Abstract: A system for providing LPG fuel to a fuel consuming unit, the system comprising: a storage tank configured to contain the LPG fuel; a heater configured to transfer heat to at least a portion of the LPG fuel; an accumulator configured to receive a portion of the LPG fuel; wherein the accumulator can apply pressure to the LPG fuel within the accumulator and the pressure being greater than the vapor pressure of the LPG fuel within the accumulator.

Abstract: A cover is installed over an engine adjuster such as a carburetor adjustment screw. This cover is in the form of a cap having a flat top with a frangible brim portion. The cap is installed in a housing for the adjustment device, in a recess directly above the adjustment device. An inner rim is formed on the cap beneath the flat top with a recessed portion being formed between the top and the rim. The inner rim of the cap matingly engages a rim which may be formed in the top portion of the adjuster or in a housing surrounding the adjuster and snaps into place joined to either the adjuster or its housing. An anti-pry protective washer or shoulder is provided in the housing. This anti pry device is positioned in close proximity to the outer wall of the inner rim of the cap in a manner to prevent prying instruments from reaching under the inner rim in an attempt to remove the cap.

Abstract: A gaseous fuel injector for an internal combustion engine or a propulsion system using fuel cells has an electromagnetic solenoid with a flat rectangular armature which seats against a seat member to form a valve. The valve is kept in a closed position by the differential between the fuel pressure on one side and the atmospheric pressure or the ambient pressure in the discharge chamber on the other side with additional closing force being provided by a spring which abuts against the armature. With each pulsating actuation of the coil of the solenoid, the armature is driven away from its seat to open the valve formed thereby providing an injection of gas from the injector. The injector has a discharge nozzle which is integrally formed therewith. A centrally located aperture is formed in the armature which along with the side space afforded by the rectangular shape of the armature provides dual apertures for the flow of gas through the injector.

Abstract: The controls for controlling the supply of natural gas fuel for a vehicle are integrated together in a module which is located at the gas tank. Such controls include a high pressure regulator for lowering the pressure of the gas flowing from the tank and an electronically controlled solenoid valve which shuts off the gas flow when no fuel is required by the engine and when the gas pressure in the tank falls below a predetermined value. Also included in the module are a pressure sensor for providing signals for controlling the shutoff valve; a check valve which permits one way flow of gas into the gas tank when it is filled; a pressure relief mechanism responsive to the temperature and pressure sensors for allowing safe release of the gas to the outside should the temperature rise above a predetermined limit.

Abstract: A mixture of gaseous fuel (natural gas or propane) and gasoline is used to fuel the internal combustion engine of a motor vehicle. The ratio of gaseous fuel to gasoline is preadjusted by the manual settings of an electronic processor which is used to change the gasoline fuel injection rate and the manual settings of an air/vacuum balance valve connected to a low pressure regulator and mixer are used to regulate the pressure of the gaseous fuel and mix it with air to provide the desired ratio. The fuel injection is also controlled in response to a signal fed to the processor which is in accordance with the output of the vehicle's exhaust oxygen sensors. The flow rate of gaseous fuel to the engine is controlled by means of a mixer which is preadjusted for a desired flow rate. This flow rate is automatically varied in response to the intake manifold pressure of the engine. This manifold pressure drives a valve which controls the gaseous fuel flow rate.

Abstract: An internal combustion engine is fueled with a controlled mixture of natural gas and air which mixture is regulated by a regulator responsive to an electronic controller. In the event of a system failure with the electronic controller shutting down, a backup regulator automatically bypasses the normal regulator to provide temporary operation with a predetermined acceptable constant gas mixture.

Abstract: A fuel control unit which is formed in a housing such as a load block or carburetor has a passageway with a fuel inlet at one end thereof and a fuel outlet at the other end thereof. A pair of adjusting valves, one for adjusting the amount of fuel flow from a first fuel source such as natural gas and the other for adjusting the amount of fuel flow from a second fuel source such as propane are mounted in the passageway. The valves are positioned to set the sizes of metered passages and are preadjusted to provide the desired fuel flow to provide a proper air to fuel ratio for the fuel from each source. The passageway is alternatively set for proper operation with one or the other fuel sources either by manually positioning a shuttle valve or actuating a solenoid which drives the shuttle valve.

Abstract: A gaseous fuel injector has a ball valve which is spring urged to a closed position. Positioned below this valve is the armature of an electromagnetic solenoid having an extension which abuts against the ball valve. The ball valve is normally closed against a valve seat to prevent passage of gas through the injector. With each actuation of the solenoid, the armature extension drives the ball valve upwardly from its valve seat to provide an injection of gas from the injector. The ball valve member, limit stops on the armature, and the surface along which the armature slides are all fabricated of durable, heat resistant plastic material which resists wear, provides low friction and are dimensionally stable over varying environmental conditions.