| 摘要 |
A fitting member (12), in particular for a crankcase ventilation system of an internal combustion engine, having a double wall construction comprised of an inner tube (12A) received in an outer tube (12B), wherein an outer wall of the inner tube is circumferentially spaced from an inner wall of the outer tube for heat insulation between the inner and the outer tubes, and to an internal combustion engine having a gas re-circulation structure for re-circulation of blow-by gas leaking into a crankcase of the engine to an intake passage of the engine, wherein the gas re-circulation structure comprises at least one fitting member (12) having a double wall structure which is comprised of an inner tube (12A) received in an outer tube (12B), wherein the outer wall of said inner tube is circumferentially spaced from the inner wall of said outer tube for heat insulation of the blow-by gas being re-circulated to the intake passage. |
