CN116927964A

CN116927964A - Control method and device for engine air inflow and electronic equipment

Info

Publication number: CN116927964A
Application number: CN202311027180.8A
Authority: CN
Inventors: 曹石; 李国朋; 田常玲
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: 2023-08-15
Filing date: 2023-08-15
Publication date: 2023-10-24

Abstract

The application provides a control method and device of engine air inflow and electronic equipment, wherein the method comprises the following steps: acquiring a first corresponding relation, wherein the first corresponding relation is a corresponding relation among a temperature, an idling set value and a torque set value of an engine when the engine is characterized in delivery; in the use process of the engine after leaving the factory, under the condition that the vehicle is in an idle state, determining a target idle torque according to the corresponding temperature in the idle state, the corresponding idle setting value and the first corresponding relation; calculating a difference value between the actual idle torque and the target idle torque, and determining a first correction value according to the difference value, the idle setting value and the second corresponding relation; correcting the setting value of the minimum charge according to at least the first correction value to obtain a final setting value of the minimum charge; and controlling the air inflow of the engine according to the final set value. The application solves the problem that the existing preset value of the minimum charge cannot meet the normal operation of the engine.

Description

Control method and device for engine air inflow and electronic equipment

Technical Field

The application relates to the technical field of engines, in particular to a control method and device for air inflow of an engine and electronic equipment.

Background

The charge, namely the charge coefficient and the volumetric efficiency, refers to the ratio of the fresh air mass actually sucked into a cylinder per cylinder to the air mass which is theoretically calculated to fill the working volume of the cylinder in an air inlet state, and the natural gas engine is controlled by adopting the concept of the charge, so that the required torque is required to be converted into the charge. Unlike diesel engines, most of the current natural gas engines are single-point injection of an air inlet channel, and a certain delay exists from the injection of natural gas to the injection of the natural gas into a cylinder, so that the minimum charge is required to be set as feed-forward of engine control during the control of the natural gas engine to maintain the basic operation of the engine, and the condition that the engine speed undershoots and even extinguishes due to slow response of the natural gas during the working condition change is prevented.

In the existing control strategy, along with the aging of an engine and related accessories in the using process, the preset minimum charge cannot meet the normal use when leaving the factory, and the problems that the engine cannot return to the idle speed normally (namely returns to the idle state) or the rotating speed undershoot is lower than the normal idle speed when returning to the idle speed and the like occur, so that the normal use of a user is influenced.

Disclosure of Invention

The application mainly aims to provide a control method, a device and electronic equipment for the air inflow of an engine, so as to at least solve the problem that the preset value of the minimum charge in the prior art cannot meet the normal operation of the engine.

In order to achieve the above object, according to one aspect of the present application, there is provided a control method of an engine intake air amount, comprising: acquiring a first corresponding relation, wherein the first corresponding relation is a corresponding relation among a temperature, an idle speed set value and a torque set value of an engine when the engine is characterized in delivery, the idle speed set value is an engine rotating speed value preset by a vehicle in an idle state, the idle state is a state that the engine is operated under a neutral gear condition, and the torque set value is a torque set value of the engine when the vehicle is in the idle state; in the use process of the engine after leaving the factory, determining the torque set value corresponding to the temperature of the engine and the idle set value in the idle state of the vehicle in the first corresponding relation as a target idle torque according to the temperature of the engine in the idle state of the vehicle and the corresponding relation between the idle set value and the first corresponding relation; calculating a difference value between an actual idle torque and the target idle torque, and determining a correction value of the minimum charge of the engine corresponding to the idle setting value and the difference value which is the same as the difference value and the idle setting value in a second corresponding relation as a first correction value according to the difference value, the idle setting value and the second corresponding relation; correcting the setting value of the minimum charge according to at least the first correction value to obtain a final setting value of the minimum charge; and controlling the air inflow of the engine according to the final set value.

Optionally, after determining, according to the difference value, the idle setting value, and the second correspondence relationship, that the difference value identical to the difference value and the idle setting value in the second correspondence relationship and the correction value of the minimum charge of the engine corresponding to the idle setting value are the first correction value, the method further includes: establishing a third corresponding relation according to the temperature, the idle speed set value and the corresponding first correction value, wherein the third corresponding relation is a corresponding relation between the first correction value of the engine, the temperature and the idle speed set value in the representation of the use process; under the condition that the vehicle is powered down, storing the third corresponding relation into a nonvolatile memory; under the condition that the vehicle is electrified and in the idle state, acquiring the current temperature and the current idle speed set value of the engine; and calling the third corresponding relation from the nonvolatile memory, and determining that the first correction value corresponding to the temperature and the idle speed set value, which are the same as the current temperature and the current idle speed set value, in the third corresponding relation is the current correction value of the engine according to the current temperature, the current idle speed set value and the third corresponding relation.

Optionally, determining, according to the current temperature, the current idle speed setting value, and the third corresponding relation, that the first correction value corresponding to the temperature and the idle speed setting value, which are the same as the current temperature and the current idle speed setting value, in the third corresponding relation is the current correction value of the engine, including: according to the current temperature and the current idle speed set value, searching the first correction value corresponding to the temperature and the idle speed set value which are the same as the current temperature and the current idle speed set value from a third corresponding relation table to obtain the current correction value, wherein the third corresponding relation table comprises a plurality of third arrays, and each third array comprises: the temperature, the idle setting, and the first correction value.

Optionally, the method further comprises: acquiring a current attitude angle of the vehicle, wherein the current attitude angle comprises a current pitch angle and/or a current roll angle; determining whether a transmission gear of the vehicle in the idle state is a neutral gear; when the transmission gear in the idle state is the neutral gear and is changed from the neutral gear to a non-neutral gear, determining, from the current attitude angle and a fourth correspondence, that a correction value of the minimum charge corresponding to an attitude angle identical to the current attitude angle in the fourth correspondence is a second correction value; and when the transmission gear in the idle state is not the neutral gear, determining that the correction value of the minimum charge corresponding to the same attitude angle as the current attitude angle in a fifth corresponding relation is a third correction value according to the current attitude angle and the fifth corresponding relation.

Optionally, correcting the setting of the minimum charge based on at least the first correction value to obtain a final setting of the minimum charge, including one of: calculating a sum of the first correction value, the second correction value, and the minimum charge setting value to obtain the final setting value; and calculating the sum of the first correction value, the third correction value and the setting value of the minimum charge to obtain the final setting value.

