CN116691642A

CN116691642A - Torque setting method and device for hybrid vehicle and hybrid vehicle

Info

Publication number: CN116691642A
Application number: CN202310982867.0A
Authority: CN
Inventors: 梁源; 陈轶; 周正伟; 崔环宇; 师合迪; 王发
Original assignee: Chengdu Seres Technology Co Ltd
Current assignee: Chongqing Selis Phoenix Intelligent Innovation Technology Co ltd
Priority date: 2023-08-07
Filing date: 2023-08-07
Publication date: 2023-09-05
Anticipated expiration: 2043-08-07
Also published as: CN116691642B

Abstract

The invention discloses a hybrid power vehicle torque setting method and device and a hybrid power vehicle, and relates to the technical field of new energy automobiles. The method comprises the following steps: each interval adjustment period is used for obtaining the current battery pack residual capacity, the current running working condition and the current torque requirement value of the vehicle under the parallel working condition; acquiring a current engine torque offset according to the current battery pack residual electric quantity and the current running working condition; and setting a target engine torque and a target motor torque according to the current battery pack residual capacity, the current torque demand value and the current engine torque offset. By implementing the method, the residual capacity of the battery pack can be close to the user setting under the condition that the user sets the residual capacity of the battery pack, and the engine torque is kept in an economic zone all the time; the performance setting of the hybrid electric vehicle by a user is met, and the user experience is improved; meanwhile, the energy efficiency of fuel oil is ensured, and the oil consumption is reduced.

Description

Torque setting method and device for hybrid vehicle and hybrid vehicle

Technical Field

The invention relates to the technical field of new energy automobiles, in particular to a torque setting method and device for a hybrid electric vehicle and the hybrid electric vehicle.

Background

With the popularization of new energy automobiles, user experience is increasingly emphasized on the basis of ensuring the driving performance of the vehicles. The user can configure part of vehicle parameters according to own driving habits, so that the vehicle performance meets own requirements. For example: the user can set the remaining capacity of the battery pack of the hybrid vehicle within a certain range to satisfy the balance of the vehicle performance and the charging frequency. In general, the driving method varies depending on the amount of remaining power. In some special cases, the output torque interval of the engine is out of the range of the economy zone, and the fuel utilization efficiency is reduced. How to enable the residual capacity of the battery pack to approach the user setting under the condition that the user flexibly sets the residual capacity of the battery pack, and keep the torque of the engine always in an economic area, so that the fuel utilization rate is improved, and the problem to be solved is urgent.

Disclosure of Invention

In order to solve the problem that the residual capacity of a battery pack approaches to the setting of a user and the torque of an engine is always in the range of an economic zone under the condition that the residual capacity of the battery pack is set by the user, the invention adopts the following technical scheme:

in a first aspect, there is provided a torque setting method of a hybrid vehicle, including:

Each interval adjustment period is used for obtaining the current battery pack residual capacity, the current running working condition and the current torque requirement value of the vehicle under the parallel working condition;

acquiring a current engine torque offset according to the current battery pack residual electric quantity and the current running working condition;

and setting a target engine torque and a target motor torque according to the current battery pack residual capacity, the current torque demand value and the current engine torque offset.

Further, the hybrid vehicle torque setting method further includes:

the vehicle engine is driven to generate an actual engine torque according to the target engine torque, and the vehicle motor is driven to generate an actual motor torque according to the target motor torque, wherein the difference between the actual engine torque and the target engine torque is within a first error range, and the difference between the actual motor torque and the target motor torque is within a second error range.

Further, according to the current battery pack residual capacity and the current running condition, the current engine torque offset is obtained, including:

acquiring an electric quantity torque offset according to the current residual electric quantity of the battery pack, wherein the electric quantity torque offset comprises: a first electrical quantity torque offset, a second electrical quantity torque offset;

Acquiring a working condition torque offset according to the current running working condition, wherein the working condition torque offset comprises: the first working condition torque offset, the second working condition torque offset and the third working condition torque offset;

and taking the sum of the electric quantity torque offset and the working condition torque offset as the current engine torque offset.

Further, obtaining the electric quantity torque offset according to the current residual electric quantity of the battery pack includes:

responding to the difference between the current battery pack residual capacity and the battery pack target capacity is larger than a first preset value, acquiring a corresponding first electric quantity torque offset according to the difference between the current battery pack residual capacity and the battery pack target capacity and a first comparison table, and taking the first electric quantity torque offset as an electric quantity torque offset, wherein the battery pack target capacity is set by a user;

and responding to the difference between the current battery pack residual capacity and the battery pack target capacity is smaller than or equal to a first preset value, acquiring a corresponding second electric quantity torque offset according to the difference between the current battery pack residual capacity and the battery pack target capacity and a second comparison table, and taking the second electric quantity torque offset as an electric quantity torque offset.

Further, the electrical quantity torque offset also includes an accessory drive torque;

The obtaining the electric quantity torque offset according to the current residual electric quantity of the battery pack further comprises:

responsive to the current battery remaining charge being less than a second preset value, and/or

If the difference between the current battery pack residual electric quantity and the battery pack target electric quantity is smaller than a third preset value, acquiring current accessory power, wherein the current accessory power is the sum of direct current converter power, heater power and compressor power;

obtaining an accessory driving torque according to the current accessory power and the current engine speed;

the accessory drive torque and the sum of the first charge torque offset or the second charge torque offset are taken as the charge torque offset.

