BRAKE CONTROL APPARATUS

Information

  • Patent Application
  • 20070194622
  • Publication Number
    20070194622
  • Date Filed
    February 16, 2007
    17 years ago
  • Date Published
    August 23, 2007
    17 years ago
Abstract
A brake control apparatus includes a master cylinder, wheel cylinders provided for each vehicle wheel, first and second hydraulic actuators provided separately from the master cylinder and adjusting a hydraulic pressure of the wheel cylinder. The first and second hydraulic actuators respectively have first and second hydraulic pressure sources and each have a wheel cylinder system. The first hydraulic actuator adjusts the hydraulic pressure of the wheel cylinder belonging to the one wheel cylinder system between the wheel cylinders by the first hydraulic pressure source. The second hydraulic actuator adjusts the hydraulic pressure of the wheel cylinder belonging to the other wheel cylinder system than the above wheel cylinder system by the second hydraulic pressure source.
Description

BRIEF DESCRIPTION OF THE DRAWINGS


FIG. 1 is a system block diagram of a brake control apparatus of the present invention.



FIG. 2 is a drawing of a hydraulic circuit of a first hydraulic pressure unit.



FIG. 3 is a drawing of a hydraulic circuit of a second hydraulic pressure unit.



FIG. 4 is a flow chart showing a process of a brake-by-wire control.



FIG. 5 is a flow chart showing a process of an open/close control of a stroke simulator selection valve.



FIG. 6 is an example in which an integrated controller is combined with a system of the brake control apparatus of the present invention.



FIG. 7 is an example in which an IN valve IN/V is set to normally open and a backflow toward a pump is prevented by a check valve.


Claims
  • 1. A brake control apparatus comprising: a master cylinder;wheel cylinders provided for each vehicle wheel;first and second hydraulic actuators provided separately from the master cylinder and adjusting a hydraulic pressure of the wheel cylinder, the first and second hydraulic actuators respectively having first and second hydraulic pressure sources and each having a wheel cylinder system; andthe first hydraulic actuator adjusting the hydraulic pressure of the wheel cylinder belonging to the one wheel cylinder system between the wheel cylinders by the first hydraulic pressure source, andthe second hydraulic actuator adjusting the hydraulic pressure of the wheel cylinder belonging to the other wheel cylinder system than the above wheel cylinder system by the second hydraulic pressure source.
  • 2. The brake control apparatus as claimed in claim 1, wherein: the first and second hydraulic pressure sources are respectively a first and a second pumps, andthe wheel cylinder is directly pressurized by the first and second pumps.
  • 3. The brake control apparatus as claimed in claim 2, wherein: the wheel cylinder system is an x-pipe system.
  • 4. The brake control apparatus as claimed in claim 2, wherein: the wheel cylinder system is a front and rear split pipe system.
  • 5. The brake control apparatus as claimed in claim 2, wherein: the first and second hydraulic actuators are configured separately from each other as different units.
  • 6. The brake control apparatus as claimed in claim 2, wherein: the first and second hydraulic actuators are integrally formed with each other as an integrated unit.
  • 7. The brake control apparatus as claimed in claim 5, further comprising: first and second power supplies mounted in a vehicle, wherein: the first and second power supplies respectively supply the first and second hydraulic actuators with power.
  • 8. The brake control apparatus as claimed in claim 6, further comprising: first and second power supplies mounted in a vehicle, wherein: the first and second power supplies respectively supply the first and second hydraulic actuators with power.
  • 9. The brake control apparatus as claimed in claim 2, wherein: normally-open valves are provided between discharge sides of the first and second pumps and the each wheel cylinder, andone-way valves for allowing only a flow toward the normally-open valve are provided between the discharge 8 sides of the first and second pumps and the each normally-open valve.
  • 10. A brake control apparatus comprising: first and second pumps as hydraulic pressure sources, provided separately from a master cylinder; anda hydraulic actuator adjusting a hydraulic pressure of each wheel cylinder by the pump according to a depression amount of a brake pedal, andthe hydraulic actuator being formed of a first hydraulic actuator having the first pump and one wheel cylinder system, and a second hydraulic actuator having the second pump and the other wheel cylinder system than the above wheel cylinder system.
  • 11. The brake control apparatus as claimed in claim 10, wherein: the wheel cylinder system is an x-pipe system.
  • 12. The brake control apparatus as claimed in claim 11, wherein: the first and second hydraulic actuators are configured separately from each other as different units.
  • 13. The brake control apparatus as claimed in claim 11, wherein: the first and second hydraulic actuators are integrally formed with each other as an integrated unit.
  • 14. The brake control apparatus as claimed in claim 13, further comprising: first and second power supplies mounted in a vehicle, wherein: the first and second power supplies respectively supply the first and second hydraulic actuators with power.
  • 15. The brake control apparatus as claimed in claim 10, wherein: normally-open valves are provided between discharge sides of the first and second pumps and the each wheel cylinder, andone-way valves for allowing only a flow toward the normally-open valve are provided between the discharge sides of the first and second pumps and the each normally-open valve.
  • 16. The brake control apparatus as claimed in claim 10, wherein: the first and second hydraulic actuators are configured separately from each other as different units.
  • 17. A brake control apparatus comprising: wheel cylinders provided for each vehicle wheel;hydraulic pressure adjustment means for adjusting a hydraulic pressure of the wheel cylinder according to a depression amount of a brake pedal by a driver, the hydraulic pressure adjustment means being formed of (a) a first hydraulic pressure actuating means having a first pumping means and one wheel cylinder system; and(b) a second hydraulic pressure actuating means having a second pumping means and the other wheel cylinder system, andthe first hydraulic pressure actuating means adjusting the hydraulic pressure of the wheel cylinder belonging to the one wheel cylinder system between the wheel cylinders by the first pumping means, andthe second hydraulic pressure actuating means adjusting the hydraulic pressure of the wheel cylinder belonging to the other wheel cylinder system by the second pumping means.
Priority Claims (1)
Number Date Country Kind
2006-040209 Feb 2006 JP national