Abstract: A method providing solution of both of the problem of black smoke during the engine startup period and the problem of undershooting and hunting at the settling time. By adding at least an integral term QI to a basic injection quantity, feedback control of a fuel injection quantity of an engine is carried out. An initial integral term QI0, which is used during the engine startup, is predetermined. During the engine startup period, the integral term QI is set as “0” until an engine revolution number Ne reaches a predetermined startup revolution number Nes. When the Ne reaches the Nes, the initial integral term QI0 is used as the QI. The QI0 is preferably determined on the basis of one of, or both of, a water temperature and an atmospheric temperature. The Nes is preferably a value close to, or equal to, an idling revolution number Nei.

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: A fuel distributor for delivering fuel under pressure to cylinders of an engine. The distributor includes a housing, an inlet for delivering fuel under pressure to the housing, a plurality of outlets in the housing and a valve assembly mounted in each outlet. Each valve assembly is for connection to a fuel injector mounted in a cylinder of the engine, and each assembly includes a passage for delivering fuel under pressure from the housing, a plunger positioned in the passage, and a valve spring biasing the plunger to one of a passage open position and a passage closed position. The fuel distributor also includes a cam for moving the plungers against the valve springs, whereby movement of the cam controls fuel flow to the cylinders.

Abstract: A fuel management system that separates the three-dimensional functions of fuel injection pressure, volume and timing and thus eliminates co-dimensional dependencies. The system of the invention utilizes volumetric injection control and is based on displacement of a predetermined volume rather than volume generated by flow due to pressure with respect to time, as in prior art systems. In one of its simplest configurations, the fuel management system combines a pair of "sister" injectors and a volumetric injection control assembly comprised of a simple displacement piston which free floats a given distance to deliver fuel alternately to each injector. When one injector's solenoid valve operates to activate it's main injection, it simultaneously loads the adjacent injector with a predetermined volume of fuel for the adjacent injector's main volume injection. Throttling fuel volume is controlled by controlling the length of the cylinder's barrel containing the free floating piston.

Abstract: A fuel injection system having a novel electromagnetic-actuated fuel pump in which four pumping elements, equally-spaced around a camshaft are mounted such that a pair of opposed pumping elements alternate to deliver pressure to a high pressure common rail with a second pair of pumping elements. In one embodiment of the invention the pumping elements are mechanically actuated, in another they are electronically actuated. The high pressure common rail is adapted to reduce surges in the fuel pressure from the pump up to levels of 20,000 psi. The common rail has a relief valve for controlling the maximum pressure in the common rail chamber. The electromagnetic injection nozzle has a needle valve that is closed by pressure in a balancing chamber having a reduced pressure level less than that of the pressure required to open the valve.

Abstract: The invention relates to a distribution and control valve in a fuel injection engine pump especially for a large multi-cylinder diesel engine, in which the fuel is injected into the cylinder by mdans of two or more injection valves (A;B). The pump includes a pump cylinder (1) and, inside thereof in a pump chamber (2), a reciprocatingly movable piston member (4), which is arranged through its movement to feed fuel via distribution ducts to the injection valves of the cylinder in question. The pump cylinder (1) is provided with an extra chamber (11) connected to the pump chamber (2), to which extra chamber there is tightly adapted a long-shaped valve member (12) following the movements of the piston member in the axial direction thereof, and inside the valve member (12) there is a fuel duct (13) connected to the pump chamber (2). The feed ducts (16;5a,5b) of the separate valves are connected to the extra chamber (11) in the axial direction of the valve member (12) to different points distant from each other.

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 positive displacement fuel injection system for use with a combustion engine including a fuel pump (10,10') which forms and delivers pre-metered slugs of fuel and timing fluid to unit injectors (300,300') associated with the engine combustion chambers. The pre-metered slug of timing fluid has a prescribed volume and sets the timing advance for the unit injector. The fuel pump can vary the size of the pre-metered slugs of fuel and timing fluid on a cycle-by-cycle basis.

Abstract: A method of controlling injection timing and an apparatus using the method. The method includes the steps of transmitting a first pulse to a first valve member movably disposed in an injector nozzle holder, moving the first valve member in response to the first pulse to bring first predetermined passageways into registry to initiate an injection cycle, transmitting a second pulse to a second valve member coaxially disposed relative to the first valve member and moving the second valve member in response to the second pulse to bring second predetermined passageways into registry to end an injection cycle.

