Control method and system for fixed cylinder deactivation of engine, electronic control unit and vehicle

Abstract

The invention provides a control method and system for fixed cylinder deactivation of an engine, an electronic control unit and a vehicle, and the method comprises the steps: obtaining vehicle state information during operation of a target vehicle, including engine oil temperature, vehicle working mode and gear shifting state information; according to the engine oil temperature, the vehicle working mode and the gear shifting state information, whether a fixed cylinder deactivation preset condition is met or not is judged; if the fixed cylinder deactivation preset condition is met, engine state information, including the engine rotating speed and the target torque, during operation of the target vehicle is obtained; according to the engine rotating speed, the target torque and a preset cylinder deactivation map, a fixed cylinder deactivation working mode is obtained; wherein the fixed cylinder deactivation working mode is a symmetrically arranged fixed cylinder deactivation working mode; the cylinder deactivation work is carried out according to the cylinder deactivation number and the cylinder deactivation sequence in the fixed cylinder deactivation working mode, the working cylinder is controlled according to the control pulse parameter corresponding to the fixed cylinder deactivation working mode, the cost can be reduced, and the performance of noise, vibration and sound vibration roughness can be improved.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to a control method, system, electronic control unit and vehicle for fixed cylinder deactivation of an engine. Background Art

[0002] At present, environmental problems and energy crises are becoming increasingly severe. Vehicles play an important role in energy consumption and exhaust pollution, and it is extremely urgent to solve the problem of vehicle energy conservation and emission reduction. Cylinder deactivation technology can be used to enable relevant mechanisms to cut off the fuel supply and intake and exhaust of some cylinders, stop their work, and increase the load rate of the remaining working cylinders to improve efficiency and reduce fuel consumption.

[0003] Currently, existing technologies use dynamic cylinder deactivation technology to make cylinder deactivation decisions for engine cylinders.

[0004] However, due to the complex structure and control logic of dynamic cylinder deactivation, the cost is greatly increased, accompanied by the deterioration of noise, vibration and harshness. Summary of the invention

[0005] The embodiments of the present application provide a control method, system, electronic control unit and vehicle for fixed cylinder deactivation of an engine, so as to reduce costs and improve the performance of noise, vibration and acoustic harshness.

[0006] In a first aspect, an embodiment of the present application provides a control method for fixed cylinder deactivation of an engine, comprising: obtaining vehicle status information when a target vehicle is running; wherein the vehicle status information includes engine oil temperature, vehicle operating mode and gear shifting status information; judging whether a preset condition for fixed cylinder deactivation is satisfied based on the engine oil temperature, vehicle operating mode and gear shifting status information; if it is determined that the preset condition for fixed cylinder deactivation is satisfied, obtaining engine status information when the target vehicle is running; wherein the engine status information includes engine speed and target torque; obtaining a fixed cylinder deactivation working mode based on the engine speed, target torque and a preset cylinder deactivation map; wherein the fixed cylinder deactivation working mode is a symmetrically arranged fixed cylinder deactivation working mode; performing cylinder deactivation according to the number of cylinder deactivation and the cylinder deactivation sequence in the fixed cylinder deactivation working mode, and controlling the working cylinder according to the control pulse parameters corresponding to the fixed cylinder deactivation working mode.

[0007] In one possible implementation, based on the engine oil temperature, the vehicle operating mode and the shift status information, it is determined whether the fixed cylinder deactivation preset condition is met, including: determining whether the engine oil temperature is greater than the engine oil temperature preset value; determining whether the vehicle operating mode is consistent with the vehicle operating mode preset value; determining whether the shift status information is consistent with the shift status information preset value; if it is determined that the engine oil temperature is greater than the engine oil temperature preset value, the vehicle operating mode is consistent with the vehicle operating mode preset value, and the shift status information is consistent with the shift status information preset value, then it is determined that the fixed cylinder deactivation preset condition is met.

