CN109263619B - Finished automobile torque control method, device and system - Google Patents
Finished automobile torque control method, device and system Download PDFInfo
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- CN109263619B CN109263619B CN201811018775.6A CN201811018775A CN109263619B CN 109263619 B CN109263619 B CN 109263619B CN 201811018775 A CN201811018775 A CN 201811018775A CN 109263619 B CN109263619 B CN 109263619B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/17—Using electrical or electronic regulation means to control braking
- B60T8/175—Brake regulation specially adapted to prevent excessive wheel spin during vehicle acceleration, e.g. for traction control
Abstract
The invention provides a finished automobile torque control method, a finished automobile torque control device and a finished automobile torque control system, and relates to the technical field of new energy automobiles, wherein the method is applied to a finished automobile controller, the finished automobile controller is in communication connection with a TCS (train control system), and the method comprises the following steps: when the running state of the TCS system is monitored to be changed, determining the reference torque and the target torque of the current vehicle; extracting a preset calibration quantity, and calculating a transition coefficient when the reference torque is transited to the target torque; calculating the required torque of the current vehicle according to the transition coefficient by taking the reference torque as a starting point; outputting the required torque; when the required torque coincides with the target torque, the calculation process of the required torque is stopped, and the target torque is taken as the required torque and the target torque is output. The whole vehicle torque control method, the device and the system effectively relieve the vehicle pause and frustration phenomenon after the TCS system of the current vehicle is activated, and are also beneficial to responding the acceleration request of the driver in time, thereby improving the experience degree of the driver.
Description
Technical Field
The invention relates to the technical field of new energy automobiles, in particular to a method, a device and a system for controlling the torque of a whole automobile.
Background
With the increasing popularization of new energy automobiles, the quantity of new energy automobiles is increasing, people are also continuously and deeply researching new energy automobiles, and the new energy automobiles are an important way for solving the prominent problem of urban automobile pollution due to the characteristics of low noise, no pollution, zero emission and high energy conversion efficiency. The development of new energy automobiles has profound influence on the adjustment of the industrial structure of China, the improvement of the innovation capability and the market competitiveness of key fields and the promotion of the coordinated development of the economic society.
The motor is a key part of the new energy automobile and is also a power core of the new energy automobile, and how to optimize and control the torque output of the motor of the new energy automobile is very critical to the working capacity of the new energy automobile, the service life of a battery is prolonged, and the safety protection of a driver is realized. Particularly, for a new energy vehicle equipped with a TCS (access Slip Regulation) system, since a power output response speed of the new energy vehicle is faster than that of a conventional power vehicle, if the new energy vehicle is controlled by a torque control logic after the TCS system is activated by the conventional power vehicle, a phenomenon of jerk is easily generated, it is difficult to respond to a driving request of a driver, and a driver's experience is reduced.
Disclosure of Invention
In view of the above, the present invention provides a method, an apparatus and a system for controlling a torque of a whole vehicle, so as to alleviate the above technical problems.
In a first aspect, an embodiment of the present invention provides a vehicle torque control method, where the method is applied to a vehicle controller, and the vehicle controller is in communication connection with a TCS system, and the method includes: when the running state of the TCS system is monitored to be changed, determining the reference torque and the target torque of the current vehicle; extracting a preset calibration quantity, and calculating a transition coefficient when the reference torque is transited to the target torque; calculating the required torque output required torque of the current vehicle according to the transition coefficient by taking the reference torque as a starting point; when the required torque coincides with the target torque, the calculation process of the required torque is stopped, and the target torque is taken as the required torque and the target torque is output.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where the running state occurrence of the TCS system includes an active state and an inactive state; when the running state of the TCS system is changed from the inactive state to the active state, or when the running state of the TCS system is changed from the active state to the inactive state, it is determined that the running state of the TCS system is monitored to be changed.
With reference to the first possible implementation manner of the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, where, when the operation state of the TCS system changes from the inactive state to the active state, the step of determining the reference torque of the current vehicle, and the target torque includes: acquiring the current driving torque of the automobile before the TCS system is activated; setting the driving torque as a reference torque; and setting the output torque of the TCS system to the target torque.
