Abstract: An improved gasifier and engine system which includes an air compressor, a fixed-bed gasifier, a gas cleansing device and a diesel-cycle internal combustion engine. Ambient air is compressed by the compressor to a predetermined first pressure and is directed to a chamber of the gasifier which contains a batch loaded charge of coal and/or other expendable conditioning materials such as water, limestone and sand. The gasifier partially burns the charge and produces high pressure and temperature fuel gas which is cleaned up prior to exiting the gasifier chamber. The cleaned hot fuel gas is directed to the engine where an injection device injects the fuel gas into a combustion chamber of the engine during a later portion of a compression phase of the diesel cycle. The injected fuel gas is ignited in the engine combustion chamber by a glow plug or other ignition-assist device.

Abstract: A combined fuel engine for reduced emission pollution in which the engine is provided with a conventional fuel injection system for injecting a conventional fuel such as gasoline or diesel oil high in carbon into a combustion chamber proximate the cycle time of peak compression and with an auxiliary fuel injection system for injecting an auxiliary fuel such as methanol, ethanol or liquefied natural gas high in hydrogen into the combustion chamber with the charge of air proximate the cycle time of low compression with means for varying the proportion of fuels to achieve a lean combustible mixture.

Abstract: A gaseous fuel injector valve for diesel engines having access to the combustion chamber of a cylinder to supplement diesel fuel with natural gas, the valve being adapted to supply gaseous fuel by a programmed electronic control circuit which regulates the valve operation to be in accord with certain sensed engine operation parameters and in timed sequence with the crankshaft position for the optimum time to introduce gaseous fuel.

Abstract: Arrangement for the metering of fuel, in particular liquid gas, to a variable-output consumer, which comprises a metering device with a reduction valve (4), a metering valve (11) and a chamber (20, 21) arranged therebetween, as well as means of control or regulation for the setting of the valves as a function of operating variables, in particular for controlling the metering valve (11) as a function of a power requirement signal. For the purpose of high precision metering which is suitable even for the requirements of a lambda control, the arrangement is made such that the means of regulation act on the setting of the reduction valve (4), the chambers (20, 21) between the two valves being designed as a buffer volume for the equalization of pressure fluctuations.

Abstract: An internal combustion engine is designed to run on natural gas and utilize the diesel cycle. To promote combustion, a mixing chamber is dispersed within a combustion chamber formed between the piston and cylinder. The chamber includes a pair of concentric housings, the innermost of which receives fuel from the injector and provides a rich mixture in the volume between the housings.

Abstract: This is concerned with a method of operating a dual-fuel engine, meaning an engine that is supplied with a mixture of gaseous fuel and air which is ignited by an injection of a small amount of so-called pilot oil which is diesel fuel. Additionally the invention is concerned with a method of operation that injects an approximately constant amount of pilot oil regardless of speed variations so as to save fuel at the higher speeds and is specifically applicable or useful with over-the road dual fuel engines, meaning mobile units on trucks, tractors, etc.

Abstract: A gaseous fuel injection system for internal combustion engines features a "variable-pressure-controller" which translates a varying negative pressure, sensed in the engine's air intake system by means responsive to the rate of flow of the intake air, into a proportionately varying amount of gaseous fuel at a positive pressure. That fuel is then injected into the engine's air intake system upstream or downstream of the throttle valve through flow restrictor means which cooperate with the variable-pressure-controller to provide an amount of fuel proportionate to the rate of air flow through the engine's air intake system. The invention is entirely mechanical-pneumatic in operation and readily adapted to a wide variety of liquid fueled engines, carbureted as well as fuel injected, or to one for gaseous fuel only.

Abstract: A dual fuel compression ignition engine (10) comprises a gas fuel supply system (20-25) for the engine (10), and a diesel fuel supply system (12-16) for the engine, including an injection pump (11) having a governor and a control member to control the amount of diesel fuel injected into the engine by the pump (11), and means (13') to arrest movement of the control member (11a) in the direction to increase the supply of diesel fuel to the engine, at a position to supply pilot fuel at a constant, or substantially constant, rate, the position for arrest being determined in accordance with at least one operating condition of the engine, such as the engine speed. Another embodiment shows a present rail system. In both, the amount of pilot diesel fuel is adjusted by a feed-back signal indicative of the amount of pilot fuel injected.

