INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To restrict influence against surrounding environment by releasing intentionally pressure from a prescribed location even if an internal pressure in the main body of an internal combustion engine is increased by the blow-by gas in the engine in which a breather chamber for use in separating gas and liquid from blow-by gas generated in the main body of the engine is formed inside a head cover connected to a cylinder head while a gasket is held between it and the cylinder head and one end of a hose for guiding blow-by gas to an air cleaner side is connected to an outlet pipe provided in the head cover so as to derive the blow-by gas from the breather chamber.SOLUTION: There is provided a releasing mechanism 43 at an outlet pipe 39 so as to release blow-by gas outside by removing a hose 41 from the outlet pipe 39 in response to a state in which a pressure of blow-by gas in the main body of an internal combustion engine becomes a prescribed pressure or more.