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:
Sep. 01, 1998
Filed:
Oct. 04, 1996
Akimasa Mori, Fuji, JP;
Jatco Corporation, Fuji, JP;
Abstract
An automatic power transmission assembled with a torque converter includes a lock-up mechanism for controlling the automatic power transmission with detecting a state of progress of a shifting operation in the automatic power transmission. A driving torque of an engine is temporarily lowered at a timing in the vicinity of completion of the shifting operation. The timing is determined by calculating data indicative of the state of progress of the shifting operation of the automatic power transmission on the basis of the result of a ratio value, which is determined by multiplying a transmission gear ratio (Gn) at a transmission speed range of the automatic power transmission after shifting with a rotation speed (Np) of an output shaft of the automatic power transmission and dividing the result by a revolution speed (Ne) of an engine connected to the torque converter detecting a state of the lock-up mechanism between a lock-up state and a non-lock-up state, modifying shifting timing indicative reference data depending upon the state of the lock-up mechanism and detecting the timing when the calculated data reaches the reference data.