SPLIT-CYCLE FOUR-STROKE ENGINE

摘要

An engine (100) has a crankshaft (108), rotating about a crankshaft axis (110) of the engine (100). An expansion piston (114) is slidably received within an expansion cylinder (104) and operatively connected to the crankshaft (108) such that the expansion piston (114) reciprocates through an expansion stroke and an exhaust stroke of a four stroke cycle during a single rotation of the crankshaft (108). A compression piston (116) is slidably received within a compression cylinder (106) and operatively connected to the crankshaft (108) such that the compression piston (116) reciprocates through an intake stroke and a compression stroke of the same four stroke cycle during the same rotation of the crankshaft (108). A ratio of cylinder volumes from BDC to TDC for either one of the expansion cylinder (104) and compression cylinder (106) is substantially 20 to 1 or greater.