CN118242185A - Engine torque control method, device, transmission controller and storage medium - Google Patents

Abstract

The present disclosure relates to an engine torque control method, apparatus, transmission controller, and storage medium, the method comprising: when the vehicle enters a rapid throttle releasing working condition, entering a torque up control mode; in the torque up control mode, determining a target torque value of the engine based on a current torque value of the engine and a preset slope, wherein the preset slope is larger than an actual torque change rate of the engine; a target torque value is sent to the engine, the target torque value being used to control the output torque of the engine. The present disclosure identifies a condition by the transmission controller and sends a target torque value to the engine to cause the engine to respond to the target torque value to improve the drag feel under tipout conditions.

Description

Engine torque control method, device, transmission controller and storage medium

Technical Field

The present disclosure relates to the technical field of new energy vehicles, and in particular to an engine torque control method, device, transmission controller and storage medium.

Background technique

With the rapid use of automatic transmissions, more and more passenger cars and commercial vehicles are equipped with them. Automatic transmissions bring a lot of convenience to drivers and improve the driving performance and smoothness of the entire vehicle.

In normal vehicle driving, the accelerator pedal is often released quickly, i.e., tipout condition. In tipout condition, the engine torque will drop to 0 or negative torque reverse drag quickly, and the time is about 100ms. During this period, due to the rapid loss of power or negative torque reverse drag of the engine, the vehicle will experience a large deceleration, giving the driver a very serious reverse drag feeling.

The relevant technology can only be improved through engine software optimization and calibration measures. However, depending on the matching engine capabilities and other considerations, it is difficult for some engines to resolve the reverse drag feeling under tipout conditions.

Summary of the invention

In order to solve the above technical problems, the embodiments of the present disclosure provide an engine torque control method, device, transmission controller and storage medium, which improve the reverse drag feeling under tipout conditions by identifying the operating condition through the transmission controller and sending a target torque value to the engine so that the engine responds to the target torque value.

In a first aspect, an embodiment of the present disclosure provides an engine torque control method, which is applied to a transmission controller, including: when the vehicle enters a fast throttle release condition, entering a torque increase control mode; in the torque increase control mode, determining a target torque value of the engine based on a current torque value of the engine and a preset slope, the preset slope being greater than an actual torque change rate of the engine; and sending the target torque value to the engine, the target torque value being used to control the output torque of the engine.

In a second aspect, an embodiment of the present disclosure provides an engine torque control device, which is configured in a transmission controller and includes: a mode entry module, which is used to enter a torque increase control mode when the vehicle enters a fast throttle release condition; a target value calculation module, which is used to determine the target torque value of the engine based on the current torque value of the engine and a preset slope in the torque increase control mode, wherein the preset slope is greater than the actual torque change rate of the engine; and a target value sending module, which is used to send a target torque value to the engine, and the target torque value is used to control the output torque of the engine.

In a third aspect, an embodiment of the present disclosure provides a transmission controller, the transmission controller comprising:

one or more processors;

A storage device for storing one or more programs;

When one or more programs are executed by one or more processors, the one or more processors implement the engine torque control method provided in any one of the first aspects above.

In a fourth aspect, an embodiment of the present disclosure provides a vehicle, comprising a transmission controller as described in the third aspect above.

In a fifth aspect, an embodiment of the present disclosure provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements an engine torque control method as provided in any one of the first aspects above.

The embodiment of the present disclosure provides an engine torque control method, device, transmission controller and storage medium, the method comprising: when the vehicle enters a fast throttle release condition, entering a torque increase control mode; in the torque increase control mode, determining the target torque value of the engine based on the current torque value of the engine and a preset slope, the preset slope being greater than the actual torque change rate of the engine; sending the target torque value to the engine, the target torque value being used to control the output torque of the engine. In the present disclosure, the transmission controller identifies the working condition and sends the target torque value to the engine, so that the engine responds to the target torque value and controls the rate of decrease of the engine torque, thereby improving the reverse drag feeling under the tipout condition.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the accompanying drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and the originals and elements are not necessarily drawn to scale.

FIG1 is a schematic flow chart of an engine torque control method in an embodiment of the present disclosure;

FIG2 is a flow chart of another engine torque control method in an embodiment of the present disclosure;

FIG3 is a schematic diagram of a torque increase request strategy provided by an embodiment of the present disclosure;

FIG4 is a schematic structural diagram of an engine torque control device in an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of the structure of an electronic device in an embodiment of the present disclosure.

Detailed ways

Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments described herein, which are instead provided for a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

It should be understood that the various steps described in the method embodiments of the present disclosure may be performed in different orders and/or in parallel. In addition, the method embodiments may include additional steps and/or omit the steps shown. The scope of the present disclosure is not limited in this respect.