Further, obtaining the working condition torque offset according to the current driving working condition includes:

responding to the fact that the current vehicle speed is greater than a first preset vehicle speed, the current average vehicle speed is greater than a second preset vehicle speed, and the current average gradient is smaller than or equal to the first preset gradient, and acquiring corresponding torque offset of the first working condition according to the current vehicle speed and a third comparison table;

responding to the fact that the current average gradient is larger than the first preset gradient and the current average pedal opening is larger than the first preset opening, and acquiring a corresponding second working condition torque offset according to the current gradient of the vehicle and a fourth comparison table;

Responding to the fact that the current average gradient is smaller than the second preset gradient, the current average pedal opening is smaller than the second preset opening, and the difference between the current battery pack residual capacity and the battery pack target capacity is smaller than or equal to a fourth preset value, and obtaining a corresponding third working condition torque offset according to the current gradient of the vehicle and a fifth comparison table;

and taking the sum of the first working condition torque offset, the second working condition torque offset and the third working condition torque offset as the working condition torque offset.

Further, setting the target engine torque and the target motor torque according to the current battery pack remaining capacity, the current torque demand value, and the current engine torque offset, comprising:

in response to the current torque demand being greater than the first torque, taking the sum of the first torque and the current engine torque offset as the target engine torque;

in response to the current torque demand being less than the second torque, taking the sum of the second torque and the current engine torque offset as the target engine torque;

setting a target engine torque according to the current battery remaining capacity and the battery target capacity in response to the current torque demand being greater than the second torque and less than the first torque;

Taking the difference between the current torque demand value and the target engine torque as the target motor torque;

the first torque is the torque corresponding to the upper economic limit of the engine, and the second torque is the torque corresponding to the lower economic limit of the engine.

Further, setting a target engine torque according to the current battery remaining capacity and the battery target capacity, including:

in response to the difference between the current battery remaining capacity and the battery target capacity being greater than or equal to a fifth preset value, taking the sum of the current torque demand and the previous engine torque offset as the target engine torque;

and taking the sum of the first torque and the current engine torque offset as the target engine torque in response to the difference between the current battery remaining capacity and the battery target capacity being smaller than a fifth preset value.

Further, in response to the target engine torque being greater than a torque corresponding to an upper engine economy limit, updating the target engine torque with the torque corresponding to the upper engine economy limit;

in response to the target engine torque being less than the torque corresponding to the lower engine economy limit, updating the target engine torque with the torque corresponding to the lower engine economy limit;

the difference between the current torque demand value and the updated target engine torque is taken as the target motor torque.

In a second aspect, there is provided a torque setting device for a hybrid vehicle, including:

the parameter acquisition module is used for acquiring the current battery pack residual capacity, the current running condition and the current torque requirement value of the vehicle under the parallel condition every interval adjustment period;

the offset acquisition module is used for acquiring the current engine torque offset according to the current battery pack residual capacity and the current running working condition;

and the target torque setting module is used for setting target engine torque and target motor torque according to the current residual capacity of the battery pack, the current torque demand value and the current engine torque offset.

In a third aspect, a computer-readable storage medium is provided, on which a hybrid vehicle torque setting program is stored, which when executed by a processor, implements the hybrid vehicle torque setting method described in the first aspect.

In a fourth aspect, a hybrid vehicle torque setting system is provided, including a memory, a processor, and a hybrid vehicle torque setting program stored on the memory and operable on the processor, wherein the processor implements the hybrid vehicle torque setting method described in the first aspect when executing the hybrid vehicle torque setting program.

A fifth aspect provides a hybrid vehicle including the hybrid vehicle torque setting system according to the fourth aspect.

The technical scheme provided by the embodiment of the invention has the beneficial effects that:

1. by implementing the method for setting the torque of the hybrid electric vehicle disclosed by the embodiment of the invention, the residual electric quantity of the battery pack can be close to the user setting under the condition that the residual electric quantity of the battery pack is set by the user, and the engine torque is kept in an economic area all the time;

2. the performance setting of the hybrid electric vehicle by a user is met, and the user experience is improved;

3. the fuel oil energy efficiency is ensured, and the fuel consumption is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a method for torque setting for a hybrid vehicle according to an embodiment of the present invention;

FIG. 2 is a schematic illustration of an engine economy area provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram of a torque setting device for a hybrid vehicle according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a torque setting system of a hybrid vehicle according to an embodiment of the present invention.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some examples of the present invention, not all examples. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Unless defined otherwise, technical or scientific terms used in this disclosure should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, the terms "a," "an," or "the" and similar terms do not denote a limitation of quantity, but rather denote the presence of at least one. The numerals in the drawings of the specification merely denote distinction of respective functional components or modules, and do not denote logical relationships between the components or modules. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

Hereinafter, various embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings. Note that in the drawings, the same reference numerals are given to constituent parts having substantially the same or similar structures and functions, and repeated description thereof will be omitted.

