three-port engine

three-port engine
The traditional two-stroke engine design incorporating the intake port connecting the crankcase to the atmosphere, the transfer port connecting the crankcase to the combustion chamber, and the exhaust port to evacuate the spent gas from the combustion chamber. The term is used even if the three-port types are used in pairs

Dictionary of automotive terms. 2015.

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  • Three-port — a. Having three ports; specif.: Designating a type of two cycle internal combustion engine in which the mixture enters the crank case through a port uncovered by the piston near the end of its stroke. [Webster 1913 Suppl.] [1913 Webster] …   The Collaborative International Dictionary of English

  • three-port — «THREE PRT, POHRT», adjective. of or having to do with a type of two cycle internal combustion engine having three ports for the intake, transfer, and exhaust …   Useful english dictionary

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