Abstract: A fuel system for an engine is disclosed. The fuel system has a first source configured to pressurized fuel to a first pressure, and a second source configured to pressurized fuel to a second pressure. The fuel system also has a fuel injector configured to receive fuel at the first pressure and the second pressure, and a valve disposed between the fuel injector and the first and second sources. The valve is configured to modify the pressure of fuel from the first source based on a pressure of fuel from the second source.

Abstract: A fuel pump noise-reduction apparatus in a Liquefied Petroleum Injection (LPI) vehicle comprises a Liquefied Petroleum Gas (LPG) switch. A plurality of shut off valves are configured for activation upon stoppage of battery power via the LPG switch. A fuel pump in a fuel tank is configured for activation upon stoppage of battery power via the LPG switch. The shut off valves close and the fuel pump stops simultaneously when the LPG switch is deactivated, contributing to a reduction in noise and engine output consumption due to unnecessary operation of the fuel pump when the engine stops.

Abstract: A high-pressure fuel pump for an internal combustion engine is proposed, in which the regulating behavior in idling and lower partial-load operation is improved to such an extent that a separate pressure regulating valve in the high-pressure region of the fuel injection system can be dispensed with.

Abstract: An in-tank fuel supply unit is provided for supplying fuel from a fuel tank to an engine. The fuel supply unit generally comprises a fuel delivery module and a jet pump assembly selectively attachable to the fuel delivery module. The fuel delivery module has a housing defining a reservoir and includes a fuel pump for pressurizing fuel in the reservoir. The jet pump assembly has a suction tube defining a suction chamber and a nozzle situated inside the suction chamber. The nozzle receives pressurized fuel from the fuel pump and sprays the fuel from a nozzle tip at high velocity to draw additional fuel into the suction chamber through an inlet formed in the suction tube.

Abstract: A fuel injection system for an engine is configured of a downstream-side fuel injection valve which is provided to an intake passage connected to a combustion chamber, and from which fuel in the intake passage is injected, and an upstream-side fuel injection valve which is provided in the intake passage upstream of the downstream-side fuel injection valve, and from which fuel in the intake passage is injected. In the fuel injection system, a fuel injection pressure applied to the upstream-side fuel injection valve is set at a higher value than a fuel injection pressure applied to the downstream-side fuel injection valve. Fuel is injected from both injection valves on fuel injection shares depending on a detected load on the engine.

Abstract: An integrated fuel management system and method for controlling the fuel storage and delivery in a vehicle. The fuel management system includes a fuel storage tank for storing fuel in a vehicle, a vapor collection canister located within the fuel storage tank, a vent actuator coupled to the vapor collection canister for venting gas from the canister during a vent operation, and a purge actuator is coupled to the vapor collection canister for purging fuel vapor from the vapor collection canister during a purge operation. A variable speed fuel pump is disposed within the fuel storage tank for delivering fuel to a fuel delivery line for an engine. The fuel management system has a controller provided in a module disposed in communication with the fuel for controlling the amount of fuel pumped with the variable speed fuel pump to deliver fuel to the fuel delivery line and further controlling the purge and vent actuators.

Abstract: A method for operating an internal combustion engine in which a valve needle of a fuel injector is adjusted from a closing position via an intermediate position to an opening position and back again. The adjustment is carried out with the aid of a piezoelectric actuator to which a trigger signal is applied. To reduce the contamination danger of the fuel injector and to keep wear of the valve needle low, the trigger signal for triggering the piezoelectric actuator has a greater slope steepness during the transition of the valve needle from the closing position to the intermediate position than during the transition of the valve needle from the intermediate position to the opening position.

Abstract: A multi-port check-valve for a fuel vapor emissions system coupled to an intake manifold of an internal combustion engine with forced induction and of the type including a purge canister and a purge valve, comprising a first port coupled to the purge valve, a second port in fluid communication with the first port and having a first check-valve with a fixed orifice arranged to open in response to engine vacuum, and bleed intake manifold boost pressure.

Abstract: A supercharged diesel engine having at least one charged air conduit for distributing charged air and having a first chamber for conveying the charged air. Air inlet openings of the cylinder head are connected to the first chamber in a gastight manner. The charged air conduit has at least one second chamber, which is separate from the first chamber and has a removable lid. The fuel reservoir is secured in the second chamber, which is provided with a first passage allowing the high pressure fuel line and the fuel reservoir to communicate with one another. The second chamber has at least one second passage, facing the cylinder head, allowing the fuel injection lines and fuel connections on the cylinder head to communicate with one another. With the lid in place, the second chamber encloses the fuel reservoir, the fuel injection lines and the fuel connections such that in the event of leakage at any of them, leaking fuel flows into the second chamber.

Abstract: An accumulator fuel injection system working to energize fuel injectors to inject fuel at a sequence of injection timings into an internal combustion engine and also to control a fuel pump to feed the fuel to an accumulator at a sequence of controlled times for compensating for the amount of the fuel flowing out of the accumulator under feedback control. When having found a failure in operation of at least one of the fuel injectors, the system alters a mode of the feedback control to decrease the amount of fuel fed to the accumulator at one of the sequence of the controlled times which is at a selected interval away from one of the sequence of the injection timings at which the at least one of the fuel injectors is to be energized, thereby ensuring a steady balance between the amounts of fuel flowing into and out of the accumulator.

