Method, device, terminal device and computer medium for switching engine modes

Abstract

The present invention discloses a method, device, terminal device and computer medium for switching engine modes, including: when it is determined that the vehicle is in a low-temperature environment, controlling the methanol engine in the vehicle to start in gasoline mode to increase the engine water temperature, and after the engine water temperature rises to a certain temperature, controlling the methanol engine to switch to methanol mode for operation, and then when the remaining amount of methanol in the methanol engine is low, controlling the methanol engine to switch back to gasoline mode for operation, and finally, when the remaining amount of gasoline in the methanol engine is low, controlling the methanol engine to enter the gasoline forced mode from gasoline mode; adopting the present invention can achieve the technical effect of enabling the target engine to switch modes in time when the methanol fuel or gasoline fuel is insufficient, and improving the vehicle endurance function.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and particularly to a method, device, terminal device and computer-readable storage medium for switching engine modes. Background Art

[0002] With the rapid development of the automotive industry, methanol fuel has gradually become one of the main fuels used in new energy vehicles due to its advantages such as clean emissions and good economy. However, due to the characteristics of large latent heat of vaporization and poor evaporability of methanol fuel in low-temperature environments, it is difficult for methanol fuel to reach the ignition limit in low-temperature environments, resulting in difficulty in starting a methanol engine in low-temperature environments.

[0003] Currently, technicians mainly configure two fuel supply systems, namely a methanol fuel supply system and a gasoline fuel supply system, in the fuel supply system of a methanol engine. Among them, the gasoline fuel supply system is mainly used to control the methanol engine to start in gasoline mode, so that the methanol engine is heated in gasoline mode until it meets the conditions and then switched to methanol mode for operation. However, when using this method, when the vehicle is running in methanol mode, once the methanol fuel runs out, the driver often cannot drive to the nearest refueling station, and finally the driver can only stop and wait for rescue. Summary of the Invention

[0004] The main object of the present invention is to provide a method, device, terminal device and computer-readable storage medium for switching engine modes, aiming to enable a target engine to promptly switch modes when methanol fuel or gasoline fuel is insufficient, thereby improving the endurance function of the vehicle.

[0005] To achieve the above object, the present invention provides a method for switching engine modes, and the method for switching engine modes includes the following steps:

[0006] Receive a start instruction, obtain a first engine water temperature and a first gasoline liquid level line when the target engine is in the start-up stage according to the start instruction, and when it is determined that the first engine water temperature is less than a preset temperature threshold and the first gasoline liquid level line is greater than or equal to a preset gasoline threshold, control the target engine to enter gasoline mode;

[0007] Obtain a second engine water temperature, a gasoline mode operation time and a first methanol liquid level line of the target engine in the gasoline mode, and when the second engine water temperature is greater than or equal to the temperature threshold, the gasoline mode operation time is greater than or equal to a preset operation time threshold and the first methanol liquid level line is greater than or equal to a preset methanol threshold, control the target engine to switch from the gasoline mode to the methanol mode;

[0008] Obtain the second methanol liquid level line, the second gasoline liquid level line, and the remaining cruising range corresponding to the target engine in the methanol mode, and when the second methanol liquid level line is less than the methanol threshold, the second gasoline liquid level line is greater than or equal to the gasoline threshold, and the remaining cruising range is less than the preset cruising range threshold, control the target engine to switch from the methanol mode to the gasoline mode;

[0009] Obtain the third gasoline liquid level line of the target engine in the gasoline mode, and when the third gasoline liquid level line is less than the gasoline threshold, control the target engine to switch from the gasoline mode to the gasoline forced mode.

[0010] Further, after the step of controlling the target engine to switch from the gasoline mode to the gasoline forced mode, the method further includes:

[0011] Obtain the first power reduction rate and the first power reduction duration of the target engine in the gasoline forced mode;

[0012] When the first power reduction rate is greater than or equal to the preset power reduction threshold and the first power reduction duration is greater than or equal to the preset reduction time threshold, control the target engine to switch from the gasoline forced mode to the methanol forced mode.

[0013] Further, after the step of controlling the target engine to switch from the gasoline forced mode to the methanol forced mode, the method further includes:

[0014] Obtain the second power reduction rate and the second power reduction duration of the target engine in the methanol forced mode;

[0015] When the second power reduction rate is greater than or equal to the power reduction threshold and the second power reduction duration is greater than or equal to the reduction time threshold, control the target engine to perform a forced shutdown operation.

[0016] Further, after the step of obtaining the first engine water temperature and the first gasoline liquid level line when the target engine is in the starting stage according to the start instruction, the method further includes:

[0017] When the first engine water temperature is less than the preset temperature threshold and the first gasoline liquid level line is less than the preset gasoline threshold, control the target energy recovery module to perform an energy recovery operation;

[0018] Or,

[0019] Obtain the third methanol liquid level line when the target engine is in the starting stage, and when the first engine water temperature is greater than or equal to the temperature threshold and the third methanol liquid level line is less than a preset methanol threshold, control the target energy recovery module to perform an energy recovery operation.

[0020] Further, after the step of obtaining the first engine water temperature and the first gasoline liquid level line when the target engine is in the starting stage according to the start instruction, the method further includes:

[0021] When the first engine water temperature is greater than or equal to the temperature threshold and the third methanol liquid level line is greater than the methanol threshold, control the target engine to enter the methanol mode;

[0022] Obtain the second methanol liquid level line, the second gasoline liquid level line and the remaining cruising range corresponding to the target engine in the methanol mode, and when the second methanol liquid level line is less than the methanol threshold, the second gasoline liquid level line is greater than or equal to the gasoline threshold and the remaining cruising range is less than a preset cruising range threshold, control the target engine to switch from the methanol mode to the gasoline mode.

[0023] Further, after the step of obtaining the first engine water temperature and the first gasoline liquid level line when the target engine is in the starting stage according to the start instruction, the method further includes:

[0024] When the first engine water temperature is greater than or equal to the temperature threshold, obtain the third methanol liquid level line;

[0025] When the third methanol liquid level line is less than the methanol threshold and the first gasoline liquid level line is greater than or equal to the gasoline threshold, control the target engine to enter the gasoline mode.

[0026] Further, after the step of controlling the target engine to switch from the methanol mode to the gasoline mode, the method further includes:

[0027] Obtain the third gasoline liquid level line of the target engine in the gasoline mode;

[0028] When the third gasoline liquid level line is less than the gasoline threshold and a shutdown instruction is received, control the target engine to perform a forced shutdown operation.

