Fuel switching control method, vehicle and computer storage medium

Abstract

This application discloses a fuel switching control method, vehicle, and computer storage medium. The method determines whether to allow fuel switching based on engine water temperature and intake manifold temperature. After the fuel switch is allowed, the method determines a first injection quantity of a first fuel and a second injection quantity of a second fuel at any time during the fuel switching process based on the required torque and intake manifold temperature. During the fuel switching process, the first fuel is injected based on the first injection quantity, and the second fuel is injected based on the second injection quantity until the fuel switch between the first and second fuels is completed. The technical solution of this application enables precise fuel switching.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a fuel switching control method, a vehicle, and a computer storage medium. Background Art

[0002] Currently, in a typical application scenario, a methanol-gasoline engine has 12 nozzles, six of which are methanol nozzles and the other six are gasoline nozzles. At low temperatures, the methanol-gasoline engine requires six gasoline nozzles to atomize the fuel to provide power. When the temperature rises, methanol is used to provide power. Due to the significant difference in the calorific value of the two fuels, the fuel injection amount under the same load varies significantly, making it difficult to determine the correct timing for fuel switching and the precise control of the fuel switching process, which directly affects the engine's driving smoothness. Summary of the Invention

[0003] The main purpose of this application is to provide a fuel switching control method, a vehicle and a computer storage medium, aiming to perform accurate fuel switching.

[0004] To achieve the above objectives, the present application provides a fuel switching control method, which includes:

[0005] determining whether to allow a fuel switch based on the engine water temperature and the intake manifold temperature;

[0006] After the fuel switching is permitted, determining a first injection amount of the first fuel and a second injection amount of the second fuel at any time during the fuel switching process based on the required torque and the intake manifold temperature;

[0007] During the fuel switching process, the first fuel is injected based on the first injection amount, and the second fuel is injected based on the second injection amount until the fuel switching between the first fuel and the second fuel is completed.

[0008] Optionally, the step of determining whether fuel switching is permitted based on the engine water temperature and the intake manifold temperature includes:

[0009] determining whether the engine is in a preset switching temperature range based on the engine water temperature and the intake manifold temperature;

[0010] Based on the determination result of whether the engine is in a preset switching temperature range and the fuel operating mode of the engine, it is determined whether the fuel switching is permitted.

[0011] Optionally, the step of determining whether the engine is in a preset switching temperature range based on the engine water temperature and the intake manifold temperature includes:

[0012] If the engine water temperature is within the preset water temperature low range and the intake manifold temperature is within the preset manifold high temperature range, determining that the engine is within the preset switching temperature range;

[0013] If the engine water temperature is lower than the lower limit temperature of the preset water temperature low range, or the intake manifold temperature is lower than the lower limit temperature of the preset manifold high temperature range, it is determined that the engine is not in the preset switching temperature range.

[0014] Optionally, the step of determining whether to allow fuel switching based on the result of determining whether the engine is in a preset switching temperature range and the fuel operating mode of the engine includes:

[0015] If the engine is in a preset switching temperature range and the fuel operating mode of the engine is a low-temperature fuel combustion mode, a fuel switch is allowed to switch the fuel operating mode of the engine to a high-temperature fuel combustion mode;

[0016] If the engine is in the preset switching temperature range and the fuel operation mode of the engine is the high-temperature fuel combustion mode, the high-temperature fuel combustion mode is maintained.

[0017] Optionally, the step of determining whether to allow fuel switching based on the result of determining whether the engine is in a preset switching temperature range and the fuel operating mode of the engine further includes:

[0018] If the engine is not in the preset switching temperature range and the fuel operation mode of the engine is the low-temperature fuel combustion mode, the low-temperature fuel combustion mode is maintained;

[0019] If the engine is not in the preset switching temperature range and the fuel operating mode of the engine is a high-temperature fuel combustion mode, fuel switching is allowed to switch the fuel operating mode of the engine to a low-temperature fuel combustion mode.

[0020] Optionally, after the fuel switching is allowed, before the step of determining the first injection amount of the first fuel and the second injection amount of the second fuel at any time during the fuel switching process based on the required torque and the intake manifold temperature, the method further includes:

[0021] If the engine water temperature is higher than the upper limit temperature of the preset water temperature low temperature range, and the fuel operating mode of the engine is the low temperature fuel combustion mode, then the fuel switching of the engine fuel operating mode to the high temperature fuel combustion mode is allowed;

[0022] If the engine water temperature is higher than the upper limit temperature of the preset water temperature low temperature range, and the fuel working mode of the engine is the high temperature fuel combustion mode, the high temperature fuel combustion mode is maintained.

[0023] Optionally, the step of determining a first injection amount of the first fuel and a second injection amount of the second fuel at any time during the fuel switching process based on the required torque and the intake manifold temperature includes:

[0024] determining a time point at which a driver-requested torque is received as a start time point for fuel switching;

[0025] determining a first fuel mass when all fuel burned by the engine to output the required torque is the first fuel and a second fuel mass when all fuel burned by the engine is the second fuel;

[0026] determining a switching duration of a fuel switching process at the intake manifold temperature;

[0027] A first injection quantity of the first fuel and a second injection quantity of the second fuel at any time during the fuel switching process are determined based on the start time, the first fuel mass, the second fuel mass, and the switching time.

