Abstract: A diesel engine hydraulically-actuated, electronically-controlled unit injector fuel injection system is provided with a two-stage pump system including two parallel pumps for supplying actuating fluid to the injectors. The first stage pump of this two-stage pump has a capacity which is adequate for most operating modes. The second stage pump is used for starting and for high engine load situations. The second stage pump is controlled by a solenoid bypass valve that switches in the second stage pump when the pressure in the high pressure rails fall below a desired or programmed level. An embodiment of this invention includes a second bypass circuit having a fast-response, solenoid-actuated bypass valve that bypasses all of the flow from both stages between injections and thereby produces a pulsed flow of actuation fluid to produce the required pressure for each engine fuel injection while unloading the pumping system between injections.

Abstract: A fuel delivery system for removing air from fuel delivered to an engine, and particularly a diesel engine, includes an engine, a primary water separation filter, and a secondary air separation filter. The air separation filter is located downstream from the water separation filter for delivering substantially gas-free fuel to the engine. The air separation filter includes a vessel, a fuel inlet into the vessel, a fuel outlet leading to the engine, a fuel return discharge leading to the fuel tank, and a filter cartridge including filter media presenting numerous small openings therein for permitting the passage of fuel therethrough but screening out bubbles entrapped in the fuel. As the bubbles are trapped on the screen, they float upward to the fuel level and then spill over the upper margin of an upright tube within the vessel leading to the fuel return discharge and then to the fuel tank so that only substantially gas-free fuel is delivered to the engine.

Abstract: This invention has an object to provide a fuel pressurizing apparatus which is light, compact, durable and inexpensive whereby a working machine can be operated even on a slope without difficulty. In order to achieve this object, a pressure adjusting chamber is formed in a portion of a passage in a breather device of an engine, and a pipe conduit is provided to communicate the pressure adjusting chamber with a fuel tank. A check valve which does not allow fuel from the fuel tank to pass is provided in a portion of this pipe conduit. A vent hole which is constantly open is provided in the fuel tank, and a cross-sectional area of the vent hole is set to maintain balance of a pressure from the pressure adjusting chamber with a pressure required for the fuel tank. A space is formed in an upper portion of the fuel tank so as to project therefrom.

Abstract: A diesel engine system in which fuel in a fuel tank having an air space above a fuel level is pumped to a fuel injection system disposed in spaced relation above the fuel tank, and excess fuel is returned to the fuel tank air space via an uninterrupted fluid flow path between the injection system and the air space of the fuel tank. The fluid flow path has a cross sectional area selected such that air from the fuel tank air space flows counter to fuel returning to the fuel tank by gravity during non-operation of the diesel engine, to maintain the space vacated by returning fuel near atmospheric pressure.

Abstract: A fuel tank and filler system for an internal combustion engine includes a fuel tank, a filler pipe extending into the fuel tank, and a check valve comprising a collapsible, normally open tube secured around the outlet of the fuel filler pipe within the tank. Fuel entering the tank passes through the filler pipe and collapsible tube unimpeded. The collapsible tube has sufficient flexibility, however, to collapse upon itself in the event that fuel begins to flow outwardly through the filler pipe, thereby preventing fuel from leaving the tank through the filler pipe.

Abstract: The present invention discloses a method for identifying the concentration of fuels or gases in air, particularly in the intake of motor vehicle motors, with ultrasound measurement, comprising the steps of conducting an air/vapor mixture whose concentration is to be identified through an ultrasound measuring section of known length, directing ultrasound through the mixture in the measuring section, determining the speed of sound through the air/vapor mixture; and identifying the concentration of the mixture on the basis of the speed of sound through the mixture in the measuring section.

Abstract: A two-stage fuel delivery system for an internal combustion engine that includes a first stage pump having a first pump chamber with an inlet coupled to a fuel source, an outlet and a diaphragm responsive to pressure pulsations from the engine crankcase for reciprocation within the chamber. A second stage pump includes a second pump chamber having an inlet coupled to the outlet of the first chamber, an outlet for delivering fuel under pressure to engine fuel injectors or the like, a permanent magnet for mounting on the flywheel of the engine for rotation in synchronism with operation of the engine, and a diaphragm in the second chamber operatively coupled to the magnet for reciprocation with the second chamber responsive to rotation of the magnet to pump fuel from the inlet to the outlet of the second chamber.