[0029] In addition, to achieve the above object, the present invention also provides a device for switching engine modes, the device includes:

[0030] The first switching module is configured to receive a start instruction, obtain a first engine water temperature and a first gasoline liquid level line when the target engine is in the start-up stage according to the start instruction, and control the target engine to enter the gasoline mode when it is determined that the first engine water temperature is less than a preset temperature threshold and the first gasoline liquid level line is greater than or equal to a preset gasoline threshold;

[0031] The second switching module is configured to obtain a second engine water temperature, a gasoline mode operation time and a first methanol liquid level line of the target engine in the gasoline mode, and control the target engine to switch from the gasoline mode to the methanol mode when the second engine water temperature is greater than or equal to the temperature threshold, the gasoline mode operation time is greater than or equal to a preset operation time threshold, and the first methanol liquid level line is greater than or equal to a preset methanol threshold;

[0032] The third switching module is configured to obtain a second methanol liquid level line, a second gasoline liquid level line and a remaining cruising range of the target engine in the methanol mode, and control the target engine to switch from the methanol mode to the gasoline mode when the second methanol liquid level line is less than the methanol threshold, the second gasoline liquid level line is greater than or equal to the gasoline threshold, and the remaining cruising range is less than a preset cruising range threshold;

[0033] The fourth switching module is configured to obtain a third gasoline liquid level line of the target engine in the gasoline mode, and control the target engine to switch from the gasoline mode to the gasoline forced mode when the third gasoline liquid level line is less than the gasoline threshold.

[0034] In addition, to achieve the above object, the present invention further provides a terminal device, which includes: a memory, a processor, and a switching program for the engine mode stored on the memory and executable on the processor. When the switching program for the engine mode is executed by the processor, the steps of the engine mode switching method as described above are implemented.

[0035] In addition, to achieve the above object, the present invention further provides a computer-readable storage medium, on which a switching program for the engine mode is stored. When the switching program for the engine mode is executed by a processor, the steps of the engine mode switching method as described above are implemented.

[0036] The engine mode switching method, device, terminal device and computer-readable storage medium provided by the embodiments of the present invention receive a start instruction, obtain a first engine water temperature and a first gasoline liquid level line when the target engine is in the starting stage according to the start instruction, and when it is determined that the first engine water temperature is less than a preset temperature threshold and the first gasoline liquid level line is greater than or equal to a preset gasoline threshold, control the target engine to enter the gasoline mode; obtain a second engine water temperature, a gasoline mode running time and a first methanol liquid level line of the target engine in the gasoline mode, and when the second engine water temperature is greater than or equal to the temperature threshold, the gasoline mode running time is greater than or equal to a preset running time threshold and the first methanol liquid level line is greater than or equal to a preset methanol threshold, control the target engine to switch from the gasoline mode to the methanol mode; obtain a second methanol liquid level line, a second gasoline liquid level line and a remaining cruising range corresponding to the target engine in the methanol mode, and when the second methanol liquid level line is less than the methanol threshold, the second gasoline liquid level line is greater than or equal to the gasoline threshold and the remaining cruising range is less than a preset cruising range threshold, control the target engine to switch from the methanol mode to the gasoline mode; obtain a third gasoline liquid level line of the target engine in the gasoline mode, and when the third gasoline liquid level line is less than the gasoline threshold, control the target engine to switch from the gasoline mode to the gasoline forced mode.

[0037] In this embodiment, when the terminal device is running, it first receives a start instruction sent by the vehicle's vehicle control unit, and controls the temperature sensor configured in the methanol engine to detect the methanol engine according to the start instruction, so as to obtain the first engine water temperature of the methanol engine at startup. At the same time, the terminal device detects the methanol engine through the internally configured detection device to obtain the first gasoline liquid level line corresponding to the methanol engine during the startup phase. When it is determined that the first engine water temperature is lower than the preset temperature threshold and the first gasoline liquid level line is greater than or equal to the preset gasoline threshold, the terminal device controls the methanol engine to enter the gasoline mode and perform a startup operation in the gasoline mode. After that, the terminal device controls the temperature sensor and the detection device to obtain the second engine water temperature, the gasoline mode running time, and the first methanol liquid level line of the methanol engine in the gasoline mode. When the second engine water temperature is higher than the temperature threshold, the gasoline mode running time is greater than the preset running time threshold, and the first methanol liquid level line is greater than or equal to the preset methanol threshold, the terminal device controls the methanol engine to switch from the gasoline mode to the methanol mode and run in the methanol mode. Then, the terminal device controls the temperature sensor and the detection device to obtain the second methanol liquid level line, the second gasoline liquid level line, and the remaining driving range of the methanol engine in the methanol mode. When the second methanol liquid level line is lower than the methanol threshold, the second gasoline liquid level line is greater than or equal to the gasoline threshold, and the remaining driving range is less than the driving range threshold, the terminal device controls the methanol engine to switch from the methanol mode to the gasoline mode and run in the gasoline mode. Finally, the terminal device controls the detection device to obtain the third gasoline liquid level line of the methanol engine in the gasoline mode. When the third gasoline liquid level line is lower than the gasoline threshold, the terminal device controls the methanol engine to switch from the gasoline mode to the gasoline forced mode and run in the gasoline forced mode.

[0038] Thus, when it is determined that the vehicle is in a low-temperature environment, the present invention controls the methanol engine in the vehicle to start through the gasoline mode to increase the engine water temperature, and controls the methanol engine to switch to the methanol mode after the engine water temperature rises to a certain temperature. Furthermore, when the remaining amount of methanol in the methanol engine is low, the methanol engine is controlled to switch back to the gasoline mode. Finally, when the remaining amount of gasoline in the methanol engine is low, the methanol engine is controlled to enter the gasoline forced mode from the gasoline mode. That is, the present invention controls the methanol engine to start in the gasoline mode to increase the engine temperature, and switches to the methanol mode when the engine temperature environment meets the conditions. Furthermore, when the remaining amount of methanol is insufficient, it switches to the gasoline mode, solving the technical problem that when the current vehicle runs in the methanol mode and the methanol fuel runs out, the driver often cannot drive to the nearest refueling station, resulting in the driver having to park and wait for rescue. Thus, the technical effect of enabling the target engine to switch modes in time when the methanol fuel or gasoline fuel is insufficient and improving the vehicle's endurance function is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic structural diagram of a terminal device in the hardware operating environment involved in the solution of an embodiment of the present invention;

[0040] Figure 2 It is a schematic flowchart of the first embodiment of the method for switching the engine mode of the present invention;

[0041] Figure 3 It is a schematic flowchart of the second embodiment of the method for switching the engine mode of the present invention;

[0042] Figure 4 It is a schematic flowchart of the third embodiment of the method for switching the engine mode of the present invention;

[0043] Figure 5 It is a schematic flowchart of the fourth embodiment of the method for switching the engine mode of the present invention;

[0044] Figure 6 It is a detailed schematic flowchart of an embodiment of the method for switching the engine mode of the present invention;

[0045] Figure 7 It is a detailed schematic flowchart of an embodiment of the method for switching the engine mode of the present invention.

[0046] The realization, functional features and advantages of the object of the present invention will be further described in conjunction with the embodiments with reference to the accompanying drawings. Specific Embodiments

[0047] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0048] Referring to Figure 1 , Figure 1 It is a schematic structural diagram of a terminal device in the hardware operating environment involved in the solution of an embodiment of the present invention.

[0049] It should be noted that Figure 1 it can be a schematic structural diagram of the hardware operating environment of the terminal device. The terminal device in the embodiment of the present invention can be a terminal device for executing the method for switching the engine mode provided by the present invention, and the terminal device can specifically be a data storage control terminal, a PC or a portable computer, etc.

