CN113123887A - Method and device for determining braking torque of automobile and computer storage medium - Google Patents
Method and device for determining braking torque of automobile and computer storage medium Download PDFInfo
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- CN113123887A CN113123887A CN202110480673.1A CN202110480673A CN113123887A CN 113123887 A CN113123887 A CN 113123887A CN 202110480673 A CN202110480673 A CN 202110480673A CN 113123887 A CN113123887 A CN 113123887A
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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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
- F02D41/029—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a particulate filter
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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
- 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, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
- B60W30/18—Propelling the vehicle
- B60W30/18009—Propelling the vehicle related to particular drive situations
- B60W30/18109—Braking
Abstract
The embodiment of the application discloses a method and a device for determining braking torque of an automobile and a computer storage medium, and belongs to the technical field of vehicle engineering. The method comprises the following steps: when a braking instruction is received, acquiring the carbon loading and a first torque of a particulate matter trap (GPF) in the automobile, wherein the first torque is the torque of the engine of the automobile for safe operation in the GPF active regeneration process; when the carbon loading is larger than or equal to the carbon loading threshold, acquiring a second torque according to the rotating speed of the automobile engine; determining a minimum torque of the first and second torques as a braking torque of the vehicle, the braking torque for limiting a temperature of the GPF during regeneration. According to the embodiment of the application, when the carbon capacity of the GPF exceeds the carbon capacity threshold, the braking torque of the automobile can be limited again, so that the possibility of burning the GPF under the condition of high carbon capacity is reduced, and the safety of the GPF and an engine is further protected.
Description
Technical Field
The embodiment of the application relates to the technical field of vehicle engineering, in particular to a method and a device for determining braking torque of an automobile and a computer storage medium.
Background
With the social development, automobiles have gradually become vehicles essential for people to travel, and with the increase of the number of automobiles, the pollution of the exhaust emission of the automobiles to the environment is more and more serious, so in order to reduce the pollution to the environment and enable the exhaust emission of the automobiles to meet the national laws and regulations, a particle trap (GPF) can be added to a Gasoline engine emission treatment system of the automobiles. Particulate emissions can be reduced by the GPF. After the automobile carrying the GPF runs for a certain time, a certain amount of carbon capacity is accumulated in the GPF, and when the carbon capacity is accumulated to a certain degree, the GPF starts active regeneration operation. If the GPF is operating regeneratively during coasting or ESP activation or shifting, the GPF itself will increase in temperature, and therefore engine torque can be controlled to avoid the GPF temperature exceeding the tolerance temperature.
At present, when a braking instruction is received in the GPF active regeneration process, the braking pedal required torque can be obtained, and a first torque can be further determined from the braking pedal required torque, the cruise required torque, the active speed limiting torque, the ESP torque increasing, the ESP torque reducing, the gearbox torque increasing and limiting and the like, wherein the first torque can protect an engine.
However, since a large amount of carbon particles have been accumulated in GPF, the carbon particles will be burned during the regeneration process, and the temperature generated by the combustion of the carbon load in a short time will cause the GPF to burn out, thereby bringing about a safety hazard.
Disclosure of Invention
The embodiment of the application provides a method and a device for determining the braking torque of an automobile and a computer storage medium, which can be used for solving the problems that in the related art, the GPF is burnt due to overhigh temperature in the GPF regeneration process, and the potential safety hazard exists in an engine. The technical scheme is as follows:
in one aspect, there is provided a braking torque determination method of an automobile, the method including:
when a braking instruction is received, acquiring the carbon loading and a first torque of a particulate matter trap (GPF) in the automobile, wherein the first torque is the torque of the engine of the automobile for safe operation in the GPF active regeneration process;
when the carbon loading is larger than or equal to the carbon loading threshold, acquiring a second torque according to the rotating speed of the automobile engine;
determining a minimum torque of the first and second torques as a braking torque of the vehicle, the braking torque for limiting a temperature of the GPF during regeneration.
In one embodiment, after acquiring the carbon load and the first torque in a particle trap GPF of the automobile when a braking command is received, the method further comprises the following steps:
acquiring the current temperature and ash content of the GPF;
and determining a corresponding carbon loading threshold from a corresponding relation table among the temperature, the ash content and the threshold according to the current temperature and the ash content of the GPF.
