A power coupling device for a hybrid electric vehicle

Abstract

The invention provides a power coupling device of a hybrid electric vehicle. A first differential, a second differential and a third differential comprise driving gears, driven gears, left half axle gears, right half axle gears, planetary gears and planet carriers respectively; an engine and a first motor are coaxially connected with the driving gear of the first differential; the driving gear of the first differential is meshed with the driven gear of the first differential; the left half axle gear and the right half axle gear of the first differential are coaxially connected with the driving gears of the second differential and the third differential respectively; the left half axle gear of the second differential and the right half axle gear of the third differential are connected with a left wheel and a right wheel respectively; the right half axle gear of the second differential is connected with the left half axle gear of the third differential through an axle; a reducing mechanism is also arranged on the axle; and the second motor is connected with the axle through the reducing mechanism. According to the power coupling device of the hybrid electric vehicle, a stepless speed regulation function is realized through conventional differentials, so that fuel economy and emission performance can be improved to the greatest extent.

Description

technical field [0001] The invention belongs to the field of automobile manufacturing, and relates to a power coupling device, in particular to a power coupling device of a hybrid electric vehicle. Background technique [0002] Energy saving, environmental protection and safety are the three major themes in the world today. With the increase of car ownership, the environment and energy are under great pressure. Therefore, people have been actively exploring the research and development of new energy saving and environmental protection. Pure electric vehicles are the It is an ideal substitute for traditional cars, but due to technical limitations such as battery mileage and lifespan, hybrid cars are the best substitute at this stage. [0003] Hybrid electric vehicles include two or more power sources, arranged in various ways, and can be divided into serial, parallel and hybrid types from the direction of energy flow. [0004] The series type is mainly composed of an engine,...

AI Technical Summary

Problems solved by technology

However, the power coupling device in the hybrid mode mostly uses planetary gears, or adds gearboxes, clutches and mechanical coupling devices. The structure is very complicated, and it cannot realize continuously variable transmission.

In addition, the production process of the planetary gear mechanism is relatively high, and the control is relatively complicated, which is difficult to realize

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