Abstract: A novel flow sensor that includes a valve responsive to a pressure differential or pressure drop across a selectively sized restriction orifice. The flow sensor may be incorporated into a high-pressure fuel injection system for sensing the opening and closing of high pressure fuel injector for injecting gaseous fuel.

Abstract: A novel flow sensor that includes a valve responsive to a pressure differential or pressure drop across a selectively sized restriction orifice. The flow sensor may be incorporated into a high-pressure fuel injection system for sensing the opening and closing of high pressure fuel injector for injecting gaseous fuel.

Abstract: A high pressure gaseous fuel injector for injecting natural gas or other gaseous fuels at high pressures (eg. 300 to 700 psig more or less) into combustion engines for improved efficiency, better performance and reduced environmental emissions. The fuel injector includes an outer cartridge housing and a universal valve cartridge mounted therein. Spring washers are used to urge the valve cartridge against a metal O-ring supported by the outer cartridge housing.

Abstract: A high pressure gaseous fuel injector for injecting natural gas or other gaseous fuels at high pressures (eg. 300 to 700 psig more or less) into combustion engines for improved efficiency, better performance and reduced environmental emissions. The fuel injector is powered by hydraulic signals from an electrohydraulic valve. The fuel injector includes an outer cartridge housing and a universal valve cartridge mounted therein. The cartridge comprises an activator body and a valve body secured together, and the valve body has a gas valve slidable therein. The stroke of the valve is adjustable by controlling the size of shims in the valve body assembly, thereby providing a universal valve cartridge that can be easily adapted to differing fueling requirements for models and sizes of engines. The valve body includes a spring chamber between upper and lower valve guides.

Abstract: A high pressure gaseous fuel injector for injecting natural gas or other gaseous fuels at high pressures (eg. 300 to 700 psig more or less) into combustion engines for improved efficiency, better performance and reduced environmental emissions. The fuel injector is powered by hydraulic signals from an electrohydraulic valve. The fuel injector includes an outer cartridge housing and a universal valve cartridge mounted therein. The cartridge comprises an activator body and a valve body secured together, and the valve body has a gas valve slidable therein. The stroke of the valve is adjustable by controlling the size of shims in the valve body assembly, thereby providing a universal valve cartridge that can be easily adapted to differing fueling requirements for models and sizes of engines. The valve body includes a spring chamber between upper and lower valve guides.

Abstract: A high pressure gaseous fuel injector for injecting natural gas or other gaseous fuels at high pressures (eg. 300 to 700 psig more or less) into combustion engines for improved efficiency, better performance and reduced environmental emissions. The fuel injector is powered by hydraulic signals from an electrohydraulic valve. The fuel injector includes an outer cartridge housing and a universal valve cartridge mounted therein. The cartridge comprises an activator body and a valve body secured together, and the valve body has a gas valve slidable therein. The stroke of the valve is adjustable by controlling the size of shims in the valve body assembly, thereby providing a universal valve cartridge that can be easily adapted to differing fueling requirements for models and sizes of engines. The valve body includes a spring chamber between upper and lower valve guides.

Abstract: Disclosed is a solenoid valve which is useful essentially as a control device for pressure-actuated equipment which responds proportionally to an electric signal transmitted to the valve in accordance with the strength thereof. The valve functions in perhaps its most important utilization to maintain a static pressure which may be varied in accordance with the strength of the current supplied to the solenoid of the valve. The valve is constructed for operation by which an output pressure is modulated, according to the current strength of the solenoid, between two supply pressures admitted to separate portions of the valve. One supply pressure is lesser and the other is greater than generally contemplated output pressure.

Abstract: Described herein is a valve sub-assembly which, e.g., functions as a portion of a modulating valve preferably subjected to operating pressures of less than two atmospheres. This sub-assembly is especially designed to reduce hysteresis in the response of the valve to signal media. Hysteresis reduction is achieved through a departure from conventional sealing mechanism designs which achieves a reduction in the friction involved in the operation of conventional modulating valves.

Abstract: Disclosed is a pressure-sensing transducer in which a transducing unit comprising a semiconductor-type strain element is confined within a housing defining a generally funnel-shaped chamber. The unit is supported within the housing in spaced relationship with the surface of the chamber by an electrically non-conductive cup-shaped member of relatively rigid material, and a resilient electrically non-conductive ring which is yieldably deformed by sealing engagement of outer peripheral surface portions of the ring with the chamber and the inner cup surface of the member, and the inner periphery of the ring with the outer circular surface of the unit. A viscous flow-resistant, electrically non-conductive liquid occupies any open space in the chamber for communicating pressure from a pressure source through the small end of the chamber to the element within the unit.

Abstract: Disclosed herein is a trailer brake control system comprising a trailer-mounted servo-motor type booster in direct operating connection, e.g., by hydraulic lines, with the trailer wheel brakes, an electrical transducer and signal amplification apparatus mounted on the towing vehicle, and a solenoid synchronizing valve for controlling the booster operably positioned between the signal amplification apparatus and the booster for translating electrical signals of varying magnitude into correspondingly varying brake action. The system enables the operator of a tow vehicle and trailer combination to operate the trailer brakes with power-applied effort which is proportional to manual pedal effort applied to the braking system of the tow vehicle, or optionally, to operate the trailer brakes independently of the tow vehicle brakes to any extent desired through manual control of the signal amplification apparatus.

Abstract: A hydraulic booster has its piston located in a normal passive position so that hydraulic fluid supplied to the cylinder through an inlet port enters the cylinder on both sides of the piston. Normally open valve means establishes communication through the piston from one side thereof to the other, and operating means is provided for closing the valve means and moving the piston past the inlet port to a position wherein hydraulic fluid flows through the inlet port into the cylinder on only one side of the piston. The normally open valve means includes an elongated valve sleeve slidably mounted in a piston bore having an enlarged intermediate portion defining a cavity surrounding the sleeve member. The sleeve member has a large external area within the cavity facing in one direction than in the other direction, and a leakage path is provided for communication of the cavity with the cylinder on one side of the piston.

Abstract: A hydraulic servo valve assembly and a control system therefor employing a pneumatic sensor-actuator are disclosed. The servo valve assembly comprises a servo-operated power valve assembly including a differential piston, a solenoid operated override and hysteresis adjustment. The valve assembly is a "snap-action" device wherein the power valve differential piston is selectively positioned through use of the pneumatic sensor controlled servo valve to vent the pressure applied to the larger area reaction surface of the piston.