With reference to the second possible implementation manner of the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, wherein the step of extracting a preset calibration amount and calculating a transition coefficient when the reference torque is transitioned to the target torque includes: when the target torque is larger than the reference torque, extracting a preset first calibration quantity and a wheel speed difference coefficient corresponding to the first calibration quantity; calculating a first transition coefficient when the reference torque is transited to the target torque, wherein the first transition coefficient is the product of a first calibration quantity and a wheel speed difference coefficient; when the target torque is smaller than the reference torque, extracting a preset second calibration quantity and a wheel speed difference coefficient corresponding to the second calibration quantity; and calculating a second transition coefficient when the reference torque is transited to the target torque, wherein the second transition coefficient is the product of the second calibration quantity and the wheel speed difference coefficient.
With reference to the first possible implementation manner of the first aspect, the example of the present invention provides a fourth possible implementation manner of the first aspect, where, when the operation state of the TCS system changes from the active state to the inactive state, the step of determining the reference torque and the target torque of the current vehicle includes: acquiring a lowest torque threshold corresponding to the TCS system, and setting the lowest torque threshold as a reference torque; and acquiring the current driving torque of the vehicle when the TCS system is in an inactive state, and setting the current driving torque of the vehicle as a target torque.
With reference to the fourth possible implementation manner of the first aspect, the example of the present invention provides a fifth possible implementation manner of the first aspect, wherein the step of extracting a preset calibration amount and calculating a transition coefficient when the reference torque is transitioned to the target torque includes: when the target torque is larger than the reference torque, extracting a preset third calibration quantity; setting the third calibration amount as a third transition coefficient when the reference torque is transited to the target torque; and when the target torque is smaller than the reference torque, extracting a preset fourth calibration amount, and setting the fourth calibration amount as a fourth transition coefficient when the reference torque is transited to the target torque.
With reference to the first aspect and the first to fifth possible implementation manners of the first aspect, an embodiment of the present invention provides a sixth possible implementation manner of the first aspect, where the method further includes: obtaining the wheel speed of a current vehicle, obtaining the maximum wheel speed value and the minimum wheel speed value in the wheel speed, and calculating a first sampling wheel speed difference value; calculating the difference value of the wheel speeds of the other two wheels, and setting the difference value as a second sampling wheel speed difference value; and calibrating the wheel speed difference coefficient according to the first sampling wheel speed difference value and the second sampling wheel speed difference value.
In a second aspect, an embodiment of the present invention further provides a vehicle torque control device, where the device is disposed in a vehicle controller, and the vehicle controller is in communication connection with a TCS system, and the device includes: the determination module is used for determining the reference torque and the target torque of the current vehicle when the change of the running state of the TCS system is monitored; the first calculation module is used for extracting a preset calibration quantity and calculating a transition coefficient when the reference torque is transited to the target torque; the second calculation module is used for calculating the required torque of the current vehicle according to the transition coefficient by taking the reference torque as a starting point; the first output module is used for outputting the required torque; and the second output module is used for stopping the calculation process of the required torque when the required torque is consistent with the target torque, taking the target torque as the required torque and outputting the target torque.
With reference to the second aspect, an embodiment of the present invention provides a first possible implementation manner of the second aspect, where the operating state occurrence of the TCS system includes an active state and an inactive state; the determination module is to: when the running state of the TCS system is changed from the inactive state to the active state, or when the running state of the TCS system is changed from the active state to the inactive state, it is determined that the running state of the TCS system is monitored to be changed.
In a third aspect, an embodiment of the present invention further provides a finished vehicle torque control system, where the system includes a finished vehicle controller, and a TCS system in communication connection with the finished vehicle controller; the vehicle control unit comprises a memory for storing a program for supporting the processor to execute the above method and a processor configured to execute the program stored in the memory.
The embodiment of the invention has the following beneficial effects:
according to the method, the device and the system for controlling the torque of the whole vehicle, provided by the embodiment of the invention, when the running state of the TCS system is monitored to change, the reference torque and the target torque of the current vehicle can be determined, the required torque of the current vehicle is calculated, and when the required torque is consistent with the target torque, the target torque is output to control the power output of the vehicle, so that the phenomenon that the vehicle is suspended after the current vehicle is activated in the TCS system is effectively relieved, meanwhile, the acceleration request of a driver can be responded timely, and the experience degree of the driver is further improved.