Optionally, the method further comprises: calculating a sum of the second correction value and the minimum charge set value to obtain the final set value when the transmission gear in the idle state is the neutral gear and is changed from the neutral gear to a non-neutral gear; and calculating the sum of the third correction value and the minimum charge set value to obtain the final set value when the transmission gear in the idle state is not the neutral gear.

Optionally, determining, according to the temperature of the engine of the vehicle in the idle state and the first correspondence between the idle setting value and the first correspondence, the torque setting value corresponding to the temperature of the engine of the vehicle in the idle state and the idle setting value in the first correspondence as the target idle torque includes: according to the temperature and the idle speed set value corresponding to the idle speed state, searching the torque set value corresponding to the idle speed set value and the temperature which is the same as the temperature and the idle speed set value corresponding to the idle speed state in a first corresponding relation table to obtain the target idle speed torque, wherein the first corresponding relation table comprises a plurality of first arrays, and each first array comprises: the temperature, the idle setting, and the torque setting; according to the difference value, the idle speed set value and a second corresponding relation, determining that a correction value of the minimum charge of the engine corresponding to the difference value and the idle speed set value, which are the same as the difference value and the idle speed set value, in the second corresponding relation is a first correction value, including: and searching the correction value corresponding to the idle speed set value and the difference value which is the same as the difference value and the idle speed set value in a second corresponding relation table according to the difference value and the idle speed set value to obtain the first correction value, wherein the second corresponding relation table comprises a plurality of second groups, and each second group comprises the difference value, the idle speed set value and the correction value.

Optionally, correcting the setting of the minimum charge to obtain a final setting of the minimum charge based on at least the first correction value, including: and calculating the sum of the first correction value and the setting value of the minimum charge to obtain the final setting value.

According to another aspect of the present application, there is provided a control apparatus of an engine intake air amount, comprising: the first obtaining unit is used for obtaining a first corresponding relation, wherein the first corresponding relation is a corresponding relation among a temperature, an idle speed set value and a torque set value of an engine when the engine is characterized in delivery, the idle speed set value is an engine rotating speed value preset by a vehicle in an idle state, the idle state is a state that the engine is operated under a neutral gear condition, and the torque set value is a torque set value of the engine when the vehicle is in the idle state; a first determining unit, configured to determine, during use of the engine after leaving the factory, that the torque set value corresponding to the temperature of the engine and the idle set value of the vehicle in the idle state in the first corresponding relationship is a target idle torque according to the temperature of the engine of the vehicle in the idle state and the idle set value and the first corresponding relationship; a first calculating unit, configured to calculate a difference between an actual idle torque and the target idle torque, and determine, according to the difference, the idle setting value, and a second correspondence, that a correction value of a minimum charge of the engine corresponding to the difference, which is the same as the difference and the idle setting value, and the idle setting value in the second correspondence is a first correction value; a correction unit, configured to correct the setting value of the minimum charge according to at least the first correction value, to obtain a final setting value of the minimum charge; and the control unit is used for controlling the air inflow of the engine according to the final set value.

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 applying the technical scheme of the application, the influence of aging of related components on the minimum charge is considered along with the increase of the service time of the vehicle and the engine, and the correction value of the minimum charge in idling is confirmed according to the difference value of the target idling torque and the current actual idling torque, so that the setting value of the minimum charge is adjusted, the problem that the setting value of the minimum charge in leaving the factory cannot be used due to the change of the friction resistance of the engine and accessories after the engine is used for a period of time, the rotating speed of the engine cannot be returned to a normal idling value after the throttle is released, or the rotating speed of the engine is excessively high after the throttle is released from a high rotating speed to an idling speed is solved, and the corrected minimum charge can meet the normal operation of the engine.

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 specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

fig. 1 shows a block diagram of a hardware configuration of a mobile terminal that performs a control method of an engine intake air amount provided in an embodiment according to the present application;

fig. 2 shows a flowchart of a control method of an engine intake air amount provided according to an embodiment of the present application;

fig. 3 shows a flowchart of another control method of the engine intake air amount provided according to an embodiment of the application;

fig. 4 shows a flowchart of still another control method of the engine intake air amount provided according to an embodiment of the application;

fig. 5 shows a flowchart of still another control method of the engine intake air amount provided according to an embodiment of the application;

fig. 6 shows a block diagram of a control apparatus of an engine intake air amount provided 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, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which 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 those skilled in the art based on the embodiments of the present application 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 application 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 preset value of the minimum charge in the prior art cannot meet the normal operation of the engine, and in order to solve the technical problems, the embodiment of the application provides a control method, a device and electronic equipment for the air inflow of the engine.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.

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 a mobile terminal as an example, fig. 1 is a block diagram of a hardware structure of a mobile terminal of a control method of engine intake air amount according to an embodiment of the present application. 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 a computer program, for example, a software program of application software and a module, such as a computer program corresponding to a control method of an engine intake air amount in the embodiment of the present invention, and the processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, implements 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, there is provided a control method of an engine intake air amount operating on a mobile terminal, a computer terminal or the like, it is to be noted that the steps shown in the flowchart of the drawing 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 flowchart, in some cases, the steps shown or described may be executed in an order different from that shown here.

Fig. 2 is a flowchart of a control method of an engine intake air amount according to an embodiment of the application. As shown in fig. 2, the method comprises the steps of:

step S201, obtaining a first corresponding relation, wherein the first corresponding relation is a corresponding relation among a temperature, an idle speed set value and a torque set value of an engine when the engine is characterized in delivery, the idle speed set value is an engine rotating speed value preset by a vehicle in an idle state, the idle state is a state that the engine is operated under a neutral gear condition, and the torque set value is a torque set value of the engine when the vehicle is in the idle state;

specifically, the first corresponding relationship is a corresponding relationship among a temperature, an idle speed set value and a torque set value corresponding to the engine when the engine leaves a factory and calibrated in advance, and the first corresponding relationship can be obtained by calibrating in a real vehicle test or can be obtained by adopting the existing corresponding relationship in the engine calibration process. Specific calibration for certain parameters of the engine belongs to the prior art, and will not be described in detail here. The first correspondence may be stored in a table form in the memory, or may be stored in other forms.

