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:
Mar. 10, 1992
Filed:
Dec. 26, 1989
Applicant:
Inventors:
Assignees:
JATCO Corporation, Shizuoka, JP;
Nissan Motor Company, Limited, Kanagawa, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60K / ;
U.S. Cl.
CPC ...
74869 ; 74866 ;
Abstract
A shift control system for an automatic power transmission, utilizes a logic for utilizing a shifting sequence for operating a plurality of shift solenoids for establishing valve operation in a plurality of shift valves in a predetermined order and for draining more than one speed servo pressure. The shifting sequence being a 4-2 downshift, whereby the shift solenoids are controlled such that the second speed gear ratio is shifted to via the first speed gear ratio.