540 biological transmission Effects 0.000 claims abstract description 74
- 230000009467 reduction Effects 0.000 claims description 40
- 230000035939 shock Effects 0.000 claims description 7
- 238000004590 computer program Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
- B60W30/188—Controlling power parameters of the driveline, e.g. determining the required power
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/06—Combustion engines, Gas turbines
- B60W2510/0638—Engine speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/08—Electric propulsion units
- B60W2510/081—Speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
- B60W2710/0666—Engine torque
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
The present invention provides the method and systems for preventing vehicle from generating impact, and applied to automatic transmission, automatic transmission includes control unit of engine ECU and gear box control unit TCU, method include：When vehicle accelerator is operated, control unit of engine ECU obtains throttle and steps on signal, and throttle is stepped on signal and is sent to gear box control unit TCU；Gear box control unit TCU steps on signal according to throttle and drop torsion request is sent to control unit of engine ECU；Control unit of engine ECU turns round request control engine according to drop reduces torque.The present invention works as vehicle in no throttle to having under the operating mode of throttle, by reducing the torque of engine at this time, so as to alleviate generated impact of stepping on the gas suddenly, improves driver comfort.
Description
Technical Field
The invention relates to the technical field of vehicle control, in particular to a method and a system for preventing a vehicle from generating impact.
Background
The vehicle runs under the condition of not stepping on the accelerator, the rotating speed of the engine is less than the rotating speed of the input shaft of the gearbox, when the accelerator is suddenly stepped on, the rotating speed of the engine can be increased, the torque is increased, and when the rotating speed of the engine is equal to the rotating speed of the input shaft of the gearbox, the vehicle generates impact.
The existing vehicle has no solution to the problems, and cannot avoid impact caused by suddenly stepping on an accelerator, so that the driving comfort of the whole vehicle is influenced.
Disclosure of Invention
In view of the above, the present invention provides a method and a system for preventing a vehicle from generating an impact, so as to solve the problem that the driving comfort of the entire vehicle is affected because the existing vehicle cannot avoid the impact generated by suddenly stepping on the accelerator.
In a first aspect, an embodiment of the present invention provides a method for preventing a vehicle from generating a shock, which is applied to an automatic transmission including an engine control unit ECU and a transmission control unit TCU, and includes:
when the accelerator of a vehicle is stepped on, the engine control unit ECU acquires an accelerator stepping signal and sends the accelerator stepping signal to the transmission control unit TCU;
the transmission control unit TCU sends a torque reduction request to the engine control unit ECU according to the accelerator stepping signal;
and the engine control unit ECU controls the engine to reduce the torque according to the torque reduction request.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where, when a throttle of a vehicle is pressed down, the engine control unit ECU obtains a throttle pressing signal and sends the throttle pressing signal to a transmission control unit TCU, and the method includes:
when an accelerator of a vehicle is stepped on, an Engine Control Unit (ECU) acquires an accelerator pedal signal and obtains the accelerator stepping signal according to the accelerator pedal signal;
and the engine control unit ECU sends the accelerator stepping signal to the transmission control unit TCU.
With reference to the first aspect, the embodiment of the invention provides a second possible implementation manner of the first aspect, wherein the controlling the engine to reduce the torque according to the torque reduction request by the engine control unit ECU includes:
the engine control unit ECU controls the engine to reduce the oil quantity according to the torque reduction request;
or,
the engine control unit ECU controls the engine to reduce the air quantity according to the torque reduction request;
or,
and the engine control unit ECU controls the engine to reduce the ignition advance angle according to the torque reduction request.
With reference to the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, where the sending, by the engine control unit ECU, the accelerator press-down signal to the transmission control unit TCU includes:
and the engine control unit ECU sends the accelerator stepping signal to the transmission control unit TCU through a vehicle-mounted control network.
With reference to the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, where the method further includes:
the transmission control unit TCU acquires the rotation speed of an engine and the rotation speed of an input shaft of a transmission, and compares the rotation speed of the engine with the rotation speed of the input shaft of the transmission;
and when the engine rotating speed is greater than the gearbox input rotating speed, the gearbox control unit TCU stops sending the torque reduction request to the engine control unit ECU.
