Abstract: A fluid pump is proposed. The fluid pump includes: a housing having an operation space and having connection ports disposed at a side in the operation space to discharge working fluid and suctioning working fluid from the outside; a swash plate coupled to the housing at an opposite side to the connection ports and having an inclined surface on a top facing the operation space; a cylinder block disposed in the operation space to be rotated by a driving shaft and having several cylinder rooms therein that extend in parallel with the driving shaft.

Abstract: This invention concerns a method and apparatus for dispensing minute quantities of highly viscous material from a jetting needle when an expelling mechanism is activated using a nozzle plate with a jetting chamber having a top formed by a diaphragm and a bottom in fluid communication with a jetting needle. Fluid enters the chamber from an inlet channel and is jetted from the chamber by deforming the diaphragm to block the channel and expel a drop of fluid from the needle. A diaphragm driven metering chamber and/or reservoir chamber can optionally be used provide fluid to the jetting chamber.

Abstract: A fuel injector has an injector body and a control rod, which is movable in the injector body along an axis for controlling opening/closing of a nozzle that injects fuel in an engine cylinder; the injector body houses a metering servovalve, provided with a control chamber and with an open/close element of a balanced type, axial sliding of which causes a variation in pressure in the control chamber; the metering servovalve comprises a valve body made of two pieces coaxially coupled to one another via a deformable ring, which defines also a gasket for guaranteeing fluid tightness between the two pieces and maintains in a fixed position a disk on which a calibrated restriction is made.

Abstract: Multiple intensifier injectors with positive needle control and methods of injection that reduce injector energy consumption. The intensifiers are disposed about the axis of the injectors, leaving the center free for direct needle control down the center of the injector. Also disclosed is a boost system, increasing the needle closing velocity but without adding mass to the needle when finally closing. Direct needle control allows maintaining injection pressure on the fuel between injection events if the control system determines that enough fuel has been pressurized for the next injection, thus saving substantial energy when operating an engine at less than maximum power, by not venting and re-pressurizing on every injection event.

Abstract: A method and system of controlling operation of a diffusion appliance to treat the atmosphere within an enclosed space. The appliance may be programmed to operate according to a control scheme specifying a flow rate of liquid to a diffusion means and a periodic operation of the diffusion means. Control schemes may be associated with different volumes of spaces to be treated by the appliance. Anti-fatigue schemes may provide variation of the flow rate or periodic operation of the appliance. Initiation controls schemes may be used to start treatment of the space before the appliance is programmed to operate according to one of the control schemes.

Abstract: The present invention relates to a device for impulse ejection of medium, comprising an ejection tube (1) for medium to be ejected therefrom through an ejection end of the ejection tube (1) by way of a propellant in pulsed fashion in an ejection direction (15), a membrane (6) in the area of the ejection end (1), said membrane being elastically deformable during ejection of medium for forming a passage opening (20) for medium, and a nozzle element (9) in the ejection tube (1), said nozzle element being adapted to be movable along the ejection direction between a rest position (9?) and an ejection position (9?), wherein the nozzle element (9) in the ejection position (9?) effects a deformation of the membrane (6) to form the passage opening (20) and in the rest position (9?) effects a slight deformation or no deformation of the membrane (6) and wherein the nozzle element (9) can be brought from the rest position (9?) to the ejection position (9?) when medium is ejected.

Abstract: Multiple intensifier injectors with positive needle control and methods of injection that reduce injector energy consumption. The intensifiers are disposed about the axis of the injectors, leaving the center free for direct needle control down the center of the injector. Also disclosed is a boost system, increasing the needle closing velocity but without adding mass to the needle when finally closing. Direct needle control allows maintaining injection pressure on the fuel between injection events if the control system determines that enough fuel has been pressurized for the next injection, thus saving substantial energy when operating an engine at less than maximum power, by not venting and re-pressurizing on every injection event.

Abstract: A mixing valve assembly 42 is communicated with a dedicated tank 51D, storing therein a compatibilizer D, via an inlet valve 43 and is also communicated with dedicated tanks 51A-51C via three injection valves, the tanks storing therein auxiliaries A-C respectively. A chemical formulation is prepared by selectively injecting any one(s) of four chemical agents into the mixing valve assembly 42 by way of on-off control of the inlet valve 43 and the injection valves and blending together the injected chemical agents. Then, the chemical formulation is pumped into SCF by a high-pressure pump 45 such that the SCF and the chemical formulation are mixed together to form a process fluid. Thus, the number of components of a high-pressure portion can be reduced to achieve a cost reduction of an apparatus. Furthermore, a pipe line for pumping the chemical agents is simplified.