Abstract: A fuel pressure pulsation dampener valve is disclosed as having a housing with an internal chamber into which inlet and outlet tubes communicate to transfer fuel under pressure to the fuel injectors of an internal combustion engine. The outlet tube of the valve includes a plurality of ports which are positioned in the valve below the normal operating fuel level of the engine while the opening from the inlet tube through which fuel is supplied to the interior of the valve is positioned above such fuel level. A bleed orifice above the inlet tube opening communicates the interior of the valve to the return line of the fuel system.

Abstract: A homogenizing fuel delivery system is provided for drawing fuel substantially equally from each layer of fuel in a vehicle fuel tank, and delivering this fuel to the vehicle's engine. In this manner, the composition of the fuel delivered to the engine approximates the average composition of fuel in the fuel tank.

Abstract: An improved glow-plug engine for use with a model airplane of the type that includes an output shaft for driving a propeller, a needle valve for controlling a flow of fuel into a carburetor, and a fuel line formed from resilient silicone rubber is provided, wherein the improvement comprises a pinch valve for controlling the flow of fuel through the fuel line which is located farther away from the propeller than the needle valve so that the fuel flow may be adjusted by the fingers of the engine's operator more safely. The pinch valve includes a valve body for securing a section of the resilient fuel line, and a pinching mechanism including a control member that is accurately extendible toward and retractable from a secured section of the fuel line to constrict or expand the fuel flow path defined by the secured section of the fuel line. In one embodiment, control member is a cam mounted on a lever which in turn is linked to a servo-mechanism.

Abstract: An arrangement for supplying fuel from a supply container to an internal combustion engine of a motor vehicle, has a supply tank having an interior with a separate chamber, a supply aggregate having a suction side connected with the supply tank and a pressure side connectable with the internal combustion engine, the supply aggregate receiving fuel from the separate chamber of the supply tank, a branching conduit connected with the pressure side of the supply aggregate and having a portion extending near a bottom of the supply tank, an ejector arranged in the portion of the branching conduit and having a pressure pipe opening in the chamber of the supply tank, and a check valve provided in the branching conduit upstream of the ejector as considered in a flow direction of fuel, and opening in the branching conduit after a predetermined limiting pressure has been exceeded.

Abstract: A flow divider (20) is located between a first fuel return line (18), leading from an engine to the flow divider (20), a second fuel return line (22) leading from a first flow divider outlet (46) to a first tank (A), and a third fuel return conduit (24) leading from a second flow divider outlet (48) to a second tank (B). Returned fuel enters the flow divider inlet (34) and flows into an inlet chamber (54). The fuel flows from the inlet chamber (54) through first and second orifices (50, 52). The first orifice (50) is in flow alignment with a first outlet (42). The second orifice (52) is in flow alignment with a second outlet (44). A first closure member (86) is located in a first outlet opening (104) and a second closure member (88) is located in a second outlet opening (106). The closure members (86, 88) are connected to a common member (90). A spring (82) normally biases the closure members (86, 88) towards the orifices (50, 52).

Abstract: A fuel consumption measuring device is provided with a flow meter which is mounted on a fuel feeding passage extending from a fuel tank to an engine, wherein a return fuel which is not consumed by the engine is returned to a passage in the downstream of the flow meter through a return passage so as to measure a fuel consumption in the engine by the flow meter. The fuel feeding passage is provided with a pressure reducing valve for maintaining a confluence of the fuel feeding passage and the return passage at atmospheric pressure. Therefore, the fuel consumption measuring device has high measuring accuracy and high security, and is suitable for a vehicle.