The term "including" and its variations used herein are open inclusions, i.e., "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the following description.

It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

The names of the messages or information exchanged between multiple devices in the embodiments of the present disclosure are only used for illustrative purposes and are not used to limit the scope of these messages or information.

Figure 1 is a flow chart of an engine torque control method in an embodiment of the present disclosure. This embodiment can be applicable to the situation of controlling engine torque in the field of new energy vehicles. The method can be executed by an engine torque control device, which can be implemented by software and/or hardware. The engine torque control device can be configured in a transmission controller.

Among them, the transmission is also called an automatic transmission. Compared with the manual transmission, the transmission is a transmission device that can automatically shift gears according to the vehicle speed and engine speed. The transmission controller is also called the Transmission Control Unit (TCU), which is the core component of the automatic transmission. It is commonly found in automatic transmissions such as AMT, AT, DCT, and CVT. It uses computers and power electronic drive technology to realize the automatic shifting function of the vehicle. This not only saves the driver from the trouble of manual shifting, but also reduces the risk of accidents caused by human error. The precise control of TCU can save shifting time, improve driving safety, and bring great convenience to people's driving life.

As shown in FIG. 1 , the engine torque control method provided in the embodiment of the present disclosure mainly includes steps S101 - S102 .

S101. When the vehicle enters a fast accelerator release condition, the torque increase control mode is entered.

First, the application scenario of the engine torque control method provided by the embodiment of the present disclosure is described. As introduced in the background technology, some engines can improve the feeling of reverse drag under tipout conditions through software optimization and calibration measures in the engine. It is difficult for some engines to improve the feeling of reverse drag under tipout conditions through software optimization and calibration measures in the engine. The engine torque control method provided by the embodiment of the present disclosure is mainly used in situations where the engine cannot improve the feeling of reverse drag under tipout conditions through software optimization and calibration measures in the engine.

Therefore, a torque control switch timc_flg_TqIncEnable is set in the transmission controller. If the torque control switch timc_flg_TqIncEnable is in the on state, the engine torque control method provided by the present disclosure is used to control the engine torque during vehicle driving. If the torque control switch timc_flg_TqIncEnable is in the off state, the engine torque control method provided by the embodiment of the present disclosure is not executed. The state of the torque control switch timc_flg_TqIncEnable is set by the R&D personnel before the vehicle leaves the factory, according to the engine model and vehicle model requirements, to determine whether the torque control switch timc_flg_TqIncEnable is on.

In one possible implementation, a two-stage torque control switch is set, the first-stage torque control switch timc_flg_TqIncEnable is the master control switch, the second-stage torque control switch timc_flg_TqIncEnable* is the sub-control switch, and the second-stage torque control switch timc_flg_TqIncEnable* is used to control whether each gear adopts the engine torque control scheme provided by the present disclosure. A corresponding second-stage torque control switch timc_flg_TqIncEnable* is set for each gear. For example: the gearbox has 8 gears, and 8 second-stage torque control switches timc_flg_TqIncEnable* are set. R&D personnel match different vehicle models and determine whether the TipOut conditions of different gears adopt the engine torque control scheme provided by the present disclosure according to needs. Generally, this function will not be turned on in N gear.

If the first-stage torque control switch timc_flg_TqIncEnable is in the closed state, the state of the second-stage torque control switch will no longer be determined, and the engine torque control scheme provided by the present disclosure will not be adopted directly. If the first-stage torque control switch timc_flg_TqIncEnable is in the open state, the state of the second-stage torque control switch corresponding to each gear position will be determined. According to the state of the second-stage torque control switch corresponding to each gear position and the current gear position of the gearbox, it is determined whether to adopt the engine torque control scheme provided by the present disclosure. Specifically, the second-stage torque control switch timc_flg_TqIncEnable* corresponding to the current gear position of the gearbox is in the open state, and the engine torque control scheme provided by the present disclosure is adopted to control the torque of the engine. The second-stage torque control switch timc_flg_TqIncEnable* corresponding to the current gear position of the gearbox is in the closed state, and the engine torque control scheme provided by the present disclosure is not adopted.

For example: the first-stage torque control switch timc_flg_TqIncEnable is set to the on state, the second-stage torque control switch timc_flg_TqIncEnable* corresponding to the 1st gear, the 2nd gear, and the 3rd gear is set to the off state, and the second-stage torque control switch timc_flg_TqIncEnable* corresponding to the 4th gear, the 5th gear, the 6th gear, the 7th gear, and the 8th gear is set to the on state, then, when the gearbox is in the 1st gear, the 2nd gear, or the 3rd gear, the engine torque control scheme provided by the present disclosure is not adopted. When the gearbox is in the 4th gear, the 5th gear, the 6th gear, the 7th gear, or the 8th gear, the engine torque control scheme provided by the present disclosure is adopted to control the engine torque.

