CN114802173A

CN114802173A - Engine torque output control method and system, storage medium and vehicle

Info

Publication number: CN114802173A
Application number: CN202210317035.2A
Authority: CN
Inventors: 孙孟祥; 宁成钢
Original assignee: Jiangling Motors Corp Ltd
Current assignee: Jiangling Motors Corp Ltd
Priority date: 2022-03-29
Filing date: 2022-03-29
Publication date: 2022-07-29

Abstract

The invention discloses an engine torque output control method, an engine torque output control system, a storage medium and a vehicle, wherein the method comprises the following steps: the method comprises the steps that in the starting and running process of a vehicle, the speed, the rotating speed of an engine and the opening degree of an accelerator pedal of the vehicle are obtained in real time; respectively determining a first torque and a second torque for engine output according to the engine speed and the opening degree of an accelerator pedal; determining corresponding weights of the first torque and the second torque according to the vehicle speed; and assigning and summing the first torque and the second torque through the weight to control the engine to output torque. The invention solves the problem that the driving feeling is influenced by weak starting power when the vehicle starts to run at low speed in the prior art.

Description

Engine torque output control method and system, storage medium and vehicle

Technical Field

The invention relates to the technical field of automobiles, in particular to an engine torque output control method, an engine torque output control system, a storage medium and a vehicle.

Background

Along with the development of society, the car gets into millions of households to become the indispensable partly of people's daily life, and along with people's demand changes, the car still need satisfy people's comfortable demand outside the basic function who satisfies its initial vehicle, with promotion user's driving experience.

For example, when starting the vehicle, the vehicle can provide the driver with starting confidence by keeping the high torque at a low speed, and particularly, when starting the vehicle on a hill, the vehicle can be smoothly started while providing the driver with starting confidence by the high torque at the low speed.

In the prior art, in order to ensure the linear requirement of torque output in the running process of a vehicle, a lower torque is set for most vehicles under the conditions of low engine speed and small accelerator pedal opening, however, when the vehicle starts, the starting power provided by the low torque is weak, and the driving feeling is influenced.

Disclosure of Invention

In view of the above, the present invention aims to provide an engine torque output control method, system, storage medium and vehicle, which aims to solve the problem that the driving feeling is affected by weak starting power when the vehicle starts to run at a low speed in the prior art.

The embodiment of the invention is realized as follows: an engine torque output control method, the method comprising:

the method comprises the steps that in the starting and running process of a vehicle, the speed, the rotating speed of an engine and the opening degree of an accelerator pedal of the vehicle are obtained in real time;

respectively determining a first torque and a second torque for engine output according to the engine speed and the opening degree of an accelerator pedal;

determining corresponding weights of the first torque and the second torque according to the vehicle speed;

and assigning and summing the first torque and the second torque through the weight to control the engine to output torque.

Further, the engine torque output control method described above, wherein the step of determining the first torque and the second torque for the engine output based on the engine speed and the accelerator pedal opening degree, respectively, includes:

searching a first torque corresponding to the engine speed and the opening degree of an accelerator pedal in a first preset mapping table;

and searching a second torque corresponding to the engine speed and the opening degree of the accelerator pedal in a second preset mapping table.

Further, the engine torque output control method described above, wherein in the step of determining a first torque and a second torque for engine output based on the engine speed and an accelerator pedal opening degree, respectively, a torque value of one of the first torque and the second torque is larger than a torque value of the other;

wherein the first torque is within a first preset range and the second torque is within a second preset range.

Further, the method for controlling torque output of an engine as described above, wherein the step of summing the first torque and the second torque by the weight to control the torque output of the engine further includes:

acquiring a gearbox gear of the vehicle, and determining a correction coefficient according to the gearbox gear and the engine speed;

and correcting the torque after the assignment and summation according to the correction coefficient so as to control the engine to output the torque.

Further, the method for controlling engine torque output, wherein the step of obtaining a gear position of a transmission of the vehicle and determining a correction factor according to the gear position of the transmission and an engine speed further comprises:

judging whether the gear of the gearbox is lower than a preset gear or not;

and if so, executing a step of correcting the torque after the assignment and summation according to the correction coefficient so as to control the engine to output the torque.

Further, the engine torque output control method described above, wherein the step of determining the respective weights of the first torque and the second torque according to the vehicle speed further includes:

judging whether the time when the vehicle speed is lower than a preset vehicle speed meets a preset time range or not;

and if so, executing the step of respectively determining the corresponding weights of the first torque and the second torque according to the vehicle speed.

