Braking energy recovery adjustment control method

Abstract

The invention provides a braking energy recovery adjustment control method. A whole vehicle controller collects a slope signal of a current road through a slope sensor, when the slope shows downhill and the duration time for which the slope is larger than the first set value is larger than the second set value, it is judged that a vehicle is in the long-distance downhill work condition, braking energy recovery adjustment control is started, and the whole vehicle controller decides whether an instruction for increasing the braking torque is sent to a motor controller or not through the comparison between the current vehicle speed and the target vehicle speed. The recycling rate is obviously increased especially under the rough mountain long-distance downhill driving working condition, and energy losses produced by vehicle potential energy descending are effectively recycled.

Description

technical field [0001] The invention relates to the field of energy recovery of pure electric vehicles, in particular to a braking energy recovery regulation control method. Background technique [0002] Braking energy recovery is one of the important technologies of modern new energy vehicles, and it is also an important feature of them. [0003] In a traditional internal combustion engine vehicle, when the vehicle decelerates and brakes, the kinetic energy of the vehicle is converted into heat energy through the braking system and released into the atmosphere. In energy-saving and new energy vehicles with electric drive systems, including electric vehicles and hybrid vehicles, this "wasted" braking energy can be converted into electrical energy and stored in the battery through braking energy recovery technology. It can be further converted into driving energy. For example, when the vehicle needs increased driving force (such as starting or accelerating), the driving forc...

AI Technical Summary

Problems solved by technology

The current braking energy recovery strategy cannot be adjusted for different working conditions, especially in long-distance downhill driving conditions such as winding downhill roads, it is not practical enough to still use the recovery strategy for urban flat road conditions, and Drivers need to frequently operate the accelerator pedal and brake pedal, and at the same time focus on operating the steering wheel to control the direction of the vehicle, which cannot effectively utilize the energy loss caused by the decline in vehicle potential energy, and the recovery rate needs to be optimized urgently

In addition, if the brake system works for too long, it is easy to cause brake failure, which may lead to dangerous accidents and affect the safety of the vehicle.

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