All-terrain vehicle and method of starting the same

Abstract

The application 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. The power control system comprises a vehicle controller, an engine controller and a generator controller. The all-terrain vehicle further comprises a generator configured to drive the power system to rotate. The vehicle controller is configured to send a power system starting 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 oil injection instruction to the engine controller. The generator controller is configured to control the generator to drive the power system to rotate after receiving the power system starting request instruction. The engine controller is configured to control the power system to inject oil after receiving the power system starting request instruction and the oil injection instruction. The application can improve the success rate of starting the all-terrain vehicle in a low-temperature environment, reduce the starting time and does not increase the manufacturing cost of the all-terrain vehicle.

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

[0002] With the development of the global new energy vehicle industry, considering that the power battery has not made a breakthrough, the extended range technology route is accepted by more and more OEMs and markets. The traditional extended range device is composed of an engine and a generator. Generally, the engine start of the extended range vehicle is powered by the power battery, and after receiving the start instruction and the generator target speed sent by the vehicle controller, the generator reversely drags the engine to the target speed, sprays oil to the engine, and then starts the engine. However, all-terrain vehicles are often used at minus 20 degrees Celsius or even lower temperatures, and if only the above starting control strategy is used, there may be a situation that the engine starting time is too long or even cannot be started in the actual use process, resulting in vehicle emission exceeding the standard and poor user experience.

[0003] In the related art, a combustion-supporting controller is added, and in a low-temperature environment, the engine is sprayed with combustion-supporting gas according to the engine water temperature, the internal air pressure, and the injection mode instruction sent by the vehicle controller, so as to start the engine. However, this way increases the manufacturing cost of the all-terrain vehicle, and the engine takes a long time to start. SUMMARY

[0004] Therefore, 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 not increase the manufacturing cost of the all-terrain vehicle.

[0005] The embodiment of the present application provides an all-terrain vehicle, which comprises a vehicle body, wheels including front wheels and rear wheels, a control system supported by the vehicle body and used for controlling the power-on and power-off of the all-terrain vehicle, and a power system supported by the vehicle body and used for providing power for the all-terrain vehicle, at least one of the front wheels and the rear wheels being connected with the power system. The all-terrain vehicle further comprises a generator used for driving the power system to rotate, and a power control system used for power control of the power system. The power control system comprises a vehicle controller, an engine controller, and a generator controller. The vehicle controller 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 less 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. The engine controller controls the power system to spray oil after receiving the power system starting request instruction and the oil injection instruction.

[0006] The embodiments of the present application have at least the following advantages over the prior art:

[0007] When the temperature of the power system is less than the first preset temperature, i.e., 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, and synchronously sends an oil 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, and the engine controller controls the power system to inject oil after receiving the power system start request instruction and the oil injection instruction, the power system can quickly reach the target speed and start quickly, thereby improving the success rate of starting the all-terrain vehicle and reducing the starting time of the all-terrain vehicle in a low-temperature environment. In addition, the entire starting process does not require additional parts, and the manufacturing cost of the all-terrain vehicle is not increased.

[0008] In some possible implementation manners, the power control system further includes a power mode switch connected with the vehicle controller; the power mode switch is configured to send power mode selection information to the vehicle controller in response to a user's power mode selection; and the vehicle controller is configured to: when the all-terrain vehicle is in a stopped state, make a power system preliminary start determination according to the power mode selection information; make a power system allowed start determination after determining that the power system preliminary start is successful; and after determining that the power system is allowed to start, execute the step of sending a power system start request instruction to the engine controller and the generator controller, and synchronously sending an oil injection instruction to the engine controller when the temperature of the power system is less than a first preset temperature.

[0009] In some possible implementation manners, the power mode selection information includes selection of a hybrid mode and selection of an electric mode; and the power system preliminary start determination according to the power mode selection information includes: when the power mode selection information is the selection of the hybrid mode, directly determining that the power system preliminary start is successful; and when the power mode selection information is the selection of the electric mode, determining whether the power system preliminary start is successful according to whether a state of the all-terrain vehicle meets a first preset condition.