Step S202, in the using process of the engine after leaving factory, determining the torque set value corresponding to the temperature of the engine and the idle set value of the vehicle in the idle state in the first corresponding relation as a target idle torque according to the temperature of the engine in the idle state of the vehicle and the corresponding relation between the idle set value and the first corresponding relation;

specifically, the temperature value which is the same as the temperature of the engine in the idle state and obtained in the use process after the delivery of the engine is searched in the first corresponding relation, the value which is the same as the idle setting value of the vehicle in the idle state is searched in the first corresponding relation, and the torque setting value corresponding to the temperature value and the idle setting value is determined as the target idle torque.

Step S203, calculating a difference value between an actual idle torque and the target idle torque, and determining a correction value of the minimum charge of the engine corresponding to the difference value and the idle setting value, which is the same as the difference value and the idle setting value, in the second corresponding relation as a first correction value according to the difference value, the idle setting value and the second corresponding relation;

specifically, the difference value which is the same as the difference value between the actual idle torque and the target idle torque is searched in the second corresponding relation, the value which is the same as the idle setting value is searched in the second corresponding relation, and the correction value of the minimum charge corresponding to the difference value and the target idle torque is determined as a first correction value. The second corresponding relation is a corresponding relation among a difference value corresponding to the pre-calibrated engine, an idle speed set value and a correction value of the minimum charge, and the second corresponding relation can be obtained by calibrating in a real vehicle test or can be obtained by adopting the existing corresponding relation in the engine calibration process. The minimum charge is a sufficient value to meet the target engine operation without flameout.

Step S204, correcting the setting value of the minimum charge at least according to the first correction value to obtain the final setting value of the minimum charge;

specifically, there are various ways of correcting the set value according to the correction value, for example, adding or subtracting the correction value to the set value to obtain a final set value; for another example, the final set value is obtained by multiplying the correction value and/or the set value by a predetermined coefficient and then performing addition and subtraction. The person skilled in the art can flexibly set the correction mode according to the actual situation, and the application is not particularly limited thereto.

Step S205, controlling the engine intake air amount according to the final set value.

Through the embodiment, a first corresponding relation representing the corresponding relation among the temperature of the engine when leaving the factory, an idle speed set value and a torque set value in an idle speed state is firstly obtained; then, when the engine is in an idle state in the use process after leaving the factory, determining a temperature under the current working condition and a target idle torque corresponding to an idle setting value according to a first corresponding relation; then, according to the second corresponding relation, determining a difference value between the actual idle torque and the target idle torque under the current working condition and a correction value of the minimum charge of the engine corresponding to the idle setting value; correcting the setting value of the lowest charge at least according to the correction value to obtain a final setting value; finally, the engine intake air amount is controlled at the determined final set value. The application considers the influence of aging of related components on the minimum charge along with the increase of the service time of the vehicle and the engine, and confirms the correction value of the minimum charge in idling according to the difference value of the target idling torque and the current actual idling torque, thereby adjusting the setting value of the minimum charge, effectively solving the problems that the setting value of the minimum charge in leaving factory cannot be used due to the change of the friction resistance of the engine and accessories after the engine is used for a period of time, the rotating speed of the engine cannot return to a normal idling value after the throttle is released, or the rotating speed of the engine is excessively high when the engine returns to idling from a high rotating speed after the throttle is released, and the like, and ensuring that the corrected minimum charge can meet the normal running of the engine.

In the practical application process, because the natural gas engine has lower charging efficiency and has a certain distance from a throttle valve on an air inlet pipe to an engine cylinder, the air inlet amount from the set air inlet amount to the air inlet amount actually fed into the cylinder is delayed to a certain extent, so that the transient response of the engine is influenced, and particularly, in order to prevent the undershoot and even flameout of the engine rotation speed when the whole vehicle starts and runs in idle gear, the concept of minimum charge is set in an engine control system, and the rotation speed stability of the engine is ensured by presetting the feedforward amount of the engine control. The minimum charge size setting principle at idle speed is as follows: the engine speed is maintained slightly below the normal idle speed value after the engine friction is overcome by the minimum charge, for example, the engine speed is maintained to 650rpm by the minimum charge when the engine is at normal idle speed of 700 rpm. However, in the actual running process, as the engine and related accessories age or are replaced, the friction resistance of the engine and the accessories changes, so that the preset minimum charge cannot meet the normal use when leaving the factory, the problems that the engine cannot return to the idle speed normally or the rotating speed undershoot is lower than the normal idle speed when returning to the idle speed and the like occur, the normal use of a user is affected, the problems can be effectively solved through the scheme of the application, and the normal use of a vehicle is met.

The first correspondence may be stored in a table form in the nonvolatile memory, or may be stored in another form. According to some embodiments of the present application, determining, according to the temperature of the engine of the vehicle in the idle state, the idle setting value, and the first correspondence, the torque setting value corresponding to the temperature of the engine of the vehicle in the idle state and the idle setting value in the first correspondence as a target idle torque includes: according to the temperature and the idle speed set value corresponding to the idle speed state, searching the torque set value corresponding to the idle speed set value and the temperature which is the same as the temperature and the idle speed set value corresponding to the idle speed state in a first corresponding relation table to obtain the target idle speed torque, wherein the first corresponding relation table comprises a plurality of first arrays, and each first array comprises: the temperature, the idle setting, and the torque setting. The target idle torque is determined through table lookup, so that the data processing speed is further increased, and the processing difficulty is simplified.

In addition to the above, in other embodiments, determining, in the first correspondence, the torque set value corresponding to the temperature of the engine and the idle set value of the vehicle in the idle state as the target idle torque according to the temperature of the engine of the vehicle in the idle state, the idle set value, and the first correspondence, includes: establishing a first neural network representing the first corresponding relation, wherein the first neural network is trained by machine learning by using a plurality of groups of data, and each group of data in the plurality of groups of data comprises: temperature, idle speed set point and torque set point; and inputting the temperature and the idle speed set value corresponding to the idle speed state into the first neural network to obtain the target idle speed torque.