Abstract: A reservoir in which fluid entering the reservoir is mixed with fluid already present in the reservoir is provided. The mixed fluid is then drawn from the reservoir in such a manner that the fluid drawn from the reservoir has a composition which closely approximates the average composition of the fluid in the reservoir. In this manner, the rate of composition change of fluid released from the reservoir is less than the rate of compositional change of fluid entering the reservoir.

Abstract: The invention relates to a device in a fuel system for an internal combustion engine (1) with a fuel injection device. The fuel system comprises a fuel tank (2), a feeder line (3) for feeding fuel from the fuel tank (2) to the fuel injection device (4, 6, 7), return line (5) for returning excess fuel from the fuel injection device to the fuel tank. According to the invention, a coupling (11) is arranged in the feeder line (3) in the vicinity of its end in the fuel tank (2). The coupling (11) has two open connections for the feeder line (3) with free through-flow for the fuel and a pressure medium connection which is closed during normal operation, through which connection pressure medium can be introduced to force the fuel from the fuel system. A check valve is arranged in the feeder line (3) between the coupling (11) and the end of the feeder line (3) in the fuel tank (2), said check valve permitting flow in the feeder line (3) only in the direction from the fuel tank (2).

Abstract: A vehicle fuel system for a vehicle which has a fuel tank remote from the engine of the vehicle and a fuel pump remote from said tank and a canister in said tank to receive return fuel from a pressure regulator in said system. A fuel flow passage carries fuel from the main fuel tank to the pump. Under conditions of low fuel in the main fuel tank, a valve associated with the canister opens in response to side swerving motion of the vehicle to allow flow of fuel from the canister to the fuel flow passage leading to the pump to prevent starving of the engine due to low flow from the main tank.

Abstract: A control apparatus for an alcohol engine of a vehicle, the engine having an auxiliary equipment and using a fuel containing alcohol, comprising: an alcohol concentration sensor for outputting a detection signal corresponding to an alcohol concentration of the fuel; alcohol concentration calculating means responsive to said detection signal for calculating said alcohol concentration; determining means responsive to said alcohol concentration for computing an optimum condition to operate the auxiliary equipment; and driving means responsive to said optimum condition for driving the auxiliary equipment.

Abstract: An apparatus comprising a fuel pump, an internal combustion engine having an oil pressure and including an engine block and a crankshaft rotatably supported by the engine block, the apparatus further comprising structure for providing a first electrical signal while the engine is running, a starter selectively operable to rotate the crankshaft, structure for providing a second electrical signal while the starter rotates the crankshaft, and structure for causing the fuel pump to supply fuel to the internal combustion engine only while at least one of the first and second signals is present and without regard to the oil pressure of the internal combustion engine.

Abstract: The control apparatus has a fuel injection pump, into which suction chamber fuel is fed by a feed pump that aspirates from a tank. A reversing valve is included in the connecting lines between the tank and the fuel injection pump, and by means of this valve, to turn off the engine, the line connections can be changed such that the suction chamber communicates with the feed side of the feed pump and the compression side of the feed pump communicates with the tank. The reversing valve is embodied as a two-position multiposition valve and has an electromagnet, disposed, partly spray-coated, in the valve housing, which is of plastic, of the multiposition valve. A valve member can be displaced counter to the force of a restoring spring by the electromagnet; the valve member acts upon one ball at a time, serving as a closing body, of double seat valves disposed on both sides of the valve member.

Abstract: A fuel system for a diesel truck has a first fuel tank (80) and a second fuel tank (82). A siphon line (90) is open to the lower portions of the tanks and extends above the upper portions of both tanks. A manually operated priming pump (98) is used to remove air from the siphon line. Fuel is delivered from the first tank to the engine of the truck through a fluid delivery line (84). As fuel is drawn from the first tank, the fuel levels in the tanks equalize as the result of flow through the siphon line. Fuel not consumed by the engine is returned through an overflow line (86). The returning fuel is warmed as a result absorbing energy during pumping and having been in close proximity to the engine. A three-way control valve (88) directs the warm returning fuel to either the first or second fuel tank in response to the temperature sensed by a temperature sensor (94).

