EP1593840A2 - Verfahren und Vorrichtung zur Formung des Einspritzdruckes an einem Kraftstoffinjektor - Google Patents
Verfahren und Vorrichtung zur Formung des Einspritzdruckes an einem Kraftstoffinjektor Download PDFInfo
- Publication number
- EP1593840A2 EP1593840A2 EP05101355A EP05101355A EP1593840A2 EP 1593840 A2 EP1593840 A2 EP 1593840A2 EP 05101355 A EP05101355 A EP 05101355A EP 05101355 A EP05101355 A EP 05101355A EP 1593840 A2 EP1593840 A2 EP 1593840A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- valve
- injection
- fuel
- switching valve
- 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- Withdrawn
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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
- 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
- F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
- F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
- F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
- F02M45/08—Injectors peculiar thereto
- F02M45/086—Having more than one injection-valve controlling discharge orifices
-
- 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
- F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
- F02M45/12—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship providing a continuous cyclic delivery with variable 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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing 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
- 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
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0049—Combined valve units, e.g. for controlling pumping chamber and injection valve
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/46—Valves, e.g. injectors, with concentric valve bodies
-
- 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
- F02M61/161—Means for adjusting injection-valve lift
-
- 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
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
Definitions
- DE 101 23 910.6 relates to a fuel injection device. This is at a Internal combustion engine used.
- the combustion chambers of the internal combustion engine are supplied with fuel via fuel injectors.
- the fuel injectors are acted upon by a high pressure source, further comprising the fuel injector a pressure booster having a movable pressure booster piston.
- the fuel pressure in the high-pressure chamber can be by filling a back space (differential pressure space) of the pressure booster with fuel or by emptying the back space (differential pressure chamber) of the pressure booster of Fuel vary.
- the fuel injector comprises a movable closing piston for Opening or closing of injection openings.
- the closing piston protrudes into a closing pressure chamber into, so that the closing piston can be acted upon by fuel pressure. Thereby a force acting on the closing piston in the closing direction is generated.
- a closing pressure chamber into, so that the closing piston can be acted upon by fuel pressure.
- a force acting on the closing piston in the closing direction is generated.
- the Closing pressure room and another room are shared by a working room formed, with all parts of the working space permanently for the exchange of Fuel are interconnected.
- a storage injection system with Variodüse and pressure booster known.
- a high-pressure fuel source is a fuel injector fueled.
- a pressure amplifier is arranged between an injection valve and the high-pressure fuel source.
- the pressure booster has a booster piston, which a connectable to the high-pressure fuel source pressure chamber of a Nozzle space of the fuel injector acting high pressure chamber separates.
- the fuel injector comprises a nozzle needle, with which a combustion chamber zu lade Injection openings are releasable or closable.
- the nozzle needle comprises a first nozzle needle part and a further, second nozzle needle part, both of which are pressure-dependent controlled, release different injection cross sections at an injection nozzle or close.
- the two nozzle needle parts of the nozzle needle are guided into each other, and have a hydraulic actuation enabling surface.
- the first nozzle needle part a pressure shoulder, which over the entering in a nozzle chamber, operated under high pressure fuel.
- the second nozzle needle part comprises a pressure shoulder, which arranged at the combustion chamber end of the second nozzle needle part is.
- the opening pressure level the inner needle part of the multipart injection valve member can to be set to a constant, high level when spring assisted to open to prevent in the partial load range of the internal combustion engine.
- the Switching valve which may be configured for example as a servo valve, is after the proposed driving method temporarily in a partial opening state. This can be achieved that in a critical pressure range in the high-pressure reservoir (common rail) the injection pressure at the needle parts of a multi-part design Injection valve member can be reduced and in particular an unwanted opening the second, inner needle part of the multipart injection valve member can be safely prevented.
- the fuel injector actuated switching valve before at the multi-part injection valve member of the maximum injection pressure is reached, again disabled for a short period of time.
- the deactivation of the Fuel injector actuated switching valve can also be done several times in succession. During deactivation of the fuel injector actuated switching valve closes this is not complete, but only performs a partial closing movement, so that a Complete closing of the multipart injection valve member is omitted.
- the simple energization of the switching valve can certainly also phases of different high Anstellströme or different high driving voltages include.