It is another object of the present invention to provide an engine torque output control system, the system comprising:

the acquisition module is used for acquiring the speed, the engine speed and the opening of an accelerator pedal of the vehicle in real time in the starting and running process of the vehicle;

the torque determination module is used for respectively determining a first torque and a second torque for engine output according to the engine speed and the opening degree of an accelerator pedal;

the weight determining module is used for respectively determining the corresponding weights of the first torque and the second torque according to the vehicle speed;

and the torque output module is used for carrying out assignment summation on the first torque and the second torque through the weight so as to control the engine to carry out torque output.

Further, in the engine torque output control system, the torque determination module is specifically configured to:

It is a further object of embodiments of the invention to provide a readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the steps of the method as described above.

It is a further object of embodiments of the invention to provide a vehicle comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method as described above when executing the program.

According to the invention, by setting two sets of torque output standards, when the vehicle starts to run, the weights of the two sets of torque outputs are determined according to the vehicle speed, and the torque obtained by weighted addition is used as the torque output of the engine, so that the linear requirement of the standard vehicle during running is ensured while the low-speed high-torque output is met, the driving experience is improved, and the problem that the driving feeling is influenced due to weak starting power when the vehicle starts to run in the prior art is solved.

Drawings

FIG. 1 is a flowchart of an engine torque output control method provided in a first embodiment of the present invention;

FIG. 2 is a flowchart of an engine torque output control method provided in a second embodiment of the present invention;

FIG. 3 is a flowchart of an engine torque output control method provided in a third embodiment of the present invention;

fig. 4 is a block diagram showing the construction of an engine torque output control system provided in a fourth embodiment of the present invention.

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for purposes of illustration only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed types.

The following will explain in detail how to satisfy the low-speed high-torque output and ensure the linearity requirement of a standard vehicle during driving, and improve the driving experience, with reference to the specific embodiment and the drawings.

Example one

Referring to FIG. 1, a method for controlling engine torque output according to a first embodiment of the present invention is shown, including steps S10-S13.

And step S10, acquiring the speed, the engine speed and the opening degree of an accelerator pedal of the vehicle in real time in the starting and running process of the vehicle.

In the embodiment, the vehicle starting driving process represents a time period from the starting time to the time when the vehicle speed is stabilized to a preset vehicle speed range, for example, the vehicle speed is stabilized to 10km/h, and the vehicle speed, the engine speed and the accelerator pedal opening degree of the vehicle can represent the time node of the vehicle during the starting driving process to a certain extent. .

And step S11, respectively determining a first torque and a second torque for engine output according to the engine speed and the accelerator pedal opening.

In the embodiment, two torque values, namely a first torque and a second torque, can be determined according to the engine speed and the accelerator pedal opening, wherein one torque value is a torque value that ensures linear output of the torque of the engine during the running of the vehicle, that is, the torque value is the same as the existing torque setting, the low torque is matched at the low engine speed and the small accelerator pedal opening, and the other torque value is a torque value obtained according to another set of torque setting rule in the prior art, for example, a higher torque output is provided at the low engine speed and the small accelerator pedal opening, and specifically, the purpose of applying the newly set torque value is achieved by newly adding data in an internal application layer in the vehicle controller.

Specifically, one of the first torque and the second torque has a torque value greater than the other torque value, the first torque is within a first preset range, the second torque is within a second preset range, and the first preset range and the second preset range may be set according to an actual situation.

In addition, in some alternative embodiments of the present invention, the step of determining the first torque and the second torque for the engine output according to the engine speed and the accelerator pedal opening degree may specifically include:

Specifically, the first torque and the second torque are stored in an internal application layer of the vehicle controller in the form of a mapping table, so that a corresponding torque value is obtained when the engine speed and the accelerator pedal opening degree are obtained.

Further, the settings of the first mapping table and the second mapping table may be set as shown in table 1 and table 2, respectively.

TABLE 1,

TABLE 2,

As is apparent from table 1 and table 2 above, the torque in table 2 is higher under the conditions of low engine speed and accelerator pedal, and the dynamic property is better when starting.

And step S12, determining the corresponding weights of the first torque and the second torque according to the vehicle speed.

The vehicle speed is used for judging whether the vehicle is in a low-speed state or a high-speed state, when the vehicle is in the low-speed state, high torque is output as much as possible so as to ensure that the vehicle can ensure better power output at the low speed, specifically, the relationship between the vehicle speed and the weight can be obtained in the form of a mapping table, and when the vehicle speed and the weight are specifically implemented, the mapping table can be set according to the following table 3.