Abstract: A carburetion system to adapt a motor vehicle to use either liquid gasoline fuel or compressed hydrocarbon gas fuel including a diaphragm operated valve to control the flow of hydrocarbon gas to the motor where one side of the diaphragm is connected to the partial vacuum arising from induction flow of fuel to vary the opening of the valve proportional with the required fuel supply to the motor.

Abstract: The fuel injection valve has a central aperture for the injection of diesel oil into a combustion chamber as well as additional apertures above the central aperture for selective injection of diesel oil. The valve is controlled so that a needle valves opens only the central aperture when diesel oil is to be injected as an ignition fuel during gas operation. The needle valve is moved a greater distance to open all the apertures when diesel operation occurs.

Abstract: This is a dual fuel engine, meaning an engine that is operated with straight diesel fuel or with gaseous fuel and pilot injection of diesel fuel, the invention is primarily concerned with dual fuel engines for use in over-the-road vehicles but it has other applications. The invention also contemplates using the heat from the cooling water of the jackets of the engine to vaporize a liquid fuel into a gaseous state which is thereafter injected directly into the cylinders of the engine during operation on the dual fuel cycle.

Abstract: Disclosed herein is an apparatus which is adapted for controlling fuel flows for dual fuel compression ignition engines. The disclosed system includes a lag fuel governing system in conjunction with a lead fuel governing system which includes spontaneous motion metering means.

Abstract: A device for preventing abnormal flow of gas fuel from a gas fuel injector of a diesel engine. The device has a pipe for supplying a pressurized gas fuel, a fuel injector including a passage connected to the pipe and leading to fuel injection nozzle ports, and a fuel cut-off valve means adapted to close the gas fuel passage upon detection of a reduction of the fuel pressure in the fuel passage. Any abnormal supply of fuel due to stick of the fuel injector is prevented so as to avoid any risk of explosion which otherwise may be caused by the abnormal supply of the gas fuel.

Abstract: An air-gas mixing device of the type used to mix air and gaseous fuel as a gaseous fuel charge for an internal combustion engine. Fuel and air valves for controlling the air/fuel mixture are coupled together and actuated by a diaphragm in response to a fluid pressure signal, derived from the intake manifold pressure of the engine, acting on the diaphragm. The fuel valve is also independently acutated by a stepper motor mounted to the diaphragm and operated by a remote electrical control signal from a controller designed to measure engine performance and provide a signal to correct any deficiencies in the air/fuel mixture such as a feedback controller receiving inputs from oxygen, speed and other sensors for measuring engine performance. Becuase of the dual control of the fuel valve, the device is capable of handling a wide range of gaseous fuels of different BTU content and of providing a more optimum air/fuel mixture for better fuel economy, emissions control and engine performance.

Abstract: A fuel supplying device for an internal combustion engine and particularly the engine of an outboard motor operating on the two-stroke principle. The engine is provided with a charge forming device and induction system that is supplied with a liquid fuel having a quality lower than gasoline. A source of pressurized gaseous fuel is also provided for selectively supplying a higher quality fuel to the engine under certain running conditions.

Abstract: A fuel control system for an internal combustion engine fuelled by a gaseous fuel and a liquid fuel, comprises liquid fuel flow rate control means, and gaseous fuel flow rate control means. The liquid fuel and gaseous fuel flow rate control means are adapted to control the relative proportions of each fuel supplied to the engine, and permit the relative proportion of liquid fuel to be varied in the range having an upper limit of substantially 100%. The gaseous fuel flow rate control means includes gaseous fuel flow rate determination means which is responsive to engine variables, such as engine speed and throttle position to determine from said variables a desired gaseous fuel flow rate. The gaseous fuel flow rate determination means is adapted to generate a signal indicative of said desired gaseous fuel flow rate. This signal can be used to actuate a valve controlling the gaseous fuel flow rate.

Abstract: An improved carburetion system for gaseous fueled, spark ignited, internal combustion engines that includes pressure regulating and sensing apparatus to vary or cause the variation of the fuel/air ratio to automatically compensate for changes in the heating value and chemical composition of fuels being burned in the engine.