Whether the engine torque control method is adopted is determined by the states of the first-level torque control switch timc_flg_TqIncEnable and the second-level torque control switch timc_flg_TqIncEnable*. If it is determined that the engine torque control method is adopted, the engine torque control method adopted in the embodiment of the present disclosure is executed during vehicle driving.

The vehicle is a vehicle that is being driven by the driver. The quick throttle release condition, also known as the tipout condition, can be understood as releasing the throttle input in a very short time, the throttle opening changes by more than 50%, and the throttle change rate (throttle travel change per second) exceeds 100%. For example: if you release the throttle travel by 50% in 0.5 seconds, the throttle change rate is 100%.

When it is determined that the engine torque is controlled by the engine torque control method, the vehicle driving parameters are periodically collected during the vehicle driving process; when the vehicle driving parameters meet the set conditions, it is determined that the vehicle enters a fast throttle release condition.

The vehicle's driving parameters include throttle opening, engine torque, gear shifting progress during the gear shifting process, etc.

The following describes how to determine whether the vehicle has entered a quick throttle release condition.

There are three main judgment conditions for determining whether the vehicle enters the rapid throttle release condition: triggering the first set condition, the duration being within the first duration threshold, and the gear shifting process condition.

The trigger condition can be understood as triggering the first set condition. Only when the first set condition is triggered, will it be determined whether to determine the continuous condition and the state condition.

First, the triggering of the first setting condition will be described.

The first setting condition includes four conditions: the throttle deceleration condition is met; the vehicle is in an unpowered state and the current torque of the engine is less than a first threshold; the current torque of the engine is greater than the first threshold.

Among them, the throttle deceleration condition being met can be understood as a large change in the throttle opening value in a short period of time. Specifically, the throttle opening value in the current sampling period and the throttle opening value N sampling periods ago are obtained. If the throttle opening value in the current sampling period is less than the throttle opening value N sampling periods ago, it means that the throttle deceleration condition is met. If the throttle opening value in the current sampling period is greater than or equal to the throttle opening value N sampling periods ago, it means that the throttle deceleration condition is not met. N can be set according to actual conditions. For example: N can be preferably 5.

The vehicle being in an unpowered state can be understood as the current engine not providing driving force to the vehicle. There are two ways to determine whether the vehicle is in an unpowered state.

The first method is to determine whether the throttle opening is less than a first opening threshold. When the throttle opening is less than the first opening threshold, the vehicle is determined to be in an unpowered state. Optionally, the first opening threshold is 2%. When the throttle opening is less than 2%, the vehicle is determined to be in an unpowered state.

The second method: read the vehicle's off-power state flag idrd_flg_PowerOnAccActive, and when the off-power state flag idrd_flg_PowerOnAccActive is 1, determine that the vehicle is in an off-power state.

The current torque of the engine refers to the torque value of the engine detected in the current sampling period. The first threshold is greater than the second threshold, and optionally, the first threshold is 100Nm and the second threshold is 20Nm. That is, the current torque of the engine is less than 100Nm, and the current torque of the engine is greater than 20Nm.

When the four conditions included in the above-mentioned first setting condition are satisfied at the same time, it is determined whether the continuation condition is satisfied.

Secondly, it is explained whether the vehicle parameters meet the duration within the first duration threshold.

The above-mentioned continuous conditions mainly include two conditions: the continuous condition of the current torque of the engine, and the continuous condition of the throttle opening.

When the first set condition is triggered, timing starts to record the first duration during which the current torque of the engine is less than the first threshold, and the second duration during which the throttle opening is less than the first opening threshold; and determine whether the first duration and the second duration are within the first duration threshold.

If both the first duration and the second duration are within the first duration threshold, it is determined that the continuation condition is satisfied. If either the first duration or the second duration is not within the first duration threshold, it is determined that the vehicle is not in the tipout condition.

The first duration threshold can be set according to the situation, and optionally, the first duration threshold is 1500ms. When the first duration and the second duration are both within 1500ms, it is determined that the duration condition is met.

When the continuous condition is met, it is determined whether the gear shift process condition is met.

Finally, it is explained whether the vehicle parameters meet the shifting process conditions.

The above state condition is determined by the gear shifting process. When the gear shifting process is less than the third threshold value, or when the gear shifting process is greater than the fourth threshold value, it is determined that the state condition is satisfied.

The third threshold and the fourth threshold can be set according to actual conditions. Optionally, the third threshold is 10% and the fourth threshold is 90%. During the gear shifting process, if the gear shifting progress is less than 10%, or the gear shifting progress is greater than 90%, it is determined that the state condition is met.

