Patent ID: 8403808

Claim:
An individually-powered dual CVT differential system with a stabilizing device, comprising: a first individual motor (M 100 ) and a second individual motor (M 200 ); a first continuously variable transmission (CVT 100 ) and a second continuously variable transmission (CVT 200 ) arranged to automatically change a respective speed ratio according to a load state on a respective first wheel group (W 100 ) and second wheel group (W 200 ), each said continuously variable transmission (CVT 100 , CVT 200 ) having a first end connected to receive power from a respective one of the first and second individual motors (M 100 , M 200 ); a stabilizing device (SDT 100 ) made up of a dual-end shaft coupling device connected between a second end of the first continuously variable transmission (CVT 100 ) and a second end of the second continuously variable transmission (CVT 200 ), said stabilizing device setting a coupling torque and providing a sliding damping effect caused by fluid viscosity, fluid damping, mechanical friction, electromagnet eddy current damping, or power generation anti-torque effect, when the set coupling torque is exceeded to stabilize the differential system in case of unstable operation caused by varied loads at individual load sides during driving operation; and an electronic control unit (ECU 100 , ECU 200 , ECU 300 , or ECU 400 ) connected to a user interface (MI 100 , MI 200 , MI 300 , or MI 400 ) and/or central control unit (CCU 100 , CCU 200 , CCU 300 , or CCU 400 ) for controlling at least one of a rotational speed, torque, rotary direction, and current of each of the first and second individual motors (M 100 , M 200 ), wherein a speed differential operation between first and second wheel groups (W 100 , W 200 ) is carried out by said first and second continuously variable transmissions (CVT 100 , CVT 200 ) rather than by feedback control by the electronic control unit (ECU 100 ) of the rotational speed of the respective first and second individual motors (M 100 , M 200 ).