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:
Feb. 07, 1989
Filed:
Sep. 09, 1987
Kinji Ogino, Saitama, JP;
Akebono Brake Industry Co., Ltd., Tokyo, JP;
Akebono Research and Development Centre Ltd., Saitama, JP;
Abstract
A system for controlling a motor vehicle brake comprising a supply-and-exhaust valve group which supplies hydraulic pressure for a brake to wheel cylinders of brakes and exhausts hydraulic pressure in the wheel cylinders. A switch valve group which controls a supply to the decompression valve so that hydraulic pressure is supplied to the supply-and-exhaust valve group whether passing through the decompression valve or not. Slip dectecting device detects a slipping status of the driving wheels. Slipping threshold value setting device which determines a slipping threshold. Deceleration status detecting device detects a deceleration status of wheels when the vehicle decelerates. Deceleration status threshold value setting device determines a deceleration status threshold value. A control unit controls, in a slip-prevention control of the system, the switch valve group to supply hydraulic pressure to the supply-and-exhaust valve group through the decompression valve, and controls the supply-and-exhaust valve group according to the predetermined slipping threshold value to prevent the driving wheels from slipping. In a skid-prevention control, the control unit controls the switch valve group to supply hydraulic pressure not decompressed by the decompression valve to the supply-and-exhaust valve groups, and controls the supply-and-exhaust valve group according to the deceleration status threshold value in order to prevent the driving and driven wheels from skidding.