Abstract: A fuel supply device includes a filter device, a pump, a suction pipe, and a bubble removing device. The filter device includes a first filter that filters a fuel, a filter chamber surrounded by the first filter, and a filter opening that is in fluid communication with the filter chamber. The pump has a pump suction port for drawing the fuel from the filter chamber. The suction pipe fluidly connects the filter opening to the pump suction port. The bubble removing device is disposed in at least one of the filter device and the suction pipe. The bubble removing device includes a valve device that is configured to discharge a bubble contained in the fuel to the internal space of the fuel tank, and a foreign matter regulator that is disposed between the valve device and the internal space and that regulates or prevents a foreign matter contained in the fuel from flowing into the fuel supply device.

Abstract: A pump component is removed from a port of a suction-side fluid cavity of a high-pressure fluid pump. The pump component performs a pump function for the high-pressure fluid pump. A primary coupler connects to the port. The pump component connects to the primary coupler. A diverter fluid passage diverts a low-pressure fluid from the primary coupler to an auxiliary fluid delivery system. The primary coupler communicates the low-pressure fluid through the pump component and primary coupler to the port.

Abstract: A compression ignition dual fuel engine supplies natural gas fuel and liquid diesel fuel to each engine cylinder from a common fuel injector. Each fuel injector is fluidly connected to both a liquid fuel common rail and a gaseous fuel common rail. The engine includes a surplus gas system for capturing surplus gas, such as evaporated gas from the gaseous fuel supply and pressure control system, or left over pressurized natural gas produced by engine shut down. Rather than being vented to atmosphere, the surplus gas can be burned in the engine when operating conditions present burn opportunities.

Abstract: A pump component is removed from a port of a suction-side fluid cavity of a high-pressure fluid pump. The pump component performs a pump function for the high-pressure fluid pump. A primary coupler connects to the port. The pump component connects to the primary coupler. A diverter fluid passage diverts a low-pressure fluid from the primary coupler to an auxiliary fluid delivery system. The primary coupler communicates the low-pressure fluid through the pump component and primary coupler to the port.

Abstract: The invention relates to a fuel supply system (1) for injecting liquefied vapour under high pressure, such as liquid petroleum gas (LPG), into a combustion chamber (3-6) of an internal combustion engine (2). The fuel supply system (1) comprises a fuel supply for liquefied vapour connected to a high-pressure pump (11) via a duct. The high-pressure pump (11) has a high-pressure chamber (105) which is embodied thereby to increase the pressure of the liquefied vapour. A high-pressure discharge of the high-pressure pump (11) is connected to a high-pressure rail (7) which comprises one or several injectors for injecting liquefied vapour into a combustion chamber. According to the invention, the fuel supply system is provided with a discharge F unit (20) for purging fuel, in particular fuel vapour, between the high-pressure chamber and the combustion chamber.

Abstract: A fuel supply apparatus according to the present invention includes vapor production determining means for determining whether or not the vapor of the fuel is producible, and control means (ECU) for operating a passage resistance adjusting means of a pressure adjusting mechanism to cause increase of the pressure of the fuel supplied to an injector insomuch as the production of the vapor is inhibited when the vapor production determining means has determined a vapor producible condition.

Abstract: A fuel supply system that includes a fuel pump, a jet pump, a first device and a second device. The fuel pump has a first port, a second port and a third port. Each of the first and second ports is configured to discharge a pressurized fuel. The third port is configured to discharge a fuel vapor that may be produced within the fuel pump. The first port is coupled to an engine via a fuel supply passage. The first device is coupled between the second port and the jet pump and is operable to permit and prevent the supply of the pressurized fuel to the jet pump. The second device is coupled to the third port and is operable to permit and prevent the discharge of the fuel vapor to the outside of the second device.

Abstract: A pump component is removed from a port of a suction-side fluid cavity of a high-pressure fluid pump. The pump component performs a pump function for the high-pressure fluid pump. A primary coupler connects to the port. The pump component connects to the primary coupler. A diverter fluid passage diverts a low-pressure fluid from the primary coupler to an auxiliary fluid delivery system. The primary coupler communicates the low-pressure fluid through the pump component and primary coupler to the port.