[0010] In some possible implementation manners, the all-terrain vehicle further includes a power battery configured to provide power for the generator; and the first preset condition includes one or any combination of the following: a vehicle speed of the all-terrain vehicle is greater than a first preset speed, a total vehicle demand power of the all-terrain vehicle is less than a maximum discharge power of the power battery, a temperature of the power battery is less than a second preset temperature, an SOC value of the power battery is less than a first preset threshold, or a discharge power of the power battery is less than a first preset power.

[0011] In some possible implementation manners, the all-terrain vehicle further includes a power battery configured to provide power for the generator; the power system permission start determination after determining that the power system preliminary start is successful includes: after determining that the power system preliminary start is successful, the vehicle controller determines whether the power system is permitted to start according to a driving state of the all-terrain vehicle, whether the power system is faulty, and whether an SOC value of the power battery is less than a second preset threshold; and the determination that the power system is permitted 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, it is determined that the power system is permitted to start.

[0012] In some possible implementation manners, the power control system further includes a power mode switch connected with the vehicle controller; the power mode switch is configured to send power mode selection information to the vehicle controller in response to a power mode selection of a user; and the vehicle controller is further configured to: when the all-terrain vehicle is in a moving state, determine whether the power system is permitted to start according to the power mode selection information; after determining that the power system preliminary start is successful, determine whether the power system is permitted to start; after determining that the power system is permitted to start, determine whether the power system preliminary shutdown is successful according to the power mode selection information; when it is determined that the power system preliminary shutdown is not successful, execute again the operation of sending, to the engine controller and the generator controller, a power system start request instruction when the temperature of the power system is less than a first preset temperature, and synchronously sending, to the engine controller, an oil injection instruction; and when it is determined that the power system preliminary shutdown is successful, determine whether the power system is permitted to stop; and when it is determined that the power system is not permitted to stop, execute again the operation of sending, to the engine controller and the generator controller, a power system start request instruction when the temperature of the power system is less than the first preset temperature, and synchronously sending, to the engine controller, an oil injection instruction.

[0013] In some possible implementation manners, the power mode selection information includes selection of a hybrid mode and selection of an electric mode; and the determination of whether the power system preliminary shutdown is successful according to the power mode selection information includes: when the power mode selection information is the selection of the electric mode, it is directly determined that the power system preliminary shutdown is successful; and when the power mode selection information is the selection of the hybrid mode, it is determined whether the power system preliminary shutdown is successful according to whether a state of the all-terrain vehicle meets a second preset condition.

[0014] In some possible implementation manners, the all-terrain vehicle further includes a power battery configured to provide power for the generator; and the second preset condition includes one or any combination of the following: a vehicle speed of the all-terrain vehicle is less than a second preset speed, a total vehicle demand power of the all-terrain vehicle is less than a second preset power, or an SOC value of the power battery is greater than a third preset threshold.

[0015] In some possible implementation manners, the all-terrain vehicle further includes a power battery configured to provide power for the generator; and the performing the power system permission shutdown determination includes: determining that the power system is permitted to be shut down if a state of the all-terrain vehicle satisfies any one of the following conditions: a maximum discharge power of the power battery is greater than a third preset power, an SOC value of the power battery is greater than a fourth preset threshold, a temperature of the power battery is greater than a third preset temperature, the power system has no shutdown prohibition request, or a temperature of the power system is greater than a fourth preset temperature.

[0016] The second aspect of the present application further provides a starting method of an all-terrain vehicle, the all-terrain vehicle including: a power system configured to provide power for the all-terrain vehicle; a power control system configured to perform power control on the power system, the power system including an engine controller and a generator controller; and a generator configured to drive the power system to rotate; the starting method including: sending a power system starting request instruction to the engine controller and the generator controller when a temperature of the power system is less than a first preset temperature; and sending an oil injection instruction to the engine controller; wherein the generator controller controls the generator to drive the power system to rotate after receiving the power system starting request instruction; and the engine controller controls the power system to inject oil after receiving the power system starting request instruction and the oil injection instruction.

