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CN-116238474-B - Start control method, device and system for hybrid vehicle, vehicle and storage medium

CN116238474BCN 116238474 BCN116238474 BCN 116238474BCN-116238474-B

Abstract

The application provides a starting control method, a device, a system, a vehicle and a storage medium of a hybrid vehicle, which belong to the technical field of vehicle control, and the embodiment of the application can control the vehicle to enter an idle electric four-wheel drive mode under the condition of detecting the starting of the vehicle and can control the vehicle to enter a starting state under the condition of determining the vehicle to enter the starting state, and acquiring vehicle working condition data, further determining whether the vehicle meets the mode switching condition based on the vehicle working condition data, and finally controlling the clutch to be closed under the condition that the vehicle is determined to meet the mode switching condition so as to enable the vehicle to be switched from the idle electric four-wheel drive mode to the direct drive mode. According to the embodiment of the application, when the vehicle needs to be switched from the idle electric four-wheel drive mode to the direct drive mode, the vehicle can be quickly switched to the direct drive mode by controlling the clutch to be closed, so that the engine can quickly output torque, better acceleration performance and quicker power response of the vehicle are realized in a starting stage, and the driving experience of a driver is effectively improved.

Inventors

  • CHANG XIAO

Assignees

  • 蜂巢传动系统(江苏)有限公司

Dates

Publication Date
20260508
Application Date
20230328

Claims (11)

