Patent ID: 6938901
Filing Date: 2005-09-06
Classification: F02M

Abstract:
1. A seal structure comprising: a mounting hole that mounts an injector and is disposed in an engine head; an annular attachment groove disposed in the injector; and a resin-made combustion gas seal for injectors that is attached to the attachment groove, seals an annular space between the mounting hole and a groove bottom of the attachment groove, and can slide along the groove bottom of the attachment groove, wherein an inclined surface, in which a clearance between the inclined surface and an inner peripheral surface of the mounting hole narrows towards an opposite-pressurized side, is disposed at the groove bottom of the attachment groove, and the combustion gas seal for injectors, due to pressure from a pressurized side, slides toward the opposite-pressurized side and is subjected to reactive force from the inclined surface, and that component of force generates a surface force on the inner peripheral surface of the mounting hole.