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. 16, 1988
Filed:
Oct. 03, 1986
Takashi Shibayama, Isehara, JP;
Kazuhiko Sugano, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A hydraulic control system comprises a control valve with a solenoid valve operatively connected thereto to modulate the characteristic of hydraulic fluid pressure supplied to a friction element that is to be engaged during a shift in speed ratio. The current supplied to the solenoid is varied in ON/OFF manner in accordance with a duty factor computed by a control unit. The control unit includes a memory storing a map containing various duty factors corresponding to various kinds of shifts and determines an adequate duty factor for a shift which is to take place in the transmission. The characteristic of the hydraulic fluid pressure is modulated during a time period variable with vehicle speed and engine torque which are measured by sensors associated with the control unit.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile