Patent ID: 8177682

Claim:
An apparatus for improving fuel efficiency of a vehicle, comprising: an engine, having a crank shaft, the crank shaft connected to a core axis in a moveable manner, the core axis having a first active transmission wheel and a second active transmission wheel in a moveable manner, the engine having an engine rotation speed detection system; a first clutch, located moveably on the core axis between the first active transmission wheel and the engine crank shaft; a second clutch, located moveably on the core axis between the first active transmission wheel and the second active transmission wheel; a generator system, connected to a first passive transmission wheel, the first passive transmission wheel connected to the first active transmission wheel through a first transmission element; an air-conditioning system, connected to a second passive transmission wheel, the second passive transmission wheel connected to the second active transmission wheel through a second transmission element; a control circuit, electrically connected to the first clutch, the second clutch, the generator system, the engine rotation speed detection system of the engine; and a battery, electrically connected to the control circuit; wherein when the control circuit receives a signal, the control circuit is able to control the first clutch and the second clutch to operate at the same or different time so as to make the engine crank shaft and the first active transmission wheel engaging with or disengaging from each other, and/or make the first active transmission wheel and the second active transmission wheel engaging with or disengaging from each other, the control circuit also determining according to the signal whether to provide power directly to operate the generator system to drive the air-conditioning system.