Abstract: A fuel injector includes an injector body, and a plunger movable within a plunger cavity in the injector body. The fuel injector also includes a spill valve positioned at least partially within a main fuel passage, a fill passage forming a fluid connection between the plunger cavity and the main fuel passage, and a cross passage forming a second fluid connection between the plunger cavity and the main fuel passage. The fuel injector also includes a metering edge within the plunger cavity and positioned such that the plunger passes the metering edge during pumping to the plunger for valvetrain noise suppression. A metering slot may be formed in the injector body or the plunger.

Abstract: At least one choked flow passage communicates between one side of the movable member and the other side of the movable member and limits an amount of fuel, which passes from the one side of the movable member to the other side of the movable member, when the movable member is moved by an urging force of a relief spring toward a valve element. A larger amount of fuel, which is larger than the amount of fuel that is passable through the at least one choked flow passage, flows from a first return flow passage to a second return flow passage, when the movable member is moved toward the other side, which is opposite from the valve element, against the urging force of the relief spring.

Abstract: In a fuel system of an internal combustion engine, a low-pressure delivery unit for the fuel, at least indirectly delivers fuel to at least one low-pressure injection device. The fuel system further provides a high-pressure delivery unit, which has a drive region and a delivery region and at least indirectly delivers fuel to at least one high-pressure injection device. According to the invention, the fuel is first delivered by the low-pressure delivery unit to the drive region of the high-pressure delivery unit and from there onward to the low-pressure injection device and/or to the delivery region of the high-pressure delivery unit.

Abstract: A method of deriving a formula (FIG. 4) for calculating a quantity of fuel injected by an electric-actuated fuel injector (16) during an injection wherein duration of the injection is set by duration of an electric signal (P1, P2) applied to the fuel injector and pressure (ICP) at which the fuel is injected is set by pressure of hydraulic fluid applied to the fuel injector. The fuel injector is mapped by applying, various combinations of different selected hydraulic fluid pressures and different selected durations of the electric signal to create data sets of the corresponding selected hydraulic fluid pressure, the corresponding selected electric signal duration, and the quantity of fuel injected. Data from the data sets is processed to create terms of a multiple term mathematical formula that is used to calculate the quantity of fuel injected.

Abstract: A fuel injection device having a fuel pump for each cylinder of an internal combustion engine, which fuel pump has a pump piston that is driven into a stroke motion by the engine and delimits a pump working chamber, which is supplied with fuel from a fuel tank and is connected to a fuel injection valve, which has an injection valve member that controls at least one injection opening and can be moved by the pressure generated in the pump working chamber in an opening direction counter to a closing force. A first electrically controlled control valve controls a connection of the pump working chamber to a discharge chamber, and a second electrically controlled control valve controls the pressure prevailing in a control pressure chamber of the fuel injection valve, which pressure acts on the injection valve member in the closing direction.

Abstract: A simple propulsion engine utilizing unheated atmospheric air as the propellant, and driven by a single cycle (unicycle) engine with internal combustion cylinder and free piston is disclosed. A free piston with an annularly arranged thrust piston to divide a dual-diameter cylinder into two combustion chambers and two thrust chambers is provided. Scavenge feeder lines connected the thrust chambers to the combustion chambers via check valves provide exhaust scavenging, additional thrust output through exhaust nozzles, and feeding of fresh air into the combustion chambers. Also, pressure-actuated fuel injectors utilize pressure changes in respective combustion chambers to inject fuel at the appropriate time. The fuel injector includes an intensifier piston and pintle to raise the fuel pressure.

Abstract: Fuel metering system for feeding fuel from a storage tank (2) to the cylinders (6) of a combustion engine (8), comprising a fuel supply unit (1) and a distributing device (4, 4', 4") which comprises a least one rotor driven depending on the rotational position of a crankshaft (16) or camshaft of the combustion engine (8), with the fuel supply unit supplying fuel from the storage tank (2) to the distributing device (4, 4', 4") and with the distributing device (4, 4', 4"), depending on the rotational position of the rotor, sequentially feeding fuel to the cylinders (6) of the combustion engine. The fuel supply unit (1) continuously supplies fuel to the distributing device (4, 4', 4"). The rotor (13) is driven continuously, with the angle of rotation of the rotor (13) being a continuous function of the angle of rotation of the crankshaft (16) or camshaft.

Abstract: In a timer device having a timer sleeve at a housing with a timer piston slidably provided at the timer sleeve, a high pressure chamber is constituted by securing to the housing a high pressure side cover member constituted as an integrated part of the timer sleeve. The high pressure chamber and a passage at the housing communicating with a chamber are connected to each other by a passage formed in high pressure side cover member. A check valve for absorbing shock waves generated within the high pressure chamber is provided in the passage in the high pressure side cover member. The passage can be designed and manufactured with ease, and at the same time, the timer piston and the check valve can be separately designed and manufactured. Furthermore, stable operation of the check valve is achieved.

Abstract: An air/fuel induction system includes a pair of solenoid valves injecting fuel into an induction passage of a multi-cylinder engine. The valves supply fuel upstream of the inlet manifold to the engine and do not therefore direct fuel to specific cylinders. The solenoids (36, 36a) operate alternatively through pulses developed by drive units controlled by a microprocessor-based control unit (19). Each valve is independently timed by a respective timer-counter (44, 45) and valve operation overlaps in some circumstances. This allows smaller valves to be used and overcomes the problem of gusting at low speeds. The system may be applied to an LPG fuel system used as an additional fuel supply.

Abstract: A fuel pumping apparatus for supplying fuel to a multi-cylinder internal combustion engine includes a high pressure pump which supplies fuel in timed relationship with the engine. The fuel is distributed to fuel outlets in turn by means of an axially movable distributor member which has a groove connected to the high pressure pump and which can register with ports connected to the fuel outlets respectively. The distributor member is actuated by a lever means mounting rollers which engage cam profiles on a cup-shaped cam. The cam profiles are arranged such that the groove dwells at each port during the time fuel flows through the groove and port.

Abstract: A fuel injection pump has a single plunger either electromagnetically or hydraulically actuated for flow of fuel into a fuel distribution chamber from which the fuel is distributed individually to each engine cylinder past a series of small solenoid controlled outlet valves actuated one at a time in sequence with the engine firing order.

Abstract: A fuel injector, especially adapted for diesel engines, produces a fuel injection pulse having a predetermined time-variable flow rate. Preferably the injection pulse is ramp-shaped which approximates a linear function of time. A pressure chamber receives fuel at a substantially constant flow rate and an injection valve connected therewith opens in response to the pressure in the pressure chamber for delivering a fuel injection pulse to the combustion chamber. Means for absorbing a fluid pulse, in the form of an absorption chamber and flow restrictor, is connected with the pressure chamber to accept a ramp-shaped absorption pulse which is inversely related to the injection pulse.