[0028] Optionally, the step of determining a first injection amount of the first fuel and a second injection amount of the second fuel at any time during the fuel switching process based on the start time, the first fuel mass, the second fuel mass, and the switching duration includes:

[0029] If the fuel switching process is switching from the first fuel to the second fuel, determining a first injection amount of the first fuel at any time during the fuel switching process based on the first proportional relationship, and determining a second injection amount of the second fuel at any time during the fuel switching process based on the second proportional relationship;

[0030] If the fuel switching process is switching from the second fuel to the first fuel, determining a first injection amount of the first fuel at any time during the fuel switching process based on the third proportional relationship, and determining a second injection amount of the second fuel at any time during the fuel switching process based on the fourth proportional relationship;

[0031] Among them, the first proportional relationship is: M1 / Mq=(Tt) / T, the second proportional relationship is: M2 / Mj=t / T, the third proportional relationship is: M1 / Mq=t / T, and the fourth proportional relationship is: M2 / Mj=(Tt) / T; M1 is the first injection quantity, Mj is the second fuel mass; M2 is the second injection quantity, Mq is the first fuel mass; t is the time between any moment and the start moment during the fuel switching process, and T is the switching time.

[0032] In addition, to achieve the above-mentioned purpose, the present application also provides a fuel switching control device, which includes:

[0033] A judgment module, configured to determine whether fuel switching is permitted based on the engine water temperature and the intake manifold temperature;

[0034] an injection quantity determination module, configured to determine, after the fuel switching is permitted, a first injection quantity of the first fuel and a second injection quantity of the second fuel at any time during the fuel switching process based on the required torque and the intake manifold temperature;

[0035] The switching module is configured to inject the first fuel based on the first injection quantity and inject the second fuel based on the second injection quantity during a fuel switching process until the fuel switching between the first fuel and the second fuel is completed.

[0036] Wherein, each functional module of the fuel switching control device can implement the steps of any of the above-mentioned fuel switching control methods when running.

[0037] In addition, to achieve the above-mentioned purpose, the present application also provides a vehicle, which includes: a memory and a processor, wherein the memory stores a computer program that can be used to implement the fuel switching control method, and the memory is used to store the computer program; the processor is used to execute the computer program; when executing the computer program, the processor can implement the steps of the fuel switching control method as described above.

[0038] The present application also provides a computer storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the above-mentioned fuel switching control method are implemented.

[0039] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, including a computer program, which implements the steps of the above-mentioned fuel switching control method when executed by a processor.

[0040] The present application provides a fuel switching control method, a vehicle, and a computer storage medium, which determine whether fuel switching is allowed based on the engine water temperature and the intake manifold temperature; after the fuel switching is allowed, determine a first injection amount of a first fuel and a second injection amount of a second fuel at any time during the fuel switching process based on the required torque and the intake manifold temperature; during the fuel switching process, inject the first fuel based on the first injection amount and inject the second fuel based on the second injection amount until the fuel switching between the first fuel and the second fuel is completed.

[0041] This application determines whether fuel switching is allowed based on the engine water temperature and the intake manifold temperature. Compared with the traditional fuel switching method which only judges the engine water temperature, the fuel switching of all nozzles is performed when the engine water temperature is met, and the timing of fuel switching can be accurately determined.

[0042] After allowing fuel switching, the present application determines a first injection amount of the first fuel and a second injection amount of the second fuel at any point in the fuel switching process based on the driver's requested torque and the intake manifold temperature. During the fuel switching process, the first fuel is injected based on the first injection amount and the second fuel is injected based on the second injection amount, completing the fuel switch between the first and second fuels. Compared to traditional fuel switching methods that switch fuels across all nozzles, this method precisely controls the fuel injection amount during the fuel switching process by switching nozzles sequentially, thereby adjusting the mixing ratio of the different fuels during the fuel switching process.

[0043] Specifically, this application provides more precise and accurate judgment of fuel switching timing before switching. During the switching process, if the driver's torque request is received, the fuel mix ratio can be accurately adjusted, allowing for smooth fuel switching while responding to the torque request. This ensures proper fuel atomization during the fuel switching process, reduces fuel consumption, and minimizes torque fluctuations during the fuel switching process. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] 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.

[0045] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0046] Figure 1 This is a flow chart of the first embodiment of the fuel switching control method of the present application;

[0047] Figure 2 This is an application flow chart of an embodiment of the fuel switching control method of the present application;

[0048] Figure 3 This is a structural diagram of the functional modules involved in one embodiment of the fuel switching control device of the present application;

[0049] Figure 4 This is a schematic diagram of the equipment structure of the hardware operating environment involved in the vehicle embodiment of the present application.

[0050] The purpose, features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0051] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0052] It should be noted that, in a typical application scenario, a methanol-gasoline engine with 12 nozzles is used, for example: six are methanol nozzles and the other six are gasoline nozzles. At low temperatures, the methanol-gasoline engine requires six gasoline nozzles to atomize the fuel to provide power. When the temperature rises, methanol is used to provide power. Due to the significant difference in calorific value between the two fuels, the fuel injection amount under the same load varies significantly, making it difficult to determine the correct timing for fuel switching and the precise control of the fuel switching process, which directly affects the engine's ride comfort.