[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 provided above, and therefore, the beneficial effects that can be achieved by the starting method can refer to the beneficial effects of the corresponding structure provided above, which will not be described here again. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 FIG. 1 is a schematic diagram of an all-terrain vehicle according to an embodiment of the present application;

[0019] Figure 2 FIG. 4 is a schematic diagram of a functional module of a power control system according to an embodiment of the present application;

[0020] Figure 3 FIG. 6 is a first flowchart of a starting method of an all-terrain vehicle according to an embodiment of the present application;

[0021] Figure 4The second flowchart of the starting method of the all-terrain vehicle is provided for an embodiment of the present application. DETAILED DESCRIPTION

[0022] In order to enable a more complete understanding of the above-mentioned objects, features and advantages of the present application, the present application will be described in detail below with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0023] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application. The described embodiments are only a part of the embodiments of the present application, and are not all the embodiments.

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

[0025] Further, it should be noted that, herein, the terms "comprise", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device.

[0026] The terms "first", "second", and the like in the specification and claims of the present application and the drawings are used to distinguish similar objects, and are not used to describe a specific order or sequence.

[0027] For the sake of understanding, the following exemplary gives a part of the description of the concepts related to the embodiments of the present application for reference.

[0028] Vehicle Control Unit (VCU): The vehicle control unit can monitor the actions of the lower layer component control modules, responsible for the normal driving of the vehicle, braking energy feedback, management of the vehicle power supply, network management, fault diagnosis and processing, monitoring of the vehicle state, etc., which can ensure the normal and stable work of the vehicle under good power and reliability.

[0029] Motor Control Unit (MCU): The motor control unit 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 three-phase lines; the MCU can also be directly installed on the drive motor, saving space and reducing cost, but increasing the complexity of maintenance and replacement.

[0030] Generator Control Unit (GCU): can realize four-quadrant operation control of the motor according to external control instructions, and can switch between speed and torque closed-loop control modes according to control needs, and has built-in fault detection and processing functions such as overvoltage and overcurrent. The generator controller converts the direct current of the all-terrain vehicle power battery into alternating current 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): 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 amount, fuel injection timing, ignition closing angle, engine idle operation, and the state of other accessory systems of the vehicle under various operating conditions.

[0032] Battery Management System (BMS): The main function of the BMS is to improve the utilization rate of the battery, prevent overcharging and overdischarging of the battery, prolong the service life of the battery, and monitor the state of the battery. Generally, it is a system that manages, controls and uses the battery pack.

[0033] Please refer to Figure 1 and Figure 2 The all-terrain vehicle 100 provided by the embodiments 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 front wheels 1021 and rear wheels 1022; the control system 103 is supported by the vehicle body 101 and is used to control the power-on and power-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 wheels 1021 and the rear wheels 1022 is connected with the power system 104; the power control system 105 is used for power control of the power system 104.

[0034] Please refer to Figure 2The power control system 105 comprises a vehicle controller 1051, an engine controller 1052 and a generator controller 1053. The vehicle controller 1051 is configured to send a power system start request instruction to the engine controller 1052 and the generator controller 1053, and synchronously send an oil injection instruction to the engine controller 1052 when the temperature of the power system 104 is less than the first preset temperature. 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 oil after receiving the power system start request instruction and the oil injection instruction.

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

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

[0037] When the temperature of the engine 104 is less than the first preset temperature, the generator 106 is difficult to drive the crankshaft of the engine 104 to the second target speed, for example, only to drive the crankshaft of the engine 104 to the first target speed, wherein the first target speed is less than the second target speed. When the crankshaft of the engine 104 rotates to the first target speed, the success rate of the engine 104 starting is not high when the engine 104 is controlled to spray oil. Therefore, by sending the power system starting request instruction to the engine controller 1052 and the generator controller 1053 while sending the oil injection instruction to the engine controller 1052 through the vehicle controller 1051, the engine 104 has combustion conditions before the generator drives the crankshaft of the engine 104, that is, before the speed of the crankshaft of the engine 104 reaches the first target speed. After the vehicle controller 1051 sends the ignition instruction to the engine controller 1052 when the speed of the crankshaft of the engine 104 reaches the first target speed, the engine 104 can quickly ignite successfully, so that the crankshaft of the engine 104 can be driven by itself at low speed, thereby reducing the load of the engine 104, and further enabling the generator 106 to continue to drive the crankshaft of the engine 104 until the second target speed is reached, and the engine 104 starts successfully.

