A four-speed automatic transmission with two dual-clutch dual-row planetary gears

Abstract

The invention discloses a four-speed automatic transmission with two double-clutch double-row planetary gears, which includes: an input shaft; a double clutch at the input end: including a first clutch and a second clutch; A front axle of the front planetary carrier; a box body; the first planetary row: including the first sun gear, the first front planetary carrier, the first rear planetary carrier, the first planetary shaft, the first planetary gear and the first ring gear; the second Planetary row: including the second ring gear, the second planetary gear, the second planetary gear shaft, the second planet carrier and the second sun gear; rear axle assembly: including the second sun gear rear shaft, the second planet carrier rear shaft; output end Double clutch: including the third clutch and the fourth clutch; the output shaft; the present invention places the clutch outside the box, reduces the oil churning loss of the gearbox, and makes the planetary gear transmission itself very efficient; through the multi-gear adjustment of the transmission, the There are more opportunities for the motor to work in the high-efficiency zone, which improves the economy of the vehicle and increases the driving range.

Description

Technical field: [0001] The invention relates to the technical field of vehicles, in particular to a four-speed automatic transmission with two dual-clutch dual-row planetary gears. Background technique: [0002] The low-speed torque of the motor of a pure electric vehicle is very large, and the efficiency of the motor is extremely low at this time. Therefore, the electric vehicle consumes a lot of electricity when starting, accelerating and climbing a steep slope at low speed, and it will also make the motor heat. In hilly areas, mountain cities or congested cities The cruising range of electric vehicles is shortened a lot. This requires the use of gearboxes to reduce the heating of the motor, reduce energy consumption, increase the cruising range, and improve vehicle dynamics. If there is no need to improve the power, the power of the motor can be reduced to further save energy and increase the cruising range, and the cooling system of the motor can be simplified to reduc...

AI Technical Summary

Problems solved by technology

The disadvantage is: the economy of electric vehicles is not high at low speed and high speed

[0004] At present, there are also some electric vehicles that use various two-speed transmissions. However, due to the low efficiency of the transmissions used and the limited improvement of the economy of the vehicle by the two-speed transmission, the economy of the vehicle is not high.

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