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. 26, 1987
Filed:
Apr. 23, 1986
Applicant:
Inventors:
Shinji Shimaoka, Hiroshima, JP;
Koichi Yamamoto, Hiroshima, JP;
Assignee:
Mazda Motor Corporation, , JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60K / ;
U.S. Cl.
CPC ...
74866 ; 3644241 ;
Abstract
In a gear-shifting control system for an automatic transmission, gear-shifting is normally controlled according to main gear-shifting characteristics in which gear-shifting points are determined using the turbine rpm as a parameter. On the other hand, gear-shifting is effected according to backup gear-shifting characteristics which are determined using the vehicle speed as a parameter in case of failure of the part for detecting the turbine rpm.