Abstract: A fuel injection method is provided for correcting the fuel injection amount accurately by eliminating offset components when detecting a current flowing through a solenoid for fuel injection. A current component, which is detected during normal running and a drive current flowing through the solenoid for fuel injection is OFF (Step 11), is input to an A/D converter that stores the value thereof (Step 12). Thereafter, the drive current is turned ON (Step S13), elapse of a fixed time period is waited (Step S14), and an input voltage of the A/D converter is detected (Step S15). A difference current (offset component) is calculated by subtracting the offset voltage from the input voltage (Step S16), and a current span is adjusted based on a span correction factor (Step S17). Thereafter, a pulse width current correction factor is calculated (Step S2a) and, based on the pulse width current correction factor, a drive pulse width is calculated (Step S2b) and provided to the solenoid.

Abstract: A fuel injection valve includes a valve member, a first stop member, a second stop member, a movable core, a fixed core, and a coil. The valve member opens and closes an injection nozzle. The first stop member protrudes radially outward from said valve member. The second stop member protrudes radially outward from said valve member. The movable core is sandwiched between said first and second stop members. The movable core and one of said first and second stop members defines a fuel chamber. The fixed core is axially displaced from said movable core. The coil causes reciprocal axial displacement of said valve member such that said movable core axially reciprocates toward and away from said fixed core therewith.

Abstract: A fuel injection valve has: a tubular body, a valve seat member, a valve body, a core tube, a bias spring, and an electromagnetic actuator. The core tube is press fitted into the tubular body. The core tube has a first end side opposing an absorption section of the valve body in such a manner as to form an axial gap interposed between the first end side of the core tube and the absorption section. The core tube has a second end side axially extending in the tubular body to a certain position on a way to the second end side of the tubular body. The axially extending second end side of the core tube has an outer periphery which is formed with a reduced diameter section for increasing an accuracy in positioning the core tube when the core tube is press fitted into the tubular body.

Abstract: The injector tip of an injection valve which injects directly into the combustion chamber protrudes therein, thereby incurring the risk that combustion residues can become deposited on the injector tip. When the injection valve is in a closed state, the possible attachments of combustion residues along a separation line (10) are eliminated by means of a special configuration of the surface at the separation line (10) between the valve body and a valve plate. The surface is represented in a smooth, step-less, edge-less and curved manner.

Abstract: A fuel supply method for a fuel injection device including a fuel injection unit, comprising: supplying fuel to a first fuel injection member of the fuel injection unit through a first fuel supply passage internally formed in a holding-and-supplying unit holding the fuel injection unit; and supplying fuel to a second fuel injection member of the fuel injection unit through a second fuel supply passage internally formed in the holding-and-supplying unit.

Abstract: A solenoid end cap assembly having a flat mating surface. The flat mating surface is a single planar mating surface and is designed to mate with a substantially flat mating surface of a valve control body. The solenoid, housed within the solenoid end cap, does not protrude past the flat surface and may form part of the substantially flat mating surface of the solenoid end cap. The flat mating surfaces of the valve control body and the solenoid end cap assembly eliminates the need for ring dowels in the assembly between the solenoid and the valve control body. This reduces manufacturing costs and assembly time. The flat mating surfaces also provide a uniform mounting surface for the solenoid from injector to injector. This increases performance characteristics, as well as increases thermal conductivity and magnetic conductivity characteristics.

Abstract: This invention is to improve the reproducibility and yield in separating a bonded substrate stack. A bonded substrate stack having a porous layer inside is held by substrate holding portions 105 and 106, and a fluid is injected from a nozzle to the porous layer of the bonded substrate stack, thereby separating the bonded substrate stack at the porous layer. The variation in pressure of the fluid is suppressed within a predetermined range by a servo-driven pump.

Abstract: Fuel injector having a sleeve-shaped connector (22), injection nozzle (12) and injection line (14).

Abstract: The invention relates to an injection valve (1) comprising a booster piston (23), said piston delimiting a pump chamber (22) and a booster chamber (29). A valve (14) is provided in the inlet to the chamber (22). The valve is configured as a 3/2-way valve and controls the pressure in the pump chamber (22). The pressure in the pump chamber (22) is converted into a correspondingly increased pressure in the booster chamber (29) and in an injection chamber (34) containing an injection needle (6), by means of the booster piston (23). The use of the valve (14) allows a precise control of the injection times.

