Coordination control method and system for gear switching and work pattern switching and vehicle

Abstract

The invention discloses a coordination control method and system for gear switching and work pattern switching and a vehicle. The method comprises the steps that whether a hybrid electric vehicle sends out a gear switching request and a work pattern switching request is judged; if the gear switching request and the work pattern switching request are sent out simultaneously, the current gear is switched to a target gear according to the gear switching request, and the rotating speed of an engine is regulated at the same time; after the target gear is switched to, the current rotating speed of a driving motor and the current rotating speed of the engine are compared; if the difference between the current rotating speed of the driving motor and the current rotating speed of the engine is smaller than a preset threshold, regulation of the rotating speed of the engine is stopped, and a clutch between the driving motor and the engine is controlled to be in a combined state. According to the method, the service life of the clutch can be prolonged, noise can be lowered, and the economical efficiency, dynamic property and smoothness of the whole vehicle can be improved.

Description

technical field [0001] The invention relates to the technical field of hybrid electric vehicles, in particular to a coordinated control method, system and vehicle for gear shift switching and working mode switching. Background technique [0002] Hybrid refers to the use of both fuel-driven and electric-driven vehicles. Due to the combination of the advantages of fuel vehicles and pure electric vehicles, hybrid vehicles have gradually become the research object of major automobile manufacturers. [0003] Compared with traditional fuel vehicles and pure electric vehicles, hybrid vehicles can not only switch gears, but also switch working modes. For example, when the power demand of the whole vehicle increases, it can switch from the pure electric mode driven by electricity alone to the hybrid mode driven by both fuel and electricity. At present, when a hybrid electric vehicle has both gear shifting and working mode switching needs, the gear shifting or working mode switching...

AI Technical Summary

Problems solved by technology

[0004] However, in the process of shifting gears and switching working modes, it is necessary to disengage and combine the clutches, which will cause power changes and torque fluctuations of the vehicle.

However, when gear shifting and working mode switching are performed separately, the number of separation and engagement of the clutch is more, and the power changes and torque fluctuations of the vehicle are also more

This will undoubtedly reduce the service life of the clutch and make the vehicle emit more noise. At the same time, the fuel consumption of the vehicle will increase, and the power and smoothness will also be affected.

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