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A method and device for realizing auxiliary control of vehicle uphill start

An auxiliary control and hill start technology, applied in hybrid vehicles, motor vehicles, transportation and packaging, etc., can solve problems such as easy slippery slopes, and achieve the effect of meeting torque requirements

Active Publication Date: 2022-03-25
SAIC MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the embodiment of the present application provides a method and device for realizing auxiliary control of vehicle uphill start, so as to solve the technical problem in the prior art that the uphill start is easy to slide

Method used

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  • A method and device for realizing auxiliary control of vehicle uphill start
  • A method and device for realizing auxiliary control of vehicle uphill start
  • A method and device for realizing auxiliary control of vehicle uphill start

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Embodiment 1

[0070] An embodiment of the present application provides a method for realizing assist control of a vehicle starting uphill. see figure 1 , which shows a schematic flow chart of a method for realizing assisting control of a vehicle's uphill start, which may include the following steps S201-S204:

[0071] S201: When the gear state of the vehicle is in the driving gear, calculate the current slope according to the acceleration of the vehicle.

[0072] In this embodiment, the vehicle controller can judge the gear state of the hybrid vehicle at this time according to the signal input by the gear controller of the vehicle. If the vehicle is determined to be in the driving gear through the judgment, it indicates that the vehicle is ready to start. At this time, the vehicle controller can calculate the current slope of the vehicle according to the vehicle acceleration signal input by the acceleration sensor.

[0073] In an implementation of this embodiment, see image 3 , which is...

Embodiment 2

[0121] For specific implementation scenarios, see Figure 7 , which is a flow chart of another method for assisting control of an uphill start of a vehicle according to an embodiment of the present application.

[0122] like Figure 7 As shown, the vehicle controller first detects the gear state of the hybrid electric vehicle, and if it is detected that the gear state is the driving gear, then enter the next step, otherwise it will repeat the detection of this step; then, the vehicle controller Detect whether the current road is a slope, if it is detected that the current road is a slope, then enter the next step, otherwise the detection of this step will be repeated; then, the vehicle controller calculates the required torque value, and detect whether the motor of the hybrid vehicle can provide the torque for the vehicle to start on a hill, if the motor can provide the torque for the vehicle to start on a hill, then enter the next step, otherwise the vehicle controller sends...

Embodiment 3

[0125] see Figure 8 , which is a schematic diagram of the composition of a vehicle uphill start assist control device provided in the embodiment of the present application, and the device includes:

[0126] The first calculation unit 801 is used to calculate the current slope according to the vehicle acceleration when the vehicle gear position is in the drive gear;

[0127] The first detection unit 802 is configured to detect the opening of the brake pedal when the current slope reaches the first threshold;

[0128] The second calculation unit 803 is configured to calculate the first target torque by using double closed-loop control when the brake pedal opening reaches a second threshold;

[0129] The first distributing unit 804 is configured to split the first target torque into a first engine target torque and a first motor target torque, send the first engine target torque to the engine controller, and send the first motor target torque to the engine controller. The targ...

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Abstract

The embodiment of the present application discloses a method and device for realizing the auxiliary control of vehicle uphill start. The method includes: when the vehicle starts, estimating the current slope, and if the vehicle is on a slope, activate the uphill start auxiliary control function, and further detect the brake. Pedal opening, when the opening of the brake pedal reaches the threshold, enter the zero speed control mode, and distribute the first target torque to the motor and engine, so that the vehicle can be maintained at zero speed without slipping; then detect the opening of the accelerator pedal, Determine the driver's request torque and creep required torque, determine the second target torque according to the driver's requested torque and creep required torque, and distribute it to the motor and engine, so as to realize the uphill auxiliary start control of hybrid vehicles without generating slippery slope.

Description

technical field [0001] The present application relates to the technical field of vehicle control, and in particular to a method and device for realizing auxiliary control of a vehicle starting uphill. Background technique [0002] A hybrid vehicle is equipped with an engine and a drive motor as a power source. Users can choose a pure electric driving mode that uses only the motor to drive, or a parallel drive mode that uses the engine and the motor to drive. For hybrid vehicles, when the vehicle starts on a slope, if the handbrake is not used, when the right foot is off the brake pedal and the accelerator is stepped on, due to the filtering of the driver's torque analysis, the torque response is lagging, and the vehicle will appear different degrees. slipping behind the car, it is easy to cause a rear-end collision accident. In the prior art, there is no specific control method for the uphill auxiliary start of hybrid vehicles. Starting on a slope, especially in steep slope...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W30/18B60W40/076B60W40/10B60W10/06B60W10/08B60W20/00
CPCB60W30/18B60W40/076B60W40/10B60W10/06B60W10/08B60W20/00Y02T10/62
Inventor 王林窦希江凌俊威王浩何雄晋碧瑄
Owner SAIC MOTOR
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