Abstract: An injector has two interconnected main sections, a body section and an injector section. The injector section is connected to the body section by way of a form lock, and the connection is produced by a partial material connection. The injector is preferably suitable for use in a fuel-injection device for an internal combustion engine.

Abstract: A fuel injection device includes a housing with an injection end and a recess extending in the housing. An axially movable valve element disposed in the recess cooperates with a valve seat, which axially defines a control chamber. A sleeve part radially defines the control chamber. A device presses the sleeve part against a first housing portion and the valve element in the direction of the injection end, and includes separate prestressing devices acting one upon the valve element and the other upon the sleeve part.

Abstract: This invention is to improve the reproducibility and yield in separating a bonded substrate stack. A bonded substrate stack having a porous layer inside is held by substrate holding portions 105 and 106, and a fluid is injected from a nozzle to the porous layer of the bonded substrate stack, thereby separating the bonded substrate stack at the porous layer. The variation in pressure of the fluid is suppressed within a predetermined range by a servo-driven pump.

Abstract: A fuel injection valve includes a housing in which a pistonlike valve member is disposed longitudinally displaceably in a bore to cause at least one injection opening to communicate with a pressure chamber embodied in the housing. An inlet conduit discharges into the pressure chamber to fill the pressure chamber with fuel at high pressure. A fuel-filled control chamber in the housing at least indirectly exerts a force acting in the closing direction on the valve member. The control chamber communicates with the inlet conduit and can be made to communicate via a control valve with a leak fuel chamber. A damping chamber communicates with the inlet conduit via a throttle.

Abstract: For each cylinder of the internal combustion engine, the fuel injection system has one high-pressure fuel pump and one fuel injection valve communicating with it. A first pump piston of the high-pressure fuel pump defines a pump work chamber, which communicates with a pressure chamber of the fuel injection valve; the fuel injection valve has an injection valve member, by which injection openings are controlled, and which is movable by the pressure prevailing in the pressure chamber in an opening direction counter to a closing force. The high-pressure fuel pump has a second pump piston, which defines a work chamber, and on which, after an initial pumping stroke, the first pump piston comes to rest, so that the second pump piston likewise executes a pumping stroke.

Abstract: A high pressure fuel supply apparatus 6 having: a plunger 161 reciprocating and sliding in a sleeve 160 of a high pressure fuel pump 16 so as to form a fuel pressurizing chamber 163 between the plunger 161 and the sleeve 160 to thereby discharge pressurized fuel; a tappet 164 reciprocated while abutting against the plunger 161; and a cam 100 abutting against the tappet 164 so as to reciprocate the tappet 164 and the plunger 161; wherein the tappet 164 has a recess portion 164a formed near a central portion of an abutment surface of the tappet 164 against the plunger 161.

Abstract: A system for automating the growing of crops, such as grapevines. Combinations of data from sensors local to a vineyard, and from optional remote stations and sensors, is combined with a control system to accurately control the dispensing of water and chemicals such as insecticides, disease prevention fungicides and fertilizers. The materials are dispensed through a multiple channel conduit which allows conflicting, or incompatible, types of materials to be transported through a common assembly. Sensors are attached to the conduit so that the placement of sensors can occur simultaneously with the laying of the conduit. This approach also ensures correct placement and spacing of the sensors with respect to each plant, or plant area, to be monitored and treated.

Abstract: The fuel injection valve is in particular a component of a reservoir fuel injection system and has a valve body and an electric control valve that controls the pressure which prevails in a control pressure chamber and acts at least indirectly on an injection valve member in its closing direction, wherein the control pressure chamber is connected to a high-pressure fuel source and can be connected by the control valve to a discharge chamber in order to open at least one injection opening. The control pressure chamber is embodied in a sleeve-shaped section of an insert piece inserted into the valve body and is connected to an inlet bore in the valve body by means of an annular chamber encompassing the section and a connecting bore provided in the valve body. The connecting bore intersects the inlet bore at an obtuse angle (&agr;) in a region that is offset from the annular chamber in the direction of the longitudinal axis of the valve body.

Abstract: A fuel injector for use in an injector arrangement including a fuel pump having a pump chamber and a spill valve arrangement including a spill valve member which is engageable with a valve seating to control communication between the pump chamber and a low pressure drain. The fuel injector further comprises a valve needle which is engageable with a valve needle seating, a control chamber arranged such that the fuel pressure therein urges the valve needle towards its seating, a control valve arrangement, including a control valve member, for controlling the fuel pressure within the chamber, and an actuator arrangement for controlling movement of the spill valve member and the control valve member. The actuator arrangement comprises a double pole actuator having a first armature which is movable with the spill valve member and a single pole actuator having a second armature which is movable with the control valve member.

