Fuel injection valve and single point system

A fuel metering assembly including a rapid substitution injection valve for single point and multipoint fuel injection systems, said valve assembly comprising;

• an independently formed injector jacket having a fuel inlet passage for receiving pressurized fuel and for communicating said fuel to an accumulation chamber defined by an inside wall of said fuel injection jacket;
• said injector jacket further having a fuel exit passage directly connected to the accumulation chamber for communicating said fuel from the accumulation chamber, the inlet and exit fuel passages supplying said accumulation chamber with a circulating quantity of fuel under a substantially constant pressure;
• a rapid substitution injection valve including a solenoid and armature which are operably enabled by electronic control signals to the solenoid to produce relative movement between said armature and solenoid;
• a needle valve slideably reciprocable in a bore of a valve housing and having a valve tip that seals a metering orifice located at one end of the valve housing, said needle valve afixed to said armature such that the control signals will open and close the metering orifice;
• at least one inlet orifice formed in the valve housing and disposed such that said inlet orifice is proximate to the valve tip and metering orifice, said proximity causing the inlet orifice to provide substantially no restriction to a metered fuel flow through the inlet orifice to the metering orifice;
• said valve housing of said injection valve being inserted into a pair of mounting apertures formed in said injector jacket such that said inlet orifice of the valve housing communicates with said accumulation chamber and said metering orifice extends outside of said accumulation chamber, means for hydraulically sealing said valve housing and said accumulation chamber from fuel leakage.