Patent ID: 7017536
Filing Date: 2006-03-28
Classification: F02B,F02F,F02G,Y02T

Abstract:
1. An engine comprising: a crankshaft, rotating about a crankshaft axis of the engine; a power piston slidably received within a first cylinder and operatively connected to the crankshaft such that the power piston reciprocates through a power stroke and an exhaust stroke of a four stroke cycle during a single rotation of the crankshaft; a compression piston slidably received within a second cylinder and operatively connected to the crankshaft such that the compression piston reciprocates through an intake stroke and a compression stroke of the same four stroke cycle during the same rotation of the crankshaft; and a gas passage interconnecting the first and second cylinders, the gas passage including an inlet valve and an outlet valve defining a pressure chamber therebetween, the outlet valve permitting substantially one way flow of compressed gas from the pressure chamber to the first cylinder; wherein a controller initiate combustion in the first cylinder between 5 degrees and 40 degrees of rotation of the crankshaft after the power piston has reached its top dead center position.