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:
Jan. 28, 1986
Filed:
Apr. 16, 1984
Applicant:
Inventor:
Kunihiko Suzuki, Sagamihara, JP;
Assignee:
Nissan Motor Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60K / ;
U.S. Cl.
CPC ...
180249 ; 180247 ;
Abstract
A four-wheel drive system has a center differential between front and rear wheels, and means of restraining or locking the center differential. The four-wheel drive system is equipped with a control system for automatically unlocking the center differential when the steering angle becomes equal to or larger than a predetermined angle. The control system may further have a vehicle speed sensor. In this case, the control system unlocks the center differential only when the vehicle speed is equal to or lower than a predetermined speed.