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 flow chart of a vehicle torque control method according to an embodiment of the present invention;
FIG. 2 is a flowchart of another vehicle torque control method provided by the embodiment of the invention;
FIG. 3 is a flowchart of another vehicle torque control method provided by the embodiment of the invention;
FIG. 4 is a schematic structural diagram of a vehicle torque control device according to an embodiment of the present invention;
fig. 5 is a block diagram of a torque control system of a complete vehicle according to an embodiment of the present invention.
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.
At present, after a TCS system of a new energy vehicle, such as an electric vehicle, is activated, torque control of the new energy vehicle is performed according to a working mode of a conventional power vehicle, which often causes a phenomenon of jerk in a driving process of the entire vehicle after the TCS system is activated, and it is difficult to respond to an acceleration request of a driver in time. Based on this, the embodiment of the invention provides a finished automobile torque control method, device and system, which can relieve the phenomenon that the torque control of the existing new energy automobile after the TCS system is activated is easy to be interrupted when the finished automobile is controlled according to the working mode of the conventional power automobile.
For the convenience of understanding the embodiment, a detailed description will be given to a vehicle torque control method disclosed in the embodiment of the present invention.
The Vehicle Control method provided by the embodiment of the invention is applied to a Vehicle Control Unit (VCU), which is also called as a VCU (Vehicle Control Unit), and is a Control center of each subsystem of a new energy Vehicle to coordinate and manage the running state of the whole Vehicle. Therefore, the torque control logic of the vehicle controller directly influences the state of the vehicle during driving.
The TCS System, also called a Traction Control System (TCS), is used to obtain optimal Traction for a vehicle under various driving conditions, and has a working principle of monitoring the working state of the vehicle by installing a wheel speed sensor on a wheel, and if there is a wheel slipping, the TCS System is used to Control the vehicle by cooperating with an Antilock Brake System (ABS) and a vehicle Control System to prevent the vehicle from being out of Control.
The vehicle control method provided by the embodiment of the invention can be applied to a vehicle control unit, and the vehicle control unit is in communication connection with a TCS system. Fig. 1 shows a flowchart of a vehicle torque control method, which includes the following steps:
and step S102, when the change of the running state of the TCS system is monitored, determining the reference torque of the current vehicle and the target torque.
In particular, the reference torque and the target torque are instantaneous values obtained when the operating state of the TCS system changes.
In step S104, a preset calibration amount is extracted, and a transition coefficient when the reference torque is transitioned to the target torque is calculated.
In the concrete implementation, the preset calibration quantities extracted according to different TCS system states have different positive values and negative values, and the calibration quantities are fixed values. When the reference torque is transited to the target torque, the vehicle control unit is required to calculate the transition coefficient, and the calibration quantity participates in the calculation process of the transition coefficient.
And step S106, calculating the current required torque of the vehicle according to the transition coefficient by taking the reference torque as a starting point.
In step S108, the required torque is output.
The reference torque obtained when the state of the TCS system changes is used as a starting point, then the VCU calculates the torque required by the current vehicle according to the transition coefficient, and outputs the required torque.
And step S110, when the required torque is consistent with the target torque, stopping the calculation process of the required torque, taking the target torque as the required torque, and outputting the target torque.
Specifically, when the state of the TCS system changes, the determined reference torque is used as an output starting point of the required torque, the target torque is used as an output end point of the required torque, the reference torque is transited to the target torque according to the transition coefficient, the VCU calculates the torque required by the current vehicle according to the transition coefficient, and when the required torque is consistent with the target torque, the VCU stops the calculation process of the required torque and finally outputs the target torque.
According to the vehicle torque control method provided by the embodiment of the invention, when the running state of the TCS system is monitored to be changed, the reference torque and the target torque of the current vehicle can be determined, the required torque of the current vehicle is calculated, and when the required torque is consistent with the target torque, the target torque is output to control the power output of the vehicle, so that the phenomenon of vehicle suspension after the current vehicle is activated in the TCS system is effectively relieved, meanwhile, the vehicle torque control method is also beneficial to timely responding to the acceleration request of a driver, and the experience degree of the driver is further improved.
The running state of the TCS system comprises an activated state and an inactivated state; when the operation state of the TCS system changes from the inactive state to the active state, or when the operation state of the TCS system changes from the active state to the inactive state, it may be determined that the operation state of the TCS system is monitored to change.