In one embodiment, the obtaining a second torque according to a rotation speed of the vehicle engine when the carbon loading is greater than or equal to a carbon loading threshold includes:
when the carbon loading capacity is larger than or equal to the carbon loading capacity threshold, acquiring the current rotating speed of the engine through a rotating speed sensor arranged on a flywheel disc of the automobile;
acquiring a rotating speed limiting torque corresponding to the rotating speed from a corresponding relation between the rotating speed and the limiting torque;
determining the second torque according to the rotation speed limit torque.
In one embodiment, after acquiring the carbon load and the first torque of a particulate matter trap (GPF) in the automobile when a braking command is received, the method further comprises the following steps:
determining the first torque as a braking torque of the vehicle when the carbon loading of the GPF is less than the carbon loading threshold.
In one embodiment, after determining the minimum torque of the first torque and the second torque as the braking torque of the automobile, the method further includes:
determining the air inflow of the GPF through the braking torque;
and controlling the GPF to carry out regeneration operation according to the air inflow of the GPF.
In another aspect, there is provided a braking torque determination apparatus of an automobile, the apparatus including:
the device comprises a first obtaining module, a second obtaining module and a third obtaining module, wherein the first obtaining module is used for obtaining the carbon loading and a first torque of a particle trap GPF in the automobile when a braking instruction is received, and the first torque is the torque of the engine of the automobile which safely runs in the GPF active regeneration process;
the second acquisition module is used for acquiring a second torque according to the rotating speed of the automobile engine when the carbon loading is greater than or equal to a carbon loading threshold value;
a first determination module to determine a minimum torque of the first and second torques as a braking torque of the vehicle, the braking torque to limit a temperature of the GPF during regeneration.
In one embodiment, the apparatus further comprises:
the third acquisition module is used for acquiring the current temperature and ash content of the GPF;
and the second determining module is used for determining a corresponding carbon loading threshold from a corresponding relation table among the temperature, the ash content and the threshold according to the current temperature and the ash content of the GPF.
In one embodiment, the second obtaining module comprises:
the first obtaining sub-module is used for obtaining the current rotating speed of the engine through a rotating speed sensor arranged on a flywheel disc of the automobile when the carbon loading amount is larger than or equal to the carbon loading amount threshold value;
the second obtaining submodule is used for obtaining the rotating speed limiting torque corresponding to the rotating speed from the corresponding relation between the rotating speed and the limiting torque;
and the determining submodule is used for determining the second torque according to the rotating speed limit torque.
In one embodiment, the apparatus further comprises:
a third determination module to determine the first torque as a braking torque of the vehicle when the carbon load of the GPF is less than the carbon load threshold.
In one embodiment, the apparatus further comprises:
the fourth determining module is used for determining the air inflow of the GPF through the braking torque;
and the control module is used for controlling the GPF to carry out regeneration operation according to the air inflow of the GPF.
In another aspect, a computer readable storage medium is provided, having instructions stored thereon, which when executed by a processor, implement any of the above-mentioned brake torque determination methods for a vehicle.
The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:
in the embodiment of the application, when the carbon loading of the GPF exceeds the carbon loading threshold, the braking torque of the automobile can be limited again, namely, a smaller torque is selected from the first torque and the second torque again to be determined as the braking torque of the automobile, so that the possibility of burning the GPF under the condition of high carbon loading is reduced, and the safety of the GPF and the engine is further protected.
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 are 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 creative efforts.
FIG. 1 is a flow chart of a method for determining a braking torque of a vehicle according to an embodiment of the present disclosure;
FIG. 2 is a flow chart of another method for determining braking torque of a vehicle according to an embodiment of the present application;
FIG. 3 is a schematic structural diagram of a braking torque determining apparatus for a vehicle according to an embodiment of the present disclosure;
FIG. 4 is a schematic structural diagram of another braking torque determining apparatus for a vehicle according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a second obtaining module according to an embodiment of the present disclosure;
FIG. 6 is a schematic structural diagram of another braking torque determining apparatus for a vehicle according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of another braking torque determination device for an automobile according to an embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present application more clear, the embodiments of the present application will be further described in detail with reference to the accompanying drawings.
Before explaining a method for determining a braking torque of an automobile provided by an embodiment of the present application in detail, an application scenario provided by the embodiment of the present application is explained in detail.
