- Cams located on the camshaft that open and close the intake and exhaust valves in time with the motion of the piston. Cam lobes control the valve lift, and there is a direct relationship between the shape of the cam lobes and the way the engine performs in different speed ranges.
Aviation dictionary. 2014.
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cam lobes — The bumps on a cam that contact and activate such devices as the lifters, which operate the valves, and the rubbing block, which causes the points to open and close, as the cam spins with the distributor shaft … Dictionary of automotive terms
Cam — A cam is a projecting part of a rotating wheel or shaft that strikes a lever at one or more points on its circular path. The cam can be a simple tooth, as is used to deliver pulses of power to a steam hammer, for example, or an eccentric disc or… … Wikipedia
cam follower — The unit that contacts the end of the valve stem and the camshaft. The follower rides on the camshaft and when the cam lobes move it upward, it opens the valve. Also called valve lifter or tappet … Dictionary of automotive terms
cam lobe — See cam lobes … Dictionary of automotive terms
cam —  A designed bump on a shaft or disc which causes a rocking motion in an adjacent part.  A metal disc with irregularly shaped lobes used in the camshaft to activate the opening and closing of the valves and in the distributor, to force the… … Dictionary of automotive terms
double overhead cam — (DOHC) An engine with two camshafts located above the cylinders. One drives the intake valves and the other operates the exhaust valve. In a single overhead cam engine (SOHC), one cam has enough lobes to drive both the intake and exhaust valves.… … Dictionary of automotive terms
cloverleaf cam — n. a style of mortise cylinder cam with three lobes: a ball shaped longer center, and angular projections on either side … Locksmith dictionary
distributor cam — The cam at the top of the distributor shaft with as many lobes as there are cylinders, acting on the heel of the contact breaker arm … Dictionary of automotive terms
Variable valve timing — Variable valve timing, or VVT, is a generic term for an automobile piston engine technology. VVT allows the lift or duration or timing (some or all) of the intake or exhaust valves (or both) to be changed while the engine is in operation. Two… … Wikipedia
VTEC — is also an abbreviation for the verocytotoxin producing Escherichia coli strain O157:H7 .: For the education institution, see Virginia Tech. VTEC (Variable Valve Timing and Lift Electronic Control) is a valvetrain system developed by Honda to… … Wikipedia