Abstract: An electrohydraulic servovalve comprising a torque motor which receives an electrical signal and positions a flapper between a pair of opposed nozzles to control a spool valve and a feedback spring connected to the flapper and to the spool of the spool valve. The flapper is connected to an armature of the torque motor. The joint between the armature and the flapper comprises a one part, heat cured thermosetting adhesive.

Abstract: An electrohydraulic servovalve comprising a torque motor which receives an electrical signal and position a flapper of a spring tube and flapper subassembly between a pair of opposed nozzles to control a spool valve and includes a feedback spring connected to the flapper and to the spool of the spool valve.

Abstract: An electrohydraulic system includes a plurality of electrohydraulic devices individually controlled by on-board microprocessor-based control electronics. Each individual device controller is connected to and addressable by a master controller for coordinating operation of the various devices. An electrohydraulic servo valve assembly includes a hydraulic manifold having a valve spool variably positionable therein under control of a torque motor. A microprocessor-based controller is connected to the torque motor and is mounted on the manifold by a cover which encloses and protects both the controller and the torque motor. A watchdog timer in the microprocessor-based controller monitors pulsewidth modulated signals to the torque motor for terminating operation in the event of signal loss. In a preferred embodiment of the invention, the servo valve assembly is coupled to a linear actuator which has its position monitored by an electroacoustic transducer.

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 restrained turbine high dynamic response mass rate of fluid flow sensor for applications to air flow sensing in internal combustion engine fuel controls. The turbine rotor vanes impart an angular momentum change to the fluid in passing through the turbine vanes and signals are generated corresponding to the resulting reaction forces, these signals combined with signals corresponding to the fluid temperature and downstream pressure to yield mass rate of flow output signals. Variations of the turbine rotor support configurations include a friction free flexural restraint comprised of radial webs which may also act as stator vanes, secured to the turbine hub. In several embodiments, reaction forces are sensed by measuring the reactive torque imposed on the turbine rotorand the flexural restraint supporting the rotor provides a rigid support for absorbing the radial and axial forces while being compliant to torque.

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 restrained turbine high dynamic response mass rate of fluid flow sensor for applications to air flow sensing in internal combustion engine fuel controls. The turbine rotor vanes impart an angular momentum change to the fluid in passing through the turbine vanes and signals are generated corresponding to the resulting reaction forces, these signals combined with signals corresponding to the fluid temperature and downstream pressure to yield mass rate of flow output signals. Variations of the turbine rotor support configurations include a friction free flexural restraint comprised of radial webs which may also act as stator vanes, secured to the turbine hub. In several embodiments, reaction forces are sensed by measuring the reactive torque imposed on the turbine rotor and the flexural restraint supporting the rotor provides a rigid support for absorbing the radial and axial forces while being compliant to torque.

Abstract: A fast response fluid temperature sensor is disclosd which consists of a silicon temperature sensing semiconductor chip mounted on an extremely thin fin having a high surface area to mass ratio. The fin and chip combination are mounted in a frame assembly, with the thermal conductivity of the frame assembly being high and the specific heat being low for maximum heat transfer from the fluid being sensed to the silicon chip. The chip and fin assembly are illustrated as being open to the free flow of fluid around the assembly, no insulating material is provided between the fluid media being sensed and the fin and chip assembly, and a protective cage is formed around the fin and chip assembly. Suitable connection is made between one electrical terminal of the chip and the fin and between the other electrical terminal of the chip and the external circuitry, with various modified forms of such connections being illustrated.

Abstract: A method and apparatus for introducing additional air into the intake manifold to aid in the starting of an internal combustion engine. A flapper valve is provided on the throttle valve which is operative according to the pressure differential across the flapper valve blade.

Abstract: A fast response fluid temperature sensor is disclosed which consists of a silicon temperature sensing semiconductor chip mounted on an extremely thin fin having a high surface area to mass ratio. The fin being formed in the shape of a dome to fully enclosed the semiconductor chip and protect the connections thereto from contaminants, mechanical damage and corrosive materials. The fin and chip combination are mounted in a frame assembly, the thermal conductivity of the frame assembly being low and the specific heat thereof being low. Foamed material may be inserted in the dome to further protect the chip and lead thereto from damage.