Abstract: A pilot fuel regulating system includes a pilot fuel governor for supplying varying amounts of pilot fuel to an engine. A piston housed within an elongated bore moves longitudinally therein in response to changing engine speeds to regulate the flow of fuel through the governor. A minor diameter portion and chamfer portion of the piston allow the passage of varying amounts of fuel through the bore. In preferred embodiments, the minor diameter portion is elongated to define a moving reservoir within the bore for dampening fuel pressure oscillations.

Abstract: A gaseous fuel injection unit for internal combustion engines fed with gaseous fuel such as liquefied petroleum gas or methane, comprises at least one volumetric measuring device (7) arranged to feed during each engine cycle a determined volume related to the piston displacement, and into which there is fed and respectively discharged that quantity of gaseous fuel complying with the required mixture ratio of fuel to air drawn in by the engine during each cycle. A control unit (5) senses operating pressures along the intake pipe system (1), namely in the injection zone (19) and in the zone (18) downstream of the throttle valve (2), in order to control an expander unit (10, 11) which feeds the gaseous fuel to the volumetric measuring device (7) at a pressure equal to the sum of the absolute values of the two pressures at the aforesaid points, and to control said volumetric measuring device.

Abstract: The circulatory fuel oil injection supply system of a diesel engine is adapted so that the engine may be run selectively either in a single fuel mode on diesel oil alone or in a dual-fuel mode on both diesel oil and gas. The control system and fuel system of the engine are modified so that pressure conditions at a diesel oil injection metering device during the single-fuel mode are mimicked by a first flow restrictor during the dual-fuel mode. A pressure sensor measures the mimicked pressure and controls the amount of gas flow to the engine via an electronic programmable control. A shut-off first solenoid valve operative in the single-fuel mode circuit is by-passed in the dual-fuel mode while second and third solenoid valves are operative to open a by-pass line including a second flow-restrictor and to open a reference pressure supply line respectively. A governor control and a throttle control having a by-pass weep line remain operative in both the single-fuel mode and in the dual-fuel mode.

Abstract: A control system for a dual fuel engine using primary diesel fuel and supplemental gas fuel such as propane or natural gas includes a control valve that controls supplemental fuel mixing with intake air by using an air deflectable member that controls the position of a valve controlling the admission of supplemental gas to the engine intake airstream. A damper is provided on the air flow responsive member to improve valve operation and a lost motion connection is provided between the air flow responsive member and the control valve element to permit independent movement of the elements. Normal flow of supplemental fuel to the control valve is further modulated in response to certain engine operating conditions using an engine condition comparator that generates a control signal used by the supplemental fuel pressure regulator to further modulate the supply of supplemental fuel to the intake airstream.

Abstract: A gas valve driving apparatus of a gas engine in which a gas supply passage is connected to an intake means of the engine, comprises a gas valve arranged in the gas supply passage; a gas valve cam provided on a cam shaft in a cam chamber formed by a cylinder block of the engine and being independent of an intake cam and an exhaust cam on the cam shaft; and connecting means operable to connect the gas valve cam and the gas valve together, so that the gas valve cam may drive the gas valve through the connecting means. The connecting means may be provided with a rocker arm or may be provided with a tappet. The tappet and the gas valve are aligned on a same line extending toward the center of the cam shaft.

Abstract: A gas-diesel dual fuel engine operative with both a gaseous fuel and a diesel fuel oil. The engine has an electronic governor circuit adapted to receive both a speed signal representing actual speed of engine and a set speed signal representing a predetermined command speed of the engine, electric actuators adapted to actuate a diesel fuel injection pump and a gaseous fuel regulating valve, respectively, in response to the signal from the electronic governor circuit, and a mode switching control circuit connected to the electronic governor circuit and adapted to switch the operation of the electric actuators between a diesel fuel operation mode and a gaseous fuel operation mode.

Abstract: In a diesel engine, the improvement of a fuel control system for use in providing a timed supply of gaseous fuel from a high pressure source to each air input. The control system comprises a flow control valve associated with each air input, the flow control valve being adapted to open to communicate with its associated air input and to close to interrupt communication with its associated air input. A fuel supply system is provided for supplying gaseous fuel under pressure to each flow control valve. A sensor is provided for determining when diesel fuel is being injected into each cylinder and generating a control signal which indicates when fuel injection occurs and communicates the control signal to the fuel control valve associated with the cylinder which is next in the firing order to that receiving diesel fuel such that the control signal is effective to open said flow control to admit gaseous fuel to the input air of said cylinder which is next in firing order.