[0008] In one possible implementation, the vehicle operating mode preset values ​​include: normal mode, thermal management mode, two-cylinder stop working mode, four-cylinder stop working mode and six-cylinder stop working mode; accordingly, judging whether the vehicle operating mode is consistent with the vehicle operating mode preset values ​​includes: if the vehicle operating mode is normal mode, thermal management mode, two-cylinder stop working mode, four-cylinder stop working mode and six-cylinder stop working mode, then judging that the vehicle operating mode is consistent with the vehicle operating mode preset values.

[0009] In one possible implementation, a fixed cylinder deactivation operating mode is obtained based on the engine speed, target torque and a preset cylinder deactivation map, including: obtaining the correspondence between the engine speed and the target torque; obtaining the number of cylinders hit in the preset cylinder deactivation map, and determining the fixed cylinder deactivation operating mode based on the number of cylinders hit.

[0010] In a possible implementation, cylinder deactivation is performed according to the cylinder deactivation number and cylinder deactivation sequence in a fixed cylinder deactivation mode, including: stopping fuel injection to the deactivated cylinders and closing the intake valves and exhaust valves of the deactivated cylinders according to the cylinder deactivation number and cylinder deactivation sequence.

[0011] In a possible implementation manner, after determining whether the fixed cylinder deactivation preset condition is satisfied, the method further includes: if it is determined that the fixed cylinder deactivation preset condition is not satisfied, reacquiring vehicle state information when the target vehicle is running.

[0012] In a second aspect, an embodiment of the present application provides a control system for a fixed cylinder deactivation of an engine, comprising:

[0013] A vehicle status information acquisition unit is used to acquire vehicle status information of the target vehicle when it is running; wherein the vehicle status information includes engine oil temperature, vehicle operating mode and shift status information;

[0014] A judgment unit, used to judge whether a fixed cylinder deactivation preset condition is met according to engine oil temperature, vehicle working mode and shift status information;

[0015] An engine state information acquisition unit, for acquiring engine state information when the target vehicle is running if it is determined that the fixed cylinder deactivation preset condition is met; wherein the engine state information includes engine speed and target torque;

[0016] A fixed cylinder deactivation working mode acquisition unit is used to acquire a fixed cylinder deactivation working mode according to the engine speed, the target torque and a preset cylinder deactivation map; wherein the fixed cylinder deactivation working mode is a symmetrically arranged fixed cylinder deactivation working mode;

[0017] The control unit is used to perform cylinder deactivation according to the cylinder deactivation number and cylinder deactivation sequence in the fixed cylinder deactivation working mode, and to control the working cylinder according to the control pulse parameters corresponding to the fixed cylinder deactivation working mode.

[0018] In a third aspect, an embodiment of the present application provides an electronic control unit, including: a memory, a processor;

[0019] The memory stores computer-executable instructions;

[0020] The processor executes the computer-executable instructions stored in the memory, so that the processor executes the above first aspect and / or various possible implementations of the first aspect.

[0021] In a fourth aspect, an embodiment of the present application provides a vehicle, comprising: a control system for a fixed cylinder deactivation of an engine, wherein the control system for a fixed cylinder deactivation of an engine is used to execute the first aspect above and / or various possible implementations of the first aspect.

[0022] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the first aspect above and / or various possible implementations of the first aspect.

[0023] In a sixth aspect, an embodiment of the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the above first aspect and / or various possible implementation methods of the first aspect.

