CN116238513A

CN116238513A - Control method and control device for vehicle, processor and electronic equipment

Info

Publication number: CN116238513A
Application number: CN202310078086.9A
Authority: CN
Inventors: 李淑珍; 孙晓鹏; 刘中秀
Original assignee: Weichai Power Co Ltd; Weifang Weichai Power Technology Co Ltd
Current assignee: Weichai Power Co Ltd; Weifang Weichai Power Technology Co Ltd
Priority date: 2023-01-31
Filing date: 2023-01-31
Publication date: 2023-06-09

Abstract

The application provides a control method, a control device, a processor and electronic equipment of a vehicle, wherein the method comprises the following steps: under the condition that a preset condition is met, determining a first required speed ratio of a gearbox of the vehicle according to a first rotating speed and a second rotating speed, wherein the first rotating speed is the maximum rotating speed of an engine of the vehicle, the second rotating speed is the actual rotating speed of the gearbox, the preset condition comprises that a third rotating speed is larger than the maximum idle speed of the engine, and the third rotating speed is the actual rotating speed of the engine; determining a second demand speed ratio of the gearbox according to the actual speed of the vehicle and the third rotating speed; determining a final demand speed ratio as a maximum of the first demand speed ratio and the second demand speed ratio; and adjusting the required speed ratio of the gearbox according to the final required speed ratio so as to reduce the third rotating speed. The problem of the solution cost of reverse backward dragging of engine among the prior art higher is solved to this application.

Description

Control method and control device for vehicle, processor and electronic equipment

Technical Field

The present disclosure relates to the field of vehicle control, and in particular, to a vehicle control method, a control device, a processor, and an electronic apparatus.

Background

When the whole vehicle runs under working conditions such as reversing or downhill, the engine brake can generate serious reverse dragging (also called reverse dragging), namely the actual rotation speed of the engine can be instantly increased to exceed the highest idle speed of the engine by a certain value, and at the moment, the engine is damaged to a certain extent due to the large rotation speed of the engine, and power loss can be caused, so that poor driving experience is brought to a driver.

The existing solution to the problem is to modify the gear structure of the power system, namely, the modified anti-reverse-dragging gear structure comprises an idler gear, one side of the idler gear is meshed with a power turbine output gear, the other side of the idler gear is meshed with a crankshaft gear, an overrunning clutch is arranged in a shaft hole of the idler gear and is arranged on an engine bracket, clutch can be realized between the power turbine output gear and the crankshaft gear, when the rotating speed of the idler gear is lower than that of the crankshaft gear, the overrunning clutch realizes analysis of a transmission path, and when the rotating speed of the idler gear is higher than that of the crankshaft gear, the overrunning clutch realizes forward transmission of torque to the crankshaft gear, so that reverse-dragging of the engine is effectively avoided.

The method solves the problem of reverse dragging of the engine by modifying the reverse dragging-preventing gear structure, and is a change made from a hardware structure, high in cost and narrow in application range.

Disclosure of Invention

The main object of the present application is to provide a control method, a control device, a processor and an electronic device for a vehicle, so as to at least solve the problem of high cost of the solution of reverse towing of an engine in the prior art.

In order to achieve the above object, according to one aspect of the present application, there is provided a control method of a vehicle, including: determining a first required speed ratio of a gearbox of a vehicle according to a first rotating speed and a second rotating speed under the condition that a preset condition is met, wherein the first rotating speed is the maximum rotating speed of an engine of the vehicle, the second rotating speed is the actual rotating speed of the gearbox, the preset condition comprises that a third rotating speed is larger than the maximum idle speed of the engine, and the third rotating speed is the actual rotating speed of the engine; determining a second required speed ratio of the gearbox according to the actual speed of the vehicle and the third rotating speed; determining a final demand speed ratio as a maximum of the first demand speed ratio and the second demand speed ratio; and adjusting the required speed ratio of the gearbox according to the final required speed ratio so as to reduce the third rotating speed.

Optionally, determining a first required speed ratio of the transmission of the vehicle according to the first rotational speed and the second rotational speed includes: and determining that the first demand speed ratio is the ratio of the second rotating speed to the first rotating speed according to the first rotating speed and the second rotating speed.

Optionally, the corresponding relationship between the vehicle speed and the acceleration of the vehicle is a first corresponding relationship, the corresponding relationship between the acceleration of the vehicle and the speed ratio change rate is a second corresponding relationship, the corresponding relationship between the actual rotation speed of the engine and the compensation value of the speed ratio change rate is a third corresponding relationship, and the determining the second required speed ratio according to the actual vehicle speed and the third rotation speed of the vehicle includes: determining the acceleration corresponding to the vehicle speed identical to the actual vehicle speed as a target acceleration according to the actual vehicle speed and the first corresponding relation; according to the target acceleration and the second corresponding relation, determining the speed ratio change rate corresponding to the acceleration identical to the target acceleration as a target speed ratio change rate; determining the compensation value corresponding to the actual rotation speed of the engine, which is the same as the third rotation speed, as a target compensation value according to the third rotation speed and the third corresponding relation; and calculating the sum of the target speed ratio change rate and the target compensation value to obtain a demand rate change rate, and obtaining the second demand speed ratio according to the demand rate change rate.

