Hybrid power vehicle driving system and engine start control method thereof

Abstract

The invention discloses a plug-in hybrid power vehicle driving system. A brand-new planetary wheel power coupling device is adopted, the engine start time is taken as a target, and the torque of a driving motor, the torque capacity of a clutch and a brake of a coupling mechanism as well as the engine ignition time are controlled so as to realize quick start of an engine and smoothing intervention of the engine to entire vehicle driving, thereby solving the problem that the driving system is impacted in an engine start process. The system adopts a single motor to realize the functions of a hybrid power vehicle, so that the entire vehicle cost is low; the planetary wheel power coupling device is integrated with a gearbox, and the clutch and the brake are integrated with the motor, so that the structure is compact, the axial size is small, and the arrangement is convenient; and in the engine start process, the inertia torque of the driving motor is fully utilized for compensating the torque required by engine start, thereby reducing the reserved torque of the driving motor for starting the engine and improving the dynamic property and driving property of the entire vehicle.

Description

technical field [0001] The invention belongs to the technical field of hybrid electric vehicles. More specifically, the present invention relates to a hybrid vehicle drive system. In addition, the present invention also relates to the engine startup control method of the drive system of the hybrid electric vehicle. Background technique [0002] The energy crisis, the greenhouse effect and the increasingly severe environmental situation are important factors restricting the development of the global economy. The study of energy-saving and environmentally friendly new energy vehicles is one of the effective means to solve the above problems. Plug-in hybrid electric vehicles take into account the advantages of both internal combustion engines and pure electric vehicles, and have the advantages of low fuel consumption, low emissions and long mileage, and are currently a feasible solution. [0003] The structure of plug-in hybrid electric vehicle drive system mainly includes s...

AI Technical Summary

Problems solved by technology

[0004] 1. The series structure is characterized by: the engine is mechanically decoupled from the drive train, and the engine directly drives the generator to supply power to the energy storage device or the drive motor; the disadvantage of the series structure is: low system efficiency, and high vehicle cost due to the dual-motor system ;

[0005] 2. The characteristics of the hybrid structure are: the power of the engine can be divided, part of which is used to drive the whole vehicle, and part of it is used to drive the generator to generate electricity; the disadvantage of the hybrid system is that the dual-motor system leads to high vehicle costs and complicated system control ;

It takes a long time for the invention to start the engine and intervene in the demand of the whole vehicle, and the cost of the whole vehicle is high because it is equipped with dual motors

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