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:
Jul. 09, 2013
Filed:
Apr. 21, 2010
Eigo Sakagami, Kawasaki, JP;
Atsuhiro Mori, Fujisawa, JP;
Eigo Sakagami, Kawasaki, JP;
Atsuhiro Mori, Fujisawa, JP;
Nissan Motor Co., Ltd., Yokohama-shi, JP;
Abstract
[Problem] A two-wheel→four-wheel drive switching for a traction-transmitting part time four-wheel drive vehicle in which a gear clutch for separating one of auxiliary driving wheels from a drive train is equipped can be carried out under a shock reduction. [Means for solving problem] In a case where a two-wheel→four-wheel drive switching request occurs during a traveling of the vehicle (step Sand step S), an operation of switching a traction-transmitting transfer from a non-transmitting state to a transmitting state is preceded (step Sand step S) and, thereafter, the gear clutch is engaged (step Sand step S) when a revolution speed difference ΔVw between main and auxiliary driving wheels is 0<ΔVw<α along with an advance of the state switching of the transfer so that large shock and abnormal sound are not generated even if the gear clutch is switched from a released state to an engagement state.