An energy recovery control method for a dual planetary row four-shaft hybrid power system

Abstract

The invention discloses an energy recovery control method of a double-planet-row four-axis hybrid power system. The method comprises the following steps: an automobile enters a purely electric braking mode opened by a first brake if the automobile is in a purely electric operating mode before being braked and the first brake is in an open mode when the automobile is braked, the automobile enters a purely electric braking mode locked by the first brake if the automobile is in the purely electric operating mode before being braked and the first brake is in a locking state, the automobile enters a hybrid power braking mode opened by a second brake if the automobile is in a hybrid power operating mode and the second brake is in a starting mode, and the automobile enters a hybrid power braking mode locked by the second brake if the automobile is in the hybrid power operating mode and the second brake is in a locking mode. The method can select the corresponding braking mode according to different operating modes of the automobile before braking, and can avoid the situation of high rotating speed and low torque of a motor in the condition of high vehicle speed, thereby improving the energy recovery efficiency.

Description

technical field [0001] The invention relates to the technical field of braking energy recovery of energy vehicles, in particular to an energy recovery control method for a dual-planetary four-axis hybrid power system. Background technique [0002] During the braking process of the vehicle, under the inertia of the vehicle, the wheel drives the outer ring gear to rotate, and the motor coupled with the outer ring gear rotates accordingly, generating electromotive force and forming a charging current. The battery recovers this part of electric energy and stores it in the battery. The motor can perform single-motor braking and power generation or dual-motor combined braking and power generation under the control command. [0003] In the prior art, only one electric motor is used for braking energy recovery. When the vehicle speed is high, the rotational speed of the electric motor is also high, so that the electric braking torque that the electric motor can provide is relatively...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the technical problems of the current energy recovery control method that the motor torque is small and the energy recovery effect is poor when the vehicle speed is high, and provides an energy recovery control method for a dual-planetary four-axis hybrid power system, which can be based on Select the corresponding braking mode for the different operating modes of the car before braking, which can avoid the situation of high speed and low torque of the motor at high speed, thereby improving energy recovery efficiency

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