[0053] Based on the above phenomenon, an embodiment of the present application provides a fuel switching control method, which determines whether fuel switching is allowed based on the engine water temperature and the intake manifold temperature. Compared with the traditional fuel switching method that only judges the engine water temperature, the fuel switching of all nozzles is performed when the engine water temperature is met, and the timing of fuel switching can be accurately determined.

[0054] After the fuel switch is permitted, a first injection quantity of the first fuel and a second injection quantity of the second fuel are determined at any point in the fuel switch process based on the driver's requested torque and the intake manifold temperature. During the fuel switch process, the first fuel is injected based on the first injection quantity, and the second fuel is injected based on the second injection quantity, completing the fuel switch between the first and second fuels. Compared to traditional fuel switching methods that switch all nozzles, this method precisely controls the fuel injection quantity during the fuel switch process by switching nozzles sequentially, thereby adjusting the mixture ratio of the different fuels during the fuel switch process.

[0055] Specifically, before switching fuels, the timing of the switch is determined with greater precision and accuracy. During the switch, if the driver's torque request is received, the fuel mix ratio can be precisely adjusted, allowing for smooth fuel switching while responding to the torque request. This ensures proper fuel atomization during the fuel switch, minimizing fuel consumption and reducing torque fluctuations during the switch.

[0056] Based on the overall concept of the fuel switching control method of the present application, a first embodiment of the fuel switching control method of the present application is proposed.

[0057] Please refer to Figure 1 , Figure 1 This is a flowchart of the steps of the first embodiment of the fuel switching control method of the present application. It should be noted that although the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than here.

[0058] Furthermore, in this embodiment, the fuel switching control method of the present application can be executed by the vehicle itself. Alternatively, the method can be executed by a data processing terminal integrated within the vehicle or by a terminal device external to the vehicle. For ease of explanation and understanding, the following description of each embodiment of the fuel switching control method of the present application will use the vehicle's electronic control unit (ECU) as the executing entity.

[0059] like Figure 1 As shown, in the first embodiment of the fuel switching control method of the present application, the fuel switching control method of the present application specifically includes the following steps:

[0060] Step S10, determining whether fuel switching is allowed based on the engine water temperature and the intake manifold temperature;

[0061] In this embodiment, the intake manifold temperature is further selected based on the engine water temperature, and the two together determine whether to allow the engine fuel switch. Optionally, the fuel switch can be between methanol and gasoline.

[0062] Reference Figure 2 In one embodiment, when the engine operates normally and no fault affecting the switching occurs, the electronic control unit ECU reads the current engine water temperature Tw and intake manifold temperature Tm, and then determines whether to allow fuel switching based on the engine water temperature Tw and intake manifold temperature Tm.

[0063] Step S20, after the fuel switching is allowed, determining a first injection amount of the first fuel and a second injection amount of the second fuel at any time during the fuel switching process based on the required torque and the intake manifold temperature;

[0064] After determining that fuel switching is permitted based on the engine water temperature and the intake manifold temperature, the driver's requested torque is obtained. A first injection amount of the first fuel and a second injection amount of the second fuel are determined at any point in the fuel switching process based on the driver's requested torque and the intake manifold temperature. In this application, methanol is used as the first fuel and gasoline is used as the second fuel for illustration.

[0065] Step S30 : Injecting the first fuel based on the first injection quantity and injecting the second fuel based on the second injection quantity during the fuel switching process until the fuel switching between the first fuel and the second fuel is completed.

[0066] During the fuel switching process, the first fuel is injected based on the first injection amount, and the second fuel is injected based on the second injection amount. The first injection amount and the second injection amount at any time may change with the time when the driver's torque request is received. The fuel switching between the first fuel and the second fuel is completed by opening or closing the corresponding fuel nozzles in sequence to inject the first fuel and the second fuel in different injection amounts.

[0067] In this embodiment, the present application determines whether fuel switching is allowed based on the engine water temperature and the intake manifold temperature. Compared with the traditional fuel switching method which only judges the engine water temperature, the fuel switching of all nozzles is performed when the engine water temperature is met, and the timing of fuel switching can be accurately determined.

[0068] In this embodiment, after allowing fuel switching, the present application determines a first injection amount of the first fuel and a second injection amount of the second fuel at any point in the fuel switching process based on the driver's requested torque and the intake manifold temperature. During the fuel switching process, the first fuel is injected based on the first injection amount and the second fuel is injected based on the second injection amount, completing the fuel switch between the first and second fuels. Compared to traditional fuel switching methods that switch fuels across all nozzles, this method precisely controls the fuel injection amount during the fuel switching process by switching nozzles sequentially, thereby adjusting the mixing ratio of the different fuels during the fuel switching process.

[0069] Specifically, in this embodiment, the present invention provides more precise and accurate judgment criteria for fuel switching timing before switching. During the switching process, if the driver's torque request is received, the fuel mixture ratio can be accurately adjusted, allowing for smooth fuel switching while responding to the torque request. This ensures proper fuel atomization during the fuel switching process, reduces fuel consumption, and minimizes torque fluctuations during the fuel switching process.

[0070] Furthermore, based on the above-mentioned first embodiment of the fuel switching control method of the present application, a second embodiment of the fuel switching control method of the present application is proposed.