Generally, the TCS system can monitor the wheel speed sensor installed at the wheel, monitors the working state of the wheel speed of the whole vehicle, and controls the vehicle by matching with the ABS system and the whole vehicle control system if the wheels slip, so that the vehicle is prevented from being out of control. For example, when the wheel speeds of the four wheels of the new energy automobile reach a certain difference value, the running state of the TCS system is changed from the inactive state to the active state, and when the wheel speed difference value of the four wheels of the new energy automobile is restored to the normal running state of the automobile, the running state of the TCS system is changed from the active state to the inactive state.
Specifically, when the operating state of the TCS system is changed from the inactive state to the active state, the determining of the reference torque of the current vehicle and the target torque includes: acquiring the current driving torque of the automobile before the TCS system is activated; setting a driving torque as a reference torque; and setting the output torque of the TCS system to the target torque.
In specific implementation, the TCS is required to activate the instantaneous driving torque, and the driving torque is used as the reference torque of the current vehicle. Generally, the vehicle control unit VCU may sum a driver's driving torque and a driver's braking torque to obtain the driving torque, wherein the driving torque is a positive value and the braking torque is a negative value.
Specifically, the process of acquiring the driving torque of the driver may include: the method comprises the steps of obtaining the opening degree of an accelerator pedal and the vehicle speed, and then obtaining the driving torque of a driver corresponding to the opening degree of the accelerator pedal and the vehicle speed according to a preset driver driving force demand table. Further, the process of acquiring the driver's braking torque may include: acquiring a vehicle speed, and acquiring an initial torque value according to a preset speedometer; then obtaining the opening degree of a brake pedal, and obtaining the depth value of the brake pedal according to a preset brake pedal opening degree table; then obtaining the ratio of the residual electric quantity of the battery; and (4) obtaining the braking torque of the driver by multiplying the initial torque value, the depth value of the brake pedal and the ratio of the residual electric quantity of the battery.
Further, the TCS system is activated, and its output torque is usually a fixed torque, so it can be set as a target torque.
To facilitate understanding of the overall vehicle torque control process when the TCS is changed from the inactive state to the active state, fig. 2 shows a flowchart of another overall vehicle torque control method, which includes the following steps:
step S202: when the running state of the TCS system is changed from the inactive state to the active state, acquiring the current driving torque of the automobile before the TCS system is activated;
step S204: setting an output torque of the TCS system as a target torque;
step S206: when the target torque is larger than the reference torque, extracting a preset first calibration quantity and a wheel speed difference coefficient corresponding to the first calibration quantity;
step S208: calculating a first transition coefficient when the reference torque is transited to the target torque, wherein the first transition coefficient is the product of a first calibration quantity and a wheel speed difference coefficient;
for example, a represents a first calibration quantity, the wheel speed difference coefficient corresponding to the first calibration quantity a is a, and at this time, the first transition coefficient when the reference torque is transited to the target torque is the product of the first calibration quantity a and the wheel speed difference coefficient a, i.e. a × a;
step S210: when the target torque is smaller than the reference torque, extracting a preset second calibration quantity and a wheel speed difference coefficient corresponding to the second calibration quantity;
step S212: and calculating a second transition coefficient when the reference torque is transited to the target torque, wherein the second transition coefficient is the product of a second calibration quantity and the wheel speed difference coefficient.
For example, b represents a second calibration amount, and the wheel speed difference coefficient corresponding to the second calibration amount b is a1, and at this time, the second transition coefficient when the reference torque is transited to the target torque is the product of the second calibration amount b and the wheel speed difference coefficient a1, that is, b × a 1;
step S214: calculating the required torque of the current vehicle according to the transition coefficient by taking the reference torque as a starting point, and outputting the required torque;
step S216: when the required torque coincides with the target torque, the calculation process of the required torque is stopped, and the target torque is taken as the required torque and is output.
Specifically, when the target torque is greater than the reference torque, the required torque may be gradually increased with the first transition coefficient as a slope and the reference torque as a starting point until the required torque is equal to the target torque;
similarly, when the target torque is smaller than the reference torque, the second transition coefficient may be used as a slope, and the reference torque may be used as a starting point, and the required torque may be gradually reduced until the required torque is equal to the target torque;
when the required torque is equal to the target torque, the target torque is set as the required torque to control the output torque of the motor, so that the torque of the motor is gradually changed, the torque jump is effectively prevented from being suddenly and gradually changed, and the driving comfort of a driver is further ensured.
