Patent Number: 6,945,612

Title: System for estimating brake-fluid pressure

Abstract: A brake control system includes a brake line with a supply line, a pump for supplying brake fluid to the supply line, branch lines branched from the supply line to wheel cylinders, a pressure controller for allowing independent control of brake-fluid pressures within the wheel cylinders, and an ECU for controlling the pump and the pressure controller. The ECU includes an estimate part for estimating the pressures within the wheel cylinders in accordance with a flow amount of brake fluid obtained out of signals indicative of braking conditions, wherein it is estimated an amount of brake fluid flowing from the supply line to the wheel cylinder during execution of brake-fluid pressure control of the ECU and when the control is switched to pressure-increase control for the wheel cylinder having the pressure lower than that in the supply line, and wherein it is estimated the pressure within the wheel cylinder in accordance with the amount of brake fluid as estimated.

Inventors: Imamura; Masamichi (Kanagawa, JP), Higuma; Motohiro (Kanagawa, JP)

Assignee: Hitachi, Ltd.

International Classification: B60T 8/40 (20060101); B60T 13/66 (20060101); B60T 17/22 (20060101); B60T 17/18 (20060101); B60T 008/00 ()

Expiration Date: 09/20/2022