Patent ID: 6145939
Filing Date: 2000-11-14
Classification: B60T,Y10S

Abstract:
A control method for an electro-hydraulic braking system having an electrically operated boost unit selectively activated to supply hydraulic pressure to a service brake of a vehicle in relation to a detected driver braking force, the method comprising the steps of:measuring the hydraulic pressure supplied to the service brake;monitoring the measured pressure by detecting a pressure oscillation characteristic of cold temperature operation of said braking system;operating the braking system under a first control strategy when the characteristic pressure oscillation is indicative of the hydraulic fluid having a temperature above a pre-defined amount; andresponding to the detection of said characteristic pressure oscillation when the detected characteristic pressure oscillation is indicative of the hydraulic fluid having a temperature below said pre-defined amount by switching to a second control strategy that provides desired cold temperature operation of said braking system.