Electric vehicle hill start assist system and control method thereof

Abstract

The invention relates to auxiliary control equipment for a vehicle and a control method thereof and in particular relates to a hill starting auxiliary system for an electric vehicle. The system comprises an accelerator pedal, a brake pedal and a hand brake switch and also comprises a gradient sensor, a vehicle control unit, a weight sensor, a gear sensor, a motor controller and a motor, wherein the accelerator pedal, the brake pedal, the hand brake switch, the gradient sensor, the weight sensor and the gear sensor are electrically connected with the vehicle control unit, and the vehicle control unit is electrically connected with the motor through the motor controller. The system provided by the invention can reduce the sliding risk during hill starting, can prevent uncontrolled climbing of the vehicle to improve the driving comfort and operation convenience of the vehicle, and also can reduce the overheating damage of a motor system.

Description

technical field [0001] The invention relates to a vehicle auxiliary control device and a control method thereof, in particular to a hill start assist system for an electric vehicle. Background technique [0002] With the increasing shortage of traditional energy sources, people pay more and more attention to electric vehicles, and the development of electric vehicles has attracted more and more attention. Pure electric vehicles are driven by electric motors. In the case of temporary parking, the vehicle does not need to be driven. Like a traditional engine, it can be turned off at idle speed without consuming energy, thus saving energy. However, this technical system mainly has the following defects: since the vehicle motor has no idle speed, there may be a risk of slipping when starting on a hill. Fixing the initial additional torque according to the accelerator setting may cause the vehicle to slide downhill or automatically crawl, which is inconsistent with the driver's d...

AI Technical Summary

Problems solved by technology

[0002] With the increasing shortage of traditional energy sources, people pay more and more attention to electric vehicles, and the development of electric vehicles has attracted more and more attention. Pure electric vehicles are driven by electric motors. In the case of temporary parking, the vehicle does not need to be driven. Like a traditional engine, it can be turned off at idle speed without energy consumption, thus saving energy. However, this technical system mainly has the following defects: since the vehicle motor has no idle speed, there may be a risk of slipping when starting on a slope

However, this technical solution is the same as the existing technical solution, it can only be aimed at general vehicles, and the support for electric vehicles is not enough

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