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:
Jan. 22, 1991
Filed:
Feb. 20, 1990
Takahiro Goshima, Gifu, JP;
Kazutoshi Yogo, Showa, JP;
Hideo Wakata, Midori, JP;
Masashi Kishimoto, Chiryu, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
An anti-locking control system for use in a motor vehicle having four wheels, comprising a hydraulic pressure supply system for applying a braking pressure from a master cylinder to two pairs of wheel-braking cylinders for braking the pair of wheels and a pump provided in common for the two pairs of cylinders in the hydraulic pressure supply system to decrease both the braking hydraulic pressures in each pair of wheel-braking cylinders. The hydraulic pressure supply system includes a pair of control valves each of which is arranged to have a first position at which the master cylinder is communicated with each of the pair of wheel-braking cylinders and a suction side of the pump is disconnected to the wheel-braking cylinder and a second position for disconnection to the wheel-braking cylinder and communication with the cylinder. Also provided in the control system an electronic control unit for effecting duty control of the pair of control valves so that the time periods at which the pair of control valves are at the second positions are not overlapped with each other. With this arrangement, although the pressure-decreasing is effected by one pump provided in common for the respective wheel-braking cylinders, it is possible to adequately effect the pressure-decreasing with respect to the lower-pressure side wheel-braking cylinder.