EP2410168A1 - Distributeur de fluide et procédé de préparation d'un fluide de travail à l'aide d'un distributeur de fluide - Google Patents

Distributeur de fluide et procédé de préparation d'un fluide de travail à l'aide d'un distributeur de fluide Download PDF

Info

Publication number
EP2410168A1
EP2410168A1 EP11162069A EP11162069A EP2410168A1 EP 2410168 A1 EP2410168 A1 EP 2410168A1 EP 11162069 A EP11162069 A EP 11162069A EP 11162069 A EP11162069 A EP 11162069A EP 2410168 A1 EP2410168 A1 EP 2410168A1
Authority
EP
European Patent Office
Prior art keywords
fluid
control
pressure
delivery
working
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11162069A
Other languages
German (de)
English (en)
Inventor
Turhan Yildirim
Leif Knipstrom
Andreas Carelli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wartsila NSD Schweiz AG
Original Assignee
Wartsila NSD Schweiz AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wartsila NSD Schweiz AG filed Critical Wartsila NSD Schweiz AG
Priority to EP11162069A priority Critical patent/EP2410168A1/fr
Publication of EP2410168A1 publication Critical patent/EP2410168A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0003—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/02—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 of valveless type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/02—Injectors structurally combined with fuel-injection pumps
    • F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
    • F02M57/025—Injectors structurally combined with fuel-injection pumps characterised by the pump drive hydraulic, e.g. with pressure amplification
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/3809—Common rail control systems
    • F02D41/3836—Controlling the fuel pressure
    • F02D41/3863—Controlling the fuel pressure by controlling the flow out of the common rail, e.g. using pressure relief valves