[0050] Such as Figure 1As shown in the figure, the terminal device may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard). Optionally, the user interface 1003 may further include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a Wireless-Fidelity (WI-FI) interface). The memory 1005 may be a high-speed Random Access Memory (RAM) memory, or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk memory. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0051] Those skilled in the art can understand that Figure 1 the structure shown in the figure does not constitute a limitation on the terminal device, and it may include more or fewer components than shown in the figure, or combine some components, or have different component arrangements.

[0052] As Figure 1 shown, the memory 1005, as a storage medium, may include an operating system, a data storage module, a network communication module, a user interface module, and a switching program for the engine mode.

[0053] In Figure 1 the terminal device shown, the network interface 1004 is mainly used for data communication with other devices; the user interface 1003 is mainly used for data interaction with users; the processor 1001 and the memory 1005 in the terminal device of the present invention may be disposed in the terminal device. The terminal device calls the switching program for the engine mode stored in the memory 1005 through the processor 1001 and executes the switching method for the engine mode provided by the embodiments of the present invention.

[0054] Based on the above terminal device, various embodiments of the switching method for the engine mode of the present invention are provided.

[0055] Please refer to Figure 2 , Figure 2 which is a schematic flowchart of the first embodiment of the switching method for the engine mode of the present invention.

[0056] It should be understood that although the logical order is shown in the flowchart, in some cases, the method for switching the engine mode of the present invention can of course execute the steps shown or described in a different order than here.

[0057] In this embodiment, the method for switching the engine mode of the present invention may include the following steps:

[0058] Step S10: Receive a start instruction, obtain the first engine water temperature and the first gasoline liquid level line of the target engine when the target engine is in the starting stage according to the start instruction, and when it is determined that the first engine water temperature is less than a preset temperature threshold and the first gasoline liquid level line is greater than or equal to a preset gasoline threshold, control the target engine to enter the gasoline mode;

[0059] In this embodiment, when the terminal device is running, it first receives a start instruction issued by the vehicle control system, and then calls the temperature sensor configured in the terminal device to detect the target engine according to the control instruction to obtain the first engine water temperature of the target engine. At the same time, the terminal device calls the detection device configured inside according to the start instruction to detect the target engine to obtain the first gasoline liquid level line corresponding to the target engine in the starting stage. The terminal device then controls the target engine to enter the gasoline mode to start the engine of the vehicle in the gasoline mode when it is determined that the first engine water temperature is less than the preset temperature threshold and the first gasoline liquid level line is greater than or equal to the preset gasoline threshold.

[0060] Exemplarily, for example, please refer to Figure 6 , Figure 6This is a schematic diagram of the detailed process involved in an embodiment of the engine mode switching method of the present invention. When the terminal device is running, it first receives the start command sent by the VCU (Vehicle Control Unit) device configured in the vehicle through the internally integrated EMS (Engine Management System). When receiving the start command, the terminal device controls the temperature sensor configured in the terminal device to detect the methanol engine of the vehicle through the EMS, so as to determine the first engine water temperature when the methanol engine is in the start state. At the same time, the terminal device controls the detection device to detect the gasoline fuel storage bin storing gasoline fuel in the methanol engine through the EMS, so as to determine the first gasoline liquid level line when the methanol engine is in the start state. After that, the terminal device reads the storage device configured internally to obtain the temperature threshold of 25°C, methanol threshold, and gasoline threshold preset by the technician. The terminal device then inputs the obtained temperature threshold, methanol threshold, and gasoline threshold into the EMS. After that, the terminal device inputs the obtained first gasoline liquid level line into the EMS. Finally, the EMS first compares the obtained first engine water temperature with the temperature threshold, and when it is determined that the first engine water temperature is less than 25°C, it further compares the obtained first gasoline liquid level line with the gasoline threshold. When the EMS determines that the first gasoline liquid level line is greater than or equal to the gasoline threshold, it controls the methanol engine to enter the gasoline mode to start the engine of the vehicle in the gasoline mode.

[0061] Further, in a feasible embodiment, after the step of "obtaining the first engine water temperature of the target engine according to the start command" in the above step S10, the engine mode switching method of the present invention may further include:

[0062] Step A10: When the first engine water temperature is less than the preset temperature threshold and the first gasoline liquid level line is less than the preset gasoline threshold, control the target energy recovery module to perform an energy recovery operation;

[0063] Step A20: Obtain the third methanol liquid level line when the target engine is in the start stage, and when the first engine water temperature is greater than or equal to the temperature threshold and the third methanol liquid level line is less than the preset methanol threshold, control the target energy recovery module to perform an energy recovery operation;

[0064] Exemplarily, for example, as Figure 6 shown, when the terminal device determines through the EMS that the first engine water temperature is less than 25°C and the first gasoline liquid level line is less than the gasoline threshold, it generates an energy recovery command, and the VCU sends the energy recovery command to the energy recovery module to make the energy recovery module perform the energy recovery operation according to the highest gear corresponding to the recovery command;

[0065] Alternatively,

[0066] The terminal device controls the detection device through the EMS to detect the methanol fuel storage bin storing methanol fuel in the methanol engine to obtain the third methanol liquid level line when the methanol engine is in the starting stage. At the same time, the terminal device reads the storage device to obtain the methanol threshold preset by the technician, and inputs the obtained third methanol liquid level line and methanol threshold into the EMS. After that, when the terminal device determines through the EMS that the first engine water temperature is greater than or equal to 25 °C and the third methanol liquid level line is less than the methanol threshold, the terminal device generates an energy recovery instruction, and sends the energy recovery instruction to the energy recovery module through the VCU, so that the energy recovery module performs the energy recovery operation according to the highest gear corresponding to the recovery instruction.

[0067] Step S20: Obtain the second engine water temperature, gasoline mode operation time and the first methanol liquid level line of the target engine in the gasoline mode, and when the second engine water temperature is greater than or equal to the temperature threshold, the gasoline mode operation time is greater than or equal to the preset operation time threshold, and the first methanol liquid level line is greater than or equal to the preset methanol threshold, control the target engine to switch from the gasoline mode to the methanol mode;

[0068] In this embodiment, when the terminal device determines that the target engine is starting in the gasoline mode, it controls the temperature sensor to detect the target engine again to obtain the second engine water temperature, gasoline mode operation time and the first methanol liquid level line corresponding to the start of the target engine in the gasoline mode. Furthermore, when the terminal device determines that the second engine water temperature is greater than or equal to the temperature threshold, the gasoline mode operation time is greater than or equal to the preset operation time threshold, and the first methanol liquid level is greater than or equal to the methanol threshold, it controls the target engine to switch from the gasoline mode to the methanol mode so that the vehicle runs in the methanol mode.