[0071] In the second embodiment of the fuel switching control method of the present application, the step of "determining whether to allow fuel switching based on the engine water temperature and intake manifold temperature" in the above-mentioned step S10 may include:

[0072] determining whether the engine is in a preset switching temperature range based on the engine water temperature and the intake manifold temperature;

[0073] Based on the determination result of whether the engine is in a preset switching temperature range and the fuel operating mode of the engine, it is determined whether the fuel switching is permitted.

[0074] When determining whether fuel switching is allowed based on the engine water temperature and the intake manifold temperature, first determine whether the engine is in a preset switching temperature range based on the engine water temperature and the intake manifold temperature. Then, based on the judgment result of whether the engine is in the preset switching temperature range and the fuel working mode of the engine, determine whether fuel switching is allowed.

[0075] In one embodiment, the preset switching temperature range is a high-temperature temperature range corresponding to switching the current fuel from low-temperature gasoline to high-temperature methanol. That is, the preset switching temperature range is a temperature range in which gasoline can be switched to methanol. The engine's fuel operating mode includes a low-temperature fuel combustion mode and a high-temperature fuel combustion mode. Optionally, the low-temperature fuel combustion mode is a gasoline operating mode, and the high-temperature fuel combustion mode is a methanol operating mode.

[0076] In some feasible embodiments, the step of “determining whether the engine is in a preset switching temperature range based on the engine water temperature and the intake manifold temperature” includes:

[0077] If the engine water temperature is within the preset water temperature low range and the intake manifold temperature is within the preset manifold high temperature range, determining that the engine is within the preset switching temperature range;

[0078] If the engine water temperature is lower than the lower limit temperature of the preset water temperature low range, or the intake manifold temperature is lower than the lower limit temperature of the preset manifold high temperature range, it is determined that the engine is not in the preset switching temperature range.

[0079] Reference Figure 2 When determining whether the engine is in the preset switching temperature range based on the engine water temperature and the intake manifold temperature, if the engine water temperature Tw is in the preset water temperature low temperature range and the intake manifold temperature Tm is in the preset manifold high temperature range, optionally, the preset water temperature low temperature range is (25°C, 60°C) and the preset manifold high temperature range is (10°C, +∞), then it is determined that the engine is in the preset switching temperature range.

[0080] Reference Figure 2 When determining whether the engine is in the preset switching temperature range based on the engine water temperature and the intake manifold temperature, if the engine water temperature Tw is lower than the lower limit temperature of the preset water temperature low temperature range, or the intake manifold temperature is lower than the lower limit temperature of the preset manifold high temperature range, optionally, the lower limit temperature of the preset water temperature low temperature range is 25°C, and the lower limit temperature of the preset manifold high temperature range is 10°C, then it is determined that the engine is not in the preset switching temperature range.

[0081] In some feasible embodiments, the step of “determining whether to allow fuel switching based on the result of determining whether the engine is in a preset switching temperature range and the fuel operating mode of the engine” includes:

[0082] If the engine is in a preset switching temperature range and the fuel operating mode of the engine is a low-temperature fuel combustion mode, a fuel switch is allowed to switch the fuel operating mode of the engine to a high-temperature fuel combustion mode;

[0083] If the engine is in the preset switching temperature range and the fuel operation mode of the engine is the high-temperature fuel combustion mode, the high-temperature fuel combustion mode is maintained.

[0084] Reference Figure 2 When determining whether fuel switching is allowed based on the judgment result of whether the engine is in a preset switching temperature range and the fuel working mode of the engine, if the engine is in the preset switching temperature range and the fuel working mode of the engine is a low-temperature fuel combustion mode, optionally, the low-temperature fuel combustion mode is a gasoline working mode, then fuel switching is allowed to switch the fuel working mode of the engine to a high-temperature fuel combustion mode, optionally, the high-temperature fuel combustion mode is a methanol working mode.

[0085] Reference Figure 2 When determining whether fuel switching is allowed based on the judgment result of whether the engine is in a preset switching temperature range and the fuel working mode of the engine, if the engine is in the preset switching temperature range and the fuel working mode of the engine is a high-temperature fuel combustion mode, optionally, the high-temperature fuel combustion mode is a methanol working mode, then the high-temperature fuel combustion mode is maintained.

[0086] In some feasible embodiments, the step of “determining whether to allow fuel switching based on the result of determining whether the engine is in a preset switching temperature range and the fuel operating mode of the engine” further includes:

[0087] If the engine is not in the preset switching temperature range and the fuel operation mode of the engine is the low-temperature fuel combustion mode, the low-temperature fuel combustion mode is maintained;

[0088] If the engine is not in the preset switching temperature range and the fuel operating mode of the engine is a high-temperature fuel combustion mode, fuel switching is allowed to switch the fuel operating mode of the engine to a low-temperature fuel combustion mode.

[0089] Reference Figure 2 When determining whether fuel switching is allowed based on the judgment result of whether the engine is in a preset switching temperature range and the fuel working mode of the engine, if the engine is not in the preset switching temperature range and the fuel working mode of the engine is a low-temperature fuel combustion mode, optionally, the low-temperature fuel combustion mode is a gasoline working mode, then the low-temperature fuel combustion mode is maintained.

