Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1998-06-30
2000-05-16
Oberleitner, Robert
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
3031154, 3031161, 60552, B60T 834
Patent
active
060626550
ABSTRACT:
The present invention is directed to a hydraulic brake apparatus for applying braking force to each wheel of a vehicle in response to depression of a brake pedal. A master piston is received in a cylinder body to define a pressure chamber ahead of the master piston and a power chamber behind it. An auxiliary pressure source is provided for pressurizing the brake fluid in a reservoir to discharge power pressure. A control piston is slidably disposed in the cylinder body ahead of the master piston to be movable in response to movement thereof, so that a regulator chamber is defined ahead of the control piston, and a rear end thereof is exposed to the pressure chamber. A first passage is adapted to communicate the auxiliary pressure source with the power chamber, and a second passage is adapted to communicate the power chamber with the reservoir through the regulator chamber. A pressure increase valve device is disposed in the first passage to open or close the first passage in response to movement of the control piston. And, a pressure decrease valve device is disposed in the second passage to open or close the second passage in response to movement of the control piston. Preferably, a one way valve is disposed in the first passage, and a pressure restriction device may be disposed in the second passage.
REFERENCES:
patent: 3928970 (1975-12-01), Farr
patent: 5515678 (1996-05-01), Kurokawa et al.
patent: 5851057 (1998-12-01), Terazawa et al.
patent: 5924530 (1999-07-01), Nishii et al.
patent: 5927074 (1999-07-01), Nishii et al.
Hata Kyousuke
Nishii Michiharu
Oishi Masaki
Yamamoto Hideki
Aisin Seiki Kabushiki Kaisha
Oberleitner Robert
Sy Mariano
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