[0069] Exemplarily, for example, such as Figure 6As shown, when the terminal device determines that the methanol engine is starting in gasoline mode, the terminal device controls the temperature sensor through the EMS to detect the methanol engine again to obtain the second engine water temperature corresponding to the methanol engine when starting in gasoline mode. At the same time, the terminal device controls the detection device through the EMS to detect the methanol fuel storage tank in the methanol engine to obtain the first methanol liquid level line corresponding to the methanol engine in gasoline mode. At the same time, the terminal device controls the timing device through the EMS to detect the methanol engine to record the gasoline mode operation duration of the methanol engine in gasoline mode. After that, the terminal device compares the obtained second engine water temperature with the temperature threshold through the EMS. At the same time, the terminal device compares the obtained first methanol liquid level line with the methanol threshold through the EMS. At the same time, the terminal device compares the gasoline operation duration with the preset duration threshold of 40 s through the EMS. And when the EMS determines that the second engine water temperature is greater than or equal to 25 °C, the first methanol liquid level line is greater than the methanol threshold, and the gasoline mode operation duration is greater than or equal to 40 s, the EMS determines that the current operating conditions of the methanol engine conform to the methanol mode, thereby controlling the methanol engine to switch from gasoline mode to methanol mode so that the vehicle operates in methanol mode.

[0070] Step S30: Obtain the second methanol liquid level line, the second gasoline liquid level line and the remaining cruising range corresponding to the target engine in the methanol mode, and when the second methanol liquid level line is less than the methanol threshold, the second gasoline liquid level line is greater than or equal to the gasoline threshold, and the remaining cruising range is less than the preset cruising range threshold, control the target engine to switch from the methanol mode to the gasoline mode;

[0071] In this embodiment, when the terminal device determines that the target engine enters the methanol mode, it controls the detection device to detect the target engine to obtain the second methanol liquid level line and the second gasoline liquid level line corresponding to the target engine in the methanol mode. The terminal device then calculates the remaining cruising range corresponding to the target engine based on the obtained second methanol liquid level line. When the terminal device determines that the second methanol liquid level line is less than the methanol threshold, the second gasoline liquid level line is greater than or equal to the gasoline threshold, and the remaining cruising range is less than the preset cruising range threshold, it controls the target engine to switch from the methanol mode to the gasoline mode so that the vehicle operates in the gasoline mode.

[0072] Exemplarily, for example, as Figure 6As shown, when the terminal device determines that the methanol engine enters the methanol mode, it uses the EMS control detection device to detect the methanol fuel storage tank and gasoline fuel storage tank in the methanol engine to obtain the second methanol liquid level line and the second gasoline liquid level line when the methanol engine is operating in the methanol mode. At the same time, the terminal device calculates the remaining cruising range corresponding to the methanol engine based on the second methanol liquid level line. After that, the terminal device compares the obtained second methanol liquid level line with the methanol threshold through the EMS. At the same time, the terminal device compares the obtained second gasoline liquid level line with the gasoline threshold through the EMS. At the same time, the terminal device compares the obtained remaining cruising range with the preset cruising range threshold of 30 km through the EMS. Then, when the EMS determines that the second methanol liquid level line is less than the methanol threshold, the second gasoline liquid level line is greater than or equal to the gasoline threshold, and the remaining cruising range is less than 30 km, it controls the methanol engine to switch from the methanol mode to the gasoline mode so that the vehicle continues to operate in the gasoline mode.

[0073] Step S40: Obtain the third gasoline liquid level line of the target engine in the gasoline mode, and when the third gasoline liquid level line is less than the gasoline threshold, control the target engine to switch from the gasoline mode to the gasoline forced mode;

[0074] In this embodiment, as Figure 6 shown, after the terminal device determines that the target engine enters the gasoline mode, it controls the detection device to detect the target engine to obtain the third gasoline liquid level line corresponding to the target engine when it is operating in the gasoline mode, and when it determines that the third gasoline liquid level line is less than the preset gasoline mode, it controls the target engine to switch from the gasoline mode to the gasoline forced mode.

[0075] Exemplarily, for example, after the terminal device determines that the methanol engine enters the gasoline mode, it first uses the EMS to control the detection device to detect the gasoline fuel storage tank again, so as to determine the third gasoline liquid level line corresponding to the methanol engine in the gasoline mode. After that, the terminal device compares the obtained third gasoline liquid level line with the gasoline threshold through the EMS, and when it determines that the third gasoline liquid level line is less than the gasoline threshold, it further determines whether it receives an engine forced start instruction from the VCU device in the vehicle. Then, when the terminal device determines that it receives the engine forced start instruction sent by the VCU device, it controls the methanol engine to switch from the gasoline mode to the gasoline forced mode so that the vehicle operates in the gasoline forced mode.

[0076] Further, in a feasible embodiment, after the above step S40, the method for switching the engine mode of the present invention may further include:

[0077] Step B10: Obtain the first power reduction rate and the first power reduction duration of the target engine in the gasoline forced mode;

[0078] In this embodiment, when the terminal device determines that the target engine enters the gasoline forced mode, it first controls the detection device to detect the target engine to obtain the first power reduction rate of the target engine in the gasoline forced mode. At the same time, when the terminal device determines that the power corresponding to the target engine decreases, it controls the timing device to detect the target engine to obtain the first power reduction duration corresponding to the first power reduction rate.

[0079] Step B20: When the first power reduction rate is greater than or equal to a preset power reduction threshold and the first power reduction duration is greater than or equal to a preset reduction time threshold, control the target engine to switch from the gasoline forced mode to the methanol forced mode;

[0080] In this embodiment, the terminal device reads the storage device to obtain the power reduction threshold and the reduction time threshold preset by the technician. When the terminal device determines that the obtained first power reduction rate is greater than or equal to the power reduction rate threshold and the first power reduction duration is greater than or equal to the reduction time threshold, the terminal device determines that the gasoline fuel in the target engine is about to run out, and thus controls the target engine to switch from the gasoline forced mode to the methanol forced mode so that the vehicle runs in the methanol forced mode.

[0081] Exemplarily, for example, as Figure 6 shown, when the terminal device determines that the methanol engine enters the gasoline forced mode, it first determines the standard engine power corresponding to the methanol engine in the forced start state according to the engine forced start instruction sent by the VCU device. At the same time, the terminal device controls the detection device to detect the methanol engine through the EMS to obtain the first target engine power of the methanol engine in the gasoline forced mode, and then calculates the first power reduction rate corresponding to the methanol engine according to the standard engine power and the first target engine power. The terminal device further calls the timing device to detect the methanol engine through the EMS to obtain the duration of the first power reduction rate so as to obtain the first power reduction duration. After that, the terminal device reads the storage device to obtain the power reduction rate threshold of 50% and the reduction time threshold of 5 s preset by the technician. The terminal device compares the obtained first power reduction rate with the power reduction rate threshold through the EMS, and at the same time, compares the first power reduction duration with the reduction time threshold. Then, when the terminal device determines that the first power reduction rate is greater than or equal to 50% and the first power reduction duration is greater than or equal to 5 s, the terminal device determines that the gasoline fuel is about to run out, and further controls the methanol engine to switch from the gasoline forced mode to the methanol forced mode so that the vehicle runs in the methanol forced mode.

[0082] Furthermore, in a feasible embodiment, after the above step B20, the engine mode switching method of the present invention may further include:

[0083] Step C10: obtaining a second power reduction rate and a second power reduction duration of the target engine in the methanol forced mode;

[0084] In this embodiment, when the terminal device determines that the target engine enters the methanol forced mode, it first controls the detection device to detect the target engine to obtain the second power reduction rate of the target engine in the methanol forced mode. At the same time, when the terminal device determines that the power corresponding to the target engine is reduced, it controls the timing device to detect the target engine to obtain the second power reduction duration corresponding to the second power reduction rate.