- phases of different high Anstellströme or different high driving voltages include.
- connection time i. the opening time of the second, inside Needle part of the multipart injection valve, known exactly and due to determined Maps allow the correct injection amount of fuel into the combustion chamber determine the self-igniting internal combustion engine.
- the fuel injectors operated by the proposed driving method are advantageously designed such that they have a pronounced pressure maximum on Have the beginning of the main injection phase. This allows a particularly good influenceability the maximum occurring injection pressure by a multiple control of a Servo valve of a fuel injector actuated example formable as a solenoid valve Control valve and thereby early connection of the second, inner needle part a multi-part injection valve member.
- the inventive proposed driving method as Switching valve used a servo valve as this is a nearly linear opening and Has closing movement of the servo valve piston.
- the opening and Closing speed of a valve piston in a control valve designed as a servo valve ideally adapt to the requirements.
- the trained as a servo valve Control valve actuated control valve always passes through the multiple energization complete stroke range, which ensures that the control valve is always outside the tolerance sensitive ballistic area, i. operated between his attacks becomes.
- Influencing the injection / pressure curve by multiple activation of the on-off valve such as a servo valve actuating control valve can also at a Fuel injector are used, which is a one-piece injection valve member has to the injection pressure curve in an optimal manner to different operating conditions to adapt to the internal combustion engine. This allows the respective injection pressure curve the internal combustion engine to adapt to map requirements, without that modifications to the on the internal combustion engine design-related respectively used Basic designs of fuel injectors would be required.
- FIG. 1 is a hydraulic circuit diagram of one according to the invention suggested driving method controllable fuel injector to take.
- a pressure accumulator 1 (common rail) is connected to a high pressure line 2 and a Fuel injector 3 connected.
- the fuel injector 3 comprises an injector body 4, the is designed in several parts for easier assembly of the individual components.
- a pressure booster 5 is accommodated.
- the pressure amplifier 5 comprises a first Booster piston part 6 and a second booster piston part 10.
- About the first pressure booster piston part 6 are a working space 8 and a differential pressure chamber 9 (rear space) of the booster 5 separated from each other.
- a Return spring 7 was added.
- the working space 8 of the pressure booster 5 is over the High pressure line 2 loaded with high pressure fuel.
- the pressure level, with which the working space 8 of the booster 5 is applied, depends from the pressure level which prevails in pressure accumulator 1 (common rail) (system pressure).
- the second pressure booster piston part 10 acts with its end face 12 a Compression space 11 of the pressure booster 5.
- a control line 13 From the differential pressure chamber 9 (back space) of the Pressure booster 5 extends a control line 13 to a rear space 14, which a multi-part trained injection valve member acted upon.
- a first throttle point 15 In the control line 13 is a first throttle point 15 is provided.
- a first spring element 16 and a second spring element 17 In the rear space 14 for acting on the multipart Injection valve member are a first spring element 16 and a second spring element 17 recorded.
- the first spring element 16 acts on a first, outer Needle 21 of the multi-part injection valve member, while the second Spring element 17 has a second, inner needle part 22 of the multi-part design Injection valve member acted upon.
- a nozzle chamber 23 is formed.
- the outer, first needle part 21 of the multipart injection valve member comprises a pressure stage 24 which lies within the nozzle chamber 23.
- a pressure stage 25th is located at the second, inside Needle part 22 of the multipart injection valve member on combustion chamber-side end of a pressure stage 25th
- first injection openings 26 are released or closed, while through the inner, second needle part 22 of the multi-part trained injection valve member second injection openings 27 either released or closed.
- first injection openings 26 is provided with a first Injection rate in a not shown in Figure 1 combustion chamber of the internal combustion engine injected, while additionally by the inner, second needle part 22 released second injection openings 27 with a larger injection rate in the Combustion chamber of the self-igniting internal combustion engine can be injected.
- a nozzle chamber inlet 28 extends to the nozzle chamber 23.
- the compressed in the compression chamber 11 fuel is on the Nozzle space inlet 28 is introduced into the nozzle chamber 23 and generates there at the pressure stage 24 of the outer, first needle member 21 acts on this in the opening direction hydraulic power.