[0024] The control method, system, electronic control unit and vehicle of the engine fixed cylinder deactivation provided by the embodiment of the present application obtain the vehicle state information when the target vehicle is running, wherein the vehicle state information includes the engine oil temperature, the vehicle working mode and the shifting state information. It is judged whether the preset conditions of the fixed cylinder deactivation are met according to the engine oil temperature, the vehicle working mode and the shifting state information; if met, the engine state information when the target vehicle is running is obtained, wherein the engine state information includes the engine speed and the target torque. According to the engine speed, the target torque and the preset cylinder deactivation map, the fixed cylinder deactivation working mode is obtained; the cylinder deactivation work is performed according to the cylinder deactivation number and cylinder deactivation sequence in the fixed cylinder deactivation working mode, and the working cylinder is controlled according to the control pulse parameters corresponding to the fixed cylinder deactivation working mode. The fixed cylinder deactivation has a simpler structure and clearer control logic, and can improve fuel economy at a low cost; the symmetrically arranged fixed cylinder deactivation working mode can improve the performance of noise, vibration and acoustic roughness. In addition, each fixed cylinder deactivation working mode has a complete control pulse, and the working cylinder is controlled according to the control pulse parameters corresponding to the fixed cylinder deactivation working mode to avoid performance deviation caused by the consistency of each cylinder. In addition, in the process of judging whether the preset conditions for fixed cylinder deactivation are met, the judgment is made through the engine oil temperature, vehicle operating mode and shift status information. On the one hand, the engine oil temperature information is directly obtained to avoid errors caused by inferring the oil temperature through other information such as water temperature; on the other hand, it avoids calling cylinder deactivation in special scenarios such as regeneration mode and braking mode, which affects normal functions; on the other hand, it avoids problems affecting normal vehicle driving due to slow torque response. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0026] Figure 1 A schematic diagram of a scenario of a method for controlling a fixed cylinder deactivation of an engine provided in an embodiment of the present application;

[0027] Figure 2 A schematic flow chart of a method for controlling a fixed cylinder deactivation of an engine provided in an embodiment of the present application;

[0028] Figure 3 A schematic diagram of a preset cylinder deactivation map provided in an embodiment of the present application;

[0029] Figure 4 A schematic diagram of a fixed cylinder deactivation working mode provided in an embodiment of the present application;

[0030] Figure 5 A schematic diagram of the structure of a control system for a fixed cylinder deactivation of an engine provided in an embodiment of the present application;

[0031] Figure 6A schematic diagram of the structure of an electronic control unit provided in an embodiment of the present application.

[0032] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0033] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0034] Figure 1 A schematic diagram of a scene of a method for controlling a fixed cylinder deactivation of an engine provided in an embodiment of the present application, such as Figure 1 As shown, the method of the present application can be applied to any vehicle, and the vehicle includes an electronic control unit, which is used to obtain vehicle status information when the vehicle is running, including engine oil temperature, vehicle operating mode and shift status information; and determine whether the fixed cylinder deactivation preset conditions are met based on the engine oil temperature, vehicle operating mode and shift status information, and if so, obtain the engine status information when the vehicle is running, including engine speed and target torque; obtain the fixed cylinder deactivation working mode based on the engine speed, target torque and a preset cylinder deactivation map; perform cylinder deactivation according to the number of deactivated cylinders and the cylinder deactivation sequence in the fixed cylinder deactivation working mode, and control the working cylinder according to the control pulse parameters corresponding to the fixed cylinder deactivation working mode.

[0035] At present, environmental problems and energy crises are becoming increasingly severe. Vehicles occupy an important position in energy consumption and exhaust pollution. It is extremely urgent to solve the problem of energy conservation and emission reduction of vehicles. Through cylinder deactivation technology, the relevant mechanism can cut off the fuel supply and intake and exhaust of some cylinders, stop their work, and increase the load rate of the remaining working cylinders to improve efficiency and reduce fuel consumption. At present, the existing technology makes cylinder deactivation decisions for engine cylinders through dynamic cylinder deactivation technology. However, due to the complex structure and control logic of dynamic cylinder deactivation, the cost is greatly increased, accompanied by the deterioration of noise, vibration and acoustic roughness.

