alloy auto racing bourke engine britalus rotary engine cam camshaft caprotti valve gear cast iron combustion chamber compressed air connecting rod controlled combustion engine crankcase crankshaft cylinder bank cylinder head cylinder head porting d slide valve desmodromic valve ferrari flat engine flathead engine free-piston engine gas turbine h engine heat heat engine hugo lentz ioe engine jet engine metallurgy milk motorcycle multi-valve napier deltic one-stroke cycle opposed piston engine orbital engine peaucellier-lipkin linkage piston piston valve pistonless rotary engine pressure relief valve presta valve quasiturbine radial engine relief valve rocker arm rocket engine rocket engine nozzle rotary engine safety valve schrader valve sentinel waggon works single cylinder engine six stroke engine sleeve valve sodium solenoid spark plug steam engine steam locomotive stellite stelzer engine stirling engine straight engine swing-piston engine tappet tetra-ethyl lead thermodynamic cycle tire twingle engine v engine valve valve float valve gear valve guide valve job valve seat variable valve timing w engine wankel engine