TABLE 3,

Vehicle speed	0	2	4	6	8	10
							First torque weight	0	0.2	0.4	0.6	0.8	1
Second torque weight	1	0.8	0.6	0.4	0.2	0

In the present embodiment, the first torque is smaller than the second torque, the second torque is heavier than the first torque at a low speed, the second torque is heavier than the first torque at a specific speed per hour or less, the second torque is heavier as the speed decreases, the second torque is heavier than the first torque at a specific speed per hour or more, and the second torque is gradually heavier as the speed increases until the second torque completely passes through the first torque at 10km/h or more and is output. The torque performance of normal driving is not influenced while the low-speed high-torque output is realized.

And step S13, assigning and summing the first torque and the second torque through the weight to control the engine to output torque.

Specifically, the first torque and the second torque are assigned according to weights corresponding to the first torque and the second torque respectively to obtain a weighted first torque and a weighted second torque, and the weighted first torque and the weighted second torque are added and summed to obtain a torque which is actually required to be output by the engine.

In summary, in the engine torque output control method in the above embodiment of the present invention, by setting two sets of torque output standards, when the vehicle starts to run, weights of the two sets of torque outputs are determined according to a vehicle speed, and a torque obtained by adding the weights is used as a torque output of the engine, so that the linear requirement of the standard vehicle during running is ensured while the low-speed high-torque output is satisfied, and the driving experience is improved. The problem of among the prior art when carrying out vehicle start and go, start power weak and influence the driving impression is solved.

Example two

Referring to FIG. 2, a method for controlling engine torque output according to a second embodiment of the present invention is shown, including steps S20-S25.

And step S20, acquiring the speed, the engine speed and the opening degree of an accelerator pedal of the vehicle in real time in the starting and running process of the vehicle.

And step S21, respectively determining a first torque and a second torque for engine output according to the engine speed and the accelerator pedal opening.

And step S22, determining the corresponding weights of the first torque and the second torque according to the vehicle speed.

And step S23, assigning and summing the first torque and the second torque through the weight to control the engine to output torque.

And step S24, acquiring the gear position of the gearbox of the vehicle, and determining a correction coefficient according to the gear position of the gearbox and the engine speed.

In order to further improve the driving feeling of a driver at a low speed, namely, guarantee the dynamic performance of the vehicle by guaranteeing low speed and high torque, when the method is specifically implemented, the gear of the gearbox is obtained, the correction system is determined according to the gear of the gearbox and the rotating speed of the engine, specifically, the correction coefficient mainly plays a role in amplifying and correcting the torque required by the driver, namely when the vehicle is judged to be in a low-speed and low-gear state at present, the output torque is increased to guarantee the dynamic performance of the vehicle.

And step S25, correcting the torque after the assignment and summation according to the correction coefficient so as to control the engine to output the torque.

Specifically, the correction coefficient may be output in the form of a mapping table, and in the specific implementation, the mapping table of the correction coefficient may be set as shown in the following table 4.

TABLE 4,

In addition, since the modification is only amplified in the low gear, and the modification coefficients are all default values of 1 in the high gear, in order to avoid repeated acquisition of the modification coefficients in the high gear, in some alternative embodiments of the present invention, the step of acquiring the gear of the transmission of the vehicle, before the step of determining the modification coefficients according to the gear of the transmission and the rotation speed of the engine, further includes:

judging whether the gear of the gearbox is lower than a preset gear or not;

In this embodiment, the preset gear is 4 gears, which is not limited herein.

In summary, in the engine torque output control method in the above embodiment of the invention, by setting two sets of torque output standards, when the vehicle starts to run, the weights of the two sets of torque outputs are determined according to the vehicle speed, and the torque obtained by weighted addition is used as the torque output of the engine, so that the linear requirement of the standard vehicle during running is ensured while the low-speed high-torque output is met, the driving experience is improved, the torque is amplified and corrected before the torque output, and the problem that the driving experience is influenced due to weak starting power when the vehicle starts to run in the prior art is solved, and meanwhile, the dynamic performance of the vehicle at low speed and low gear is further improved.

EXAMPLE III

Referring to fig. 3, a method for controlling engine torque output according to a third embodiment of the present invention is shown, which includes steps S30-S35.

And step S30, acquiring the speed, the engine speed and the opening degree of an accelerator pedal of the vehicle in real time in the starting and running process of the vehicle.

And step S31, respectively determining a first torque and a second torque for engine output according to the engine speed and the accelerator pedal opening.

Step S32, judging whether the time when the vehicle speed is lower than the preset vehicle speed meets the preset time range; if yes, go to step S33.

