A plug-in hybrid electric vehicle powertrain

Abstract

The invention provides a plug-in hybrid-electric-vehicle power assembly with better power matching property. A crankshaft of an engine is connected with a first clutch and a first sun wheel of a first planet row in sequence from left to right; a motor shaft of a driving motor penetrates through a second planet carrier of a second planet row from left to right and then is fixedly connected with a second sun wheel; a second gear and a fourth gear are fixedly arranged on a connecting shaft in parallel from left to right; the right end of the connecting shaft is connected with a transmission by a second clutch; a first gear and a third gear are respectively and fixedly connected with a first gear ring of the first planet row and a second planet carrier of the second planet row, and are respectively meshed with the second gear and the fourth gear; a first planet carrier of the first planet row and the second planet carrier of the second planet row are fixedly connected and are connected with a brake by an outer edge; and the first sun wheel of the first planet row is positioned in the first planet carrier, a first planet wheel is rotationally arranged on the first planet carrier, the first gear ring is positioned outside the first planet carrier and the second sun wheel of the second planet row is positioned in the second planet carrier.

Description

technical field [0001] The invention relates to a hybrid electric vehicle, in particular to a plug-in hybrid electric vehicle power assembly. Background technique [0002] The plug-in hybrid vehicle powertrain should usually have functions such as power mode switching and matching of the engine and the drive motor. For this reason, the common plug-in hybrid electric vehicle powertrain on the market has its engine and drive motor directly connected. In hybrid mode, it is necessary to ensure that the power speeds of the engine and the drive motor are consistent to achieve better power output. The matching is poor, and the drive motor can not fully play the role of high torque and continuous speed regulation; in the hybrid mode, the change of the transmission ratio is discontinuous, and there is a shift shock, and it is difficult to make the engine work in the high-efficiency area, so the shift smoothness is poor. And the work efficiency is not high; at the same time, the engi...

AI Technical Summary

Problems solved by technology

For this reason, the common plug-in hybrid electric vehicle powertrain on the market has its engine directly connected to the drive motor. In the hybrid mode, it is necessary to ensure that the power speed of the engine and the drive motor are consistent at the same time to achieve better power output. The matching is poor, and the driving motor has a 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 when switching between the three power modes of single engine, pure electric and hybrid power, it will have a great impact on the power system, and it is often difficult to complete the smooth switching

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