[0038] Please refer again to Figure 2 The power control system 105 further includes a power mode switch 1054 connected with the vehicle controller 1051. The power mode switch 1054 is used to send power mode selection information to the vehicle controller 1051 in response to the user's power mode selection.

[0039] Specifically, Figure 2 The functional module diagram of the power control system 105 shown in FIG. 5 further includes a battery management system 1055. The power mode switch 1054 is connected with the vehicle controller 1051 through hardwiring. The vehicle controller 1051 spans two CAN buses (i.e. CAN1 and CAN2) shown in FIG. 5. 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. Figure 2

[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 the first preset temperature, the vehicle controller 1051 is configured to: determine the preliminary start of the power system 104 according to the power mode selection information; determine the power system 104 allowed to start after determining that the preliminary start of the power system 104 is successful; and send the power system starting request instruction to the engine controller 1052 and the generator controller 1053, and synchronously send the oil injection instruction to the engine controller 1052 after determining that the power system 104 is allowed to start. ​

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

[0042] It can be understood that the all-terrain vehicle 100 also includes a power battery for providing power to the generator 106.

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

[0044] 1. The user selects the power mode of the all-terrain vehicle 100 through the power mode switch 1054. For example, the power mode switch 1054 is a button A and a button B, the button A corresponds to the electric mode, and the button B corresponds to the hybrid mode. The user presses the button A, i.e., selects the power mode of the all-terrain vehicle 100 as the electric mode, and the user presses the button B, i.e., selects the power mode of the all-terrain vehicle 100 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 engine preliminary start determination. When the power mode corresponding to the received power mode selection information is the hybrid mode, it is directly determined that the power system 104 is preliminarily started successfully. When the power mode corresponding to the received power mode selection information is the electric mode, it is determined whether the power system is preliminarily started successfully according to whether the state of the all-terrain vehicle 100 meets the first preset condition.

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

[0047] In some embodiments, the sizes of the first preset speed, the second preset temperature, the first preset threshold, and the first preset power are not specifically limited and can be set according to actual needs.

[0048] For example, in this embodiment, the first preset condition can be set as that the vehicle speed of the all-terrain vehicle 100 is greater than 80 km / h, or the temperature of the power battery is less than -10℃, 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、The vehicle controller 1051 judges the engine preliminary start success, and the vehicle controller 1051 judges the power system to start, that is, according to the all-terrain vehicle 100 running state, power system failure and power battery SOC value is less than the second preset threshold value of power system to start.

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

[0051] 4、The engine 104 sends the engine water temperature to the vehicle controller 1051, and the vehicle controller 1051 receives the engine water temperature and judges the start type. When the engine water temperature is less than-20℃, the engine cold start mode is performed; when the engine water temperature is greater than or equal to-20℃, 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 synchronously sends the oil injection instruction to the engine controller 1052. 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; the engine controller 1052 controls the engine 104 to inject oil after receiving the power system start request instruction and the oil injection instruction, so that the fuel chamber of the engine 104 has combustion conditions in advance, thereby reducing the load of the engine 104, and further enabling the generator 106 to continue to drive the engine 104 to rotate to the second target speed, and the engine 104 starts successfully.