[0090] Reference Figure 2When determining whether fuel switching is allowed based on the judgment result of whether the engine is in a preset switching temperature range and the fuel working mode of the engine, if the engine is not in the preset switching temperature range and the fuel working mode of the engine is a high-temperature fuel combustion mode, optionally, the high-temperature fuel combustion mode is a methanol working mode, then fuel switching is allowed to switch the fuel working mode of the engine to a low-temperature fuel combustion mode, optionally, the low-temperature fuel combustion mode is a gasoline working mode.

[0091] In some feasible embodiments, the fuel switching control method of the present application may further include, before the step of “after allowing the fuel switching, determining the first injection amount of the first fuel and the second injection amount of the second fuel at any time during the fuel switching process based on the required torque and the intake manifold temperature”:

[0092] If the engine water temperature is higher than the upper limit temperature of the preset water temperature low temperature range, and the fuel operating mode of the engine is the low temperature fuel combustion mode, then the fuel switching of the engine fuel operating mode to the high temperature fuel combustion mode is allowed;

[0093] If the engine water temperature is higher than the upper limit temperature of the preset water temperature low temperature range, and the fuel working mode of the engine is the high temperature fuel combustion mode, the high temperature fuel combustion mode is maintained.

[0094] In this embodiment, a method is proposed for determining whether fuel switching is permitted based on the engine water temperature.

[0095] Reference Figure 2 If the engine water temperature is higher than the upper limit temperature of the preset water temperature low temperature range, optionally, the upper limit temperature of the preset water temperature low temperature range is 60°C, and the fuel working mode of the engine is the low-temperature fuel combustion mode, optionally, the low-temperature fuel combustion mode is the gasoline working mode, then it is allowed to switch the fuel working mode of the engine to the high-temperature fuel combustion mode, optionally, the high-temperature fuel combustion mode is the methanol working mode.

[0096] Reference Figure 2 If the engine water temperature is higher than the upper limit temperature of the preset water temperature low temperature range, optionally, the upper limit temperature of the preset water temperature low temperature range is 60°C, and the fuel working mode of the engine is the high-temperature fuel combustion mode, optionally, the high-temperature fuel combustion mode is the methanol working mode, then the high-temperature fuel combustion mode is maintained.

[0097] This embodiment proposes a method for determining whether a fuel switch is permitted based on engine water temperature and intake manifold temperature. By defining a preset switching temperature range and obtaining the engine's fuel operating mode, the method determines whether a fuel switch is permitted based on the engine's presence in the preset switching temperature range and the engine's fuel operating mode. Compared to traditional fuel switching methods that only determine engine water temperature, this method accurately determines the timing of a fuel switch by switching all nozzles when the engine water temperature meets the requirements. This allows for more precise and accurate determination of the fuel switch timing before a fuel switch occurs.

[0098] Furthermore, based on the above-mentioned first embodiment of the fuel switching control method of the present application, a third embodiment of the fuel switching control method of the present application is proposed.

[0099] In the third embodiment of the fuel switching control method of the present application, the step of “determining a first injection amount of the first fuel and a second injection amount of the second fuel at any time during the fuel switching process based on the required torque and the intake manifold temperature” in step S20 may include:

[0100] determining a time point at which a driver-requested torque is received as a start time point for fuel switching;

[0101] determining a first fuel mass when all fuel burned by the engine to output the required torque is the first fuel and a second fuel mass when all fuel burned by the engine is the second fuel;

[0102] determining a switching duration of a fuel switching process at the intake manifold temperature;

[0103] A first injection quantity of the first fuel and a second injection quantity of the second fuel at any time during the fuel switching process are determined based on the start time, the first fuel mass, the second fuel mass, and the switching time.

[0104] Reference Figure 2 When determining a first injection amount of the first fuel and a second injection amount of the second fuel at any time during the fuel switching process based on the required torque requested by the driver and the intake manifold temperature, the time when the required torque requested by the driver is received is determined as the start time of the fuel switching.

[0105] Determine the first fuel mass Mq when all the fuel burned by the engine to output the required torque is the first fuel, determine the second fuel mass Mj when all the fuel burned by the engine to output the required torque is the second fuel, and optionally, calculate the first fuel mass Mq when all the fuel burned in the single fuel working mode is the first fuel and the second fuel mass Mj when all the fuel burned is the second fuel.

[0106] The switching duration T of the fuel switching process at the intake manifold temperature Tm is determined. Furthermore, a preset mapping table CUR between intake manifold temperatures and switching durations is queried according to the current intake manifold temperature Tm to obtain the fuel switching transition time at the intake manifold temperature Tm, that is, the switching duration T.

[0107] Finally, based on the start time, the first fuel mass Mq, the second fuel mass Mj and the switching time T, the first injection amount M1 of the first fuel and the second injection amount M2 of the second fuel at any time during the fuel switching process are determined.

[0108] In some feasible embodiments, the step of “determining a first injection amount of the first fuel and a second injection amount of the second fuel at any time during the fuel switching process based on the start time, the first fuel mass, the second fuel mass, and the switching duration” includes:

[0109] If the fuel switching process is switching from the first fuel to the second fuel, determining a first injection amount of the first fuel at any time during the fuel switching process based on the first proportional relationship, and determining a second injection amount of the second fuel at any time during the fuel switching process based on the second proportional relationship;

[0110] If the fuel switching process is switching from the second fuel to the first fuel, determining a first injection amount of the first fuel at any time during the fuel switching process based on the third proportional relationship, and determining a second injection amount of the second fuel at any time during the fuel switching process based on the fourth proportional relationship;

[0111] Among them, the first proportional relationship is: M1 / Mq=(Tt) / T, the second proportional relationship is: M2 / Mj=t / T, the third proportional relationship is: M1 / Mq=t / T, and the fourth proportional relationship is: M2 / Mj=(Tt) / T; M1 is the first injection quantity, Mj is the second fuel mass; M2 is the second injection quantity, Mq is the first fuel mass; t is the time between any moment and the start moment during the fuel switching process, and T is the switching time.