Abstract: A method of controlling the injection rate and injection pressure of an electromagnetic fuel injector assembly having a pressure balanced control valve including a solenoid and a valve member subject to the pressures developed by the injector and actuated by the solenoid to close the valve member against the biasing force of a spring. The control valve is supported in a valve bore in the injector body. The valve bore includes a relieved portion. The method includes the step of providing a first level of current to the solenoid for moving the valve member from an open to a closed position allowing the pressure in the injector to rise, providing a reduced level of current to the solenoid at preselected times during the injector event to unbalance the forces acting on the valve member thereby slightly unseating the valve member to regulate the injection pressure and injection rate of the fuel injector and ending current to the solenoid thereby moving the valve member to its open position.

Abstract: A pilot actuated spool valve assembly includes a valve body that defines a first passage, a second passage and a flow passage. A unitary pilot body is at least partially positioned in the valve body and has a first valve seat and a second valve seat. A pilot member is moveable in the pilot body between an up position in which the pilot member closes the first valve seat and a down position in which the pilot member closes the second valve seat. A spool valve member has a control hydraulic surface and is positioned in the valve body. It is moveable between a first position in which the first passage is open to the flow passage, and a second position in which the second passage is open to the flow passage. At least one of the valve body, the pilot body, the pilot member and the spool valve member define a control volume fluidly connected to the first passage when the pilot member is in one of its up position and its down position.

Abstract: A unit fuel injector for delivering fuel to a combustion chamber of direct-injection internal combustion engines, having a pump unit for building up an injection pressure and for injecting the fuel via an injection nozzle into the combustion chamber. A control unit with a control valve that is embodied as an outward-opening A-valve, and a valve actuation unit for controlling the pressure buildup in the pump unit. In order to create a unit fuel injector with a control unit that has a simple design, is small in size, and in particular has a short response time, the valve actuation unit is embodied as a piezoelectric actuator.

Abstract: A fuel injector comprises a valve needle slidable within a bore and engageable with a seating to control the supply of fuel to an outlet opening, an end surface of the valve needle being exposed to the fuel pressure within a control chamber defined, in part, by a piston member moveable under the influence of a piezoelectric actuator. The control chamber may be supplied with fuel under pressure, in use, through a restricted flow path. The piston member may have an effective area exposed to the pressure within the control chamber which is greater than that of the needle.

Abstract: A fuel injection valve for internal combustion engines, having a valve member that is displaceable axially outward counter to a restoring force in a bore of a valve body. On an end toward the combustion chamber, the valve member has a closing head. The closing head protrudes from the bore and forms a valve closing member and on a side toward the valve body has a valve sealing face. The valve closing member cooperates with a valve seat face, disposed on a face end toward the combustion chamber of the valve body. The valve closing member at least one injection opening on the closing head. The injection opening originating at a pressure chamber and outlet opening being covered, in the closing position of the valve member, by the valve body and being uncovered upon an outward-oriented opening stroke. A two-stage hydraulic stroke stop, which limits the opening stroke of the valve member and is embodied as a hydraulic damping chamber with a relief line that can be opened.

Abstract: An injector of intensified fuel injection type is disclosed in which a resin-made sealing member for sealing a clearance between a concave and a boosting piston fitted in the concave for reciprocating movement is protected from deterioration owing to high-pressure impulses occurring in the hydraulically actuating fluid in pressure chamber or in the fuel in the intensified chamber. The sealing member of resin-made O ring 44 prevents leakage of the hydraulically actuating fluid from the pressure chamber 8 to the spring chamber 30 through the clearance 27 between the enlarged concave and the boosting piston 119. A split metal ring 91 is arranged between the relatively sliding surfaces 49a, 49b of the enlarged concave 26 and the boosting piston 119 at any location between the pressure chamber 8 and the O ring 44.

Abstract: A fuel injection valve for internal combustion engines, having a valve member that emerges outward from the valve body. At least two rows of injection ports one above the other are provided on the valve member, in the outward-oriented opening stroke of the valve member the injection parts are uncovered in secession. A two-stage hydraulic stroke stop, which limits the opening stroke travel of the valve member is embodied as a hydraulic damping chamber with openable relief. This relief is effected via at least two polished sections on the valve member which are openable in succession during the opening stroke motion of the valve member. At least one of the polished sections is connected to a low-pressure chamber, via a relief conduit containing a valve.