[0085] Step C20: When the second power reduction rate is greater than or equal to the power reduction threshold, and the second power reduction duration is greater than or equal to the reduction time threshold, controlling the target engine to perform a forced shutdown operation;

[0086] In this embodiment, when the terminal device determines that the acquired second power reduction rate is greater than or equal to the power reduction rate threshold, and the second power reduction duration is greater than or equal to the reduction time threshold, the terminal device determines that the methanol fuel in the target engine is about to be exhausted, thereby controlling the target engine to exit the methanol forced mode and perform a forced shutdown operation to gradually decelerate the vehicle until it stops.

[0087] For example, for example, Figure 6 As shown, when the terminal device determines that the methanol engine enters the methanol forced mode, it first determines the standard engine power corresponding to the methanol engine in the forced start state according to the engine forced start instruction sent by the VCU device. At the same time, the terminal device detects the methanol engine through the EMS control detection device to obtain the second target engine power when the methanol engine is in the methanol forced mode, and then calculates the second power reduction rate corresponding to the methanol engine in the methanol forced mode based on the standard engine power and the second target engine power. The terminal device then calls the timing device through the EMS to detect the methanol engine to obtain the duration of the second power reduction rate and thus obtain the second power reduction duration. Thereafter, the terminal device compares the obtained second power reduction rate with the power reduction threshold through the EMS. At the same time, the terminal device compares the obtained second power reduction duration with the reduction time threshold through the EMS. Then, when the terminal device determines that the second power reduction rate is greater than or equal to 50% and the second power reduction duration is greater than or equal to 5 seconds, the terminal device determines that the methanol fuel is about to be exhausted, and thus controls the methanol engine to exit the methanol forced mode and perform a forced shutdown operation to gradually decelerate the vehicle until it stops.

[0088] In this embodiment, when the terminal device is running, it first receives a start command issued by the vehicle control system. Then, according to the control command, it calls the temperature sensor configured in the terminal device to detect the target engine to obtain the first engine water temperature of the target engine. At the same time, the terminal device calls the detection device configured inside according to the start command to detect the target engine to obtain the first gasoline liquid level line corresponding to the target engine during the start-up phase. Furthermore, when the terminal device determines that the first engine water temperature is less than the preset temperature threshold and the first gasoline liquid level line is greater than or equal to the preset gasoline threshold, it controls the target engine to enter the gasoline mode to start the engine in the gasoline mode. After that, when the terminal device determines that the target engine is starting in the gasoline mode, it controls the temperature sensor to detect the target engine again to obtain the second engine water temperature, gasoline mode running time, and first methanol liquid level line corresponding to the target engine when starting in the gasoline mode. Furthermore, when the terminal device determines that the second engine water temperature is greater than or equal to the temperature threshold, the gasoline mode running time is greater than or equal to the preset running time threshold, and the first methanol liquid level is greater than or equal to the methanol threshold, it controls the target engine to switch from the gasoline mode to the methanol mode to make the vehicle run in the methanol mode. Then, when the terminal device determines that the target engine enters the methanol mode, it controls the detection device to detect the target engine to obtain the second methanol liquid level line and the second gasoline liquid level line corresponding to the target engine in the methanol mode. Furthermore, the terminal device calculates the remaining cruising range corresponding to the target engine based on the obtained second methanol liquid level line. When the terminal device determines that the second methanol liquid level line is less than the methanol threshold, the second gasoline liquid level line is greater than or equal to the gasoline threshold, and the remaining cruising range is less than the preset cruising range threshold, it controls the target engine to switch from the methanol mode to the gasoline mode to make the vehicle run in the gasoline mode. Finally, after the terminal device determines that the target engine enters the gasoline mode, it controls the detection device to detect the target engine to obtain the third gasoline liquid level line corresponding to the target engine when running in the gasoline mode, and when it determines that the third gasoline liquid level line is less than the preset gasoline mode, it controls the target engine to switch from the gasoline mode to the gasoline forced mode.

[0089] Thus, when it is determined that the vehicle is in a low-temperature environment, the present invention controls the methanol engine in the vehicle to start in gasoline mode to increase the engine water temperature, and after the engine water temperature rises to a certain temperature, controls the methanol engine to switch to methanol mode for operation. Furthermore, when the remaining amount of methanol in the methanol engine is low, the methanol engine is controlled to switch back to gasoline mode for operation. Finally, when the remaining amount of gasoline in the methanol engine is low, the methanol engine is controlled to enter the gasoline forced mode from the gasoline mode. That is, the present invention controls the methanol engine to start in gasoline mode to increase the engine temperature, and switches to methanol mode for operation when the engine temperature environment reaches the condition. Furthermore, when the remaining amount of methanol is insufficient, it switches to gasoline mode for operation, solving the technical problem that when the current vehicle is operating in methanol mode and the methanol fuel runs out, the driver often cannot drive to the nearest refueling station, and finally the driver can only park in place and wait for rescue, thereby achieving the technical effect of enabling the target engine to switch modes in time when the methanol fuel or gasoline fuel is insufficient, and improving the vehicle's endurance function.

[0090] Further, based on the first embodiment of the method for switching the engine mode of the present invention described above, a second embodiment of the method for switching the engine mode of the present invention is proposed here.

[0091] Please refer to Figure 3 , Figure 3 which is a schematic flowchart of the second embodiment of the method for switching the engine mode of the present invention.

[0092] Based on Figure 2 the first embodiment of the method for switching the engine mode of the present invention shown above, after the step of "acquiring the first engine water temperature of the target engine according to the start instruction" in the above step S10, the method for switching the engine mode of the present invention may further include the following steps:

[0093] Step D10: When the first engine water temperature is greater than or equal to the temperature threshold and the third methanol liquid level line is greater than the methanol threshold, control the target engine to enter methanol mode;

[0094] In this embodiment, after the terminal device acquires the first engine water temperature of the target engine, it controls the detection device to detect the target engine to acquire the third methanol liquid level line corresponding to the target engine during the start-up stage. Furthermore, when it is determined that the first engine water temperature is greater than or equal to the preset temperature threshold and the third methanol liquid level line is greater than the methanol threshold, the target engine is controlled to enter methanol mode to start the engine of the vehicle in methanol mode.

[0095] Step D20: Obtain the second methanol liquid level line, the second gasoline liquid level line, and the remaining cruising range corresponding to the target engine in the methanol mode. When the second methanol liquid level line is less than the methanol threshold, the second gasoline liquid level line is greater than or equal to the gasoline threshold, and the remaining cruising range is less than the preset cruising range threshold, control the target engine to switch from the methanol mode to the gasoline mode;

[0096] In this embodiment, when the terminal device determines that the target engine is started in the methanol mode, it controls the temperature sensor to detect the target engine again to obtain the second methanol liquid level line, the second gasoline liquid level line, and the remaining cruising range corresponding to the target engine when it operates in the methanol mode. When the terminal device determines that the second methanol liquid level line is less than the methanol threshold, the second gasoline liquid level line is greater than or equal to the gasoline threshold, and the remaining cruising range is less than the preset cruising range threshold, it controls the target engine to switch from the methanol mode to the gasoline mode so that the vehicle operates in the gasoline mode.