Optionally, adjusting the required speed ratio of the gearbox to reduce the third rotational speed according to the final required speed ratio includes: determining whether the final demand speed ratio is equal to the second demand speed ratio; and in the case that the final demand speed ratio is not equal to the second demand speed ratio, adjusting the demand speed ratio of the transmission to the final demand speed ratio to reduce the third rotational speed.

Optionally, in the case where the final demand speed ratio is not equal to the second demand speed ratio, adjusting the demand speed ratio of the transmission to the final demand speed ratio includes: setting a speed ratio adjustment status bit to a second value when the final required speed ratio is equal to the second required speed ratio, the speed ratio adjustment status bit being an information bit that characterizes whether to adjust a required speed ratio of the transmission, and determining to adjust the required speed ratio of the transmission when the speed ratio adjustment status bit is the second value; and under the condition that the speed ratio adjustment state bit is the second numerical value, adjusting the required speed ratio of the gearbox to the final required speed ratio.

Optionally, in the case where the final demand speed ratio is equal to the second demand speed ratio, the method further includes: determining a desired speed ratio of the transmission as the second desired speed ratio; and setting a speed ratio adjustment state bit to a first numerical value, wherein the speed ratio adjustment state bit is an information bit for representing whether to adjust the required speed ratio of the gearbox, and determining not to adjust the required speed ratio of the gearbox under the condition that the speed ratio adjustment state bit is the first numerical value.

Optionally, the predetermined condition further includes that the second rotational speed is greater than a preset minimum rotational speed of the gearbox.

According to another aspect of the present application, there is provided a control device of a vehicle, including: a first determining unit, configured to determine a first required speed ratio of a transmission of a vehicle according to a first rotation speed and a second rotation speed when a predetermined condition is satisfied, where the first rotation speed is a maximum rotation speed of an engine of the vehicle, the second rotation speed is an actual rotation speed of the transmission, the predetermined condition includes that a third rotation speed is greater than a maximum idle speed of the engine, and the third rotation speed is the actual rotation speed of the engine; a second determining unit configured to determine a second required speed ratio of the transmission according to an actual vehicle speed of the vehicle and the third rotational speed; a third determining unit configured to determine a final demand speed ratio as a maximum value of the first demand speed ratio and the second demand speed ratio; and the adjusting unit is used for adjusting the required speed ratio of the gearbox according to the final required speed ratio so as to reduce the third rotating speed.

According to yet another aspect of the present application, there is provided a processor for running a program, wherein the program when run performs any one of the methods.

According to still another aspect of the present application, there is provided an electronic apparatus including: one or more processors, memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs comprising instructions for performing any of the methods.

By adopting the technical scheme, firstly, under the condition that the preset condition that the actual rotating speed of the vehicle engine is larger than the maximum idle speed of the engine is met, determining a first required speed ratio of the gearbox according to a first rotating speed representing the maximum rotating speed of the engine and a second rotating speed representing the actual rotating speed of the vehicle gearbox; then, determining a second required speed ratio of the gearbox according to the actual speed of the vehicle and the actual rotation speed of the engine; determining that the greater of the first demand speed ratio and the second demand speed ratio is the final demand speed ratio of the vehicle; and finally, according to the final required speed ratio, the required speed ratio of the gearbox is adjusted to reduce the actual rotation speed of the vehicle engine and avoid reverse dragging of the engine. According to the method and the device, under the condition that the actual rotation speed of the engine is larger than the preset maximum idle speed, the phenomenon that the engine is reversed is described, at the moment, the first demand speed ratio is determined according to the first rotation speed and the second rotation speed, the second demand speed ratio is determined according to the actual speed of the vehicle and the actual rotation speed of the engine, then the demand speed ratio of the gearbox is adjusted according to the larger value of the two demand speed ratios, the rotation speed of the engine is lowered, the reverse dragging of the engine is realized from the software level, the problem of the reverse dragging can be solved without improving a vehicle power system in terms of hardware, the improvement cost of the vehicle is guaranteed to be lower, and meanwhile, the damage caused by the reverse dragging to the engine and the poor driving experience caused by the reverse dragging are avoided.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

fig. 1 shows a hardware block diagram of a mobile terminal that performs a control method of a vehicle according to an embodiment of the present application;

FIG. 2 illustrates a flow chart of a method of controlling a vehicle according to an embodiment of the present application;

FIG. 3 illustrates a control flow diagram of a vehicle provided in accordance with an embodiment of the present application;

fig. 4 shows a block diagram of a control device of a vehicle according to an embodiment of the present application.

Wherein the figures include the following reference numerals:

102. a processor; 104. a memory; 106. a transmission device; 108. and an input/output device.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and in the drawings are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

As described in the background art, the solution of reverse towing of the engine in the prior art is relatively high in cost, and in order to solve the above problem, the embodiments of the present application provide a control method, a control device, a processor and an electronic device for a vehicle.

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.

