Internal-combustion engines – Particular piston and enclosing cylinder construction – Piston
Patent
1995-11-22
1998-11-17
Solis, Erick R.
Internal-combustion engines
Particular piston and enclosing cylinder construction
Piston
123196M, 92223, F02F 310, F02F 312
Patent
active
058362800
ABSTRACT:
A feature of the invention resides in a plating arrangement for a piston that reciprocates within a cylinder. The piston includes a generally cylindrical piston body. The piston body includes a piston head with a nickel plating and a piston skirt with a tin plating provided at the circumference of the piston body. At least one piston ring groove with a molybdenum disulfide plating is provided in the piston skirt at an upper portion of the piston body. A piston ring with a chromium and resin layer is disposed in each of the piston ring grooves. The piston body includes a piston pin hole that defines an inner diameter surface of the piston. The inner diameter surface has a molybdenum disulfide plating. The plating arrangement for the piston enhances lubrication of the piston.
Additionally, the present invention includes a lubricating system for a two-cycle, crankcase compression, diesel engine, comprising a cylinder block and head assembly, the cylinder block and head assembly includes a plurality of cylinders, a piston disposed in each of said cylinders so as to reciprocate in an axial direction of said cylinders, and the oil includes a polyisobutane additive for further enhancing lubrication of the piston.
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1. Patent Abstracts of Japan, vol, 011 No. 213 & JP-A-62 029749.
2. Patent Abstracts of Japan, vol. 018 No. 127 & JP-A-05 312269.
3. European Search Report dated Mar. 13, 1996.
Solis Erick R.
Yamaha Hatsudoki Kabushiki Kaisha
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