Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1997-04-22
2000-09-19
Oberleitner, Robert J.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
B60T 840
Patent
active
061201138
ABSTRACT:
The present invention is directed to a hydraulic braking system for an automotive vehicle, wherein a first passage is provided for communicating a master cylinder with first and second wheel cylinders. First and second pressure control devices are disposed in the first passage to control the hydraulic pressure of the brake fluid in the first and second wheel cylinders, respectively. A second passage is provided for communicating the master cylinder with an inlet of an auxiliary pressure source, which introduces the brake fluid from the wheel cylinders, and discharges the pressurized brake fluid to the wheel cylinders through the pressure control devices. A valve device is disposed in the first passage and connected to the second passage to selectively place one of a first operating position for communicating the master cylinder with the pressure control devices and blocking the communication between the master cylinder and the inlet of the auxiliary pressure source, and a second operating position for communicating the master cylinder with the inlet of the auxiliary pressure source and blocking the communication between the master cylinder and the pressure control devices. At least an auxiliary passage is provided for communicating the master cylinder with at least one of the wheel cylinders. And, at least a switching valve is disposed in the auxiliary passage to open and close the auxiliary passage.
REFERENCES:
patent: 4878715 (1989-11-01), Toda
patent: 4898431 (1990-02-01), Karnopp et al.
patent: 5236256 (1993-08-01), Schmidt et al.
patent: 5560690 (1996-10-01), Hattori et al.
patent: 5711585 (1998-01-01), Tozu et al.
Fukami Masanobu
Itoh Takayuki
Kojima Seiichi
Tozu Kenji
Yamazaki Norio
Aisin Seiki Kabushiki Kaisha
Oberleitner Robert J.
Siconolfi Robert A.
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