Double-clutching two-gear speed transforming transmission and double-clutching method of speed transforming transmission

Abstract

The invention relates to the field of an electric automobile and particularly relates to a double-clutching two-gear speed transforming transmission and a double-clutching method of the speed transforming transmission. The double-clutching two-gear speed transforming transmission comprises a box body, wherein the box body is internally provided with an input shaft, a first driving gear sleeved on the input shaft, an output shaft and a second driven gear sleeved on the output shaft; the input shaft is connected with the output shaft through a first clutch; the double-clutching two-gear speed transforming transmission is further provided with a first middle shaft, a first driven gear sleeved on the first middle shaft, a second middle shaft and a second driven gear sleeved on the second middle shaft; the first middle shaft is connected with the second middle shaft through a second clutch; and the first driving gear is engaged with the first driven gear and the second driving gear is engaged with the second driven gear. According to the double-clutching method, the requirements of an electric state and a power generation state of a motor on the change of a rotary-speed torque are considered, so that the motor can maintain efficient and stable working states when operating at the electric state and the power generation state.

Description

technical field [0001] The invention relates to the field of electric vehicles, and more specifically relates to a dual-clutch two-speed transmission device for electric vehicle transmission and a dual-clutch method for the transmission device. Background technique [0002] Cars are already an indispensable means of transportation for human beings, but with global warming and the increase in oil costs, people are forced to invest a lot of money in the development and research of electric vehicles to alleviate human dependence on oil and reduce environmental pollution. Traditional electric vehicles have two modes of DC and AC. The DC electric control system and the AC electric control system are the basic components to control the driving speed of electric vehicles. Although this electrical control system can adjust the speed of the motor to control the speed of the vehicle, it cannot change the difference. Different road conditions require different transmission torques. ...

AI Technical Summary

Problems solved by technology

When the electric vehicle is in the state of traction drive, the operating efficiency of the motor is the highest in the rated load and rated speed area, but in actual operation, the motor often operates at a low load and low speed, and a large amount of energy is consumed in copper consumption and In terms of iron loss, the maximum operating efficiency of the traction motor cannot be achieved

When the electric vehicle is in the braking state, the kinetic energy can be converted into electric energy to charge the battery pack, that is, energy recovery is performed on the electric vehicle. During the energy recovery process, according to the motor working efficiency curve, it is known that the motor can only work at the best efficiency In order to recover the braking energy effectively, the motor speed must be in the best efficiency range. When the motor speed is lower than the minimum speed required to reach a certain best efficiency range, this part of the braking energy cannot be recovered, which will greatly Reduced energy recovery efficiency

Images