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

[0054] Compared with the related art, the embodiment of the application has at least the following advantages: when the temperature of the power system 104 is less 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 starting request instruction to the engine controller 1052 and the generator controller 1053 respectively, and synchronously sends an oil 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 starting request instruction, the engine controller 1052 controls the power system 104 to inject oil after receiving the power system starting request instruction and the oil injection instruction, so that the power system 104 has a combustion condition in advance. In this way, the power system 104 can quickly reach the target speed, thereby quickly starting, improving the success rate of starting the all-terrain vehicle 100, and reducing the starting 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 The flowchart of the starting method of the all-terrain vehicle 100 provided by the embodiment of the application. The embodiment is applied to the vehicle controller of the all-terrain vehicle 100 provided by the foregoing embodiment, and includes the following steps:

[0056] Step 201: When the temperature of the power system is less than the first preset temperature, send a power system starting request instruction to the engine controller and the generator controller.

[0057] In some embodiments, the size of the first preset temperature is not specifically limited, and 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: Send an oil injection instruction to the engine controller; wherein the generator controller controls the generator to drive the power system to rotate after receiving the power system starting request instruction; and the engine controller controls the power system to inject oil after receiving the power system starting request instruction and the oil injection instruction.

[0059] The application embodiment has at least the following advantages relative to the prior art: when the temperature of the power system is less 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, and synchronously sends an oil 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, and the engine controller controls the power system to inject oil after receiving the power system start request instruction and the oil injection instruction, the power system has combustion conditions in advance. In this way, the power system can quickly reach the target speed, thereby quickly starting, improving the success rate of starting the all-terrain vehicle, and reducing the starting time of the all-terrain vehicle in a low-temperature environment. In addition, the entire starting process does not require additional parts, and the manufacturing cost of the all-terrain vehicle is not increased.

[0060] Please refer to Figure 4 The flowchart of the starting method of the all-terrain vehicle 100 provided by the application embodiment is shown in FIG. 6. This embodiment is a further description of the foregoing embodiment, and specifically describes how to start the engine when the power system is an engine and the all-terrain vehicle 100 is in a moving state and the engine is in an off state.

[0061] The specific process of this embodiment is shown in Figure 4 The vehicle controller of the all-terrain vehicle 100 provided by the foregoing embodiment, as shown in FIG. 6, comprises the following steps:

[0062] Step 301: Detecting that the engine is in an off state and the all-terrain vehicle 100 is in a moving state.

[0063] In some embodiments, the all-terrain vehicle 100 further comprises a driving motor, which is also used to provide power for the all-terrain vehicle 100. For example, when the user selects the power mode as the electric mode, at this time, the driving motor drives the wheels to rotate, and the engine stops working.

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

[0065] In some embodiments, the power control system further comprises a power mode switch connected to the vehicle controller; the power mode switch is configured to send power mode selection information to the vehicle controller in response to a user's power mode selection; the power mode selection information comprises selection of a hybrid mode and selection of an electric mode; and the power system preliminary start determination is performed according to the power mode selection information, comprising: when the power mode selection information is selection of the hybrid mode, directly determining that the power system preliminary start is successful; and when the power mode selection information is selection of the electric mode, determining whether the power system preliminary start is successful according to whether the state of the all-terrain vehicle 100 meets the first preset condition.

[0066] In some embodiments, determining whether the power system preliminary start is successful according to whether the state of the all-terrain vehicle 100 meets the first preset condition comprises: when the state of the all-terrain vehicle 100 meets any of the following conditions, determining that the power system preliminary start is successful: the vehicle speed of the all-terrain vehicle 100 is greater than a first preset speed, the total 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 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 a first preset power.

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

[0068] In some embodiments, the first preset speed, the second preset temperature, the first preset threshold, and the first preset power are not specifically limited in size and can be set according to actual needs.

[0069] For example, in the present embodiment, the first preset condition can be set as: the vehicle 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℃, 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 the above method of determining whether the engine preliminary start is successful can improve the accuracy of the determination, thereby ensuring that the engine can be successfully started in the subsequent process.

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

[0072] In some embodiments, the power system start determination is performed 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 a second preset threshold.

[0073] The size of the second preset threshold is not specifically limited in this embodiment, 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 has no fault, 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 judging whether to allow the engine to start in the above manner, the accuracy of the judgment can be improved, and the engine can be ensured to successfully start in the subsequent process.

