A kind of electric vehicle transmission and transmission method

A technology for electric vehicles and transmissions, applied in vehicle components, control devices, transportation and packaging, etc., can solve the problems of large wear of the friction plates of brakes and clutches, large changes in the rotor speed of the motor, and burnout of the motor. capacity, increase the maximum speed, and prolong the service life
CN104276033BActive Publication Date: 2017-06-16HUNAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUNAN UNIV
Publication Date
2017-06-16

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Abstract

The invention discloses an electric vehicle transmission and a speed changing method thereof, comprising a hydraulic torque converter with a locking function, a planetary gear mechanism, an oil pump, an oil pump motor, a controller, a speed reduction mechanism and a differential. The hydraulic torque converter with lock-up function includes a pump wheel, a turbine, an input shaft, an output shaft, etc., the drive motor is connected to the pump wheel through the input shaft, and the turbine is connected to the output shaft. The torque on the output shaft is transmitted to the planetary gear mechanism. The planetary gear mechanism includes sun gear, planet carrier, large ring gear, clutch, brake and other parts. The torque is output from the planet carrier through the planetary gear mechanism, and drives the vehicle to travel after passing through the reduction mechanism and the differential. The transmission can realize two mechanical transmission gears and one hydraulic torque conversion gear. The oil pump is used to provide pressure to the transmission hydraulic system. The electric vehicle transmission of the invention can improve the climbing performance and acceleration performance of the electric vehicle, and at the same time enhance the reliability of the vehicle.
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Description

technical field

[0001] The invention relates to an automobile transmission and a speed changing method, in particular to a transmission and a speed changing method suitable for pure electric vehicles. Background technique

[0002] The development of energy-saving and new energy vehicles has become an inevitable choice for my country's energy strategy. The current focus is to promote the industrialization of pure electric vehicles and plug-in hybrid vehicles, popularize non-plug-in hybrid vehicles and energy-saving internal combustion engine vehicles, and upgrade my country's automobile industry. overall technical level.

[0003] At present, there are mainly the following schemes for the speed change of electric vehicles. The first option is to use a fixed reduction ratio; the second option is to use a two-speed transmission; the third option is to use the transmission of a traditional fuel vehicle for speed change. Because the motor itself has the characteristics of high ef...

Claims

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