CN110905677A - Fuel injection amount control method and equipment - Google Patents
Fuel injection amount control method and equipment Download PDFInfo
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- CN110905677A CN110905677A CN201911266114.XA CN201911266114A CN110905677A CN 110905677 A CN110905677 A CN 110905677A CN 201911266114 A CN201911266114 A CN 201911266114A CN 110905677 A CN110905677 A CN 110905677A
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- 238000002347 injection Methods 0.000 title claims abstract description 209
- 239000007924 injection Substances 0.000 title claims abstract description 209
- 239000000446 fuel Substances 0.000 title claims abstract description 127
- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000007613 environmental effect Effects 0.000 claims abstract description 12
- 230000008859 change Effects 0.000 claims description 37
- 230000001052 transient effect Effects 0.000 claims description 31
- 238000012937 correction Methods 0.000 claims description 15
- 238000012545 processing Methods 0.000 claims description 9
- 239000003921 oil Substances 0.000 description 91
- 238000009448 modified atmosphere packaging Methods 0.000 description 59
- 239000000243 solution Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 238000013461 design Methods 0.000 description 7
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000019837 monoammonium phosphate Nutrition 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/3005—Details not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
- F02D31/001—Electric control of rotation speed
- F02D31/007—Electric control of rotation speed controlling fuel supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/70—Input parameters for engine control said parameters being related to the vehicle exterior
- F02D2200/703—Atmospheric pressure
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The embodiment of the invention provides a method and equipment for controlling the amount of fuel injection, wherein the method comprises the following steps: obtaining the engine speed of an engine and obtaining an ambient pressure value; respectively inputting the engine speed value and the environmental pressure value into a supercharger over-temperature oil mass limit MAP, an over-speed oil mass limit MAP and an over-temperature over-speed oil mass limit MAP, and determining the minimum limited oil injection quantity value in the obtained supercharger over-temperature limited oil injection quantity value, the supercharger over-speed limited oil injection quantity value and the supercharger over-temperature over-speed limited oil injection quantity value as the final oil injection quantity value of the engine; determining the limitation prompt information of the supercharger according to the MAP corresponding to the minimum limitation oil injection quantity value; the corresponding limit prompt information is sent to the display unit to be displayed, the limit fuel injection amount of the supercharger can be determined, and the reason for limiting the supercharger can be accurately positioned, so that a driver is reminded of the reason for limiting the fuel injection amount of the supercharger, driving safety is guaranteed, and user experience is improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of engines, in particular to a method and equipment for controlling the quantity of injected oil.
Background
The turbine is one of the core parts of the turbocharger for the vehicle, and once the turbine is damaged, the running of the vehicle can be influenced. When the rotating speed of the supercharger is too high, the turbine is possibly damaged in an overspeed manner, and the damage to the turbocharger turbine can be caused by the overtemperature in a plateau area.
At present, in the prior art, the fuel injection quantity of an engine is determined according to a supercharger protection MAP by calibrating the supercharger protection pulse spectrum MAP based on the altitude and the engine speed so as to limit the over-temperature and/or over-speed of the supercharger.
However, the inventors found that the prior art has at least the following technical problems: the fuel injection quantity of the engine is determined by only using one supercharger protection MAP, and the condition that the fuel injection quantity limited by the engine is caused by the overtemperature of the supercharger or caused by the overspeed of the supercharger or caused by the overtemperature of the supercharger cannot be determined, so that the corresponding reminding can not be performed on a driver, and the driving safety and the user experience are influenced.
Disclosure of Invention
The embodiment of the invention provides an oil injection amount control method and equipment, which aim to solve the problem that the engine oil injection amount is determined by only using a supercharger to protect MAP, and the problem that the engine oil injection amount limitation is caused by the over-temperature of the supercharger, or the over-speed of the supercharger, or the over-temperature and over-speed of the supercharger, so that a driver cannot be correspondingly reminded.
In a first aspect, an embodiment of the present invention provides an oil injection amount control method, including:
obtaining the engine speed of an engine and obtaining an ambient pressure value;
respectively inputting the engine speed value and the environment pressure value into a supercharger over-temperature oil mass limit MAP, a supercharger overspeed oil mass limit MAP and a supercharger over-temperature overspeed oil mass limit MAP to obtain a supercharger over-temperature limited oil injection quantity value, a supercharger overspeed limited oil injection quantity value and a supercharger over-temperature overspeed limited oil injection quantity value;
determining the minimum limited fuel injection quantity value in the supercharger overtemperature limited fuel injection quantity value, the supercharger overspeed limited fuel injection quantity value and the supercharger overtemperature overspeed limited fuel injection quantity value as the final fuel injection quantity value of the engine;
determining the limitation prompt information of the supercharger according to the MAP corresponding to the minimum limitation oil injection quantity value, wherein the limitation prompt information comprises an overtemperature prompt, an overspeed prompt or an overtemperature overspeed prompt;
and controlling the fuel injection work of the engine according to the final fuel injection quantity value of the engine, and sending the corresponding limit prompt information to a display unit for displaying.
In one possible design, before determining the smallest fuel injection limit value of the supercharger over-temperature-limit fuel injection amount value, the supercharger over-speed-limit fuel injection amount value and the supercharger over-temperature-limit fuel injection amount value as the final fuel injection amount value of the engine, the method further includes: determining the rotating speed change rate of the engine according to the rotating speed value of the engine; inputting the rotating speed change rate and the environmental pressure value into a booster transient oil mass correction MAP to obtain an engine transient change correction oil injection quantity value; and correcting the supercharger over-temperature limited oil injection quantity value, the supercharger over-speed limited oil injection quantity value and the supercharger over-temperature over-speed limited oil injection quantity value respectively according to the engine transient change corrected oil injection quantity value.
In one possible design, the determining a rate of change of speed of the engine based on the engine speed value includes: acquiring the engine speed of the engine at the current moment and the stored engine speed at the previous moment; and determining the ratio of the difference value of the engine speed at the current moment minus the engine speed at the previous moment to the time difference of the two moments as the speed change rate of the engine.
In one possible embodiment, the display unit is a dashboard or a vehicle display.
In one possible design, the obtaining the engine speed of the engine includes: receiving an engine rotating speed value acquired by an engine rotating speed sensor; the acquiring of the ambient pressure value comprises: and receiving an ambient pressure value collected by an ambient pressure sensor.
In a second aspect, an embodiment of the present invention provides an oil injection amount control apparatus, including:
the acquisition module is used for acquiring the engine speed of the engine and acquiring an ambient pressure value;
the MAP input module is used for respectively inputting the engine rotating speed value and the environment pressure value into a supercharger over-temperature oil mass limit MAP, a supercharger overspeed oil mass limit MAP and a supercharger over-temperature overspeed oil mass limit MAP to obtain a supercharger over-temperature limit oil injection quantity value, a supercharger overspeed limit oil injection quantity value and a supercharger over-temperature overspeed limit oil injection quantity value;
the fuel injection quantity determining module is used for determining the minimum limited fuel injection quantity value in the supercharger over-temperature limited fuel injection quantity value, the supercharger over-speed limited fuel injection quantity value and the supercharger over-temperature over-speed limited fuel injection quantity value as the final fuel injection quantity value of the engine;
the prompt information determining module is used for determining the limit prompt information of the supercharger according to the MAP corresponding to the minimum limit fuel injection quantity value, wherein the limit prompt information comprises an overtemperature prompt, an overspeed prompt or an overtemperature overspeed prompt;
the fuel injection quantity control module is used for controlling the fuel injection work of the engine according to the final fuel injection quantity value of the engine;
and the prompt information display module is used for sending the corresponding limit prompt information to the display unit for displaying.
In one possible design, the apparatus further includes:
the transient working condition processing module is used for determining the rotating speed change rate of the engine according to the rotating speed value of the engine; inputting the rotating speed change rate and the environmental pressure value into a booster transient oil mass correction MAP to obtain an engine transient change correction oil injection quantity value; and correcting the supercharger over-temperature limited oil injection quantity value, the supercharger over-speed limited oil injection quantity value and the supercharger over-temperature over-speed limited oil injection quantity value respectively according to the engine transient change corrected oil injection quantity value.
In one possible design, the transient operating condition processing module is further configured to obtain an engine speed of the engine at a current time and a stored engine speed at a previous time; and determining the ratio of the difference value of the engine speed at the current moment minus the engine speed at the previous moment to the time difference of the two moments as the speed change rate of the engine.
