The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 22, 1994
Filed:
May. 11, 1992
Hiroyuki Watanabe, Atsugi, JP;
Yuji Oishi, Atsugi, JP;
Ishiro Kaneda, Atsugi, JP;
Masahiko Hara, Atsugi, JP;
Katsunori Shirai, Atsugi, JP;
Koji Morita, Hiratsuka, JP;
Atsugi Unisai Corporation, both of, JP;
Nissan Motor Co., Ltd., both of, JP;
Abstract
A pressure control device for a hydraulic braking system of an automotive vehicle is provided with a master cylinder for pressurizing hydraulic fluid according to a braking action of a driver. A wheel cylinder for applying braking force to a wheel is communicated with the master cylinder through a main passage. An accumulator is connected to the main passage. A rotating condition of the wheel is detected by a detector and is outputted as a signal indicative of the rotating condition of the wheel. A hydraulic pressure controller is arranged to control the wheel cylinder hydraulic pressure when the detector detects one of a lock condition and a slippage condition. The hydraulic pressure controller is communicated with the main passage. A switching device is arranged to stop the communication between the master cylinder and the hydraulic pressure controller, and open the communication between the accumulator and the hydraulic pressure controller when the detector detects the slippage condition in acceleration. Therefore, during the slippage control in acceleration, the hydraulic fluid stored in the hydraulic pressure controller is returned to the main passage owing to the pressure difference therebetween.