Abstract: A gas supply structure includes a nozzle having a gas supply passage, and a receptacle having an insertion hole into which the nozzle is inserted to achieve connection, wherein the receptacle is provided with a first O-ring that is provided in the vicinity of the insertion hole for the purpose of gas sealing, and a second O-ring that is provided further downstream the gas supply path than the first O-ring for the purpose of gas sealing, a portion of the second O-ring is bonded to a recessed section in the receptacle using a bonding material, and a foreign matter removal member is positioned closer to the insertion hole than the second O-ring. The foreign matter removal member is provided within the receptacle so as to partially protrude from an inner peripheral surface that extends from the insertion hole of the receptacle.

Abstract: In an internal combustion engine to which an air pressure actuation mechanism such as a variable vibration isolating support device is installed side by side, the engine speed at the time of idling is made to suitably converge on the target idling speed.