The second correspondence may be stored in the nonvolatile memory in a table form, or may be stored in another form. To further increase the data processing speed, in still other exemplary embodiments, determining, according to the difference value, the idle setting value, and a second correspondence relationship, a correction value of a minimum charge of the engine corresponding to the idle setting value and the difference value that is the same as the difference value and the idle setting value in the second correspondence relationship as a first correction value includes: and searching the correction value corresponding to the idle speed set value and the difference value which is the same as the difference value and the idle speed set value in a second corresponding relation table according to the difference value and the idle speed set value to obtain the first correction value, wherein the second corresponding relation table comprises a plurality of second groups, and each second group comprises the difference value, the idle speed set value and the correction value.

In addition to the foregoing manner, in other embodiments, determining, according to the difference value, the idle setting value, and the second correspondence relationship, a correction value of a minimum charge of the engine corresponding to the idle setting value and the difference value that is the same as the difference value and the idle setting value in the second correspondence relationship as a first correction value includes: establishing a second neural network representing the second corresponding relation, wherein the second neural network is trained by machine learning by using a plurality of groups of data, and each group of data in the plurality of groups of data comprises: a difference between the actual idle torque and the target idle torque, an idle setting value and a torque setting value; and inputting the difference value and the idle speed set value corresponding to the idle speed state into the second neural network to obtain the first corrected value.

In the actual application process, as shown in fig. 3, step S203: according to the difference value, the idle speed set value and a second corresponding relation, determining that a correction value of the minimum charge of the engine corresponding to the difference value and the idle speed set value, which are the same as the difference value and the idle speed set value, in the second corresponding relation is a first correction value, including: step S2031: determining whether the transmission gear is 0; step S2032: and when the gear of the transmission is 0, determining that a correction value of the minimum charge of the engine corresponding to the idle speed set value and the difference value which is the same as the difference value and the idle speed set value in the second corresponding relation is the first correction value according to the difference value, the idle speed set value and the second corresponding relation.

In an alternative, in step S203: after determining that a correction value of a minimum charge of the engine corresponding to the idle speed set point and the difference value identical to the difference value and the idle speed set point in the second corresponding relation is a first correction value according to the difference value, the idle speed set point and the second corresponding relation, the method further includes: establishing a third corresponding relation according to the temperature, the idle speed set value and the corresponding first correction value, wherein the third corresponding relation is a corresponding relation between the first correction value of the engine, the temperature and the idle speed set value in the representation of the use process; under the condition that the vehicle is powered down, storing the third corresponding relation into a nonvolatile memory; under the condition that the vehicle is electrified and in the idle state, acquiring the current temperature and the current idle speed set value of the engine; and calling the third corresponding relation from the nonvolatile memory, and determining that the first correction value corresponding to the temperature and the idle speed set value, which are the same as the current temperature and the current idle speed set value, in the third corresponding relation is the current correction value of the engine according to the current temperature, the current idle speed set value and the third corresponding relation.

In the embodiment, the idle load working condition is taken as the specific working condition of the correction value self-learning of the minimum charge, and the third corresponding relation among the correction value of the minimum charge, the temperature value and the idle set value under the working condition is established according to the difference value and the idle set value, so that in the use process of the engine after delivery, the first correction value under the current working condition can be quickly and conveniently determined by searching the third corresponding relation according to the temperature and the idle set value under the real-time working condition, the normal operation of the current engine can be met according to the minimum charge corrected by the first correction value, and the problem that the minimum charge set value cannot be met in delivery due to the change of friction resistance of the engine and accessories after the engine is used for a period of time is further solved.

In addition, each time the vehicle is powered down, the obtained third corresponding relation is stored in the nonvolatile memory, so that the problem that the third corresponding relation is lost after the vehicle is powered down can be effectively prevented, and the safe storage of the third corresponding relation is further ensured.

Specifically, the nonvolatile memory may be any suitable nonvolatile memory in a vehicle, such as EEPROM (Electrically Erasable Programmable Read Only Memory, electrically erasable and rewritable read only memory) or the like.

In the actual application process, the third correspondence may be stored in a table form in the nonvolatile memory, or may be stored in other forms. In order to further increase the data processing speed, in still another exemplary aspect, according to the current temperature, the current idle setting value, and the third correspondence, determining, in the third correspondence, the first correction value corresponding to the temperature and the idle setting value that are the same as the current temperature and the current idle setting value is a current correction value of the engine, includes: according to the current temperature and the current idle speed set value, searching the first correction value corresponding to the temperature and the idle speed set value which are the same as the current temperature and the current idle speed set value from a third corresponding relation table to obtain the current correction value, wherein the third corresponding relation table comprises a plurality of third arrays, and each third array comprises: the temperature, the idle setting, and the first correction value.

In addition to the above manner, in other embodiments, according to the current temperature, the current idle setting value, and the third correspondence, determining, in the third correspondence, the first correction value corresponding to the temperature and the idle setting value that are the same as the current temperature and the current idle setting value is a current correction value of the engine, including: establishing a third neural network representing the third corresponding relation, wherein the third neural network is trained by machine learning by using a plurality of groups of data, and each group of data in the plurality of groups of data comprises: a temperature of the engine, an idle setting, and a first correction to the minimum charge; and inputting the current temperature and the current idle speed set value into the third neural network to obtain the current correction value.

In another alternative embodiment, as depicted in fig. 4, the method further comprises: step S301: acquiring a current attitude angle of the vehicle, wherein the current attitude angle comprises a current pitch angle and/or a current roll angle; step S302: determining whether a transmission gear of the vehicle in the idle state is a neutral gear; step S303: determining, in a case where the transmission gear in the idle state is the neutral gear and is changed from the neutral gear to a non-neutral gear, that is, in a case where the vehicle is in an idle start stage, a correction value of the minimum charge corresponding to an attitude angle identical to the current attitude angle in a fourth correspondence relation as a second correction value according to the current attitude angle and the fourth correspondence relation; step S304: and when the transmission gear in the idle state is not the neutral gear, that is, when the vehicle is in a gear stage, determining that the correction value of the minimum charge corresponding to the same attitude angle as the current attitude angle in the fifth corresponding relation is a third correction value according to the current attitude angle and the fifth corresponding relation. In the application, besides considering the influence of aging of related components on the minimum charge along with the increase of the service time of the vehicle and the engine, the application also considers the difference of idle starting of the vehicle under different gradients and the requirement on the engine load in gear, determines the second correction value of the minimum charge corresponding to the current gradient according to the current attitude angle representing the gradient of the vehicle and the fourth corresponding relation in the idle starting stage, and determines the corresponding third correction according to the current attitude angle representing the gradient of the vehicle and the fifth corresponding relation in the gear stage, thereby further ensuring that the corrected minimum charge can meet the normal operation of the engine.