The method embodiments provided in the embodiments of the present application may be performed in a mobile terminal, a computer terminal or similar computing device. Taking the mobile terminal as an example, fig. 1 is a block diagram of a hardware structure of the mobile terminal according to a vehicle control method according to an embodiment of the present invention. As shown in fig. 1, a mobile terminal may include one or more (only one is shown in fig. 1) processors 102 (the processor 102 may include, but is not limited to, a microprocessor MCU or a processing device such as a programmable logic device FPGA) and a memory 104 for storing data, wherein the mobile terminal may also include a transmission device 106 for communication functions and an input-output device 108. It will be appreciated by those skilled in the art that the structure shown in fig. 1 is merely illustrative and not limiting on the structure of the mobile terminal. For example, the mobile terminal may also include more or fewer components than shown in fig. 1, or have a different configuration than shown in fig. 1.

The memory 104 may be used to store computer programs, such as software programs of application software and modules, such as computer programs corresponding to the method for displaying device information in the embodiment of the present invention, and the processor 102 executes the computer programs stored in the memory 104 to perform various functional applications and data processing, i.e., implement the method. Memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory remotely located relative to the processor 102, which may be connected to the mobile terminal via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof. The transmission device 106 is used to receive or transmit data via a network. Specific examples of the network may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, simply referred to as NIC) that can connect to other network devices through a base station to communicate with the internet. In one example, the transmission device 106 may be a Radio Frequency (RF) module, which is configured to communicate with the internet wirelessly.

In the present embodiment, a control method of a vehicle operating on a mobile terminal, a computer terminal, or a similar computing device is provided, it is to be noted that the steps shown in the flowcharts of the drawings may be executed in a computer system such as a set of computer executable instructions, and that although a logical order is shown in the flowcharts, in some cases, the steps shown or described may be executed in an order different from that shown or described herein.

Fig. 2 is a flowchart of a control method of a vehicle according to an embodiment of the present application. As shown in fig. 2, the method comprises the steps of:

step S201, under the condition that a preset condition is met, a first required speed ratio of a gearbox of a vehicle is determined according to a first rotating speed and a second rotating speed, wherein the first rotating speed is the maximum rotating speed of an engine of the vehicle, the second rotating speed is the actual rotating speed of the gearbox, the preset condition comprises that a third rotating speed is larger than the maximum idle speed of the engine, and the third rotating speed is the actual rotating speed of the engine;

specifically, the maximum idle speed is the maximum idle speed of the engine, the maximum rotating speed is the maximum rotating speed of the engine, the corresponding maximum idle speed and the corresponding maximum rotating speed are marked in working parameters of different types of engines, and a person skilled in the art can determine the two parameters according to the working parameters of the engine. And under the condition that the actual rotating speed of the engine is larger than the maximum idle speed of the engine, the engine is proved to have serious reverse dragging phenomenon. The first desired speed ratio is a desired speed ratio of the transmission, i.e., a desired gear ratio, determined from the first rotational speed and the second rotational speed.

The gearbox may be of any suitable type, and in one particular embodiment is a hydromechanical continuously variable transmission.

In an embodiment of the present application, the predetermined condition further includes that the second rotation speed is greater than a preset minimum rotation speed of the gearbox. The condition that the second rotating speed is larger than the minimum rotating speed of the gearbox is met, and the vehicle has enough kinetic energy in the control process is ensured.

In particular, the minimum rotational speed is the rotational speed minimum value of the gearbox, and the corresponding minimum rotational speed is marked in the working parameters of different types of gearboxes, so that a person skilled in the art can determine the parameters according to the working parameters of the gearboxes.

According to an exemplary embodiment of the present application, determining a first desired speed ratio of a transmission of a vehicle from a first rotational speed and a second rotational speed includes: and determining that the first demand speed ratio is the ratio of the second rotating speed to the first rotating speed according to the first rotating speed and the second rotating speed. In this embodiment, the first demand speed ratio is determined to be the ratio of the maximum rotational speed of the gearbox to the actual rotational speed of the engine, so that a powerful data support is provided for the subsequent process of determining the final demand speed ratio according to the first demand speed ratio and the second demand speed ratio and controlling the gearbox by adopting the final demand, and further, the subsequent reduction of the rotational speed of the engine is ensured to be effectively realized, thereby further solving the problem of the reverse towing of the engine. The formula of the required speed ratio is as follows: the required speed ratio=the output speed of the gearbox/the actual speed of the engine, when the output speed of the gearbox is unchanged, the larger the required speed ratio is, the smaller the actual speed of the engine is, and the actual speed of the engine is larger than the maximum speed of the engine under the condition of reverse dragging, so that the first required speed ratio obtained according to the maximum speed is larger, the required speed ratio of the gearbox is adjusted according to the first required speed ratio, and the engine speed can be lowered, so that the problem of reverse dragging of the engine is further solved.

Step S202, determining a second required speed ratio of the gearbox according to the actual speed of the vehicle and the third rotating speed;

specifically, the second demand speed ratio is a demand speed ratio of the transmission that is determined according to an actual vehicle speed and an actual rotational speed of the engine. The second demand speed ratio is a current demand speed ratio of the transmission.

