Braking control method of hybrid electrical vehicle

Abstract

The invention relates to a braking control method of a hybrid electrical vehicle, which utilizes a brake system and an energy recovery system. The braking control method provided by the invention comprises the following steps: detecting the current speed of the vehicle by utilizing a vehicle speed detecting device; detecting a brake pedal stroke by utilizing a brake pedal stroke detecting device; and not recovering the braking energy when the current speed is lower than a starting value, and otherwise, distributing the braking energy based on brake pedal stroke according to the corresponding stroke braking control requirements and controlling the operation of the brake system and energy recovery system according to the distributed braking moment. The control method provided by the invention distributes the braking moment according to the brake pedal stroke, so that the energy recovery system and the original brake system are organically combined into a whole, thereby avoiding the inconsistent switching between the energy recovery system and the original brake system. Thus, a driver can realize stable braking feeling and braking effect and can drive the vehicle conveniently, safely and reliably.

Description

technical field [0001] The invention relates to a hybrid electric vehicle, in particular to a braking control method for a hybrid electric vehicle. Background technique [0002] When a hybrid vehicle brakes or decelerates, its braking energy can be converted into electrical energy and stored in the battery (called braking energy recovery) to reduce fuel consumption. The electrical energy stored in the battery is used to start and accelerate the vehicle to reduce engine load and improve fuel economy. In order to increase the amount of energy recovered during vehicle braking and deceleration, a braking energy recovery braking system has been developed. The control of this brake system is composed of the energy recovery system of the hydraulic brake of the original engine model and the motor (acting as a generator during deceleration and braking). However, at present, the energy recovery system is not coordinated with the switching of hydraulic brakes, which makes the driver ...

AI Technical Summary

Problems solved by technology

However, at present, the energy recovery system is not coordinated with the switching of hydraulic brakes, which makes the driver experience different braking feelings. At the same time, although the vehicle still has full braking capacity, the driver will also feel that this situation is the failure of the brake system and requires It is relatively difficult to adjust its own braking action to adapt to the change of braking effect, which affects driving safety. This is also a problem faced by hybrid vehicles at present.

Images