Abstract: A fuel injection valve, particularly an injection valve for fuel injection equipment of internal combustion engines, having a pump piston that can be activated using a piezoelectric or magnetostrictive actuator for exerting a translatory pump motion. A spray-discharge nozzle with at least one spray-discharge opening is hydraulically connected via a fuel pressure line to the pump piston. The spray-discharge nozzle opens when the fuel pressure produced by the pump piston in the fuel pressure line exceeds a predetermined threshold. In the fuel pressure line, at least one non-return valve is arranged so that it opens in the direction towards the spray-discharge nozzle and closes in the opposite direction.

Abstract: A fuel injector includes an injector body that defines a nozzle outlet, and a needle control chamber that is in fluid communication with a needle control passage. A needle valve member is positioned in the injector body, and has a closing hydraulic surface exposed to fluid pressure in the needle control chamber. The needle valve member is moveable between a first position in which the nozzle outlet is blocked, and a second position in which the nozzle outlet is open. The needle control passage includes a dual flow rate orifice. Hydraulic fluid is displaced into the needle control chamber through the dual flow rate orifice when the needle valve member moves from its second position toward its first position. Hydraulic fluid is displaced out of the needle control chamber through the dual flow rate orifice when the needle valve member moves from its first position toward its second position. A compression spring is operably positioned to bias the needle valve member toward its first position.

Abstract: An improved cam operated, open nozzle, unit injector is disclosed including an injector body formed by a barrel, spring housing, and nozzle and containing a central bore for receiving a variable length plunger assembly mounted for reciprocal movement within the injector body wherein the variable length plunger is formed by an outer plunger and inner plunger combined with a timing plunger, mounted between the inner and outer plungers to form a collapsible timing chamber into which a variable quantity of fuel may be metered and expelled on a cycle by cycle basis to provide a variable effective length to the plunger assembly to cause controlled variation in injection timing based on variation in the timing fluid supplied to the injector and wherein the timing plunger is provided with a radial flange for engaging a stop formed in the injector barrel to hold the timing plunger in a predetermined precise location during metering of timing fluid into the collapsible timing chamber and to render the injector timing i

Abstract: In a pressure-compensated solenoid valve disposed in a passage for controlling communication therethrough a central valve housing part which includes a guide bore with an increased-diameter end section providing for a bore shoulder and a stepped control rod movably disposed in the guide bore and having an increased-diameter end portion received in the increased-diameter guide bore end section and a shoulder disposed opposite the guide bore shoulder so as to define an annular space therebetween, a first housing end part is disposed on the central housing part adjacent said increased-diameter guide bore and has an opening in alignment with the control rod and a second housing end part is disposed on the central housing part opposite the first housing end part and includes biasing means for biasing the control rod onto the opening in the first housing end part for closing the opening and electromagnetic means are provided for retracting the control rod to establish communication through the opening wherein the i

Abstract: The fuel injector includes an injection pump element with electromagnetically actuated control valve body supported therein for the control of the beginning of delivery and the quantity delivered. The injection pump element and the control valve are individually replaceable and the control valve body seats without recoil. A control valve (2), which is arranged with clearance in a stepped hole (19) in a plunger bushing (5) is supported in sealing elements (20). The freedom from recoil is achieved by adaptation of a minimum clearance (46) between an anchor plate (30) and an electromagnetic adjusting device (7), the anchor plate (30) being situated in a liquid-filled damping space (33) and the minimum clearance (46) being optimized as a function of the mass of the moving parts of the control valve (2), the spring stiffness of the control valve seat (25), the geometry of an anchor plate (30) and the viscosity of the fuel in the service temperature range.

Abstract: A gasoline unit injector comprising an outer, electrically conductive bellows, defining a variable volume fluid chamber, for reciprocating a piston within a pressure chamber to increase the fuel pressure in various downstream cavities. Various bellows are disposed within such chambers and are deformable in response to the increased pressure, the bellows are operative to control the rate at which fuel flows out from a metering orifice upon activation of a coil assembly.

Abstract: A piezoelectric control valve, for motor fuel injection via an injection valve, includes a hydraulic play-compensation element inside the control valve on the one side, which automatically compensates for possible changes in length of the reference system as a result of piezoceramic setting actions in the piezoelectric actuator so that, at the same working stroke of the piezoelectric actuator, an identical stroke at the valve is also always ensured. A hydraulic stroke transmission inside the control valve on the other side, provide a valve stroke corresponding to a multiple of the working stroke.