Definitions

  • the invention relates to a fluid dispenser, and a method for providing a working fluid by means of a fluid dispenser according to the independent claim of the respective category
  • common rail fuel injection systems for accumulating high pressure fuel and an injector for injecting the high pressure fuel are off DE-A-103 48 404 or EP-A-2 133 540 known.
  • the object of the present invention is to provide an apparatus and a method for periodically expelling a working fluid at ejection intervals during which the pressure of the working fluid can be adjusted in a time-dependent manner, for example for injecting a fuel into a combustion chamber of an internal combustion engine, one of the prior art better dosage of injection quantity, thus one much better heat release depending on the duration of injection should be possible.
  • the invention thus relates to a fluid dispenser for providing a working fluid
  • the fluid dispenser comprises a delivery cylinder with a delivery piston arranged therein, which divides the delivery cylinder into a control chamber and a delivery chamber.
  • the control chamber is acted upon via a control input with a control fluid under a predefinable control pressure such that the working fluid provided in the delivery chamber via an inflow opening is available at a discharge opening at a predeterminable working pressure.
  • a pressure relief device is provided, so that the working pressure of the working fluid at the outflow opening can be modulated in a time-dependent manner according to a predeterminable scheme.
  • the pressure relief means is directly or indirectly, for example via a line connected to the control chamber of the delivery cylinder, wherein the pressure relief means in another embodiment may also be connected alternatively or simultaneously with the delivery chamber. That is, the time-dependent modulation of the working pressure of the working fluid can be made both by relieving the control pressure in the control room or simultaneously or alternatively by relieving the working pressure in the pumping chamber.
  • the pressure relief means for example, simply a pressure relief opening on the control chamber and or on the delivery chamber
  • the Pressure relief means preferably a passive or actively controllable throttle and / or a valve, in particular a controllable valve is.
  • the delivery piston of the delivery cylinder is particularly preferably a stepped piston, in particular in the form of a pressure booster piston, as it is known in principle from the prior art.
  • the pressure relief means in practice is a controllable pressure relief means, wherein particularly advantageously a control device is provided with which the pressure relief means can be controlled and / or regulated.
  • the fluid dispenser is a fluid dispenser for a fuel injector of an internal combustion engine or a fluid dispenser for a lubricating oiler for lubricating a cylinder wall of a cylinder of an internal combustion engine.
  • the invention further relates to an internal combustion engine with a fluid dispenser of the invention, wherein the internal combustion engine is preferably a two-stroke large diesel engine for a ship.
  • the inventive device thus serves in practice to provide a preferably periodic ejection of a working fluid, wherein during a discharge interval of the working pressure of the working fluid is time-dependent adjustable.
  • the fluid dispenser according to the invention is in practice advantageously connectable to a pressure booster pump, a rechargeable battery or a storage tank for providing a working fluid under a flow pressure, wherein the flow pressure is preferably between 1 and 20 bar. Particularly preferred is a flow pressure of 1 to 10 bar.
  • the booster pump advantageously takes the working fluid from a reservoir.
  • the booster pump is connected via first connecting means to a pressure booster piston.
  • the delivery cylinder is, as is known, a device which has two usually cylindrical chambers, in each of which a movable piston, namely a control piston portion and a delivery piston portion is formed.
  • the two cylindrical chambers expediently have a coaxial longitudinal axis.
  • the two pistons are mechanically coupled or loose (under double-sided pressure as coupled), that upon displacement of a piston results in a synchronous longitudinal movement of the two pistons.
  • the two cylindrical chambers and thus also their pistons have different cross-sectional areas, so that a control chamber and a delivery chamber is formed.
  • the two pistons can be moved back and forth in the respective fluid chambers, wherein the pistons on the lateral surfaces expediently have sealing means which seal the fluid chambers against the outside.
  • the space possibly lying between the control piston section and a delivery piston section may be filled with gas or filled with fluid, or the control piston section and the delivery piston section together form the stepped piston, in particular the pressure boosting piston, as a compact body.
  • the delivery chamber is filled in the operating state with the working fluid and the control chamber with the control fluid. Controlled pressure change in the control fluid can thus cause a corresponding, synchronous movement of the control piston section and the delivery piston section along the common fluid chamber longitudinal axis.
  • the booster pump is thus connected via preferred first connecting means with the delivery chamber of the delivery cylinder.
  • the first connection means contain a valve (control or check valve), because on the one hand the delivery chamber is loaded by the first connection means with working fluid, on the other hand working fluid is ejected from the pumping chamber pressure modulated through the discharge opening of the pumping chamber, wherein the ejected working fluid can have very high pressure peaks.
  • the delivery chamber of the delivery cylinder is thus with a below a Steady pressure standing working fluid filled and then the working fluid is ejected under time modulated pressure from the pumping chamber. Therefore, the presence of a valve, preferably a check valve or control valve is mandatory in many cases, so that during the expulsion of the working fluid from the pumping chamber can not be pushed back into the (filling) line.