In a third aspect, an embodiment of the present invention provides an electronic control unit, including: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executes the computer-executable instructions stored in the memory, such that the at least one processor executes the method for controlling fuel injection amount as set forth in the first aspect and various possible designs of the first aspect.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer executing instruction is stored in the computer-readable storage medium, and when a processor executes the computer executing instruction, the method for controlling an amount of fuel injected according to the first aspect and various possible designs of the first aspect is implemented.
According to the method and the device for controlling the fuel injection quantity, provided by the embodiment of the invention, the ambient pressure value is obtained by obtaining the engine rotating speed of the engine; respectively inputting the engine speed value and the environmental pressure value into a supercharger over-temperature oil mass limit MAP, an over-speed oil mass limit MAP and an over-temperature over-speed oil mass limit MAP, and determining the minimum limited oil injection quantity value in the obtained supercharger over-temperature limited oil injection quantity value, the supercharger over-speed limited oil injection quantity value and the supercharger over-temperature over-speed limited oil injection quantity value as the final oil injection quantity value of the engine; determining the limitation prompt information of the supercharger according to the MAP corresponding to the minimum limitation oil injection quantity value; the corresponding limit prompt information is sent to the display unit to be displayed, the limit fuel injection amount of the supercharger can be determined, and the reason for limiting the supercharger can be accurately positioned, so that a driver is reminded of the reason for limiting the fuel injection amount of the supercharger, driving safety is guaranteed, and user experience is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of an architecture of a fuel injection amount control system according to an embodiment of the present invention;
fig. 2 is a first schematic flow chart of a fuel injection amount control method according to an embodiment of the present invention;
FIG. 3 is an exemplary illustration of a supercharger overspeed limit prompt display provided in accordance with an embodiment of the present invention;
fig. 4 is a second flowchart illustrating a fuel injection amount control method according to an embodiment of the present invention;
FIG. 5 is a first schematic structural diagram of an injection quantity control apparatus according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a second fuel injection amount control apparatus according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a hardware structure of an electronic control unit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious 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.
Fig. 1 is a schematic structural diagram of an injection quantity control system according to an embodiment of the present invention. As shown in fig. 1, the system provided in the present embodiment includes an engine 100, an Electronic Control Unit (ECU) 200, a sensor 300, and a display Unit 400.
ECU200 determines engine 100 fueling based on this one supercharger protection MAP by calibrating a supercharger protection MAP based on altitude and engine speed (collected via sensor 300) to limit supercharger over-temperature and/or over-speed.
And a display unit 400 for displaying status information of the vehicle, such as vehicle speed, remaining oil amount, and the like.
However, only one supercharger protection MAP is used for determining the fuel injection quantity of the engine, and it cannot be determined whether the fuel injection quantity limited by the engine is caused by the over-temperature of the supercharger, or the over-speed of the supercharger, or the over-temperature of the supercharger is caused by the over-speed of the supercharger, so that the corresponding reminding can not be performed on a driver. In order to solve the technical problem, the embodiment provides an oil injection amount control method, three different MAPs, namely, an over-temperature oil amount limit MAP, an over-speed oil amount limit MAP and an over-temperature over-speed oil amount limit MAP, are calibrated in advance to obtain a supercharger over-temperature limited oil injection amount value, a supercharger over-speed limited oil injection amount value and a supercharger over-temperature over-speed limited oil injection amount value, and further determine a final oil injection amount value of an engine and prompt information of supercharger limitation so as to remind a driver of the reason for supercharger limitation, guarantee driving safety and improve user experience. The following examples are given for illustrative purposes.
Fig. 2 is a schematic flow chart of a fuel injection amount control method according to an embodiment of the present invention, where an execution main body of the embodiment may be the ECU in the embodiment shown in fig. 1, and the embodiment is not limited in particular here.
As shown in fig. 2, the method includes:
s201: and acquiring the engine speed of the engine and acquiring an ambient pressure value.
In the embodiment, the engine speed of the engine may be obtained by receiving an engine speed value collected by an engine speed sensor.
The ambient pressure value may be obtained by receiving an ambient pressure value collected by an ambient pressure sensor.