With reference to the fourth possible implementation manner of the first aspect, the embodiment of the present invention provides a fifth possible implementation manner of the first aspect, where the obtaining of the engine speed by the transmission control unit TCU includes:
the engine control unit ECU acquires the rotating speed of the motor and sends the rotating speed of the motor to the transmission control unit TCU;
and the transmission control unit TCU receives the motor rotating speed sent by the engine control unit ECU.
In a second aspect, an embodiment of the present invention further provides a system for preventing a vehicle from generating a shock, which is applied to an automatic transmission including an engine control unit ECU and a transmission control unit TCU, and includes:
the accelerator signal acquisition module is used for acquiring an accelerator stepping signal by the engine control unit ECU when the accelerator of the vehicle is stepped on and sending the accelerator stepping signal to the transmission control unit TCU
The torque reduction request sending module is used for sending a torque reduction request to the engine control unit ECU by the transmission control unit TCU according to the accelerator stepping signal;
and the torque control module is used for controlling the engine to reduce the torque according to the torque reduction request by the engine control unit ECU.
With reference to the second aspect, an embodiment of the present invention provides a first possible implementation manner of the second aspect, where the throttle signal acquiring module includes:
the system comprises an accelerator signal acquisition unit, an Engine Control Unit (ECU) and a control unit, wherein the accelerator signal acquisition unit is used for acquiring an accelerator pedal signal when an accelerator of a vehicle is stepped on and acquiring the accelerator stepping signal according to the accelerator pedal signal;
and the accelerator signal sending unit is used for sending the accelerator treading signal to the transmission control unit TCU by the engine control unit ECU.
In combination with the second aspect, the present embodiments provide a second possible implementation manner of the second aspect, wherein the torque control module includes;
a first torque control unit for controlling the engine to reduce the oil amount according to the torque reduction request by the engine control unit ECU;
the second torque control unit is used for controlling the engine to reduce the air quantity according to the torque reduction request by the engine control unit ECU;
and the third torque control unit is used for controlling the engine to reduce the ignition advance angle by the engine control unit ECU according to the torque reduction request.
With reference to the second aspect, an embodiment of the present invention provides a third possible implementation manner of the second aspect, wherein the torque down request sending module is further configured to send the accelerator press-down signal to the transmission control unit TCU through an onboard control network by the engine control unit ECU.
The embodiment of the invention has the following beneficial effects:
the embodiment of the invention provides a method and a system for preventing a vehicle from generating impact, which are applied to an automatic transmission, wherein the automatic transmission comprises an engine control unit ECU and a gearbox control unit TCU, and the method comprises the following steps: when the accelerator of the vehicle is stepped on, the engine control unit ECU acquires an accelerator stepping signal and sends the accelerator stepping signal to the transmission control unit TCU; the transmission control unit TCU sends a torque reduction request to an engine control unit ECU according to an accelerator stepping signal; the engine control unit ECU controls the engine to reduce the torque according to the torque reduction request. When the vehicle is under the working condition from no accelerator to the accelerator, the invention reduces the torque of the engine at the moment, thereby relieving the impact generated by suddenly stepping on the accelerator and improving the driving comfort.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flowchart of a method for preventing vehicle impact according to an embodiment of the present invention;
FIG. 2 is a flow chart of another method for preventing vehicle impact according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a system for preventing vehicle impact according to an embodiment of the present invention;
fig. 4 is a schematic diagram of another system for preventing vehicle from generating impact according to an embodiment of the present invention.
Icon:
10-a throttle signal acquisition module; 20-torque-down request sending module; 30-a torque control module; 40-a first airflow channel; 50-a first torque control unit; 60-a second torque control unit; 70-third torque control unit.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. 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 invention.
The current vehicle can not avoid the impact generated by suddenly stepping on the accelerator, thereby influencing the driving comfort of the whole vehicle. Based on the above, the method and the system for preventing the vehicle from generating the impact can relieve the impact generated by suddenly stepping on the accelerator and improve the driving comfort.