  1. 1. A start control method of a hybrid vehicle, characterized by comprising: Under the condition that the starting of the vehicle is detected, controlling the vehicle to enter an idle electric four-wheel drive mode, wherein in the idle electric four-wheel drive mode, a front drive motor and a rear drive motor of the vehicle are in a driving state, an engine is in an idle state, and a clutch is in a separation state; acquiring vehicle working condition data under the condition that the vehicle is determined to enter a starting state, wherein the vehicle working condition data comprises the current accelerator opening, the current vehicle speed and the current battery power; determining whether the vehicle meets a mode switching condition based on the vehicle working condition data; controlling the clutch to be closed under the condition that the vehicle meets the mode switching condition, so that the vehicle is switched from the idle electric four-drive mode to a direct-drive mode; Wherein controlling the clutch to be closed to switch the vehicle from the idle electric four-drive mode to a direct-drive mode if it is determined that the vehicle satisfies the mode switching condition includes: Controlling the rotation speed of the engine to increase so that the rotation speed of the engine satisfies a clutch closing condition, in a case where it is determined that the vehicle satisfies the mode switching condition; A step of controlling, in a case where it is determined that the vehicle satisfies the mode switching condition, an increase in the rotational speed of the engine so that the rotational speed of the engine satisfies a clutch closing condition, including: Transmitting an engine activation request to a transmission controller if it is determined that the vehicle satisfies the mode switching condition; acquiring an engine speed control request and a target speed curve returned by the gearbox controller in response to the engine activation request; Transmitting a speed following request containing the target speed curve to an engine controller in response to the engine speed control request, wherein the speed following request is used for indicating the engine controller to control the engine to follow the target speed curve; And under the condition that clutch slipping state information sent by the gearbox controller is obtained, determining that the rotating speed of the engine meets the clutch closing condition, wherein the clutch slipping state information is generated under the condition that the gearbox controller detects that the rotating speed difference at two ends of the clutch is smaller than a rotating speed difference threshold value and the clutch is completely filled with oil.
  2. 2. The start control method of a hybrid vehicle according to claim 1, characterized in that, in the case where a vehicle start is detected, the method further comprises, after the step of controlling the vehicle to enter an idle electric four-drive mode: acquiring a current gear and a current accelerator opening of the vehicle; And determining that the vehicle enters a starting state under the condition that the current gear is a forward gear and the current accelerator opening is larger than a first opening threshold.
  3. 3. The start control method of a hybrid vehicle according to claim 1, characterized in that the step of determining whether the vehicle satisfies a mode switching condition based on the vehicle operating condition data includes: determining whether a strong power demand exists for a driver based on the current accelerator opening; in the case where it is determined that the driver has a strong power demand, it is determined whether the vehicle satisfies a mode switching condition based on the current vehicle speed and the current battery level.
  4. 4. A start control method of a hybrid vehicle according to claim 3, characterized in that the step of determining whether a driver has a strong power demand based on the current accelerator opening degree includes: And under the condition that the current accelerator opening is larger than a second opening threshold and the current accelerator opening change rate is larger than a change rate threshold, determining that the driver has strong power demand.
  5. 5. The start control method of a hybrid vehicle according to claim 3, characterized in that the step of determining whether the vehicle satisfies a mode switching condition based on the current vehicle speed and the current battery level includes: and under the condition that the current vehicle speed is smaller than a speed threshold value and the current battery electric quantity is larger than an electric quantity threshold value, determining that the vehicle meets the mode switching condition.
  6. 6. The start control method of a hybrid vehicle according to claim 1, characterized by the step of controlling the clutch to be closed to switch the vehicle from the idle electric four-drive mode to a direct-drive mode, in a case where it is determined that the vehicle satisfies the mode switching condition, further comprising: And when the rotating speed of the engine meets the clutch closing condition, controlling the clutch to be closed so as to enable the vehicle to be switched from the idle electric four-drive mode to the direct-drive mode.
  7. 7. The start control method of a hybrid vehicle according to claim 6, characterized in that the step of controlling the clutch to be closed so as to switch the vehicle from the idle electric four-drive mode to the direct-drive mode in a case where the rotational speed of the engine satisfies the clutch closing condition, includes: Transmitting an boost torque request to the transmission controller in the event that the rotational speed of the engine meets the clutch closure condition, to cause the transmission controller to increase clutch torque in response to the boost torque request until the clutch is fully closed; with the clutch fully closed, it is determined that the vehicle has switched from the idle electric four-drive mode to the direct-drive mode.
  8. 8. A start control device for a hybrid vehicle, the device comprising: The system comprises a first control module, a first clutch, a second control module, a third control module, a fourth control module and a fourth control module, wherein the first control module is used for controlling the vehicle to enter an idle electric four-wheel drive mode under the condition that the vehicle is detected to be started; the first acquisition module is used for acquiring vehicle working condition data under the condition that the vehicle is determined to enter a starting state, wherein the vehicle working condition data comprises the current accelerator opening, the current vehicle speed and the current battery power; the first determining module is used for determining whether the vehicle meets a mode switching condition or not based on the vehicle working condition data; The second control module is used for controlling the clutch to be closed under the condition that the vehicle meets the mode switching condition so as to enable the vehicle to be switched from the idle electric four-drive mode to the direct-drive mode; the second control module includes: The rotating speed control sub-module is used for controlling the rotating speed of the engine to rise under the condition that the vehicle is determined to meet the mode switching condition so as to enable the rotating speed of the engine to meet the clutch closing condition; the rotational speed control submodule includes: an activation request transmitting unit configured to transmit an engine activation request to the transmission controller in a case where it is determined that the vehicle satisfies the mode switching condition; the target rotating speed acquisition unit is used for acquiring an engine rotating speed control request returned by the gearbox controller in response to the engine activation request and a target rotating speed curve; the engine speed control device comprises a speed following request sending unit, a speed following request sending unit and a speed control unit, wherein the speed following request sending unit is used for responding to an engine speed control request and sending a speed following request containing a target speed curve to an engine controller; The closing condition determining unit is used for determining that the rotating speed of the engine meets the closing condition of the clutch under the condition that clutch sliding state information sent by the gearbox controller is obtained, wherein the clutch sliding state information is generated under the condition that the gearbox controller detects that the rotating speed difference at two ends of the clutch is smaller than a rotating speed difference threshold value and the clutch is completely filled with oil.
  9. 9. A starting control system of a hybrid vehicle is characterized by comprising a whole vehicle controller, a gearbox controller and an engine controller, wherein, The whole vehicle controller is used for respectively sending a first control request to the engine controller and sending a second control request to the gearbox controller under the condition that the starting of the vehicle is detected, so as to control the vehicle to enter an idle speed electric four-wheel drive mode; the engine controller is used for responding to the first control request and controlling the engine to start and be in an idle state; the gearbox controller is used for responding to the second control request and controlling a front drive motor and a rear drive motor of the vehicle to be in a driving state and a clutch to be in a separation state; the whole vehicle controller is also used for acquiring vehicle working condition data under the condition that the vehicle is determined to enter a starting state, determining whether the vehicle meets a mode switching condition or not based on the vehicle working condition data, and sending a mode switching request to the gearbox controller under the condition that the vehicle is determined to meet the mode switching condition; the gearbox controller is also used for responding to the mode switching request and controlling the clutch to be closed so as to enable the vehicle to be switched from the idle speed electric four-wheel drive mode to a direct drive mode, and in the direct drive mode, the front drive motor, the rear drive motor and the engine are all in driving states.
  10. 10. A vehicle comprising the launch control system of the hybrid vehicle of claim 9.
  11. 11. A storage medium having stored therein machine executable instructions that when executed by a processor implement the hybrid vehicle launch control method of any one of claims 1-7.