S202: and respectively inputting the engine speed value and the environmental pressure value into the supercharger over-temperature oil mass limit MAP, the supercharger over-speed oil mass limit MAP and the supercharger over-temperature over-speed oil mass limit MAP to obtain a supercharger over-temperature limited oil injection quantity value, a supercharger over-speed limited oil injection quantity value and a supercharger over-temperature over-speed limited oil injection quantity value.
In this embodiment, the supercharger over-temperature oil amount limit MAP is obtained by calibrating the engine speed and the ambient pressure value of the engine according to the fuel injection amount under the supercharger over-temperature limit condition.
The supercharger overspeed oil quantity limiting MAP is obtained by calibrating the engine speed and the environmental pressure value of the engine according to the fuel injection quantity under the supercharger overspeed limiting working condition.
The supercharger over-temperature and over-speed oil quantity limit MAP is obtained by calibrating the engine speed and the environmental pressure value of the engine according to the oil injection quantity under the supercharger over-temperature and over-speed limit working condition.
S203: and determining the minimum limited fuel injection quantity value in the supercharger over-temperature limited fuel injection quantity value, the supercharger over-speed limited fuel injection quantity value and the supercharger over-temperature over-speed limited fuel injection quantity value as the final fuel injection quantity value of the engine.
In the embodiment, the minimum limiting fuel injection quantity value in the supercharger overtemperature limiting fuel injection quantity value, the supercharger overspeed limiting fuel injection quantity value and the supercharger overtemperature overspeed limiting fuel injection quantity value refers to the minimum fuel injection quantity value meeting the supercharger working condition limitation of the current engine. If the actual fuel injection quantity of the engine is larger than the minimum limit fuel injection quantity value, the supercharger can be over-speed and/or over-temperature, and even damage to the supercharger component can be caused.
S204: and determining the limitation prompt information of the supercharger according to the MAP corresponding to the minimum limitation fuel injection quantity value, wherein the limitation prompt information comprises overtemperature, overspeed or overtemperature overspeed.
Specifically, according to the minimum limited fuel injection quantity value, determining a corresponding MAP for outputting the minimum limited fuel injection quantity value in a booster over-temperature fuel quantity limit MAP, a booster over-speed fuel quantity limit MAP and a booster over-temperature over-speed fuel quantity limit MAP; judging the MAP type of the corresponding MAP, and extracting key words in the MAP type information, such as over-temperature, over-speed or over-temperature and over-speed; and generating limit prompt information including over-temperature, over-speed or over-temperature and over-speed according to the keyword.
S205: and controlling the fuel injection work of the engine according to the final fuel injection quantity value of the engine, and sending the corresponding limit prompt information to the display unit for displaying.
In the present embodiment, the display unit is an instrument panel or an in-vehicle display screen.
When the display unit is a vehicle-mounted display screen, the display paradigm can refer to fig. 3. Fig. 3 is a diagram illustrating an example of a supercharger overspeed limit prompt provided in an embodiment of the present invention.
As can be seen from the description of the present embodiment, the present embodiment obtains the ambient pressure value by obtaining the engine speed of the engine; respectively inputting the engine speed value and the environmental pressure value into a supercharger over-temperature oil mass limit MAP, an over-speed oil mass limit MAP and an over-temperature over-speed oil mass limit MAP, and determining the minimum limited oil injection quantity value in the obtained supercharger over-temperature limited oil injection quantity value, the supercharger over-speed limited oil injection quantity value and the supercharger over-temperature over-speed limited oil injection quantity value as the final oil injection quantity value of the engine; determining the limitation prompt information of the supercharger according to the MAP corresponding to the minimum limitation oil injection quantity value; the corresponding limit prompt information is sent to the display unit to be displayed, the limit fuel injection amount of the supercharger can be determined, and the reason for limiting the supercharger can be accurately positioned, so that a driver is reminded of the reason for limiting the fuel injection amount of the supercharger, driving safety is guaranteed, and user experience is improved.
Because the booster over-temperature oil mass limit MAP, the booster over-speed oil mass limit MAP and the booster over-temperature over-speed oil mass limit MAP based on stable calibration do not consider the condition that the engine has transient working conditions (such as sudden speed increase or speed reduction of the engine), the fuel injection mass limit based on stable calibrated MAP output is too strict, and the power performance of the engine is reduced.