[0112] When determining the first injection quantity M1 of the first fuel and the second injection quantity M2 of the second fuel at any moment in the fuel switching process based on the start time, the first fuel mass Mq, the second fuel mass Mj and the switching time T, if the fuel switching process is to switch the first fuel to the second fuel, the first injection quantity M1 of the first fuel at any moment in the fuel switching process is determined based on the first proportional relationship M1 / Mq=(Tt) / T, and the second injection quantity M2 of the second fuel at any moment in the fuel switching process is determined based on the second proportional relationship M2 / Mj=t / T; thereby, at the end of the fuel switching after the switching time T, the first fuel is completely switched to the second fuel.

[0113] If the fuel switching process involves switching from the second fuel to the first fuel, a first injection quantity M1 of the first fuel at any point in the fuel switching process is determined based on the third proportional relationship M1 / Mq = t / T, and a second injection quantity M2 of the second fuel at any point in the fuel switching process is determined based on the fourth proportional relationship M2 / Mj = (Tt) / T. Thus, at the end of the fuel switching process after the switching time T has elapsed, the second fuel is completely switched to the first fuel.

[0114] This embodiment proposes a method for determining a first injection amount of a first fuel and a second injection amount of a second fuel at any point in a fuel switching process based on the driver's requested torque and intake manifold temperature. By defining a proportional relationship between fuel mass and the duration of the fuel switching process, the fuel injection amount at any point in the switching process is determined. Compared to traditional fuel switching methods that switch fuels across all nozzles, this method precisely controls the fuel injection amount during the fuel switching process by switching nozzles sequentially, thereby adjusting the mixture ratio of the different fuels during the fuel switching process. This allows accurate adjustment of the mixture ratio of the different fuels during the switching process if a driver torque request is received, ensuring smooth fuel switching while responding to the torque request.

[0115] In addition, the present application also provides a fuel switching control device, such as Figure 3 As shown, the fuel switching control device of the present application includes:

[0116] A judgment module 10 is used to determine whether fuel switching is allowed based on the engine water temperature and the intake manifold temperature;

[0117] an injection quantity determination module 20 for determining, after the fuel switching is permitted, a first injection quantity of the first fuel and a second injection quantity of the second fuel at any time during the fuel switching process based on the required torque and the intake manifold temperature;

[0118] The switching module 30 is configured to inject the first fuel based on the first injection quantity and inject the second fuel based on the second injection quantity during a fuel switching process until the fuel switching between the first fuel and the second fuel is completed.

[0119] Optionally, the judgment module is further configured to:

[0120] determining whether the engine is in a preset switching temperature range based on the engine water temperature and the intake manifold temperature;

[0121] Based on the determination result of whether the engine is in a preset switching temperature range and the fuel operating mode of the engine, it is determined whether the fuel switching is permitted.

[0122] Optionally, the judgment module is further configured to:

[0123] If the engine water temperature is within the preset water temperature low range and the intake manifold temperature is within the preset manifold high temperature range, determining that the engine is within the preset switching temperature range;

[0124] If the engine water temperature is lower than the lower limit temperature of the preset water temperature low range, or the intake manifold temperature is lower than the lower limit temperature of the preset manifold high range, it is determined that the engine is not in the preset switching temperature range.

[0125] Optionally, the judgment module is further configured to:

[0126] If the engine is in a preset switching temperature range and the fuel operating mode of the engine is a low-temperature fuel combustion mode, a fuel switch is allowed to switch the fuel operating mode of the engine to a high-temperature fuel combustion mode;

[0127] If the engine is in the preset switching temperature range and the fuel operation mode of the engine is the high-temperature fuel combustion mode, the high-temperature fuel combustion mode is maintained.

[0128] Optionally, the judgment module is further configured to:

[0129] If the engine is not in the preset switching temperature range and the fuel operation mode of the engine is the low-temperature fuel combustion mode, the low-temperature fuel combustion mode is maintained;

[0130] If the engine is not in the preset switching temperature range and the fuel operating mode of the engine is a high-temperature fuel combustion mode, fuel switching is allowed to switch the fuel operating mode of the engine to a low-temperature fuel combustion mode.

[0131] Optionally, the judgment module is further configured to:

[0132] Before the step of determining, after the fuel switching is allowed, a first injection amount of the first fuel and a second injection amount of the second fuel at any time during the fuel switching process based on the required torque and the intake manifold temperature:

[0133] If the engine water temperature is higher than the upper limit temperature of the preset water temperature low temperature range, and the fuel operating mode of the engine is the low temperature fuel combustion mode, then the fuel switching of the engine fuel operating mode to the high temperature fuel combustion mode is allowed;

[0134] If the engine water temperature is higher than the upper limit temperature of the preset water temperature low temperature range, and the fuel working mode of the engine is the high temperature fuel combustion mode, the high temperature fuel combustion mode is maintained.