In order to further ensure that the second required speed ratio of the gearbox is simply and quickly determined, further, the corresponding relation between the vehicle speed and the acceleration of the vehicle is a first corresponding relation, the corresponding relation between the acceleration of the vehicle and the speed ratio change rate is a second corresponding relation, the corresponding relation between the actual rotation speed of the engine and the compensation value of the speed ratio change rate is a third corresponding relation, and the specific implementation manner of step S202 may include:

step S2021: determining the acceleration corresponding to the vehicle speed identical to the actual vehicle speed as a target acceleration according to the actual vehicle speed and the first corresponding relation;

step S2022: according to the target acceleration and the second corresponding relation, determining the speed ratio change rate corresponding to the acceleration identical to the target acceleration as a target speed ratio change rate;

Step S2023: determining the compensation value corresponding to the actual rotation speed of the engine, which is the same as the third rotation speed, as a target compensation value according to the third rotation speed and the third corresponding relation;

step S2024: and calculating the sum of the target speed ratio change rate and the target compensation value to obtain a demand rate change rate, and obtaining the second demand speed ratio according to the demand rate change rate.

Through the process, the second demand speed ratio can be obtained simply and rapidly according to the vehicle speed and the actual rotation speed of the engine, a final demand speed ratio is determined for the follow-up process according to the second demand speed ratio and the first demand speed ratio, and powerful data support is provided for the process of controlling the gearbox by adopting the final demand, so that the problem of reverse dragging of the engine is further solved.

The target compensation value may be positive or negative. The vehicle speed may be an instantaneous moving speed of the vehicle, or may be an average moving speed of the vehicle within a period of time, so as to ensure instantaneity of the second demand speed ratio.

Step S203, determining a final demand speed ratio as a maximum value of the first demand speed ratio and the second demand speed ratio;

And step S204, adjusting the required speed ratio of the gearbox according to the final required speed ratio so as to reduce the third rotating speed.

In order to further reduce the actual rotation speed of the engine from the software level, thereby further solving the problem of higher cost of the solution of reverse towing of the engine in the prior art, in an alternative, the required speed ratio of the gearbox is adjusted according to the final required speed ratio, so as to reduce the third rotation speed, which includes: determining whether the final demand speed ratio is equal to the second demand speed ratio; and in the case that the final demand speed ratio is not equal to the second demand speed ratio, adjusting the demand speed ratio of the transmission to the final demand speed ratio to reduce the third rotational speed. Under the condition that the output rotation speed of the gearbox is unchanged, the larger the demand speed ratio is, the smaller the actual rotation speed of the engine is, under the condition that the final demand speed ratio is not equal to the second demand speed ratio, the current demand speed of the gearbox is smaller, the larger final demand speed ratio is assigned to the current demand speed ratio of the gearbox at the moment, so that the current demand speed ratio of the gearbox is increased, the actual rotation speed of the engine is reduced, the effect of inhibiting or even eliminating the reverse dragging phenomenon is achieved, and the problem that the reverse dragging phenomenon is solved through hardware transformation, and the cost is high is further solved.

Further, adjusting the desired speed ratio of the transmission to the final desired speed ratio if the final desired speed ratio is not equal to the second desired speed ratio comprises: setting a speed ratio adjustment status bit to a second value when the final required speed ratio is equal to the second required speed ratio, the speed ratio adjustment status bit being an information bit that characterizes whether to adjust a required speed ratio of the transmission, and determining to adjust the required speed ratio of the transmission when the speed ratio adjustment status bit is the second value; and under the condition that the speed ratio adjustment state bit is the second numerical value, adjusting the required speed ratio of the gearbox to the final required speed ratio. In the embodiment, when the current required speed ratio of the gearbox needs to be adjusted, the speed ratio adjustment state is set to be a second value, so that the adjustment of the required speed ratio of the gearbox is triggered.

In a specific embodiment, the second value is 1. Of course, the second value is not limited to the value 1, and may be any other value, and those skilled in the art may flexibly set the second value according to actual needs.

Additionally, where the final demand speed ratio is equal to the second demand speed ratio, the method further includes: determining a desired speed ratio of the transmission as the second desired speed ratio; and setting a speed ratio adjustment state bit to a first numerical value, wherein the speed ratio adjustment state bit is an information bit for representing whether to adjust the required speed ratio of the gearbox, and determining not to adjust the required speed ratio of the gearbox under the condition that the speed ratio adjustment state bit is the first numerical value. In this embodiment, when the final required speed ratio is equal to the second required speed ratio, it is indicated that the required speed ratio is adjusted at this time, and no adjustment of the required speed ratio of the gearbox is required, and at this time, the speed ratio adjustment status bit is set to the first value, so as to avoid triggering adjustment of the required speed ratio again.

With the described embodiment, first, in the case where a predetermined condition including an actual rotational speed of the vehicle engine being greater than a maximum idle speed of the engine is satisfied, a first demand speed ratio of the transmission is determined from a first rotational speed that characterizes the maximum rotational speed of the engine and a second rotational speed that characterizes the actual rotational speed of the vehicle transmission; then, determining a second required speed ratio of the gearbox according to the actual speed of the vehicle and the actual rotation speed of the engine; determining that the greater of the first demand speed ratio and the second demand speed ratio is the final demand speed ratio of the vehicle; and finally, according to the final required speed ratio, the required speed ratio of the gearbox is adjusted to reduce the actual rotation speed of the vehicle engine and avoid reverse dragging of the engine. According to the method and the device, under the condition that the actual rotation speed of the engine is larger than the preset maximum idle speed, the phenomenon that the engine is reversed is described, at the moment, the first demand speed ratio is determined according to the first rotation speed and the second rotation speed, the second demand speed ratio is determined according to the actual speed of the vehicle and the actual rotation speed of the engine, then the demand speed ratio of the gearbox is adjusted according to the larger value of the two demand speed ratios, the rotation speed of the engine is lowered, the reverse dragging of the engine is realized from the software level, the problem of the reverse dragging can be solved without improving a vehicle power system in terms of hardware, the improvement cost of the vehicle is guaranteed to be lower, and meanwhile, the damage caused by the reverse dragging to the engine and the poor driving experience caused by the reverse dragging are avoided.