Specifically, the fourth correspondence and the fifth correspondence may be a correspondence between a pitch angle of the vehicle and a correction value of the minimum charge, a correspondence between a roll angle of the vehicle and a correction value of the minimum charge, or a correspondence between a pitch angle of the vehicle, a roll angle of the vehicle, and a correction value of the minimum charge, respectively.

In the actual application process, the fourth corresponding relationship and the fifth corresponding relationship may be stored in a table form in the nonvolatile memory, or may be stored in other forms. The specific implementation manner of the second correction value corresponding to the fourth corresponding relationship is described below by taking the fourth corresponding relationship as an example, and the principle of the fifth corresponding relationship is the same as that of the fourth corresponding relationship, which is not described herein.

In order to further increase the data processing speed, specifically, according to the current attitude angle and the fourth corresponding relationship, an implementation manner of determining, as the second correction value, the correction value of the minimum charge corresponding to the same attitude angle as the current attitude angle in the fourth corresponding relationship may be: according to the current attitude angle, searching a correction value of the minimum charge corresponding to the attitude angle which is the same as the current attitude angle from a fourth corresponding relation table to obtain the second correction value, wherein the fourth corresponding relation table comprises a plurality of fourth arrays, and each fourth array comprises: attitude angle and a second correction value.

In addition to the above manner, in other embodiments, according to the current attitude angle and a fourth correspondence relationship, determining, as a second correction value, the correction value of the minimum charge corresponding to the same attitude angle as the current attitude angle in the fourth correspondence relationship includes: establishing a fourth neural network representing the fourth corresponding relation, wherein the fourth neural network is trained by machine learning by using a plurality of groups of data, and each group of data in the plurality of groups of data comprises: a second correction value for the attitude angle and the minimum charge of the vehicle; and inputting the current attitude angle into the fourth neural network to obtain the second correction value.

To further ensure that the minimum charge meets the normal operating requirements of the engine, in one particular embodiment, the setting of the minimum charge is modified based on at least the first modification value to obtain a final setting of the minimum charge, including one of: calculating a sum of the first correction value, the second correction value, and the minimum charge setting value to obtain the final setting value; and calculating the sum of the first correction value, the third correction value and the setting value of the minimum charge to obtain the final setting value.

In other embodiments, the method further comprises: calculating a sum of the second correction value and the minimum charge set value to obtain the final set value when the transmission gear in the idle state is the neutral gear and is changed from the neutral gear to a non-neutral gear; and calculating the sum of the third correction value and the minimum charge set value to obtain the final set value when the transmission gear in the idle state is not the neutral gear.

Further, when the vehicle is in an idle state, correcting the setting value of the minimum charge based on at least the first correction value to obtain a final setting value of the minimum charge, including: and calculating the sum of the first correction value and the setting value of the minimum charge to obtain the final setting value.

In order to enable those skilled in the art to more clearly understand the technical scheme of the present application, the implementation process of the control method of the engine intake air amount of the present application will be described in detail with reference to specific embodiments.

Considering the influence of the friction resistance change on the engine control after the aging of the whole vehicle, the engine and related accessories, the embodiment relates to a specific control method of the engine air inflow, as shown in fig. 5, comprising the following steps:

Step S1: acquiring parameters such as engine speed, gearbox gear, engine temperature, idle speed set value, information representing whether the engine is in an idle state, idle speed torque, real-time gradient (also called attitude angle) and the like;

step S2: establishing a MAP1 table representing a first corresponding relation through the temperature of the engine, the idle speed set value and the target idle speed torque of the engine when the engine is idle;

step S3: establishing a self-learning MAP2 table of the minimum charge representing a third corresponding relation through the temperature of the engine and an idle speed set value, wherein the initial value of the correction value of the minimum charge in the MAP2 table is 0;

step S4: determining whether the vehicle is in an idle state according to the information representing whether the vehicle is in the idle state;

step S5: under the condition that the vehicle is in an idle state, judging whether the gear of the gearbox is 0, namely whether the gear is a neutral gear, if so, executing a step S6, and if not, executing a step S12;

step S6: under the condition that the gear of the gearbox is 0, calculating the difference value between the current actual idle torque and the preset target idle torque;

step S7: searching a preset MAP3 representing a second corresponding relation through the difference value and the idle speed set value to obtain a correction value 1 of the minimum charge, filling the correction value 1 into a corresponding position in a self-learning MAP2 table, and storing the MAP2 table into an EEPROM when power is off;

Step S8: judging whether the gear of the gearbox is separated from the neutral gear or not, namely, whether the gear of the gearbox is changed from 0 to other values or not;

step S9: under the condition that the gear of the gearbox is separated from the neutral gear, a preset CURVE1 table representing a fourth corresponding relation is checked through the real-time gradient of the vehicle to obtain a correction value 2 of the minimum charge;

step S10: determining a final set value of the minimum charge as a sum of the set value and the correction value 1 without disengaging the transmission gear from neutral;

step S11: determining the final set value of the minimum charge as the sum of the set value and the correction value 1 and 2 under the condition that the gear of the gearbox is out of neutral gear;

step S12: under the condition that the gear of the gearbox is not 0, obtaining a correction value 3 of the minimum charge through a preset CURVE2 table of a fifth corresponding relation of real-time gradient check representation of the vehicle, and determining a final set value of the minimum charge as the sum of the set value and the correction value 3;

step S13: the intake air amount of the engine is controlled based on the final setting value of the minimum charge.

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 engine air inflow, and the control device of the engine air inflow can be used for executing the control method for the engine air inflow provided by the embodiment of the application. 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 an engine intake air amount control apparatus provided in an embodiment of the present application.