[0036] In order to solve the above technical problems, the present application proposes the following technical ideas: Considering the complex structure and control logic of dynamic cylinder deactivation, the cost is greatly increased, and the noise, vibration and acoustic roughness are deteriorated. The inventor thought of using a symmetrically arranged fixed cylinder deactivation working mode, performing cylinder deactivation according to the number of cylinder deactivation and cylinder deactivation sequence in the fixed cylinder deactivation working mode, and controlling the working cylinder according to the control pulse parameters corresponding to the fixed cylinder deactivation working mode. First, according to the vehicle state information of the target vehicle during operation, including the engine oil temperature, the vehicle working mode and the shifting state information, it is judged whether the fixed cylinder deactivation preset conditions are met to avoid the problem that the cylinder deactivation affects the vehicle driving and fails to meet the functional requirements. If it is determined that the fixed cylinder deactivation preset conditions are met, the engine state information of the target vehicle during operation, including the engine speed and the target torque, is obtained; according to the engine speed, the target torque and the preset cylinder deactivation map, the fixed cylinder deactivation working mode is obtained; wherein the fixed cylinder deactivation working mode is a symmetrically arranged fixed cylinder deactivation working mode; the symmetrically arranged fixed cylinder deactivation working mode not only meets the functional requirements of increasing exhaust temperature and reducing fuel consumption, but also ensures the performance of noise, vibration and acoustic roughness. The cylinder deactivation is performed according to the cylinder deactivation number and cylinder deactivation sequence in the fixed cylinder deactivation working mode, and the working cylinder is controlled according to the control pulse parameters corresponding to the fixed cylinder deactivation working mode. Each fixed cylinder deactivation working mode has control pulse parameters to avoid performance deviation caused by the consistency of each cylinder. The method of the present application can improve fuel economy at a low cost and improve the performance of noise, vibration and harshness.

[0037] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0038] Figure 2 A flow chart of a method for controlling a fixed cylinder deactivation of an engine provided in an embodiment of the present application is shown in FIG. Figure 2 As shown, the method includes:

[0039] S201: Acquire vehicle status information of the target vehicle during operation; wherein the vehicle status information includes engine oil temperature, vehicle operating mode and shift status information.

[0040] Among them, the engine oil temperature is the current engine oil temperature when the target vehicle is running; the vehicle operating mode is the current vehicle operating mode when the target vehicle is running; and the gear shifting state information is the current gear shifting state information when the target vehicle is running.

[0041] In this embodiment, the engine oil temperature affects the normal operation of the cylinder deactivation mechanism hardware; the vehicle operation modes include normal mode, braking mode, regeneration mode, thermal management mode, two-cylinder deactivation operation mode, four-cylinder deactivation operation mode, and six-cylinder deactivation operation mode. In the braking mode and regeneration mode, it indicates that the driver has special functional requirements for the vehicle, and cylinder deactivation cannot be enabled in these operation modes, otherwise it will cause functional abnormality; the cylinder deactivation function torque response hysteresis affects the shifting process, thereby affecting the normal driving of the vehicle.

[0042] S202: Determine whether a fixed cylinder deactivation preset condition is met based on the engine oil temperature, the vehicle operating mode and the shift status information.

[0043] Specifically, step S202 includes S2021 to S2024:

[0044] S2021: Determine whether the engine oil temperature is greater than a preset engine oil temperature value.

[0045] S2022: Determine whether the vehicle operating mode is consistent with a preset value of the vehicle operating mode.

[0046] Among them, the preset values ​​of the vehicle working mode include: normal mode, thermal management mode, two-cylinder stop working mode, four-cylinder stop working mode and six-cylinder stop working mode.

[0047] Specifically, if the vehicle operating mode is a normal mode, a thermal management mode, a two-cylinder stop operating mode, a four-cylinder stop operating mode, or a six-cylinder stop operating mode, it is determined that the vehicle operating mode is consistent with a preset vehicle operating mode value.

[0048] S2023: Determine whether the gear shift status information is consistent with a preset gear shift status information value.

[0049] S2024: If it is determined that the engine oil temperature is greater than the preset engine oil temperature value, the vehicle operating mode is consistent with the preset vehicle operating mode value, and the shift state information is consistent with the preset shift state information value, then it is determined that the fixed cylinder deactivation preset condition is met.

[0050] In this embodiment, when the engine oil temperature, vehicle operating mode and shift status information meet the fixed cylinder deactivation preset conditions, the cylinder deactivation mechanism can work normally; when the vehicle is in the preset operating mode, cylinder deactivation will not cause abnormalities in operating modes such as regeneration mode and braking mode; when the vehicle is not in a shift state, cylinder deactivation will not cause a slow torque response, affecting normal driving of the vehicle.

[0051] S203: If it is determined that the fixed cylinder deactivation preset condition is met, then the engine state information of the target vehicle when it is running is obtained; wherein the engine state information includes the engine speed and the target torque.