Further, fig. 3 shows a flowchart of another vehicle torque control method, which describes a vehicle torque control process when the TCS system changes from an active state to an inactive state, and as shown in fig. 3, the method includes the following steps:
step S302: when the running state of the TCS system is changed from an activated state to an inactivated state, acquiring a lowest torque threshold corresponding to the TCS system, and setting the lowest torque threshold as a reference torque;
generally, the minimum torque threshold may be pre-stored in the vehicle controller for calculation. In a specific implementation, the minimum torque threshold may be close to a fixed value of 0, and the device may be specifically implemented according to an actual situation, which is not limited in the embodiment of the present invention.
Step S304: acquiring the driving torque of the current automobile when the TCS system is in an inactive state, and setting the driving torque of the current automobile as a target torque;
step S306: when the target torque is larger than the reference torque, extracting a preset third calibration quantity, and setting the third calibration quantity as a third transition coefficient when the reference torque is transited to the target torque;
for example, the third calibration amount is represented by c, and in this case, the third transition coefficient when the reference torque is transitioned to the target torque may also be represented by c;
step S308: when the target torque is smaller than the reference torque, extracting a preset fourth calibration quantity, and setting the fourth calibration quantity as a fourth transition coefficient when the reference torque is transited to the target torque;
for example, a fourth calibration amount is represented by d, and in this case, a fourth transition coefficient when the reference torque is transitioned to the target torque may also be represented by d;
step S310: calculating the required torque of the current vehicle according to the transition coefficient by taking the reference torque as a starting point, and outputting the required torque;
step S312: when the required torque coincides with the target torque, the calculation process of the required torque is stopped, and the target torque is taken as the required torque and is output.
Specifically, when the TCS system is changed from the active state to the inactive state, the required torque of the motor may be a third or fourth calibration amount as a slope limit value of the required torque change, so that the torque output of the motor keeps changing linearly, the driving comfort is ensured, and the entire vehicle runs stably without jerking.
In actual use, the first calibration quantity, the second calibration quantity, the third calibration quantity or the fourth calibration quantity are physical quantities which can be calibrated, and in actual use, the calibration is carried out in a simulation or modeling mode, for example, different vehicle models or different engine models and the like can have different calibration quantities.
Further, the wheel speed difference coefficient corresponding to the first calibration amount and the wheel speed difference coefficient corresponding to the second calibration amount may also be calibrated according to an actual vehicle model, for convenience of calculation, generally, the wheel speed difference coefficient corresponding to the first calibration amount and the wheel speed difference coefficient corresponding to the second calibration amount may be set to be the same physical amount, and the calibration process of the wheel speed difference coefficient may be performed through the wheel speed acquired by the wheel speed sensor disposed at the wheel.
Specifically, the wheel speed difference coefficient calibration process may include the following steps: obtaining the wheel speed of a current vehicle, obtaining the maximum wheel speed value and the minimum wheel speed value in the wheel speed, and calculating a first sampling wheel speed difference value; calculating the difference value of the wheel speeds of the other two wheels, and setting the difference value as a second sampling wheel speed difference value; and calibrating the wheel speed difference coefficient according to the first sampling wheel speed difference value and the second sampling wheel speed difference value. For example, a calibration table may be established according to a plurality of values of the first sampled wheel speed difference value and the second sampled wheel speed difference value, the horizontal axis and the number axis of the table header may be corresponding sampled wheel speed difference values, and the content in the table may be wheel speed difference coefficients corresponding to the first sampled wheel speed difference value and the second sampled wheel speed difference value.
In a specific implementation, the calibration process of the first calibration amount, the second calibration amount, the third calibration amount or the fourth calibration amount, and the calibration process of the wheel speed difference coefficient may be implemented according to actual conditions and with reference to related technical data, and the embodiment of the present invention is not limited to this.
