valvetrain
Sign in to saveAlso known as valve train, poppet valve
right|thumb|Cutaway of a dual overhead camshaft engine thumb |1969 AMC V8 engine|AMC V8 overhead valve engine. The rocker cover has been removed, so elements of the pushrods, rocker arms, valve springs, and valves are visible.
~3 min read
Article
9 sectionsContents
- Layout
- Components
- Camshaft
- Pushrod
- Rocker arm / Finger / Bucket tappet
- Valves
- Valve guide
- See also
- References
right|thumb|Cutaway of a dual overhead camshaft engine thumb |1969 AMC V8 engine|AMC V8 overhead valve engine. The rocker cover has been removed, so elements of the pushrods, rocker arms, valve springs, and valves are visible.
A valvetrain is a mechanical system that controls the operation of the intake and exhaust valves in an internal combustion engine. The intake valves control the flow of air/fuel mixture (or air alone for direct-injected engines) into the combustion chamber, while the exhaust valves control the flow of spent exhaust gases out of the combustion chamber once combustion is completed.