Excess fuel returned to tank

A fuel control device for internal combustion engines which is located between the fuel pump and carburetor. Consisting of two parts, the first is located adjacent the carburetor inlet and includes a pressure responsive valve to control the fuel pressure from the pump and an overflow outlet to the second...     

A fuel delivery system for an engine operated with a gasoline/alcohol fuel mixture in which a fuel pump delivers fuel from a fuel tank to a fuel feed device on the engine. According to the invention the fuel pump is immersed within the fuel in the fuel tank and a fuel return line is connected to the...     

A carburetor in a fuel system in a motor vehicle including a fuel tank, a fuel pump for delivering fuel from the fuel tank to the carburetor under pressure and the return line which returns fuel from the carburetor to the fuel tank when an excess amount of fuel is delivered to the carburetor by the fuel...     

A fuel supply system for engines, including a fuel tank divided into first and second chambers, a fuel supply passage means including a fuel pump and supplying fuel from the fuel tank to a carburetor of the engine and a fuel return passage means for returning the excess fuel supplied to the carburetor...     

A fuel supply system for engines having a carburetor which has a float chamber and a vapor bleed passage connected to the float chamber, wherein a part of a fuel supply passage means for supplying fuel from a fuel tank to the carburetor traverses through the float chamber so that the fuel flowing through...     

There is disclosed a new and improved air-fuel metering regulator which provides for extremely fine adjustment of the flow of fuel to the internal combustion engine which may be operating under idling, cruising or various accelerating power circumstances. This is provided, in the preferred embodiment,...     

A fuel injection diesel engine is equipped with auxiliary apparatus which utilizes the engine coolant and the coolant temperature control as well as an auxiliary temperature control for preheating the diesel fuel prior to injection to increase fuel efficiency.

A fuel feed system adapted to maintain at a constant value the pressure difference across a fuel measuring gate disposed in a fuel feed passage and control the area of opening of the fuel measuring gate in connection with the amount of air being sucked into an internal combustion engine so as to continuously...     

Fuel for a diesel engine is fed to the engine through a small float tank provided with a fuel heater. A cooling unit is employed to cool overheated fuel recycled from the engine. A temperature controlled valve is utilized to divert recycled fuel from the cooling unit through the float tank and back to...     

An apparatus for supplying fuel to a combustion device has first and second tanks for storing light and heavy fuel, respectively, a third tank connected to the first and second tanks by first and second conduits, respectively, for supplying light and heavy fuel to the third tank, a third conduit connecting...     

A liquid fuel collecting and damming assembly located in a vehicle fuel tank to aid the intake of fuel to the engine by elevating the level of fuel about the fuel inlet particularly when the liquid level in the tank is relatively low. The assembly provides an open-ended cylindrical wall which is supported...     

A diesel engine may have an electrically-actuated cold starting device in its inlet manifold, gravity fed with fuel from a reservoir interposed in a pipe for returning excess fuel from the injectors and injection pump to the vented fuel tank. If the pipe opens below the fuel level in the tank because...     

A blending installation is described in which the grade of fuel is adjusted to enable an engine to use the most economical grade of fuel at any time. A circuit is connected to two reservoirs containing different grades of fuel. The fuel is constantly circulated by a pump in the circuit and fed to the...     

A diesel engine fuel system of the type which includes a fuel heater upstream of a filter in the fuel feed line from the tank to the engine injector and wherein a diverter line is connected at one end in the engine-to-tank return line and at its other end to the feed line downstream of the filter. A...     

Intake fuel supplied to a conditioning tank is mixed therein with engine heated fuel returned from a fuel injector to which mixed fuel from the tank is fed. The mixed fuel in the conditioning tank is degassed by atmospheric venting through a hydrostatic liquid column rising to a level above the conditioning...     

A throttle body fuel injection system has a pressure regulator which reduces the pressure of the fuel supplied to its electromagnetic injector as the engine induction passage pressure decreases.