Abstract: A fuel management system for reducing pollution when an internal combustion engine is at idle includes a flow control valve located between the fuel tank and the float bowl of the carburetor to reduce the amount of fuel entering the carburetor. A pump is also provided between the fuel tank and the float bowl for removing the existing fuel from the float bowl and conveying it back to the fuel tank when the engine is at idle. The flow control valve in its reduced flow state and the pump are inactivated until the engine reaches a predetermined pressure at which time the existing fuel would be removed by the pump from the float bowl and the flow control valve would permit only a reduced flow of fuel to be conveyed to the float bowl sufficient to keep the engine running.

Abstract: A fuel delivery system that includes a fuel pump having an inlet for drawing fuel from a fuel supply and an outlet connected to a fuel filter so that fuel delivered to the engine by the pump flows through the filter. A check valve is positioned between the filter outlet and the fuel line to the engine so as to prevent reverse flow of fuel from the engine to the supply when the pump is shut down. A pressure reference inlet connected to the outlet side of the fuel filter on the downsream side of the check valve. The outlet of the pressure regulator is connected to return fuel to the fuel supply bypassing the filter as a function of fuel pressure at the filter so as to maintain substantially constant fuel pressure delivery to the engine. The reference input to the pressure regulator is connected to the engine fuel line. Any fuel pressure increase at the engine and in the fuel line due to heat or the like automatically opens the regulator so as to vent the pump outlet to the supply.

Abstract: An automotive fuel system including a reservoir in a fuel tank of the vehicle and a fuel pump in the reservoir. Surplus fuel from a fuel injection system is returned to and confined in the reservoir. An inside screen is disposed between an inlet of the fuel pump and an inlet port from the fuel tank into the reservoir. The inside screen has a porous wall permeable to liquid fuel and impermeable to vapor when partially submerged in liquid fuel. An outside screen surrounds the inlet port in the fuel tank and has a porous wall permeable to liquid fuel and impermeable to vapor when partially submerged in liquid fuel. The porous wall of the inside and outside screens cooperate in sustaining suction at the fuel pump inlet when the reservoir is depleted.

Abstract: A multi-tank fuel storage system is provided for a generator unit which can be mounted to a container in a clip-on fashion and/or mouned to a chassis supporting the container in an underslung fashion. The preferred multi-tank fuel storage system includes: a first fuel storage tank built into the generator unit housing; a separate auxiliary fuel storage tank; a feed line and pump coupling the tanks for transferring fuel from the auxiliary tank to the first fuel storage tank; an overflow line coupling the tanks for transferring overflow from the first fuel storage tank to the auxiliary fuel storage tank; and conduits for coupling the first fuel storage tank to the engine of the generator unit. Quick disconnect couplings are placed in the feed line and the overflow line so that the auxiliary tank can be uncoupled from the system.

Abstract: A fuel control solenoid valve for metering fuel flow through a low pressure fuel injection system of an internal combustion system is provided. The low pressure fuel injection system including the fuel flow solenoid valve is especially suitable for use in providing fuel to a two-cycle internal combustion engine, particularly those that are suitable for use as marine outboard motors. The fuel control solenoid valve includes a non-magnetic spacer which substantially prevents the development of engine surging as peak power conditions are approached or reached.

Abstract: In an ejector pump provided within a saddle-shaped fuel tank for an automotive vehicle to feed fuel from a subchamber to a main chamber through a suction pipe due to a vacuum generated by fuel returned from an engine to the fuel tank via a return pipe, the ejector pump comprises a return pipe connecting portion connected to the return pipe; a suction pipe connecting portion connected to the suction pipe; a nozzle formed at an end of the return pipe connecting portion; a pump housing coupled to the two pipe connecting portions, for forming a vacuum chamber and a throat portion; and in particular elastic reverse-conical shaped check valve provided within the return pipe connecting portion to prevent fuel from flowing reversely from the fuel tank in case of trouble. Further, since the check valve can be used in common with a sealing member and further with the nozzle, it is possible to simplify the ejector pump structure and assembly work without reducing the fuel tank capacity.

