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:
Aug. 17, 2004
Filed:
Mar. 26, 2003
Franz Gratzer, Stallhofen, AT;
Steyr Powertrain AG & Co. KG, Lannach, AT;
Abstract
Drive system for an all-wheel driven motor vehicle having a first and a second driven axle ( ), which drive system has a differential-speed-dependent clutch ( ) for driving the second driven axle, and an at least partially lockable differential ( ) between the wheels of the second driven axle ( ). The differential-speed-dependent clutch ( ) comprises a pump ( ) which, when a differential speed occurs, produces a pressure which leads to the transmission of a torque to the second driven axle ( ). In order to ensure that the differential lock responds in a manner coordinated neatly in terms of time and taking account of the driving state, a connecting line ( ) leads from the delivery side ( or ) of the pump ( ) to an actuating member ( ) of the lockable differential ( ), with the result that, when a differential speed occurs, the pressure produced by the pump ( ) makes it possible to at least partially lock the differential ( ) by means of a positive locking clutch ( ).