Oblong piston and cylinder for internal combustion engine
Oblong piston rings for internal combustion engine
Oil passage structure of a cylinder head
Oil scraper piston ring
Oilless internal combustion engine having gas phase lubrication
Oilless internal combustion engine having gas phase lubrication
One piece cast steel monobloc piston
One piece piston connected to a connecting rod for high speed fo
Open chamber diesel engine having a piston with recesses therein
Optical test engine, in particular for combustion parameters...
Otto cycle internal combustion engine giving increased performan
Outboard motor including easy withdrawal and insertion of camsha