As emission regulations for automobiles become more stringent, the emission of engine exhaust from automobiles is more and more restricted, and therefore, to meet the emission regulations for automobiles, GPF can be added to automobiles to reduce the content of particulate matters in the exhaust from automobiles. After an automobile carrying the GPF runs for a certain time, the GPF continuously traps particulate matters, a certain amount of carbon capacity is accumulated in the GPF, and when the carbon capacity is accumulated to a certain degree, the GPF starts active regeneration operation. If the GPF is operating regeneratively during coasting or ESP activation or shifting, the GPF itself will increase in temperature, and therefore engine torque can be controlled to avoid the GPF temperature exceeding the tolerance temperature. However, when the carbon loading of GPF is large, there is a risk that the temperature generated by combustion may exceed the GPF bulk limits during the combustion of carbon particles, and the combustion temperature may not be controlled, which may result in the burning of GPF.
Based on the application scenario, the embodiment of the application provides the method for determining the braking torque of the automobile, which can avoid the situation that the GPF temperature exceeds the body limit value in the carbon particle combustion process and improve the GPF safety.
Fig. 1 is a flowchart of a method for determining a braking torque of an automobile according to an embodiment of the present disclosure, where the method for determining a braking torque of an automobile may include the following steps:
step 101: when a braking command is received, the carbon load of a particulate matter trap (GPF) in the automobile and a first torque are obtained, wherein the first torque is the torque of the engine of the automobile for safely running in the GPF active regeneration process.
Step 102: and when the carbon loading is greater than or equal to the carbon loading threshold, acquiring a second torque according to the rotating speed of the automobile engine.
Step 103: the minimum torque of the first torque and the second torque is determined as a braking torque of the vehicle, which is used to limit the temperature of the GPF during regeneration.
In the embodiment of the application, when the carbon loading of the GPF exceeds the carbon loading threshold, the braking torque of the automobile can be limited again, namely, a smaller torque is selected from the first torque and the second torque again to be determined as the braking torque of the automobile, so that the possibility of burning the GPF under the condition of high carbon loading is reduced, and the safety of the GPF and the engine is further protected.
In one embodiment, after acquiring the carbon load and the first torque in a particle trap GPF of the vehicle when a braking command is received, the method further comprises:
acquiring the current temperature and ash content of the GPF;
and determining a corresponding carbon load threshold from a corresponding relation table among the temperature, the ash content and the threshold according to the current temperature and the ash content of the GPF.
In one embodiment, obtaining a second torque based on a speed of the vehicle engine when the carbon loading is greater than or equal to a carbon loading threshold comprises:
when the carbon loading is greater than or equal to the carbon loading threshold, acquiring the current rotating speed of the engine through a rotating speed sensor arranged on a flywheel disc of the automobile;
acquiring a rotating speed limiting torque corresponding to the rotating speed from a corresponding relation between the rotating speed and the limiting torque;
the second torque is determined based on the speed limit torque.
In one embodiment, after acquiring the carbon load and the first torque of a particulate matter trap (GPF) in the automobile when a braking command is received, the method further comprises the following steps:
when the carbon loading of the GPF is less than the carbon loading threshold, the first torque is determined as the braking torque of the vehicle.
In one embodiment, after determining the minimum torque of the first torque and the second torque as the braking torque of the vehicle, the method further comprises:
determining the air inlet quantity of the GPF through the braking torque;
and controlling the GPF to carry out regeneration operation according to the air inlet quantity of the GPF.
All the above optional technical solutions can be combined arbitrarily to form an optional embodiment of the present application, and the present application embodiment is not described in detail again.
Fig. 2 is a flowchart of a method for determining a braking torque of an automobile according to an embodiment of the present invention, which is illustrated in the embodiment that the method for determining a braking torque of an automobile is applied to an automobile, and the method for determining a braking torque of an automobile may include the following steps:
step 201: when the automobile receives a braking instruction, the carbon load of the GPF in the automobile and a first torque are obtained, wherein the first torque is the torque of the engine of the automobile for safely running in the GPF active regeneration process.
Since the temperature of the GPF may increase with unburned carbon particles of the GPF when a braking command is received during active regeneration of the GPF, which may potentially cause a hazard to the engine, the braking torque of the vehicle is typically controlled to the first torque in order to protect the engine. After the carbon particles in the GPF are combusted, the temperature of the GPF caused by combustion may further threaten the safety of the engine and the GPF, and the engine and the GPF may or may not be protected when the engine is located at the first torque, and whether the engine and the GPF can be protected at the first torque needs to be further determined by the carbon load in the GPF. Therefore, the carbon load and the first torque of the GPF can be obtained when the vehicle receives a braking command.
As an example, the automobile can determine that a braking command is detected when the driver is detected to depress the brake pedal, that is, the braking command is triggered when the driver depresses the brake pedal.