  • this can be used to control the filling of the pumping chamber. This would also define the injection quantity as a function of the degree of filling.
  • bonding agent in the present text includes either tubular or tubular connecting means for conducting fluids such as gases or liquids, which gases or liquids may be under high pressure.
  • the delivery chamber has a discharge opening for the working fluid under temporally modulated working pressure.
  • the control chamber of the delivery cylinder is preferably connected on the one hand via a first control valve with a high-pressure pump for a control fluid and possibly with an accumulator as a storage medium for the high-pressure control fluid by means of second connecting means.
  • the control chamber of the delivery cylinder may be further connected to a second throttle or a controllable throttle and / or a further control valve for reducing the pressure of the control fluid located in the control chamber by means of third connecting means.
  • the device further comprises a control unit for metering the injection quantity and for controlling the pressure intensifier piston and the first and second control valves such that the time-dependent predetermined course of the working pressure of the working fluid at the outflow opening of the delivery chamber of the delivery cylinder during the ejection intervals is adjustable.
  • the first and second control valves are preferably 3/2-way valves, wherein at least one control valve can also be designed as a 2/2-way valve.
  • at least one control valve can also be designed as a 2/2-way valve.
  • a 2/2-way valve only a normal passage takes place, i. There is an on or off.
  • an additional connection is additionally available, for example for pipe venting.
  • the first and / or the second control valve may also include a plunger as a moving element.
  • the device between the first control valve and the pressure booster piston at least one throttle / adjustable throttle for regulating the flow rate of the control fluid. This allows, for example, a gentler increase in the control pressure of the control fluid in the control room.
  • the device between the second control valve and the pressure booster piston at least one throttle for regulating the outflow of the control fluid from the control chamber of the delivery cylinder. This allows, for example, a gentler, i. less abrupt pressure drop in the control room.
  • the throttles are preferably also controlled by the control unit, which is also required for the control of the control valves.
  • the inventive device is particularly suitable for injecting a fuel into the combustion chamber of a reciprocating internal combustion engine, in particular in the combustion chamber of a large diesel engine.
  • the invention further relates to a method for providing a working fluid by means of a fluid dispenser, wherein the fluid dispenser comprises a delivery cylinder with a delivery piston arranged therein, so that the delivery cylinder is subdivided into a control chamber and a delivery chamber.
  • the control chamber is acted upon via a control input in such a way with a control fluid under a predetermined control pressure that the working fluid provided in the delivery chamber via an inflow opening is made available at a discharge opening under a predetermined working pressure.
  • a pressure relief means is provided, so that the working pressure of the working fluid at the outflow opening can be modulated in a time-dependent manner according to a predetermined scheme.
  • a controllable pressure relief means is provided as pressure relief means, wherein in particular for the metering of the working fluid, the speed of the delivery piston is controlled and / or regulated by the controllable pressure relief means.
  • the working fluid can be provided by the fluid dispenser periodically in successive work cycles, and for dosing the working fluid in a given power stroke can advantageously be a working parameter of a previous power stroke used, for example, a piston speed of the delivery piston from a previous power stroke can be used.
  • a working fluid is preferably pre-compressed by means of a booster pump and fed in particular to a stroke- or path-controlled pressure booster piston. Thereafter, the working fluid is ejected particularly advantageously controlled or regulated during an ejection interval from the pressure booster piston, wherein the pressure booster piston is actuated by a control fluid with time-controlled control pressure.
  • the working pressure of the working fluid can be adjusted in a time-dependent manner in a range from 0 to 3000 bar, preferably 0-2000 bar.
  • each ejection interval includes a pre-ejection pulse, a main ejection pulse, and a post-ejection pulse, with the pre-and post-ejection pulses being preferred to the main ejection pulse of short duration.
  • the duration of the pre- and post-ejection pulses is preferably between 2 and 20 percent of the pulse duration of the main ejection pulse.
  • the working pressure of the working fluid can also be modulated in time during an ejection pulse.
  • the time-modulated compression of the working fluid can be accomplished by a control fluid at a pressure of 5 to 1000 bar.
  • the control fluid is supplied in a preferred embodiment of the pressure intensifier piston through a first control valve for the controlled supply of control fluid in the piston side remote from the working fluid of the pressure booster piston, i. into the control room of the delivery cylinder.
  • the control fluid in the control chamber of the delivery cylinder is preferably controlled or regulated relieved of pressure by a second control valve.
  • the actuation of the control valves and possibly existing additional throttles is done advantageously by means of an electronic control unit.
  • the working fluid and the control fluid may have the same chemical composition.
  • the working fluid and / or the control fluid may be an oil, water, a fuel or a gas (liquid / gaseous).
  • the working fluid is a fuel, wherein the fuel is injected into a combustion chamber of a reciprocating internal combustion engine.
  • the pressure-modulated working fluid is supplied to an injection nozzle and fed via a manifold of a throttle and then an expansion space of a control piston and at the same time the annular space of a Nadelhubvorides to a controlled opening and closing operation of the needle element in a Nadelhubvorraum cause.
