All-terrain vehicle and starting method thereof

Abstract

The invention provides an all-terrain vehicle and a starting method thereof, the all-terrain vehicle comprises a vehicle body, wheels, a control system, a power system and a power control system, and the power control system comprises a whole vehicle controller, an engine controller and a generator controller; the generator is used for driving the power system to rotate; the vehicle control unit is used for sending a power system starting request instruction to the engine controller and the generator controller when the temperature of the power system is lower than a first preset temperature, and synchronously sending an oil injection instruction to the engine controller; the generator controller controls the generator to drive the power system to rotate after receiving the power system starting request instruction; and after the engine controller receives the power system starting request instruction and the oil injection instruction, the power system is controlled to inject oil. The starting success rate of the all-terrain vehicle can be increased in the low-temperature environment, the starting time is shortened, and meanwhile the manufacturing cost of the all-terrain vehicle is not increased.

Description

Technical Field

[0001] The present application relates to the field of vehicle design, and in particular to an all-terrain vehicle and a starting method thereof. Background Art

[0002] With the development of the global new energy vehicle industry, considering that power batteries have not yet made breakthrough progress, the range-extending technology route has been accepted by more and more OEMs and the market. The traditional range extender is composed of an engine and a generator. Generally speaking, the engine start of the range-extended vehicle is provided with energy by the power battery. After the generator receives the start command and the generator target speed sent by the vehicle controller, it reverses and drags the engine to the target speed, then injects fuel into the engine to start the engine. However, all-terrain vehicles are often used at temperatures of minus 20 degrees Celsius or even lower. If only the above-mentioned start control strategy is used, the engine start time may be too long or even unable to start during actual use, resulting in excessive vehicle emissions and poor user experience.

[0003] In the related art, a combustion-supporting controller is added to start the engine by injecting combustion-supporting gas according to the engine water temperature, internal air pressure and injection mode instructions sent by the vehicle controller in a low-temperature environment. However, this method increases the manufacturing cost of the all-terrain vehicle and takes a long time to start the engine. Summary of the invention

[0004] In view of this, the present application provides an all-terrain vehicle and a starting method thereof, which can improve the success rate of starting the all-terrain vehicle in a low temperature environment, reduce the starting time, and do not increase the manufacturing cost of the all-terrain vehicle.

[0005] The embodiment of the present application provides an all-terrain vehicle, comprising: a vehicle body; wheels, including front wheels and rear wheels; a control system, supported by the vehicle body, and used to control the power on and off of the all-terrain vehicle; a power system, supported by the vehicle body, and used to provide power for the all-terrain vehicle, and at least one of the front wheels and the rear wheels is connected to the power system; the all-terrain vehicle also includes: a generator, which is used to drive the power system to rotate; a power control system, which is used for power control of the power system; the power control system includes a vehicle controller, an engine controller and a generator controller; the vehicle controller is used to send a power system start request instruction to the engine controller and the generator controller when the temperature of the power system is less than a first preset temperature, and synchronously send an injection instruction to the engine controller; after receiving the power system start request instruction, the generator controller controls the generator to drive the power system to rotate; after receiving the power system start request instruction and the injection instruction, the engine controller controls the power system to inject fuel.

[0006] Compared with the prior art, the embodiments of the present application have at least the following advantages:

[0007] When the temperature of the power system is lower than the first preset temperature, that is, the power system is in a low temperature environment, the vehicle controller sends a power system start request instruction to the engine controller and the generator controller respectively, and simultaneously sends a fuel injection instruction to the engine controller. Since the generator controller controls the generator to drive the power system to rotate after receiving the power system start request instruction, the engine controller controls the power system to inject fuel after receiving the power system start request instruction and the fuel injection instruction. In this way, the power system can quickly reach the target speed and then start quickly, which improves the success rate of the all-terrain vehicle start and reduces the start time of the all-terrain vehicle in a low temperature environment. In addition, since the entire start process does not require additional parts, the manufacturing cost of the all-terrain vehicle is not increased.

[0008] In some possible implementations, the power control system also includes a power mode switch, which is connected to the vehicle controller; the power mode switch is used to respond to the user's power mode selection and send power mode selection information to the vehicle controller; the vehicle controller is used to: when the all-terrain vehicle is in a stopped state, make a preliminary start-up judgment of the power system based on the power mode selection information; after determining that the power system is initially started successfully, make a power system start-up permission judgment; after determining that the power system is allowed to start, when the temperature of the power system is less than a first preset temperature, send a power system start-up request instruction to the engine controller and the generator controller, and synchronously send a fuel injection instruction to the engine controller.

[0009] In some possible implementations, the power mode selection information includes selecting a hybrid mode and selecting an electric mode; the preliminary start-up judgment of the power system based on the power mode selection information includes: when the power mode selection information is the selection of the hybrid mode, directly judging that the preliminary start-up of the power system is successful; when the power mode selection information is the selection of the electric mode, judging whether the preliminary start-up of the power system is successful based on whether the state of the all-terrain vehicle satisfies a first preset condition.

[0010] In some possible implementations, the all-terrain vehicle also includes a power battery, which is used to provide power to the generator; the first preset condition includes one of the following or any combination thereof: the speed of the all-terrain vehicle is greater than a first preset speed, the vehicle power requirement of the all-terrain vehicle is less than the maximum discharge power of the power battery, the temperature of the power battery is less than a second preset temperature, the SOC value of the power battery is less than a first preset threshold or the discharge power of the power battery is less than the first preset power.

[0011] In some possible implementations, the all-terrain vehicle also includes a power battery, which is used to provide electricity to the generator; the determination of whether the power system is allowed to start after determining that the power system has initially started successfully includes: after determining that the power system has initially started successfully, the vehicle controller determines whether the power system is allowed to start according to the driving state of the all-terrain vehicle, whether the power system is faulty, and whether the SOC value of the power battery is less than a second preset threshold value; the determination of allowing the power system to start includes: when the all-terrain vehicle is in a moving state, the power system is not faulty, and the SOC value of the power battery is less than the second preset threshold value, determining that the power system is allowed to start.

[0012] In some possible implementations, the power control system further includes a power mode switch, which is connected to the vehicle controller; the power mode switch is used to respond to the user's power mode selection and send power mode selection information to the vehicle controller; the vehicle controller is also used to: when the all-terrain vehicle is in a moving state, perform a preliminary start-up judgment of the power system according to the power mode selection information; after determining that the preliminary start-up of the power system is successful, perform a power system start-up permission judgment; after determining that the power system is allowed to start, perform a power system preliminary shutdown judgment according to the power mode selection information; when it is determined that the preliminary shutdown of the power system is unsuccessful, execute again when the temperature of the power system is less than a first preset temperature, send a power system start request instruction to the engine controller and the generator controller, and synchronously send an injection instruction to the engine controller; when it is determined that the preliminary shutdown of the power system is successful, perform a power system shutdown permission judgment; when it is determined that the power system is not allowed to shut down, execute again when the temperature of the power system is less than the first preset temperature, send a power system start request instruction to the engine controller and the generator controller, and synchronously send an injection instruction to the engine controller.

[0013] In some possible implementations, the power mode selection information includes selecting a hybrid mode and selecting an electric mode; performing a preliminary shutdown judgment of the power system based on the power mode selection information includes: when the power mode selection information is the selection of the electric mode, directly judging that the preliminary shutdown of the power system is successful; when the power mode selection information is the selection of the hybrid mode, judging whether the preliminary shutdown of the power system is successful based on whether the state of the all-terrain vehicle satisfies a second preset condition.

[0014] In some possible implementations, the all-terrain vehicle also includes a power battery, which is used to provide power to the generator; the second preset condition includes one of the following or any combination thereof: the speed of the all-terrain vehicle is less than a second preset speed, the vehicle demand power of the all-terrain vehicle is less than the second preset power, or the SOC value of the power battery is greater than a third preset threshold.

[0015] In some possible implementations, the all-terrain vehicle also includes a power battery, which is used to provide power to the generator; the determination of whether the power system is allowed to shut down includes: if the state of the all-terrain vehicle meets any of the following conditions, determining that the power system is allowed to shut down: the maximum discharge power of the power battery is greater than a third preset power, the SOC value of the power battery is greater than a fourth preset threshold, the temperature of the power battery is greater than a third preset temperature, the power system has no shutdown prohibition request, or the temperature of the power system is greater than a fourth preset temperature.

[0016] The second aspect of the present application also provides a starting method for an all-terrain vehicle, wherein the all-terrain vehicle comprises: a power system for providing power for the all-terrain vehicle; a power control system for power control of the power system, wherein the power system comprises an engine controller and a generator controller; a generator for driving the power system to rotate; the starting method comprises: when the temperature of the power system is lower than a first preset temperature, sending a power system start request instruction to the engine controller and the generator controller; sending a fuel injection instruction to the engine controller; wherein, after receiving the power system start request instruction, the generator controller controls the generator to drive the power system to rotate; and after receiving the power system start request instruction and the fuel injection instruction, the engine controller controls the power system to inject fuel.

