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. 24, 2012
Filed:
Jun. 26, 2008
Simon Chin-yu Tung, Rochester Hills, MI (US);
Gregory Mordukhovich, Bloomfield Hills, MI (US);
Simon Chin-Yu Tung, Rochester Hills, MI (US);
Gregory Mordukhovich, Bloomfield Hills, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A multi-layer coating for a smooth contact surface of a clutch plate and a method for manufacturing the same have been developed. This coating can help reduce the prevalence of clutch shudder, noise, and plate wear that is often encountered in a friction-disc clutch mechanism found in a motor vehicle's powertrain. The multi-layer coating may comprise a relatively soft base layer and one or more relatively hard particle layers overlying the base layer. This combination of layers can help provide stable friction characteristics and thermal properties between clutch plate surfaces. One or more optional bonding layers may also be provided between any two adjacent layers to improve the adherent bonding therebetween. At least some of the layers of the multi-layer coating may be applied by a HVO/AF thermal spray procedure.