Abstract: In a fuel vapor release suppression system for a fuel tank, a main tank and a sub tank communicate with each other, and the sub tank and a canister communicate with each other. When the main tank has a higher temperature, fuel vapor of the main tank is supplied to the sub tank where the fuel vapor is liquefied. When the main tank has a lower temperature, fuel vapor of the sub tank is supplied to the main tank. At this time, low concentration fuel vapor is supplied from the canister to the main tank, thereby accelerating generation of fuel vapor corresponding to sub tank fuel vapor pressure, so that the sub tank fuel vapor pressure decreases. Therefore, liquefaction is accelerated in the sub tank when the main tank temperature increases. Thus, fuel vapor generated in a fuel tank is effectively liquified irrespective of ambient air temperature.

Abstract: Provided is a variable stroke property engine that can prevent an increase in the resistance to the engine owing to the contact between the variable stroke piston mechanism and lubricating oil. In a variable stroke property engine equipped with a variable piston stroke mechanism consisting of a plurality of links 4, 5 and 12, a baffle plate 40 is provided between the links and the oil surface of the lubricating oil received in an oil pan so that the links may be separated from the oil surface by the baffle plate and the lubricating oil is prevented from contacting the links. Thereby, an increase to the resistance to the movement of the links can be avoided.

Abstract: A method and an apparatus for metering a reducing agent in which the reducing agent is delivered, via a line and a final control element that regulates the metering, in particular a metering valve, to a catalytic converter assembly for removing nitrogen oxides from the exhaust gases, in particular of a Diesel engine; a pressure drop in the line dictated especially by gas inclusions is detected, and the line is ventilated via the final control element.

Abstract: In a common rail type fuel injection system, fuel in a fuel tank is sucked by a feed pump and fed to a pressurizing pump. Fuel pressurized in the pressurizing pump is supplied to a common rail. The pressurized fuel accumulated in the common rail is injected into a cylinder of an internal combustion engine from an injector. All of these operations are electronically controlled by an electronic control unit. To gradually suck air in the fuel tank together with fuel and to avoid air accumulation in a fuel filter, a relief valve is connected to the common rail. The relief valve is opened when the engine is idling thereby to increase an amount of fuel sucked by the feed pump and to gradually suck the air together with the fuel. The relief valve is opened only in interval periods in which fuel is not injected from the injector.

Abstract: A ported pressure relief valve (10) used in an automotive fuel system (F) includes an unrestricted constant bleed orifice (32) for routing pressurized fuel from a fuel pump (P) back to a fuel source (T, M) when an engine (E) is running. A check valve (30) prevents flow from a fuel system back to the fuel source when the engine is off, so to retain sufficient pressure in the delivery system that the engine will readily start when cranked. A pressure relief valve (50) drains fuel from the delivery system back to the source of fuel in response to a pressure build up in the fuel delivery system above a predetermined pressure level so to prevent an overpressure condition which would otherwise damage the fuel delivery system.

Abstract: In a fuel injection apparatus in which a pressure regulator is attached to a vapor separator, in order to make the vapor separator compact, to improve corrosion resistance of the pressure regulator and to maintain a stable pressure regulating operation for a long time period, a vapor separator is constituted by a chamber and a cover, a pressure regulator is arranged within a recess portion of the cover and above a fixed fuel liquid surface, the longitudinal axis of the pressure regulator is arranged in a state of being approximately parallel to the fuel liquid surface, a pressure fuel inflow passage is formed in the cover and is formed so as to be branched from a fuel discharge passage formed in the cover, and a vent hole of a spring chamber is open at a lower position in the gravitational direction.

Abstract: In some fuel systems, such as those associated with a diesel engine, most if not all of the air that has leaked or been introduced into the fuel system must be evacuated before the fuel injectors can work properly to start the engine. Because such systems often utilize a pressure regulating valve to maintain the fuel system at some pressure, which is often substantially higher than atmospheric pressure, it can be difficult to evacuate air without first raising the air pressure in the fuel system above that which is required to open the pressure regulating valve. In addition, evacuating air from the fuel system can sometimes involve pushing the air through the fuel injectors in order to evacuate the same to the fuel tank. A quick priming fuel system includes air bleed passages that circumvent both the pressure regulating valve and the fuel injectors so that air can be quickly evacuated from the system at a relatively low pressure.