Abstract: In an apparatus for generating pre-injection quantities in unit fuel injectors for Diesel engines, including a pre-injection slide that generates a pronounced pressure intensification for a pre-injection in a pressure chamber closed off with respect to the high-pressure side and opens towards the injection line is slidably supported in a guide bore. The pre-injection slide is exposed to the injection pressure of an element chamber in such a way that after the execution of a partial stroke, which is responsible for the pre-injection quantity, upon further movement the pre-injection pressure chamber is opened toward the element chamber and thereby relieved, and by the ensuing movement of the pre-injection slide until the end of the stroke, a pre-determinable capacity that enables an injection pause is formed.

Abstract: A gasoline unit injector comprising an outer, electrically conductive bellows, defining a variable volume fluid chamber, for reciprocating a piston within a pressure chamber to increase the fuel pressure in various downstream cavities. Various bellows are disposed within such chambers and are deformable in response to the increased pressure, the bellows are operative to control the rate at which fuel flows out from a metering orifice upon activation of a coil assembly.

Abstract: A fuel-injection device in which a nozzle element is directly pressed towards the front face of a guide body for the pump plunger. The guide body is provided with an enlarged slot into which a spring element can be entered from the side, which spring element loads the valve needle of the nozzle element. Thus this injection device can be made more compact than known types and is therefore especially suitable to be used in automotive vehicles.

Abstract: The injection pump includes a pump cylinder, a pump piston moving into it and a hydraulic device for adjusting the instant of injection. The adjusting device has an adjusting cylinder, which is directed parallel to the pump cylinder and is accommodated in the housing of the injection pump, and adjusting piston and a restoring spring and adjusts a control sleeve, which opens the pump piston provided with at least one control recess in the longitudinal direction of the pump piston. This orientation and disposition of the adjusting cylinder effects a space-saving and inexpensive design of the injection pump and improves the precision of adjustment. The adjusting piston and the control sleeve may be directed coaxially and embodied as a single component, as a result of which a further space saving and increase in adjustment precision are attained.

Abstract: An electromagnetic unit fuel injector, of the type having a pump including a pump cylinder and an externally actuated plunger and having a solenoid actuated, control valve for normally controlling the spill, inject, spill cycle during a pump stroke of the plunger, has a mechanical spill arrangement associated with the plunger and cylinder to assist in the spill flow of fuel above a predetermined high speed engine operating condition.

Abstract: A fuel injection apparatus having pre-injection and main injection and associated with Diesel engines is disclosed. A high-pressure injection pump delivers a main injection quantity to a main injection nozzle, and a hydraulic pre-injection auxiliary pump is driven by this same pressure pulse. The pre-injection auxiliary pump includes a stepped piston, comprising a pre-injection piston portion and a driving piston portion, and the stepped piston has as an integral component such as a slide pintle control valve located in an extension of its driving piston portion. This control valve opens the passage to the continuing pressure line and to the main injection nozzle only after a predetermined stroke of the stepped piston has been attained.

Abstract: A fuel injection apparatus for an internal combustion engine having engine cylinders includes a fuel tank, fuel supply pumps and fuel injection units. Each fuel injection unit comprises a cylinder, a plunger reciprocable in the cylinder by the engine, pump chamber defined between the cylinder and the plunger and receiving fuel from the fuel supply pump, an injection nozzle communicating with the pump chamber and a timing port formed in the cylinder. The fuel injection apparatus further includes a timing passage connecting the timing port with the fuel tank and a control valve. The control valve comprises a control chamber, a control valve body movable between the open and closed positions in the control chamber for controlling fuel injection, a spring urging the control valve body towards the closed position and a timing chamber formed adjacent the control chamber in the fuel injection unit for receiving fuel to move the control valve body towards the closed position.

Abstract: A fuel injection system comprises a cam, an injection pump, a delivery valve, an injection pipe, a nozzle holder, and a nozzle. The fuel oil passage in the nozzle holder is reduced in diameter as compared with the inside diameter of the injection pipe, with the ratio F3/F1, or the ratio of the effective flow-passage cross sectional area F3 of the fuel oil passage to that F1 of the injection pipe, ranging from about 0.5 to 0.15, over the length l of the fuel oil passage which is 90 to 30 times the inside diameter of the injection pipe, so that the fluctuation of fuel pressure in the injection pipe is converted to kinetic energy thereby to control abnormalities of fuel injection.