Patent ID: 7900603
Filing Date: 2011-03-08
Classification: F02M

Abstract:
1. An automobile-use high pressure fuel injection accumulator-distributor comprised of a rail body of the automobile-use high pressure fuel injection accumulator-distributor to which pipe attachment holders for attachment of fuel distribution pipes distributing fuel to injection nozzles at equal pressures are joined by liquid phase diffusion bonding or another joining method, said automobile-use high pressure fuel injection accumulator-distributor characterized in that each said holder is comprised of a tube part at the pipe side and a partial cone-shaped holder skirt (tapered part) at the end of the rail body side, each said holder skirt has a shape spreading in a partial cone shape toward the joint face end with an angle from the holder tube part side face of 10° or more in a range of a length of 2 mm or more in the holder axial direction at the outer circumference of the end of the holder at the joint face side, said rail body has holder joint position determining guide grooves at its holder joint positions, each said guide groove is comprised of a groove inner circumferential wall of a size enabling engagement with a holder joint inner circumference, a groove bottom forming a joint face with the holder, and a groove outer circumferential wall of a partial cone shape bulging out to the inner side parallel to the holder skirt from the groove bottom toward the holder side at a depth of 2 mm or more, and a metal ring is plastically deformed and press-fit into a clearance of 0.5 mm or more between each said holder skirt and said groove outer circumferential wall and parallel to the joint face, whereby a constant compressive stress is applied cold to the joint face.