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. 05, 1992
Filed:
Apr. 23, 1990
Applicant:
Inventor:
Shuji Torii, Yokohama, JP;
Assignee:
Nissan Motor Co., Ltd., Yokohama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60K / ;
U.S. Cl.
CPC ...
180248 ; 7466 / ; 475198 ; 475248 ;
Abstract
A four-wheel drive system comprises a first drive train that is mechanically engageable for transmitting a driving force from an engine to a set of front wheels and a second drive train that is provided with a viscous coupling for transmitting a driving force from the engine to a set of rear wheels by way of the viscous coupling. The second drive train is constructed so as to satisfy the relation that the speed of rotation of an input shaft of the viscous coupling divided by the speed of rotation of the front wheels is larger than the result of the speed of rotation of an output shaft of the viscous coupling divided by the speed of rotation of the rear wheels.