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Brake control system for a motor vehicle

  • US 7,527,339 B2
  • Filed: 09/06/2005
  • Issued: 05/05/2009
  • Est. Priority Date: 09/06/2004
  • Status: Expired due to Fees
First Claim
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1. A brake control apparatus for a motor vehicle comprising:

  • a master cylinder connected via a first hydraulic circuit to a plurality of wheel cylinders, and configured to generate a master cylinder pressure by a driver'"'"'s braking action;

    a plurality of pressure control valves disposed in the first hydraulic circuit for regulating a wheel cylinder pressure of each of the wheel cylinders;

    a pump having a pump inlet connected via a second hydraulic circuit to the master cylinder and connected via a return circuit to each of the wheel cylinders, and a pump outlet connected via the first hydraulic circuit to each of the wheel cylinders, and configured to generate a hydraulic pressure independently of a driver'"'"'s braking action;

    an outflow gate valve disposed in the first hydraulic circuit;

    an inflow gate valve disposed in the second hydraulic circuit; and

    a brake control unit configured to be electronically connected to the pressure control valves, the oufflow and inflow gate valves, and the pump, for regulating the wheel cylinder pressure of each of the wheel cylinders by controlling operations of the respective valves and the pump, whereinthe brake control unit is configured to execute a pre-charge and flow-back operating mode in which the pump is operated for a pre-charge time duration, before execution of brake control that the pump is operated as a pressure source, or during an initial stage of the brake control, in a specified state where the outflow gate valve, the inflow gate valve, and the pressure control valves are kept open concurrently.

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