Patent ID: 8813694
Filing Date: 2014-08-26
Classification: F01B,F02B,F02F

Abstract:
1. An engine comprising: an engine casing having one or more surfaces that define a first substantially tubular coolant passage with an open end that opens inside the engine casing; a first piston assembly configured to reciprocate relative to the engine casing when the engine is operating, the first piston assembly having one or more surfaces that define a coolant jacket inside the first piston assembly, wherein the coolant jacket has a first opening at an outer surface of the first piston assembly; a first fluid communication conduit having a first end that is rigidly coupled to the first opening in the coolant jacket and a second end that extends through the open end of the first substantially tubular coolant passage; and a pair of opposed pistons inside and configured to reciprocate relative to the reciprocating first piston assembly when the engine is operating.