Plug-in hybrid electric vehicle power system

Abstract

The invention discloses a plug-in hybrid electric vehicle power system with the good power matching and high working efficiency. The system is characterized by comprising a sun wheel located inside aplanetary frame, a planetary wheel rotationally installed on the planetary frame, and a gear ring planetary row located outside the planetary frame; an engine, a third gear, the planetary row, a thirdclutch, a first clutch, a first gear, a second clutch and a drive motor are sequentially arranged from left to right; the right end of the crankshaft of the engine is connected with a connecting shell through the first clutch; the third gear sleeves the crankshaft in a spaced mode, and the right end of the third gear is fixedly connected with the gear ring; the sun wheel is fixedly connected to the crankshaft of the engine, and the planetary frame is connected with the connecting shell through the third clutch; the left end of the motor shaft is fixedly connected with the connecting shell; afourth gear and a second gear are bilaterally fixedly connected to the connecting shaft in parallel and meshed with the third gear and the first gear respectively.

Description

technical field [0001] The invention relates to a hybrid electric vehicle, in particular to a power system of a plug-in hybrid electric vehicle. Background technique [0002] The power system of a plug-in hybrid electric vehicle should usually have functions such as power mode switching, matching of the engine and the drive motor, etc. The common plug-in hybrid electric vehicle power system in the market has a direct connection between the engine and the drive motor. In the hybrid mode, it is necessary to ensure that the speed of the engine and the drive motor are consistent in order to achieve better power output, and the matching is poor; It can’t give full play to the large torque of the drive motor and the role of continuous speed regulation, and it is also difficult to make the engine work in the high-efficiency zone; in the single-engine drive mode, it is difficult for the engine to work in the high-efficiency zone when it only works in one gear; in the driving power g...

AI Technical Summary

Problems solved by technology

The common plug-in hybrid electric vehicle power system in the market has a direct connection between the engine and the drive motor. In the hybrid mode, it is necessary to ensure that the speed of the engine and the drive motor are consistent in order to achieve better power output, and the matching is poor; It can’t give full play to the large torque of the drive motor and the role of continuous speed regulation, and it is also difficult to make the engine work in the high-efficiency zone; in the single-engine drive mode, it is difficult for the engine to work in the high-efficiency zone when it only works in one gear; in the driving power generation mode , the whole vehicle only works at one speed ratio at low speed and high speed, and the working efficiency of the whole power system is low

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