Function

(1)Change the transmission ratio and expand the driving wheel torque and rotation speed variation range to be accustomed to the power requirement and driving condition of vehicle under different circumstances and meanwhile,make the engine work under favorable condition;

(2)Under the condition of keeping the engine crankshaft rotation direction unchanged,it can realize the automobile reversing driving;(https://www.daowen.com)

(3)Cut the engine power transmission to meet the requirements of the automobile’s pause and sliding etc.,and facilitate the transmission’s gear shifting or power output.