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

[0076] In some embodiments, the vehicle controller determines the power system initial stop 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 is successfully initially stopped; when the power mode corresponding to the received power mode selection information is the hybrid mode, it is determined whether the engine is successfully initially stopped according to whether the state of the all-terrain vehicle 100 meets the second preset condition.

[0077] In some embodiments, the second preset condition includes but is not limited to that the vehicle speed of the all-terrain vehicle 100 is less than a second preset speed, the vehicle demand power of the all-terrain vehicle 100 is less than a second preset power, or the SOC value of the power battery is greater than a third preset threshold. It can be understood that if the state of the all-terrain vehicle 100 meets any of the above conditions, the vehicle controller determines that the engine is successfully initially stopped.

[0078] In some embodiments, the size of the second preset speed, the second preset power, and the third preset threshold is not specifically limited, and can be set according to actual needs.

[0079] For example, in this embodiment, the second preset condition can be set as that the vehicle 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 demand power of the all-terrain vehicle 100 is much less than the maximum discharge power of the power battery.

[0080] Step 305: Determine whether to allow the engine to stop. If it is determined to allow the engine to stop, step 301 is performed; otherwise, step 306 is performed.

[0081] In some embodiments, if the state of the all-terrain vehicle 100 meets any of the following conditions, the vehicle controller determines to allow the power system to stop: 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 engine has no stop request, or the temperature of the engine is greater than a fourth preset temperature.

[0082] In some embodiments, the third preset power, the fourth preset threshold, the third preset temperature and the fourth preset temperature are not specifically limited in size, and can be set according to actual needs.

[0083] For example, in the present embodiment, 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℃, the engine has no stop request, or the engine water temperature is greater than 80℃.

[0084] It is worth noting that, by judging that the engine preliminary stop fails or is not allowed to stop the engine, the subsequent engine start type determination step is performed, which can further ensure the stability of the engine start process and ensure the success of the engine start.

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

[0086] Step 307: Perform 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 synchronously sends the oil 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, step 312 is performed; otherwise, step 308 is continued.

[0088] Step 309: Perform engine normal 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, step 311 is performed; otherwise, step 310 is continued.

[0090] Step 311: Send the oil injection instruction to the engine controller.

[0091] Step 312: The engine starts successfully.

[0092] Compared with the prior art, the embodiments of the present application have at least the following advantages: when the temperature of the power system is less than the first preset temperature, that is, the power system is in a low-temperature environment, the vehicle controller sends a power system starting request instruction to the engine controller and the generator controller respectively, and synchronously sends an oil 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 starting request instruction, and the engine controller controls the power system to inject oil after receiving the power system starting request instruction and the oil injection instruction, the power system has combustion conditions in advance. In this way, the power system can quickly reach the target speed, thereby quickly starting, improving the success rate of starting the all-terrain vehicle, and reducing the starting time of the all-terrain vehicle 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 is not increased.

[0093] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any change or replacement within the technical scope disclosed in the present application should be covered within the protection scope of the present application.

Claims

1. An all-terrain vehicle, comprising: Vehicle body; Wheels, including front wheels and rear wheels; The control system, supported by the vehicle body, is used to control the power-on and power-off of the all-terrain vehicle; A power system, supported by the vehicle body, is used to provide power to 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 is characterized in that it further includes: A generator, used to drive the power system to rotate; A power control system, wherein the power control system is used for power control of the power system; The powertrain control system includes a vehicle controller, an engine controller, and a generator controller. When the temperature of the powertrain is lower than a first preset temperature, the vehicle controller sends a powertrain start request command to the engine controller and the generator controller, and simultaneously sends a fuel injection command to the engine controller. Upon receiving the powertrain start request command, the generator controller controls the generator to drive the powertrain to rotate. Upon receiving the powertrain start request command and the fuel injection command, the engine controller controls the powertrain to inject fuel.

