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.:

US 6932180 B1

PDF
Full Text
Expired
Date of Patent:
Aug. 23, 2005

Filed:

Oct. 23, 2003
Applicants:

Koji Matsuno, Tokyo, JP;

Hideharu Tatsumi, Tokyo, JP;

Atsushi Fukuda, Tokyo, JP;

Inventors:

Koji Matsuno, Tokyo, JP;

Hideharu Tatsumi, Tokyo, JP;

Atsushi Fukuda, Tokyo, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H059/60 ;
U.S. Cl.
CPC ...
Abstract

A mode establishing section of a differential limiting control apparatus for a four wheel drive vehicle commands an automatic mode control section or a manual mode control section to output calculated clutch torques according to a signal from a mode switch operated by a driver. In an initial condition of an ignition switch turned on, the execution command is issued to the automatic mode control section, until the driver newly selects the manual mode through the mode switch. Further, when the vehicle travels at a speed higher than a preestablished threshold value, the execution command is outputted to the automatic mode control section, irrespective of the signal from the mode switch.


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