Abstract: Apparatus for enabling an engine to burn either liquid fuel or gaseous fuel, which apparatus comprises: a gaseous fuel control valve for installation in a gaseous fuel supply line leading from a gaseous fuel storage container to an intake manifold of the engine, a liquid fuel shut-off valve for shutting off the supply of liquid fuel when the engine is to run on gaseous fuel, and a gaseous fuel shut-off valve for shutting off the supply of gaseous fuel when the engine is to run on liquid fuel, the gaseous fuel control valve being such that it has a diaphragm which is positioned in a chamber and which operates in association with a gas inlet and a gas outlet to the chamber to apportion the gaseous fuel to the engine in dependence upon the operating requirements of the engine.

Abstract: A gaseous fuel carburetor includes a gas flow control valve movable both by the engine intake air stream via a vane member in the intake air duct and by a fluidic (e.g., vacuum) actuator in the valve assembly, the actuator being controllable in response to engine load demand, whereby the total gas valve opening is responsive to intake air flow and engine load. A motion damper for the valve is included, and a dual gas/liquid fuel supply system is also described wherein the air vane can be retracted to a nonobstructing position relative to the air duct when the supply of gas fuel is ceased.

Abstract: A method and apparatus is provided for propelling a hydrogen engine with ogenically stored hydrogen, wherein a pump, cooled down to an operating temperature close to the hydrogen boiling point, feeds hydrogen to the fuel-injection hydrogen engine. In order to improve the method and the apparatus so that the pump need not be maintained constantly at the operating temperature, it is proposed that the pump, when its temperature exceeds its operating temperature level, be purged with cold hydrogen gas and thus cooled down until its temperature drops to the operating level, and that the hydrogen gas that has been passed through the pump be utilized to propel the hydrogen engine in a partial-load range.

Abstract: A dual fuel supply for a piston engine in which there is one fuel supply means for a running fuel of low volatility and another fuel supply for a starting fuel of high volatility. The starting fuel is contained in safe scaled pressurized cartridges. The temperature of the running fuel is raised to improve its combustion characteristics.

Abstract: In a gaseous fuel carburetion system in which air and gaseous fuel are mixed in a mixer prior to induction into an internal combustion engine, and in which the rate of flow of the induction air is controlled by throttling the intake of the air/fuel mixture, and in which gaseous fuel is supplied to the system from a pressurized source, an improved method and apparatus for regulating the supply of gaseous fuel to the air/fuel mixer is provided. The method comprises the steps of; sensing at least one operating parameter of the engine which is a function of the induction air flow rate and generating a control signal which varies in response to changes in the induction air flow rate, controlling the rate of flow of the gaseous fuel from the source to the mixer by means of said control signal whereby the rate of flow of the gaseous fuel varies in response to the sensed changes in the parameters related to the air flow rate.

Abstract: A control system for a dual fuel engine using primary diesel fuel and supplemental gas fuel such as propane or natural gas includes a control valve that controls supplemental fuel mixing with intake air by using an air deflectable member that controls the position of a valve controlling the admission of supplemental gas to the engine intake airstream. A damper is provided on the air flow responsive member to improve valve operation and a lost motion connection is provided between the air flow responsive member and the control valve element to permit independent movement of the elements. Normal flow of supplemental fuel to the control valve is further modulated in response to certain engine operating conditions using an engine condition comparator that generates a control signal used by the supplemental fuel pressure regulator to further modulate the supply of supplemental fuel to the intake airstream.

Abstract: A uniflow dual fuel engine including a plurality of cylinders, a piston in each cylinder, inlet ports arranged around each cylinder to be uncovered by downward movement of the piston in the cylinder. Air is forced into the cylinder through the inlet ports and there is a fuel injector to pump diesel fuel into the cylinder. There is an inlet pipe extending into one end of the port of each cylinder to end immediately adjacent the interior of the cylinder and connected at its distal end to a gas source.