Corresponding to the vehicle torque control method provided in the foregoing embodiment, an embodiment of the present invention further provides a vehicle torque control device, as shown in fig. 4, where the device is disposed in a vehicle controller, and the vehicle controller is in communication connection with a TCS system, as shown in fig. 4, where the device includes:
the determination module 40 is used for determining a reference torque of the current vehicle and a target torque when the change of the running state of the TCS system is monitored;
a first calculating module 41, configured to extract a preset calibration amount and calculate a transition coefficient when the reference torque is transitioned to the target torque;
the second calculating module 42 is used for calculating the required torque of the current vehicle according to the transition coefficient by taking the reference torque as a starting point;
a first output module 43 for outputting the above-mentioned required torque;
and a second output module 44 for stopping the calculation of the required torque when the required torque is consistent with the target torque, and outputting the target torque with the target torque as the required torque.
Specifically, the running state of the TCS system includes an active state and an inactive state; the determining module is configured to: when the running state of the TCS system is changed from the inactive state to the active state, or when the running state of the TCS system is changed from the active state to the inactive state, it is determined that the running state of the TCS system is monitored to be changed.
The whole vehicle torque control device provided by the embodiment of the invention has the same technical characteristics as the whole vehicle torque control method provided by the embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.
The embodiment of the invention also provides a finished automobile torque control system which comprises a finished automobile controller and a TCS system in communication connection with the finished automobile controller.
Specifically, the vehicle control unit comprises a processor and a memory, wherein the memory is used for storing programs for supporting the processor to execute the method of the embodiment, and the processor is configured to execute the programs stored in the memory.
Referring to fig. 5, a structural block diagram of a vehicle torque control system includes: the system comprises a processor 500, a memory 501, a bus 502 and a communication interface 503, wherein the processor 500, the communication interface 503 and the memory 501 are connected through the bus 502; the processor 500 is used to execute executable modules, such as computer programs, stored in the memory 501.
The Memory 501 may include a high-speed Random Access Memory (RAM) and may also include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. The communication connection between the network element of the system and at least one other network element is realized through at least one communication interface 503 (which may be wired or wireless), and the internet, a wide area network, a local network, a metropolitan area network, and the like can be used.
Bus 502 can be an ISA bus, PCI bus, EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one double-headed arrow is shown in FIG. 5, but this does not indicate only one bus or one type of bus.
The memory 501 is used for storing a program, and the processor 500 executes the program after receiving an execution instruction, and the entire vehicle torque control method disclosed in any embodiment of the invention may be applied to the processor 500, or implemented by the processor 500.
The processor 500 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 500. The Processor 500 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 501, and the processor 500 reads the information in the memory 501, and completes the steps of the method in combination with the hardware thereof.
The computer program product of the vehicle-mounted torque control system provided by the embodiment of the present invention includes a computer readable storage medium storing program codes, where instructions included in the program codes may be used to execute 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 system and the apparatus described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
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 computer readable storage medium. 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: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that the following embodiments are merely illustrative of the present invention, and not restrictive, and the scope of the present invention is not limited thereto: 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 claims.
Claims (9)
1. The finished automobile torque control method is applied to a finished automobile controller, the finished automobile controller is in communication connection with a TCS system, and the method comprises the following steps:
when the running state of the TCS system is monitored to be changed, determining the reference torque and the target torque of the current vehicle;
extracting a preset calibration quantity, and calculating a transition coefficient when the reference torque is transited to the target torque;
calculating the required torque of the current vehicle according to the transition coefficient by taking the reference torque as a starting point;
outputting the required torque;
stopping the calculation process of the required torque when the required torque is consistent with the target torque, taking the target torque as the required torque, and outputting the target torque;
wherein the step of extracting a preset calibration amount and calculating a transition coefficient when the reference torque is transitioned to the target torque includes:
when the target torque is larger than the reference torque, extracting a preset first calibration quantity and a wheel speed difference coefficient corresponding to the first calibration quantity;
calculating a first transition coefficient when the reference torque is transited to the target torque, wherein the first transition coefficient is a product of the first calibration quantity and the wheel speed difference coefficient;
when the target torque is smaller than the reference torque, extracting a preset second calibration quantity and a wheel speed difference coefficient corresponding to the second calibration quantity;
and calculating a second transition coefficient when the reference torque is transited to the target torque, wherein the second transition coefficient is the product of the second calibration quantity and the wheel speed difference coefficient.
2. The method of claim 1, wherein the TCS system run state occurrence comprises an active state and an inactive state;
when the running state of the TCS system is changed from an inactive state to an active state, or when the running state of the TCS system is changed from an active state to an inactive state, determining that the running state of the TCS system is changed.
