Hybrid electric vehicle parallel mode shift control method and system

Abstract

The invention discloses a method and system for gear shifting control of a hybrid car in a parallel connection mode. The method comprises the following steps: when the detected car speed meets a gear shifting condition, power sources are controlled to be unloaded; a clutch is controlled to be disengaged; the hybrid gear is controlled to be put into an idle gear; after the idle gear is engaged, the rotating speed of a driving motor is controlled to be adjusted to a target rotating speed; the adjusted actual rotating speed of the driving motor is taken as the target rotating speed, and the rotating speeds of an engine and an ISG motor are adjusted; after the adjustment, the hybrid car is put into a target gear; after the target gear is engaged, the clutch is controlled to be engaged, so that a gear shifting process is finished. The method and system have the advantages that the technical problems that in the prior art, the possibility of power source control conflict is high, so that the engine and the ISG motor are not integrated for control, and the conventional control process is complex can be solved; a gearbox controller is utilized for controlling the torque of the clutch and power sources during the gear shifting process, an active rotating speed adjustment process is added, and the engine and the ISG motor are integrated for control, so that the control during the gear shifting process is simple, the gear shifting time is shortened, and smooth gear shifting is realized.

Description

technical field [0001] The invention relates to the technical field of vehicle control. Specifically, it relates to a method and system for controlling shifting in a parallel mode of a hybrid electric vehicle. Background technique [0002] A hybrid vehicle refers to a vehicle that has at least two power sources and uses one or more of them to provide part or all of the power. Most existing hybrid vehicles use traditional internal combustion engines and electric motors as power sources. [0003] Such as figure 1 Shown is the structure of the existing automotive hybrid power system, the solid line represents the mechanical connection, and the dotted line represents the control signal, which includes the engine, clutch, clutch actuator, ISG motor, drive motor, AMT gearbox and final drive. The hybrid power system is a dual-motor single-clutch mode, and the control system is complicated, but it can realize the switching of various modes such as pure electric, series, parallel, ...

AI Technical Summary

Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is that in the existing parallel mode shift control method, power source control conflicts are easily caused, there is no active speed regulation process, which leads to long clutch engagement process, large wear, and the engine and ISG motor are not used as The overall control leads to complex control process, so a gearbox controller is proposed to control the torque of the power source, and the active speed regulation process of the engine and the motor is added. The gearbox controller takes the demand torque of the engine and the ISG motor as a whole. Hybrid electric vehicle parallel mode shift control method and system for controlling

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