Aiming at the problems that the residual capacity of the battery pack approaches to the user setting and the engine torque is always in the range of an economic zone when the residual capacity of the battery pack is set by the user in the hybrid electric vehicle, the invention provides the following implementation modes:

in some embodiments, as shown in fig. 1, a hybrid vehicle torque setting method includes:

s100: and acquiring the current battery pack residual capacity, the current running working condition and the current torque requirement value of the vehicle under the parallel working condition at each interval of adjustment period, wherein the current running working condition comprises the following steps: the first driving working condition, the second driving working condition and the third driving working condition;

s200: acquiring a current engine torque offset according to the current battery pack residual electric quantity and the current running working condition;

s300: and setting a target engine torque and a target motor torque according to the current battery pack residual capacity, the current torque demand value and the current engine torque offset.

The adjustment period represents a time interval for adjusting the vehicle engine or motor. May be 10ms or 20ms, or any time-indicative value that is custom. Because torque relates to vehicle dynamics, there is a high processing priority, and timeliness requirement. Therefore, the preferable adjustment period is 10ms or 20ms, which not only ensures the continuity of torque change, but also does not occupy the operation resource excessively.

The current battery pack remaining Charge (SOC), which is the ratio of the current remaining dischargeable Charge of the battery pack to its full Charge State Charge, is usually expressed as a percentage.

The current running condition of the vehicle indicates the road condition under which the vehicle is running. The vehicle runs under different road conditions, and the torque configuration of the engine and the motor is different; the first driving condition corresponds to a high-speed driving condition, the second driving condition corresponds to an uphill driving condition, and the third driving condition corresponds to a downhill driving condition.

The current torque demand value represents the end torque of the whole vehicle axle required for supplying the current vehicle operation (including the operation of the in-vehicle electronic device), and is determined according to the pedal opening and the current vehicle speed.

The current engine torque offset represents a correction value that optimizes the vehicle engine torque during the current adjustment period. The method is used for correcting the engine torque and the motor torque in the current adjustment period, and the engine torque and the motor torque are corrected through the engine torque offset, so that the setting requirement of a user on the target electric quantity of the battery pack, the vehicle performance and the energy-saving requirement can be balanced.

The target engine torque, which represents the engine torque corrected by the current engine torque offset, is an ideal value. And driving the vehicle engine according to the target engine torque in the current adjustment period.

The target motor torque, which represents the difference between the current torque demand and the target engine torque, is an ideal value. And driving the vehicle motor according to the target motor torque in the current adjustment period.

The vehicle engine and the motor work in a mutually matched mode according to the target engine torque and the target motor torque, and the residual electric quantity of the current battery pack is kept at or approaching to the target electric quantity of the battery pack set by a user on the premise of ensuring normal operation of the vehicle. By correcting the torque offset, the engine torque can be optimized to balance the user's set demand for the battery pack target charge, as well as the vehicle performance and energy conservation demands.

In the embodiment of the present invention, in order to facilitate the description of the inventive concept and the technical solution, the torque conversion process is simplified, and if not specifically described, the torque related in the embodiment of the present invention is uniformly measured by the torque at the shaft end of the engine.

The conversion between the wheel end torque and the shaft end torque is completed through corresponding driving transformation ratio. For example: the axle end torque generated by the engine can be converted into the corresponding wheel end torque generated by the engine through the engine driving transformation ratio; the shaft end torque generated by the motor is converted into the corresponding wheel end torque generated by the motor through the motor driving transformation ratio.

Engine drive ratio = engine generated wheel end torque +.

Motor drive ratio = motor generated wheel end torque +.motor generated shaft end torque

In other embodiments, the hybrid vehicle torque setting method further comprises:

s400: the vehicle engine is driven to generate an actual engine torque according to the target engine torque, and the vehicle motor is driven to generate an actual motor torque according to the target motor torque, wherein the difference between the actual engine torque and the target engine torque is within a first error range, and the difference between the actual motor torque and the target motor torque is within a second error range.

The actual engine torque, which is the torque actually generated by the engine, is obtained by driving the vehicle engine according to the target engine torque. There is a first error between the actual engine torque and the target engine torque, typically a first error range of + -5%.

The actual motor torque is the torque actually generated by the motor, and is obtained by driving the motor of the vehicle according to the target motor torque. There is a second error between the actual motor torque and the target motor torque, typically a second error range of + -5%.

According to the current battery pack residual capacity and the current running working condition, the current engine torque offset is obtained, and the method comprises the following steps:

s210: acquiring an electric quantity torque offset according to the current residual electric quantity of the battery pack, wherein the electric quantity torque offset comprises: a first electrical quantity torque offset, a second electrical quantity torque offset;

s220: acquiring a working condition torque offset according to the current running working condition, wherein the working condition torque offset comprises: the first working condition torque offset, the second working condition torque offset and the third working condition torque offset;

s230: and taking the sum of the electric quantity torque offset and the working condition torque offset as the current engine torque offset.

The application evaluates the current engine torque offset from the two angles of the current battery pack residual capacity and the current running working condition.

The charge torque offset represents a component of the current engine torque offset caused by the current battery pack remaining charge. The electric quantity torque offset includes: the first electric quantity torque offset and the second electric quantity torque offset.