3. The method of claim 2, wherein when the operating state of the TCS system is changed from an inactive state to an active state, the step of determining the reference torque of the current vehicle and the target torque comprises:
acquiring the driving torque of the current vehicle before the TCS system is activated;
setting the driving torque as a reference torque; and setting an output torque of the TCS system to a target torque.
4. The method of claim 2, wherein when the operating state of the TCS system is changed from an active state to an inactive state, the step of determining the reference torque of the current vehicle and the target torque comprises:
acquiring a lowest torque threshold corresponding to the TCS system, and setting the lowest torque threshold as a reference torque; and acquiring the driving torque of the current vehicle when the TCS system is in an inactive state, and setting the driving torque of the current vehicle as a target torque.
5. The method according to claim 4, wherein the step of extracting a preset calibration amount and calculating a transition coefficient when the reference torque is transitioned to the target torque comprises:
when the target torque is larger than the reference torque, extracting a preset third calibration quantity; setting the third calibration amount as a third transition coefficient when the reference torque is transitioned to the target torque;
and when the target torque is smaller than the reference torque, extracting a preset fourth calibration amount, and setting the fourth calibration amount as a fourth transition coefficient when the reference torque is transited to the target torque.
6. The method of claim 1, further comprising:
obtaining the wheel speed of the current vehicle, obtaining the maximum wheel speed value and the minimum wheel speed value in the wheel speed, and calculating a first sampling wheel speed difference value; calculating the difference value of the wheel speeds of the other two wheels, and setting the difference value of the wheel speeds of the other two wheels as a second sampling wheel speed difference value;
and calibrating the wheel speed difference coefficient according to the first sampling wheel speed difference value and the second sampling wheel speed difference value.
7. The utility model provides a whole car torque control device, its characterized in that, the device sets up in whole car controller, whole car controller and TCS system communication connection, the device includes:
the determination module is used for determining the reference torque and the target torque of the current vehicle when the running state of the TCS system is monitored to be changed;
the first calculation module is used for extracting a preset standard quantity and calculating a transition coefficient when the reference torque is transited to the target torque;
the second calculation module is used for calculating the required torque of the current vehicle according to the transition coefficient by taking the reference torque as a starting point;
a first output module for outputting the required torque;
a second output module configured to stop a calculation process of the required torque when the required torque is consistent with the target torque, take the target torque as the required torque, and output the target torque;
wherein the first computing module is further configured to: when the target torque is larger than the reference torque, extracting a preset first calibration quantity and a wheel speed difference coefficient corresponding to the first calibration quantity;
calculating a first transition coefficient when the reference torque is transited to the target torque, wherein the first transition coefficient is a product of the first calibration quantity and the wheel speed difference coefficient;
when the target torque is smaller than the reference torque, extracting a preset second calibration quantity and a wheel speed difference coefficient corresponding to the second calibration quantity;
and calculating a second transition coefficient when the reference torque is transited to the target torque, wherein the second transition coefficient is the product of the second calibration quantity and the wheel speed difference coefficient.
8. The apparatus of claim 7, wherein the TCS system operational state occurrence comprises an active state and an inactive state; the determination module is to:
when the running state of the TCS system is changed from an inactive state to an active state, or when the running state of the TCS system is changed from an active state to an inactive state, determining that the running state of the TCS system is changed.
9. The finished automobile torque control system is characterized by comprising a finished automobile controller and a TCS system in communication connection with the finished automobile controller;
the hybrid vehicle controller includes a memory for storing a program that enables the processor to perform the method of any one of claims 1-6 and a processor configured to execute the program stored in the memory.
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| CN112622856B (en) * | 2020-12-25 | 2022-02-08 | 中国第一汽车股份有限公司 | Regenerative braking method and device for hybrid power assembly rack, vehicle and medium |
| CN113619560A (en) * | 2021-09-06 | 2021-11-09 | 中国第一汽车股份有限公司 | Method and device for controlling output torque of automobile, electronic equipment and medium |
| CN113858973A (en) * | 2021-10-29 | 2021-12-31 | 上海拿森汽车电子有限公司 | Torque correction method, vehicle, and computer-readable storage medium |
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| JP2008081006A (en) * | 2006-09-28 | 2008-04-10 | Mitsubishi Electric Corp | Vehicle traveling control device |
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