Abstract: The invention provides a fuel feed system for an internal combustion engine, the system including a vapor separator having a wall defining a fuel chamber adapted to contain a supply of fuel and having therein an inlet, an outlet and a fuel vapor outlet, and a float drive for affording communication between the fuel vapor outlet and the chamber when the supply of fuel is below a predetermined level, the float valve including a spring engaged with a valve member for applying constant force to the valve member when the valve is closed.

Abstract: An improved pressure regulator for use with automotive engine fuel pumps wherein the ball is constrained for motion in a cage within the inlet chamber. The cage is made up of three simple cylindrical pins press fitted into an end cap. The inlet chamber is oversized with respect to the maximum dimensions of the caged ball array. In this manner, upon opening of the ball off of its seat, virtually no impediment to full flow of the maximum fuel pump capacity through the regulator is achieved.

Abstract: A vapor separator assembly for an internal combustion engine includes a bowl member and a cover member. A fuel pump is located in the internal cavity of the bowl member and has its inlet located in the lower portion of the bowl member cavity, for supplying fuel thereto. The fuel pump is secured in position within the bowl member by engagement of the cover member with the fuel pump. The cover member includes a mounting portion for mounting a water separating filter element to the vapor separator assembly. The cover member includes structure for routing fuel from the discharge of the water separating filter element to the interior of the bowl member internal cavity. A compact arrangement is thus provided for the vapor separator, the fuel pump and the water separating filter, eliminating a number of hose connections between such components as well as facilitating assembly to the engine.

Abstract: A fuel system for a diesel engine includes an air purging system for venting trapped air to a vent line connected to a fuel tank and an emergency shut-down system for providing a fail-safe shut-down of the engine when fuel is low. The air-purging system comprises a device defining a float chamber having an air outlet communicating with the vent line, a fuel inlet, and a fuel outlet. A float is disposed in the chamber and is adapted to move between a normal first position closing the air outlet, an emergency intermediate second position opening both the air and fuel outlets, and a shut-down third position opening the air outlet and closing the fuel outlet. The emergency shut-down system includes electronic and pressure sensitive switches, warning lights, and an auxiliary fuel pump to monitor and control the shut-down and restart modes of engine operation. The air purging system is adapted to function independently of the emergency shut-down system.

Abstract: A low pressure fuel supply system supplies fuel which tends partially to solidify at low temperatures and whose viscosity increases with decreasing temperature, from a fuel tank along a supply line, through a filter, to a fuel injection pump. A fuel recirculating circuit for recirculating fuel warmed by the injection pump extends from a return outlet of the injection pump, along a path extending through the filter to the injection pump inlet. A permanent bleed pipe extends to the fuel tank from the portion of the recirculating circuit between the injection pump return outlet and the filter. The flow-resistance-determining dimensions of the permanent bleed pipe are such that the pipe presents increasing resistance to the flow of fuel therein with decreasing fuel temperature. It therefore carries little flow at low temperatures of the fuel therein, most of the warmed fuel from the injection pump return outlet being directed into the filter.

Abstract: An arrangement for feeding of fuel to an internal combustion engine of a power vehicle comprises a supply tank having a tank bottom, a feeding aggregate arranged in the supply tank, a receiving part holding the feeding aggregate, a holder mounted on the tank bottom, and vibration damping unit through which the receiving part is connected with the holding ring, the vibration damping unit including a metal spring and a rubber elastic buffer through which the metal spring is mounted on at least one of the receiving part and the holder.

Abstract: A projection is provided in a fuel tank for dividing the fuel tank into two tubs. A supporting member is secured on a top of the projection. A fuel pump and a fuel metering device are securely mounted on the supporting member. A service hole is formed in the wall of the fuel tank opposite to the supporting member for inspecting the fuel pump.

Abstract: A fuel supply system for an outboard motor including a combined fuel filter and fuel pump supported within the power head of the outboard motor for drawing fuel from a remotely positioned fuel tank and delivering it to the charge forming device of the outboard motor.

