Engine valves

valve typically used to control the timing and quantity of gas or vapour flow into an engine

a pressure release system in turbocharged engines

system to relieve pressure in a combustion engine's crankcase

reciprocating engine valve actuation mechanism

thumb|Roller tappet (shown in red) in an internal combustion engine

type of check valve

valve mechanism for piston engines

Type of rectilinear valve

engine type that controls valves without using conventional cams

250px|thumb|A cylinder head of a four-valve [[Nissan VQ engine]]

device for maintaining zero valve clearance in an internal combustion engine

timing of valve closing in engines

type of steam engine using rotary steam valves

Type of steam engine valve gear with poppet valves driven by rotating cams