Abstract: To provide a fuel injection apparatus preferable for a marine engine which can prevent a metal soap from being generated in a motor portion of a high pressure electric pump even when fuel containing sea water is sucked into the electric pump, a high pressure electric pump (HP) is provided with a pump portion (P) and a motor portion with in a pump housing (1), the pump portion (P) sucks fuel within a vapor separator (V), high pressure fuel the pressure of which has been increased by the pump portion (P) is discharged through the periphery of the motor portion, the motor portion of the high pressure electric pump (HP) is formed as a brushless motor portion, and a resin material is molded on the outer periphery of a drive coil (6B) constituting the brushless motor portion, thereby shutting off contact between the drive coil (6B) and the fuel.

Abstract: In a fuel injection apparatus in which a pressure regulator is attached to a vapor separator, in order to make the vapor separator compact, to improve corrosion resistance of the pressure regulator and to maintain a stable pressure regulating operation for a long time period, a vapor separator is constituted by a chamber and a cover, a pressure regulator is arranged within a recess portion of the cover and above a fixed fuel liquid surface, the longitudinal axis of the pressure regulator is arranged in a state of being approximately parallel to the fuel liquid surface, a pressure fuel inflow passage is formed in the cover and is formed so as to be branched from a fuel discharge passage formed in the cover, and a vent hole of a spring chamber is open at a lower position in the gravitational direction.

Abstract: A method is used for operating an internal combustion engine (10), in particular of a motor vehicle. In the method, at least one fuel pump (22, 32) delivers the fuel from a fuel tank (28) into a fuel line (20, 24, 26, 34). The pressure of the fuel, at least in a region (26) of the fuel line (20, 24, 26, 34), is increased as a function of an operating state. In order to assure a reliable starting of the engine (10), the pressure of the fuel, at least in the above-mentioned region (26) of the fuel line (20, 24, 26, 34), is at least intermittently increased (75) when the engine (10) is not running.

Abstract: The present invention provides a common rail fuel injection device, by means of which it is possible to discharge air, which is entrained with fuel in the fuel supply path, from injectors, whilst avoiding any effect on the combustion characteristic, by adopting an existing common rail fuel injection device to which no changes have been made.

Abstract: A high-pressure fuel supply system has a reservoir for supplying high-pressure fuel to fuel injectors, a low-pressure pump that withdraws fuel from a fuel tank and that discharges fuel at a pressure substantially equal to or higher than a predetermined pressure since the starting of an internal combustion engine, a high-pressure pump for force-feeding high-pressure fuel to the reservoir, a pressure booster that boosts a pressure of fuel in the reservoir when starting the internal combustion engine, and a fuel passage that allows fuel to flow only from the fuel tank to the reservoir so as to prevent fuel vapors from being generated in the reservoir while the engine is out of operation. Thus, it becomes possible to reliably boost a pressure in the reservoir when starting the internal combustion engine.

Abstract: A fuel supply apparatus is provided which works to supply fuel such as a dimethly ether used as an alternative to a typical fuel for an internal combustion engine. The fuel supply apparatus includes a high-pressure pump working to feed the to injectors from a fuel tank through a common rail, a fuel return line, and a compressor working to add to a back pressure higher than a vapor pressure of the fuel to the return line. The addition of the back pressure higher than the vapor pressure of the fuel facilitates liquidizing of the fuel. This results in a decrease in leakage of the fuel, which improves the efficiency of burning of the fuel and ensures the startability and drivability of the engine.

Abstract: A vapor separator in an outboard machine which can continuously inject an accurate and stable fuel toward an intake pipe without sucking bubbles discharged from a pump chamber in a high pressure fuel pump and bubbles within the vapor separator by the high pressure fuel pump, structured such that a filter (2) is arranged in a bottom portion (1A) of a fuel pump receiving case (1), an upstream chamber (10) of the filter (2) is connected to a vapor separator (V) via a fuel inflow passage (1C), a fuel inflow passage (PA) of a high pressure fuel pump (PH) received and arranged within the fuel pump receiving case (1) is connected to a downstream chamber (5) of the filter (2), a vapor discharge chamber (9) is formed so as to face to a bottom portion (PF) of the high pressure fuel pump (PH), a vapor discharge port (PE) of the high pressure fuel pump (PH) is open to the vapor discharge chamber (9), the vapor discharge chamber is communicated with an annular chamber (11) formed by an outer periphery (PG) of the high pre

Abstract: A feed device (2) for fuel in a motor vehicle has a pressure regulating valve (7) arranged in a forward-flow line (6) leading to an internal combustion engine. The pressure regulating valve (7) is activated by a pressure within a return-flow line (10) and opens or closes a branch (8) leading to a suction jet pump (5). A pressure provided in the forward-flow line (6) can thereby be regulated with particularly high accuracy.

