Patent ID: 9421966
Filing Date: 2016-08-23
CPC Classification: B60K,B60W,Y02T,Y10S

Claim Text:
1. A shifting control method for a hybrid vehicle comprising a power transmission system, the power transmission system comprising an engine, a plurality of input shafts, a plurality of output shafts, a motor shaft, and a first motor-generator, the engine being configured to selectively couple with at least one of the input shafts, a gear driving gear being set on each of the input shafts, a gear driven gear being set on each of the output shafts, the gear driven gear meshing with the gear driving gear correspondingly, the motor shaft being configured to rotate together with one of the input shafts, the first motor-generator being configured to rotate together with the motor shaft, the shifting control method comprising following steps: detecting operating parameters of the hybrid vehicle, wherein the operating parameters of the hybrid vehicle comprises vehicle speed, vehicle acceleration as reflected from an accelerator-pedal signal, and a current gear of the hybrid vehicle; determining a work mode of the hybrid vehicle; performing speed adjustment and shifting control to the first motor-generator according to a work mode and the operating parameters of the hybrid vehicle to implement shifting control of the hybrid vehicle, wherein the work mode comprises an electric-vehicle mode and a hybrid-electric-vehicle mode; and wherein performing, by the electromotor controller, PID adjustment to the first motor-generator to reduce speed-adjustment time of the first motor-generator comprises: obtaining a proportional coefficient, an integral time constant and a differential time constant of the first motor-generator when the first motor-generator outputs without load; controlling the first motor generator to increase an output load, adjusting the proportional coefficient, the integral time constant and the differential time constant when outputting without load until oscillation which the first motor-generator outputs disappears and recording a current proportional coefficient, a current integral time constant and a current differential time constant; and calculating an integral coefficient and a differential coefficient according the current proportional coefficient, the current integral time constant and the current differential time constant.