Switchable fast-fill hydraulic circuit for use in vehicle brakin

Details Switchable fast-fill hydraulic circuit for use in vehicle brakin Switchable fast-fill hydraulic circuit for use in vehicle brakin

1995-08-18

1998-04-21

Young, Lee W.

Fluid-pressure and analogous brake systems

With pump

3031154, 3031161, 3031132, B60T 1316

Patent

active

057410500

ABSTRACT:
An antilock/traction control/vehicle stability braking system hydraulic circuit using a fluid flow intensifier to provide a rapid application of fluid pressure to brakes during a TC/vehicle stability control operation at a flow rate that is greater than is normally available from an ABS pump alone. The intensifier increases the fluid flow as a function of using a stepped piston operating within respective input and output chambers having different effective diameters. The intensifier also includes an intermediate chamber into which fluid dumped from a brake cylinder is drawn rather than being lost to a master cylinder reservoir. The fluid thus remains in the hydraulic circuit, ensuring that a desired ratio of pedal travel versus pressure is maintained after a transition from TC/vehicle stability braking to ABS-base braking.

REFERENCES:
patent: 4957330 (1990-09-01), Morikawa et al.
patent: 5215359 (1993-06-01), Burgdorf et al.
patent: 5330258 (1994-07-01), Hoshoya et al.
patent: 5472266 (1995-12-01), Volz et al.

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