Abstract: A fuel vapor separator is disclosed having a fuel distribution network, a damper chamber, and a closed biased vent valve. The fuel vapor separator has a housing having two opposed ends enclosed by top and bottom covers. The housing is formed by extrusion and the top and bottom covers are molded identically. An integral fuel distribution network is provided to supply fuel to each fuel injector of an engine and to receive fuel return from each fuel injector. A fuel damper chamber communicates with the fuel inlet port to absorb pressure surges. A fuel float having an upwardly extending float arm is located in an enclosed fuel chamber and connected to a closed biased vent valve mounted in the housing. The float is arranged to decouple from the closed biased vent valve to present “engine spit.

Abstract: A fuel supply system for an outboard motor regulates the fuel pressure to a vapor separator in a fuel injection system by using a pressure relief valve that returns excess fuel to the intake of the fuel pump. In order to permit excess fuel flow without substantial excess at low speeds, the fuel pump speed is regulated depending upon engine speed, fuel temperature, and fuel pressure.

Abstract: A single point fuel injection system for an internal combustion engine including a throttle body having first and second air intake throats corresponding to first and second intake manifold planes of the engine, the air flow through each throat being controlled by throttle plates positioned within each throat. The throttle body further includes a fuel accumulating bowl which is integrally formed with the throttle body, the bowl being enclosed by a diaphragm and cover member. Within the enclosure of the fuel bowl are positioned a pair of injectors which are adapted to inject pulsed portions of fuel through a sonic nozzle and into the air intake throat of the throttle body. The injection of pulses of fuel into the throat is timed in accordance with the sensing of the crankshaft reaching a position of 15.degree. before top dead center to enhance the distribution of fuel charge from cylinder to cylinder.

Abstract: A fuel injection system is proposed which serves to supply fuel to a mixture-compressing, externally ignited internal combustion engine. The fuel injection system includes an air flow rate member, which actuates a metering and distribution valve. A reservoir is disposed in a pressure control line which branches off from a fuel supply line, by means of which reservoir a flushing valve can be affected in such a manner that below a certain fuel pressure in the pressure control line the flushing valve is opened, as a result of which the fuel supplied to the individual injection valves can flow back through outflow lines to the fuel tank and thus closes the flushing valve above the certain fuel pressure. Above the certain fuel pressure, the electrical circuit of the starter motor is simultaneously closed. Thus, upon starting the engine, all the lines and units of the fuel injection system are filled with fuel, so that a secure start is assured.

Abstract: A fuel supplying device for an internal combustion engine having a fuel supply passage (4) for introducing fuel fed from a fuel pump (2) at a substantially constant pressure to a fuel injector (9) operative at a predetermined constant pressure. The fuel injector is installed at a congregated portion (7) of engine intake manifolds (8). A metering valve (11) includes a motor (13) so that drop is maintained substantially constant by a differential regulator (12). The metering valve is disposed in an intermediate portion of the fuel supply passage. Calculating means (15) including a servo signal generator (18) calculates an injection flow amount causing a predetermined air/fuel ratio on the basis of signals of various engine running factors. An operational signal output from the servo signal generating circuit of the calculating means is applied to the drive motor means for driving said metering valve to thereby inject fuel into the intake manifolds.

Abstract: A fuel injection system which serves to supply fuel to a mixture-compressing, externally ignited internal combustion engine which includes an air flow rate member for actuating a metering and distribution valve, a flushing valve is disposed in an outlet line leading from each injection valve to a return flow line open when the engine is turned off and immediately after actuation of the ignition switch of the engine, enables a return flow via the outlet lines of the fuel flowing through the fuel supply line and the metering and distribution valve assembly to the injection valves until an electromagnetic valve drivable by a time control element opens a pressure line to a pressure chamber of the flushing valve, and the pressure prevailing in the pressure chamber opens a diaphragm connected to the movable valve parts of the flushing valve in such a manner that the flushing valve closes.

Abstract: The invention pertains to a fuel system for internal combustion engines in which the unburned, heated fuel which is permitted to flow back to the tank from the fuel metering assembly is deaerated via an apparatus in order to prevent gases from re-entering the fuel supply pump when the fuel is reinduced thereto. By the inclusion of a jet pump between the fuel return line and the induction line, the degree of efficiency of the fuel supply pump is substantially increased.