4DHT hybrid electric vehicle transmission

Abstract

A 4DHT hybrid electric vehicle transmission comprises a flywheel damper, an engine connection clutch, planetary gear sets, gear rings, planet carriers, sun gears, planetary gear set control clutches, starting function, driving function and power generating function integrated motors, motor shafts, brakes, input shafts, a first output shaft, a first output shaft clutch, a second output shaft, a second output shaft clutch, a single-way clutch, a locking clutch and a differential. The gear rings, the planet carriers and the sun gears are arranged in the planetary gear sets which are used for power synthesis, and the planetary gear set control clutches are arranged between the gear rings and the planet carriers to control relative movement or fixation of the gear rings, the planet carriers and the sun gears. The motor shafts are used for connection with the motors and the sun gears, and the brakes are used for controlling fixation and rotation of the gear rings. By control of an engine, the motors and each torque control element, functions of pure motor driving, engine driving, hybrid power driving, power generating in vehicular static state and running state, energy recovering and the like of a vehicle are realized.

Description

technical field [0001] The invention belongs to the field of automobile transmissions, in particular to hybrid transmissions for new energy vehicles. Background technique [0002] The transmission is the most important transmission component in the power transmission system of the car. The performance of the transmission directly determines the performance of the car, determines the transmission efficiency of the car, determines the fuel economy of the car, and determines the smoothness and comfort of the car's gear shifting. According to relevant national policies, the development direction of future automobiles will be mainly hybrid electric vehicles and pure electric vehicles, but due to the problem of power batteries, hybrid electric vehicles will be the main direction of future automobile development. At present, the more advanced and representative transmission technologies for hybrid electric vehicles mainly include Honda's i-MMD and Toyota's E-CVT. The fuel consumpt...

AI Technical Summary

Problems solved by technology

[0003] Although there are many inventions of hybrid transmission technology at home and abroad, and these inventions have achieved obvious technological progress and economic effects, their structure still has shortcomings. For example, the second motor of Toyota's ECVT needs to generate electricity to offset the The power loss of the first motor doing useless work; another example is that in Honda's i-MMD system, the engine is only suitable for direct drive when cruising at high speed, and the other working conditions are to drive the generator to generate electricity, so there is a loss of mechanical energy converted to electrical energy, and the battery is charged. loss, loss of battery discharge, loss of electrical energy to mechanical energy

Moreover, Toyota's ECVT and Honda's i-MMD both use a fixed transmission ratio, and only use the large speed regulation range of the motor for stepless transmission. The speed regulation range is limited, and it is difficult to ensure that the motor works in the highest efficiency range. Both power and economy are affected

Images