Hydraulic control method for continuously variable speed change gear mechanism for a vehicle and a drive control method for a pressure valve thereof
CA 1321304 C · Owner: Tatsumi, Takumi · Inventors: Tatsumi, Takumi; Yamamoto, Hiroaki; Hirano, Sadayuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a hydraulic control method for a continuously variable speed change gear mechanism and more, particularly, to such a method in which by switching a driving, frequency of a pressure control valve arrangement in order to change a hydraulic pressure in accord with an oil temperature of a hydraulic circuit, a proper oil pressure is assured even at low temperatures where oil viscosity is large, and a clutch pressure and the like are suitably maintained, thereby enabling operability to be improved and further relates to a pressure valve drive control method for such a mechanism in which, by switching a driving frequency of a pressure control valve arrangement in …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted August 17, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 17, 2010.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.