Abstract: A system for improving the efficiency of an internal combustion engine, and thereby improving fuel economy while reducing emissions is disclosed, which comprises providing a stream of vaporized fuel from a vaporization chamber to the air intake stream of the engine. Surprisingly, this system is suitable for use with both diesel and gasoline engines of conventional and rotary type, as well as jet engines and other internal combustion engines. Entraining about 0.05-1.0% of the total fuel consumed in the air intake stream according to this system results in a substantial improvements of fuel economy (up to 36% improvement over the same engine without the vaporization system) while reducing pollutants at least one order of magnitude below the current standards.

Abstract: A diesel engine is designed to burn on a mixture of liquid fuel or diesel, and liquefied petroleum gas, or gas. The diesel is injected into the cylinders as is conventional on diesel engines. The gas is mixed into the intake air. The output of the governor connects to a diesel control and a gas control. As more fuel is consumed, both the amount to diesel and the amount of gas is increased; however, the amount of diesel is increased. At no load, the engine operates on about 76 percent diesel and 24 percent gas. At 100 percent load, the engine operates on about 80 percent gas and 20 percent diesel. A special gas valve includes a sleeve in a cylinder with an axially moveable plug. The sleeve may be rotated in the cylinder so that the inlet and outlet ports are changed.

Abstract: A control system for an auxiliary gaseous fuel supply system for an internal combustion engine utilizing a primary liquid fuel supply includes a pressure regulator that is controlled by two pressure signals generated in response to engine operating conditions to enable the pressure regulator to respond more rapidly to changes in engine operating conditions. A valve in the pressure regulator is controlled by a diaphragm subjected on its opposite sides to a pair of pressure signals, one of the signals corresponding to the usual long term gas fuel demand signal which primarily controls the position of the regulator valve, the other signal corresponding to shorter term changes in intake air flow conditions in the intake air duct of the engine to augment or oppose the primary signal, depending upon instantaneous intake air flow conditions.

Abstract: A system for use of gas, like LPG, as secondary fuel in diesel engines is concerned. Normally aspirated and pressure charged engines with exhaust gas driven charging, with End-speed or All-speed governors or with common-rail-fuel injection systems are all included.A signal (24,25) proportional to the momentary effective fuel consumption controls the gas supply (20) to the engine (1). A valve (19) in the gas supply (18) is connected to the control lever (16) of the engine governor (12) to allow gas supply only in a load range above approximately 25% and up to a maximum of approximately 40% of the full load total fuel consumption. In the lower load range uncomplete combustion of the gas thus is avoided, in the higher load range both detonation and overload are avoided and the opacity of the exhaust is improved. The consumption of liquid fuel is reduced and the exhaust gas composition is improved.

Abstract: A process for controlling the supply of gaseous secondary fuel to the intake air stream of an I.C. engine normally supplied with liquid primary fuel includes the steps of supplying the gaseous secondary fuel to the engine air intake stream according to a desired air-to-fuel ratio during normal engine operation by utilizing a movable air flow responsive member in the path of the air intake stream to control the position of a gas valve in the gas fuel supply system, and effecting closure of the gas valve as the engine speed controller approaches its idle or off position without positively moving the air flow responsive member. The flow of secondary gas fuel to the engine is thus reduced or stopped without altering the position of the air flow responsive member which continues to move in response to intake air flow. The gaseous fuel, if supplied to a supercharged liquid fuel burning engine, is pressurized by the supercharger system upstream of the engine intake air ports.

Abstract: A fuel control system for use in supplying gaseous fuel from a high pressure source to an internal combustion engine which has an air/fuel intake through which air and gaseous fuel is supplied to the engine and an air/fuel intake manifold in which variations in the vacuum are indicative of engine loading conditions. The system comprises; a pressure regulator, a flow control valve, a control for measuring the speed of the engine, a modulator for modulating the fuel supply and a pressure control device communicating with said pressure regulator to increase or decrease the pressure in the gaseous fuel output in response to the receipt of a signal from the modulator. The pressure regulator receives pressurized gaseous fuel from the source and serves to maintain a constant pressure in the discharging fuel for a given engine speed regardless of flow rate and to increase or decrease the pressure in the discharging gaseous fuel in response to an increase or decrease in engine speed.