  • the actuator piston can also be acted upon by working fluid, closed / controlled.
  • the device according to the invention permits pre-injection and post-injection, adjustment of variable pressure during the injection process, accurate metering of injection quantity, very small pressure drop from the intensifier piston to the injector, a fast injection end and a variable injection quantity during the injection period, i. a variable injection rate.
  • the fluid dispenser 1 for providing a working fluid 2 comprises a delivery cylinder 3 with a delivery piston 4 arranged therein, which divides the delivery cylinder 3 into a control chamber 5 and a delivery chamber 6.
  • the control chamber 5 is acted upon via a control input 7 with a control fluid 8 under a specifiable control pressure PS such that the working fluid 2 provided in the delivery chamber 6 via an inlet 9 is available at a discharge opening 10 at a predeterminable working pressure PA.
  • a pressure relief means 11 is provided, which in the present simple example is simply a thin discharge channel 11 acting as a throttle, so that the working pressure PA of the working fluid 2 at the outflow opening 10 can be modulated in a time-dependent manner according to a predeterminable scheme 12.
  • Fig. 2 shows a second simple embodiment of a fluid dispenser 1 according to the invention for providing the standing at the discharge opening 10 of the delivery cylinder 3 under the variable working pressure PA working fluid 2, the working pressure PA and fluid quantity is variable and adjustable in time over a predetermined time interval.
  • the delivery piston 4, 41 is designed as a pressure booster piston 41 with a control piston section 411 and a delivery piston section 412, so that the control pressure PS applied to the control piston section 411 can be amplified in a manner known per se to the working pressure PA.
  • the fluid dispenser 1 is connected to a booster pump 80 for providing the working fluid 2 under a supply pressure via a first connection means 85 to the delivery chamber 6 of the delivery cylinder 3.
  • the first connecting means 85 also includes a check valve 70.
  • the delivery chamber 6 has, as already mentioned, an output 10 for the standing under the temporally modulated working pressure PA working fluid 2.
  • the delivery chamber 6 of the delivery cylinder 3 is cyclically filled with the working fluid 2 under flow pressure. Thereafter, the working fluid 2 is ejected in each case under high, time-modulated pressure from the delivery chamber 6 via the outflow opening 10.
  • the delivery chamber 6 has two cylindrical chambers into which the control piston section 411 and the delivery piston section 412 of the delivery piston 4, 41 are respectively arranged.
  • the two cylindrical chambers have a coaxial longitudinal axis wherein the control piston portion 411 and the delivery piston portion 412 are mechanically coupled so that upon displacement of the control piston portion 411 along the longitudinal axis, a synchronous longitudinal movement of the delivery piston portion 412 results.
  • the two cylindrical chambers and the control piston portion 411 reciprocable therein and the delivery piston portion 412 have different cross-sectional areas, so that the smaller delivery chamber 6 and the larger control chamber 5 are formed.
  • the control piston section 411 and the delivery piston section 412 preferably have sealing devices, eg sealing rings or labyrinth seals, on their lateral surfaces, which engage in Fig. 2 are not shown for reasons of clarity.
  • the control chamber 5 of the delivery cylinder 3 is connected on the one hand via a first control valve 30 with a high-pressure pump 10 for the control fluid 8, and an accumulator 20 for the high-pressure control fluid 8 by means of a second connection means 15.
  • the connecting means 15, 85 are preferably each made of tubes or reinforced, pressure-resistant hoses.
  • the control chamber 5 of the delivery cylinder 3 with a designed as a second control valve pressure relief means 11 for reducing the pressure in the control chamber. 5 located control fluid 8 by means of a third connecting means 45.
  • the fluid dispenser 1 is also signal-connected to a control unit 60 for controlling the delivery piston 4, 41, and the first and second control valves 30, 40, 11.
  • the control valve 40 is in Fig. 2 and Fig. 3 at the same time the pressure relief means 11.
  • the time-dependent predetermined course of the working pressure PA of the working fluid 2 at the discharge opening 10 of the delivery chamber 6 of the delivery cylinder 3 depends directly on the pressure profile in the control chamber 5 of the delivery cylinder 3, wherein the pressure booster piston 41 is controlled by the control unit 60 ,
  • the control of the pressure booster piston 41 is preferably carried out by inlet and outlet throttling of the control chamber 5 by the control valves 30, 40, 11.
  • the adjustable throttles 32, 42 among other things, the speed of the delivery piston 4, 41 can be influenced.
  • the control unit 60 is used in particular for metering the injection quantity, for example, when the inventive fluid dispenser 1 is used in a fuel injection system of a reciprocating internal combustion engine, in which one measures a stroke of the delivery piston 4, 41. If the stroke of the delivery piston 4, 41 is differentiated by time, the piston speed of the delivery piston 4, 41 is known to be obtained. The thus determined piston speed of the delivery piston 4, 41 can then be used to regulate the piston speed in the next injection.
  • the working fluid 2 as well as the control fluid 8 may be any liquid or gaseous medium.
  • the fluid dispenser 1 is used for a working fluid 2 of water, fuel or oil.
  • the control fluid 8 may be the same fluid as the working fluid 2, or may be different from the working fluid 2.
  • the fluid dispenser 1 may comprise two separate fluid circuits, or the chemical composition of the working fluid 2 and the control fluid 8 may be different.
  • the subsystem of the working fluid 2 comprises a reservoir 75, a booster pump 80, first connecting means 85 containing a check valve 70, and the delivery chamber 6 of the delivery cylinder 3 with output 10 for the temporally variable with respect to fluid quantity and fluid pressure working fluid.
