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:
Jan. 05, 1999
Filed:
Dec. 18, 1995
Hideharu Sugiyama, Fuji, JP;
Jatco Corporation, Fuji, JP;
Abstract
An automatic transmission control system is capable of quickly and accurately judging the normal state and faulty state of an input shaft rotation speed sensor and/or an output shaft rotation speed sensor. The system includes an input shaft rotation speed sensor condition judging device for judging whether an input shaft rotation speed sensor detecting a rotation speed NI of an input shaft of the automatic transmission is in a normal or faulty state, an output shaft rotation speed sensor condition judging device for judging whether an output shaft rotation speed sensor detecting a rotation speed No of an output shaft of the automatic transmission is in a normal or faulty state, a multiplying means for multiplying the rotation speed No of the output shaft with a current transmission gear ratio, and comparing and judging means for judging whether the multiplied value is coincident with the rotation speed NI of the input shaft. On the basis of those judgements, the output shaft rotation speed sensor is judged whether it is in the normal state or not by the output shaft rotation speed sensor condition judging device.