Fig. 4 is a schematic flow chart of a fuel injection amount control method according to an embodiment of the present invention, and this embodiment further solves the problem that the power performance of the engine is reduced due to too severe fuel injection amount limitation of the engine based on the stably calibrated MAP output based on the embodiment of fig. 2. As shown in fig. 3, before step S203, the method may further include:
s401: and determining the speed change rate of the engine according to the engine speed value.
In the embodiment, the engine speed at the current moment of the engine and the stored engine speed at the last moment are obtained; and determining the ratio of the difference value of the engine speed at the current moment minus the engine speed at the previous moment to the time difference of the two moments as the speed change rate of the engine.
E.g. at the current t1At the moment when the engine speed is V1At t1Last moment t2At an engine speed of V2Then rate of change of engine speed
S402: and inputting the rotating speed change rate and the environmental pressure value into the transient oil mass correction MAP of the supercharger to obtain the transient change correction oil injection quantity value of the engine.
In this embodiment, the transient oil amount correction MAP of the supercharger may be obtained by calibrating a rotation speed change rate and an ambient pressure value of the engine according to a change of an oil injection amount under an engine speed increasing or decreasing condition.
S403: and correcting the fuel injection quantity value according to the transient change of the engine, wherein the fuel injection quantity value is limited by the overtemperature of the supercharger, the fuel injection quantity value is limited by the overspeed of the supercharger and the fuel injection quantity value is limited by the overtemperature and the overspeed of the supercharger.
In the embodiment, the transient variation corrected fuel injection quantity value of the engine is respectively added with the supercharger over-temperature limited fuel injection quantity value, the supercharger overspeed limited fuel injection quantity value and the supercharger over-temperature and over-speed limited fuel injection quantity value to obtain the corrected supercharger over-temperature limited fuel injection quantity value, the supercharger overspeed limited fuel injection quantity value and the supercharger over-temperature and over-speed limited fuel injection quantity value.
S404: and determining the minimum limited fuel injection quantity value in the corrected supercharger over-temperature limited fuel injection quantity value, supercharger over-speed limited fuel injection quantity value and supercharger over-temperature over-speed limited fuel injection quantity value as the final fuel injection quantity value of the engine.
The description of the embodiment shows that the transient oil quantity correction MAP of the supercharger is input into the speed change rate and the ambient pressure value to obtain the transient change correction oil injection quantity value of the engine, and the minimum limit oil injection quantity value of the super-temperature limit oil injection quantity value of the supercharger, the super-speed limit oil injection quantity value of the supercharger and the super-temperature and super-speed limit oil injection quantity value of the supercharger is corrected, so that the power performance of the engine under the transient working condition of the engine can be improved.
Fig. 5 is a first schematic structural diagram of an injection quantity control apparatus according to an embodiment of the present invention. As shown in fig. 5, the injection amount control apparatus 50 includes: the fuel injection control system comprises an acquisition module 501, a MAP input module 502, a fuel injection amount determination module 503, a prompt information determination module 504, a fuel injection amount control module 505 and a prompt information display module 506.
The acquiring module 501 is used for acquiring the engine speed of the engine and acquiring an ambient pressure value;
the MAP input module 502 is used for respectively inputting the engine speed value and the environment pressure value into a supercharger over-temperature oil mass limit MAP, a supercharger overspeed oil mass limit MAP and a supercharger over-temperature and overspeed oil mass limit MAP to obtain a supercharger over-temperature limit oil injection quantity value, a supercharger overspeed limit oil injection quantity value and a supercharger over-temperature and overspeed limit oil injection quantity value;
the fuel injection quantity determining module 503 is configured to determine the smallest limited fuel injection quantity value among the supercharger over-temperature limited fuel injection quantity value, the supercharger over-speed limited fuel injection quantity value, and the supercharger over-temperature over-speed limited fuel injection quantity value as a final fuel injection quantity value of the engine;
a prompt information determination module 504, configured to determine, according to the MAP corresponding to the minimum limited fuel injection quantity value, a supercharger limitation prompt information, where the limitation prompt information includes an over-temperature prompt, an over-speed prompt, or an over-temperature over-speed prompt;
the fuel injection amount control module 505 is used for controlling the fuel injection work of the engine according to the final fuel injection amount value of the engine;
and a prompt information display module 506, configured to send the corresponding limitation prompt information to the display unit for display.
The device provided in this embodiment may be used to implement the technical solution of the above method embodiment, and the implementation principle and technical effect are similar, which are not described herein again.
Fig. 6 is a schematic structural diagram of a fuel injection amount control apparatus according to an embodiment of the present invention. As shown in fig. 6, this embodiment further includes, on the basis of the embodiment in fig. 5: and a transient condition processing module 507.
The transient working condition processing module 507 is used for determining the rotating speed change rate of the engine according to the rotating speed value of the engine; inputting the rotating speed change rate and the environmental pressure value into a booster transient oil mass correction MAP to obtain an engine transient change correction oil injection quantity value; and correcting the supercharger over-temperature limited oil injection quantity value, the supercharger over-speed limited oil injection quantity value and the supercharger over-temperature over-speed limited oil injection quantity value respectively according to the engine transient change corrected oil injection quantity value.
In an embodiment of the present invention, the transient condition processing module 507 is further configured to obtain an engine speed of the engine at a current time and a stored engine speed at a previous time;
and determining the ratio of the difference value of the engine speed at the current moment minus the engine speed at the previous moment to the time difference of the two moments as the speed change rate of the engine.
In an embodiment of the present invention, the obtaining module 501 is specifically configured to receive an engine speed value acquired by an engine speed sensor; and receiving an ambient pressure value collected by an ambient pressure sensor.
The device provided in this embodiment may be used to implement the technical solution of the above method embodiment, and the implementation principle and technical effect are similar, which are not described herein again.
Fig. 7 is a schematic diagram of a hardware structure of an electronic control unit according to an embodiment of the present invention. As shown in fig. 7, the fuel injection amount control apparatus 70 of the present embodiment includes: a processor 701 and a memory 702; wherein
A memory 702 for storing computer-executable instructions;
the processor 701 is configured to execute the computer-executable instructions stored in the memory to implement the steps performed in the above-described method embodiments. Reference may be made in particular to the description relating to the method embodiments described above.
Alternatively, the memory 702 may be separate or integrated with the processor 701.
When the memory 702 is independently provided, the fuel injection amount control apparatus further includes a bus 703 for connecting the memory 702 and the processor 701.
The embodiment of the invention also provides a computer readable storage medium, wherein a computer execution instruction is stored in the computer readable storage medium, and when a processor executes the computer execution instruction, the fuel injection amount control method is realized.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the modules is only one logical division, and other divisions may be realized in practice, for example, a plurality of modules 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 through some interfaces, devices or modules, and may be in an electrical, mechanical or other form.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules 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 modules may be selected according to actual needs to implement the solution of the present embodiment.
In addition, functional modules in the embodiments of the present invention may be integrated into one processing unit, or each module may exist alone physically, or two or more modules are integrated into one unit. The unit formed by the modules can be realized in a hardware form, and can also be realized in a form of hardware and a software functional unit.
The integrated module implemented in the form of a software functional module may be stored in a computer-readable storage medium. The software functional module is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) or a processor to execute some steps of the methods described in the embodiments of the present application.
It should be understood that the Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor, or in a combination of the hardware and software modules within the processor.
The memory may comprise a high-speed RAM memory, and may further comprise a non-volatile storage NVM, such as at least one disk memory, and may also be a usb disk, a removable hard disk, a read-only memory, a magnetic or optical disk, etc.
The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (Extended Industry Standard Architecture) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, the buses in the figures of the present application are not limited to only one bus or one type of bus.
The storage medium may be implemented by any type or combination of volatile or non-volatile memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an Application Specific Integrated Circuits (ASIC). Of course, the processor and the storage medium may reside as discrete components in an electronic device or host device.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A fuel injection amount control method characterized by comprising:
obtaining the engine speed of an engine and obtaining an ambient pressure value;
respectively inputting the engine speed value and the environment pressure value into a supercharger over-temperature oil mass limit MAP, a supercharger overspeed oil mass limit MAP and a supercharger over-temperature overspeed oil mass limit MAP to obtain a supercharger over-temperature limited oil injection quantity value, a supercharger overspeed limited oil injection quantity value and a supercharger over-temperature overspeed limited oil injection quantity value;
determining the minimum limited fuel injection quantity value in the supercharger overtemperature limited fuel injection quantity value, the supercharger overspeed limited fuel injection quantity value and the supercharger overtemperature overspeed limited fuel injection quantity value as the final fuel injection quantity value of the engine;
determining the limitation prompt information of the supercharger according to the MAP corresponding to the minimum limitation oil injection quantity value, wherein the limitation prompt information comprises an overtemperature prompt, an overspeed prompt or an overtemperature overspeed prompt;
and controlling the fuel injection work of the engine according to the final fuel injection quantity value of the engine, and sending the corresponding limit prompt information to a display unit for displaying.
2. The method of claim 1, wherein prior to determining a minimum fuel injection quantity limit value of said booster over-temperature limit fuel injection quantity value, booster over-speed limit fuel injection quantity value, and booster over-temperature limit fuel injection quantity value as a final fuel injection quantity value for the engine, further comprising:
determining the rotating speed change rate of the engine according to the rotating speed value of the engine;
inputting the rotating speed change rate and the environmental pressure value into a booster transient oil mass correction MAP to obtain an engine transient change correction oil injection quantity value;
and correcting the supercharger over-temperature limited oil injection quantity value, the supercharger over-speed limited oil injection quantity value and the supercharger over-temperature over-speed limited oil injection quantity value respectively according to the engine transient change corrected oil injection quantity value.
3. The method of claim 2, wherein said determining a rate of change of engine speed from said engine speed value comprises:
acquiring the engine speed of the engine at the current moment and the stored engine speed at the previous moment;
and determining the ratio of the difference value of the engine speed at the current moment minus the engine speed at the previous moment to the time difference of the two moments as the speed change rate of the engine.
4. The method of claim 1, wherein the display unit is an instrument panel or an in-vehicle display screen.
5. The method of any one of claims 1-4, wherein said obtaining an engine speed of an engine comprises:
receiving an engine rotating speed value acquired by an engine rotating speed sensor;
the acquiring of the ambient pressure value comprises:
and receiving an ambient pressure value collected by an ambient pressure sensor.
6. An injection quantity control apparatus characterized by comprising:
the acquisition module is used for acquiring the engine speed of the engine and acquiring an ambient pressure value;
the MAP input module is used for respectively inputting the engine rotating speed value and the environment pressure value into a supercharger over-temperature oil mass limit MAP, a supercharger overspeed oil mass limit MAP and a supercharger over-temperature overspeed oil mass limit MAP to obtain a supercharger over-temperature limit oil injection quantity value, a supercharger overspeed limit oil injection quantity value and a supercharger over-temperature overspeed limit oil injection quantity value;
the fuel injection quantity determining module is used for determining the minimum limited fuel injection quantity value in the supercharger over-temperature limited fuel injection quantity value, the supercharger over-speed limited fuel injection quantity value and the supercharger over-temperature over-speed limited fuel injection quantity value as the final fuel injection quantity value of the engine;
the prompt information determining module is used for determining the limit prompt information of the supercharger according to the MAP corresponding to the minimum limit fuel injection quantity value, wherein the limit prompt information comprises an overtemperature prompt, an overspeed prompt or an overtemperature overspeed prompt;
the fuel injection quantity control module is used for controlling the fuel injection work of the engine according to the final fuel injection quantity value of the engine;
and the prompt information display module is used for sending the corresponding limit prompt information to the display unit for displaying.
7. The apparatus of claim 6, further comprising:
the transient working condition processing module is used for determining the rotating speed change rate of the engine according to the rotating speed value of the engine; inputting the rotating speed change rate and the environmental pressure value into a booster transient oil mass correction MAP to obtain an engine transient change correction oil injection quantity value; and correcting the supercharger over-temperature limited oil injection quantity value, the supercharger over-speed limited oil injection quantity value and the supercharger over-temperature over-speed limited oil injection quantity value respectively according to the engine transient change corrected oil injection quantity value.
8. The apparatus of claim 7,
the transient working condition processing module is also used for acquiring the engine speed of the engine at the current moment and the stored engine speed at the previous moment; and determining the ratio of the difference value of the engine speed at the current moment minus the engine speed at the previous moment to the time difference of the two moments as the speed change rate of the engine.
9. An electronic control unit, comprising: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executes computer-executable instructions stored in the memory to cause the at least one processor to perform the fuel injection control method of any of claims 1 to 5.
10. A computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, the method for controlling fuel injection amount according to any one of claims 1 to 5 is implemented.
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