A liquid fuel injection pump includes a reciprocable pumping plunger located in a bore formed in a pump barrel. The barrel is located in a pump body. The bore has first groove for collecting fuel leaking from the pumping chamber defined by the plunger and bore, a second groove through which lubricating...     

The fuel system of a diesel powered vehicle is kept free of wax blockages during cold weather by a mixing unit which is submerged in the fuel tank and furnishes to the fuel pump a waxing resistant supply stream comprising a warm fraction derived from the excess fuel by-passed by the engine injectors...     

A return line communicates excess fuel from the injectors of a diesel engine to a fuel tank and is connected to a nipple on a filler pipe of the fuel tank. A dam wall is provided inside the pipe over an inlet from the nipple and forms a small reservoir for fuel which can be fed via a T-connection and...     

A cannister type diesel fuel heater that readily bolts on to a conventional diesel tractor comprising a closed container having two separate heat exchanger coil systems within the closed cannister. One coil is adapted to circulate diesel fuel coming from the fuel tank before combustion and the other...     

In association with a vehicle engine, a fuel system including a fuel tank with an inlet pickup for discharging fuel from the tank, pump means to transport fuel from the tank pickup to the engine in a quantity normally in excess of the quantity needed for engine operation at normal operating speeds, and...     

Apparatus for ejecting water from a fuel system having a fuel reservoir with a water trap which is open to a pump in the presence of water and closed in the absence of water. The pump operates each time the engine is started to receive a charge of water and each time the engine is stopped to discharge...     

A fuel injection apparatus in which a closed fuel circuit is pressurized, and the amount of fuel injected is determined by the pressure in the circuit. Air intake by the engine is controlled in response to the amount of fuel injected. The fuel injection apparatus includes a reservoir with a fixed level...     

An in-line fuel reservoir for a high pressure fuel metering system having a high pressure pump for pumping fuel to an engine and a low pressure pump for pumping fuel from a fuel tank to the high pressure pump. The fuel reservoir has a fuel supply chamber, a fuel supply inlet to the fuel supply chamber...     

An apparatus for vaporizing liquid gasoline for use in a carburation system includes a centrifugal pump which pumps liquid gasoline from a tank through a check valve into an inlet of the pump. The rotor of the centrifugal pump is operated at a sufficiently high rate to cause a substantial amount of cavitation...     

A fuel metering apparatus is shown as having a throttle body with an induction passage therethrough and a throttle valve for controlling the flow of air therethrough; associated fuel metering and control apparatus is shown operatively connected to individual fuel injection valve assemblies respectively...     

A fuel rail containing injectors for delivering fuel to an engine has a large passage supplying fuel to the injectors and a small fuel return passage. The injectors are received in sockets each of which has a restricted vent extending to the return passage. The fuel rail is formed by molding or extruding...     

A fuel injection system is proposed which serves to supply fuel to an internal combustion engine. The fuel injection system includes a metering and quantity distributing valve connected with regulating valves, which can be acted upon by the fuel pressure in a differential pressure control line. Communicating...     

A fuel feed system for an automotive type internal combustion engine has a fuel reservoir from which fuel normally is supplied at a constant volume to the inlet side of a high pressure pump from a low pressure supply pump located in a fuel tank; the reservoir contains valving that automatically redirects...     

A fuel system for a compression ignition engine includes a high pressure pump to which fuel is supplied through a filter by a low pressure pump. A fuel heater is provided to supply heat to the fuel. Fuel is returned from the housing of the high pressure pump through a conduit which includes in a valve...     

A fuel system for maintaining fuel flow when the surface of the pool of fuel in the fuel tank is below a minimum level. The fuel pump system includes a reservoir in the fuel tank and a pump in the reservoir. A motor in the pump drives a first pump which draws fuel from a secondary chamber of the pump...     

A fuel injection system is provided with a purging device (14) for purging gas, including air and vapor, from the system. The device includes a pressure responsive valve (22) permitting gas to flow from an inlet (16) connected to the high pressure fuel injection line (8) to a vent outlet (18), and blocking...     