Abstract: Warmed returned fuel from a vehicle fuel injection system is returned only a segregating canister in the tank, and pumped back therefrom preferentially, with make up fuel allowed in only as needed. Overall heating of the stored fuel, and consequent running losses, are substantially reduced, with no ill effects on vehicle operation.

Abstract: A fuel reservoir comprises a tank having a base wall and side walls. In order to minimize the accumulation of water in the tank two pick-up pipes, are provided which are connected together to an outlet pipe. The first pick-up pipe extends to adjacent the base wall of the tank and the second pick-up pipe to some distance above the base wall. In use fuel and water will be drawn through the outlet pipe and in the event that the water in the tank freezes fuel can be drawn through the second pick-up pipe.

Abstract: An arrangement for supplying fuel from a supply tank to an internal combustion engine of a power vehicle comprises a supply aggregate arranged to be located in a supply tank and a supply pump provided with a suction opening, a suction chamber having a first opening communicating with an interior of the tank and a second opening, a storage chamber supplied from fuel return conduit extending from the internal combustion engine and communicating with the suction chamber through the second opening, a blocking member arranged in the suction chamber and forming a valve with a limiting structure of the second opening, the valve closing the second opening until the suction opening formed in the suction chamber is immersed in fuel which flows from the tank into the suction chamber, the blocking member being arranged in a fuel suction stream and held from the latter on an abutment facing toward the suction chamber, whereby it releases the first opening, the blocking member in the event of an interruption in the fuel su

Abstract: This invention relates generally to fuel control systems for combustion engines such as gas turbines used in helicopters and the like, and more specifically relates to a fuel control transfer system which permits the substitution of one fuel control device for another which is supplying fuel to an operating combustion engine, without interruption of, or adverse effect on continued operation of the engine.

Abstract: In a fuel delivery system that includes a pump for supplying fuel under pressure from a supply to an internal combustion engine, a check valve is positioned between the pump and the engine for preventing back-flow of fuel from the engine to the pump. The valve has a flow passage with a central axis and a valve seat orientated away from the pump. A valve element is positioned within the passage for axial motion against a coil spring as a function of fuel pressure from the pump. The coil spring is captured in compression between the valve element and a guide positioned downstream of the valve element within the flow passage. A stem that extends axially from the valve element is slidably disposed in a central bore in the guide. An orifice couples the bore to the fluid flow passage. The guide and valve stem thereby not only restrain lateral motion of the valve element within the passage, but also form a piston/cylinder construction that cooperates with the orifice to dampen axial motion of the valve element.

Abstract: A device for eliminating the water present in the diesel oil supplying a diesel engine of a vehicle, comprises a water separating member, means for detecting the passage of a warning threshold by the volume of water separated and an electric pump adapted to drain this water through a non-return valve. Said pump is only energized from the battery of the vehicle during periods of preheating the engine and when the abovesaid warning threshold is exceeded.

Abstract: A fuel injection system for use with internal combustion engines has a module adapted to be remotely positioned away from the internal combustion engine within the engine compartment. The module includes a fuel inlet and return for moving fuel from a fuel source to the module. A second fuel return associated with the first fuel return is adapted to enable fuel to enter from the module to the fuel injectors of the internal combustion engine. The module further includes an electronic mechanism and harness for controlling and distributing fuel to and from the module and injectors.

Abstract: A low pressure fuel system with fuel preheating for an air-compressing, injection internal combustion engine, in which system, a heat exchanger effective at low fuel temperature with a down-stream fine filter is provided in a supply main leading to the high pressure injection pump and a shut-off valve controlled as a function of the fuel temperature is provided in a return main leading away from the high pressure injection pump.

Abstract: In a dashpot for fuel tanks the cover of the intake chamber of the dashpot is dome-shaped and the suction filter is arranged at an interval below the cover. This arrangement prevents gas bubbles also being drawn off via the suction filter together with fuel.