- the switching valve 29, which is preferably designed as a servo valve, includes next the first hydraulic chamber 30, a second hydraulic chamber 31. These are connected via a recess 40 in a valve piston 32 with each other.
- a valve piston 32 In the valve piston 32 is a second throttle point 33 below an end face 34 of the valve piston 32nd educated.
- the valve piston 32 is acted upon at the end face 34 via a pressure chamber 35. From pressure chamber 35 extends from a line in which a third throttle point 36 is integrated, to a preferably designed as a solenoid valve control valve 37th
- the control valve 37 connects the pressure chamber 35 of the switching valve 29 with a low-pressure side Return 38.
- the preferred designed as a solenoid valve control valve 37th comprises a valve piston actuated by an electromagnet, with which a valve seat 39 of the control valve 37 can be closed or completely opened.
- the preferably designed as a servo valve switch valve 29 comprises at its end face 35 opposite end of a flat seat, with which a low-pressure chamber closed is connected to a low-pressure side return 41.
- the differential pressure chamber 9 (backspace) of the pressure booster 5 via the switching valve 29 with the same pressure level (system pressure) as the working space 8 of the booster 5 is applied.
- the connection via the return line 41 to the low-pressure region is closed. Therefore the pressure amplifier 5 is pressure balanced and there is no pressure gain instead; the two nozzle needle parts 21, 22 of the multipart injection valve member are located in the deactivated state of the booster 5 in the closed state.
- the differential pressure chamber 9 (back space) of the Pressure booster 5 pressure relieved.
- the differential pressure chamber 9 (Backspace) of the booster 5 via the switching valve 29 from the pressure source, i. the Accumulator 1 (common rail), decoupled and the differential pressure chamber 9 is on the Relief line in the low pressure range pressure relieved.
- This increases the Pressure in the compression chamber 11 of the booster 5, which corresponds to the transmission ratio the booster 5 takes place.
- about the nozzle chamber inlet 28 is this increased pressure to the injection nozzle, i. forwarded into the nozzle chamber 23.
- the rear space 14 of the multipart injection valve member is also depressurized.
- the pressure build-up takes place within a pressure chamber 42, which through the pressure stage 25, the nozzle body and the end face of the first, outer needle part 21 is limited.
- inner needle part 22nd Within a critical system pressure range in the pressure accumulator 1 can be a multiple control the switching valve 29 done.
- control start of the main injection phase which is a pre-injection of under high Pressurized fuel into the combustion chamber of the self-igniting internal combustion engine can be upstream, and before reaching the maximum injection pressure level on combustion chamber side end of the multipart injection valve, the control valve 37 disabled for a short drive break 52.
- the drive pause 52 which is shown in FIG is, can also in multiple succession to the first control phase 51 of the control valve 37 connect.
- the drive pause 52 is followed by a second drive phase 52.
- the Start of the control takes place with respect to the first drive phase 51 to a first Activation time 54 and with respect to the second drive phase 53 at a second drive time 55, as the illustration in Figure 2 can be seen.
- valve piston 32 performs a partial closing movement 61.
- the stroke of the Switching valves is indicated by reference numeral 60.
- the partial closing movement 61 is so measured that there is no significant pressure reduction and therefore no complete Closing a multipart injection valve 21, 22 comes.
- the valve piston 32 of the switching valve 29 dwells in an intermediate position 62, which is shown in Figure 3. This intermediate position 62 takes the valve piston 32 of the control valve 29 during the Driving pause 52 on.
- the tolerance range of the opening pressure P ⁇ , NZ of the opening of the second, inner needle part 22 of the multi-part design Injector valve member determined is indicated in Figure 4 by reference numeral 71.
- the course of the nozzle pressure 70 can be represented by a plateau 72, in dashed lines Lines a pressure increase 73 is superimposed.
- a Single energization i. a single control of the switching valve can certainly Have phases of different high drive currents or drive voltages.
- Solenoid valves formed switching valves is typically, for example, a first short starting current phase with higher current level and another, subsequent thereto Holding current phase used with low current level.
- a Zuschaltzeittician 93 in which the second, inner needle part 22 of the multi-part trained injection valve member opens, is thus known exactly, so that under consideration of corresponding, the injection quantity considering maps the correct injection amount of fuel results.
- the pressure curve 70 in an injection is in Figure 5 in dashed line through a pressure increase 73 indicated.
- the thereby adjusting opening of the second, inside Needle part 22 of the multi-part injection valve member is in Figure 6 indicated by dashed lines.
- the sketched driving method of a multiple control of the control valve 37 for actuation the switching valve 27 can be used particularly advantageously on fuel injectors 3, their basic design by a pronounced maximum pressure at the beginning of the injection is marked. Because of this, there is a good influenceability of the Maximum pressure due to multiple activation and an early activation time 93 of the second, inner needle part 22. Has the second, inner needle part 22 its Opening movement started, the second, inner needle part 22 sets the opening movement by the additional pressure force generated by a pressure stage 25 on the combustion chamber side End of the second, inner needle member 22, even if the nozzle pressure 70 drops again below the opening pressure.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
- Figur 1
- ein hydraulisches Schaltschema eines Kraftstoffinjektors mit Druckverstärker, der mit dem erfindungsgemäß vorgeschlagenen Verfahren betreibbar ist,
- Figur 2
- den Hubverlauf eines Einschaltventil betätigenden Steuerventils, aufgetragen über die Zeit,
- Figur 3
- den Hubverlauf eines Ventilkolbens des Schaltventiles, aufgetragen über die Zeit,
- Figur 4
- den Druckverlauf an einem mehrteilig ausgebildeten Einspritzventilglied,
- Figur 5
- den Hubweg eines ersten, äußeren Nadelteiles eines mehrteilig ausgebildeten Einspritzventilgliedes und
- Figur 6
- den Hubverlauf eines zweiten, innenliegenden Nadelteiles eines mehrteilig ausgebildeten Einspritzventilgliedes.
- 1
- Druckspeicher (common rail)
- 2
- Hochdruckzuleitung
- 3
- Kraftstoffinjektor
- 4
- Injektorkörper
- 5
- Druckverstärker
- 6
- erstes Druckverstärker-Kolbenteil
- 7
- Rückstellfeder
- 8
- Arbeitsraum
- 9
- Differenzdruckraum (Rückraum)
- 10
- zweites Druckverstärker-Kolbenteil
- 11
- Kompressionsraum
- 12
- Stirnfläche
- 13
- Steuerleitung
- 14
- Rückraum Einspritzventilglied
- 15
- erste Drosselstelle
- 16
- erstes Federelement
- 17
- zweites Federelement
- 18
- Zapfen
- 19
- Anschlag
- 20
- Rückschlagventil (Wiederbefüllung)
- 21
- erstes Nadelteil (außenliegend)
- 22
- zweites Nadelteil (innenliegend)
- 23
- Düsenraum
- 24
- Druckstufe
- 25
- Druckstufe zweites Nadelteil
- 26
- erste Einspritzöffnungen
- 27
- zweite Einspritzöffnungen
- 28
- Düsenraumzulauf
- 29
- Schaltventil (Servoventil)
- 30
- erster hydraulischer Raum Schaltventil
- 31
- zweiter hydraulischer Raum Schaltventil
- 32
- Ventilkolben
- 33
- zweite Drosselstelle
- 34
- Stirnfläche Ventilkolben 32
- 35
- Druckraum Schaltventil 29
- 36
- dritte Drosselstelle
- 37
- Steuerventil (Magnetventil)
- 38
- Rücklauf Niederdruck
- 39
- Ventilsitz
- 40
- Ausnehmung
- 41
- weiterer Rücklauf (Niederdruck)
- 42
- Druckraum (spitzes Einspritzventilglied)
- 50
- Hub Steuerventil
- hmax
- Maximalhub
- 51
- erste Ansteuerphase
- 52
- Ansteuerpause
- 53
- zweite Ansteuerphase
- 54
- erster Ansteuerzeitpunkt
- 55
- zweiter Ansteuerzeitpunkt
- 60
- Hub Schaltventil
- 61
- Teilschließbewegung Ventilkolben 32
- 62
- Zwischenstellung Ventilkolben 32
- 70
- Verlauf Düsendruck
- 71
- Toleranzbereich pöffnung; innenliegende Nadel
- 72
- Plateau
