Patent ID: 6109879
Filing Date: 2000-08-29
Classification: B60T,F04B,Y10S

Abstract:
A fluid pressure source apparatus comprising:a fluid pump;an accumulator for receiving pressure from the fluid pump;a pressure switch for detecting a pressure in the accumulator;an electric motor for driving the fluid pump;motor control means for driving the electric motor when the pressure switch detects low pressure in the accumulator;current detection means for detecting a motor current value of the electric motor;abnormality determination means for determining, based on the motor current value of the electric motor determined by the current detection means, whether at least one of the accumulator and the electric motor are experiencing an abnormality; andfailure determination means for determining whether the motor current value of the electric motor occurring during a first set length of time following start of driving of the electric motor is greater than a first set value, and for determining the existence of an abnormality in the current detection means when the motor current value of the electric motor is not greater than the first set value, the abnormality determination means determining whether at least one of the accumulator and the electric motor is experiencing an abnormality based on the motor current value of the electric motor only when it is determined by said failure determination means that the current detection means is normal.