Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1995-05-04
1996-03-05
Ballato, Josie
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
3031134, B60T 826, B60T 860
Patent
active
054960991
ABSTRACT:
A hydraulic dual-circuit brake system for a road vehicle, with front-axle/rear-axle brake-circuit division, is equipped with an anti-lock system working on the recirculation principle, a device for driving-dynamics control and a device for the automatic initiation of full braking when the driver actuates the brake pedal at a speed .phi. which is higher than a relevant threshold value .phi..sub.s. A pedal-position sensor and a pressure sensor which generates electrical output signals characteristic of the brake pressure fed into the front-axle brake circuit provide control of the brake-pressure control unit into the brake-pressure supply mode both by the pedal-controlled pressure loading of a drive-pressure space of its brake booster and by the valve-controlled pressure loading of the drive-pressure space of the brake booster. The valve-controlled pressure loading is capable of being initiated automatically by output signals from an electronic control unit. For a supplementary or sole supply of brake pressure to the front-axle brake circuit, an auxiliary cylinder can, by valve control, be loaded with and relieved again of the outlet pressure of an auxiliary-pressure source and is a pressure intensifier. Thereby, brake fluid can be displaced into the front-axle brake circuit both during normal braking and during automatically controlled braking. The brake-fluid quantity can be controlled in a predeterminable monotonic correlation from a comparative processing of the output signals of the pedal-position sensor with the output signals of the pressure sensor.
Ballato Josie
Mercedes-Benz AG
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