Abstract: A system is described for improving performance of spark ignition, internal combustion engines using fuels such as liquified petroleum gas (LP-gas), which have conventionally been stored as a liquid and delivered to the engine as a vapor. This system stores such fuels as liquids (10) and delivers the fuel to the engine inlet air stream as a liquid. The absorption of heat by the vaporizing fuel lowers engine inlet air temperature, increasing its density and permitting more fuel to be burned in each cycle. Vaporizing heat in a pilot line (17) provides the cooling to the liquid fuel in the main fuel line (20) and provides fuel to maintain the engine idling. A member (27) slides within a fuel delivery chamber (25) for covering or uncovering a series of orifices (26) through which the liquid fuel passes into the inlet air stream of the engine.

Abstract: A supplemental fuel system for a combustion engine has a primary fuel supply feeding the combustion chamber directly and a supplemental fuel supply which feeds into the combustion air intake. The supply of primary fuel is appropriately reduced or regulated by automatic control and the supply of the supplemental fuel is continuously automatically adjusted to the supply of primary fuel. Initially the supplemental fuel in vapor state is introduced into the air intake until the heat exchange vaporizer system warms up, when there is an automatic shift to the liquid state of supplemental fuel. A temperature compensator in the air intake connected to the supplemental fuel supply holds the temperature of the supplemental fuel at the same temperature as the air with which it is mixed before passing to the final metering orifice and then to the combustion chamber.

Abstract: The invention relates to a metering device for gaseous propellant for internal combustion engines. The invention resides in the device comprising a slit means (40) through which the gas flows, and a means (45, 47, 49 or 45, 47, 68, respectively) for covering at least one slit (42, 53) in dependence upon another flowing medium (28), for example, the air quantity taken in by an internal combustion engine, said means comprising a foil (47) pressed against the slit edges and rigidly secured at its end adjacent one end of the slits (42, 53) to said slit means (40), with a member (49, 68, respectively) which counteracts the bearing pressure engaging the other portion of said foil located adjacent the other slit end, further comprising in the area of the slits (42, 53) a member (45) which acts in the same direction as the bearing pressure, causes the foil (47) to bear against the slit edges and is displaceable in dependence upon the flow of the other medium (28) along the slits (42, 53).

Abstract: A diesel engine is designed to burn on a mixture of liquid fuel or diesel, and liquefied petroleum gas, or gas. The diesel is injected into the cylinders as is conventional on diesel engines. The gas is mixed into the intake air. The output of the governor connects to a diesel control and a gas control. As more fuel is consumed, both the amount of diesel and the amount of gas is increased; however, the amount of gas is increased at a much faster rate than the amount of diesel is increased. At no load, the engine operates on about 76 percent diesel and 24 percent gas. At 100 percent load, the engine operates on about 80 percent gas and 20 percent diesel. A special gas valve is used.

Abstract: In a gaseous fuel carburetion system in which air and gaseous fuel are mixed in a mixer prior to induction into an internal combustion engine, and in which the rate of flow of the induction air is controlled by throttling the intake of the air/fuel mixture, and in which gaseous fuel is supplied to the system from a pressurized source, an improved method and apparatus for regulating the supply of gaseous fuel to the air/fuel mixer is provided. The method comprises the steps of; sensing at least one operating parameter of the engine which is a function of the induction air flow rate and generating a control signal which varies in response to changes in the induction air flow rate, controlling the rate of flow of the gaseous fuel from the source to the mixer by means of said control signal whereby the rate of flow of the gaseous fuel varies in response to the sensed changes in the parameters related to the air flow rate.

Abstract: A liquid and supplemental gas fuel supply system for an I.C. engine, and in particular a diesel cycle engine, includes a gas fuel control valve that meters supplemental gas fuel into the engine intake air stream in response to engine air flow using a direct air flow responsive member to control a gas valve through a lost motion connection. The position of the gas valve is moreover controllable by a separate throttle position responsive control system that moves the gas valve towards closed position as the throttle approaches the closed or idle position, and holds the gas valve closed until the throttle has moved away from the closed or idle position. The separate control motion of the gas valve is independent from the motion of the air flow responsive member and does not restrict or interfere with the movement of the latter.