Fig. 6 is a schematic diagram of a control device of an engine intake air amount according to an embodiment of the application. As shown in fig. 6, the apparatus includes:

a first obtaining unit 10, configured to obtain a first correspondence, where the first correspondence is a correspondence between a temperature of an engine, an idle setting value, and a torque setting value, where the temperature of the engine, the idle setting value, and the torque setting value are represented when leaving a factory, the idle setting value is an engine rotation speed value preset by a vehicle in an idle state, the idle state is a state in which the engine is operated in a neutral state, and the torque setting value is a torque setting value of the engine when the vehicle is in the idle state;

A first determining unit 20, configured to determine, during use of the engine after leaving the factory, that the torque set value corresponding to the temperature of the engine and the idle set value of the vehicle in the idle state in the first correspondence is a target idle torque according to the temperature of the engine of the vehicle in the idle state, the idle set value, and the first correspondence;

A first calculating unit 30 configured to calculate a difference between an actual idle torque and the target idle torque, and determine, according to the difference, the idle setting value, and a second correspondence, that a correction value of a minimum charge of the engine corresponding to the difference, which is the same as the difference and the idle setting value, and the idle setting value in the second correspondence is a first correction value;

A correction unit 40, configured to correct the setting value of the minimum charge at least according to the first correction value, so as to obtain a final setting value of the minimum charge;

A control unit 50 for controlling the engine intake air amount according to the final set value.

According to the embodiment, a first obtaining unit is used for obtaining a first corresponding relation representing the corresponding relation among the temperature of the engine when leaving the factory, the idle speed set value and the torque set value in the idle speed state; when the engine is in an idle state in the use process after leaving the factory, determining a temperature under the current working condition and a target idle torque corresponding to an idle setting value through a first determining unit according to a first corresponding relation; determining a difference value between the actual idle torque and the target idle torque under the current working condition and a correction value of the minimum charge of the engine corresponding to the idle setting value according to the second corresponding relation through a first computing unit; correcting the setting value of the lowest charge through a correction unit at least according to the correction value to obtain a final setting value; the engine intake air amount is controlled by the control unit at the determined final set value. The application considers the influence of aging of related components on the minimum charge along with the increase of the service time of the vehicle and the engine, and confirms the correction value of the minimum charge in idling according to the difference value of the target idling torque and the current actual idling torque, thereby adjusting the setting value of the minimum charge, effectively solving the problems that the setting value of the minimum charge in leaving factory cannot be used due to the change of the friction resistance of the engine and accessories after the engine is used for a period of time, the rotating speed of the engine cannot return to a normal idling value after the throttle is released, or the rotating speed of the engine is excessively high when the engine returns to idling from a high rotating speed after the throttle is released, and the like, and ensuring that the corrected minimum charge can meet the normal running of the engine.

The first correspondence may be stored in a table form in the nonvolatile memory, or may be stored in another form. According to some specific embodiments of the application, the first determining unit comprises: the first searching module is configured to search, in a first correspondence table, the torque set value corresponding to the temperature and the idle set value, which are the same as the temperature and the idle set value corresponding to the idle state, according to the temperature and the idle set value corresponding to the idle state, to obtain the target idle torque, where the first correspondence table includes a plurality of first arrays, and each first array includes: the temperature, the idle setting, and the torque setting. The target idle torque is determined through table lookup, so that the data processing speed is further increased, and the processing difficulty is simplified.

In addition to the manner, in other embodiments, the first determining unit includes: the first building module is used for building a first neural network representing the first corresponding relation, the first neural network is trained by machine learning through multiple groups of data, and each group of data in the multiple groups of data comprises: temperature, idle speed set point and torque set point; and the first input module is used for inputting the temperature and the idle speed set value corresponding to the idle speed state into the first neural network to obtain the target idle speed torque.

The second correspondence may be stored in the nonvolatile memory in a table form, or may be stored in another form. To further increase the data processing speed, in further exemplary embodiments, the first computing unit includes: and the second searching module is used for searching the correction value corresponding to the idle speed set value and the difference value which is the same as the difference value and the idle speed set value in a second corresponding relation table according to the difference value and the idle speed set value to obtain the first correction value, wherein the second corresponding relation table comprises a plurality of second groups, and each second group comprises the difference value, the idle speed set value and the correction value.

In addition to the manner, in other embodiments, the first computing unit includes: the second establishing module is configured to establish a second neural network that characterizes the second correspondence, where the second neural network is trained by machine learning using a plurality of sets of data, and each set of data in the plurality of sets of data includes: a difference between the actual idle torque and the target idle torque, an idle setting value and a torque setting value; and the second input module is used for inputting the difference value and the idle speed set value corresponding to the idle speed state into the second neural network to obtain the first correction value.

In an actual application process, the first computing unit includes: a first determination module for determining whether a transmission gear is 0; and the second determining module is used for determining that the difference value which is the same as the difference value and the idle speed set value in the second corresponding relation and the correction value of the minimum charge of the engine corresponding to the idle speed set value are the first correction value according to the difference value, the idle speed set value and the second corresponding relation when the gear of the gearbox is 0.

In an alternative, the apparatus further comprises: the establishing unit is used for establishing a third corresponding relation according to the temperature, the idle speed set point and the corresponding first correction value after determining that the correction value of the minimum charge of the engine corresponding to the idle speed set point and the difference value which is the same as the difference value and the idle speed set point in the second corresponding relation is a first correction value according to the difference value, the idle speed set point and the second corresponding relation, wherein the third corresponding relation is the corresponding relation between the first correction value of the engine, the temperature and the idle speed set point in the using process; a storing unit, configured to store the third correspondence into a nonvolatile memory when the vehicle is powered down; a second acquisition unit configured to acquire a current temperature and a current idle speed setting value of the engine in a case where the vehicle is powered on and in the idle speed state; and the calling unit is used for calling the third corresponding relation from the nonvolatile memory, and determining that the first correction value corresponding to the temperature and the idle speed set value, which are the same as the current temperature and the current idle speed set value, in the third corresponding relation is the current correction value of the engine according to the current temperature, the current idle speed set value and the third corresponding relation.

Specifically, the nonvolatile memory may be any suitable nonvolatile memory in a vehicle, such as an EEPROM or the like.

In the actual application process, the third correspondence may be stored in a table form in the nonvolatile memory, or may be stored in other forms. In order to further increase the data processing speed, in still another exemplary aspect, the calling unit includes: the third searching module is configured to search, according to the current temperature and the current idle setting value, for the first correction value corresponding to the temperature and the idle setting value that are the same as the current temperature and the current idle setting value from a third correspondence table, to obtain the current correction value, where the third correspondence table includes a plurality of third arrays, and each third array includes: the temperature, the idle setting, and the first correction value.