[0052] S204: acquiring a fixed cylinder deactivation working mode according to the engine speed, the target torque and a preset cylinder deactivation map; wherein the fixed cylinder deactivation working mode is a symmetrically arranged fixed cylinder deactivation working mode.

[0053] Specifically, the corresponding relationship between the engine speed and the target torque is obtained; the number of cylinders hit in the corresponding relationship in a preset cylinder deactivation map is obtained, and the fixed cylinder deactivation working mode is determined according to the number of cylinders hit.

[0054] Specifically, Figure 3 This is a schematic diagram of a preset cylinder deactivation map provided in an embodiment of the present application. Figure 3 As shown, the horizontal axis is the target torque and the vertical axis is the engine speed. The data blocks in the figure represent the number of working cylinders, such as 2, 4 and 6 represent the two-cylinder stop working mode, the four-cylinder stop working mode and the six-cylinder stop working mode, respectively, where each data block is a corresponding relationship between the engine speed and the target torque.

[0055] The fixed cylinder deactivation modes include: two-cylinder deactivation mode, four-cylinder deactivation mode and six-cylinder deactivation mode. Each cylinder deactivation mode has complete engine control pulses. Figure 4 This is a schematic diagram of the fixed cylinder stop working mode provided in the embodiment of the present application. Figure 4 As shown, when the fixed cylinder deactivation working mode is the two-cylinder deactivation working mode, one of the three cylinder deactivation combinations of 1 / 6 cylinders, 2 / 5 cylinders or 3 / 4 cylinders is selected to execute the cylinder deactivation operation, and this combination is used each time the two-cylinder deactivation working mode is entered; when the fixed cylinder deactivation working mode is the four-cylinder deactivation working mode, one of the three cylinder deactivation combinations of 1 / 2 / 5 / 6 cylinders, 1 / 3 / 4 / 6 cylinders and 2 / 3 / 4 / 5 cylinders is selected to execute the cylinder deactivation operation, and this combination is used each time the four-cylinder deactivation working mode is entered; when the fixed cylinder deactivation working mode is the six-cylinder deactivation working mode, 1 / 2 / 3 / 4 / 5 / 6 cylinders all execute the cylinder deactivation operation.

[0056] In this embodiment, the two-cylinder stop working mode, the four-cylinder stop working mode and the six-cylinder stop working mode are all symmetrically arranged fixed cylinder stop working modes.

[0057] Optionally, if it is not necessary to enter the fixed cylinder shutdown working mode, the full cylinder working mode is entered.

[0058] S205: Perform cylinder deactivation according to the cylinder deactivation number and cylinder deactivation sequence in the fixed cylinder deactivation working mode, and control the working cylinder according to the control pulse parameters corresponding to the fixed cylinder deactivation working mode.

[0059] Specifically, according to the deactivated cylinder number and the deactivated cylinder sequence, fuel injection to the deactivated cylinders is stopped, and the intake valves and exhaust valves of the deactivated cylinders are closed.

[0060] In this embodiment, cylinder deactivation is performed according to the number of deactivated cylinders and the deactivation sequence, fuel injection to the deactivated cylinders is stopped, and the intake valves and exhaust valves of the deactivated cylinders are closed; the working cylinders are controlled according to the control parameters of the engine corresponding to the fixed cylinder deactivation working mode to ensure that the engine output torque remains unchanged.