Abstract: For the feeding of gas to a vehicle motor, a reservoir of liquefied petroleum gas (100) is used in stages of pressure reduction (I to V). The final stage (V) in the intake conduit (T). The outlet stages (IV) and (V) comprising a plurality of pressure reducers (A.sub.1 . . . A.sub.i, respectively B.sub.1 . . . B.sub.i) with non-loaded diaphragm and operating at quasi nil excess pressure and, at starting up and slowing down, in transitory alternating working conditions with oscillatory motion of the diaphragms.Preferably, the pressure reducers of the outlet stages (IV and V) are arranged in space in accordance with the faces of a regular polyhedron.

Abstract: A control system is provided for regulating the fuel feed to a dual fuel internal combustion engine. The engine includes a source of first fuel, a pump therefor, and a source of second fuel under a predetermined pressure. A first valve is mounted within a first feed line connecting the engine to the pump outlet. A second valve is mounted within a second feed line connecting the engine to the pump outlet. A third valve is mounted within a third feed line connecting the engine to the second fuel source. A pressure-sensitive metering valve is disposed within the third feed line downstream of the third valve. A means is provided which transmits the flow pressure from the second valve to the metering valve and thus, determines the setting of the latter. A control means, adjustable between two modes, is operatively connected to the first, second, and third valves.

Abstract: A system and method for mixing gaseous fuel with air prior to combustion in an internal combustion engine. The system includes an L-shaped channel with a cap mounted to one end and an inlet formed at the other end. A plurality of holes is formed in the L-shaped channel. The channel is mounted to the air intake system of the internal combustion engine upstream from the air filter such that a partial vacuum is created in the vicinity of the holes as the incoming air flows past the channel. The channel includes means for regulating the flow of gaseous fuel through the channel.

Abstract: A propane supply unit for use with gasoline powered automotive internal combustion engines to replace the liquid fuel. The unit consists of a plurality of circular or otherwise formed tubular elements supplied with gas from a common manifold located within the air cleaner housing. The tubular elements are spaced so as to divide up the air flow. Openings in the elements are located as to face the spaces between the elements and discharge the gaseous fuel into the separate streams of air. The unit does not alter the normal air flow conditions so that no modification of the existing engine control system is required when the supply unit is used.

Abstract: Apparatus for enabling an engine to burn either liquid fuel or gaseous fuel, and which includes a gaseous fuel control valve for location in a gaseous fuel supply line between a gaseous fuel storage container and an intake manifold of the engine. The control valve includes a single diaphragm which defines one wall of a chamber having a gas inlet and a gas outlet. An accelerator pedal controlled outlet valve obturator is positioned in the outlet, for controlling the intensity of suction applied to the chamber in response to the position of the accelerator pedal. An inlet valve obturator is provided to control the flow of gaseous fuel through the inlet into the chamber. The inlet valve obturator is connected to the diaphragm so that movement of the diaphragm controls of the inlet valve obturator.

Abstract: An engine combustion system is provided wherein fuel is supplied to the engine combustion chamber in the form of a hot vapor. The system preferably includes a preburner wherein a portion of a liquid fuel supply is burned internally to provide a hot, gaseous admixture of gasified fuel and products of combustion. A portion of the output of the preburner is used to heat air induced into the intake manifold, the heated air being thence supplied to the combustion chamber. The output of the preburner can also be used in auxiliary units such as a heating system for the passenger compartment. For a piston-type engine, the gaseous fuel is released into the combustion chamber formed by the clearance volume above the piston at the top center position of the piston, air being compressed within a recess in the cylinder during the cylinder head and rushing past the fuel inlet upon the downstroke of the piston to provide thorough mixing and, hence, complete burning of the gaseous fuel.

Abstract: A large, two-cycle, port-scavenging gas engine commonly used for oil field pumping operations includes a mixing section at the intake of the scavenging chamber. Fuel gas flows through a supply line directly into this mixing section in a continuous manner controlled only by a governor valve at the gas inflow line. In contrast, the air intake fluctuates cyclically as the engine piston reciprocates. The present invention is a fuel regulator for such an engine which is a gas inflow control such as found in certain types of carburetors. Thus, the maximum gas inflow is regulated by the governor valve at the inflow line, but the fuel regulator of the gas inflow control restricts the fuel gas inflow to an amount proportional to the air inflow as the air inflow fluctuates.