In order to enable those skilled in the art to more clearly understand the technical solutions of the present application, the implementation process of the control method of the vehicle of the present application will be described in detail below with reference to specific embodiments.

The embodiment relates to a specific vehicle control method, as shown in fig. 3, including the following steps:

step S1: obtaining the actual rotation speed of the engine and the actual output rotation speed of the gearbox by a speed sensor;

step S2: it is determined whether the actual rotational speed of the engine is greater than the maximum idle speed of the engine and whether the transmission output rotational speed is greater than the minimum rotational speed of the transmission. If not, outputting a second demand speed ratio as the current demand speed ratio calculated according to the vehicle speed and the actual rotation speed of the engine, and the speed ratio adjustment status bit is 0, namely, switching of the demand speed ratio is not performed, and the control method is ended. On the contrary, the actual output speed of the gearbox is divided by the maximum engine speed to calculate the required speed ratio, so that the first required speed ratio is obtained, and the maximum engine speed is smaller than the actual engine speed at the moment, so that the calculated required speed ratio is larger.

Step S3: in order to prevent the calculated first demand speed ratio from being smaller than the second demand speed ratio calculated according to the vehicle speed, the acceleration and the actual rotation speed of the engine, the first demand speed ratio and the second demand speed ratio are taken to be larger, and the final demand speed ratio calculated by the method is obtained.

Step S4: in order to prevent the demand speed ratio from frequently switching back and forth under the working condition, whether the final demand speed ratio calculated by the method is equal to the second demand speed ratio calculated according to the vehicle speed, the acceleration and the actual rotation speed of the engine is further judged. If the two are equal, the switching of the required speed ratio is completed, the speed ratio adjustment status bit is 0, and the switching of the required speed ratio is not performed any more; otherwise, the speed ratio adjustment status bit is 1, and the switching of the required speed ratio is performed. And finally outputting corresponding required speed ratio and speed ratio adjustment status bits, wherein the scheduling period of the control method is ended, and the calculation and judgment of the next scheduling period are continued.

Specifically, the gearbox is a Hydro-mechanical continuously variable transmission (HMCVT), and the control method for modifying the transmission ratio is adopted to solve the problem of reverse towing of an HMCVT engine. The displacement and the rotating speed of the hydraulic pump and the hydraulic motor are modified by modifying the transmission ratio of the HMCVT, so that the rotating speed of the engine is modified, the problem of reverse dragging of the engine is solved from the application software level, and the method is low in cost and wide in application range.

It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is illustrated in the flowcharts, in some cases the steps illustrated or described may be performed in an order other than that illustrated herein.

The embodiment of the application also provides a control device of the vehicle, and the control device of the vehicle can be used for executing the control method for the vehicle. The device is used for implementing the embodiments and the preferred embodiments, and is not described again. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. While the means described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.

The following describes a control device for a vehicle provided in an embodiment of the present application.

Fig. 4 is a schematic view of a control device of a vehicle according to an embodiment of the present application. As shown in fig. 4, the apparatus includes:

a first determining unit 10, configured to determine a first required speed ratio of a transmission of a vehicle according to a first rotational speed and a second rotational speed when a predetermined condition is satisfied, where the first rotational speed is a maximum rotational speed of an engine of the vehicle, the second rotational speed is an actual rotational speed of the transmission, and the predetermined condition includes a third rotational speed that is greater than a maximum idle speed of the engine, and the third rotational speed is the actual rotational speed of the engine;

According to an exemplary embodiment of the present application, the first determining unit 10 includes: and the first determining module is used for determining the first required speed ratio as the ratio of the second rotating speed to the first rotating speed according to the first rotating speed and the second rotating speed. In this embodiment, the first demand speed ratio is determined to be the ratio of the maximum rotational speed of the gearbox to the actual rotational speed of the engine, so that a powerful data support is provided for the subsequent process of determining the final demand speed ratio according to the first demand speed ratio and the second demand speed ratio and controlling the gearbox by adopting the final demand, and further, the subsequent reduction of the rotational speed of the engine is ensured to be effectively realized, thereby further solving the problem of the reverse towing of the engine. The formula of the required speed ratio is as follows: the required speed ratio=the output speed of the gearbox/the actual speed of the engine, when the output speed of the gearbox is unchanged, the larger the required speed ratio is, the smaller the actual speed of the engine is, and the actual speed of the engine is larger than the maximum speed of the engine under the condition of reverse dragging, so that the first required speed ratio obtained according to the maximum speed is larger, the required speed ratio of the gearbox is adjusted according to the first required speed ratio, and the engine speed can be lowered, so that the problem of reverse dragging of the engine is further solved.

