Plug-in hybrid electric vehicle transmission adopting two-gear wet clutches

Abstract

The invention discloses a plug-in hybrid electric vehicle transmission adopting two-gear wet clutches. An ISG motor and a drive motor are integrated in the transmission. When an engine is started, the ISG motor can be driven to generate electricity, generated electric energy is stored in a storage battery or is directly supplied to the drive motor, and power of the engine and power of the drive motor are coupled through a first wet clutch assembly and drive a vehicle together. The transmission has two gears, namely, the high-speed gear and the low-speed gear, and connection can be selected through a second wet clutch assembly. The transmission is suitable for being installed on the front-engine front-wheel drive layout vehicle, the structure is compact, and therefore the space for independently arranging the motor is omitted, the space utilization rate is greatly increased, the economical efficiency and the dynamic property of a whole power coupling device are improved to a certain extent, the power access can be more stable, the gear shifting impact is small, and reliability is high.

Description

technical field [0001] The invention relates to the field of new energy vehicles, in particular to a transmission for a plug-in hybrid electric vehicle using a two-speed wet clutch. Background technique [0002] With the increasingly acute contradiction between energy supply and demand and the continuous deterioration of the ecological environment, people are beginning to realize that the increasing number of cars is causing serious human survival problems. Global warming, air pollution, and energy depletion have become the primary concerns of people. Therefore, in order to solve the above contradictions and alleviate the energy crisis, people are more committed to the development of efficient, clean and safe means of transportation, so new energy vehicles have been proposed as a representative means of transportation to replace traditional internal combustion engine vehicles in the future. New energy vehicles mainly include pure electric vehicles, fuel cell vehicles and hy...

AI Technical Summary

Problems solved by technology

Existing hybrid vehicles have both an engine drive part and an electric motor drive part, and the transmission system has a complex structure and takes up a lot of space

[0004] Since the electric motor is usually arranged between the engine and the transmission, the axial dimension increases and the arrangement is more difficult. At the same time, due to the limitation of the axial dimension, the size of the driving motor is small and the driving power is limited.

Furthermore, the usual hybrid electric vehicle power coupling device is generally a fixed speed ratio gear transmission, and the transmission speed ratio is single, which cannot fully meet the requirements of economy and power.

Images