A multi-mode hybrid power transmission

Abstract

The invention relates to a multi-mode hybrid power transmission device comprising a single-line planetary wheel mechanism, a double-clutch speed change mechanism, a differential, an engine and a motor. According to the multi-mode hybrid power transmission device, 13 working modes are achieved, wherein six modes of transmission output and three modes of braking are achieved, and four or more modesof transmission ratio output are achieved; decoupling of the engine and the wheel edge rotational speed is achieved, the engine is easier to control in the high efficiency interval; more modes can beachieved through more transmission paths; and by coordinating the torque of the engine and the motor, the engine and the motor can always work in the high efficiency interval, and thus the higher system efficiency is achieved.

Description

technical field [0001] The invention belongs to the technical field of automobile power transmission, and in particular relates to a multi-mode hybrid power transmission device. Background technique [0002] Hybrid vehicles are one of the important directions for the development of new energy vehicles. The significance of new energy vehicles is to use the auxiliary function of the motor to make the engine always work in the high-efficiency range, and the motor can make up for the insufficient power, or use the surplus power for power generation. In order to improve the efficiency of the entire system, it is quite difficult to make the engine and electric motor as the power source always work in the high-efficiency range under complex working conditions. [0003] The most typical structure of the current single-motor hybrid powertrain is a parallel structure, and there is also a planetary gear structure such as Arrizo 7e. The problem with the former is that the engine speed ...

AI Technical Summary

Problems solved by technology

The problem with the former is that the engine speed cannot be decoupled from the wheel speed, and the engine and motor cannot always work in the high-efficiency range. The economy and power of the car are not good. Although some structures have added a gearbox with a fixed transmission ratio or a continuous gearbox, it still cannot fundamentally solve the problem that the engine speed and the wheel speed are not decoupled; while the latter The problem is that although the planetary gear structure is adopted, the power of the motor is too small, the transmission path is limited, and the economy of the whole vehicle cannot be fully guaranteed, and because the power of the engine is too large relative to the motor, the existing structure cannot be well matched. And in the end, the power of the whole car is not good.

The structure of dual motors is typical of Prius, and its overall transmission efficiency is very high, but there is a defect of insufficient power

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