Piston with oxidation catalyst

Details Piston with oxidation catalyst Piston with oxidation catalyst

2006-06-27

2006-06-27

McMahon, Marguerite (Department: 3747)

Internal-combustion engines

Particular piston and enclosing cylinder construction

Piston

C123S536000, C092S223000, C029S888048

Reexamination Certificate

active

07066132

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.

REFERENCES:
patent: 3263310 (1966-08-01), Rosen
patent: 5435873 (1995-07-01), Penrice
patent: 5469777 (1995-11-01), Rao et al.
patent: 5477820 (1995-12-01), Rao

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