In some embodiments, the vehicle can detect a pressure differential across the front and back of the GPF via a GPF differential pressure sensor, from which the carbon loading of the GPF can be determined.
It should be noted that, the process of determining the GPF carbon loading according to the pressure difference value by the vehicle can refer to the related art, and the embodiment is not described in detail herein.
In some embodiments, the terminal can determine the torque required by the air path according to the braking torque required by the brake pedal, then determine a larger required torque as a third torque from the torque required by the air path and the torque required by the cruise, and then determine a smaller torque as a fourth torque from the third torque and the torque required by the active speed limit; when the ESP needs torque increasing, determining the smaller torque as the fifth torque from the ESP required torque and the fourth torque, and when the ESP needs torque decreasing, determining the larger torque as the fifth torque from the ESP required torque and the fourth torque; then, when the torque of the gearbox needs to be increased, determining a smaller torque as a torque required by a clutch end from the torque required by the gearbox and the fifth torque, and when the torque of the gearbox is limited, determining a larger torque as a torque required by the clutch end from the protective torque of the gearbox and the fifth torque; next, a crankshaft end required torque is determined according to the clutch end required torque, and a minimum torque is determined as a first torque from among a crankshaft section required torque, a part failure restriction torque, a high intake air temperature restriction torque, a restriction torque in an engine failure mode, and a knock retard restriction torque.
The manner in which the vehicle obtains the first torque may be other manners, for example, the first torque is a preset torque, and the vehicle can obtain the first torque from a storage file.
In some embodiments, when the vehicle receives a braking command, after acquiring the carbon load and the first torque in a particulate trap (GPF) in the vehicle, the current temperature and ash content of the GPF can also be acquired; and determining a corresponding carbon load threshold from a corresponding relation table among the temperature, the ash content and the threshold according to the current temperature and the ash content of the GPF.
As an example, an automobile can be equipped with a temperature sensor by which the current temperature of the GPF can be acquired and an ash content detection device by which the current ash content can be acquired.
It should be noted that the correspondence table between the temperature, the ash content, and the threshold value can be set in advance according to the requirement.
Step 202: and when the carbon loading is greater than or equal to the carbon loading threshold, the automobile acquires a second torque according to the rotating speed of the automobile engine.
Since the temperature generated after the GPF burns the carbon particles may damage the engine and the GPF when the carbon loading is greater than or equal to the carbon loading threshold, the vehicle also needs to obtain the second torque according to the rotation speed of the engine.
As an example, the operation of the vehicle to obtain the second torque according to the rotation speed of the vehicle engine when the carbon loading is greater than or equal to the carbon loading threshold value includes at least: when the carbon loading capacity is greater than or equal to the carbon loading capacity threshold value, acquiring the current rotating speed of the engine through a rotating speed sensor arranged on a flywheel disc of the automobile; acquiring a rotating speed limiting torque corresponding to the rotating speed from a corresponding relation between the rotating speed and the limiting torque; the second torque is obtained according to the rotation speed limiting torque.
It should be noted that the carbon loading threshold can be set in advance, for example, the carbon loading threshold is 9 grams, 6 grams, and so on. The rotational speed limiting torque can be a torque threshold value and can also be a torque limiting range.
As an example, when the rotation speed limiting torque is a torque threshold, the torque threshold is determined as the second torque, and when the rotation speed limiting torque is a torque limiting range, the minimum torque in the torque limiting range is determined as the second torque.
In some embodiments, the carbon loading of the GPF may also be less than the carbon loading threshold, and when the carbon loading of the GPF is less than the carbon loading threshold, the temperature generated by the GPF burning the carbon particles may not affect the GPF, and braking according to the first torque may also protect the engine and the GPF, so that the vehicle can determine the first torque as the braking torque of the vehicle.
Step 203: the vehicle determines the smallest of the first and second torques as a braking torque of the vehicle that is used to limit the temperature of the GPF during regeneration.
Since the current carbon loading of the GPF may damage the GPF and the engine after combustion, it is desirable that the engine intake air amount is smaller as well as smaller as well, and the opening of the throttle is related to the braking torque, and the smaller the braking torque, the smaller the opening of the throttle is and the smaller the engine intake air amount is, so that high temperature will not be generated for combustion of carbon particles, and thus, the vehicle can determine the smallest torque of the first torque and the second torque as the braking torque of the vehicle.
In some embodiments, after the vehicle determines the minimum torque of the first torque and the second torque as the braking torque of the vehicle, the vehicle can also determine the air intake amount of the GPF through the braking torque; and controlling the GPF according to the air inflow of the GPF to carry out regeneration operation.