[0097] Exemplarily, for example, as Figure 6 shown, after the terminal device obtains the first engine water temperature corresponding to the methanol engine in the start-up phase, it reads the internally configured storage device to obtain the temperature threshold of 25°C, the methanol threshold, and the gasoline threshold preset by the technician. Then, the terminal device inputs the obtained temperature threshold, methanol threshold, and gasoline threshold into the EMS. After that, the terminal device controls the detection device through the EMS to detect the methanol fuel storage bin in the methanol engine to obtain the third methanol liquid level line corresponding to the methanol engine in the start-up phase. Then, the terminal device compares the obtained first engine water temperature with the temperature threshold through the EMS. At the same time, the terminal device compares the obtained third methanol liquid level line with the methanol threshold through the EMS, and when it determines that the first engine water temperature is greater than or equal to 25°C and the third methanol liquid level line is greater than or equal to the methanol threshold, it controls the methanol engine to enter the methanol mode and perform the engine start-up operation;

[0098] After that, when the terminal device determines that the methanol engine enters the methanol mode, it uses the EMS control detection device to detect the methanol engine again to obtain the second methanol liquid level line and the second gasoline liquid level line when the methanol engine is operating in the methanol mode. At the same time, the terminal device calculates the remaining cruising range of the methanol engine in the methanol mode based on the obtained second methanol liquid level line. Then, the terminal device compares the obtained second methanol liquid level line with the methanol threshold through the EMS. At the same time, the terminal device compares the obtained second gasoline liquid level line with the gasoline threshold through the EMS. At the same time, the terminal device compares the obtained remaining cruising range with the cruising range threshold of 30 km through the EMS. Furthermore, when it is determined that the second methanol liquid level line is less than the methanol threshold, the second gasoline liquid level line is greater than or equal to the gasoline threshold, and the remaining cruising range is less than 30 km, the terminal device controls the methanol engine to switch from the methanol mode to the gasoline mode to make the vehicle operate in the gasoline mode.

[0099] In this embodiment, after the terminal device obtains the first engine water temperature of the target engine, it controls the detection device to detect the target engine to obtain the third methanol liquid level line corresponding to the target engine during the starting stage. Furthermore, when it is determined that the first engine water temperature is greater than or equal to the preset temperature threshold and the third methanol liquid level line is greater than the methanol threshold, the terminal device controls the target engine to enter the methanol mode to start the engine in the methanol mode. After that, when the terminal device determines that the target engine is starting in the methanol mode, it controls the temperature sensor to detect the target engine again to obtain the second methanol liquid level line, the second gasoline liquid level line, and the remaining cruising range corresponding to the target engine when it is operating in the methanol mode. When the terminal device determines that the second methanol liquid level line is less than the methanol threshold, the second gasoline liquid level line is greater than or equal to the gasoline threshold, and the remaining cruising range is less than the preset cruising range threshold, the terminal device controls the target engine to switch from the methanol mode to the gasoline mode to make the vehicle operate in the gasoline mode.

[0100] In this way, the present invention adopts the method of directly entering the methanol mode to start the engine and controlling the methanol engine to keep running in the methanol mode when it is determined that the methanol engine can make the methanol fuel reach the ignition state and the remaining amount of methanol fuel is relatively large, until the remaining amount of methanol fuel is low enough to switch to the gasoline mode for operation, achieving the purpose that the methanol engine can directly enter the methanol mode in a high-temperature environment and perform the starting and keeping-running operations, and can timely switch to the gasoline mode to maintain the vehicle's cruising range when the remaining amount of methanol fuel is insufficient.

[0101] Furthermore, based on the second embodiment of the engine mode switching method of the present invention above, the third embodiment of the engine mode switching method of the present invention is proposed here.

[0102] Please refer to Figure 4 , Figure 4Schematic flow chart of the third embodiment of the engine mode switching method of the present invention.

[0103] Based on Figure 3 In the second embodiment of the engine mode switching method of the present invention shown above, after the step of "acquiring the first engine water temperature of the target engine according to the start instruction" in the above step S10, the engine mode switching method of the present invention may further include the following steps:

[0104] Step E10: When the first engine water temperature is greater than or equal to the temperature threshold, acquire the third methanol liquid level line;

[0105] In this embodiment, when the terminal device determines that the acquired first engine water temperature is greater than or equal to the temperature threshold, it controls the detection device to detect the target engine to acquire the third methanol liquid level line corresponding to the methanol engine during the start-up phase.

[0106] Step E20: When the third methanol liquid level line is less than the methanol threshold and the first gasoline liquid level line is greater than or equal to the gasoline threshold, control the target engine to enter the gasoline mode;

[0107] In this embodiment, when the terminal device determines that the acquired third methanol liquid level line is less than the methanol threshold, it further controls the detection device to detect the target engine to acquire the first gasoline liquid level line of the target engine during start-up, and when it determines that the first gasoline liquid level line is greater than or equal to the gasoline threshold, it controls the target engine to enter the gasoline mode to perform the start-up operation.

[0108] Exemplarily, for example, as Figure 6 shown, when the terminal device determines that the acquired first engine water temperature is greater than or equal to 25 °C, it controls the detection device to detect the methanol engine through the EMS to acquire the third methanol liquid level line of the methanol fuel storage tank during the engine start-up phase. Then, the terminal device compares the acquired third methanol liquid level line with the methanol threshold through the EMS, and when it determines that the third methanol liquid level line is less than the methanol threshold, it further controls the detection device to detect the methanol engine to acquire the first gasoline liquid level line corresponding to the gasoline fuel storage tank in the methanol engine during the engine start-up phase. After that, the terminal device compares the acquired first gasoline liquid level line with the gasoline threshold through the EMS, and when it determines that the first gasoline liquid level line is greater than or equal to the gasoline threshold, it controls the methanol engine to enter the gasoline mode to start the engine of the vehicle in the gasoline mode.

[0109] In this embodiment, when the terminal device determines that the first engine water temperature obtained is greater than or equal to the temperature threshold, it controls the detection device to detect the target engine to obtain the third methanol liquid level line corresponding to the methanol engine during the startup phase. After that, when the terminal device determines that the obtained third methanol liquid level line is less than the methanol threshold, it further controls the detection device to detect the target engine to obtain the first gasoline liquid level line of the target engine at startup, and when it determines that the first gasoline liquid level line is greater than or equal to the gasoline threshold, it controls the target engine to enter the gasoline mode to perform the startup operation.

[0110] In this way, the present invention adopts the method of controlling the methanol engine to enter the gasoline mode to perform the startup operation when it is determined that the temperature environment where the methanol engine starts is relatively high, but the remaining amount of methanol fuel in the methanol engine is relatively low, achieving the purpose of directly starting the target engine through the gasoline mode when the methanol fuel is insufficient, thereby saving methanol fuel to improve the vehicle's endurance.

[0111] Further, based on the third embodiment of the method for switching the engine mode of the present invention described above, a fourth embodiment of the method for switching the engine mode of the present invention is proposed here.