The preset vehicle speed is a critical vehicle speed of the vehicle in a low-speed environment, for example, 10km/h and 15km/h, and may be defined according to an actual situation, in practice, it is determined whether to output the torque again after weighting processing is performed mainly according to whether the vehicle is in a low-speed environment, however, in the vehicle driving process, the vehicle speed may suddenly drop below the preset vehicle speed and instantly return to the preset vehicle speed or above due to some special situations, wherein some special situations include but are not limited to acceleration after sudden braking of the vehicle, according to normal steps, the vehicle needs to weight the torque again, actually, the current vehicle is not in a normal low-speed running environment, in order to avoid frequent switching of the vehicle in weighting, when the time when the vehicle is at a low speed satisfies a preset time range, the torque weighting processing is started, the safety of the vehicle is improved.

And step S33, determining the corresponding weights of the first torque and the second torque according to the vehicle speed.

And step S34, assigning and summing the first torque and the second torque through the weight to control the engine to output torque.

In summary, according to the engine torque output control method of the above embodiment of the present invention, by setting two sets of torque output standards, when the vehicle starts to run, weights of the two sets of torque outputs are determined according to a vehicle speed, and a torque obtained by adding the weights is used as a torque output of the engine, so that a linear requirement of the standard vehicle during running is ensured while a low-speed high-torque output is met, a driving experience is improved, a determination condition of the torque weighting is added, a problem that a driving experience is affected due to weak starting power when the vehicle starts to run in the prior art is solved, and meanwhile, a safety of the vehicle running is improved.

Example four

Referring to fig. 4, an engine torque output control system according to a fourth embodiment of the present invention is shown, the system including:

the acquiring module 100 is used for acquiring the speed, the engine speed and the opening degree of an accelerator pedal of a vehicle in real time in the starting and running process of the vehicle;

the torque determination module 200 is used for determining a first torque and a second torque for engine output according to the engine speed and the accelerator pedal opening degree;

a weight determination module 300, configured to determine corresponding weights of the first torque and the second torque according to the vehicle speed;

a torque output module 400 configured to assign a sum to the first torque and the second torque via the weights to control the engine to output torque.

Further, in the engine torque output control system described above, the torque determination module is specifically configured to:

Further, in the engine torque output control system described above, the torque determination module may determine that one of the first torque and the second torque has a torque value greater than the other;

Further, in some optional embodiments of the invention, the system further comprises:

the correction coefficient determining module is used for acquiring a gearbox gear of the vehicle and determining a correction coefficient according to the gearbox gear and the engine speed;

and the correction module is used for correcting the torque after the assignment and summation according to the correction coefficient so as to control the engine to output the torque.

the gear judging module is used for judging whether the gear of the gearbox is lower than a preset gear or not;

the time judgment module is used for judging whether the time when the vehicle speed is lower than a preset vehicle speed meets a preset time range or not;

The functions or operation steps of the above modules when executed are substantially the same as those of the above method embodiments, and are not described herein again.

EXAMPLE five

In another aspect, the present invention further provides a readable storage medium, on which a computer program is stored, which when executed by a processor implements the steps of the method according to any one of the first to third embodiments.

EXAMPLE six

In another aspect, the present invention further provides a vehicle, which includes a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method according to any one of the first to third embodiments.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

Those of skill in the art will understand that the logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be viewed as implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.

More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An engine torque output control method, characterized by comprising:

and assigning and summing the first torque and the second torque through the weight to control the torque output of the engine.

2. The engine torque output control method according to claim 1, wherein the step of determining the first torque and the second torque for the engine output based on the engine speed and the accelerator pedal opening degree, respectively, comprises:

searching a first torque corresponding to the engine rotating speed and the opening degree of an accelerator pedal in a first preset mapping table;

3. The engine torque output control method according to claim 1, characterized in that in the step of determining a first torque and a second torque for engine output based on the engine speed and an accelerator pedal opening degree, respectively, a torque value of one of the first torque and the second torque is larger than a torque value of the other;

4. The engine torque output control method according to claim 1, wherein the step of summing the first torque and the second torque assigned by the weight to control the engine to output torque further includes:

5. The engine torque output control method according to claim 4, wherein the step of obtaining a transmission gear of the vehicle, determining a correction factor based on the transmission gear and an engine speed, further comprises:

judging whether the gear of the gearbox is lower than a preset gear or not;

6. The engine torque output control method according to claim 1, characterized in that the step of determining the respective weights of the first torque and the second torque according to the vehicle speed further comprises:

7. An engine torque output control system, the system comprising:

8. The engine torque output control system of claim 7, wherein the torque determination module is specifically configured to:

and searching a second torque corresponding to the engine rotating speed and the opening degree of the accelerator pedal in a second preset mapping table.

9. A readable storage medium, on which a computer program is stored, which program, when being executed by a processor, is adapted to carry out the steps of the method according to any one of claims 1 to 6.

10. A vehicle comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor when executing the program implementing the steps of the method according to any one of claims 1 to 6.