Patent ID: 6659371
Filing Date: 2003-12-09
Classification: F02M,F16J

Abstract:
A seal for a fuel injector for an internal combustion engine, wherein the fuel injector includes an injector body surrounding a reciprocating injector jet needle, supported by a tappet rod, an end of the tappet rod extending into an enclosure within the injector body, surrounding one or more structures for enabling the supported reciprocating movement of the injector jet needle, for providing a liquid-tight seal between the tappet rod and the enclosure, for precluding the intrusion of liquid fuel into the enclosure, the seal for a fuel injector for an internal combustion engine comprising:a flexible bellows member, including a first cap sealingly joined to a second cap; the first cap including a first collar for connection to one of a tappet rod of a fuel injector and regions proximate an aperture into an enclosure through which a tappet rod of a fuel injector passes, the first cap further including a substantially radially extending flare and a second collar; the second cap including a first collar for connection to the other one of regions proximate an aperture into an enclosure through which a tappet rod of a fuel injector passes and a tappet rod of a fuel injector, the second cap further including a substantially radially extending flare and a second collar; the second collar of the first cap being sealingly joined to the second collar of the second cap; whereupon installation of the seal into a fuel injector, the seal precludes intrusion of liquid fuel at the aperture of the enclosure.