  • the subsystem of the control fluid 8 comprises a reservoir 500, a high pressure pump 100, an accumulator 20, the second connecting means 15, and the control chamber 5 of the delivery cylinder 3, as well as the first control valve 30 and between the control chamber 5 and the high pressure pump 100 and the accumulator 20 connected to the control chamber 5 pressure relief means 11, which is designed as the second control valve 11.
  • the designed as a second control valve pressure relief means 11 is used for controlled pressure reduction or pressure relief in the control chamber 5, i. for the derivation of control fluid 8 from the control chamber. 5
  • control fluid 8 derived from the pressure relief device 11 that is to say the control fluid 8 derived from the second control valve, is fed back into the reservoir 75 for the working fluid 2.
  • Fig. 3 schematically shows a further embodiment of an inventive fluid dispenser 1 for a fuel injection in a diesel engine, preferably for a two-stroke large diesel engine.
  • the device according to Fig. 3 contains in addition to the in Fig. 2 described components, nor a connected via a at the output 10 of the delivery chamber 6 of the delivery cylinder 3 safety valve 95 connected
  • Injection valve 93 of an internal combustion engine the safety valve 95 is connected on the one hand with a return line 86 via the first connecting means 85 with the booster pump 80, respectively the check valve 70 and on the other hand connected by a line 87 to the output 10 of the delivery chamber 6 of the delivery cylinder 3.
  • the injection valve 93 is connected either to an output line of the safety valve 95 or directly to the supply line 87.
  • a conventional injection valve 93 may also be an electronically controlled and provided with a solenoid valve injection valve 97 are used.
  • the fuel is supplied via the supply line 94 directly to the combustion chamber of the internal combustion engine.
  • the high-pressure pump 10 and the accumulator 20 deliver a control fluid, here diesel fuel, with a pressure between 5 and 500 bar.
  • the pressure booster piston 41 increases the pressure in the injection system 93, 97 to the desired injection pressure in the ratio of the cross sections of the Steuerbolbenabschniits 411 and the delivery piston section 412.
  • the pressure in the accumulator 20 and the area ratios of the control piston portion 411 to the delivery piston portion 412 are selected according to the intended, highest injection pressure.
  • the actual injection pressure depends on the pressure at the control piston portion 411 of the pressure booster piston 41, which is throttled controlled by the control valves 30, 40, 11 and the throttles 32, 42 in the inflow and outflow of the control fluid 8.
  • Such a control of the two control valves 30, 40, 11 and throttles 32, 42 allows a gentler increase in the injection pressure compared with the prior art, the regulation of the injection pressure during injection and an interruption of the injection (pre- or post-injection).
  • the control of the throttles 32, 42 can take place via a control or control valve 30, 40, 11 (flow control valve).
  • the stroke of the valve can for example be controlled by means of a magnet or a voice coil valve.
  • the first control valve 30 combines with the second Control valve 40, 11 intensifies the reaction force of the pressure booster piston 41 and shortens its reaction time.
  • One of the control valves 30, 40, 11 can be designed as a 2/2-way valve.
  • the fuel quantity to be injected is filled via the check valve 70 with a flow pressure of 1 to 10 bar through the low-pressure pump 80.
  • the valve 95 is a safety valve, which prevents the flow of fuel into the combustion chamber of the internal combustion engine when the nozzle needle is left open.
  • the conventional injection valve 93 or the electronically controlled and provided with a solenoid valve injection valve 97 is used with the control unit 98. The latter has the advantage that the injection can be stopped independently of the piston movement and very quickly, which reduces the smoke formation of the HC and NOx emissions of the engine.
  • Fig. 4 shows a schematic representation of a curve of the working pressure PA during an ejection interval of the working fluid 2 at the discharge opening 10 of the delivery chamber 6 of the delivery cylinder 3.
  • the abscissa time t is plotted and the ordinate the working pressure PA at the discharge opening 10 of the delivery cylinder.
  • 3 Fig. 4 shows a predetermined scheme 12 of an ejection interval with three ejection pulses, namely a pre-ejection pulse V, a main ejection pulse H and a post-ejection pulse N.
  • the pre- and post-ejection pulses V, N have only a short pulse duration.
  • the working pressure PA rises very steeply, remains constant for a short time and then drops steeply again.
  • the main ejection pulse shows a modulated over the pulse duration curve of the working pressure PA.
  • Fig. 4 shows three exemplary pressure curves during the main ejection pulse of predetermined Impulsinature.
  • the solid line shows a steep but steady pressure rise to a maximum value, the latter remaining substantially constant over a period of time before the pressure then drops back to zero.
  • the dashed line course of the working pressure PA shows a steady increase in the working pressure PA to a point in time at which the working pressure PA steep falls, ie there is no constant value of the working pressure PA over a certain period of time.
  • the dotted line shows a modulated course of the working pressure PA, at which the working pressure PA first continuously increases again, then drops to an intermediate value continuously and steadily rises again to a maximum, before the main ejection pulse H then steeply, but continuously drops to zero ,
EP11162069A 2010-07-23 2011-04-12 Distributeur de fluide et procédé de préparation d'un fluide de travail à l'aide d'un distributeur de fluide Withdrawn EP2410168A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP11162069A EP2410168A1 (fr) 2010-07-23 2011-04-12 Distributeur de fluide et procédé de préparation d'un fluide de travail à l'aide d'un distributeur de fluide

