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:
May. 28, 1996
Filed:
Jun. 06, 1995
Larry T Brown, Dearborn, MI (US);
Marvin P Kraska, Dearborn, MI (US);
Ford Motor Company, Dearborn, MI (US);
Abstract
A system for controlling engagement of forward drive and reverse drive when a gear selector lever is moved from park or neutral position and for adapting the control on the basis of the slip across the oncoming friction element includes an automatic transmission, gearing friction elements that control the gearing, a valve body containing shift valve solenoids for operating the shift valves and control algorithms executed by a microprocessor, a gear selector lever, a throttle position sensor, shaft speed sensors, and transmission input and output shafts. The clutch pressure increases linearly under the control of a closed-loop system. A control algorithm senses when the closed-loop control is operative and automatically changes the period during which clutch pressure is maintained at a high magnitude prior to engagement so that the resulting gear change is smooth and occurs at maximum speed.