In some embodiments, the vehicle can determine an engine throttle opening based on the braking torque, and control the throttle opening according to the engine throttle opening, thereby achieving the goal of controlling the GPF according to the air intake amount of the GPF for regeneration operation.
In the embodiment of the application, when the automobile receives a braking instruction, the carbon capacity and the first torque of the GPF are obtained, when the carbon capacity of the GPF exceeds the carbon capacity threshold, the braking torque of the automobile can be limited again, namely, a smaller torque is selected from the first torque and the second torque again to be determined as the braking torque of the automobile, and finally a proper air inflow is output, so that the phenomenon that the GPF burns carbon particles at a higher temperature in a short time is avoided, the possibility that the GPF burns out under the condition of high carbon capacity is reduced, and the safety of the GPF and an engine is further protected.
Fig. 3 is a schematic structural diagram of a braking torque determination device of an automobile according to an embodiment of the present disclosure, where the braking torque determination device of the automobile may be implemented by software, hardware, or a combination of the two. The braking torque determination apparatus of the automobile may include: a first obtaining module 301, a second obtaining module 302 and a first determining module 303.
The first obtaining module 301 is configured to obtain a carbon loading and a first torque of a particulate matter trap GPF in the vehicle when a braking instruction is received, where the first torque is a torque at which an engine of the vehicle safely operates in an active regeneration process of the GPF;
the second obtaining module 302 is configured to obtain a second torque according to a rotation speed of the automobile engine when the carbon loading is greater than or equal to a carbon loading threshold;
a first determination module 303 to determine a minimum torque of the first torque and the second torque as a braking torque of the vehicle, the braking torque to limit a temperature of the GPF during regeneration.
In one embodiment, referring to fig. 4, the apparatus further comprises:
a third obtaining module 304, configured to obtain a current temperature and an ash content of the GPF;
a second determining module 305, configured to determine, according to the current temperature and ash content of the GPF, a corresponding carbon loading threshold from a correspondence table between the temperature, the ash content, and the threshold.
In one embodiment, referring to fig. 5, the second obtaining module 302 includes:
a first obtaining submodule 3021 configured to obtain a current rotation speed of the engine through a rotation speed sensor mounted on a flywheel disc of the automobile when the carbon loading is greater than or equal to the carbon loading threshold;
a second obtaining submodule 3022 configured to obtain a rotational speed restriction torque corresponding to the rotational speed from the correspondence relationship between the rotational speed and the restriction torque;
a determination submodule 3023 is used to determine the second torque from within the rotational speed limit torque.
In one embodiment, referring to fig. 6, the apparatus further comprises:
a third determination module 306 to determine the first torque as a braking torque of the vehicle when the carbon load of the GPF is less than the carbon load threshold.
In one embodiment, referring to fig. 7, the apparatus further comprises:
a fourth determining module 307, configured to determine an intake air amount of the GPF according to the braking torque;
and a control module 308 for controlling the GPF to perform the regeneration operation according to the air intake amount of the GPF.
In the embodiment of the application, when the automobile receives a braking instruction, the carbon capacity and the first torque of the GPF are obtained, when the carbon capacity of the GPF exceeds the carbon capacity threshold, the braking torque of the automobile can be limited again, namely, a smaller torque is selected from the first torque and the second torque again to be determined as the braking torque of the automobile, and finally a proper air inflow is output, so that the phenomenon that the GPF burns carbon particles at a higher temperature in a short time is avoided, the possibility that the GPF burns out under the condition of high carbon capacity is reduced, and the safety of the GPF and an engine is further protected.
It should be noted that: the braking torque determining device for an automobile provided in the above embodiment is only illustrated by dividing the functional modules when determining the braking torque of the automobile, and in practical applications, the function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the functions described above. In addition, the brake torque determining apparatus for an automobile provided in the above embodiments and the brake torque determining method embodiment for an automobile belong to the same concept, and specific implementation processes thereof are detailed in the method embodiment and are not described herein again.
The embodiments of the present application also provide a non-transitory computer readable storage medium, wherein when the instructions in the storage medium are executed by a processor of a server, the server is enabled to execute the method for determining the braking torque of the automobile provided by the above embodiments.
