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. 08, 1992
Filed:
Jun. 13, 1991
Applicant:
Inventors:
Tomoo Sawasaki, Higashihiroshima, JP;
Chitoshi Morishige, Hiroshima, JP;
Assignee:
Mazda Motor Corporation, Hiroshima, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60K / ;
U.S. Cl.
CPC ...
74866 ; 74867 ; 74864 ; 192 76 ;
Abstract
A hydraulic control apparatus for a transmission performs hydraulic control for the pressure controlling valves by conducting a feedback pressure control on one pressure controlling valve provided in the transmission on the basis of the output of a hydraulic sensor and by performing feedforward control on the other pressure controlling valve in the transmission utilizing the results of the feedback control.