For the convenience of understanding the present embodiment, a method for preventing a vehicle from generating an impact according to the present embodiment will be described in detail.
The first embodiment is as follows:
fig. 1 shows a flowchart of a method for preventing a vehicle from generating an impact according to the present embodiment.
As shown in fig. 1, the method for preventing a vehicle from generating a shock of the present embodiment is applied to an automatic Transmission including an engine Control Unit ECU (Electronic Control Unit) and a Transmission Control Unit TCU (Transmission Control Unit), and includes the following steps:
step S101, when the accelerator of a vehicle is stepped on, an engine control unit ECU acquires an accelerator stepping signal and sends the accelerator stepping signal to a transmission control unit TCU;
step S102, the transmission control unit TCU sends a torque reduction request to an engine control unit ECU according to an accelerator stepping signal;
in step S103, the engine control unit ECU controls the engine to reduce the torque according to the torque reduction request.
Under the working condition that the vehicle is from an accelerator to a non-accelerator, the transmission control unit TCU sends a torque reduction request to the engine control unit ECU to limit the over-fast rise of the rotating speed and the torque of the engine, relieve the impact on the whole vehicle caused by sudden power and reach the acceptable range of a human body.
Step S101 includes the following processes:
when the accelerator of the vehicle is stepped on, the engine control unit ECU acquires an accelerator pedal signal, obtains an accelerator stepping signal according to the accelerator pedal signal, and sends the accelerator stepping signal to the transmission control unit TCU.
Step S103 can be implemented in the following manner:
the engine control unit ECU controls the engine to reduce the oil quantity according to the torque reduction request; or the ECU controls the engine to reduce the air quantity according to the torque reduction request;
the engine power can be reduced by reducing the oil supply amount and the air supply amount of the engine, so that the torque of the engine is reduced.
Alternatively, the engine control unit ECU controls the engine to decrease the spark advance angle to decrease the torque according to the torque decrease request.
When an engine (gasoline engine) works, the ignition moment has great influence on the working performance of the engine. Pre-ignition is the spark plug sparking before the piston reaches compression top dead center, igniting the combustible mixture in the combustion chamber. The angle through which the crankshaft rotates during the period from the time of ignition until the piston reaches compression top dead center is referred to as the spark advance angle. The principle of reducing the engine torque by reducing the spark advance angle is as follows: decreasing the spark advance angle may increase exhaust temperature, resulting in a decrease in power, thereby decreasing engine torque.
Specifically, the engine control unit ECU sends an accelerator depression signal to the transmission control unit TCU through the onboard control network.
Further, after executing step S103, the following steps are also executed:
step S104, a transmission control unit TCU acquires the rotation speed of an engine and the rotation speed of an input shaft of a transmission, and compares the rotation speed of the engine with the rotation speed of the input shaft of the transmission;
in step S105, when the engine speed is greater than the transmission input speed, the transmission control unit TCU stops sending the torque down request to the engine control unit ECU.
When the rotating speed of the engine exceeds the rotating speed of the input shaft of the gearbox, no impact is generated, so that the torque reduction request of the engine is stopped, sufficient dynamic performance is guaranteed to be provided for the vehicle, torque reduction control is achieved, and the impact feeling is relieved on the premise that the dynamic performance is guaranteed.
Specifically, the transmission control unit TCU obtains the engine speed by: the engine control unit ECU acquires the rotating speed of the motor and sends the rotating speed of the motor to the transmission control unit TCU; the transmission control unit TCU receives the motor speed sent by the engine control unit ECU.
Example two:
fig. 3 is a schematic diagram illustrating a system for preventing a vehicle from generating an impact according to an embodiment of the present invention.
As shown in fig. 3, the system for preventing a vehicle from generating an impact according to the present embodiment is applied to an automatic transmission, the automatic transmission includes an engine control unit ECU and a transmission control unit TCU, and the system includes a throttle signal acquiring module 10, a throttle signal acquiring module 20, and a throttle signal acquiring module 30;
the accelerator signal acquisition module 10 is used for acquiring an accelerator stepping signal by the engine control unit ECU when the accelerator of the vehicle is stepped on, and sending the accelerator stepping signal to the transmission control unit TCU
The torque reduction request sending module 20 is used for the transmission control unit TCU to send a torque reduction request to the engine control unit ECU according to the accelerator stepping signal;
and a torque control module 30 for controlling the engine to reduce the torque according to the torque reduction request by the engine control unit ECU.
Further, the throttle signal acquiring module 10 includes a throttle signal acquiring unit and a throttle signal acquiring unit;
the system comprises an accelerator signal acquisition unit, an Engine Control Unit (ECU) and a control unit, wherein the accelerator signal acquisition unit is used for acquiring an accelerator pedal signal when the accelerator of the vehicle is stepped on and acquiring an accelerator stepping signal according to the accelerator pedal signal;
and the accelerator signal acquisition unit is used for sending an accelerator treading signal to the transmission control unit TCU by the engine control unit ECU.
Further, the torque control module 30 includes a first torque control unit 31, a second torque control unit 32, a third torque control unit 33;
a first torque control unit 31 for the engine control unit ECU to control the engine to reduce the oil amount according to the torque reduction request;
the second torque control unit 32 is used for controlling the engine to reduce the air quantity according to the torque reducing request by the engine control unit ECU;
and a third torque control unit 33 for the engine control unit ECU to control the engine to decrease the spark advance angle according to the torque decrease request.
Specifically, the torque-down request sending module is further used for sending an accelerator pedal signal to the transmission control unit TCU by the engine control unit ECU through the vehicle-mounted control network.
The system for preventing the vehicle from generating the impact provided by the embodiment of the invention has the same technical characteristics as the method for preventing the vehicle from generating the impact provided by the embodiment, so the same technical problems can be solved, and the same technical effects are achieved.
The embodiment provides a method and a system for preventing a vehicle from generating impact, which are applied to an automatic transmission, wherein the automatic transmission comprises an engine control unit ECU and a transmission control unit TCU, and the method comprises the following steps: when the accelerator of the vehicle is stepped on, the engine control unit ECU acquires an accelerator stepping signal and sends the accelerator stepping signal to the transmission control unit TCU; the transmission control unit TCU sends a torque reduction request to an engine control unit ECU according to an accelerator stepping signal; the engine control unit ECU controls the engine to reduce the torque according to the torque reduction request. When the vehicle is under the working condition from no accelerator to the accelerator, the invention reduces the torque of the engine at the moment, thereby relieving the impact generated by suddenly stepping on the accelerator and improving the driving comfort.
The embodiment of the invention further provides an electronic device, which comprises a memory and a processor, wherein a computer program capable of running on the processor is stored in the memory, and the processor executes the computer program to realize the steps of the method for preventing the vehicle from generating the impact provided by the embodiment.
The embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the method for preventing a vehicle from generating an impact according to the above embodiment are executed.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The computer program product for performing the method for preventing the vehicle from generating the impact according to the embodiment of the present invention includes a computer readable storage medium storing a non-volatile program code executable by a processor, where instructions included in the program code may be used to perform the method described in the foregoing method embodiment, and specific implementation may refer to the method embodiment, and will not be described herein again.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A method of preventing a vehicle from generating a shock, applied to an automatic transmission including an engine control unit ECU and a transmission control unit TCU, the method comprising:
when the accelerator of a vehicle is stepped on, the engine control unit ECU acquires an accelerator stepping signal and sends the accelerator stepping signal to the transmission control unit TCU;
the transmission control unit TCU sends a torque reduction request to the engine control unit ECU according to the accelerator stepping signal;
and the engine control unit ECU controls the engine to reduce the torque according to the torque reduction request.
2. The method for preventing vehicle from generating impact according to claim 1, wherein when the vehicle accelerator is pressed, the engine control unit ECU obtains an accelerator press-on signal and sends the accelerator press-on signal to a transmission control unit TCU, and the method comprises the following steps:
when an accelerator of a vehicle is stepped on, an Engine Control Unit (ECU) acquires an accelerator pedal signal and obtains the accelerator stepping signal according to the accelerator pedal signal;
and the engine control unit ECU sends the accelerator stepping signal to the transmission control unit TCU.