Embodiments of the present application also provide a computer program product containing instructions, which when run on a server, cause the server to execute the method for determining a braking torque of a vehicle provided by the above embodiments.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The above description is only a preferred embodiment of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A method of determining a braking torque of a vehicle, the method comprising:
when a braking instruction is received, acquiring the carbon loading and a first torque of a particulate matter trap (GPF) in the automobile, wherein the first torque is the torque of the engine of the automobile for safe operation in the GPF active regeneration process;
when the carbon loading is larger than or equal to the carbon loading threshold, acquiring a second torque according to the rotating speed of the automobile engine;
determining a minimum torque of the first and second torques as a braking torque of the vehicle, the braking torque for limiting a temperature of the GPF during regeneration.
2. The method of claim 1, wherein after obtaining the carbon load and the first torque in a particulate matter trap (GPF) in the vehicle when the braking command is received, further comprising:
acquiring the current temperature and ash content of the GPF;
and determining a corresponding carbon loading threshold from a corresponding relation table among the temperature, the ash content and the threshold according to the current temperature and the ash content of the GPF.
3. The method of claim 1, wherein obtaining a second torque as a function of a speed of the vehicle engine when the carbon loading is greater than or equal to a carbon loading threshold comprises:
when the carbon loading capacity is larger than or equal to the carbon loading capacity threshold, acquiring the current rotating speed of the engine through a rotating speed sensor arranged on a flywheel disc of the automobile;
acquiring a rotating speed limiting torque corresponding to the rotating speed from a corresponding relation between the rotating speed and the limiting torque;
determining the second torque according to the rotation speed limit torque.
4. The method of claim 1, wherein after obtaining the carbon load and the first torque of a particulate matter trap (GPF) in the vehicle when the braking command is received, further comprising:
determining the first torque as a braking torque of the vehicle when the carbon loading of the GPF is less than the carbon loading threshold.
5. The method of claim 1, wherein after determining the smallest of the first torque and the second torque as a braking torque of the vehicle, further comprising:
determining the air inflow of the GPF through the braking torque;
and controlling the GPF to carry out regeneration operation according to the air inflow of the GPF.
6. A brake torque determination apparatus for an automobile, the apparatus comprising:
the device comprises a first obtaining module, a second obtaining module and a third obtaining module, wherein the first obtaining module is used for obtaining the carbon loading and a first torque of a particle trap GPF in the automobile when a braking instruction is received, and the first torque is the torque of the engine of the automobile which safely runs in the GPF active regeneration process;
the second acquisition module is used for acquiring a second torque according to the rotating speed of the automobile engine when the carbon loading is greater than or equal to a carbon loading threshold value;
a first determination module to determine a minimum torque of the first and second torques as a braking torque of the vehicle, the braking torque to limit a temperature of the GPF during regeneration.
7. The apparatus of claim 6, wherein the apparatus further comprises:
the third acquisition module is used for acquiring the current temperature and ash content of the GPF;
and the second determining module is used for determining a corresponding carbon loading threshold from a corresponding relation table among the temperature, the ash content and the threshold according to the current temperature and the ash content of the GPF.
8. The apparatus of claim 6, wherein the second obtaining module comprises:
the first obtaining sub-module is used for obtaining the current rotating speed of the engine through a rotating speed sensor arranged on a flywheel disc of the automobile when the carbon loading amount is larger than or equal to the carbon loading amount threshold value;
the second obtaining submodule is used for obtaining the rotating speed limiting torque corresponding to the rotating speed from the corresponding relation between the rotating speed and the limiting torque;
and the determining submodule is used for determining the second torque according to the rotating speed limit torque.
9. The apparatus of claim 6, wherein the apparatus further comprises:
a third determination module to determine the first torque as a braking torque of the vehicle when the carbon load of the GPF is less than the carbon load threshold.
10. A computer-readable storage medium having stored thereon instructions which, when executed by a processor, carry out the steps of the method of any of the preceding claims 1 to 5.
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| CN202110480673.1A CN113123887B (en) | 2021-04-30 | 2021-04-30 | Method and device for determining braking torque of automobile and computer storage medium |
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| CN202110480673.1A CN113123887B (en) | 2021-04-30 | 2021-04-30 | Method and device for determining braking torque of automobile and computer storage medium |
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| EP1134371A2 (en) * | 2000-03-17 | 2001-09-19 | Ford Global Technologies, Inc. | Method and apparatus for controlling lean operation of an internal combustion engine |
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| CN109383489A (en) * | 2017-08-04 | 2019-02-26 | 丰田自动车株式会社 | The control device of vehicle |
| CN109931126A (en) * | 2019-03-07 | 2019-06-25 | 一汽-大众汽车有限公司 | The regenerative system and regeneration method of a kind of grain catcher, grain catcher |
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