Overhead camshaft engine
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An overhead camshaft engine is a piston engine in which the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines, where the camshaf
OHC cylinder head (for a 1987 Honda D15A3 engine)
SOHC design (utilizing a rocker arm)
DOHC design (with separate cams for intake and exhaust valves)
Rubber timing belt during installation
Variable valve timing
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Variable valve timing is the process of altering the timing of a valve lift event in an internal combustion engine, and is often used to improve performance, fuel economy or emissions. It is increasin
Overhead camshaft engine
…Although each major manufacturer has their own trade name for their specific system of variable cam phasing systems, overall they are all classified as variable valve timing. The rotation of a camshaft is driven by a crankshaft. Many 21st century engines use a toothed timing belt made from rubber and kevlar to drive the…
Cylinder head of Honda K20Z3. This engine uses continuously variable timing for the inlet valves
Hydraulic vane-type phasers on a cut-out model of Hyundai T-GDI engine