In a vehicle fuel tank, a fuel handling apparatus including a fuel pump supported by a fuel delivery conduit, a fuel return conduit and an elongated fuel collector. The collector is pivoted with respect to the pump and the fuel return conduit between a compact installation position to an expanded installed...     

The present invention relates to a filtering fuel collector arranged inside a fuel tank to provide a running reserve fuel supply for a combustion engine when subjected to considerable g forces or while inclined. A running fuel reserve is obtained by making the fuel collector out of a porous, dimensionally...     

A fuel system for internal combustion engines which includes a fuel reservoir canister containing an electric fuel pump mounted in a fuel tank. A diaphragm-controlled valve isolates the reserve fuel from the pump inlet under normal operating conditions but a low fuel level will cause the valve to open...     

A fuel pumping apparatus for supplying fuel to a compression ignition engine includes a high pressure pump to which fuel is supplied by a low pressure pump by way of a throttle which is responsive to the output pressure of the low pressure pump for the purpose of providing a governing action. A valve...     

A fuel delivery system (10) includes a fuel tank (12) for storing a supply of fuel (16) and conduits (18) for conducting the fuel (16) from the fuel tank (12) to an engine (20). A separator module (22) in fluid communication with the conduits (18) separates by cross-flow separation a substantially water...     

A fuel supply system including a fuel tank, a feed conduit through which fuel is pumped from the fuel tank, and a return conduit through which excess fuel is returned to the fuel tank. The fuel tank has first and second sumps. The system comprises an ejector pump having a pressure chamber opening through...     

A bottom wall of a fuel tank body defines an inwardly extending projection which separates at least a lower segment of an interior of the fuel tank body into a first fuel chamber and a second fuel chamber. Fuel is pumped out of the first fuel chamber. A portion of the fuel pumped out of the first fuel...     

A dashpot for fuel tanks is designed such that gas bubbles produced in the latter can no longer cause troublesome noises within the fuel tank. This is achieved by means of a gas separation space which is separated from the dashpot intake chamber, into which a fuel return line opens and to the upper wall...     

A plastic fuel tank comprises a large main tank (1) and a small collecting tank connected to the main tank (1) by a flow-through opening (7). The collecting tank (3) is completely pulled into the underside (11) of the main tank (1), and includes vaulted lateral walls (31) which are symmetrical in all...     

In a fuel supply device for vehicles, a sub-tank is arranged within a fuel tank. At least one intake port is provided in a bottom wall of the sub-tank. A check valve is arranged at the intake port. A fuel pump is arranged within the sub-tank to supply fuel from the sub-tank to an engine. A fuel return...     

Herein disclosed is a cooling system for use with an internal combustion engine which is operated on evaporable fuel supplied from a fuel tank. The cooling system comprises a tube extending from the fuel tank to a venturi throat portion of an air induction passage of the engine, an expansion valve connected...     

A fuel tank contains a swirl pot into which a fuel return pipe from the engine is directed and which induces fuel flow from the tank into the pot so that the fuel level in the pot is kept high. Fuel flow into the pot is induced by directing a flow of fuel from the return pipe over a ramp past an opening...     

A filter arrangement disposed within a fuel tank and adapted to prevent vapor lock. The filter arrangement is comprised of a fuel sucking section which is communicated through a connecting pipe section with a fuel pump. The fuel sucking section is provided with a netting member through which fuel in...     

In combination with a diesel engine, an engine air intake conduit leading preferably to a turbocharger, a source of fuel, and a circuitous fuel path supplying fuel to the engine from the source and returning uncombusted fuel from the engine to the source, is a fuel cooler. The fuel cooler is mounted...     

A fuel delivery system for internal combustion engines in which an electric-motor fuel pump supplies fuel under pressure from a tank to a fuel injector carried by the engine, and excess fuel is returned by a pressure regulator from the engine to the supply tank. A restriction is positioned in the fuel...     

