Patent ID: 7959238
Filing Date: 2011-06-14
Classification: B60T,F04B,H02K

Abstract:
1. An anti-lock braking system comprises a motor pump assembly comprising a motor and a pump, wheel sensors for detecting rotation of the wheels and generating a rotation signal, and an electrical control unit for controlling the motor pump assembly based on the rotation signal; wherein the motor comprises a stator and a rotor, the stator comprising six poles formed by permanent magnets; the rotor comprising a rotor shaft, a rotor core fixed to the rotor shaft and having nine teeth, a commutator fixed to the rotor shaft adjacent to the rotor core, and windings wound about the teeth and electrically connected to segments of the commutator; and wherein a bearing is fixed onto one end of the rotor shaft, the pump comprising at least one piston attached to the bearing, a mechanical centerline of the bearing being offset from the rotational axis of the rotor shaft so that the piston is driven by the bearing when the rotor shaft rotates.