When the driving parameters of the vehicle meet the above-mentioned set conditions, it is determined that the vehicle enters the tipout condition, enters the torque increase control mode, and adopts the torque increase request strategy to control the output torque of the engine.

S102: In the torque increase control mode, a target torque value of the engine is determined based on a current torque value of the engine and a preset slope, wherein the preset slope is greater than an actual torque change rate of the engine.

The torque increase control mode can be understood as a mode for controlling the output torque of the engine so that the reduction process of the actual output torque of the engine can be slowed down. The current torque value of the engine can be understood as the output torque value of the engine that can be collected at the current moment. The preset slope can be set according to the actual situation. Optionally, the preset slope is 0.5.

It should be noted that the torque increase control does not control the engine's output torque to increase or increase, but controls the engine's output torque change rate to slow down. In other words, the purpose of the torque increase control in the present disclosure is to increase the time it takes for the engine's output torque to drop to 0, so as to improve the feeling of reverse drag under tipout conditions.

In one possible implementation, when the vehicle enters a fast throttle release condition, the actual torque value of the engine is obtained as the first torque value; the basic torque value corresponding to the current gear is obtained as the second torque value; and the minimum value between the first torque value and the second torque value is used as the current torque value of the engine.

The actual torque value of the engine can be understood as the actual torque value outputted by the engine output terminal when the vehicle enters a fast throttle release condition.

The current gear can be understood as the gear that the gearbox is currently in. The gearbox is usually set with multiple gears, each gear corresponds to a basic torque, and the basic torque can be the minimum torque value corresponding to each gear. When the vehicle enters the fast throttle release condition, the gear that the gearbox is in is obtained as the current gear. Based on the current gear and the basic torques corresponding to each gear, the basic torque corresponding to the current gear is queried, and the basic torque corresponding to the current gear is used as the second torque value.

The first torque value and the second torque value are compared. If the first torque value is smaller than the second torque value, that is, the torque value actually output by the engine is smaller than the basic torque corresponding to the current gear, the first torque value is directly used as the current torque value of the engine, and the target torque value is directly calculated based on the first torque value (the torque value actually output by the engine), and the target torque value is sent to the engine.

If the first torque value is greater than the second torque value, that is, the actual torque value output by the engine is greater than the basic torque corresponding to the current gear, the second torque value (the basic torque corresponding to the current gear) is directly used as the current torque value of the engine. At this time, the torque control phase is not entered, but the first torque value is waited to drop to the second torque value, that is, the actual output torque value of the engine reaches the basic torque corresponding to the current gear, and then the target torque value is calculated based on the second torque value and sent to the engine.

The actual torque change rate of the engine can be understood as the change rate of the actual output torque of the engine when the torque increase control scheme provided in the present disclosure is not adopted. Among them, the preset slope can be set according to actual conditions, for example: the preset slope can be any value between 0.5-2, and is not specifically limited in the embodiments of the present disclosure.

In the torque boost control mode, the target torque value is periodically calculated based on the current torque value of the engine, the preset slope and the control duration. In other words, the target torque value is calculated based on the current torque value of the engine, the preset slope and the control duration for each preset duration.

The target torque value is calculated based on the current torque value of the engine, the preset slope and the control time. The control time refers to the time from when the vehicle enters the fast throttle release condition to the current sampling moment. The control time can also refer to the sum of the control time at the previous moment and the sampling period.

Specifically, the product of the preset slope and the control duration is calculated, and the product is added to the current torque value of the engine to obtain the target torque value.

In a possible implementation, different gears correspond to different preset slopes. Based on the current gear of the gearbox, a query is made in the correspondence between the gear and the preset slope to determine the preset slope corresponding to the current gear. The target torque value is calculated based on the current torque value of the engine, the preset slope corresponding to the current gear, and the control duration.

S103: Send a target torque value to the engine, where the target torque value is used to control the output torque of the engine.

After the target torque value is calculated according to the method in S102, the target torque value is sent to the engine so that the engine responds to the control of the torque by the transmission controller. The target torque value is used to control the output torque of the engine to offset the output torque of the engine itself, control the rate of decrease of the engine torque, prolong the time for the engine output to reach 0 or negative torque, and improve the reverse drag feeling under the tipout condition.

In a possible implementation, the engine torque control method further includes: in the torque increase control mode, if it is detected that the actual torque of the engine is greater than the target torque value, then exiting the torque increase control mode.

The target torque refers to the torque that the engine should output under the tipout condition. Exiting the torque increase control mode can be understood as no longer using the engine control method provided in the embodiment of the present disclosure, but using the existing engine control method in the transmission controller to control the output torque of the engine.