A vehicle fuel utilization system for a truck having multiple tanks, an above-tank crossover line coupling the two tanks, a draw line coupled only to a primary tank, and a return line coupled to the crossover line or to either of the tanks separately.

A canister with an electric fuel pump therein is connected to a cover for an access port through which the canister is installed on a fuel tank of an automobile by three hollow struts. Each strut has a first end press fitted into a socket on the cover and is telescopically received in a bore in the canister....     

A vehicle fuel pumping unit wherein a reserve fuel supply container is located within the fuel tank to supply liquid fuel to a motor-operated pump when the tank is nearly empty. The invention addresses the problem of pump starvation when the tank is nearly empty and the liquid fuel is held away from...     

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...     

The invention is related to a fuel purifying apparatus, especially diesel fuel, which consists in a hollow cylindrical body that has a fuel intake orifice and an exit orifice through which the fuel, respectively, enters the apparatus to be purified, and leaves in the direction of the vehicle engine with...     

A system (110) for preheating fuel both in a fuel tank (16) and in a fuel supply line for an internal combustion engine. The system (110) includes a pair of heat exchangers (12 and 112) for transferrinhg heat from a heated fluid to the fuel. The tank heat exchanger (12) includes a fuel tube (32) with...     

A device for inclusion in the line from a fuel reservoir which includes a fuel pump and a carburetor, a device arranged intermediate the carburetor and the fuel pump which includes a main container having an inlet port from an upstream inlet port above the floor level and a downstream outlet port at...     

A fuel supply apparatus for an internal combustion engine disposed in the fuel tank of automotive vehicles including a reservoir container on the tank bottom, a feed conduit through which the fuel is suctioned from the fuel tank 1 a return conduit through which excess fuel returned to the tank from the...     

An in-tank fuel module adapted to be mounted within a fuel tank of predetermined vertical dimension through a circular opening in an upper wall of the tank. The module includes a canister having a one-piece hollow cylindrical external wall of blow-molded plastic construction and of diameter to fit through...     

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...     

A fuel supply system comprising a main tank for storing a fuel; a subtank provided in the main tank for storing a part of the fuel; a first communication line for communicating the main tank to the subtank; a first pump provided in the first communication line for supplying the fuel from the main tank...     

A fuel tank closure component supporting a fuel pump, a fuel level sensor, and fuel line connections to the vehicle engine. The closure component fits into a circular aperture in the top of the tank. The closure component has a metal plate and a plastic connector body. The connector body has two push-fit...     

A modular fuel delivery system including a reservoir in a fuel tank, an electric fuel pump in the reservoir, and a jet pump for pumping fuel from the fuel tank into the reservoir wherein overflow from the reservoir is recirculated by the jet pump back into the reservoir to minimize mixing of potentially...     

An integral fuel line for use in a fuel injection type of fuel distribution system for motor vehicles includes an innermost tube defining a high pressure line, an intermediate tube defining a low pressure line, and an outer tube defining a vapor recovery line. The innermost tube has a first passage for...     

A modular fuel delivery system including a reservoir in fuel tank, an electric high pressure pump in the reservoir fed only from inside the reservoir, and a jet pump fed only from the fuel tank and discharging into the reservoir to keep the latter filled and energized from the high pressure pump. A check...     

An automotive fuel system including a reservoir having upper and lower chambers on opposite sides of a partition in the reservoir, a high pressure fuel pump having an inlet connected to the lower chamber, a low pressure fuel overage return pipe returning overage fuel directly to the lower chamber, and...     

A fuel injection system of an outboard motor is provided with a vapor separator as a fuel tank disposed in the outboard motor and the system includes a fuel return pipe connected to the vapor separator, a fuel supply pipe connected to the vapor separator for supplying fuel to the fuel injector and a...     

An automotive fuel system including a reservoir having upper and lower chambers on opposite sides of a partition in the reservoir, a high pressure fuel pump having an inlet connected to the lower chamber, a low pressure fuel overage return pipe returning overage fuel directly to the lower chamber, and...     

