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:
Aug. 29, 2000
Filed:
Mar. 04, 1999
Atsushi Fujikawa, Saitama, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A transmission is constituted by drive and driven side movable pulleys (11 and 16), a metallic V belt (15) and drive and driven side cylinder chambers (14 and 19) for controlling the width of both pulleys. A hydraulic control system for the transmission, according to the present invention, is characterized as follow. The line pressure (PL) is set using first and second regulator valves (31, 32). First control oil pressure (PC1) supplied to the drive side cylinder chamber is controlled using a first linear solenoid valve (41) and a first pulley control valve (43). Second control oil pressure (PC2) supplied to the driven side cylinder chamber is set using a second linear solenoid valve (45) and a second pulley control valve (47). In addition, first and second regulator valves (31, 32) regulates the line pressure using control back pressure which is the higher of first and second control back pressure respectively set by the first and second linear solenoid valves (41, 45).