- 73
- Drucküberhöhung
- 80
- Hubweg erstes Nadelteil
- 81
- Öffnungszeitpunkt erstes Nadelteil
- 90
- Hubweg zweites Nadelteil
- 92
- Öffnungsbeginn zweites Nadelteil
- 93
- Zuschaltzeitpunkt zweites Nadelteil
Claims (12)
- Verfahren zur Formung des Einspritzverlaufes eines Kraftstoffinjektors (3), welcher über ein mittels eines Steuerventils (37) betätigbaren Schaltventils (29) ansteuerbar ist und welcher einen Druckverstärker (5) zur Erhöhung des Druckniveaus von in einen Brennraum einzuspritzenden Kraftstoff aufweist, wobei der Kraftstoffinjektor (3) ein einteilig oder ein mehrteilig ausgebildetes Einspritzventilglied (21, 22) aufweist und der Druckverstärker (5) durch Druckentlastung oder Druckbeaufschlagung eines Differenzdruckraumes (9) betätigbar ist, wobei ein Arbeitsraum (8) des Druckverstärkers (5) permanent mit der Hochdruckquelle (1) in Verbindung steht, dadurch gekennzeichnet, dass während der Haupteinspritzphase von Kraftstoff in einen Brennraum einer Verbrennungskraftmaschine das das Schaltventil (29) ansteuernde Steuerventil (37) zur Beeinflussung des Einspritzdruckverlaufes ein- oder mehrfach angesteuert wird.
- Verfahren gemäß Anspruch 1, dadurch gekennzeichnet, dass, zwischen einer ersten Ansteuerphase (51) des Steuerventils (37) und einer weiteren Ansteuerphase (53) des Steuerventils (37) mindestens eine Ansteuerpause (52) zwischengeschaltet ist.
- Verfahren gemäß Anspruch 1, dadurch gekennzeichnet, dass während der Ansteuerpause (52) des Steuerventils (37) ein Ventilkolben (32) des Schaltventils (29) eine Zwischenstellung (62) zwischen seiner Öffnungs- und seiner Schließposition einnimmt.
- Verfahren gemäß Anspruch 1, dadurch gekennzeichnet, dass durch die Ansteuerpause (52) des den Kraftstoffinjektor (3) betätigenden Schaltventiles (29) das Spitzendruckniveau am brennraumseitigen Ende eines mehrteilig ausgebildeten Einspritzventilgliedes (21, 22) unter das maximale Druckniveau absinkt.
- Verfahren gemäß Anspruch 1, dadurch gekennzeichnet, dass bei Mehrfachansteuerung des das Schaltventil (29) betätigenden Steuerventils (37) dieses seinen vollständigen Hubweg durchläuft und außerhalb des ballistischen Bereiches zwischen seiner Öffnungs- und seiner Schließstellung (39) betätigt wird.
- Kraftstoffeinspritzeinrichtung zur Durchführung des Verfahrens gemäß einem oder mehrerer der Ansprüche 1-5, dadurch gekennzeichnet, dass der Kraftstoffinjektor 1 ein als Schaltventil (29) ausgebildetes Servoventil aufweist, welches über ein ein- oder mehrfach betätigbares Steuerventil (37) angesteuert wird, welches bei Ein- oder Mehrfachansteuerung außerhalb des ballistischen Bereiches betrieben wird.
- Kraftstoffeinspritzeinrichtung gemäß Anspruch 6, dadurch gekennzeichnet, dass das Schaltventil (29) einen Ventilkolben (32) aufweist, welcher eine eine zweite Drosselstelle (33) enthaltenden Ventilkolben (32) aufweist, über welche ein zweiter hydraulischer Raum (31) und ein Druckraum (35) des Schaltventiles (35) hydraulisch miteinander in Verbindung stehen.
- Kraftstoffeinspritzeinrichtung gemäß Anspruch 6, dadurch gekennzeichnet, dass ein Ventilkolben (32) des als Servoventil ausbildbaren Schaltventils (29) eine einen zweiten hydraulischen Raum (30) und einen ersten hydraulischen Raum (31) verbindende Ausnehmung (40) aufweist, über welche in einer Teilschließposition des Servoventilkolbens (32) ein Kraftstoffvolumen abströmt.