[0061] In summary, the vehicle status information of the target vehicle when it is running is obtained, wherein the vehicle status information includes the engine oil temperature, the vehicle working mode and the shifting status information. According to the engine oil temperature, the vehicle working mode and the shifting status information, it is judged whether the preset conditions of the fixed cylinder deactivation are met; if they are met, the engine status information of the target vehicle when it is running is obtained, wherein the engine status information includes the engine speed and the target torque. According to the engine speed, the target torque and the preset cylinder deactivation map, the fixed cylinder deactivation working mode is obtained; the cylinder deactivation work is performed according to the cylinder deactivation number and cylinder deactivation sequence in the fixed cylinder deactivation working mode, and the working cylinder is controlled according to the control pulse parameters corresponding to the fixed cylinder deactivation working mode. The fixed cylinder deactivation has a simpler structure and clearer control logic, and can improve fuel economy at a low cost; the symmetrically arranged fixed cylinder deactivation working mode can improve the performance of noise, vibration and acoustic roughness. In addition, each fixed cylinder deactivation working mode has a complete control pulse, and the working cylinder is controlled according to the control pulse parameters corresponding to the fixed cylinder deactivation working mode to avoid performance deviation caused by the consistency of each cylinder. In addition, in the process of judging whether the preset conditions for fixed cylinder deactivation are met, the judgment is made through the engine oil temperature, vehicle operating mode and shift status information. On the one hand, the engine oil temperature information is directly obtained to avoid errors caused by inferring the oil temperature through other information such as water temperature; on the other hand, it avoids calling cylinder deactivation in special scenarios such as regeneration mode and braking mode, which affects normal functions; on the other hand, it avoids problems affecting normal vehicle driving due to slow torque response.

[0062] On the basis of the above-mentioned embodiment, in this embodiment, the situation that the preset condition of fixed cylinder deactivation is not met is introduced, and the details are as follows:

[0063] If it is determined that the fixed cylinder deactivation preset condition is not satisfied, the vehicle state information of the target vehicle during operation is re-acquired.

[0064] Specifically, if it is determined that the fixed cylinder deactivation preset condition is not met, the process returns to reacquire the vehicle state information of the target vehicle during operation until the fixed cylinder deactivation preset condition is met.

[0065] In summary, if the preset conditions for fixed cylinder deactivation are not met, the vehicle status information of the target vehicle during operation is obtained, and it can be determined whether the fixed cylinder deactivation working mode can be entered according to the real-time status of the vehicle to avoid the problem of affecting vehicle driving after cylinder deactivation and failing to meet functional requirements.

[0066] Figure 5This is a schematic diagram of the structure of the control system for the engine fixed cylinder deactivation provided in the embodiment of the present application. Figure 5 As shown, the control system of the engine fixed cylinder deactivation includes: a vehicle state information acquisition unit 501, a judgment unit 502, an engine state information acquisition unit 503, a fixed cylinder deactivation working mode acquisition unit 504 and a control unit 505.

[0067] The vehicle status information acquisition unit 501 is used to acquire the vehicle status information of the target vehicle when it is running; wherein the vehicle status information includes engine oil temperature, vehicle working mode and shift status information;

[0068] A judgment unit 502, used to judge whether a fixed cylinder deactivation preset condition is met according to the engine oil temperature, the vehicle working mode and the shift state information;

[0069] The engine state information acquisition unit 503 is used to acquire the engine state information of the target vehicle when it is running if it is determined that the fixed cylinder deactivation preset condition is met; wherein the engine state information includes the engine speed and the target torque;

[0070] The fixed cylinder deactivation working mode acquisition unit 504 is used to acquire the fixed cylinder deactivation working mode according to the engine speed, the target torque and the preset cylinder deactivation map; wherein the fixed cylinder deactivation working mode is a symmetrically arranged fixed cylinder deactivation working mode;

[0071] The control unit 505 is used to perform cylinder deactivation according to the cylinder deactivation number and cylinder deactivation sequence in the fixed cylinder deactivation working mode, and control the working cylinder according to the control pulse parameters corresponding to the fixed cylinder deactivation working mode.

[0072] In a possible implementation, the judgment unit 502 includes: an engine oil temperature judgment unit, a vehicle working mode judgment unit, a shift state information judgment unit and a judgment unit. The engine oil temperature judgment unit is used to judge whether the engine oil temperature is greater than the preset value of the engine oil temperature; the vehicle working mode judgment unit is used to judge whether the vehicle working mode is consistent with the preset value of the vehicle working mode; the shift state information judgment unit is used to judge whether the shift state information is consistent with the preset value of the shift state information; the judgment unit is used to judge whether the fixed cylinder deactivation preset condition is met if it is determined that the engine oil temperature is greater than the preset value of the engine oil temperature, the vehicle working mode is consistent with the preset value of the vehicle working mode, and the shift state information is consistent with the preset value of the shift state information.