In the process of periodically sending the target torque value to the engine to control the output torque of the engine, the actual output torque of the engine is detected in real time. If the actual output torque reaches the torque that the engine should output under the tipout condition, it indicates that the control purpose of the engine at the current stage has been achieved and the torque increase control mode can be exited. This provides the exit condition of the torque increase control mode and improves the accuracy of engine torque control.

In one possible implementation, the engine torque control method also includes: in the torque increase control mode, if it is detected that the vehicle enters a powered operating condition, the target torque value is quickly increased according to a fourth preset, and when the target torque value is less than the actual output torque of the engine, the torque increase control mode is exited.

Among them, if it is detected that the vehicle enters a powered operating condition, it may include: detecting that the throttle opening is greater than 3% or detecting that the powered identification bit is 1.

This application provides a control solution for when the vehicle enters a powered operating condition, expanding the application scenarios of engine torque control.

The embodiment of the present disclosure provides an engine torque control method, the method comprising: when the vehicle enters a fast throttle release condition, entering a torque increase control mode; in the torque increase control mode, determining a target torque value of the engine based on the current torque value of the engine and a preset slope, the preset slope being greater than the actual torque change rate of the engine; sending a target torque value to the engine, the target torque value being used to control the output torque of the engine. In the present disclosure, a gearbox controller identifies the working condition and sends a target torque value to the engine, so that the engine responds to the target torque value, controls the rate of decrease of the engine torque, and improves the reverse drag feeling under the tipout condition.

On the basis of the above embodiments, the embodiment of the present disclosure further optimizes the engine torque control method. As shown in FIG2 , the optimized engine torque control method mainly includes the following steps:

S201. When the vehicle enters a fast accelerator release condition, enter a torque increase control mode.

The execution process of S201 provided in the embodiment of the present application is the same as that of S101 provided in the above embodiment. For details, please refer to the description in the above embodiment, and the embodiment of the present application will not be repeated.

S202: In a first control phase, a first target torque value of the engine is calculated based on a current torque value of the engine and a first slope.

The method for determining the current torque value of the engine can be referred to the description in the above embodiment, and the embodiment of the present application will not be described in detail.

Different gears correspond to different first slopes. Based on the current gear of the gearbox, the first slope corresponding to the current gear is determined by querying the corresponding relationship between the gear and the first slope. The first target torque value is calculated based on the current torque value of the engine, the first slope corresponding to the current gear, and the control duration.

In this embodiment, the first target torque value is periodically calculated and sent to the engine periodically, so that the engine responds to the first target torque value and controls the output torque of the engine.

In one possible implementation, a second duration threshold corresponding to the first control stage is obtained, a first target torque value is calculated based on the current torque value of the engine, the first slope corresponding to the current gear, and the second duration threshold, and the first target torque value is sent to the engine so that the engine responds to the first target torque value and controls the output torque of the engine.

S203: When the duration of the first control phase reaches a second duration threshold, enter the second control phase.

The second duration threshold is a threshold that characterizes the working duration of the first control stage. Different gears may correspond to different second duration thresholds, and the higher the gear, the longer the second duration threshold. In other words, the second duration threshold is in direct proportion to the gear.

Based on the current gear position of the transmission, a query is made in the correspondence relationship between the gear position and the second duration threshold to determine the second duration threshold corresponding to the current gear position.

If the duration of the first control phase reaches a second duration threshold corresponding to the current gear, the second control phase is entered.

S204: In the second control stage, a second target torque value of the engine is calculated based on the first target torque value corresponding to the end time of the first control stage and the second slope.

The control method of the second control stage is the same as that of the first control stage, except that the second slope used in the second control stage is greater than the first slope used in the first control stage.

Different gears correspond to different second slopes. Based on the current gear of the gearbox, the corresponding relationship between the gear and the second slope is queried to determine the second slope corresponding to the current gear. The second target torque value is calculated based on the current torque value of the engine, the second slope corresponding to the current gear, and the control duration.

In this embodiment, the second target torque value is periodically calculated and sent to the engine periodically, so that the engine responds to the second target torque value and controls the output torque of the engine.

In one possible implementation, a third duration threshold corresponding to the second control stage is obtained, a second target torque value is calculated based on the current torque value of the engine, the second slope corresponding to the current gear, and the third duration threshold, and the second target torque value is sent to the engine so that the engine responds to the second target torque value and controls the output torque of the engine.

In an embodiment of the present application, the actual torque of the engine is detected in real time, and it is determined whether the actual torque of the engine is greater than the second target torque value. If the actual torque of the engine is greater than the second target torque value, the torque increase control mode is exited.

S205: When the duration of the second control phase reaches the third duration threshold and the output torque value of the engine does not reach the target torque value, enter the third control phase.

