O-ring retainer for a fuel injector in a fuel rail socket
O.sup.2 -sensor fault diagnosis method and apparatus
Oblong piston and cylinder for internal combustion engine
Oblong piston rings for internal combustion engine
Obstruction of flow to improve flow mix
Obtaining energy from waste products by the pyrolysic process us
Octane booster for engines
Octane enhanced natural gas for internal combustion engine
Odd-cylinder V-type internal combustion engine
OFF-ON-START switching system for diesel engines, and particular
Offset connecting rod for internal combustion engines
Offset crankshaft engine
Offset crankshaft mechanism for an internal combustion engine
Offset starter pawl
Offset tappet assembly
Offset valve lifter effecting valve rotation
Offset variable valve actuation mechanism
OHC engine
OHC vertical crankshaft engine
OHV and gear mechanism for engine