[0017] It can be understood that the starting method of the all-terrain vehicle of the second aspect provided above corresponds to the all-terrain vehicle of the first aspect. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding structure provided above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of an all-terrain vehicle provided in one embodiment of the present application;

[0019] Figure 2 A schematic diagram of functional modules of a power control system provided in one embodiment of the present application;

[0020] Figure 3 A first schematic diagram of a method for starting an all-terrain vehicle provided in an embodiment of the present application;

[0021] Figure 4A second flow chart of a method for starting an all-terrain vehicle provided in one embodiment of the present application. DETAILED DESCRIPTION

[0022] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application is described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the implementation methods of the present application and the features in the implementation methods can be combined with each other without conflict.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present application. The described implementations are only part of the implementations of the present application, rather than all the implementations.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0025] It should be further noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0026] The terms "first", "second" and the like in the specification, claims and drawings of the present application are used to distinguish similar objects rather than to describe a specific order or sequence.

[0027] To facilitate understanding, some exemplary descriptions of concepts related to the embodiments of the present application are given below for reference.

[0028] Vehicle Control Unit (VCU): The vehicle controller can monitor the actions of the control modules of the lower components and is responsible for the normal driving of the vehicle, braking energy feedback, vehicle power management, network management, fault diagnosis and processing, vehicle status monitoring, etc. It can ensure that the vehicle works normally and stably with good power and reliability.

[0029] Motor Control Unit (MCU): It can control the rotation state of the motor according to the instructions of the VCU or the collected signals. Generally speaking, the MCU can be separated from the drive motor and connected to the motor through a three-phase line; the MCU can also be directly installed on the drive motor, saving space and reducing costs, but increasing the complexity of maintenance and replacement.

[0030] Generator Control Unit (GCU): It can realize four-quadrant operation control of the motor according to external control instructions, and can switch between the two closed-loop control modes of speed and torque according to control needs. It has built-in overvoltage, overcurrent and other fault detection and processing functions. The generator controller converts the DC power of the all-terrain vehicle's power battery into AC power to drive the motor, communicates with the vehicle controller through the communication system, and controls the speed and power required by the vehicle.

[0031] Engine Control Unit (ECU): It has the function of continuously monitoring and controlling the normal operation of the engine. The engine controller tests and calculates the required air-fuel mixture ratio and engine ignition advance angle according to the input data of various sensors. The engine controller directly controls the fuel supply, fuel injection timing, ignition closing angle, engine idling and the status of other vehicle accessory systems under various operating conditions.

[0032] Battery Management System (BMS): The main function of BMS is to improve battery utilization, prevent overcharge and overdischarge of batteries, extend battery life, and monitor battery status. Generally speaking, it is a system that manages, controls, and uses battery packs.

[0033] Please refer to Figure 1 and Figure 2 As shown, the all-terrain vehicle 100 provided in the embodiment of the present application includes but is not limited to: a vehicle body 101, wheels 102, a control system 103, a power system 104, a power control system 105 and a generator 106. Among them, the wheels 102 include a front wheel 1021 and a rear wheel 1022; the control system 103 is supported by the vehicle body 101 and is used to control the power on and off of the all-terrain vehicle 100; the power system 104 is supported by the vehicle body 101 and is used to provide power for the all-terrain vehicle 100, and at least one of the front wheel 1021 and the rear wheel 1022 is connected to the power system 104; the power control system 105 is used to control the power of the power system 104.

[0034] Please refer again Figure 2The power control system 105 includes a vehicle controller 1051, an engine controller 1052 and a generator controller 1053. The vehicle controller 1051 is used to send a power system start request instruction to the engine controller 1052 and the generator controller 1053 when the temperature of the power system 104 is lower than the first preset temperature, and simultaneously send a fuel injection instruction to the engine controller 1052. After receiving the power system start request instruction, the generator controller 1053 controls the generator 106 to drive the power system 104 to rotate. After receiving the power system start request instruction and the fuel injection instruction, the engine controller 1052 controls the power system 104 to inject fuel.

[0035] For ease of understanding, the following takes the power system 104 as an engine as an example to specifically explain the principle that the power system 104 can be successfully started when the temperature of the power system 104 in this embodiment is less than the first preset temperature:

[0036] When the temperature of the engine 104 is greater than or equal to the first preset temperature, the vehicle controller 1051 sends a power system start request instruction to the engine controller 1052 and the generator controller 1053, and sends the second target speed to the generator controller 1053. After receiving the power system start request instruction, the generator controller 1053 controls the generator 106 to drive the crankshaft of the engine 104 to rotate to the second target speed, and the vehicle controller 1051 sends a fuel injection instruction to the engine controller 1052. After receiving the power system start request instruction and the fuel injection instruction, the engine controller 1052 controls the engine 104 to inject fuel, and the engine 104 starts successfully.