The third duration threshold is a threshold that characterizes the working duration of the second control stage. Different gears may correspond to different third duration thresholds, and the higher the gear, the longer the third duration threshold. In other words, the third duration threshold is in direct proportion to the gear.

Based on the current gear position of the transmission, a query is made in the correspondence relationship between the gear position and the third time threshold to determine the third time threshold corresponding to the current gear position.

In the embodiment of the present application, the actual torque of the engine is detected in real time, and the duration of the second control stage is recorded; it is determined whether the actual torque of the engine is greater than the second target torque value, and if the actual torque of the engine is greater than the second target torque value, the torque increase control mode is exited. If the duration of the second control stage reaches the third duration threshold, and the actual torque of the engine is still less than the second target torque value, the third control stage is entered.

S206. In the third control stage, calculate a third target torque value of the engine based on the end time of the second control stage and the third slope.

The control method of the third control stage is the same as that of the second control stage, except that the third slope used in the third control stage is greater than the second slope used in the second control stage.

Different gears correspond to different third slopes. Based on the current gear of the gearbox, the third slope corresponding to the current gear is determined by querying the corresponding relationship between the gear and the third slope. The third target torque value is calculated based on the current torque value of the engine, the third slope corresponding to the current gear, and the control duration.

In this embodiment, the third target torque value is periodically calculated and sent to the engine periodically, so that the engine responds to the third target torque value and controls the output torque of the engine.

In the third control stage, the actual torque of the engine is detected in real time, and when the actual torque is greater than the second target torque value, the torque increase control mode is exited.

S207: If it is detected that the actual torque of the engine is greater than the target torque, then exit the torque increase control mode.

If it is detected that the vehicle enters a powered condition in the torque boost control mode, the fourth target torque value is calculated according to the fourth slope until the fourth target torque value is less than the actual torque of the engine, and then the torque boost control module is exited.

FIG3 is a schematic diagram of a torque increase request strategy provided by an embodiment of the present disclosure; as shown in FIG3 , when the throttle opening is rapidly reduced to close to 0 (the throttle opening is less than 2%), the torque increase control mode is entered, and at this time, the torque increase control mark position is set to 1, and the torque increase control mark position 1 indicates that the torque increase control mode is in place at this time. The TCU will calculate the target torque of each stage based on the preset slope, and the calculated target torque is shown in FIG3 . Under the control of the target torque, the actual torque of the engine will not drop to 0 quickly, the decline process slows down, and after a certain period of time, the actual torque of the engine begins to rise slowly. After the torque increase control mark position is set to 0, the torque increase control mode is exited. The TCU no longer calculates the target torque of each stage based on the preset slope.

As can be seen from FIG. 3 , in the present disclosure, the gearbox controller identifies the working condition and sends a target torque value to the engine, so that the engine responds to the target torque value and controls the rate of decrease of the engine torque to improve the reverse drag feeling under the tipout working condition.

FIG4 is a schematic diagram of the structure of an engine torque control device in an embodiment of the present disclosure. As shown in FIG4 , the engine torque control device 40 provided in the embodiment of the present disclosure mainly includes:

Among them, the mode entry module 41 is used to enter the torque increase control mode when the vehicle enters the fast throttle release condition; the target value calculation module 42 is used to determine the target torque value of the engine based on the current torque value of the engine and the preset slope in the torque increase control mode, and the preset slope is greater than the actual torque change rate of the engine; the target value sending module 43 is used to send the target torque value to the engine, and the target torque value is used to control the output torque of the engine.

The embodiment of the present disclosure provides an engine torque control device, which is used in the following process: when the vehicle enters a fast throttle release condition, it enters a torque increase control mode; in the torque increase control mode, the target torque value of the engine is determined based on the current torque value of the engine and a preset slope, and the preset slope is greater than the actual torque change rate of the engine; the target torque value is sent to the engine, and the target torque value is used to control the output torque of the engine. In the present disclosure, the gearbox controller identifies the working condition and sends the target torque value to the engine, so that the engine responds to the target torque value and controls the rate of decrease of the engine torque, so as to improve the reverse drag feeling under the tipout condition.

In a possible implementation, the system further includes: a working condition determination module, which is used to periodically collect the driving parameters of the vehicle during the driving process of the vehicle; and determine that the vehicle enters a fast throttle release working condition when the driving parameters of the vehicle meet set conditions; the set conditions include: triggering a first set condition, a duration within a first duration threshold, and a shifting process condition;

The first set condition is triggered: the throttle deceleration condition is met, the vehicle is in an unpowered state, the current torque of the engine is less than the first threshold, and the current torque of the engine is greater than the first threshold.