[0112] Please refer to Figure 5 , Figure 5 which is a schematic flowchart of the fourth embodiment of the method for switching the engine mode of the present invention.

[0113] Based on Figure 2 the first embodiment of the method for switching the engine mode of the present invention shown, after the step of "controlling the target engine to switch from the methanol mode to the gasoline mode" in the above step S30, the method for switching the engine mode of the present invention may further include the following steps:

[0114] Step F10: Obtain the third gasoline liquid level line of the target engine in the gasoline mode;

[0115] In this embodiment, after the terminal device determines that the target engine enters the gasoline mode, it detects the target engine through the test device to obtain the third gasoline liquid level line corresponding to the target engine in the gasoline mode.

[0116] Step F20: When the third gasoline liquid level line is less than the gasoline threshold and a shutdown instruction is received, control the target engine to perform a forced shutdown operation;

[0117] In this embodiment, when the terminal device determines that the obtained third gasoline liquid level line is less than the preset gasoline threshold, it further detects whether a shutdown instruction sent by the vehicle control device is received. When the terminal device determines that the shutdown instruction is received, it controls the target engine to exit the gasoline mode and perform a forced shutdown operation.

[0118] Exemplarily, for example, as Figure 6 shown, after the terminal device determines that the methanol engine enters the gasoline mode, the terminal device calls the detection device through the EMS to detect the methanol engine to determine the third gasoline liquid level line corresponding to the gasoline fuel storage bin in the methanol engine during the engine startup stage. At the same time, the terminal device reads the storage device to obtain the gasoline threshold. After that, the terminal device compares the obtained third gasoline liquid level line with the gasoline threshold through the EMS, and when it determines that the third gasoline liquid level line is less than the gasoline threshold, it further detects whether any of the instructions sent by the VCU device contains a shutdown instruction. After that, when the terminal device determines that any of the instructions sent by the VCU device contains a shutdown instruction, the terminal device controls the methanol engine to exit the gasoline mode and perform a forced shutdown operation to gradually decelerate the vehicle until it stops.

[0119] In addition, the present invention also provides a switching device for an engine mode. Please refer to Figure 7 , Figure 7 which is a schematic diagram of functional modules related to an embodiment of the switching method for the engine mode of the present invention. As Figure 7 shown, the switching device for the engine mode of the present invention includes:

[0120] A first switching module 10, configured to receive a startup instruction, obtain a first engine water temperature and a first gasoline liquid level line of a target engine during the startup stage according to the startup instruction, and control the target engine to enter the gasoline mode when it is determined that the first engine water temperature is less than a preset temperature threshold and the first gasoline liquid level line is greater than or equal to a preset gasoline threshold;

[0121] A second switching module 20, configured to obtain a second engine water temperature, a gasoline mode operation time, and a first methanol liquid level line of the target engine in the gasoline mode, and control the target engine to switch from the gasoline mode to the methanol mode when the second engine water temperature is greater than or equal to the temperature threshold, the gasoline mode operation time is greater than or equal to a preset operation time threshold, and the first methanol liquid level line is greater than or equal to a preset methanol threshold;

[0122] A third switching module 30, configured to obtain a second methanol liquid level line, a second gasoline liquid level line, and a remaining cruising range of the target engine in the methanol mode, and control the target engine to switch from the methanol mode to the gasoline mode when the second methanol liquid level line is less than the methanol threshold, the second gasoline liquid level line is greater than or equal to the gasoline threshold, and the remaining cruising range is less than a preset cruising range threshold;

[0123] The fourth switching module 40 is configured to obtain the third gasoline liquid level line of the target engine in the gasoline mode, and when the third gasoline liquid level line is less than the gasoline threshold, control the target engine to switch from the gasoline mode to the gasoline forced mode.

[0124] Further, the fourth switching module 40 includes:

[0125] The first parameter acquisition unit is configured to acquire the first power reduction rate and the first power reduction duration of the target engine in the gasoline forced mode;

[0126] The first endurance switching unit is configured to, when the first power reduction rate is greater than or equal to a preset power reduction threshold and the first power reduction duration is greater than or equal to a preset reduction time threshold, control the target engine to switch from the gasoline forced mode to the methanol forced mode.

[0127] Further, the fourth switching module 40 further includes:

[0128] The second parameter acquisition unit is configured to acquire the second power reduction rate and the second power reduction duration of the target engine in the methanol forced mode;

[0129] The second endurance switching unit is configured to, when the second power reduction rate is greater than or equal to the power reduction threshold and the second power reduction duration is greater than or equal to the reduction time threshold, control the target engine to perform a forced shutdown operation.

[0130] Further, the first switching module 10 includes:

[0131] The first energy recovery unit is configured to, when the first engine water temperature is less than a preset temperature threshold and the first gasoline liquid level line is less than a preset gasoline threshold, control the target energy recovery module to perform an energy recovery operation;

[0132] The second energy recovery unit is configured to acquire the third methanol liquid level line when the target engine is in the starting stage, and when the first engine water temperature is greater than or equal to the temperature threshold and the third methanol liquid level line is less than a preset methanol threshold, control the target energy recovery module to perform an energy recovery operation.

[0133] Further, the first switching module 10 further includes:

[0134] The first mode switching unit is configured to, when the first engine water temperature is greater than or equal to the temperature threshold and the third methanol liquid level line is greater than the methanol threshold, control the target engine to enter the methanol mode;

[0135] A second mode switching unit, configured to obtain a second methanol liquid level line, a second gasoline liquid level line, and a remaining cruising range corresponding to the target engine in the methanol mode, and control the target engine to switch from the methanol mode to the gasoline mode when the second methanol liquid level line is less than the methanol threshold, the second gasoline liquid level line is greater than or equal to the gasoline threshold, and the remaining cruising range is less than a preset cruising range threshold.

[0136] Further, the first switching module 10 further includes:

[0137] A third parameter obtaining unit, configured to obtain the third methanol liquid level line when the first engine water temperature is greater than or equal to the temperature threshold;

[0138] A third mode switching unit, configured to control the target engine to enter the gasoline mode when the third methanol liquid level line is less than the methanol threshold and the first gasoline liquid level line is greater than or equal to the gasoline threshold.

[0139] Further, the third switching module 30 includes:

[0140] A fourth parameter obtaining unit, configured to obtain a third gasoline liquid level line of the target engine in the gasoline mode;

[0141] A forced shutdown execution unit, configured to control the target engine to perform a forced shutdown operation when the third gasoline liquid level line is less than the gasoline threshold and a shutdown instruction is received.

[0142] In addition, the present invention further provides a terminal device, on which there is a switching program for the engine mode that can run on a processor. When the terminal device executes the switching program for the engine mode, the steps of the method for switching the engine mode described in any one of the above embodiments are implemented.

[0143] The specific embodiments of the terminal device of the present invention are basically the same as those of the above embodiments of the method for switching the engine mode, and will not be described in detail here.

[0144] In addition, the present invention further provides a computer-readable storage medium, on which there is a switching program for the engine mode. When the switching program for the engine mode is executed by a processor, the steps of the method for switching the engine mode described in any one of the above embodiments are implemented.