[0037] When the temperature of the engine 104 is lower than the first preset temperature, the generator 106 is difficult to drive the crankshaft of the engine 104 to rotate to the second target speed, for example, it can only drive the crankshaft of the engine 104 to rotate to the first target speed, wherein the first target speed is lower than the second target speed. When the crankshaft of the engine 104 rotates to the first target speed, and then the engine 104 is controlled to inject fuel, the success rate of starting the engine 104 is not high. Therefore, by sending the fuel injection instruction to the engine controller 1052 while the vehicle controller 1051 sends the power system start request instruction to the engine controller 1052 and the generator controller 1053, the engine 104 is equipped with combustion conditions in advance during the process of the generator driving the crankshaft of the engine 104 to rotate, that is, before the speed of the crankshaft of the engine 104 reaches the first target speed. After the speed of the crankshaft of the engine 104 reaches the first target speed, the vehicle controller 1051 sends an ignition instruction to the engine controller 1052, and the engine 104 can be quickly ignited successfully, so that the crankshaft of the engine 104 can drive itself at a low speed, thereby reducing the load of the engine 104, and then the generator 106 can continue to drive the crankshaft of the engine 104 to rotate until it reaches the second target speed and the engine 104 starts successfully.

[0038] Please see again Figure 2 The power control system 105 further includes a power mode switch 1054, which is connected to the vehicle controller 1051. The power mode switch 1054 is used to respond to the user's power mode selection and send power mode selection information to the vehicle controller 1051.

[0039] Specifically, Figure 2 The functional module diagram of the power control system 105 shown in the figure also includes a battery management system 1055, a power mode switch 1054 is connected to the vehicle controller 1051 through a hard wire, and the vehicle controller 1051 spans two CAN buses (i.e. Figure 2 CAN1 and CAN2 as shown), the engine controller 1052 and the generator controller 1053 are connected to the CAN1 bus, and the battery management system 106 is connected to the CAN2 bus.

[0040] In some embodiments, when the all-terrain vehicle 100 is in a stopped state and the temperature of the power system 104 is less than a first preset temperature, the vehicle controller 1051 is used to: perform a preliminary start-up determination of the power system 104 based on the power mode selection information; perform a power system start-up permission determination after determining that the power system 104 has been initially started successfully; after determining that the power system 104 is allowed to start, send a power system start-up request instruction to the engine controller 1052 and the generator controller 1053, and synchronously send a fuel injection instruction to the engine controller 1052.

[0041] It should be noted that in this embodiment, the power system 104 is an engine, and the temperature of the power system 104 is the engine water temperature, that is, the temperature of the coolant.

[0042] It is understandable that the ATV 100 further includes a power battery, which is used to provide power to the generator 106 .

[0043] For ease of understanding, the following takes the case where the power system 104 is an engine and the first preset temperature is minus 20 degrees Celsius as an example to describe in detail the starting process of the all-terrain vehicle 100 in a stopped state:

[0044] 1. The user selects the power mode of the ATV 100 through the power mode switch 1054. For example, the power mode switch 1054 includes a button A and a button B, where button A corresponds to the electric mode and button B corresponds to the hybrid mode. When the user presses button A, the power mode of the ATV 100 is selected as the electric mode, and when the user presses button B, the power mode of the ATV 100 is selected as the hybrid mode. After the user operates the power mode switch 1054, the power mode switch 1054 sends the power mode selection information corresponding to the user operation to the vehicle controller 1051.

[0045] 2. The vehicle controller 1051 performs a preliminary engine start judgment. When the power mode corresponding to the received power mode selection information is the hybrid mode, it is directly judged that the power system 104 is initially started successfully; when the power mode corresponding to the received power mode selection information is the electric mode, it is judged whether the power system is initially started successfully based on whether the state of the all-terrain vehicle 100 meets the first preset condition.

[0046] In some embodiments, the first preset condition is: the speed of the all-terrain vehicle 100 is greater than the first preset speed, or the vehicle power requirement of the all-terrain vehicle 100 is less than the maximum discharge power of the power battery, or the temperature of the power battery is less than the second preset temperature, or the SOC (State of Charge) value of the power battery is less than the first preset threshold, or the discharge power of the power battery is less than the first preset power.

[0047] In some embodiments, there is no specific limitation on the first preset speed, the second preset temperature, the first preset threshold, and the first preset power, and they can be set according to actual needs.

[0048] For example, in this embodiment, the first preset condition can be set as: the speed of the all-terrain vehicle 100 is greater than 80 km / h, or the temperature of the power battery is less than -10°C, or the SOC value of the power battery is less than 20%, or the discharge power of the power battery is less than 40KW.

[0049] 3. After the vehicle controller 1051 determines that the engine is initially started successfully, the vehicle controller 1051 determines whether the power system is allowed to start, that is, the power system is allowed to start according to the driving state of the all-terrain vehicle 100, whether the power system is faulty, and whether the SOC value of the power battery is less than the second preset threshold.

