Patent ID: 6357835
Filing Date: 2002-03-19
Classification: B60T

Abstract:
A vehicle braking device having a closed hydraulic circuit filled with a hydraulic fluid selectively subjected to various pressures at various points in the circuit, said hydraulic circuit comprising:a low-pressure reservoir; a first pressure receiver associated with one rear wheel of the vehicle and a first inlet which defines a first point in said circuit; a second pressure receiver associated with one front wheel of the vehicle and a second inlet which defines a second point in said circuit; a first pressure generator controlled mechanically and a first outlet which defines a third point in said circuit; a second pressure generator controlled electrically and a second outlet which defines a fourth point in said circuit; a hydraulic fluid accumulator; a pressure sensor capable of providing a measurement of a pressure of fluid at said third point in the circuit; and valve means characterized in that said second and fourth points in said circuit are connected to each other and permanently subjected to a same fluid pressure, said valve means including a first solenoid valve operated to move from an open state in which said second and third points in said circuit are connected to each other to a closed state in which said second and third points in said circuit are isolated from each other in response to said pressure measurement crossing a predetermined threshold, said circuit including means for electrically modulating said second pressure generator.