3. The method for preventing a vehicle from generating a shock according to claim 1, wherein the engine control unit ECU controls the engine to lower torque according to the torque-down request, including:
the engine control unit ECU controls the engine to reduce the oil quantity according to the torque reduction request;
or,
the engine control unit ECU controls the engine to reduce the air quantity according to the torque reduction request;
or,
and the engine control unit ECU controls the engine to reduce the ignition advance angle according to the torque reduction request.
4. The method for preventing vehicle from generating impact according to claim 1, wherein the engine control unit ECU sends the throttle depression signal to the transmission control unit TCU, including:
and the engine control unit ECU sends the accelerator stepping signal to the transmission control unit TCU through a vehicle-mounted control network.
5. The method for preventing a shock from being generated in a vehicle according to claim 1, further comprising:
the transmission control unit TCU acquires the rotation speed of an engine and the rotation speed of an input shaft of a transmission, and compares the rotation speed of the engine with the rotation speed of the input shaft of the transmission;
and when the engine rotating speed is greater than the gearbox input rotating speed, the gearbox control unit TCU stops sending the torque reduction request to the engine control unit ECU.
6. The method for preventing vehicle from generating impact according to claim 5, wherein the transmission control unit TCU obtains an engine speed comprising:
the engine control unit ECU acquires the rotating speed of the motor and sends the rotating speed of the motor to the transmission control unit TCU;
and the transmission control unit TCU receives the motor rotating speed sent by the engine control unit ECU.
7. A system for preventing vehicle from generating shock, which is applied to an automatic transmission including an Engine Control Unit (ECU) and a Transmission Control Unit (TCU), the system comprising:
the accelerator signal acquisition module is used for acquiring an accelerator stepping signal by the engine control unit ECU when the accelerator of the vehicle is stepped on and sending the accelerator stepping signal to the transmission control unit TCU
The torque reduction request sending module is used for sending a torque reduction request to the engine control unit ECU by the transmission control unit TCU according to the accelerator stepping signal;
and the torque control module is used for controlling the engine to reduce the torque according to the torque reduction request by the engine control unit ECU.
8. The system for preventing vehicle impact as claimed in claim 7, wherein the throttle signal acquiring module comprises:
the system comprises an accelerator signal acquisition unit, an Engine Control Unit (ECU) and a control unit, wherein the accelerator signal acquisition unit is used for acquiring an accelerator pedal signal when an accelerator of a vehicle is stepped on and acquiring the accelerator stepping signal according to the accelerator pedal signal;
and the accelerator signal sending unit is used for sending the accelerator treading signal to the transmission control unit TCU by the engine control unit ECU.
9. The system for preventing vehicle impact according to claim 7, wherein the torque control module includes;
a first torque control unit for controlling the engine to reduce the oil amount according to the torque reduction request by the engine control unit ECU;
the second torque control unit is used for controlling the engine to reduce the air quantity according to the torque reduction request by the engine control unit ECU;
and the third torque control unit is used for controlling the engine to reduce the ignition advance angle by the engine control unit ECU according to the torque reduction request.
10. The system for preventing vehicle from generating impact according to claim 7, wherein the torque-down request sending module is further used for the engine control unit ECU to send the throttle-down signal to the transmission control unit TCU through an on-board control network.
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| CN201711499553.6A CN108189831A (en) | 2017-12-30 | 2017-12-30 | Prevent vehicle from generating the method and system of impact |
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| CN201711499553.6A CN108189831A (en) | 2017-12-30 | 2017-12-30 | Prevent vehicle from generating the method and system of impact |
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| CN201711499553.6A Pending CN108189831A (en) | 2017-12-30 | 2017-12-30 | Prevent vehicle from generating the method and system of impact |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109611546A (en) * | 2019-01-24 | 2019-04-12 | 浙江吉利汽车研究院有限公司 | A kind of jerk management system and method for power transmission system of vehicle |
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