The first electric quantity torque offset represents a correction value of corresponding engine torque when the difference between the current residual electric quantity of the battery pack and the target electric quantity of the battery pack set by a user is larger than a first preset value; and the second electric quantity torque offset represents a correction value of the corresponding engine torque when the difference between the current residual electric quantity of the battery pack and the target electric quantity of the battery pack set by the user is smaller than or equal to a first preset value. Because the conditions for the first and second charge torque offsets are mutually exclusive, the charge torque offset includes only one of the first and second charge torque offsets.

A first operating condition torque offset representing a correction value of the corresponding engine torque corresponding to a first operating condition (high-speed operating condition); a second operating condition torque offset representing a correction value of the corresponding engine torque corresponding to a second running condition (an uphill running condition); the third operating condition torque offset represents a correction value of the corresponding engine torque corresponding to the third operating condition (downhill operating condition). The second driving condition is generally mutually exclusive with the applicable condition of the first driving condition or the third driving condition. That is, the second running condition does not occur simultaneously with the first running condition or the third running condition. And for the conditions of the first driving working condition and the third driving working condition which possibly occur simultaneously, corresponding torque offset of the first working condition and torque offset of the third working condition are calculated respectively, and then superposition is carried out.

And finally, superposing the electric quantity torque offset and the working condition torque offset to serve as the current engine torque offset. The current engine torque offset is expressed as:T _OFFSET =T _E +T _C，

wherein, the liquid crystal display device comprises a liquid crystal display device,T _OFFSET indicating the current engine torque offset amount,T _E the amount of electrical quantity torque offset is indicated,T _C indicating the operating mode torque offset. The engine torque is adjusted through the current engine torque offset, so that the current battery pack residual capacity is close to the battery pack target capacity set by a user, and the user experience is improved.

Obtaining the electric quantity torque offset according to the current residual electric quantity of the battery pack comprises the following steps:

s211: responding to the difference between the current battery pack residual capacity and the battery pack target capacity is larger than a first preset value, acquiring a corresponding first electric quantity torque offset according to the difference between the current battery pack residual capacity and the battery pack target capacity and a first comparison table, and taking the first electric quantity torque offset as an electric quantity torque offset, wherein the battery pack target capacity is set by a user;

s211': and responding to the difference between the current battery pack residual capacity and the battery pack target capacity is smaller than or equal to a first preset value, acquiring a corresponding second electric quantity torque offset according to the difference between the current battery pack residual capacity and the battery pack target capacity and a second comparison table, and taking the second electric quantity torque offset as an electric quantity torque offset.

As shown in table 1, the first comparison table records the corresponding numerical relationship between the difference between the current battery pack remaining capacity and the battery pack target capacity and the first capacity torque offset when the difference (Δsoc) between the current battery pack remaining capacity and the battery pack target capacity is greater than a first preset value; according to the record, when the difference between the current residual electric quantity of the battery pack and the target electric quantity of the battery pack is larger than a first preset value, the second electric quantity torque offset is not existed, and when the current engine torque offset is calculated in a superposition mode, the second electric quantity torque offset is recorded as 0.

In table 1, the sign of the first charge torque offset is negative, indicating that the torque of the engine is reduced, and the reduced portion has motor compensation, thereby increasing the consumption of the remaining battery charge, and making the current remaining battery charge approach the target battery charge.

TABLE 1 corresponding numerical relationship of ΔSOC and first electric quantity torque offset

As shown in table 2, the second comparison table records the corresponding numerical relationship between the difference between the current battery pack remaining capacity and the battery pack target capacity and the torque offset of the second capacity when the difference between the current battery pack remaining capacity and the battery pack target capacity is smaller than or equal to the first preset value. According to the above description, when the difference between the current battery remaining capacity and the battery target capacity is smaller than or equal to a first preset value, the first capacity torque offset is not present, and when the current engine torque offset is calculated in a superposition mode, the first capacity torque offset is recorded as 0.

Preferably, the first preset value is 0.

TABLE 2 corresponding numerical relationship of ΔSOC and second electric quantity torque offset

The first comparison table and the second comparison table are all measured through experiments, and are obtained through calibration under the condition of different differences between the residual electric quantity of the current battery pack and the target electric quantity of the battery pack. And after the engine torque is adjusted by the corresponding torque offset, the trend of the current battery pack residual electric quantity to the target electric quantity close to the battery pack changes. In the experiment, the torque offset corresponding to the sampling point is accurately measured. In the actual running process of the vehicle, if the actual monitoring value is between the sampling points, the torque offset corresponding to the monitoring value is obtained by adopting an interpolation method based on the data of table 1 or table 2.

In table 2, the sign of the second charge torque offset is positive, indicating that the torque of the engine is increased to compensate for the torque generated by the motor, thereby charging the battery pack. Because the second electric quantity torque offset is generated under the condition that the delta SOC is less than or equal to 0, and the current residual electric quantity of the battery pack is smaller than the target electric quantity of the battery pack. Therefore, the current battery remaining capacity can be made to approach the battery target capacity by charging.

In other embodiments, the electric torque offset further includes an accessory drive torque;

s212: responsive to the current battery remaining charge being less than a second preset value, and/or

s213: obtaining an accessory driving torque according to the current accessory power and the current engine speed;

s214: the accessory drive torque and the sum of the first charge torque offset or the second charge torque offset are taken as the charge torque offset.

The second preset value and the third preset value are usually expressed as percentages, and can be set according to requirements.

Preferably, the second preset value is 20%; the third preset value is-10%.

