Abstract: An injector valve having a stable fuel flow while metering "single point" fuel volumes is disclosed. A metering portion of the injector valve comprises a needle valve and a valve housing including a centrally located valve housing bore that terminates in a truncated conical valve seat and cylindrical metering orifice. A transitional surface connects the valve seat to the metering orifice to gradually change the direction of fuel flow so separation and unstable flow will not occur. The needle valve is concentrically reciprocal within the valve housing bore and closes the metering orifice with a valve tip having a closure surface mating with the valve seat. The valve tip narrows from the closure surface into a pintle which extends through the metering orifice and ends in a deflection cap which shapes the spray of the valve into a hollow-cone pattern.

Abstract: A high flow rate electromagnetic injector valve with a rapid response time is disclosed for utilization in a single point fuel injection system. Centrally bored end caps are fixed at the front and rear ends of a tubular injector body and a coil wound on a bobbin is disposed inside the body chamber between the end caps. The front end cap receives within its bore a valve assembly including a valve housing and a needle valve with attached armature reciprocally movable against a valve seat to obturate a metering orifice in the valve housing. The valve housing contains fuel inlets for the pressurized entry of fuel into the injector and the needle valve is ported to provide fluid communication to the armature to relieve pressure build-up. The rear end cap mounts within its bore a core member acting as a stator which extends through a central bobbin bore to form a controllable air gap adjacent the armature. The core member further contains internally an adjustment screw and ball member.

Abstract: A high flow rate electromagnetic fuel injector valve with a rapid response time is disclosed for utilization in electronic fuel injection systems. The fuel injector valve comprises a stator means and a valve assembly having a self-centering valve member reciprocally mounted in a valve housing. The valve member consists of a ball valve with a semispherical sealing surface connected by a stem to a magnetically attractable cup-shaped armature. The armature is preferably coated with a friction reducing material where it slideably contacts an armature guide bore of the injector valve during its reciprocation. The ball valve of the valve member obturates an exit orifice of the valve housing by sealing against a conical valve seat which has been coined to receive it. Adjacent to the ball valve and conical valve seat interface are vortex generating and metering orifices for the tangential entry of fuel into a swirl chamber of the valve housing.

Abstract: A high flow rate electromagnetic injector valve with a rapid response time and a method for calibrating such injector is disclosed for utilization in a single point fuel injection system. Centrally bored end caps are fixed at the front and rear ends of a tubular injector body and a coil wound on a bobbin is disposed inside the body chamber between the end caps. The front end cap receives within its bore a valve assembly including a valve housing and a needle valve with attached armature reciprocally movable against a valve seat to obturate a metering orifice in the valve housing. The valve housing contains fuel inlets for the pressurized entry of fuel into the injector and the needle valve is ported to provide fluid communication to the armature to relieve pressure build-up.

Abstract: A high flow rate electromagnetic injector valve with a rapid response time is disclosed for utilization in a single point fuel injection system. Centrally bored end caps are fixed at the front and rear ends of a tubular injector body and a coil wound on a bobbin is disposed inside the body chamber between the end caps. The front end cap receives within its bore a valve assembly including a valve housing and a needle valve with attached armature reciprocally movable against a valve seat to obturate a metering orifice in the valve housing. The valve housing contains fuel inlets for the pressurized entry of fuel into the injector and the needle valve is ported to provide fluid communication to the armature to relieve pressure build-up. The rear end cap mounts within its bore a core member acting as a stator which extends through a central bobbin bore to form a controllable air gap adjacent the armature: the core member further contains internally an adjustment screw and ball member.

Abstract: An electromagnetically actuated fuel injection valve and its utilization in a dual plane, single point fuel injection system are disclosed. The single point injection system includes a throttle body having an air induction bore controlled by a throttle assembly for each plane of the internal combustion engine manifold. An integrally formed fuel injector jacket mounts an injector valve above the throttle blade and concentrically with each bore of the throttle body without a hard fuel connection to the valve. The injection valve includes a movable valve needle attached to the armature of an electromagnetic solenoid. The needle seats between an inlet orifice and a metering orifice of a valve housing which is inserted into the accumulation chamber defined by the inner wall of the injector jacket. A flexible or soft connection is maintained between the valve housing and injector jacket to seal the accumulator chamber and to provide for quickly mounting or removing the valve from the system.