[0073] In one possible implementation, the vehicle operating mode preset values ​​include: normal mode, thermal management mode, two-cylinder stop working mode, four-cylinder stop working mode and six-cylinder stop working mode; accordingly, the vehicle operating mode judgment unit is specifically used to determine that the vehicle operating mode is consistent with the vehicle operating mode preset values ​​if the vehicle operating mode is the normal mode, thermal management mode, two-cylinder stop working mode, four-cylinder stop working mode and six-cylinder stop working mode.

[0074] In a possible implementation, the fixed cylinder deactivation working mode acquisition unit 504 is specifically used to obtain the corresponding relationship between the engine speed and the target torque; obtain the number of cylinders hit in the corresponding relationship in a preset cylinder deactivation map, and determine the fixed cylinder deactivation working mode according to the number of cylinders hit.

[0075] In a possible implementation manner, the control unit 505 is specifically configured to stop injecting fuel to the deactivated cylinders and close the intake valves and exhaust valves of the deactivated cylinders according to the deactivated cylinder number and the deactivated cylinder sequence.

[0076] In a possible implementation manner, the control system for fixed cylinder deactivation of the engine further includes: a vehicle state information re-acquisition unit, configured to re-acquire vehicle state information of the target vehicle when the target vehicle is running if it is determined that the preset condition for fixed cylinder deactivation is not met.

[0077] The engine fixed cylinder deactivation control system provided in this embodiment can execute the method provided in the above method embodiment, and its implementation principle and technical effect are similar, so this embodiment will not be described in detail here.

[0078] Figure 6 This is a schematic diagram of the structure of the electronic control unit provided in the embodiment of the present application. Figure 6 As shown, the electronic control unit provided in this embodiment includes: at least one processor 601 and a memory 602. Optionally, the electronic control unit also includes a communication component 603. The processor 601, the memory 602 and the communication component 603 are connected via a bus 604.

[0079] In a specific implementation process, at least one processor 601 executes the computer execution instructions stored in the memory 602, so that at least one processor 601 executes the above method.

[0080] The specific implementation process of the processor 601 can be found in the above method embodiment, and its implementation principle and technical effect are similar, so this embodiment will not be repeated here.

[0081] In the above embodiments, it should be understood that the processor can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. A general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the invention can be directly implemented as a hardware processor, or can be implemented by a combination of hardware and software modules in the processor.

[0082] The memory may include a high-speed memory (Random Access Memory, RAM), and may also include a non-volatile memory (NVM), such as at least one disk storage.

[0083] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the bus in the drawings of this application is not limited to only one bus or one type of bus.

[0084] The present application also provides a vehicle, including a control system for fixed cylinder deactivation of an engine, which can execute the method provided in the above method embodiment.

[0085] The present application also provides a computer program product, including a computer program, which implements the above method when executed by a processor.

[0086] The present application also provides a computer-readable storage medium, in which computer-executable instructions are stored. When a processor executes the computer-executable instructions, the above method is implemented.

[0087] The above-mentioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. The readable storage medium can be any available medium that can be accessed by a general or special-purpose computer.

[0088] An exemplary readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (Application Specific Integrated Circuits, referred to as: ASIC). Of course, the processor and the readable storage medium can also exist in the device as discrete components.

[0089] The division of units is only a logical function division, and there may be other divisions in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other forms.

[0090] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0091] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0092] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0093] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0094] Finally, it should be noted that those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art not disclosed by the present invention, are not limited to the precise structure described above and shown in the drawings, and may be modified and changed in various ways without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A method for controlling a fixed cylinder deactivation of an engine, characterized in that: Applications in electronic control units, including: Acquire vehicle status information of the target vehicle when it is running; wherein the vehicle status information includes engine oil temperature, vehicle operating mode and shift status information; determining whether a fixed cylinder deactivation preset condition is met according to the engine oil temperature, the vehicle operating mode and the shift state information; If it is determined that the fixed cylinder deactivation preset condition is met, then obtaining the engine state information of the target vehicle when it is running; wherein the engine state information includes the engine speed and the target torque; According to the engine speed, the target torque and a preset cylinder deactivation map, a fixed cylinder deactivation working mode is acquired; wherein the fixed cylinder deactivation working mode is a symmetrically arranged fixed cylinder deactivation working mode; The cylinder deactivation operation is performed according to the cylinder deactivation number and cylinder deactivation sequence in the fixed cylinder deactivation operation mode, and the working cylinders are controlled according to the control pulse parameters corresponding to the fixed cylinder deactivation operation mode.