The current accessory power can be calculated by the following formula:

P =P _DCDC +P _PTC +P _CMPR

wherein, the liquid crystal display device comprises a liquid crystal display device,Pindicating the current accessory power level,P _DCDC which is indicative of the power of the dc converter,P _PTC indicating the power of the heater and,P _CMPR representing compressor power.

The formula applies:

T _A =P × 9550 ÷S _ENG

the accessory drive torque may be obtained from a current accessory power and a current engine speed. Wherein, the liquid crystal display device comprises a liquid crystal display device,T _A representing accessory drive torque;S _ENG the current engine speed is obtained according to the current motor speed, the motor driving transformation ratio and the engine driving transformation ratio, and the current motor speed can be obtained according to the current vehicle speed of the corresponding vehicle type.

Specifically:

S _ENG =S _MOT x (Engine drive ratio/Motor drive ratio)

S _MOT = （V÷L) Motor drive ratio

Wherein, the liquid crystal display device comprises a liquid crystal display device,Vfor the current vehicle speed,Lfor the circumference of the tire, the tire is provided with a tire groove,S _MOT is the motor speed.

From this, the amount of electric torque offset can be expressed by the following formula:

T _E =T _E1 +T _E2 +T _A

wherein, the liquid crystal display device comprises a liquid crystal display device,T _E1 indicating a first amount of charge torque offset,T _E2 representing a second charge torque offset. For mutually exclusive applicable conditions, the torque corresponding to the non-occurrence is recorded as 0.

Acquiring the working condition torque offset according to the current driving working condition, including:

s221: responding to the fact that the current vehicle speed is greater than a first preset vehicle speed, the current average vehicle speed is greater than a second preset vehicle speed, and the current average gradient is smaller than or equal to the first preset gradient, and acquiring corresponding torque offset of the first working condition according to the current vehicle speed and a third comparison table;

s222: responding to the fact that the current average gradient is larger than the first preset gradient and the current average pedal opening is larger than the first preset opening, acquiring a corresponding second working condition torque offset according to the instantaneous gradient of the vehicle and a fourth comparison table;

s223: responding to the fact that the current average gradient is smaller than the second preset gradient, the current average pedal opening is smaller than the second preset opening, and the difference between the current battery pack residual capacity and the battery pack target electric quantity is smaller than or equal to a fourth preset value, and obtaining a corresponding third working condition torque offset according to the vehicle instantaneous gradient and a fifth comparison table;

S224: and taking the sum of the first working condition torque offset, the second working condition torque offset and the third working condition torque offset as the working condition torque offset.

The first preset speed is a preset speed and is used for measuring the current instantaneous speed of the vehicle.

Preferably, the first preset vehicle speed is 100km/h (kilometer per hour).

The second preset speed is a preset speed and is used for measuring the average speed of the vehicle.

Preferably, the second preset vehicle speed is 80km/h. The vehicle average speed is obtained by averaging the acquired instantaneous vehicle speed at sampling points set at every interval of 0.01s within 30s (seconds). The instantaneous vehicle speed may be obtained by a speed sensor. The application is not limited to a specific mode for calculating the average speed of the vehicle, and the average speed of the vehicle can be obtained by adopting different sampling time periods and sampling intervals to calculate the average speed of the vehicle; or can be obtained by adopting different calculation methods.

The current average gradient is a preset gradient value and is used for measuring the average gradient of the running road condition of the vehicle.

Preferably, the current average gradient is 2 °; the current average gradient is obtained by averaging the acquired instantaneous gradient at sampling points set at every interval of 0.01s within 30 s. The instantaneous grade may be obtained by a grade sensor. The application is not limited to a specific mode for calculating the current average gradient, and the current average gradient can be obtained by adopting different sampling time periods and sampling intervals to average the instantaneous gradient; or can be obtained by adopting different calculation methods.

The first preset gradient and the second preset gradient are preset gradients.

Preferably, the first preset gradient is 2 °; the second preset gradient is-2 deg..

The first preset opening degree and the second preset opening degree are preset pedal opening degrees and are used for measuring the current power demand of the vehicle, and the current power demand is usually expressed in percentage.

Preferably, the first preset opening is 30%; the second preset opening is 20%.

The fourth preset value is typically expressed as a percentage and may be set as desired.

Preferably, the fourth preset value is 0.

The operating torque offset may be represented by:

T _C =T _C1 +T _C2 +T _C3

wherein, the liquid crystal display device comprises a liquid crystal display device,T _C1 indicating a torque offset for the first operating condition,T _C2 indicating a torque offset for the second operating condition,T _C3 indicating a third operating mode torque offset. For mutually exclusive applicable conditions, the torque corresponding to the non-occurrence is recorded as 0.

As shown in table 3, the third table describes the correspondence between the current vehicle speed and the torque offset under the first condition.

As shown in Table 4, the fourth table shows the corresponding numerical relationship between the different instantaneous grades and the second operating mode torque offset.

As shown in Table 5, the fifth table shows the corresponding numerical relationship between the different instantaneous grades and the third-operating-mode torque offset.

