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:
Sep. 07, 1993
Filed:
Jul. 17, 1992
Yoichi Miyawaki, Itami, JP;
Hideaki Fujioka, Itami, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
The antilock brake control apparatus has a locking symptom detector for detecting a wheel locking symptom and a removal of wheel locking symptom. A microcomputer is provided for producing a depressurization signal in response to the detection of the wheel locking symptom until the removal of the wheel locking symptom, and for calculating, after a locking symptom is detected, a pressure difference between the current wheel cylinder pressure and the wheel cylinder pressure when a locking symptom is first detected to obtain a maximum pressure difference at a time when the removal of the wheel locking symptom is detected. The microcomputer further produces a slow pressurization signal in response to the removal of the wheel locking symptom and during an asynchronous state, in which a difference between the wheel speed and the estimated vehicle speed is more than a predetermined range, and a rapid pressurization signal in response to the establishment of the synchronous state, in which the difference is within the predetermined range, and until the wheel cylinder pressure is increased to gain a predetermined percentage of the maximum pressure difference.