Dual-motor multi-mode composite front-drive plug-in hybrid system

Abstract

The invention discloses a dual-motor multi-mode composite forerunner plug-in hybrid power system; an engine, an elastic damper, a clutch, a first motor, a first planet row, a second planet row, a third planet row and a second motor are coaxially arranged in order; a first brake connecting plate is connected with the output shaft of the first motor; a second brake connecting plate is connected with the first planet row; a third brake connecting plate is connected with the third planet row; a fourth brake connecting plate is respectively connected with the first, second and third planet rows; a fifth brake connecting plate is connected with the output shaft of the second motor; the third planet row is connected with an output gear set; the output gear set is respectively connected with a left output semiaxis and a right output semiaxis. The dual-motor multi-mode composite forerunner plug-in hybrid power system is more reasonable in configuration, more compact in structure, low in loss, high in reliability, and can realize the following work modes: an engine multi-speed ratio separate drive mode, an engine-motor multi-gradient combined ECVT drive mode, and a multi-speed ratio single motor-driven mode.

Description

technical field [0001] The invention relates to the field of automobile manufacturing, in particular to a dual-motor multi-mode composite front-drive plug-in hybrid power system. Background technique [0002] As environmental pollution and energy problems become more and more serious, countries around the world have successively issued strategic plans for the development of new energy vehicles. Automobile companies have also actively responded to this development strategy and actively researched and developed energy-saving and environmentally friendly vehicles, mainly involving pure electric vehicles and plug-in hybrid vehicles. power car. However, at the present stage, pure electric vehicles cannot be overcome due to problems such as high battery cost, low energy density, long charging time, and limited cruising range. Therefore, it will be difficult to popularize them in large quantities within a certain period of time. The technically relatively mature hybrid power syste...

AI Technical Summary

Problems solved by technology

[0003] However, in the existing plug-in hybrid electric vehicle power plant, when the engine is driven alone, the speed ratio is single, it is difficult to give full play to the high-efficiency area of ​​the engine, and the fuel efficiency cannot be further improved when the engine is directly driven alone; when the engine is driven, the first motor The second motor and the second motor have been following the rotation, resulting in a significant reduction in the life of the motor rotor bearing and a large system loss; the first motor and the second motor have low operating speed and high torque, and there are problems of low efficiency, large size, and high cost; pure electric motors When driving, the driving speed of the single motor is too high, there are problems such as low system efficiency, large mechanical loss, and short life of the rotor bearing; and problems such as the inability of the first motor, the second motor and the engine to realize the multi-gradient ECVT function

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