Abstract: A fuel distributing device, having a main body, a first external line interposed the needle of an injector and the main body, a second external line interposed the main body and the delivery outlet of the injector, and a third line and a fourth line connected to a source of pressurized fuel. A sleeve, by its position within the main body in which it slides, defines the period of injection, and, consequently, the amount of fuel injected, as determined by the load on the engine. A slide valve moves in each injection cycle and its position controls the initiation of the fuel injection cycle. The slide valve is driven independently of the sleeve.

Abstract: A fuel injection pump includes a number of plungers of the fill/spill port control type, the plungers being hydraulically connected in pairs and through a single shuttle valve to a single fuel spill port controlled by a single solenoid controlled spill valve, the plungers being operable in sequence and in succession to condition one plunger at a time for fuel pressurization while the remaining plungers are in various other phases of operation refilling their fuel chambers with fuel or preparing the air fuel chamber for pressurization.

Abstract: The present invention consists in apparatus for the uniform distribution of fuel to a multi-cylinder spark ignition engine comprising a fuel metering device arranged to deliver discrete metered quantities of fuel in accordance with the requirments of the cylinders of the engine, means defining a catchment chamber arranged to receive each such quantity, a plurality of passages extending from said chamber, one for each cylinder of the engine, each said passage being connected through a conduit to the induction passage of one cylinder, means for admitting gas under pressure to said passages to expel each quantity of fuel from the chamber and means for directing the flow of gas from said chamber along each of said passages in turn whereby a metered quantity of fuel is delivered to each cylinder in turn.

Abstract: A fuel injection pump of the radial plunger, spill port type includes electromagnetic means for opening and closing the spill port to control the pressurization of fuel for injection of fuel to the individual engine cylinders; a single solenoid assembly controlling the flow of fuel to and from a pair of pumping plungers in response to the movement of a shuttle valve mechanism; in one embodiment, a single retraction type delivery valve is used in connection with each pumping plunger and, in a separate embodiment, a single retraction type delivery valve is integrated with the shuttle valve mechanism which controls the individual delivery of fuel to a pair of engine cylinders.

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 multi-plunger fuel injection pump consisting of a number of reciprocable fuel pumping plungers to which is distributed fuel by a fuel distributor plunger, all of the plungers being actuated by a common camshaft, the number of distributor plungers being less than that of the pumping plungers and determined as a function of the operating range of the pump, the fuel flow to and from the individual pumping plungers being controlled by a solenoid operated spill control valve that is selectively operable to determine both the timing and duration of fuel injection.

Abstract: To provide for a compact and readily controlled injection system, so that initiation of fuel injection, and termination thereof can be electrically controlled, and independently of mechanical injection control pressure, and to provide for use of only a single connection line between a fuel supply (33-36; 32-41) and the respective injection valves (11-14), a piezo-electrically controlled control valve (38, 59) interposed between two each injection valves, which are, each operated by cams (2-5) to provide injection pressure. The injection valves (38, 39) permit communication, or blocking of the respective single lines (30, 31, 39, 40) from the fuel supply lines (32, 41), which will then function both as fuel supply, as well as overflow and drain lines. The cams (25) of paired valves are so arranged and offset that when one of the paired valves is commensing its injection stroke, the other one of the paired valves is moving into its OFF position.

Abstract: A fuel injection apparatus for controlling fuel injectors for internal combustion engines which injectors remain normally shut as a result of a high fuel pressure applied on either side of injector fuel nozzles. The apparatus of the present invention includes a first slide valve member which, by sliding from one extreme position to another, is able to lower the pressure below a fuel nozzle associated with a fuel injector to start a fuel injection cycle in that injector. The apparatus also includes a second slide valve member which, by sliding from one extreme position to another, is able to increase the pressure below the fuel nozzle to end the fuel injection cycle and control the duration of the fuel injection cycle as well as the flow rate of the injected fuel. The first and second slide valve members return to their initial positions after two consecutive fuel injection cycles.

Abstract: A fuel system for supplying fuel to a pair of injection nozzles of an engine comprises a pair of pumps which can only deliver half the maximum amount of fuel which may be required. Each pump supplies fuel to a respective nozzle when the fuel required is less than half and the system includes a pair of valves which are operated to allow both pumps to deliver fuel through one nozzle when more than half the maximum amount of fuel is required, the pumps then being operated at twice the previous rate to supply fuel to the nozzles in turn.