A second determining unit 20 for determining a second required speed ratio of the transmission according to an actual vehicle speed of the vehicle and the third rotational speed;

In order to further ensure that the second required speed ratio of the gearbox is determined more simply and quickly, further, the corresponding relation between the vehicle speed and the acceleration of the vehicle is a first corresponding relation, the corresponding relation between the acceleration of the vehicle and the speed ratio change rate is a second corresponding relation, the corresponding relation between the actual rotation speed of the engine and the compensation value of the speed ratio change rate is a third corresponding relation, and the second determining unit 20 includes:

the second determining module is used for determining the acceleration corresponding to the vehicle speed identical to the actual vehicle speed as a target acceleration according to the actual vehicle speed and the first corresponding relation;

the third determining module is used for determining that the speed ratio change rate corresponding to the acceleration identical to the target acceleration is a target speed ratio change rate according to the target acceleration and the second corresponding relation;

A fourth determining module, configured to determine, according to the third rotation speed and the third correspondence, the compensation value corresponding to the actual rotation speed of the engine that is the same as the third rotation speed as a target compensation value;

the calculation module is used for calculating the sum of the target speed ratio change rate and the target compensation value to obtain a demand rate change rate, and obtaining the second demand speed ratio according to the demand rate change rate.

A third determining unit 30 for determining a final demand speed ratio as a maximum value of the first demand speed ratio and the second demand speed ratio;

an adjusting unit 40, configured to adjust a required speed ratio of the transmission according to the final required speed ratio, so as to reduce the third rotational speed.

In order to further reduce the actual rotational speed of the engine from the software level, thereby further solving the problem of the prior art that the engine reverse-towing solution is costly, the adjustment unit 40 comprises, in an alternative: a fifth determination module for determining whether the final demand speed ratio is equal to the second demand speed ratio; and the adjusting module is used for adjusting the required speed ratio of the gearbox to the final required speed ratio so as to reduce the third rotating speed under the condition that the final required speed ratio is not equal to the second required speed ratio. Under the condition that the output rotation speed of the gearbox is unchanged, the larger the demand speed ratio is, the smaller the actual rotation speed of the engine is, under the condition that the final demand speed ratio is not equal to the second demand speed ratio, the current demand speed of the gearbox is smaller, the larger final demand speed ratio is assigned to the current demand speed ratio of the gearbox at the moment, so that the current demand speed ratio of the gearbox is increased, the actual rotation speed of the engine is reduced, the effect of inhibiting or even eliminating the reverse dragging phenomenon is achieved, and the problem that the reverse dragging phenomenon is solved through hardware transformation, and the cost is high is further solved.

Further, the adjustment module includes: the setting submodule is used for setting a speed ratio adjustment state bit to a second numerical value under the condition that the final required speed ratio is equal to the second required speed ratio, wherein the speed ratio adjustment state bit is an information bit for representing whether to adjust the required speed ratio of the gearbox, and determining to adjust the required speed ratio of the gearbox under the condition that the speed ratio adjustment state bit is the second numerical value; and the adjusting sub-module is used for adjusting the required speed ratio of the gearbox to the final required speed ratio under the condition that the speed ratio adjusting state bit is the second numerical value. In the embodiment, when the current required speed ratio of the gearbox needs to be adjusted, the speed ratio adjustment state is set to be a second value, so that the adjustment of the required speed ratio of the gearbox is triggered.

In addition, the device further comprises: a fourth determining unit configured to determine a required speed ratio of the transmission as the second required speed ratio in a case where the final required speed ratio is equal to the second required speed ratio; the setting unit is used for setting a speed ratio adjustment state bit to be a first numerical value, wherein the speed ratio adjustment state bit is an information bit for representing whether the required speed ratio of the gearbox is adjusted, and the required speed ratio of the gearbox is determined not to be adjusted under the condition that the speed ratio adjustment state bit is the first numerical value. In this embodiment, when the final required speed ratio is equal to the second required speed ratio, it is indicated that the required speed ratio is adjusted at this time, and no adjustment of the required speed ratio of the gearbox is required, and at this time, the speed ratio adjustment status bit is set to the first value, so as to avoid triggering adjustment of the required speed ratio again.

With the described embodiment, by means of the first determination unit, in case a predetermined condition is fulfilled, comprising that the actual rotational speed of the vehicle engine is greater than the maximum idle speed of the engine, a first demand speed ratio of the gearbox is determined from a first rotational speed characterizing the maximum rotational speed of the engine and a second rotational speed characterizing the actual rotational speed of the vehicle gearbox; determining a second required speed ratio of the gearbox according to the actual speed of the vehicle and the actual rotation speed of the engine through a second determining unit; determining, by the third determining unit, that the larger of the first demand speed ratio and the second demand speed ratio is a final demand speed ratio of the vehicle; the actual rotating speed of the vehicle engine is reduced by adjusting the required speed ratio of the gearbox according to the final required speed ratio through the adjusting unit, and reverse dragging of the engine is avoided. According to the method and the device, under the condition that the actual rotation speed of the engine is larger than the preset maximum idle speed, the phenomenon that the engine is reversed is described, at the moment, the first demand speed ratio is determined according to the first rotation speed and the second rotation speed, the second demand speed ratio is determined according to the actual speed of the vehicle and the actual rotation speed of the engine, then the demand speed ratio of the gearbox is adjusted according to the larger value of the two demand speed ratios, the rotation speed of the engine is lowered, the reverse dragging of the engine is realized from the software level, the problem of the reverse dragging can be solved without improving a vehicle power system in terms of hardware, the improvement cost of the vehicle is guaranteed to be lower, and meanwhile, the damage caused by the reverse dragging to the engine and the poor driving experience caused by the reverse dragging are avoided.

