scavenge stroke

scavenging stroke

noun
  1. (in a reciprocating engine) the stroke of a piston in a four-stroke cycle that pushes the burnt gases out as exhaustAlso called: exhaust stroke
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012