Patent ID: 7921952

Claim:
A parking assistance system for a vehicle comprising: a front auxiliary wheel assembly adapted to be mounted to a chassis of the vehicle and adjacent to two front wheels of the vehicle, with the front auxiliary wheel assembly including two front auxiliary wheels and a first auxiliary motor coupled to the two front auxiliary wheels, with at least one of the two front auxiliary wheels being drivable by the first auxiliary motor to rotate in a forward or backward direction; a rear auxiliary wheel assembly adapted to be mounted to the chassis of the vehicle and adjacent two rear wheels of the vehicle, with the rear auxiliary wheel assembly including two rear auxiliary wheels and a second auxiliary motor coupled to the two rear auxiliary wheels, with at least one of the two rear auxiliary wheels being drivable by the second auxiliary motor to rotate in the forward or backward direction; a plurality of lift devices mounted between the front and rear auxiliary wheels and the chassis, with the plurality of lift devices controlling upward and downward movement of the front and rear auxiliary wheels between a first position above the ground and a second position on the ground, with the front and rear wheels of the vehicle being above the ground when the front and rear auxiliary wheels are in the second position, and with the front and rear wheels of the vehicle being on the ground when the front and rear auxiliary wheels are in the first position; a first auxiliary motor driver coupled to the first auxiliary motor, a second auxiliary motor driver coupled to the second auxiliary motor; at least one parking assistance controller coupled to the first and second auxiliary motor drivers; and a control unit coupled to said at least one parking assistance controller, with the control unit being manually operable to control a rotating direction and speed of the first and second auxiliary motors via said at least one Parking assistance controller, controlling a moving distance and direction of the front and rear auxiliary wheels in the forward or backward direction; with said at least one parking assistance controller including first and second parking assistance controllers respectively coupled to the first and second auxiliary motor drivers, with the control unit including first and second sensor units adapted to be mounted on left and right sides of the vehicle, with each of the first and second sensor units including a first sensor coupled to the first auxiliary motor and a second sensor coupled to the second auxiliary motor.