Patent ID: 6260775
Filing Date: 2001-07-17
Classification: F02M

Abstract:
A fuel injector comprising a first, outer valve needle, a second inner valve needle slidable within a passage provided in the outer valve needle, and a load transmitter whereby movement of the outer valve needle can be transmitted to the inner needle, the load transmitter comprising a shoulder associated with the first needle which is cooperable with the second needle to transmit movement of the first needle to the second needle once the first needle has moved beyond a predetermined distance, the shoulder being defined by a surface of a sleeve located within a bore formed in the first needle, wherein the second needle includes a region of increased diameter which is engageable with the shoulder, the region of increased diameter being compressible and being arranged within an enclosed chamber defined by the bore formed in the first needle such that fuel under high pressure acts on the second needle, in use, to urge the second needle against a seating.