A fuel handling system incorporates a reservoir canister within the fuel tank that is enclosed, but for a float controlled vapor vent valve with a vent orifice of predetermined size. A second stage pump sends fuel to the engine, with unused fuel being returned to the canister through a bubble separator...     

A fuel delivery system for an internal combustion engine that includes a fuel supply with a pump responsive to application of electrical power for supplying fuel under pressure. A fuel injector is coupled to the supply for controlled delivery of fuel from the supply to the engine. A check valve is positioned...     

A multiple pick-up for a fuel pump in a fuel tank which includes an in-tank pump with a combined filter and diaphragm to control flow of fuel to the pump inlet. A first pump base supports the pump and contains the diaphragm and valve for a primary fuel supply. A second valve base with a similar diaphragm...     

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...     

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...     

A fuel system for an internal combustion engine is disclosed having a fuel distributor to which one or more injectors are operably connected for injecting fuel into the intake manifold of the engine. A valve assembly in the system has a valve which is disposed for movement between a first position in...     

An internal combustion engine with a diaphragm carburetor which provides additional fuel injection in all starting and environmental conditions. The carburetor is provided with a fuel recirculation line which communicates at one end with the fuel feed line of the carburetor, and which communicates at...     

A fuel flow arrangement has a fuel feed line (14) for feeding fuel from a tank (10) to an engine (12) with a fuel injection pump (20) by means of a pump (18), and a fuel return line (16) for returning excess fuel from the engine to the tank. A bypass passage (21) with an orifice (22) provides a communication...     

A fuel feeder for an automotive engine, which comprises a fuel tank with a sub-tank provided therein for feeding fuel from the sub-tank to an engine. Excess fuel returned from the engine is led to an overflow chamber disposed in the sub-tank and thence overflows into the sub-tank. Normally, the overflow...     

A fuel system of an internal combustion engine comprises a fuel tank for storing fuel, a fuel injection valve disposed on the internal combustion engine, a fuel supply pipeline connecting between the fuel tank and the fuel injection valve, a fuel pump for supplying the fuel in the fuel tank to the fuel...     

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)...     

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...     

A high pressure fuel hose for disposition between a fluid connector on a fuel pump canister in a fuel reservoir and a fluid connector through the reservoir wall. The fuel hose, located intermediate the fuel delivery system and a check valve at the fuel pump, has a flexible tubular body characterized...     

A dual fuel tank system for a vehicle including a fill limiter tee disposed in the fill limiter line of the main fuel tank through which fuel is transferred from the auxiliary tank to the main tank and fluid can flow between the two tanks.

A fuel pump manifold for a no-return fuel system for an automotive engine. The manifold has inlet and outlet passages with a check valve which opens when fuel is supplied to the engine and closes to prevent reverse flow of fuel when the outlet pressure is greater than the inlet pressure and a vent valve...     

A method of operating a low boiling point liquid fuel injection system for an internal combustion engine (1) wherein the fuel is stored in a tank (17) and has a variable vapour pressure in the tank (17) dependent upon ambient temperature. The method comprises pumping the fuel to the fuel inlet rail (15)...     

The description relates to a fuel tank serving to provide fuel to the internal combustion engine of a motor vehicle. The fuel tank contains a vessel arranged therein, from which vessel a delivery unit pumps fuel to the internal combustion engine of a motor vehicle and in which are arranged a plurality...     

A fuel pressure regulator for a no-return fuel system for an automotive engine with fuel injectors having a housing with a flexible diaphragm between first and second chambers. The second chamber has a fuel inlet receiving fuel from a fuel pump with a spring biased valve therein to admit fuel to the...     

An apparatus for injecting fuel into an engine through fuel injectors connected to a fuel tank through a fuel supply passage having a fuel pump provided therein. The apparatus include a first pressure regulator provided in the fuel supply passage between the fuel pump and the fuel injectors for varying...     

