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:
Oct. 15, 1991
Filed:
Apr. 25, 1990
Shyoji Tokushima, Tochigi, JP;
Makoto Watanabe, Tochigi, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An apparatus for controlling the distribution of drive power in an all-wheel-drive motor vehicle which has main drive wheels, auxiliary drive wheels, and a drive power transmitting system for transmitting the drive power to the auxiliary drive wheels. The apparatus has a hydraulic pressure source, a hydraulic system, a hydraulic clutch disposed in the drive power transmitting system, which varies the drive power transmitted to the auxiliary drive wheels, depending on the hydraulic pressure supplied from the hydraulic pressure source to the hydraulic clutch through the hydraulic system, and a control system for controlling the ratio at which the drive power is distributed between the main and auxiliary drive wheels, through regulation of the hydraulic pressure supplied from the hydraulic pressure source to the hydraulic clutch. The apparatus further includes a failure detecting system for detecting a failure of the hydraulic system, and a hydraulic pressure lowering system for lowering the hydraulic pressure supplied from the hydraulic pressure source to the hydraulic clutch when a failure of the hydraulic system is detected by the failure detecting system.