- Kraftstoffeinspritzeinrichtung gemäß Anspruch 6, dadurch gekennzeichnet, dass eine den Differenzdruckraum (9) des Druckverstärkers (5) entlastende Leitung im ersten hydraulischen Raum (30) des Schaltventils (29) mündet.
- Kraftstoffeinspritzeinrichtung gemäß Anspruch 6, dadurch gekennzeichnet, dass ein niederdruckseitiger Rücklauf (41) des Schaltventils (29) über einen der Stirnfläche (34) des Servoventilkolbens (32) gegenüberliegenden Flachsitz freigebbar oder verschließbar ist.
- Kraftstoffeinspritzeinrichtung gemäß Anspruch 6, dadurch gekennzeichnet, dass dieser ein einteilig ausgebildetes Einspritzventilglied (21, 22) umfasst.
- Kraftstoffeinspritzeinrichtung gemäß Anspruch 6, dadurch gekennzeichnet, dass dieser ein mehrteiliges ausgebildetes Einspritzventilglied (21, 22) umfasst.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004022267 | 2004-05-06 | ||
DE102004022267A DE102004022267A1 (de) | 2004-05-06 | 2004-05-06 | Verfahren und Vorrichtung zur Formung des Einspritzdruckes an einem Kraftstoffinjektor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1593840A2 true EP1593840A2 (de) | 2005-11-09 |
EP1593840A3 EP1593840A3 (de) | 2006-06-07 |
Family
ID=34938794
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05101355A Withdrawn EP1593840A3 (de) | 2004-05-06 | 2005-02-23 | Verfahren und Vorrichtung zur Formung des Einspritzdruckes an einem Kraftstoffinjektor |
Country Status (3)
Country | Link |
---|---|
US (1) | US7182070B2 (de) |
EP (1) | EP1593840A3 (de) |
DE (1) | DE102004022267A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106014739A (zh) * | 2016-05-25 | 2016-10-12 | 中国第汽车股份有限公司无锡油泵油嘴研究所 | 一种喷油嘴 |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0215490D0 (en) * | 2002-07-04 | 2002-08-14 | Delphi Tech Inc | Control valve arrangement |
DE10352736A1 (de) * | 2003-11-12 | 2005-07-07 | Robert Bosch Gmbh | Kraftstoffinjektor mit direkter Nadeleinspritzung |
DE102004022268A1 (de) * | 2004-05-06 | 2005-12-01 | Robert Bosch Gmbh | Ansteuerverfahren zur Beeinflussung der Öffnungsgeschwindigkeit eines Steuerventiles an einem Kraftstoffinjektor |
DE102004028521A1 (de) * | 2004-06-11 | 2005-12-29 | Robert Bosch Gmbh | Kraftstoffinjektor mit mehrteiligem Einspritzventilglied und mit Druckverstärker |
EP1836385B1 (de) * | 2004-12-03 | 2010-12-29 | Ganser-Hydromag AG | Brennstoffeinspritzventil mit druckverstärkung |
JP4305394B2 (ja) * | 2005-01-25 | 2009-07-29 | 株式会社デンソー | 内燃機関用燃料噴射装置 |
DE602006000822T2 (de) * | 2006-03-15 | 2009-03-05 | Delphi Technologies, Inc., Troy | Verbesserte Steuerventilanordnung |
DE102008016662A1 (de) | 2008-04-01 | 2009-10-15 | Continental Automotive Gmbh | Verfahren und Einrichtung zum Einspritzen von Kraftstoff in einen Kraftfahrzeugmotor |
US7578283B1 (en) | 2008-06-30 | 2009-08-25 | Caterpillar Inc. | System for selectively increasing fuel pressure in a fuel injection system |
CN104847553A (zh) * | 2015-04-09 | 2015-08-19 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | 可优化喷油速率且可增压式共轨喷油器 |
RU2613009C1 (ru) * | 2015-12-04 | 2017-03-14 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Московский автомобильно-дорожный государственный технический университет (МАДИ)" | Электрогидравлическая форсунка для дизеля |
US11105307B2 (en) * | 2017-02-03 | 2021-08-31 | Transportation Ip Holdings, Llc | Method and systems for a multi-needle fuel injector |
DE102018214135A1 (de) * | 2018-08-22 | 2020-02-27 | Robert Bosch Gmbh | Verfahren zur Ansteuerung eines Injektors |