Abstract: An arrangement in the fuel injection system for controlling the fuel injection, the arrangement comprising a body part with a space arranged therein, through which space the fuel to be injected flows during operation, the space further having an inlet opening and an outlet opening therein. The arrangement further comprises a piston means, arranged movably in the space and a flow path for creating a flow connection between the fuel inlet and the fuel outlet openings. The flow path comprises at least one throttling portion opening into the space of the body part, the cross-sectional flow area of the throttling portion being defined by the relative positions of the piston means and the body part.

Abstract: A system, apparatus, and method for predicting an engine operating condition and providing a component in accordance with the prediction.

Abstract: An internal combustion engine (1) provided with a valve mechanism (VM) able to change a valve opening characteristic of at least one of an intake valve (Vi) and exhaust valve (Ve), a cylinder pressure sensor (15) for detecting a cylinder pressure in a combustion chamber (3), and an ECU (20), wherein the ECU (20) calculates the amount of air sucked into the combustion chamber (3) based on an intake air pressure during valve overlap between the intake valve (Vi) and the exhaust valve (Ve), the exhaust gas pressure during valve overlap, a cylinder pressure during the compression stroke detected by a cylinder sensor (15), and a gas passage effective area during valve overlap.

Abstract: The invention relates to an injector for a common rail injection system of an internal combustion engine, having an injector housing, a valve element disposed in the injector housing, a sealing ring acting as a seal between a high-pressure region and a low-pressure region of the injector, and a support ring, disposed together with the sealing ring in an annular chamber between the injector housing and the valve element, for bracing the sealing ring, which is provided, in its underside remote from the sealing ring, with a plurality of relief grooves spaced apart in the circumferential direction and, in its outer circumferential edge, with a plurality of recesses spaced apart in the circumferential direction. The relief grooves and the recesses are disposed in offset fashion in the circumferential direction.

Abstract: An electroinjector is provided for controlling fuel injection in an internal-combustion engine. The electroinjector includes an electroactuator, an injection nozzle, and a pin, which is movable along an opening stroke and a closing stroke for opening/closing the nozzle under the control of the electroactuator and according to the supply pressure of the fuel into the electroinjector. A first electrical command and at least a second electrical command, which are sufficiently close to one another as to displace the pin with a profile of motion without any discontinuity in time, and such as to cause the pin to perform a first opening displacement and, respectively, a second opening displacement, are supplied to the electroactuator.

Abstract: An evaporative emissions canister is used in an automotive evaporative emission system to separate liquid fuel entrained with fuel vapor and to control emission of fuel vapors to the atmosphere, the system including a fuel tank coupled to an automotive engine. The canister includes an integrally molded housing having side walls, a top wall and a bottom wall; a hydrocarbon-adsorbing material disposed therein so as to provide a vapor adsorbent chamber for adsorbing hydrocarbon fuel vapor flowing therethrough; and a liquid-fuel trap located above the vapor adsorbent chamber for separating fuel vapor and liquid fuel. A method is provided for preventing or reducing hydrocarbon emissions to the atmosphere.

Abstract: The following describes an apparatus for and method of clamping a device, such as a fuel injector, to a platform, such as a cylinder head, and thereafter removing the device from the platform together with the clamp. A retaining sleeve is deformed such that the retaining sleeve is held in place between the clamp and a ledge on a fastener disposed within the clamp. The retaining sleeve secures the fastener to the clamp during removal of the fastener, thereby providing that the clamp assembly and the device, such as a fuel injector, are removed together.

Abstract: A device for determining the mass flow via a tank venting valve for an internal combustion engine including an intake manifold and a throttle valve, the intake manifold being connected to the tank venting valve and an exhaust gas recirculation system, one measuring transducer each being assigned to the throttle valve and the tank venting valve, and a sensor for the mass flow via the exhaust gas recirculation system being assigned to the exhaust gas recirculation system.

Abstract: A damper for damping pressure pulsations in a liquid includes an outer tube having an inner surface defining an interior cavity, and an inner tube positioned within the interior cavity of the outer tube. The inner tube includes an outer surface such that at least one chamber is formed between the inner surface of the outer tube and the outer surface of the inner tube for containing a gas. The damper includes an exterior surface configured to be surrounded by the liquid and an interior surface configured to define a passageway through the damper for the liquid. The damper can define at least two, and in one embodiment, four separate chambers for containing a gas. The damper can be part of a fuel rail assembly and is positioned within a fuel rail configured to contain pressurized fuel.

Abstract: An improved pilot-operated, “instant-on”, solenoid isolation valve discloses a new fluid passage route to save cost of drilling a longitudinal hole within the primary piston. Also, a new feature of primary piston assembly with a movable seal piston having a specific circumferential surface matching to valve body chamber to restrict fluid from front side into back side of the primary piston to produce pressure difference to induce instant valve open when solenoid is energized initially. It also introduces a channel hole in the flange of the sleeve assembly as a communication channel of supply of gas into the chambers of the back side of primary piston assembly. The diameter of the channel hole is not critical to determine in this new invent. As long as the size of the hole is smaller than that of the bleed hole, it can maintain pressure difference between the front side and back side of primary piston during valve opening operation.