Single planet row type hybrid electric vehicle dynamic coupling mechanism and dynamic coordination control method thereof

Abstract

The invention discloses a single planet row type hybrid electric vehicle dynamic coupling mechanism and a dynamic coordination control method thereof, and belongs to the field of hybrid electric vehicle structures and control. The mechanism comprises an engine, a planetary gear mechanism, a first motor, a second motor, a clutch A, a clutch B, a brake A, a brake B, a gear A, a gear B, a first transmission shaft and a second transmission shaft; the planetary gear mechanism is composed of a sun gear, a planet carrier, a gear ring and a planet gear. By controlling combination and release of the clutches and the brakes, various working modes of the mechanism meet the requirements of complex driving working conditions of an automobile, the working efficiency of the system is improved, and the fuel economy is improved; aiming at torque fluctuation of the mechanism in the mode switching process, the invention discloses the coordination control method for reducing the impact degree, so that the driving smoothness of the automobile is improved.

Description

technical field [0001] The invention relates to the technical field of hybrid electric vehicle structure and hybrid electric vehicle control, in particular to a single planetary row power coupling mechanism and a method for dynamic coordination control thereof. Background technique [0002] In response to the call for energy saving and emission reduction policies to improve the greenhouse effect, it has become a trend to develop new energy vehicles to replace traditional vehicles that consume pure fuel. In addition, the development of new energy vehicles will also help solve my country's energy security issues and reduce foreign imports. Fuel dependence. But so far, pure electric vehicles have been limited in many ways, such as the safety of batteries and the improvement of energy density, the complexity of battery management systems, and the cost of pure electric vehicles, while hybrid vehicles can be used as traditional fuel vehicles. It is worthy of research and developme...

AI Technical Summary

Problems solved by technology

[0004] During the process of mode switching of hybrid electric vehicles, the output torque fluctuations will be caused by the hysteresis of the engine and the non-linearity in the separation and integration of clutches and brakes, and the fluctuations in output torque will cause comparisons during the driving process of the whole vehicle. big shock

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