GB2592961B (en) | 2020-03-12 | 2022-11-02 | Perkins Engines Co Ltd | Cylinder cut-out modes for engines |
US20240141856A1 (en) * | 2022-11-02 | 2024-05-02 | Ron Kukler | High-pressure fuel injection system |
Citations (2)
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DE10123939A1 (de) | 2001-05-17 | 2003-01-09 | Bayerische Motoren Werke Ag | Abdeckung für ein Fahrzeugschloss |
DE10229417A1 (de) | 2002-06-29 | 2004-01-15 | Robert Bosch Gmbh | Speichereinspritzsystem mit Variodüse und Druckübersetzungseinrichtung |
Family Cites Families (13)
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US5651345A (en) * | 1995-06-02 | 1997-07-29 | Caterpillar Inc. | Direct operated check HEUI injector |
US5711277A (en) * | 1995-08-29 | 1998-01-27 | Isuzu Motors Limited | Accumulating fuel injection apparatus |
US6085726A (en) * | 1998-05-20 | 2000-07-11 | Navistar International Transportation Corp. | Fuel injector |
US6499467B1 (en) * | 2000-03-31 | 2002-12-31 | Cummins Inc. | Closed nozzle fuel injector with improved controllabilty |
DE10247903A1 (de) * | 2002-10-14 | 2004-04-22 | Robert Bosch Gmbh | Druckverstärkte Kraftstoffeinspritzeinrichtung mit innenliegender Steuerleitung |
US7032574B2 (en) * | 2003-03-24 | 2006-04-25 | Sturman Industries, Inc. | Multi-stage intensifiers adapted for pressurized fluid injectors |
DE10325620A1 (de) * | 2003-04-02 | 2004-10-14 | Robert Bosch Gmbh | Servoventilangesteuerter Kraftstoffinjektor mit Druckübersetzer |
US7320310B2 (en) | 2003-04-02 | 2008-01-22 | Robert Bosch Gmbh | Fuel injector provided with provided with a pressure transmitter controlled by a servo valve |
DE10315015B4 (de) * | 2003-04-02 | 2005-12-15 | Robert Bosch Gmbh | Kraftstoffinjektor mit Druckverstärker und Servoventil mit optimierter Steuermenge |
DE10328245A1 (de) * | 2003-06-24 | 2005-01-13 | Robert Bosch Gmbh | Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen |
DE102004017305A1 (de) * | 2004-04-08 | 2005-10-27 | Robert Bosch Gmbh | Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen mit direkt ansteuerbaren Düsennadeln |
DE102004022270A1 (de) * | 2004-05-06 | 2005-12-01 | Robert Bosch Gmbh | Kraftstoffinjektor für Verbrennungskraftmaschinen mit mehrstufigem Steuerventil |
DE102004028521A1 (de) * | 2004-06-11 | 2005-12-29 | Robert Bosch Gmbh | Kraftstoffinjektor mit mehrteiligem Einspritzventilglied und mit Druckverstärker |
-
2004
- 2004-05-06 DE DE102004022267A patent/DE102004022267A1/de not_active Withdrawn
-
2005
- 2005-02-23 EP EP05101355A patent/EP1593840A3/de not_active Withdrawn
- 2005-05-06 US US11/123,067 patent/US7182070B2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10123939A1 (de) | 2001-05-17 | 2003-01-09 | Bayerische Motoren Werke Ag | Abdeckung für ein Fahrzeugschloss |
DE10229417A1 (de) | 2002-06-29 | 2004-01-15 | Robert Bosch Gmbh | Speichereinspritzsystem mit Variodüse und Druckübersetzungseinrichtung |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106014739A (zh) * | 2016-05-25 | 2016-10-12 | 中国第汽车股份有限公司无锡油泵油嘴研究所 | 一种喷油嘴 |
CN106014739B (zh) * | 2016-05-25 | 2018-05-18 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | 一种喷油嘴 |
Also Published As
Publication number | Publication date |
---|---|
EP1593840A3 (de) | 2006-06-07 |
US7182070B2 (en) | 2007-02-27 |
DE102004022267A1 (de) | 2005-12-01 |
US20050252490A1 (en) | 2005-11-17 |
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