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. 11, 2001
Filed:
Mar. 16, 2000
Akira Matsue, Komatsu, JP;
Makoto Toyama, Tatsunokuchi-machi, JP;
Komatsu, Ltd., Tokyo, JP;
Abstract
A method of controlling a clutch pressure of a transmission which can be applied to a clutch of a large capacity piston volume, which has a short time lag for engaging the clutch, a uniform clutch engaging time and is inexpensive, and a control apparatus therefor. Accordingly, in a clutch pressure control apparatus of a transmission including a pressure control valve which supplies a discharge oil in a hydraulic pump to a clutch chamber at a time of engaging a clutch, whereby the clutch chamber is full of the discharge oil, gradually increases a hydraulic pressure in the clutch chamber after being filled so as to engage the clutch, and drains the oil in the clutch chamber to a tank at a time of disengaging the clutch, the apparatus is provided with a supply bypass valve which directly supplies the discharge oil of the hydraulic pump to the clutch chamber with bypassing the pressure control valve at a time of engaging the clutch, and a discharge bypass valve which directly drains the oil in the clutch chamber to the tank by bypassing the pressure control valve at a time of disengaging the clutch.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile