valve cam
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valve — A device used to either open or close an opening to allow or prevent the flow of a liquid or gas from one place to another. There are many different types. See ABS relay valve accumultor valve air valve carburetor air control valve air gulp valve … Dictionary of automotive terms
Valve float — is an adverse condition which occurs when the poppet valves on an internal combustion engine valvetrain do not remain in contact with the camshaft lobe during the valve closure phase of the cam lobe profile. This reduces engine efficiency and… … Wikipedia
valve lash — Valve tappet clearance or total clearance in the valve operating train with cam follower on camshaft base circle. Also see valve clearance … Dictionary of automotive terms
Valve gear — The valve gear of a steam engine is the mechanism that operates the inlet and exhaust valves to admit steam into the cylinder and allow exhaust steam to escape, respectively, at the correct points in the cycle. It is sometimes referred to as the… … Wikipedia
Cam-in-block — The cam in block valvetrain layout of piston engines is one where the camshaft is placed within the cylinder block, usually beside and slightly above the crankshaft in a straight engine or directly above the crankshaft in the V of a V engine.… … Wikipedia
valve lifter — [1] The cylindrically shaped component that presses against the lobe of a camshaft and moves up and down as the cam lobe rotates. Most valve lifters have an oil lubricated hardened face that slides on the cam lobe. So called roller lifters,… … Dictionary of automotive terms
valve spring — A small coil spring that closes the valve after it has been opened by the cam, and prevents the valve from bouncing on its seat. The action of the spring keeps the lifter in contact with the cam. If the spring is weak, noise will be generated and … Dictionary of automotive terms
Valve shim — A valve shim is a disc of hardened metal of precisely calibrated height used to adjust the clearance (US:lash) between a cam lobe and the valve on which it operates where the cam lobe operates directly on the valve without an intermediate rocker… … Wikipedia
Valve — This article is about the flow control device. For the game developer, see Valve Corporation. For the electronic component, see Vacuum tube. For other uses, see Valve (disambiguation). These water valves are operated by handles. A valve is a… … Wikipedia
valve — valveless, adj. valvelike, adj. /valv/, n., v., valved, valving. n. 1. any device for halting or controlling the flow of a liquid, gas, or other material through a passage, pipe, inlet, outlet, etc. 2. a hinged lid or other movable part that… … Universalium
cam — /kam/, n., v., cammed, camming. n. 1. Mach. a disk or cylinder having an irregular form such that its motion, usually rotary, gives to a part or parts in contact with it a specific rocking or reciprocating motion. 2. Auto. Slang. camshaft. v.t. 3 … Universalium