2. The method according to claim 1, characterized in that The determining whether a fixed cylinder deactivation preset condition is met according to the engine oil temperature, the vehicle operating mode and the shift state information includes: Determining whether the engine oil temperature is greater than a preset engine oil temperature value; Determining whether the vehicle operating mode is consistent with a preset value of the vehicle operating mode; Determining whether the gear shifting state information is consistent with a preset value of the gear shifting state information; If it is determined that the engine oil temperature is greater than the preset engine oil temperature value, the vehicle operating mode is consistent with the preset vehicle operating mode value, and the shift state information is consistent with the preset shift state information value, it is determined that the fixed cylinder deactivation preset condition is met.

3. The method according to claim 2, characterized in that The vehicle operating mode preset values ​​include: normal mode, thermal management mode, two-cylinder stop working mode, four-cylinder stop working mode and six-cylinder stop working mode; Accordingly, the determining whether the vehicle operating mode is consistent with a preset vehicle operating mode value includes: If the vehicle operating mode is the normal mode, the thermal management mode, the two-cylinder stop operating mode, the four-cylinder stop operating mode, and the six-cylinder stop operating mode, it is determined that the vehicle operating mode is consistent with a vehicle operating mode preset value.

4. The method according to claim 1, characterized in that The step of acquiring a fixed cylinder deactivation working mode according to the engine speed, the target torque and a preset cylinder deactivation map includes: Acquiring a corresponding relationship between the engine speed and the target torque; The number of cylinders hit by the corresponding relationship in the preset cylinder deactivation map is obtained, and a fixed cylinder deactivation working mode is determined according to the number of cylinders hit.

5. The method according to claim 1, characterized in that: The cylinder deactivation operation is performed according to the cylinder deactivation number and cylinder deactivation sequence in the fixed cylinder deactivation operation mode, including: According to the deactivated cylinder number and the deactivated cylinder sequence, fuel injection to the deactivated cylinders is stopped, and intake valves and exhaust valves of the deactivated cylinders are closed.

6. The method according to any one of claims 1 to 5, characterized in that: After determining whether the fixed cylinder deactivation preset condition is met, the method further includes: If it is determined that the fixed cylinder deactivation preset condition is not met, the vehicle state information of the target vehicle during operation is reacquired.

7. A control system for a fixed cylinder deactivation of an engine, characterized in that: The system comprises: A vehicle status information acquisition unit, used to acquire vehicle status information of the target vehicle when it is running; wherein the vehicle status information includes engine oil temperature, vehicle operating mode and shift status information; a judgment unit, configured to judge whether a fixed cylinder deactivation preset condition is met according to the engine oil temperature, the vehicle working mode and the shift state information; An engine status information acquisition unit is used to acquire the engine status information of the target vehicle when it is running if it is determined that the fixed cylinder deactivation preset condition is met; wherein the engine status information includes the engine speed and the target torque a fixed cylinder deactivation working mode acquisition unit, configured to acquire a fixed cylinder deactivation working mode according to the engine speed, the target torque and a preset cylinder deactivation map; wherein the fixed cylinder deactivation working mode is a symmetrically arranged fixed cylinder deactivation working mode; The control unit is used to perform cylinder deactivation according to the cylinder deactivation number and cylinder deactivation sequence in the fixed cylinder deactivation working mode, and to control the working cylinder according to the control pulse parameters corresponding to the fixed cylinder deactivation working mode.

8. An electronic control unit, characterized in that: include: Memory, processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the processor performs the method according to any one of claims 1 to 6.

9. A vehicle, characterized in that: include: A control system for an engine with fixed cylinder deactivation, wherein the control system for an engine with fixed cylinder deactivation is used to execute the method according to any one of claims 1 to 6.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 6 when executed by a processor.

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