variable exhaust port — See adjustable variable exhaust port … Dictionary of automotive terms
Variable — Va ri*a*ble, a. [L. variabilis: cf. F. variable.] [1913 Webster] 1. Having the capacity of varying or changing; capable of alternation in any manner; changeable; as, variable winds or seasons; a variable quantity. [1913 Webster] 2. Liable to… … The Collaborative International Dictionary of English
Variable quantity — Variable Va ri*a*ble, a. [L. variabilis: cf. F. variable.] [1913 Webster] 1. Having the capacity of varying or changing; capable of alternation in any manner; changeable; as, variable winds or seasons; a variable quantity. [1913 Webster] 2.… … The Collaborative International Dictionary of English
Variable stars — Variable Va ri*a*ble, a. [L. variabilis: cf. F. variable.] [1913 Webster] 1. Having the capacity of varying or changing; capable of alternation in any manner; changeable; as, variable winds or seasons; a variable quantity. [1913 Webster] 2.… … The Collaborative International Dictionary of English
adjustable variable exhaust port — A device used on two stroke engines which automatically alters or varies the exhaust port size … Dictionary of automotive terms
exhaust port — [1] The passage in the cylinder head which connects the exhaust valve and the exhaust manifold. The exhaust gases pass through the port to the exhaust manifold or header. [2] On two stroke engines the exhaust port is cut into the cylinder wall… … 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
Variable displacement — is an automobile engine technology that allows the engine displacement to change, usually by deactivating cylinders, for improved fuel economy. The technology is primarily used in large, multi cylinder engines. Many automobile manufacturers have… … Wikipedia
Exhaust gas recirculation — (EGR) is a nitrogen oxide (NOx) emissions reduction technique used in most gasoline and diesel engines.EGR works by recirculating a portion of an engine s exhaust gas back to the engine cylinders. Intermixing the incoming air with recirculated… … Wikipedia
Variable valve actuation — Variable Valve Actuation, or VVA, is a generalised term used to describe any mechanism or method that can alter the shape or timing of a valve lift event within an internal combustion engine. There are many ways in which this can be achieved,… … Wikipedia
