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Hydraulic vehicle brake system

  • US 6,199,961 B1
  • Filed: 11/19/1999
  • Issued: 03/13/2001
  • Est. Priority Date: 03/01/1997
  • Status: Expired due to Term
First Claim
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1. Hydraulic vehicle brake system, comprising:

  • a brake pressure generator operable by a driver of the vehicle, at least one brake circuit connected to the brake pressure generator with wheel brakes and pressure modulation valves by means of which the pressure in the wheel brakes can be modulated according to predetermined control algorithms, a pump which delivers pressure fluid into the brake circuit in order to balance out the pressure fluid removed from the brake circuits for the modulation of the wheel brake pressure, a separating valve located between the brake pressure generator and a connected brake circuit, a precharging pressure generator having its pressure-side outlet connected to a suction side of the pump by way of an intermediary change-over valve in order to deliver pressure fluid to the suction side of the pump during a filling and a control phase for achieving an independent force braking operation, and a control device for evaluating sensor signals and for providing switching signals for the pump and valves, wherein the change-over valve has a closed position, an open position, and a throttled position, and wherein the control device is configured such that in an independent force braking operation the change-over valve adopts its throttled position in the control phase, and wherein the control device includes at least one control algorithm which causes the change-over valve in the filling phase to adopt its open position.

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