[0050] In some embodiments, when the vehicle controller 1051 detects that the vehicle is in the running mode, the engine 104 has no high-level faults, and the SOC value of the power battery of the all-terrain vehicle 100 is less than 80%, the vehicle controller 1051 determines to allow the engine to start.

[0051] 4. The engine 104 sends the engine water temperature to the vehicle controller 1051. The vehicle controller 1051 receives the engine water temperature and determines the start type. When the engine water temperature is less than -20°C, the engine cold start mode is performed; when the engine water temperature is greater than or equal to -20°C, the engine normal start mode is performed.

[0052] If the engine cold start mode is performed, the vehicle controller 1051 sends the power system start request instruction and the first target speed to the engine controller 1052 and the generator controller 1053, and simultaneously sends the fuel injection instruction to the engine controller 1052. After receiving the power system start request instruction, the generator controller 1053 controls the generator 106 to drive the engine 104 to rotate to the first target speed; after receiving the power system start request instruction and the fuel injection instruction, the engine controller 1052 controls the engine 104 to inject fuel, so that the fuel chamber of the engine 104 has the combustion condition in advance, thereby reducing the load of the engine 104, and then the generator 106 can continue to drive the engine 104 to rotate to the second target speed, and the engine 104 starts successfully.

[0053] If the engine is started in normal mode, the vehicle controller 1051 sends a power system start request instruction to the engine controller 1052 and the generator controller 1053, and sends a second target speed to the generator controller 1053, wherein the second target speed is greater than the first target speed. After receiving the power system start request instruction, the generator controller 1053 controls the generator 106 to drive the engine 104 to rotate to the second target speed, and the vehicle controller 1051 sends a fuel injection instruction to the engine controller 1052. After receiving the power system start request instruction and the fuel injection instruction, the engine controller 1052 controls the engine 104 to inject fuel, and the engine 104 starts successfully.

[0054] Compared with the related art, the embodiment of the present application has at least the following advantages: when the temperature of the power system 104 is lower than the first preset temperature, that is, the power system 104 is in a low temperature environment, the vehicle controller 1051 sends a power system start request instruction to the engine controller 1052 and the generator controller 1053 respectively, and simultaneously sends a fuel injection instruction to the engine controller 1052. Since the generator controller 1053 controls the generator 106 to drive the power system 104 to rotate after receiving the power system start request instruction, the engine controller 1052 controls the power system 104 to inject fuel after receiving the power system start request instruction and the fuel injection instruction, so that the power system 104 has combustion conditions in advance. In this way, the power system 104 can quickly reach the target speed and then start quickly, which improves the success rate of the all-terrain vehicle 100 starting and reduces the start time of the all-terrain vehicle 100 in a low temperature environment. In addition, since the entire starting process does not require additional parts, the manufacturing cost of the all-terrain vehicle 100 is not increased.

[0055] Please refer to Figure 3 , is a flow chart of a method for starting the all-terrain vehicle 100 provided in an embodiment of the present application. This embodiment is applied to the vehicle controller of the all-terrain vehicle 100 provided in the above-mentioned embodiment, and includes the following steps:

[0056] Step 201: When the temperature of the power system is lower than a first preset temperature, a power system start request instruction is sent to an engine controller and a generator controller.

[0057] In some embodiments, there is no specific limitation on the value of the first preset temperature, and it can be set according to actual needs. For example, the value of the first preset temperature can be -20°C, -18°C, etc.

[0058] Step 202: Sending a fuel injection command to the engine controller; wherein, after receiving the power system start request command, the generator controller controls the generator to drive the power system to rotate; after receiving the power system start request command and the fuel injection command, the engine controller controls the power system to inject fuel.

[0059] Compared with the prior art, the embodiment of the present application has at least the following advantages: when the temperature of the power system is lower than the first preset temperature, that is, the power system is in a low temperature environment, the vehicle controller sends a power system start request instruction to the engine controller and the generator controller respectively, and simultaneously sends a fuel injection instruction to the engine controller. Since the generator controller controls the generator to drive the power system to rotate after receiving the power system start request instruction, the engine controller controls the power system to inject fuel after receiving the power system start request instruction and the fuel injection instruction, so that the power system has combustion conditions in advance. In this way, the power system can quickly reach the target speed and then start quickly, which improves the success rate of the all-terrain vehicle start-up and reduces the start-up time of the all-terrain vehicle in a low temperature environment. In addition, since the entire start-up process does not require additional parts, the manufacturing cost of the all-terrain vehicle is not increased.

[0060] Please refer to Figure 4 , is a flow chart of a method for starting an all-terrain vehicle 100 provided in an embodiment of the present application. This embodiment is a further description of the above-mentioned embodiment, and specifically describes how to start the engine when the power system is an engine, the all-terrain vehicle 100 is in motion, and the engine is in an off state.

