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:
Apr. 04, 2000
Filed:
Nov. 12, 1997
Yasuo Naito, Tokyo, JP;
Hiroyuki Tsuji, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An antiskid brake controller, which can secure a sufficient braking capability, avoid a locked state and maintain high reliability regardless of a road surface state without using a road sensor, includes a detector for detecting respective wheel speeds, a braking force adjustment unit which responds to the application of a brake and an electronic control unit (ECU) for calculating a control amount to the braking force adjustment unit to prevent the locking tendencies of respective wheels. The ECU includes a wheel deceleration calculator for calculating the wheel decelerations corresponding to the locking tendencies, a grouping unit for grouping the respective wheel speeds to a plurality of groups, a calculator for calculating a basic wheel speed based on the respective wheel speeds of the groups, a unit for presuming road surface friction factors based on the change in time of the basic vehicle speed, a threshold setting unit for variably setting the threshold values of the wheel decelerations in accordance with road surface friction factors and a calculation unit for calculating control amounts based on the result of comparison of the wheel decelerations with the threshold values.