US Patent 7316156 Limited slip differential performance simulation procedure

Patent 7316156 was granted and assigned to Afton Chemical on January, 2008 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

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Afton Chemical

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7316156

Date of Patent

January 8, 2008

Patent Application Number

11128528

Date Filed

May 13, 2005

Patent Primary Examiner

Hezron Williams

Patent abstract

A method of simulating a split μ axle test for limited slip differentials for automotive applications. The method includes treating a clutch pack for a limited slip differential in a lubricant composition for a first period of time at a predetermined temperature. The clutch pack is mounted in a friction testing rig. A predetermined amount of test fluid is provided to the testing rig. A drive for the testing rig is cycled on and off for a predetermined number of on and off cycles. When the drive is on, a predetermined relative rotational speed between friction plates and metal plates in the clutch pack is generated.