Abstract: A fuel delivery systems for automotive engine and like applications, which comprises a canister for positioning within a fuel tank having a lower end with a fuel opening and an internal wall spaced from such lower end dividing the canister into upper and lower fuel chambers. An electric-motor fuel pump is positioned within the upper chamber and has a fuel inlet, a primary fuel outlet for feeding high-volume fuel under pressure to an engine, and a secondary outlet for likewise supplying fuel under pressure at smaller volume than the primary outlet. A fluid conduit extends through the canister internal wall, and has an inlet end in the lower chamber and an outlet end positioned in the upper chamber. A nozzle couples the secondary pump outlet to the conduit for aspirating fuel through the conduit from the lower chamber to the upper chamber.

Abstract: A fuel delivery system for automotive engine and like applications which comprises a canister for positioning within a fuel tank having a lower end with a fuel opening and an internal wall spaced from such lower end dividing the canister into upper and lower fuel chambers. An electric-motor fuel pump is positioned within the upper chamber, has a fuel inlet coupled to the lower chamber through the canister wall and a primary outlet for feeding fuel under pressure to an engine. A fluid conduit separate from the pump inlet extends through the upper and lower chamber-separating wall, with an inlet end being positioned within the lower chamber and an outlet end being positioned within the upper chamber. A secondary outlet from the pump supplies fuel under pressure through a nozzle to the fluid conduit for aspirating vapor and fuel through the fluid conduit into the upper chamber. Any vapors entrained in the fuel fed to the upper canister chamber are thus permitted to vent through the canister top.

Abstract: Emergency fuel system apparatus includes two emergency fuel tanks, a relatively primary fuel tank or reservoir disposed adjacent to a vehicle in a fuel tank and a secondary fuel reservoir which holds a relatively small amount of fuel, disposed adjacent to a carburetor or to a fuel injection system. The secondary emergency fuel reservoir provides immediate fuel for an engine during the interval between the time when fuel starvation announces that the vehicle has run out of fuel and the time required for fuel to flow from the primary emergency fuel reservoir to the carburetor or fuel injection system.

Abstract: A fuel injection system with controlled injectors for diesel engines includes a system for regulating the temperature of the fuel, including thermostatically-controlled preheating means associated with the fuel supply circuit and electronically-controlled cooling means associated with the fuel recycling circuit.

Abstract: A fuel conditioner unit generally comprising a vertically oriented frame on either side of which are connected first and second filter housings, defining first and second filter chambers, for containing water separating and particle removing filter elements, respectively. An inlet is provided for introducing fuel from outside the unit to the first chamber, where water is separated and directed downwardly. The dewatered fuel is then transferred to the upper portion of the second chamber, where it moves downwardly over the particulate filter and is drawn out of the unit from an outlet port. A drain port is provided for discharging the water that is separated from the fuel in the first chamber. A vent can be provided in the upper portion of the second chamber for removing air that rises from the fuel as the fuel travels downwardly through the second chamber.

Abstract: In a marine fuel system for a fuel injected internal combustion engine, a fitting (50) is provided in the vapor supply line (41). The fitting (50) has a first reduced diameter passage (57) providing a vacuum bleed orifice passage partially venting vacuum from the induction manifold (17) to atmosphere, to limit peak vacuum applied to the vapor separator (33) from the induction manifold (17). The fitting (50) has a second reduced diameter passage (56) providing a flow restrictor passage limiting the volume of flow of fuel vapor from the vapor separator (33) to the induction manifold (17). The fitting (50) limits fuel vapor supplied from the vapor separator (33) to the induction manifold (17) at peak vacuum from the induction manifold (17) during rapid engine deceleration to prevent an overly rich fuel air mixture in the induction manifold (17) otherwise causing rough idling or stalling. The fitting (50) also solves hot restart problems.

Abstract: A marine fuel system includes a first crankcase pressure driven fuel pump (32) supplying fuel from a remote fuel tank (29) to a vapor separator (34), and a second crankcase pressure driven fuel pump (43) supplying vapor free fuel from the vapor separator (34) to the carburetors (18, 30) of the engine. In combination, a squeeze bulb (47) and one-way check valve (48) supply fuel from the remote fuel tank (29) directly to the carburetors (18, 30) for starting the engine.