[0061] The specific process of this embodiment is as follows Figure 4 As shown, the vehicle controller applied to the all-terrain vehicle 100 provided in the above embodiment includes the following steps:

[0062] Step 301: Detect that the engine is in an off state and the ATV 100 is in a moving state.

[0063] In some embodiments, the ATV 100 further includes a drive motor, which is also used to provide power for the ATV 100. For example, when the user selects the power mode as the electric mode, the drive motor drives the wheels to rotate and the engine stops working.

[0064] Step 302: Determine whether the engine is initially started successfully. If it is determined that the engine is initially started successfully, execute step 303; otherwise, execute step 301.

[0065] In some embodiments, the power control system also includes a power mode switch, which is connected to the vehicle controller; the power mode switch is used to respond to the user's power mode selection and send power mode selection information to the vehicle controller; the power mode selection information includes selecting a hybrid mode and selecting an electric mode; a preliminary start-up judgment of the power system is performed based on the power mode selection information, including: when the power mode selection information is to select a hybrid mode, directly judging that the power system has been initially started successfully; when the power mode selection information is to select an electric mode, judging whether the power system has been initially started successfully based on whether the state of the all-terrain vehicle 100 meets the first preset condition.

[0066] In some embodiments, whether the power system is initially started successfully is determined based on whether the state of the all-terrain vehicle 100 satisfies a first preset condition, including: when the state of the all-terrain vehicle 100 satisfies any of the following conditions, determining that the power system is initially started successfully: the speed of the all-terrain vehicle 100 is greater than the first preset speed, the vehicle demand power of the all-terrain vehicle 100 is less than the maximum discharge power of the power battery, the temperature of the power battery is less than the second preset temperature, the SOC value of the power battery is less than the first preset threshold or the discharge power of the power battery is less than the first preset power.

[0067] In some embodiments, the battery management system is used to monitor the SOC value and temperature of the power battery, and send the SOC value and temperature of the power battery to the vehicle controller.

[0068] In some embodiments, there is no specific limitation on the first preset speed, the second preset temperature, the first preset threshold, and the first preset power, and they can be set according to actual needs.

[0069] For example, in this embodiment, the first preset condition can be set as: the speed of the all-terrain vehicle 100 is greater than 80 kilometers per hour, or the temperature of the power battery is less than -10°C, or the SOC value of the power battery is less than 20%, or the discharge power of the power battery is less than 40KW.

[0070] It is worth noting that judging whether the engine is initially started successfully in the above manner can improve the accuracy of the judgment, thereby ensuring that the engine can be successfully started in the subsequent process.

[0071] Step 303: Determine whether the engine is allowed to start. If it is determined that the engine is allowed to start, execute step 304; otherwise, execute step 301.

[0072] In some embodiments, the power system is allowed to start based on the driving state of the ATV 100, whether the power system is faulty, and whether the SOC value of the power battery is less than a second preset threshold.

[0073] This embodiment does not specifically limit the size of the second preset threshold value, and can be set according to actual needs. For example, when the vehicle controller detects that the vehicle is in the running mode, the engine is not faulty, and the SOC value of the power battery of the all-terrain vehicle 100 is less than 80%, the vehicle controller determines to allow the engine to start.

[0074] By determining whether to allow the engine to start in the above manner, the accuracy of the determination can be improved, thereby ensuring that the engine can be successfully started in the subsequent process.

[0075] Step 304: Determine whether the engine is initially shut down successfully. If it is determined that the engine is initially shut down successfully, execute step 305; otherwise, execute step 306.

[0076] In some embodiments, the vehicle controller makes a preliminary shutdown determination of the power system according to the power mode selection information. For example, when the power mode corresponding to the received power mode selection information is the electric mode, it is directly determined that the engine has been successfully initially shut down; when the power mode corresponding to the received power mode selection information is the hybrid mode, it is determined whether the engine has been successfully initially shut down according to whether the state of the all-terrain vehicle 100 satisfies the second preset condition.

[0077] In some embodiments, the second preset condition includes but is not limited to: the speed of the ATV 100 is less than the second preset speed, the vehicle power requirement of the ATV 100 is less than the second preset power, or the SOC value of the power battery is greater than a third preset threshold. It is understood that if the state of the ATV 100 meets any of the above conditions, the vehicle controller determines that the initial shutdown of the engine is successful.

[0078] In some embodiments, there is no specific limitation on the second preset speed, the second preset power, and the third preset threshold, and they can be set according to actual needs.

[0079] For example, in this embodiment, the second preset condition can be set as: the speed of the all-terrain vehicle 100 is less than 70 km / h, or the SOC value of the power battery is greater than 85%, or the vehicle power requirement of the all-terrain vehicle 100 is much less than the maximum discharge power of the power battery.