In addition to the manner, in other embodiments, the calling unit includes: the third establishing module is configured to establish a third neural network that characterizes the third correspondence, where the third neural network is trained by machine learning using a plurality of sets of data, and each set of data in the plurality of sets of data includes: a temperature of the engine, an idle setting, and a first correction to the minimum charge; and the third input module is used for inputting the current temperature and the current idle speed set value into the third neural network to obtain the current correction value.

In another alternative embodiment, the apparatus further comprises: a third obtaining unit, configured to obtain a current attitude angle of the vehicle, where the current attitude angle includes a current pitch angle and/or a current roll angle; a second determining unit configured to determine whether a transmission gear of the vehicle in the idle state is a neutral gear; a third determination unit configured to determine, in a case where the transmission gear in the idle state is the neutral gear and is changed from the neutral gear to a non-neutral gear, that is, in a case where the vehicle is in an idle start stage, a correction value of the minimum charge corresponding to an attitude angle identical to the current attitude angle in a fourth correspondence relation as a second correction value, based on the current attitude angle and the fourth correspondence relation; a fourth determination unit configured to determine, in a case where the transmission gear in the idle state is not the neutral gear, that is, in a case where the vehicle is in a gear stage, a correction value of the minimum charge corresponding to an attitude angle identical to the current attitude angle in a fifth correspondence relation as a third correction value, based on the current attitude angle and the fifth correspondence relation. In the application, besides considering the influence of aging of related components on the minimum charge along with the increase of the service time of the vehicle and the engine, the application also considers the difference of idle starting of the vehicle under different gradients and the requirement on the engine load in gear, determines the second correction value of the minimum charge corresponding to the current gradient according to the current attitude angle representing the gradient of the vehicle and the fourth corresponding relation in the idle starting stage, and determines the corresponding third correction according to the current attitude angle representing the gradient of the vehicle and the fifth corresponding relation in the gear stage, thereby further ensuring that the corrected minimum charge can meet the normal operation of the engine.

In order to further increase the data processing speed, specifically, the third determining unit includes: a fourth searching module, configured to search, according to the current attitude angle, a fourth correspondence table for a correction value of the minimum charge corresponding to the same attitude angle as the current attitude angle, to obtain the second correction value, where the fourth correspondence table includes a plurality of fourth arrays, and each fourth array includes: attitude angle and a second correction value.

In addition to the manner, in other embodiments, the third determining unit includes: a fourth establishing module, configured to establish a fourth neural network characterizing the fourth correspondence, where the fourth neural network is trained by machine learning using a plurality of sets of data, and each set of data in the plurality of sets of data includes: a second correction value for the attitude angle and the minimum charge of the vehicle; and the fourth input module is used for inputting the current attitude angle into the fourth neural network to obtain the second correction value.

To further ensure that the minimum charge meets the normal operating requirements of the engine, in one particular embodiment, the correction unit comprises one of: a first calculation module configured to calculate a sum of the first correction value, the second correction value, and the minimum charge setting value to obtain the final setting value; and the second calculation module is used for calculating the sum of the first correction value, the third correction value and the setting value of the minimum charge to obtain the final setting value.

In other embodiments, the apparatus further comprises: a second calculation unit configured to calculate a sum of the second correction value and the minimum charge setting value to obtain the final setting value when the transmission gear in the idle state is the neutral gear and is changed from the neutral gear to a non-neutral gear; and a third calculation unit configured to calculate a sum of the third correction value and the minimum charge setting value to obtain the final setting value, when the transmission gear in the idle state is not the neutral state.

In addition, the correction unit includes: and a third calculation module for calculating the sum of the first correction value and the minimum charge set value to obtain the final set value when the vehicle is in an idle state.

The control device of the engine air inflow comprises a processor and a memory, wherein the first acquisition unit, the first determination unit, the first calculation unit, the correction unit, the control 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 inner core can be provided with one or more than one, and the problem that the preset value of the minimum charge in the prior art cannot meet the normal operation of the engine is at least solved by adjusting the parameters of the inner core.

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 arranged is controlled to execute a control method of the engine air inflow.

The embodiment of the invention provides a processor for running a program, wherein the program runs to execute the control method of the engine air inflow.

The embodiment of the invention provides equipment, which comprises a processor, a memory and a program stored in 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 application also provides a computer program product adapted to perform, when executed on a data processing device, a program initialized with at least the following method steps:

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 of the present application achieve the following technical effects:

in the control method of the engine air inflow, a first corresponding relation representing the corresponding relation among the temperature of an engine when leaving a factory, an idle speed set value and a torque set value in an idle speed state is obtained; then, when the engine is in an idle state in the use process after leaving the factory, determining a temperature under the current working condition and a target idle torque corresponding to an idle setting value according to a first corresponding relation; then, according to the second corresponding relation, determining a difference value between the actual idle torque and the target idle torque under the current working condition and a correction value of the minimum charge of the engine corresponding to the idle setting value; correcting the setting value of the lowest charge at least according to the correction value to obtain a final setting value; finally, the engine intake air amount is controlled at the determined final set value. The application considers the influence of aging of related components on the minimum charge along with the increase of the service time of the vehicle and the engine, and confirms the correction value of the minimum charge in idling according to the difference value of the target idling torque and the current actual idling torque, thereby adjusting the setting value of the minimum charge, effectively solving the problems that the setting value of the minimum charge in leaving factory cannot be used due to the change of the friction resistance of the engine and accessories after the engine is used for a period of time, the rotating speed of the engine cannot return to a normal idling value after the throttle is released, or the rotating speed of the engine is excessively high when the engine returns to idling from a high rotating speed after the throttle is released, and the like, and ensuring that the corrected minimum charge can meet the normal running of the engine.

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

Claims

1. A control method of an intake air amount of an engine, characterized by comprising:

acquiring a first corresponding relation, wherein the first corresponding relation is a corresponding relation among a temperature, an idle speed set value and a torque set value of an engine when the engine is characterized in delivery, the idle speed set value is an engine rotating speed value preset by a vehicle in an idle state, the idle state is a state that the engine is operated under a neutral gear condition, and the torque set value is a torque set value of the engine when the vehicle is in the idle state;

in the use process of the engine after leaving the factory, determining the torque set value corresponding to the temperature of the engine and the idle set value in the idle state of the vehicle in the first corresponding relation as a target idle torque according to the temperature of the engine in the idle state of the vehicle and the corresponding relation between the idle set value and the first corresponding relation;

Calculating a difference value between an actual idle torque and the target idle torque, and determining a correction value of the minimum charge of the engine corresponding to the idle setting value and the difference value which is the same as the difference value and the idle setting value in a second corresponding relation as a first correction value according to the difference value, the idle setting value and the second corresponding relation;

correcting the setting value of the minimum charge according to at least the first correction value to obtain a final setting value of the minimum charge;

and controlling the air inflow of the engine according to the final set value.