The third comparison table, the fourth comparison table and the fifth comparison table are all measured through experiments and are obtained through calibration under different driving working conditions. And after the engine torque is adjusted by the corresponding torque offset, the trend of the current battery pack residual electric quantity to the target electric quantity close to the battery pack changes. In the experiment, the torque offset corresponding to the sampling point is accurately measured. During actual running of the vehicle, if the actual monitored value is between the sampling points, the torque offset corresponding to the monitored value is obtained by interpolation based on the data in tables 3, 4 and 5.

TABLE 3 corresponding numerical relationship between the current vehicle speed and the torque offset for the first operating condition

TABLE 4 corresponding numerical relationship between current grade and second operating mode torque offset

TABLE 5 corresponding numerical relationship between current grade and third operating mode torque offset

And the first to fifth comparison tables evaluate the offset from two aspects of electric quantity and working condition and superimpose the final results. By means of the comparison table, when the offset is considered, the electric quantity or the working condition can be considered independently, the two are not required to be coupled together for evaluation, and the total current engine torque offset can be obtained only by superposing the results of the respective evaluation at last. In tables 3-5, the torque offset is positive, indicating that the engine will compensate the motor torque, delay the consumption of the remaining battery, or charge the battery; when the torque offset is negative, it means that the battery pack provides power to the motor so that the motor will compensate for the engine torque to increase the power consumption.

And setting a correction value which is inconsistent with the actual state of the vehicle to zero for the mutual exclusion condition of the current battery pack residual capacity or the current running working condition. For example: the first electric torque offset is zero when the SOC is greater than zero.

Setting a target engine torque and a target motor torque according to a current battery pack remaining capacity, a current torque demand value, and a current engine torque offset, comprising:

s310: in response to the current torque demand being greater than the first torque, taking the sum of the first torque and the current engine torque offset as the target engine torque;

s320: in response to the current torque demand being less than the second torque, taking the sum of the second torque and the current engine torque offset as the target engine torque;

s330: setting a target engine torque according to the current battery remaining capacity and the battery target capacity in response to the current torque demand being greater than the second torque and less than the first torque;

s340: taking the difference between the current torque demand value and the target engine torque as the target motor torque;

The engine economy zone represents a curve obtained by calibrating torques corresponding to different engine speeds under the optimal oil-to-electricity efficiency, an optimal torque curve exists at the same speed, and the torque zone is defined by the upper engine economy limit and the lower engine economy limit together, as shown in fig. 2. Wherein, the liquid crystal display device comprises a liquid crystal display device,T _ECOH indicating the torque corresponding to the upper economic limit of the engine,T _ECOL indicating the torque corresponding to the lower economic limit of the engine.

The current torque demand value is greater than the first torqueT _REQ >T _ECOH ) When (1):

T _ENG =T _ECOH +T _OFFSET

T _M =T _REQ -T _ENG

wherein, the liquid crystal display device comprises a liquid crystal display device,T _REQ which represents the current torque demand value,T _ENG indicating that the target engine torque is to be applied,T _M indicating the target motor torque.

The current torque demand value is smaller than the second torqueT _REQ <T _ECOL ) When (1):

T _ENG =T _ECOL +T _OFFSET

T _M =T _REQ -T _ENG

when (when)T _ECOL <T _REQ <T _ECOH When the current battery pack residual capacity and the battery pack target capacity are needed to be set, the method specifically comprises the following steps:

s331: in response to the difference between the current battery remaining capacity and the battery target capacity being greater than or equal to a fifth preset value, taking the sum of the current torque demand and the current engine torque offset as the target engine torque;

s331': and taking the sum of the first torque and the current engine torque offset as the target engine torque in response to the difference between the current battery remaining capacity and the battery target capacity being smaller than a fifth preset value.

Preferably, the fifth preset value is 0.

When delta SOC is more than or equal to 0:

T _ENG =T _REQ +T _OFFSET

T _M =T _REQ -T _ENG

when the delta SOC is <0,

T _ENG =T _ECOH +T _OFFSET

T _M =T _REQ -T _ENG

in order to ensure that the engine always works under the working condition of optimal oil-to-electricity efficiency, the current engine torque offset is adoptedT _OFFSET After correcting the engine torque, the target engine torqueT _ENG When the torque interval defined by the upper and lower engine economy limits is exceeded, the adjacent upper or lower engine economy limit is set as the target engine torque.

S332: in response to the target engine torque being greater than a torque corresponding to an upper engine economy limit, updating the target engine torque with the torque corresponding to the upper engine economy limit;

s332': in response to the target engine torque being less than the torque corresponding to the lower engine economy limit, updating the target engine torque with the torque corresponding to the lower engine economy limit;

the difference between the current torque demand value and the updated target engine torque is taken as the target motor torque. So as to ensure that the engine works under the working condition of optimal oil-to-electricity efficiency and reduce the oil consumption.

In some embodiments, obtaining the current torque demand value includes: and obtaining a current torque demand value according to the current pedal opening and the current vehicle speed, wherein the current torque demand value is the wheel end torque of the whole vehicle.

Table 6 shows a correspondence relationship of the current pedal opening, the current vehicle speed, and the current torque demand value. The correspondence relationship between different vehicle types is different, and the application is not limited.

TABLE 6 Whole vehicle torque demand and pedal opening and vehicle speed relationship

Referring to Table 6, taking the vehicle speed of 80km/h as an example, the pedal opening 30%, the current torque demand value is 1320 N.m.

