Patent ID: 6238016
Filing Date: 2001-05-29
Classification: B60T

Abstract:
A device for controlling an electro-hydraulic brake system of a vehicle having wheels, a battery and the electro-hydraulic brake system adapted to be energized by the battery and including wheel cylinders, a brake pedal, electric control means, a pump adapted to operate under a control of the electric control means for pressurizing a brake fluid, and on-off valves adapted to operate under a control of the electric control means for selectively supplying the brake fluid pressurized by the pump to each of the wheel cylinders, the device comprising:means for detecting if vehicle speed is substantially zero;means for detecting if the brake pedal is not substantially depressed; andmeans for detecting output voltage of the battery;wherein the electric control means control the pump and at least one of the on-off valves such that, when the vehicle speed detection means detect a substantially zero vehicle speed, while the brake pedal depression detection means detect substantially no depression of the brake pedal, the pump is operated with the at least one on-off valve being opened to supply the brake fluid pressurized by the pump to a corresponding one of the wheel cylinders for a predetermined time period, with the battery output voltage detection means detecting the output voltage of the battery in the meanwhile,whereby the device judges the battery to be in a normal operating condition when the battery output voltage detected by the battery output voltage detection means in the meanwhile is not lower than a predetermined value.