Hill-starting assisting control method and device

A technology for starting on a ramp and assisting control, which is applied in the control of driving, transportation and packaging, electric vehicles, etc., can solve problems such as difficulty in starting, and achieve the effect of reducing the difficulty of operation.

Inactive Publication Date: 2016-06-29
CHONGQING CHANGAN AUTOMOBILE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When the vehicle starts on a hill, the vehicle will roll backwards when the driver switches from the brake pedal to the accelerator pedal in neutral, making it difficult to start

Method used

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  • Hill-starting assisting control method and device

Examples

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Embodiment Construction

[0038] When the vehicle is parked on the ramp, it will be affected by the component force F1 perpendicular to the road surface and the component force F2 downward along the road surface generated by the gravity G. Its static force diagram is as follows figure 1 shown. Under the action of F1, the vehicle is subjected to static friction force upward along the road surface, which will try to prevent the vehicle from moving; but if the slope of the ramp on which the vehicle is located When F2>F1 is large to a certain extent, it will cause the vehicle to slip backwards, so in If it is larger (ie F2>F1), the driver must step on the brake pedal to keep the vehicle stationary.

[0039] However, when the vehicle starts on a slope, the driver needs to release the brake pedal and then depress the accelerator pedal, while the In larger cases, the vehicle will inevitably roll when the driver switches from the brake pedal to the accelerator pedal, so it is necessary to activate the hil...

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PUM

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Abstract

The invention discloses a hill-starting assisting control method and a hill-starting assisting control device. The method comprises the following steps: judging whether a vehicle meets a hill-starting assisting control condition; if the vehicle meets the hill-starting assisting control condition, acquiring a gradient of the vehicle on a slope, and calculating a hill-starting assisting torque according to the gradient of the vehicle on the slope, wherein the hill-starting assisting torque is a motor output torque required for keeping the vehicle static; controlling a motor to output the hill-starting assisting torque, and starting to control the motor to output the motor output torque supplied by the accelerator pedal until the motor output torque supplied by an accelerator pedal is greater than or equal to the hill-starting assisting torque, so that safe starting of the vehicle on the slope is realized.

Description

technical field [0001] The present invention relates to the technical field of vehicle control, and more specifically, to a hill start assist control method and device. Background technique [0002] When the vehicle starts on a hill, the vehicle will roll backwards when the driver switches from the brake pedal to the accelerator pedal in neutral, making it difficult to start. Therefore, it is necessary to configure the vehicle with a hill start assist function, which is used to provide certain assistance when the vehicle starts on a slope, so that the vehicle can start safely on the slope. Contents of the invention [0003] In view of this, the present invention provides a hill start assist control method and device, so as to enable the vehicle to start safely on a hill. [0004] A hill start assist control method, comprising: [0005] Judging whether the vehicle satisfies the hill start assistance condition; [0006] If it is judged that the vehicle satisfies the hill ...

Claims

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Application Information

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IPC IPC(8): B60W30/18B60W40/00B60W40/076B60W40/105B60L15/20
CPCB60W30/18009B60W40/00B60W40/076B60W40/105B60L15/2063B60W2510/081B60W2710/083Y02T10/72
Inventor 田雪勇梁伟李宗华刘杰杨官龙
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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