A drive system for a hybrid electric vehicle

Abstract

The invention provides a driving system of a hybrid power vehicle. The driving system of the hybrid power vehicle is excellent in power matching property, good in shifting smoothness, high in working efficiency. A crank shaft of an engine is connected with a clutch and a first sun wheel of a first planet row in sequence from left to right, a motor shaft of a driving motor is fixedly linked with a second sun wheel of a second planet row, a first gear and a third gear are fixedly linked with a first planet carrier of the first planet row and a second planet carrier of the second planet row respectively and meshed with a second gear and a fourth gear respectively, the second gear and the fourth gear are fixed installed on a connecting shaft in a side-by-side mode, the right end of the connecting shaft is linked with a brake, first gear rings of the first planet row and second gear rings of the second planet row are fixedly linked with each other and fixedly linked with outer gear rings through outside edges, the tooth number of the first sun wheel of the first planet row and the tooth number of the second sun wheel of the second planet row are different, or the tooth number of the first gear rings of the first planet row and the tooth number of the second gear rings of the second planet row are different.

Description

technical field [0001] The invention relates to a hybrid electric vehicle, in particular to a driving system of a hybrid electric vehicle. Background technique [0002] The drive system of a hybrid electric vehicle should usually have functions such as power mode switching, matching of the engine and the drive motor, etc. For this reason, in the drive system of hybrid electric vehicles that are common on the market, the engine is directly connected to the drive motor. Give full play to the role of the drive motor with large torque and continuous speed regulation; in the hybrid mode, the transmission ratio changes discontinuously, there is a shift shock, and it is difficult to make the engine work in a high-efficiency zone, so the smoothness of shifting is poor and the work efficiency is not high; At the same time, the engine is directly connected to the drive motor, and the switching between the single engine, pure electric and hybrid power modes has a great impact on the p...

AI Technical Summary

Problems solved by technology

For this reason, in the drive system of hybrid electric vehicles that are common on the market, the engine and the drive motor are directly connected. Give full play to the role of the drive motor with large torque and continuous speed regulation; in the hybrid mode, the transmission ratio changes discontinuously, there is a shift shock, and it is difficult to make the engine work in a high-efficiency zone, so the smoothness of shifting is poor and the work efficiency is not high; At the same time, the engine and the drive motor are directly connected, and the impact on the power system is great when switching between the three power modes of single engine, pure electric and hybrid power, and it is often difficult to complete the smooth switching

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