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP10170602 2010-07-23
EP11162069A EP2410168A1 (fr) 2010-07-23 2011-04-12 Distributeur de fluide et procédé de préparation d'un fluide de travail à l'aide d'un distributeur de fluide

Publications (1)

Publication Number Publication Date
EP2410168A1 true EP2410168A1 (fr) 2012-01-25

Family

ID=42936356

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11162069A Withdrawn EP2410168A1 (fr) 2010-07-23 2011-04-12 Distributeur de fluide et procédé de préparation d'un fluide de travail à l'aide d'un distributeur de fluide

Country Status (7)

Country Link
US (1) US20120017874A1 (fr)
EP (1) EP2410168A1 (fr)
JP (1) JP2012026445A (fr)
KR (1) KR20120011777A (fr)
CN (1) CN102345543A (fr)
BR (1) BRPI1103472A2 (fr)
RU (1) RU2011125552A (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2533957T3 (es) * 2010-08-25 2015-04-16 Basf Se Pistola pulverizadora para la expulsión de un fluido
PL2709775T3 (pl) 2011-05-18 2016-04-29 Basf Se Urządzenie i sposób opróżniania i przepłukiwania pojemników napełnionych płynem
CN103670580B (zh) * 2013-11-29 2015-09-16 南车玉柴四川发动机股份有限公司 一种大功率柴油机的机油系统
AU2015294772B2 (en) 2014-07-21 2019-10-10 Patent Agencies Limited A filler machine
KR102439058B1 (ko) * 2017-12-14 2022-08-31 바르실라 핀랜드 오이 피스톤 엔진용 유체 분배 엘리먼트 및 그러한 유체 분배 엘리먼트를 구비한 피스톤 엔진
US11964290B2 (en) 2018-09-12 2024-04-23 Smc Corporation Compressed-fluid discharge control device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19734354A1 (de) * 1997-08-08 1999-02-11 Mtu Friedrichshafen Gmbh Kraftstoffeinspritzsystem für eine Brennkraftmaschine
EP0982492A2 (fr) * 1998-08-28 2000-03-01 Wärtsilä NSD Schweiz AG Dispositif d'injection de combustible dans un moteur à combustion interne à piston alternatif
EP1247978A2 (fr) * 2001-04-06 2002-10-09 Mtu Friedrichshafen Gmbh Système d'injection de carburant pour un moteur à combustion interne
DE10348404A1 (de) 2002-10-18 2004-04-29 Denso Corporation, Kariya Kraftstoffeinspritzsystem mit Akkumulator
US20070175448A1 (en) * 2005-12-22 2007-08-02 Shinogle Ronald D Fuel injector with selectable intensification
EP2133540A1 (fr) 2007-03-05 2009-12-16 Yanmar Co., Ltd. Dispositif de commande d'injection de carburant pour moteur diesel