The duration includes: a first duration during which the current torque of the engine is less than a first threshold value, and a second duration during which the throttle opening is less than the first opening threshold value;

The gear shifting progress condition includes: the gear shifting progress is less than a third threshold, or the gear shifting progress is greater than a fourth threshold.

In a possible implementation, it also includes: a current torque value determination module, which is used to obtain the actual torque value of the engine as the first torque value when the vehicle enters a fast throttle release condition; obtain the basic torque value corresponding to the current gear as the second torque value; and use the minimum value of the first torque value and the second torque value as the current torque value of the engine.

In one possible implementation, the preset slope includes a first slope and a second slope, wherein the second slope is greater than the first slope; the target value calculation module 42 is specifically used to calculate the first target torque value of the engine based on the current torque value of the engine and the first slope in the first control stage; enter the second control stage when the duration of the first control stage reaches a second duration threshold; in the second control stage, calculate the second target torque value of the engine based on the first target torque value corresponding to the end time of the first control stage and the second slope.

In one possible implementation, the preset slope includes a third slope, wherein the third slope is greater than the second slope; the target value calculation module 42 is specifically used to enter the third control stage when the duration of the second control stage reaches a third duration threshold and the output torque value of the engine does not reach the target torque value; within the third control stage, the third target torque value of the engine is calculated based on the end time of the second control stage and the third slope.

In a possible implementation, the system further includes: a mode exit module, configured to exit the torque increase control mode when it is detected that the actual torque of the engine is greater than the target torque in the torque increase control mode.

The engine torque control device provided in the embodiment of the present disclosure can execute the steps executed in the engine torque control method provided in the method embodiment of the present disclosure, and the execution steps and beneficial effects are no longer repeated here.

FIG5 is a schematic diagram of the structure of an electronic device in an embodiment of the present disclosure, and the electronic device may be an engine torque control device. Referring to FIG5 in detail below, a schematic diagram of the structure of an electronic device 500 suitable for implementing an embodiment of the present disclosure is shown. The electronic device 500 in an embodiment of the present disclosure may include, but is not limited to, a supercomputer.

As shown in FIG5 , the electronic device 500 may include a processing device (e.g., a central processing unit, a graphics processing unit, etc.) 501, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 502 or a program loaded from a storage device 508 to a random access memory (RAM) 503 to implement the engine torque control method of the embodiment described in the present disclosure. In the RAM 503, various programs and data required for the operation of the electronic device 500 are also stored. The processing device 501, the ROM 502, and the RAM 503 are connected to each other via a bus 504. An input/output (I/O) interface 505 is also connected to the bus 504.

Typically, the following devices may be connected to the I/O interface 505: input devices 506 including, for example, a touch screen, a touchpad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, etc.; output devices 507 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices 508 including, for example, a magnetic tape, a hard disk, etc.; and communication devices 509. The communication device 509 may allow the electronic device 500 to communicate with other devices wirelessly or by wire to exchange data. Although FIG. 5 shows an electronic device 500 with various devices, it should be understood that it is not required to implement or have all the devices shown. More or fewer devices may be implemented or have alternatively.

In particular, according to an embodiment of the present disclosure, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present disclosure includes a computer program product, which includes a computer program carried on a non-transitory computer-readable medium, and the computer program contains a program code for executing the method shown in the flowchart, thereby implementing the engine torque control method as described above. In such an embodiment, the computer program can be downloaded and installed from the network through the communication device 509, or installed from the storage device 508, or installed from the ROM 502. When the computer program is executed by the processing device 501, the above-mentioned functions defined in the method of the embodiment of the present disclosure are executed.

It should be noted that the computer-readable medium mentioned above in the present disclosure may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, 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 disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, device or device. In the present disclosure, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable program code. This propagated data signal may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer readable signal media may also be any computer readable medium other than computer readable storage media, which may send, propagate or transmit a program for use by or in conjunction with an instruction execution system, apparatus or device. The program code contained on the computer readable medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (radio frequency), etc., or any suitable combination of the above.

In some embodiments, the client and the server may communicate using any currently known or future developed network protocol such as HTTP (HyperText Transfer Protocol), and may be interconnected with any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network ("LAN"), a wide area network ("WAN"), an internet (e.g., the Internet), and a peer-to-peer network (e.g., an ad hoc peer-to-peer network), as well as any currently known or future developed network.

The computer-readable medium may be included in the electronic device, or may exist independently without being incorporated into the electronic device.

In a possible implementation of the present disclosure, the computer-readable medium carries one or more programs. When the one or more programs are executed by the electronic device, the electronic device can implement the engine torque control method described in any one of the above embodiments.

In a possible implementation manner of the present disclosure, when the above one or more programs are executed by the electronic device, the electronic device may also execute other steps described in the above embodiments.