[0135] Optionally, the injection quantity determination module is further configured to:

[0136] determining a time when a driver's request for the required torque is received as a start time of fuel switching;

[0137] determining a first fuel mass when all fuel burned by the engine to output the required torque is the first fuel and a second fuel mass when all fuel burned by the engine is the second fuel;

[0138] determining a switching duration of a fuel switching process at the intake manifold temperature;

[0139] A first injection quantity of the first fuel and a second injection quantity of the second fuel at any time during the fuel switching process are determined based on the start time, the first fuel mass, the second fuel mass, and the switching time.

[0140] Optionally, the injection quantity determination module is further configured to:

[0141] If the fuel switching process is switching from the first fuel to the second fuel, determining a first injection amount of the first fuel at any time during the fuel switching process based on the first proportional relationship, and determining a second injection amount of the second fuel at any time during the fuel switching process based on the second proportional relationship;

[0142] If the fuel switching process is switching from the second fuel to the first fuel, determining a first injection amount of the first fuel at any time during the fuel switching process based on the third proportional relationship, and determining a second injection amount of the second fuel at any time during the fuel switching process based on the fourth proportional relationship;

[0143] Among them, the first proportional relationship is: M1 / Mq=(Tt) / T, the second proportional relationship is: M2 / Mj=t / T, the third proportional relationship is: M1 / Mq=t / T, and the fourth proportional relationship is: M2 / Mj=(Tt) / T; M1 is the first injection quantity, Mj is the second fuel mass; M2 is the second injection quantity, Mq is the first fuel mass; t is the time between any moment and the start moment during the fuel switching process, and T is the switching time.

[0144] The specific implementation of the fuel switching control device of the present application is basically the same as the various embodiments of the above-mentioned fuel switching control method, and will not be repeated here.

[0145] In addition, an embodiment of the present application also provides a vehicle as mentioned in any of the above embodiments.

[0146] Reference Figure 4 , Figure 4 It is a schematic diagram of the equipment structure of the hardware operating environment involved in the vehicle mentioned in the embodiment of the present application.

[0147] like Figure 4As shown, the vehicle may include: a processor 1001, such as a CPU, a memory 1005, and a communication bus 1002. Communication bus 1002 is used to enable communication between processor 1001 and memory 1005. Memory 1005 may be a high-speed RAM memory or a non-volatile memory, such as a disk drive. Memory 1005 may also optionally be a storage device independent of processor 1001.

[0148] Optionally, the vehicle also includes a vehicle control unit (VCU), a battery management system (BMS), an engine management system (EMS) and a generator control unit (GCU). The vehicle control unit (VCU) communicates with the battery management system (BMS) and the like through an external public CAN, and communicates with the engine management system (EMS) and the generator control unit (GCU) through an internal CAN. In addition, the vehicle may also include a body controller BCM, an ECU and a rectangular user interface, a network interface, a camera, an RF (Radio Frequency) circuit, a sensor, an audio circuit, a WiFi module, and the like. The rectangular user interface may include a display (Display), an input submodule such as a keyboard (Keyboard), and the optional rectangular user interface may also include a standard wired interface and a wireless interface. The network interface may optionally include a standard wired interface and a wireless interface (such as a WI-FI interface). The vehicle is also connected to the remote service platform TSP via T-BOX for communication.

[0149] Those skilled in the art will understand that Figure 4 The structure shown in the figure does not constitute a limitation on the vehicle. Based on different design requirements of actual applications, in different feasible implementations, the vehicle may of course include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0150] like Figure 4 As shown, memory 1005, a storage medium, may include an operating system, a network communication module, and a fuel switching control program. The operating system manages and controls vehicle hardware and software resources, supporting the operation of the fuel switching control program and other software and / or programs. The network communication module facilitates communication between components within memory 1005, as well as with other hardware and software within the fuel switching control device.

[0151] exist Figure 4 In the vehicle shown, the processor 1001 is used to execute the fuel switching control program stored in the memory 1005 to implement the steps of the fuel switching control method described in any of the above embodiments.

[0152] The specific implementation of the vehicle of the present application is basically the same as the above-mentioned embodiments of the fuel switching control method, and will not be repeated here.

[0153] In addition, an embodiment of the present application also provides a computer storage medium, and the computer storage medium stores one or more programs, and the one or more programs can also be executed by one or more processors to implement the steps of any of the above-mentioned fuel switching control methods.

[0154] The specific implementation of the computer storage medium of the present application is basically the same as the various embodiments of the above-mentioned fuel switching control method, and will not be repeated here.

[0155] In addition, the present application also provides a computer program product, including a computer program, which implements the steps of the above-mentioned fuel switching control method when executed by a processor.

[0156] The specific implementation of the computer program product of the present application is basically the same as the various embodiments of the above-mentioned fuel switching control method, and will not be repeated here.

[0157] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0158] The serial numbers of the above embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0159] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for enabling a terminal device (which can be a car computer, smart phone, computer, or server, etc.) to execute the methods described in each embodiment of the present application.