[0145] The specific embodiments of the computer-readable storage medium of the present invention are basically the same as those of the above embodiments of the method for switching the engine mode, and will not be described in detail here.

[0146] It should be noted that, in this document, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or system comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or system. Without further limitation, an element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the process, method, article or system comprising such element.

[0147] The serial numbers of the above embodiments of the present invention are for description only and do not represent the superiority or inferiority of the embodiments.

[0148] From the description of the above embodiments, those skilled in the art can clearly understand that the above-described embodiment methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art can be embodied in the form of a software product. This computer software product is stored in a storage medium as described above (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to enable a terminal device (which can be a terminal device for executing the engine mode switching method provided by the present invention, and the terminal device can specifically be a data storage control terminal, a PC or a portable computer, etc.) to execute the methods described in various embodiments of the present invention.

[0149] The above are only the preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or equivalent process transformation made by using the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A method for switching engine modes, characterized in that, The method for switching the engine mode includes the following steps: Receive a start instruction, obtain the first engine water temperature and the first gasoline liquid level line when the target engine is in the starting stage according to the start instruction, and when it is determined that the first engine water temperature is less than a preset temperature threshold and the first gasoline liquid level line is greater than or equal to a preset gasoline threshold, control the target engine to enter the gasoline mode; Obtain the second engine water temperature, the gasoline mode operation time, and the first methanol liquid level line of the target engine in the gasoline mode, and when the second engine water temperature is greater than or equal to the temperature threshold, the gasoline mode operation time is greater than or equal to a preset operation time threshold, and the first methanol liquid level line is greater than or equal to a preset methanol threshold, control the target engine to switch from the gasoline mode to the methanol mode; Obtain the second methanol liquid level line, the second gasoline liquid level line, and the remaining cruising range of the target engine in the methanol mode, and when the second methanol liquid level line is less than the methanol threshold, the second gasoline liquid level line is greater than or equal to the gasoline threshold, and the remaining cruising range is less than a preset cruising range threshold, control the target engine to switch from the methanol mode to the gasoline mode; Obtain the third gasoline liquid level line of the target engine in the gasoline mode, and when the third gasoline liquid level line is less than the gasoline threshold and an engine forced start instruction is received, control the target engine to switch from the gasoline mode to the gasoline forced mode.

2. The method for switching the engine mode according to claim 1, characterized in that After the step of controlling the target engine to switch from the gasoline mode to the gasoline forced mode, the method further includes: Obtain the first power reduction rate and the first power reduction duration of the target engine in the gasoline forced mode; When the first power reduction rate is greater than or equal to a preset power reduction threshold and the first power reduction duration is greater than or equal to a preset reduction time threshold, control the target engine to switch from the gasoline forced mode to the methanol forced mode.

3. The method for switching the engine mode according to claim 2, wherein, After the step of controlling the target engine to switch from the gasoline forced mode to the methanol forced mode, the method further includes: Obtain the second power reduction rate and the second power reduction duration of the target engine in the methanol forced mode; When the second power reduction rate is greater than or equal to the power reduction threshold and the second power reduction duration is greater than or equal to the reduction time threshold, control the target engine to perform a forced shutdown operation.

4. The method for switching the engine mode according to claim 1, wherein, After the step of obtaining the first engine water temperature and the first gasoline liquid level line when the target engine is in the starting stage according to the start instruction, the method further includes: When the first engine water temperature is less than a preset temperature threshold and the first gasoline liquid level line is less than a preset gasoline threshold, control the target energy recovery module to perform an energy recovery operation; Or, Obtain the third methanol liquid level line when the target engine is in the starting stage, and when the first engine water temperature is greater than or equal to the temperature threshold and the third methanol liquid level line is less than a preset methanol threshold, control the target energy recovery module to perform energy recovery operation.

5. The method for switching the engine mode according to claim 4, wherein, After the step of obtaining the first engine water temperature and the first gasoline liquid level line when the target engine is in the starting stage according to the start instruction, the method further includes: When the first engine water temperature is greater than or equal to the temperature threshold and the third methanol liquid level line is greater than the methanol threshold, control the target engine to enter the methanol mode; Obtain the second methanol liquid level line, the second gasoline liquid level line and the remaining cruising range corresponding to the target engine in the methanol mode, and when the second methanol liquid level line is less than the methanol threshold, the second gasoline liquid level line is greater than or equal to the gasoline threshold and the remaining cruising range is less than a preset cruising range threshold, control the target engine to switch from the methanol mode to the gasoline mode.

6. The method for switching the engine mode according to claim 5, wherein After the step of obtaining the first engine water temperature and the first gasoline liquid level line when the target engine is in the starting stage according to the start instruction, the method further includes: When the first engine water temperature is greater than or equal to the temperature threshold, obtain the third methanol liquid level line; When the third methanol liquid level line is less than the methanol threshold and the first gasoline liquid level line is greater than or equal to the gasoline threshold, control the target engine to enter the gasoline mode.

7. The method for switching the engine mode according to claim 1, characterized in that, After the step of controlling the target engine to switch from the methanol mode to the gasoline mode, the method further includes: Obtain the third gasoline liquid level line of the target engine in the gasoline mode; When the third gasoline liquid level line is less than the gasoline threshold and a shutdown instruction is received, control the target engine to perform a forced shutdown operation.

8. A switching device for engine modes, characterized in that, The device includes: A first switching module, configured to receive a start instruction, obtain the first engine water temperature and the first gasoline liquid level line when the target engine is in the starting stage according to the start instruction, and when it is determined that the first engine water temperature is less than a preset temperature threshold and the first gasoline liquid level line is greater than or equal to a preset gasoline threshold, control the target engine to enter the gasoline mode; A second switching module, configured to obtain the second engine water temperature, the gasoline mode running time and the first methanol liquid level line of the target engine in the gasoline mode, and when the second engine water temperature is greater than or equal to the temperature threshold, the gasoline mode running time is greater than or equal to a preset running time threshold and the first methanol liquid level line is greater than or equal to a preset methanol threshold, control the target engine to switch from the gasoline mode to the methanol mode; A third switching module, configured to obtain a second methanol liquid level line, a second gasoline liquid level line, and a remaining cruising range corresponding to the target engine in the methanol mode, and control the target engine to switch from the methanol mode to the gasoline mode when the second methanol liquid level line is less than the methanol threshold, the second gasoline liquid level line is greater than or equal to the gasoline threshold, and the remaining cruising range is less than a preset cruising range threshold; A fourth switching module, configured to obtain a third gasoline liquid level line of the target engine in the gasoline mode, and control the target engine to switch from the gasoline mode to the gasoline forced mode when the third gasoline liquid level line is less than the gasoline threshold and an engine forced start instruction is received.

9. A terminal device, characterized in that, The terminal device includes: a memory, a processor, and an engine mode switching program stored on the memory and executable on the processor. When the engine mode switching program is executed by the processor, the steps of the engine mode switching method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that, An engine mode switching program is stored on the computer-readable storage medium. When the engine mode switching program is executed by the processor, the steps of the engine mode switching method according to any one of claims 1 to 7 are implemented.

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