A main fuel tank in an automotive vehicle contains a reservoir in which is located a two-stage electrically operated pump. The first stage is a jet pump which draws fuel from the main tank and delivers it to the reservoir. The second stage is a rotary pump which draws from the reservoir and delivers...     

A fuel delivery system has a fuel pump which draws fuel from a fuel tank to supply pressurized fuel to the fuel metering system of an internal combustion engine, and a conduit connecting the pump intake with an enclosed, pressurizable fuel reservoir for accumulating return fuel therein so as to provide...     

An in-tank fuel pressure regulator having a through-passage member on the moveable wall for controlling the flow of fuel from the inlet to the outlet chambers of the regulator. The through-passage member has a central through-hole in which is positioned a valve seat that mates with a valve closure member...     

A flow-through type fuel pressure regulator having, for its valve element, a sphere laser-welded to the housing end wall of the fuel inlet chamber, and for its valve seat, a coined circular surface circumscribing a through-passage in an annular member at the center of a movable wall (diaphragm) that...     

An engine fuel supply system includes a fuel pumping unit located outside the fuel tank for pumping fuel from the tank to the engine. The pumping unit includes a motor operated fuel pump positioned in a reservoir that is partitioned to form a lower chamber and an upper chamber. The pump inlet is connected...     

A motor-vehicle engine system has an internal-combustion four-cycle engine having a fuel-supply manifold and operable at variable speed with a fuel requirement dependent on speed, a substantially closed but vented fuel tank holding a supply of gasoline, a fuel pump having an input connected to the tank...     

An anti-lock system for preventing vapor lock is disclosed. It has a temperature sensor which controls the vehicle fuel pump to circulate liquid fuel through the majority of the fuel system when the under hood temperature is above a certain level to maintain liquidity at all times and prevent the formation...     

A flow through pressure regulator as may be used in a fuel delivery system for a motor vehicle has a contained, but floating ball valve. The ball valve open and closes a central passageway through the diaphragm of the regulator. The diaphragm divides the interior of the regulator into 2 chambers, both...     

A pressure-limiting valve has a closure member (5) which, in its closed position, rests with initial stress against a valve seat (4) and has, on the side towards the valve seat (4), a shoulder (6) which can be formed by a circumferential flange (7) on the closure member (5). This induces enlargement...     

A fuel handling system for an internal combustion engine having a vapor separator for receiving fuel from a remote tank and a pump for delivering the fuel under high pressure to a fuel injector of the engine while providing vapor separation. The separator has an inlet for receiving fuel from the tank,...     

A power fluid heating system according to this invention includes a heating apparatus positioned within a power fluid container having a first power fluid pickup conduit, a second power fluid pickup conduit positioned within the first power fluid pickup conduit, and a heat exchanger for directly heating...     

An in-tank type fuel pump which can easily be installed and reduces the vibration caused by the fuel pump. The fuel pumped up by a pump part passes through a filter to have foreign matter contained therein removed. Then, the fuel flows from a fuel passage, through an opening part in a cap, into a recessed...     

A liquid propane fuel storage and delivery system for a vehicle engine with a fluid handling component module removably top-mounted on an appropriate vehicle-mounted pressurized liquid propane fuel storage tank. The module includes: (1) a fuel tank 80% stop-fill subsystem that automatically opens and...     

A fuel pump and a fuel filter inside a fuel tank and a pressure regulator are supported by a cover closing for an opening of the fuel tank. The fuel sucked by the fuel pump flows into the fuel filter and flows out to the lower side chamber of a filter housing after being filtered by an element. The fuel...     

A filter system forming part of the fuel system of a compression ignition engine includes a housing which carries a filter element. The housing has a first inlet which opens into a chamber defined between the housing and chamber the first inlet being connected to a fuel tank, and a first outlet for fuel...     

Fuel is pressurized by the expansion and contraction of a pump chamber defined inside a casing according to the rotation of a power input shaft which penetrates from the outside of the casing into its inside. A first seal member is provided between the casing and the power input shaft and prevents escape...