[0160] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A fuel switching control method, characterized in that: The method comprises: determining whether to allow a fuel switch based on the engine water temperature and the intake manifold temperature; After the fuel switching is permitted, determining a first injection amount of the first fuel and a second injection amount of the second fuel at any time during the fuel switching process based on the required torque and the intake manifold temperature; injecting the first fuel based on the first injection amount and injecting the second fuel based on the second injection amount during a fuel switching process until the fuel switching between the first fuel and the second fuel is completed; The step of determining a first injection amount of the first fuel and a second injection amount of the second fuel at any time during the fuel switching process based on the required torque and the intake manifold temperature includes: determining a time point at which a driver-requested torque is received as a start time point for fuel switching; determining a first fuel mass when all fuel burned by the engine to output the required torque is the first fuel and a second fuel mass when all fuel burned by the engine is the second fuel; determining a switching duration of a fuel switching process at the intake manifold temperature; A first injection quantity of the first fuel and a second injection quantity of the second fuel at any time during the fuel switching process are determined based on the start time, the first fuel mass, the second fuel mass, and the switching time.

2. The fuel switching control method according to claim 1, wherein: The step of determining whether fuel switching is permitted based on the engine water temperature and the intake manifold temperature includes: determining whether the engine is in a preset switching temperature range based on the engine water temperature and the intake manifold temperature; Based on the determination result of whether the engine is in a preset switching temperature range and the fuel operating mode of the engine, it is determined whether the fuel switching is permitted.

3. The fuel switching control method according to claim 2, wherein: The step of determining whether the engine is in a preset switching temperature range based on the engine water temperature and the intake manifold temperature includes: If the engine water temperature is within the preset water temperature low range and the intake manifold temperature is within the preset manifold high temperature range, determining that the engine is within the preset switching temperature range; If the engine water temperature is lower than the lower limit temperature of the preset water temperature low range, or the intake manifold temperature is lower than the lower limit temperature of the preset manifold high temperature range, it is determined that the engine is not in the preset switching temperature range.

4. The fuel switching control method according to claim 2, wherein: The step of determining whether to allow fuel switching based on the result of determining whether the engine is in a preset switching temperature range and the fuel operating mode of the engine includes: If the engine is in a preset switching temperature range and the fuel operating mode of the engine is a low-temperature fuel combustion mode, a fuel switch is allowed to switch the fuel operating mode of the engine to a high-temperature fuel combustion mode; If the engine is in the preset switching temperature range and the fuel operation mode of the engine is the high-temperature fuel combustion mode, the high-temperature fuel combustion mode is maintained.

5. The fuel switching control method according to claim 2, wherein: The step of determining whether to allow fuel switching based on the result of determining whether the engine is in a preset switching temperature range and the fuel operating mode of the engine further includes: If the engine is not in the preset switching temperature range and the fuel operation mode of the engine is the low-temperature fuel combustion mode, the low-temperature fuel combustion mode is maintained; If the engine is not in the preset switching temperature range and the fuel operating mode of the engine is a high-temperature fuel combustion mode, fuel switching is allowed to switch the fuel operating mode of the engine to a low-temperature fuel combustion mode.

6. The fuel switching control method according to claim 1, wherein: Before the step of determining, after the fuel switching is allowed, a first injection amount of the first fuel and a second injection amount of the second fuel at any time during the fuel switching process based on the required torque and the intake manifold temperature, the method further comprises: If the engine water temperature is higher than the upper limit temperature of the preset water temperature low temperature range, and the fuel operating mode of the engine is the low temperature fuel combustion mode, then the fuel switching of the engine fuel operating mode to the high temperature fuel combustion mode is allowed; If the engine water temperature is higher than the upper limit temperature of the preset water temperature low temperature range, and the fuel working mode of the engine is the high temperature fuel combustion mode, the high temperature fuel combustion mode is maintained.

7. The fuel switching control method according to claim 1, wherein: The step of determining a first injection amount of the first fuel and a second injection amount of the second fuel at any time during the fuel switching process based on the start time, the first fuel mass, the second fuel mass, and the switching duration includes: If the fuel switching process is switching from the first fuel to the second fuel, determining a first injection amount of the first fuel at any time during the fuel switching process based on the first proportional relationship, and determining a second injection amount of the second fuel at any time during the fuel switching process based on the second proportional relationship; If the fuel switching process is switching from the second fuel to the first fuel, determining a first injection amount of the first fuel at any time during the fuel switching process based on the third proportional relationship, and determining a second injection amount of the second fuel at any time during the fuel switching process based on the fourth proportional relationship; Among them, the first proportional relationship is: M1 / Mq=(Tt) / T, the second proportional relationship is: M2 / Mj=t / T, the third proportional relationship is: M1 / Mq=t / T, and the fourth proportional relationship is: M2 / Mj=(Tt) / T; M1 is the first injection quantity, Mj is the second fuel mass; M2 is the second injection quantity, Mq is the first fuel mass; t is the time between any moment and the start moment during the fuel switching process, and T is the switching time.

8. A vehicle, characterized in that: The vehicle includes: a memory and a processor, wherein the memory stores a computer program that can be used to implement the fuel switching control method. The memory is used to store the computer program; The processor is configured to execute the computer program to implement the steps of the fuel switching control method according to any one of claims 1 to 7.

9. A computer storage medium, characterized in that The computer storage medium stores a computer program for implementing the fuel switching control method, and the computer program is executed by a processor to implement the steps of the fuel switching control method according to any one of claims 1 to 7.

Images