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:
Dec. 18, 2000
Filed:
Oct. 28, 1998
Shinsuke Sakane, Aichi-ken, JP;
Katsuo Ohbai, Anjo, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
An anti-skid control system includes a hydraulic pressure generator for generating hydraulic brake pressure, hydraulic pressure control valves which control the brake hydraulic pressure of the wheel cylinders, wheel speed sensors for detecting the rotational speed of the wheels, and a controller for controlling the hydraulic pressure control valves to decompress or pulse-boost the brake hydraulic pressure in the wheel cylinders based on the output signal of the wheel speed sensors. A brake pedal depression amount detecting device detects the amount of depression of the brake pedal. The controller includes a road surface change judging device for judging that the road surface has shifted from a surface having a low coefficient of friction to a surface having a high coefficient of friction when a continuous run pulse number or a continuous run time of the pulse boost control exceeds a preset value. A duty ratio changing device changes the duty ratio of the pulse boost control to increase the rate of boost time when the road surface change judging device has judged a shift from a road surface having a low coefficient of friction to a road surface having a high coefficient of friction. A pulse boost executing device controls the hydraulic pressure control valve to pulse-boost the brake hydraulic pressure of the wheel cylinders based on the duty ratio changed by the duty ratio changing device, and a preset value changing device changes the preset value based on the output signal of the depression amount detecting device.