Patent ID: 6360963
Filing Date: 2002-03-26
Classification: F02M,Y02T

Abstract:
A fuel injector for injecting gaseous fuel into an engine, comprising:a tubular cartridge housing; a valve body in the cartridge housing, including a sleeve, and upper and lower guide collars in the sleeve, the upper and lower guide collars being spaced apart and separated by a cooling chamber; a gas passageway generally between the cartridge housing and the valve body for communicating gaseous fuel to the engine through an outlet port; an elongate valve retained by the guide collars, having an exposed surface in the cooling chamber, the valve being slidable between open and closed positions to open and close the outlet port, respectively; at least one cooling port defined in the sleeve connecting the gas passageway to the cooling chamber, the at least one cooling port located between the upper and lower guide collars communicating with the cooling chamber adapted to communicate gaseous fuel into and out of the cooling chamber, located for cooling the exposed surface of the valve; and a gas seal carried by the valve body engaging the elongate valve, the cooling chamber located between the outlet port and the gas seal such that heat traveling through the elongate valve from the outlet port is cooled by the cooling chamber prior to reaching the gas seal.