[0080] Step 305: Determine whether the engine shutdown is allowed. If it is determined that the engine shutdown is allowed, execute step 301; otherwise, execute step 306.

[0081] In some embodiments, if the state of the all-terrain vehicle 100 meets any of the following conditions, the vehicle controller determines that the power system is allowed to shut down: the maximum discharge power of the power battery is greater than the third preset power, the SOC value of the power battery is greater than the fourth preset threshold, the temperature of the power battery is greater than the third preset temperature, the engine has no shutdown prohibition request, or the engine temperature is greater than the fourth preset temperature.

[0082] In some embodiments, there is no specific limitation on the third preset power, the fourth preset threshold, the third preset temperature, and the fourth preset temperature, and they can be set according to actual needs.

[0083] For example, in this embodiment, it can be set as follows: the maximum discharge power of the power battery is greater than 50KW, the SOC value of the power battery is greater than 23%, the temperature of the power battery is greater than 0°C, there is no engine shutdown prohibition request, or the engine water temperature is greater than 80°C.

[0084] It is worth noting that, by determining that the initial engine shutdown fails or the engine shutdown is not allowed, and then performing subsequent steps of determining the engine start type, the stability of the engine start process can be further ensured, and the engine start can be successfully ensured.

[0085] Step 306: Determine whether the engine water temperature is less than a first preset temperature. If it is determined that the engine water temperature is less than the first preset temperature, execute step 307; otherwise, execute step 309.

[0086] Step 307: Performing the engine cold start mode, the vehicle controller sends the power system start request instruction and the first target speed to the engine controller and the generator controller, and simultaneously sends the injection instruction to the engine controller.

[0087] Step 308: Detect whether the engine speed reaches the first target speed. After detecting that the engine speed reaches the first target speed, execute step 312; otherwise, continue to execute step 308.

[0088] Step 309: Perform the normal engine start mode, the vehicle controller sends the power system start request instruction to the engine controller and the generator controller, and sends the second target speed to the generator controller.

[0089] Step 310: Detect whether the engine speed reaches the second target speed. After detecting that the engine speed reaches the second target speed, execute step 311; otherwise, continue to execute step 310.

[0090] Step 311: Send a fuel injection command to the engine controller.

[0091] Step 312: The engine starts successfully.

[0092] Compared with the prior art, the embodiment of the present application has at least the following advantages: when the temperature of the power system is lower than the first preset temperature, that is, the power system is in a low temperature environment, the vehicle controller sends a power system start request instruction to the engine controller and the generator controller respectively, and simultaneously sends a fuel injection instruction to the engine controller. Since the generator controller controls the generator to drive the power system to rotate after receiving the power system start request instruction, the engine controller controls the power system to inject fuel after receiving the power system start request instruction and the fuel injection instruction, so that the power system has combustion conditions in advance. In this way, the power system can quickly reach the target speed and then start quickly, which improves the success rate of the all-terrain vehicle start-up and reduces the start-up time of the all-terrain vehicle in a low temperature environment. In addition, since the entire start-up process does not require additional parts, the manufacturing cost of the all-terrain vehicle is not increased.

[0093] The above description is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application.

Claims

1. An all-terrain vehicle comprising: Vehicle body; Wheels, including front wheels and rear wheels; a control system, supported by the vehicle body, for controlling powering on and off of the all-terrain vehicle; A power system, supported by the vehicle body and used to provide power for the all-terrain vehicle, wherein at least one of the front wheel and the rear wheel is connected to the power system; Characterized in that the all-terrain vehicle also includes: A generator, the generator is used to drive the power system to rotate; A power control system, the power control system is used for power control of the power system; The power control system includes a vehicle controller, an engine controller and a generator controller; the vehicle controller is used to send a power system start request instruction to the engine controller and the generator controller, and synchronously send an injection instruction to the engine controller when the temperature of the power system is lower than a first preset temperature; after receiving the power system start request instruction, the generator controller controls the generator to drive the power system to rotate; after receiving the power system start request instruction and the injection instruction, the engine controller controls the power system to inject fuel.

2. The all-terrain vehicle according to claim 1, characterized in that: The power control system further comprises a power mode switch, and the power mode switch is connected to the vehicle controller; The power mode switch is used to respond to the power mode selection of the user and send power mode selection information to the vehicle controller; The vehicle controller is used to: when the all-terrain vehicle is in a stopped state, make a preliminary start-up judgment of the power system according to the power mode selection information; after determining that the power system is initially started successfully, make a power system start-up permission judgment; after determining that the power system is allowed to start, when the temperature of the power system is less than a first preset temperature, send a power system start-up request instruction to the engine controller and the generator controller, and synchronously send a fuel injection instruction to the engine controller.