Description

Start control method, device and system for hybrid vehicle, vehicle and storage medium Technical Field The application relates to the technical field of vehicle control, in particular to a starting control method, device and system for a hybrid vehicle, a vehicle and a storage medium. Background With the advancement of technology and the development of automobile electronics, hybrid vehicles are generally provided with a plurality of driving modes including a direct-drive mode and a pure-four-drive mode for adapting to different road conditions and driving requirements. In the related art, when a hybrid vehicle starts at a low speed and a large accelerator, the hybrid vehicle needs to be switched from a pure four-wheel drive mode to a direct drive mode, however, in the mode switching process, the engine needs to be started, and a certain time is needed from the starting of the engine to the power output, so that the starting power response is not timely, and the driver experience is poor. Disclosure of Invention The application provides a starting control method, device and system for a hybrid vehicle, the vehicle and a storage medium, and aims to solve the problem that in the related art, a certain time is required from the starting of an engine to the output of power, so that the starting power response is not timely. In order to solve the problems, the application adopts the following technical scheme: in a first aspect, an embodiment of the present application provides a start control method of a hybrid vehicle, where the method includes: Under the condition that the starting of the vehicle is detected, controlling the vehicle to enter an idle electric four-wheel drive mode, wherein in the idle electric four-wheel drive mode, a front drive motor and a rear drive motor of the vehicle are in a driving state, an engine is in an idle state, and a clutch is in a separation state; acquiring vehicle working condition data under the condition that the vehicle is determined to enter a starting state, wherein the vehicle working condition data comprises the current accelerator opening, the current vehicle speed and the current battery power; determining whether the vehicle meets a mode switching condition based on the vehicle working condition data; And under the condition that the vehicle meets the mode switching condition, controlling the clutch to be closed so as to enable the vehicle to be switched from the idle electric four-drive mode to a direct-drive mode, wherein in the direct-drive mode, the front drive motor, the rear drive motor and the engine are all in driving states. In an embodiment of the present application, after the step of controlling the vehicle to enter the idle electric four-wheel drive mode in the case where the start of the vehicle is detected, the method further includes: acquiring a current gear and a current accelerator opening of the vehicle; And determining that the vehicle enters a starting state under the condition that the current gear is a forward gear and the current accelerator opening is larger than a first opening threshold. In an embodiment of the present application, the step of determining whether the vehicle satisfies a mode switching condition based on the vehicle operating condition data includes: determining whether a strong power demand exists for a driver based on the current accelerator opening; in the case where it is determined that the driver has a strong power demand, it is determined whether the vehicle satisfies a mode switching condition based on the current vehicle speed and the current battery level. In an embodiment of the present application, the step of determining whether the driver has a strong power demand based on the current accelerator opening includes: And under the condition that the current accelerator opening is larger than a second opening threshold and the current accelerator opening change rate is larger than a change rate threshold, determining that the driver has strong power demand. In an embodiment of the present application, the step of determining whether the vehicle satisfies a mode switching condition based on the current vehicle speed and the current battery level includes: and under the condition that the current vehicle speed is smaller than a speed threshold value and the current battery electric quantity is larger than an electric quantity threshold value, determining that the vehicle meets the mode switching condition. In an embodiment of the present application, the step of controlling the clutch to be closed to switch the vehicle from the idle electric four-drive mode to the direct-drive mode in the case where it is determined that the vehicle satisfies the mode switching condition includes: Controlling the rotation speed of the engine to increase so that the rotation speed of the engine satisfies a clutch closing condition, in a case where it is determined that the vehicle satisfies the mode switching condition; And when th