2. The all-terrain vehicle according to claim 1, characterized in that, 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, perform a preliminary start determination of the power system based on the power mode selection information; after determining that the preliminary start of the power system is successful, perform a start permission determination of the power system; after determining that the start permission of the power system is granted, send a power system start request command to the engine controller and the generator controller when the temperature of the power system is lower than a first preset temperature, and simultaneously send a fuel injection command to the engine controller.

3. The all-terrain vehicle according to claim 2, characterized in that, The power mode selection information includes selecting hybrid mode and selecting electric mode; The preliminary start-up determination of the power system based on the power mode selection information includes: When the power mode selection information indicates that the hybrid mode has been selected, it is directly determined that the power system has been initially started successfully. When the power mode selection information is set to electric mode, the power system is determined to have started successfully based on whether the state of the all-terrain vehicle meets the first preset condition.

4. The all-terrain vehicle according to claim 3, characterized in that, The all-terrain vehicle also includes a power battery, which provides power to the generator; The first preset condition includes one or any combination of the following: the speed of the all-terrain vehicle is greater than the first preset speed, the total power required by the all-terrain vehicle 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.

5. The all-terrain vehicle according to claim 2, characterized in that, The all-terrain vehicle also includes a power battery, which provides power to the generator; the step of determining whether the power system is allowed to start after the initial start-up of the power system is determined to be successful includes: After determining that the power system has started successfully, the vehicle controller determines whether the power system can start based on the driving status 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 determination to allow the power system to start includes: when the all-terrain vehicle is in motion, the power system is fault-free, and the SOC value of the power battery is less than a second preset threshold, the determination to allow the power system to start is made.

6. The all-terrain vehicle according to claim 1, characterized in that, 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 also used to: when the all-terrain vehicle is in motion, perform a preliminary start-up determination of the power system based on the power mode selection information; after determining that the power system has started successfully, perform a power system start-up permission determination; after determining that the power system start-up is permitted, perform a preliminary shutdown determination of the power system based on the power mode selection information. If the initial shutdown of the power system fails, then when the temperature of the power system is lower than the first preset temperature, a power system start request command is sent to the engine controller and the generator controller, and a fuel injection command is sent to the engine controller simultaneously. When the power system is determined to have successfully shut down initially, a power system shutdown permission determination is performed. If the power system is determined not to shut down, a power system start request command is sent to the engine controller and the generator controller when the temperature of the power system is lower than the first preset temperature, and a fuel injection command is sent to the engine controller simultaneously.

7. The all-terrain vehicle according to claim 6, characterized in that, The power mode selection information includes selecting hybrid mode and selecting electric mode; The preliminary shutdown determination of the power system based on the power mode selection information includes: When the power mode selection information is set to electric mode, it is directly determined that the power system has successfully completed its initial shutdown. When the power mode selection information is the selected hybrid mode, the power system is determined to have successfully shut down initially based on whether the state of the all-terrain vehicle meets the second preset condition.

8. The all-terrain vehicle according to claim 7, characterized in that, The all-terrain vehicle also includes a power battery, which provides power to the generator; The second preset condition includes one or any combination of the following: the speed of the all-terrain vehicle is less than the second preset speed, the total power demand of the all-terrain vehicle is less than the second preset power, or the SOC value of the power battery is greater than the third preset threshold.

9. The all-terrain vehicle according to claim 6, characterized in that, The all-terrain vehicle also includes a power battery, which provides power to the generator; the determination of whether the power system can be shut down includes: If the all-terrain vehicle meets any of the following conditions, 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 power system has no request to prohibit shutdown, or the temperature of the power system is greater than the fourth preset temperature.

10. A method for starting an all-terrain vehicle, characterized in that, The all-terrain vehicle includes: a power system for providing power to the all-terrain vehicle; a power control system for controlling the power system, the power system including an engine controller and a generator controller; and a generator for driving the power system to rotate. The startup method includes: When the temperature of the power system is lower than a first preset temperature, a power system start request command is sent to the engine controller and the generator controller, and a fuel injection command is simultaneously 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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