The control device of the vehicle comprises a processor and a memory, wherein the first determining unit, the second determining unit, the third determining unit, the adjusting unit and the like are all stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions. The modules are all located in the same processor; alternatively, the modules may be located in different processors in any combination.

The processor includes a kernel, and the kernel fetches the corresponding program unit from the memory. The kernel can be provided with one or more than one kernel, and the problem of higher cost of the reverse towing solution of the engine in the prior art is at least solved by adjusting the kernel parameters.

The memory may include volatile memory, random Access Memory (RAM), and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM), among other forms in computer readable media, the memory including at least one memory chip.

The embodiment of the invention provides a computer readable storage medium, which comprises a stored program, wherein when the program runs, equipment where the computer readable storage medium is located is controlled to execute a control method of a vehicle.

Specifically, the control method of the vehicle includes:

The embodiment of the invention provides a processor which is used for running a program, wherein the program runs to execute a control method of a vehicle.

Specifically, the control method of the vehicle includes:

The embodiment of the invention provides an electronic device, which comprises a processor, a memory and a program stored on the memory and capable of running on the processor, wherein the processor realizes at least the following steps when executing the program:

The device herein may be a server, PC, PAD, cell phone, etc.

The present application also provides a computer program product adapted to perform a program initialized with at least the following method steps when executed on a data processing device:

It will be appreciated by those skilled in the art that the modules or steps of the invention described may be implemented in a general purpose computing device, they may be concentrated on a single computing device, or distributed across a network of computing devices, they may be implemented in program code that is executable by computing devices, so that they may be stored in a memory device for execution by computing devices, and in some cases, the steps shown or described may be performed in a different order than that shown or described, or they may be separately fabricated into individual integrated circuit modules, or multiple modules or steps of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

In one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.

The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, etc., such as Read Only Memory (ROM) or flash RAM. Memory is an example of a computer-readable medium.

Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.

From the above description, it can be seen that the embodiments described herein achieve the following technical effects:

1) In the control method of the vehicle of the present application, first, in the case where a predetermined condition including that an actual rotational speed of an engine of the vehicle is greater than a maximum idle speed of the engine is satisfied, a first required speed ratio of a transmission is determined from a first rotational speed that characterizes the maximum rotational speed of the engine and a second rotational speed that characterizes the actual rotational speed of the transmission of the vehicle; then, determining a second required speed ratio of the gearbox according to the actual speed of the vehicle and the actual rotation speed of the engine; determining that the greater of the first demand speed ratio and the second demand speed ratio is the final demand speed ratio of the vehicle; and finally, according to the final required speed ratio, the required speed ratio of the gearbox is adjusted to reduce the actual rotation speed of the vehicle engine and avoid reverse dragging of the engine. According to the method and the device, under the condition that the actual rotation speed of the engine is larger than the preset maximum idle speed, the phenomenon that the engine is reversed is described, at the moment, the first demand speed ratio is determined according to the first rotation speed and the second rotation speed, the second demand speed ratio is determined according to the actual speed of the vehicle and the actual rotation speed of the engine, then the demand speed ratio of the gearbox is adjusted according to the larger value of the two demand speed ratios, the rotation speed of the engine is lowered, the reverse dragging of the engine is realized from the software level, the problem of the reverse dragging can be solved without improving a vehicle power system in terms of hardware, the improvement cost of the vehicle is guaranteed to be lower, and meanwhile, the damage caused by the reverse dragging to the engine and the poor driving experience caused by the reverse dragging are avoided.

2) In the control device of the vehicle of the present application, the first demand speed ratio of the transmission is determined by the first determining unit according to the first rotational speed representing the maximum rotational speed of the engine and the second rotational speed representing the actual rotational speed of the transmission of the vehicle, in the case where a predetermined condition including that the actual rotational speed of the engine of the vehicle is greater than the maximum idle speed of the engine is satisfied; determining a second required speed ratio of the gearbox according to the actual speed of the vehicle and the actual rotation speed of the engine through a second determining unit; determining, by the third determining unit, that the larger of the first demand speed ratio and the second demand speed ratio is a final demand speed ratio of the vehicle; the actual rotating speed of the vehicle engine is reduced by adjusting the required speed ratio of the gearbox according to the final required speed ratio through the adjusting unit, and reverse dragging of the engine is avoided. According to the method and the device, under the condition that the actual rotation speed of the engine is larger than the preset maximum idle speed, the phenomenon that the engine is reversed is described, at the moment, the first demand speed ratio is determined according to the first rotation speed and the second rotation speed, the second demand speed ratio is determined according to the actual speed of the vehicle and the actual rotation speed of the engine, then the demand speed ratio of the gearbox is adjusted according to the larger value of the two demand speed ratios, the rotation speed of the engine is lowered, the reverse dragging of the engine is realized from the software level, the problem of the reverse dragging can be solved without improving a vehicle power system in terms of hardware, the improvement cost of the vehicle is guaranteed to be lower, and meanwhile, the damage caused by the reverse dragging to the engine and the poor driving experience caused by the reverse dragging are avoided.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A control method of a vehicle, characterized by comprising:

determining a first required speed ratio of a gearbox of a vehicle according to a first rotating speed and a second rotating speed under the condition that a preset condition is met, wherein the first rotating speed is the maximum rotating speed of an engine of the vehicle, the second rotating speed is the actual rotating speed of the gearbox, the preset condition comprises that a third rotating speed is larger than the maximum idle speed of the engine, and the third rotating speed is the actual rotating speed of the engine;

determining a second required speed ratio of the gearbox according to the actual speed of the vehicle and the third rotating speed;

determining a final demand speed ratio as a maximum of the first demand speed ratio and the second demand speed ratio;

and adjusting the required speed ratio of the gearbox according to the final required speed ratio so as to reduce the third rotating speed.

2. The method of claim 1, wherein determining a first desired speed ratio of a transmission of the vehicle based on the first rotational speed and the second rotational speed comprises:

and determining that the first demand speed ratio is the ratio of the second rotating speed to the first rotating speed according to the first rotating speed and the second rotating speed.

3. The method according to claim 1, wherein the correspondence between the vehicle speed and the acceleration of the vehicle is a first correspondence, the correspondence between the acceleration of the vehicle and the speed ratio change rate is a second correspondence, the correspondence between the actual rotation speed of the engine and the compensation value of the speed ratio change rate is a third correspondence, and determining the second required speed ratio according to the actual vehicle speed and the third rotation speed of the vehicle includes:

determining the acceleration corresponding to the vehicle speed identical to the actual vehicle speed as a target acceleration according to the actual vehicle speed and the first corresponding relation;

according to the target acceleration and the second corresponding relation, determining the speed ratio change rate corresponding to the acceleration identical to the target acceleration as a target speed ratio change rate;

Determining the compensation value corresponding to the actual rotation speed of the engine, which is the same as the third rotation speed, as a target compensation value according to the third rotation speed and the third corresponding relation;

and calculating the sum of the target speed ratio change rate and the target compensation value to obtain a demand rate change rate, and obtaining the second demand speed ratio according to the demand rate change rate.

4. A method according to any one of claims 1 to 3, wherein adjusting the required speed ratio of the gearbox to reduce the third rotational speed according to the final required speed ratio comprises:

determining whether the final demand speed ratio is equal to the second demand speed ratio;

and in the case that the final demand speed ratio is not equal to the second demand speed ratio, adjusting the demand speed ratio of the transmission to the final demand speed ratio to reduce the third rotational speed.

5. The method of claim 4, wherein, in the event that the final demand speed ratio is equal to the second demand speed ratio, the method further comprises:

determining a desired speed ratio of the transmission as the second desired speed ratio;

and setting a speed ratio adjustment state bit to a first numerical value, wherein the speed ratio adjustment state bit is an information bit for representing whether to adjust the required speed ratio of the gearbox, and determining not to adjust the required speed ratio of the gearbox under the condition that the speed ratio adjustment state bit is the first numerical value.

6. The method of claim 4, wherein adjusting the desired speed ratio of the transmission to the final desired speed ratio if the final desired speed ratio is not equal to the second desired speed ratio comprises:

setting a speed ratio adjustment status bit to a second value when the final required speed ratio is equal to the second required speed ratio, the speed ratio adjustment status bit being an information bit that characterizes whether to adjust a required speed ratio of the transmission, and determining to adjust the required speed ratio of the transmission when the speed ratio adjustment status bit is the second value;

and under the condition that the speed ratio adjustment state bit is the second numerical value, adjusting the required speed ratio of the gearbox to the final required speed ratio.

7. A method according to any one of claims 1 to 3, wherein the predetermined condition further comprises the second rotational speed being greater than a preset minimum rotational speed of the gearbox.

8. A control device for a vehicle, comprising:

a first determining unit, configured to determine a first required speed ratio of a transmission of a vehicle according to a first rotation speed and a second rotation speed when a predetermined condition is satisfied, where the first rotation speed is a maximum rotation speed of an engine of the vehicle, the second rotation speed is an actual rotation speed of the transmission, the predetermined condition includes that a third rotation speed is greater than a maximum idle speed of the engine, and the third rotation speed is the actual rotation speed of the engine;

A second determining unit configured to determine a second required speed ratio of the transmission according to an actual vehicle speed of the vehicle and the third rotational speed;

a third determining unit configured to determine a final demand speed ratio as a maximum value of the first demand speed ratio and the second demand speed ratio;

and the adjusting unit is used for adjusting the required speed ratio of the gearbox according to the final required speed ratio so as to reduce the third rotating speed.

9. A processor for running a program, wherein the program when run performs the method of any one of claims 1 to 7.

10. An electronic device, comprising: one or more processors, memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs comprising instructions for performing the method of any of claims 1-7.