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. 19, 1987
Filed:
Sep. 04, 1985
Applicant:
Inventors:
Toshiyuki Kikuchi, Higashi-Hiroshima, JP;
Koichi Yamamoto, Hiroshima, JP;
Assignee:
Mazda Motor Corporation, Hiroshima, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60K / ;
U.S. Cl.
CPC ...
74866 ; 74867 ;
Abstract
A vehicle automatic transmission having a torque converter and a multiple-stage gear mechanism. When the vehicle is stopped and the shift lever is moved from the N-range to the D-range, the gear mechanism is at first shifted up to the highest gear stage and, when the converter turbine speed is decreased to a very low value, for example 200 rpm, the gear mechanism is shifted down to the first stage. If the vehicle brake is engaged and the engine is idling, the highest gear stage is maintained even after the converter turbine speed is decreased below the aforementioned value.