In other embodiments, as shown in FIG. 3, a hybrid vehicle torque setting device includes:

the parameter acquisition module is used for acquiring the current battery pack residual capacity, the current running working condition and the current torque requirement value of the vehicle under the parallel working condition at each interval of adjustment period, wherein the current running working condition comprises: the first driving working condition, the second driving working condition and the third driving working condition;

The specific limitation regarding the torque setting device of the hybrid vehicle may be referred to the limitation regarding the storage space allocation method hereinabove, and will not be described in detail herein. The respective modules in the above-described hybrid vehicle torque setting device may be implemented in whole or in part by software, hardware, and a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.

In other embodiments, a computer readable storage medium having stored thereon a hybrid vehicle torque setting program that when executed by a processor implements the hybrid vehicle torque setting method of the first aspect described above.

In other embodiments, as shown in fig. 4, a hybrid vehicle torque setting system includes a memory, a processor, and a hybrid vehicle torque setting program stored in the memory and executable on the processor, where the processor executes the hybrid vehicle torque setting program to implement the hybrid vehicle torque setting method described in the first aspect. The network interface can perform bidirectional data transmission with external equipment, and double arrows in the figure represent bidirectional data transmission functions of the network interface. In fig. 4, the specific external devices for bi-directional data transmission with the network interface are not shown.

In other embodiments, a hybrid vehicle includes the hybrid vehicle torque setting system of the fourth aspect described above.

By implementing the method for setting the torque of the hybrid electric vehicle disclosed by the embodiment of the invention, the residual electric quantity of the battery pack can be close to the user setting under the condition that the residual electric quantity of the battery pack is set by the user, and the engine torque is kept in an economic area all the time; the performance setting of the hybrid electric vehicle by a user is met, and the user experience is improved; the fuel oil energy efficiency is ensured, and the fuel consumption is reduced.

Any combination of the above optional solutions may be adopted to form an optional embodiment of the present invention, which is not described herein.

Example 1

A hybrid vehicle torque setting method, as shown in fig. 1, includes:

Example two

A hybrid vehicle torque setting method, comprising:

s100: and acquiring the current battery pack residual capacity, the current running working condition and the current torque requirement value of the vehicle under the parallel working condition at each interval of adjustment period, wherein the current running working condition comprises the following steps: the first driving working condition, the second driving working condition and the third driving working condition; the current torque demand value is obtained from the current pedal opening and the current vehicle speed.

Example III

A torque setting device of a hybrid vehicle, as shown in fig. 3, includes:

Example IV

A computer-readable storage medium, on which a hybrid vehicle torque setting program is stored, implements the hybrid vehicle torque setting method described in the second embodiment when the hybrid vehicle torque setting program is executed by a processor, and is not described in detail herein.

Example five

As shown in fig. 4, the hybrid vehicle torque setting system includes a memory, a processor, and a hybrid vehicle torque setting program stored in the memory and operable on the processor, and when the processor executes the hybrid vehicle torque setting program, the hybrid vehicle torque setting method described in the first aspect is implemented, and the hybrid vehicle torque setting method is not described herein.

Example six

A hybrid vehicle includes a hybrid vehicle torque setting system according to the sixth embodiment, and the hybrid vehicle torque setting system includes a memory, a processor, and a hybrid vehicle torque setting program stored in the memory and operable on the processor, wherein the hybrid vehicle torque setting method according to the first aspect is implemented when the processor executes the hybrid vehicle torque setting program, and the hybrid vehicle torque setting method is not described herein.

In particular, according to embodiments of the present application, the processes described above with reference to flowcharts may be implemented as computer software programs. For example, embodiments of the present application include a computer program product comprising a computer program loaded on a computer readable medium, the computer program comprising program code for performing the method shown in the flowcharts. In such an embodiment, the computer program may be downloaded and installed from a network via a communication device, or from memory, or from ROM. The above-described functions defined in the method of the embodiment of the present application are performed when the computer program is executed by an external processor.

It should be noted that, the computer readable medium of the embodiments of the present application may be a computer readable signal medium or a computer readable storage medium, or any combination of the two. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In embodiments of the present application, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In contrast, in embodiments of the present application, the computer-readable signal medium may comprise a data signal propagated in baseband or as part of a carrier wave, with the computer-readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: electrical wires, fiber optic cables, RF (Radio Frequency), and the like, or any suitable combination thereof.

The computer readable medium may be contained in the server; or may exist alone without being assembled into the server. The computer readable medium carries one or more programs which, when executed by the server, cause the server to: acquiring a frame rate of an application on the terminal in response to detecting that a peripheral mode of the terminal is not activated; when the frame rate meets the screen-extinguishing condition, judging whether a user is acquiring screen information of the terminal; and controlling the screen to enter an immediate dimming mode in response to the judgment result that the user does not acquire the screen information of the terminal.

Computer program code for carrying out operations for embodiments of the present application may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider).

In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for a system or system embodiment, since it is substantially similar to a method embodiment, the description is relatively simple, with reference to the description of the method embodiment being made in part. The systems and system embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present application without undue burden.

The foregoing has outlined rather broadly the more detailed description of the application in order that the detailed description of the application that follows may be better understood, and in order that the present principles and embodiments may be better understood; also, it is within the scope of the present application to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the application.

The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

1. A torque setting method of a hybrid vehicle, characterized by comprising:

acquiring a current engine torque offset according to the current battery pack residual capacity and the current running working condition;

2. The hybrid vehicle torque setting method according to claim 1, characterized in that the method further comprises:

and driving a vehicle engine to generate an actual engine torque according to the target engine torque, and driving a vehicle motor to generate an actual motor torque according to the target motor torque, wherein the difference between the actual engine torque and the target engine torque is within a first error range, and the difference between the actual motor torque and the target motor torque is within a second error range.

3. The method according to claim 1 or 2, characterized in that the obtaining a current engine torque offset according to the current battery pack remaining capacity and the current running condition includes:

obtaining an electric quantity torque offset according to the current residual electric quantity of the battery pack, wherein the electric quantity torque offset comprises: a first electrical quantity torque offset, a second electrical quantity torque offset;

acquiring a working condition torque offset according to the current driving working condition, wherein the working condition torque offset comprises: the first working condition torque offset, the second working condition torque offset and the third working condition torque offset;

4. The hybrid vehicle torque setting method according to claim 3, characterized in that the obtaining the electric quantity torque offset from the current battery pack remaining electric quantity includes:

responding to the difference between the current battery pack residual capacity and the battery pack target capacity is larger than a first preset value, acquiring the corresponding first electric quantity torque offset according to the difference between the current battery pack residual capacity and the battery pack target capacity and a first comparison table, and taking the first electric quantity torque offset as the electric quantity torque offset, wherein the battery pack target capacity is set by a user;

And responding to the difference between the current battery pack residual electric quantity and the battery pack target electric quantity is smaller than or equal to the first preset value, acquiring the corresponding second electric quantity torque offset according to the difference between the current battery pack residual electric quantity and the battery pack target electric quantity and a second comparison table, and taking the second electric quantity torque offset as the electric quantity torque offset.

5. The hybrid vehicle torque setting method of claim 3, wherein the charge torque offset further comprises an accessory drive torque;

the obtaining the electric quantity torque offset according to the current battery pack residual electric quantity further includes:

Acquiring current accessory power if the difference between the current battery pack residual electric quantity and the battery pack target electric quantity is smaller than a third preset value, wherein the current accessory power is the sum of direct current converter power, heater power and compressor power;

and taking the sum of the accessory drive torque and the first electric quantity torque offset or the second electric quantity torque offset as the electric quantity torque offset.

6. The method for setting torque of a hybrid vehicle according to claim 3, wherein said obtaining a working condition torque offset according to said current driving condition includes:

responding to the fact that the current vehicle speed is greater than a first preset vehicle speed, the current average vehicle speed is greater than a second preset vehicle speed, and the current average gradient is smaller than or equal to the first preset gradient, and acquiring a corresponding first working condition torque offset according to the current vehicle speed and a third comparison table;

responding to the fact that the current average gradient is smaller than the second preset gradient, the current average pedal opening is smaller than the second preset opening, and the difference between the current battery pack residual capacity and the battery pack target electric quantity is smaller than or equal to a fourth preset value, and obtaining a corresponding third working condition torque offset according to the current gradient of the vehicle and a fifth comparison table;

7. The hybrid vehicle torque setting method according to claim 1 or 2, characterized in that the setting of the target engine torque and the target motor torque according to the current battery pack remaining amount, the current torque demand value, and the current engine torque offset amount includes:

in response to the current torque demand being greater than a first torque, taking a sum of the first torque and the current engine torque offset as the target engine torque;

in response to the current torque demand being less than a second torque, taking a sum of the second torque and the current engine torque offset as the target engine torque;

setting a target engine torque according to the current battery remaining capacity and a battery target capacity in response to the current torque demand being greater than the second torque and less than the first torque;

8. The hybrid vehicle torque setting method according to claim 7, characterized in that the setting of the target engine torque according to the current battery remaining amount and the battery target amount includes:

in response to the difference between the current battery remaining power and the battery target power being greater than or equal to a fifth preset value, taking the sum of the current torque demand and the current engine torque offset as the target engine torque;

and taking the sum of the first torque and the current engine torque offset as the target engine torque in response to the difference between the current battery remaining capacity and the battery target capacity being smaller than the fifth preset value.

9. The hybrid vehicle torque setting method according to claim 7, characterized in that in response to the target engine torque being greater than a torque corresponding to an upper engine economy limit, the target engine torque is updated with the torque corresponding to the upper engine economy limit;

in response to the target engine torque being less than a torque corresponding to a lower engine economy limit, updating the target engine torque with the torque corresponding to the lower engine economy limit;

And taking the difference between the current torque demand value and the updated target engine torque as the target motor torque.

10. A torque setting device of a hybrid vehicle, characterized by comprising:

the offset acquisition module is used for acquiring the current engine torque offset according to the current battery pack residual electric quantity and the current running working condition;

and the target torque setting module is used for setting target engine torque and target motor torque according to the current battery pack residual capacity, the current torque demand value and the current engine torque offset.

11. A hybrid vehicle comprising a hybrid vehicle torque setting system comprising a memory, a processor, and a hybrid vehicle torque setting program stored on the memory and operable on the processor, wherein the processor, when executing the hybrid vehicle torque setting program, implements the hybrid vehicle torque setting method of any of claims 1-9.