Metal working – Method of mechanical manufacture – Prime mover or fluid pump making
Patent
1997-10-03
2000-05-02
Cuda, Irene
Metal working
Method of mechanical manufacture
Prime mover or fluid pump making
295274, B23P 1500
Patent
active
060557265
ABSTRACT:
A water-cooled, two-stroke crankcase compression internal combustion engine for powering a motor vehicle. The engine includes a piston, piston rings, and cylinder bore arrangement that are constructed to inhibit piston ring sticking by cooling the piston ring gaps by holding them against rotation and spraying fuel from a fuel injector toward the gap for cooling it. Overheating of the small end of the connecting rod is inhibited by surface treating portions of the piston to render them harder and less heat conductive. Scuffing of the piston, piston rings, and cylinder bore are reduced by surface treating the area of the head of the piston around the ring grooves so as to trap and retain lubricant. The surface treatment includes the steps of utilizing an acid wash to dissolve and remove silicon particles and subsequently alumitc treating the washed area.
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Ito Eiichi
Okubo Akihiko
Cuda Irene
Yamaha Hatsudoki Kabushiki Kaisha
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