Computer program code for performing the operations of the present disclosure may be written in one or more programming languages or a combination thereof, including, but not limited to, object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present disclosure. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some implementations as replacements, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and/or flow chart, and the combination of the square boxes in the block diagram and/or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

The units involved in the embodiments described in the present disclosure may be implemented by software or hardware, wherein the name of a unit does not, in some cases, constitute a limitation on the unit itself.

The functions described above herein may be performed at least in part by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), and the like.

In the context of the present disclosure, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or equipment. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any suitable combination of the foregoing. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, 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 disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

The above description is only a preferred embodiment of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of disclosure involved in the present disclosure is not limited to the technical solutions formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present disclosure (but not limited to) to form a technical solution.

In addition, although each operation is described in a specific order, this should not be required to perform these operations in the specific order shown or in a sequential order. Under certain circumstances, multitasking and parallel processing may be advantageous. Similarly, although some specific implementation details are included in the above discussion, these should not be interpreted as limiting the scope of the present disclosure. Some features described in the context of a separate embodiment can also be implemented in a single embodiment in combination. On the contrary, the various features described in the context of a single embodiment can also be implemented in multiple embodiments individually or in any suitable sub-combination mode.

Although the subject matter has been described in language specific to structural features and/or methodological logical actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. On the contrary, the specific features and actions described above are merely example forms of implementing the claims.

Claims (10)

1. An engine torque control method, characterized in that the method is applied to a transmission controller, comprising: When the vehicle enters the condition of rapid throttle release, it enters the torque increase control mode; In the torque increase control mode, the target torque value of the engine is determined based on the current torque value of the engine and a preset slope, wherein the preset slope is greater than the actual torque change rate of the engine; The target torque value is sent to the engine, and the target torque value is used to control the output torque of the engine. 2. The method according to claim 1, further comprising: During the driving process of the vehicle, periodically collecting the driving parameters of the vehicle; Under the condition that the driving parameters of the vehicle meet the set conditions, it is determined that the vehicle enters a fast throttle release condition. 3. The method according to claim 2, characterized in that the set conditions include: triggering a first set condition, a duration within a first duration threshold, and a shift process condition; Triggering the first set condition: the throttle deceleration condition is met, the vehicle is in a powerless state, the current torque of the engine is less than the first threshold, and the current torque of the engine is greater than the first threshold; The duration includes: a first duration during which the current torque of the engine is less than a first threshold value, and a second duration during which the throttle opening is less than the first opening threshold value; The gear shifting progress condition includes: the gear shifting progress is less than a third threshold, or the gear shifting progress is greater than a fourth threshold. 4. The method according to claim 1, further comprising: When the vehicle enters a fast throttle release condition, obtaining an actual torque value of the engine as a first torque value; Obtaining a basic torque value corresponding to the current gear as a second torque value; The minimum value between the first torque value and the second torque value is used as the current torque value of the engine. 5. The method according to claim 1, characterized in that the preset slope comprises a first slope and a second slope, wherein the second slope is greater than the first slope; Determining a target torque value of the engine based on a current torque value of the engine and a preset change rate includes: In a first control stage, a first target torque value of the engine is calculated based on a current torque value of the engine and a first slope; When the duration of the first control phase reaches a second duration threshold, entering the second control phase; In the second control stage, a second target torque value of the engine is calculated based on the first target torque value corresponding to the end time of the first control stage and the second slope. 6. The method according to claim 5, characterized in that the preset slope comprises a third slope, wherein the third slope is greater than the second slope; Determining a target torque value of the engine based on a current torque value of the engine and a preset change rate includes: When the duration of the second control stage reaches a third duration threshold and the output torque value of the engine does not reach the target torque value, entering a third control stage; In a third control phase, a third target torque value of the engine is calculated based on the end time of the second control phase and a third slope. 7. The method according to any one of claims 1 to 6, characterized in that the method further comprises: In the torque-up control mode, if it is detected that the actual torque of the engine is greater than the target torque, the torque-up control mode is exited. 8. An engine torque control device, characterized in that the device is configured in a transmission controller, comprising: The mode entry module is used to enter the torque increase control mode when the vehicle enters the fast accelerator release condition; a target value calculation module, configured to determine a target torque value of the engine based on a current torque value of the engine and a preset slope in a torque increase control mode, wherein the preset slope is greater than an actual torque change rate of the engine; The target value sending module is used to send the target torque value to the engine, and the target torque value is used to control the output torque of the engine. 9. A transmission controller, characterized in that the transmission controller comprises: one or more processors; A storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the engine torque control method as described in any one of claims 1-7. 10. A computer-readable storage medium having a computer program stored thereon, wherein when the program is executed by a processor, the engine torque control method according to any one of claims 1 to 7 is implemented.