Electric vehicle ramp parking reminding method

A technology for electric vehicles and parking on slopes, which is applied in the direction of electric vehicles, control drive, drive interaction, etc. It can solve the problems of easy car slipping, reduce the convenience of electric vehicles, and do not have the function of parking reminder on slopes, so as to improve the vehicle safety effect

Inactive Publication Date: 2019-02-19
河北红星汽车制造有限公司
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Problems solved by technology

However, most electric vehicles do not have a slope parking reminder function. After the vehicle enters the parking mode, the motor does not rotate, and the vehicle has no noise. It is not easy for the driver to detect that the vehicle has entered the parking mode and ignores the parking brake.
In the parking slope mode, the driver leaves the vehicle or does not concentrate on dr

Method used

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  • Electric vehicle ramp parking reminding method

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[0014] Below in conjunction with accompanying drawing, the present invention will be further described.

[0015] see figure 1 As shown, the technical solution adopted in this embodiment is: a method for reminding an electric vehicle on a slope, which includes the following process:

[0016] 1. When the electric vehicle stops on the slope and enters the parking mode, the vehicle controller VCU reads the torque value output by the micro control unit MCU when the vehicle is standing on the slope, and records it as ANm;

[0017] 2. The vehicle controller VCU continuously judges whether the temperature of the micro control unit MCU or the motor temperature exceeds the preset protection threshold;

[0018] 3. When the detected amount exceeds the preset protection threshold, the vehicle controller VCU sends (A+10) Nm torque request to the micro control unit MCU, and the delay time is 200ms;

[0019] 4. After the delay time is reached, the torque request resumes the parking torque A...

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Abstract

The invention discloses an electric vehicle ramp parking reminding method. When an electric vehicle stops on a ramp and enters a ramp parking mode, a VCU reads a torque value output by an MCU and records the torque value as ANm; the VCU continuously judges whether or not the temperature of the MCU, the temperature of a motor and the like exceed a preset protection threshold value; when the detected values exceed the threshold value, vehicle vibration is caused by regular torque fluctuation, and therefore the purpose of reminding a driver to pay attention is achieved; when the detected values exceed the threshold value, the VCU controls the MCU to enter a torque control mode and sends an A+BNm torque request to the MCU, and the duration is Cms; after the delay time is reached, a torque request is sent to restore the torque to the parking torque ANm, and the duration is Cms; the above operation is repeated D times to achieve the purpose of giving a prompt to the driver; after torque fluctuation reminding is completed, the electric vehicle exits from the ramp parking mode. After acquiring a ramp parking reminding message, the driver can take a parking brake measure on the vehicle at the first time, and the safety of the vehicle is improved.

Description

technical field [0001] The invention relates to the technical field of vehicle parking on slopes, in particular to a method for reminding electric vehicles of parking on slopes. Background technique [0002] At present, most electric vehicles have the function of automatic parking on slopes. In the slope parking mode, the MCU controls the motor to stall to realize parking. However, most electric vehicles do not have a slope parking reminder function. After the vehicle enters the parking mode, the motor does not rotate, and the vehicle has no noise. It is difficult for the driver to detect that the vehicle has entered the parking mode and ignores the parking brake. In the parking slope mode, the driver leaves the vehicle or does not concentrate on driving. When the vehicle exits the parking slope mode due to MCU, motor overheating or other conditions, it is very easy to roll the car and cause an accident. In order to eliminate the potential safety hazard of the above-mention...

Claims

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Application Information

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IPC IPC(8): B60L15/20
CPCB60L15/2018B60L2240/421B60L2240/423B60L2250/10Y02T10/72
Inventor 董新龙
Owner 河北红星汽车制造有限公司
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