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:
Jun. 27, 2006
Filed:
Jan. 13, 2005
Mark W. Verbrugge, Troy, MI (US);
Yar-ming Wang, Troy, MI (US);
Hong-hsiang Kuo, Troy, MI (US);
Hsai-yin Lee, Troy, MI (US);
Mark W. Verbrugge, Troy, MI (US);
Yar-Ming Wang, Troy, MI (US);
Hong-Hsiang Kuo, Troy, MI (US);
Hsai-Yin Lee, Troy, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
Pistons reciprocating in cylinders of a hydrocarbon-fueled internal combustion engine tend to trap air and unburned fuel between the top of the piston head and its enclosing cylinder wall. The circumferential side surface (or land) of the piston head above its upper piston ring groove is provided with a thin coating of porous aluminum oxide. Particles of an oxidation catalyst for the engine's fuel are electrolytically deposited in the pores of the oxide coating. During engine operation the oxide-supported catalyst particles promote combustion of the entrained fuel.