Control method and control system for recovering vehicle braking coasting energy

Abstract

The invention belongs to the technical field of vehicle control and in particular relates to a control method and a control system for recycling braking sliding energy of a vehicle. The control methodfor recycling the braking sliding energy of the vehicle comprises the steps of completely loosening an accelerator pedal of the vehicle; detecting a distance value between the vehicle and a precedingvehicle by using a detection system; calculating a minimum vehicle speed value at which the braking sliding energy of the vehicle is recycled at the current distance between the vehicle and the preceding vehicle; judging whether a real-time vehicle speed of the vehicle is higher than the minimum vehicle speed value at which the braking sliding energy of the vehicle is recycled or not; if the real-time vehicle speed of the vehicle is higher than the minimum vehicle speed value at which the vehicle recycles the braking sliding energy, recycling the braking sliding energy of the vehicle. According to the control method and the control system for recycling the braking sliding energy of the vehicle, manual decision-making blindness and energy waste can be avoided, the braking sliding energy can be intelligently recycled, and the economic efficiency and intelligence of the whole vehicle are improved.

Description

technical field [0001] The invention belongs to the technical field of vehicle control, and in particular relates to a control method and a control system for recovering vehicle braking and coasting energy. Background technique [0002] The current braking and coasting energy recovery strategy of intelligent driving vehicles is generally controlled based on the driver's intention. When encountering a red light or other road conditions in the city, the driver completely releases the accelerator pedal to keep the vehicle coasting. The coasting inertia of the vehicle is used to drive the generator to generate electricity, so as to recover the coasting energy and store it in the power battery to drive the vehicle, or the vehicle uses a composite power supply or a super capacitor for the next start of the vehicle. [0003] However, the current method of recovering energy from braking and coasting based on the driver's intention has great blindness and is greatly affected by the d...

AI Technical Summary

Problems solved by technology

[0003] However, the current method of braking and coasting energy recovery based on the driver's intention is blind and is greatly affected by the driver's driving habits.

For example, when encountering a traffic light, if the distance between the vehicle in front and the vehicle in front is far, the driver releases the accelerator pedal and coasts, and the energy of the vehicle coasting is recovered, which may cause the vehicle to stop when the kinetic energy is not enough to maintain the vehicle in front

At this time, the driver needs to depress the accelerator pedal again to refuel. Considering the conversion efficiency of gasoline and electricity, energy has been wasted at this time.

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