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE33270E (en) * 1982-09-16 1990-07-24 Bkm, Inc. Pressure-controlled fuel injection for internal combustion engines
DE19939429A1 (de) * 1999-08-20 2001-03-01 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung
DE10065103C1 (de) * 2000-12-28 2002-06-20 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung
JP4125963B2 (ja) * 2001-05-17 2008-07-30 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング 燃料噴射装置
DE10158951A1 (de) * 2001-12-03 2003-06-12 Daimler Chrysler Ag Mit Druckübersetzung arbeitendes Einspritzsystem
EP1613856B1 (fr) * 2003-04-02 2008-07-09 Robert Bosch Gmbh Injecteur de carburant comportant un transmetteur de pression commande par une soupape asservie
DE102004017305A1 (de) * 2004-04-08 2005-10-27 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen mit direkt ansteuerbaren Düsennadeln
US7568633B2 (en) * 2005-01-13 2009-08-04 Sturman Digital Systems, Llc Digital fuel injector, injection and hydraulic valve actuation module and engine and high pressure pump methods and apparatus
SE529810C2 (sv) * 2006-04-10 2007-11-27 Scania Cv Ab Insprutningsorgan för en förbränningsmotor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19734354A1 (de) * 1997-08-08 1999-02-11 Mtu Friedrichshafen Gmbh Kraftstoffeinspritzsystem für eine Brennkraftmaschine
EP0982492A2 (fr) * 1998-08-28 2000-03-01 Wärtsilä NSD Schweiz AG Dispositif d'injection de combustible dans un moteur à combustion interne à piston alternatif
EP1247978A2 (fr) * 2001-04-06 2002-10-09 Mtu Friedrichshafen Gmbh Système d'injection de carburant pour un moteur à combustion interne
DE10348404A1 (de) 2002-10-18 2004-04-29 Denso Corporation, Kariya Kraftstoffeinspritzsystem mit Akkumulator
US20070175448A1 (en) * 2005-12-22 2007-08-02 Shinogle Ronald D Fuel injector with selectable intensification
EP2133540A1 (fr) 2007-03-05 2009-12-16 Yanmar Co., Ltd. Dispositif de commande d'injection de carburant pour moteur diesel

Also Published As

Publication number Publication date
RU2011125552A (ru) 2012-12-27
JP2012026445A (ja) 2012-02-09
KR20120011777A (ko) 2012-02-08
BRPI1103472A2 (pt) 2012-12-11
US20120017874A1 (en) 2012-01-26
CN102345543A (zh) 2012-02-08

Similar Documents

Publication Publication Date Title
EP1125046B1 (fr) System d'injection de carburant pour un moteur à combustion interne avec un multiplicateur de pression
EP0685646B1 (fr) Dispositif d'injection de combustible pour moteurs à combustion interne
EP0946830B1 (fr) Systeme d'injection de carburant pour moteur a combustion interne
DE10002270C1 (de) Ventil zum Steuern von Flüssigkeiten
DE10158950C2 (de) Verfahren, Computerprogramm, Steuer- und Regelgerät zum Betreiben einer Brennkraftmaschine, sowie Brennkraftmaschine
EP2410168A1 (fr) Distributeur de fluide et procédé de préparation d'un fluide de travail à l'aide d'un distributeur de fluide
WO2004003376A1 (fr) Injecteur de carburant a multiplicateur de pression a reduction de pression rapide lors de l'injection
EP3221572A1 (fr) Double injecteur de carburant
EP0694123A1 (fr) Systeme d'injection
EP1552137B1 (fr) Dispositif de suppression d'ondes de pression sur un systeme d'injection a accumulation
EP0064146B1 (fr) Système d'injection pour injecter deux combustibles par une seule buse d'injection
DE19860672A1 (de) Kolbenpumpe zur Kraftstoffhochdruckerzeugung
WO2013174601A1 (fr) Injecteur d'un système d'injection de carburant
DE112011101887T5 (de) Nockenunterstütztes Common-Rail-Brennstoffsystem mit geringer Leckage, Brennstoffeinspritzvorrichtung und Betriebsverfahren dafür
EP2156050B1 (fr) Système d'amplification de pression pour au moins un injecteur de carburant
DE10139055A1 (de) Verfahren, Computerprogramm, Steuer- und/oder Regelgerät sowie Kraftstoffsystem für eine Brennkraftmaschine
DE2509068C2 (fr)
EP1370764B1 (fr) Procede pour injecter du carburant dans les chambres de combustion d'un moteur a combustion interne et systeme d'injection de carburant destine a un tel moteur
EP0946829B1 (fr) Systeme d'injection de carburant destine a un moteur a combustion interne
DE10023960A1 (de) Kraftstoffeinspritzvorrichtung für eine Brennkraftmaschine
EP1392965B1 (fr) Amplificateur de pression pour systeme d'injection de carburant
EP2835526A1 (fr) Agencement de vannes pour une installation d'alimentation en carburant et installation d'alimentation en carburant
DE102015205586B3 (de) Hochdruckeinspritzvorrichtung für einen Verbrennungsmotor
DE4425339C2 (de) Einspritzsystem
EP1483499A1 (fr) Systeme pour moduler en pression le comportement d'injection

Legal Events

Date Code Title Description
AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20120726