3. The all-terrain vehicle according to claim 2, characterized in that: The power mode selection information includes selecting a hybrid mode and selecting an electric mode; The performing preliminary power system startup determination according to the power mode selection information includes: When the power mode selection information indicates that the hybrid mode is selected, directly determining that the power system is initially started successfully; When the power mode selection information indicates that the electric mode is selected, it is determined whether the power system is initially started successfully according to whether the state of the all-terrain vehicle satisfies a first preset condition.

4. The all-terrain vehicle according to claim 3, characterized in that: The all-terrain vehicle further comprises a power battery, and the power battery is used to provide power to the generator; The first preset condition includes one of the following or any combination thereof: the speed of the all-terrain vehicle is greater than a first preset speed, the vehicle demand power of the all-terrain vehicle is less than the maximum discharge power of the power battery, the temperature of the power battery is less than a second preset temperature, the SOC value of the power battery is less than a first preset threshold or the discharge power of the power battery is less than the first preset power.

5. The all-terrain vehicle according to claim 2, characterized in that: The all-terrain vehicle further includes a power battery, and the power battery is used to provide power to the generator; after determining that the power system is initially started successfully, performing a power system start-up permission determination includes: After determining that the power system is initially started successfully, the vehicle controller determines whether the power system is allowed to start according to the driving state of the all-terrain vehicle, whether the power system is faulty, and whether the SOC value of the power battery is less than a second preset threshold; The determining whether to allow the power system to start includes: when the all-terrain vehicle is in motion, the power system has no faults, and the SOC value of the power battery is less than a second preset threshold, determining whether to allow the power system to start.

6. The all-terrain vehicle according to claim 1, characterized in that: The power control system further comprises a power mode switch, and the power mode switch is connected to the vehicle controller; The power mode switch is used to respond to the power mode selection of the user and send power mode selection information to the vehicle controller; The vehicle controller is further used to: when the all-terrain vehicle is in motion, make a preliminary start-up determination of the power system according to the power mode selection information; after determining that the power system is initially started successfully, make a power system start-up permission determination; after determining that the power system is allowed to start, make a preliminary power system shutdown determination according to the power mode selection information; When it is determined that the initial shutdown of the power system is unsuccessful, when the temperature of the power system is less than a first preset temperature, a power system startup request instruction is sent to the engine controller and the generator controller, and a fuel injection instruction is synchronously sent to the engine controller; When it is determined that the initial shutdown of the power system is successful, a power system shutdown is allowed to be determined; when it is determined that the power system shutdown is not allowed, when the temperature of the power system is less than a first preset temperature, a power system start request instruction is sent to the engine controller and the generator controller, and a fuel injection instruction is synchronously sent to the engine controller.

7. The all-terrain vehicle according to claim 6, characterized in that: The power mode selection information includes selecting a hybrid mode and selecting an electric mode; The performing preliminary shutdown determination of the power system according to the power mode selection information includes: When the power mode selection information indicates that the electric mode is selected, directly determining that the power system is initially shut down successfully; When the power mode selection information indicates that the hybrid mode is selected, it is determined whether the power system is initially shut down successfully according to whether the state of the all-terrain vehicle satisfies a second preset condition.

8. The all-terrain vehicle according to claim 7, characterized in that: The all-terrain vehicle further comprises a power battery, and the power battery is used to provide power to the generator; The second preset condition includes one of the following or any combination thereof: the speed of the all-terrain vehicle is less than a second preset speed, the vehicle power requirement of the all-terrain vehicle is less than a second preset power, or the SOC value of the power battery is greater than a third preset threshold.

9. The all-terrain vehicle according to claim 6, characterized in that: The all-terrain vehicle further includes a power battery, which is used to provide power to the generator; the step of determining whether the power system is allowed to stop includes: If the state of the all-terrain vehicle meets any of the following conditions, it is determined that the power system is allowed to shut down: the maximum discharge power of the power battery is greater than a third preset power, the SOC value of the power battery is greater than a fourth preset threshold, the temperature of the power battery is greater than a third preset temperature, the power system has no shutdown prohibition request, or the temperature of the power system is greater than a fourth preset temperature.

10. A method for starting an all-terrain vehicle, characterized in that: The all-terrain vehicle comprises: a power system for providing power to the all-terrain vehicle; a power control system for controlling the power of the power system, wherein the power system comprises an engine controller and a generator controller; and a generator for driving the power system to rotate; The startup method comprises: When the temperature of the power system is lower than a first preset temperature, sending a power system start request instruction to the engine controller and the generator controller; A fuel injection command is sent to the engine controller; wherein, after receiving the power system start request command, the generator controller controls the generator to drive the power system to rotate; after receiving the power system start request command and the fuel injection command, the engine controller controls the power system to inject fuel.

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