2. The method according to claim 1, wherein after determining, from the difference value, the idle setting value, and a second correspondence relation, that a correction value of a minimum charge of the engine corresponding to the idle setting value and the difference value identical to the difference value and the idle setting value in the second correspondence relation is a first correction value, the method further comprises:

establishing a third corresponding relation according to the temperature, the idle speed set value and the corresponding first correction value, wherein the third corresponding relation is a corresponding relation between the first correction value of the engine, the temperature and the idle speed set value in the representation of the use process;

Under the condition that the vehicle is powered down, storing the third corresponding relation into a nonvolatile memory;

under the condition that the vehicle is electrified and in the idle state, acquiring the current temperature and the current idle speed set value of the engine;

and calling the third corresponding relation from the nonvolatile memory, and determining that the first correction value corresponding to the temperature and the idle speed set value, which are the same as the current temperature and the current idle speed set value, in the third corresponding relation is the current correction value of the engine according to the current temperature, the current idle speed set value and the third corresponding relation.

3. The method of claim 2, wherein determining, from the current temperature, the current idle setting, and the third correspondence, the first correction value corresponding to the same temperature and idle setting as the current temperature and idle setting in the third correspondence as a current correction value of the engine includes:

according to the current temperature and the current idle speed set value, searching the first correction value corresponding to the temperature and the idle speed set value which are the same as the current temperature and the current idle speed set value from a third corresponding relation table to obtain the current correction value, wherein the third corresponding relation table comprises a plurality of third arrays, and each third array comprises: the temperature, the idle setting, and the first correction value.

4. The method according to claim 1, wherein the method further comprises:

acquiring a current attitude angle of the vehicle, wherein the current attitude angle comprises a current pitch angle and/or a current roll angle;

determining whether a transmission gear of the vehicle in the idle state is a neutral gear;

when the transmission gear in the idle state is the neutral gear and is changed from the neutral gear to a non-neutral gear, determining, from the current attitude angle and a fourth correspondence, that a correction value of the minimum charge corresponding to an attitude angle identical to the current attitude angle in the fourth correspondence is a second correction value;

and when the transmission gear in the idle state is not the neutral gear, determining that the correction value of the minimum charge corresponding to the same attitude angle as the current attitude angle in a fifth corresponding relation is a third correction value according to the current attitude angle and the fifth corresponding relation.

5. The method of claim 4, wherein correcting the minimum charge set point based on at least the first correction value results in a minimum charge final set point comprising one of:

Calculating a sum of the first correction value, the second correction value, and the minimum charge setting value to obtain the final setting value;

and calculating the sum of the first correction value, the third correction value and the setting value of the minimum charge to obtain the final setting value.

6. The method according to claim 4, wherein the method further comprises:

calculating a sum of the second correction value and the minimum charge set value to obtain the final set value when the transmission gear in the idle state is the neutral gear and is changed from the neutral gear to a non-neutral gear;

and calculating the sum of the third correction value and the minimum charge set value to obtain the final set value when the transmission gear in the idle state is not the neutral gear.

7. The method according to any one of claim 1 to 6, wherein,

determining, according to the temperature of the engine of the vehicle in the idle state and the first correspondence between the idle setting value and the idle setting value, the torque setting value corresponding to the temperature of the engine of the vehicle in the idle state and the idle setting value in the first correspondence as a target idle torque, including:

According to the temperature and the idle speed set value corresponding to the idle speed state, searching the torque set value corresponding to the idle speed set value and the temperature which is the same as the temperature and the idle speed set value corresponding to the idle speed state in a first corresponding relation table to obtain the target idle speed torque, wherein the first corresponding relation table comprises a plurality of first arrays, and each first array comprises: the temperature, the idle setting, and the torque setting;

according to the difference value, the idle speed set value and a second corresponding relation, determining that a correction value of the minimum charge of the engine corresponding to the difference value and the idle speed set value, which are the same as the difference value and the idle speed set value, in the second corresponding relation is a first correction value, including: and searching the correction value corresponding to the idle speed set value and the difference value which is the same as the difference value and the idle speed set value in a second corresponding relation table according to the difference value and the idle speed set value to obtain the first correction value, wherein the second corresponding relation table comprises a plurality of second groups, and each second group comprises the difference value, the idle speed set value and the correction value.

8. A method according to any one of claims 1 to 6, wherein modifying the set point of the minimum charge to obtain the final set point of the minimum charge based at least on the first modification value comprises:

and calculating the sum of the first correction value and the setting value of the minimum charge to obtain the final setting value.

9. An engine intake air amount control device, characterized by comprising:

the first obtaining unit is used for obtaining a first corresponding relation, wherein the first corresponding relation is a corresponding relation among a temperature, an idle speed set value and a torque set value of an engine when the engine is characterized in delivery, the idle speed set value is an engine rotating speed value preset by a vehicle in an idle state, the idle state is a state that the engine is operated under a neutral gear condition, and the torque set value is a torque set value of the engine when the vehicle is in the idle state;

a first determining unit, configured to determine, during use of the engine after leaving the factory, that the torque set value corresponding to the temperature of the engine and the idle set value of the vehicle in the idle state in the first corresponding relationship is a target idle torque according to the temperature of the engine of the vehicle in the idle state and the idle set value and the first corresponding relationship;

A first calculating unit, configured to calculate a difference between an actual idle torque and the target idle torque, and determine, according to the difference, the idle setting value, and a second correspondence, that a correction value of a minimum charge of the engine corresponding to the difference, which is the same as the difference and the idle setting value, and the idle setting value in the second correspondence is a first correction value;

a correction unit, configured to correct the setting value of the minimum charge according to at least the first correction value, to obtain a final setting value of the minimum charge;

and the control unit is used for controlling the air inflow of the engine according to the final set value.

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 1-8.