EP1456525B1 - Kraftstoffeinspritzeinrichtung für eine brennkraftmaschine - Google Patents
Kraftstoffeinspritzeinrichtung für eine brennkraftmaschine Download PDFInfo
- Publication number
- EP1456525B1 EP1456525B1 EP02805245A EP02805245A EP1456525B1 EP 1456525 B1 EP1456525 B1 EP 1456525B1 EP 02805245 A EP02805245 A EP 02805245A EP 02805245 A EP02805245 A EP 02805245A EP 1456525 B1 EP1456525 B1 EP 1456525B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- control
- space
- fuel injection
- pressure
- fuel
- 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.)
- Expired - Lifetime
Links
- 238000002347 injection Methods 0.000 title claims description 86
- 239000007924 injection Substances 0.000 title claims description 86
- 239000000446 fuel Substances 0.000 title claims description 72
- 238000002485 combustion reaction Methods 0.000 title claims description 18
- 230000033001 locomotion Effects 0.000 claims description 6
- 239000002828 fuel tank Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000004033 diameter control Methods 0.000 description 1
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
- 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
- F02M57/00—Fuel-injectors combined or associated with other devices
- F02M57/02—Injectors structurally combined with fuel-injection pumps
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
-
- 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
- F02M2200/28—Details of throttles in fuel-injection apparatus
Definitions
- the invention is based on a Fuel injection device for an internal combustion engine according to the preamble of claim 1.
- a second one electrically actuated control valve provided by the a connection of a control pressure chamber with a Relief space is controlled.
- the control pressure chamber is over a throttle point connected to the pump working space.
- Of the Control pressure chamber is limited by a control piston, which on the injection valve member in its closing direction supported and by the ruling in the control pressure chamber Pressure in the closing direction of the injection valve member is charged.
- To a fuel injection is the first control valve closed and the second control valve open, so that in the control pressure chamber no high pressure can build and can open the fuel injector. With open second control valve, however, flows from the Pump working space via the control pressure chamber fuel off, so that is available for injection Amount of fuel pumped by the pump piston Fuel quantity is reduced and also for the Injection available pressure is reduced. It follows that the efficiency of Fuel injector is not optimal and the Course of the fuel injection not in the desired Way can be set.
- FIG. 1 shows a Fuel injection device for an internal combustion engine in a longitudinal section in a simplified representation
- Figure 2 a designated in Figure 1 with II section in enlarged view with a control piston in one first stroke position
- Figure 3 the detail II with the Control piston in a second stroke position.
- FIG. 1 to 3 is a Fuel injection device for an internal combustion engine a motor vehicle shown.
- the internal combustion engine is preferably a self-igniting internal combustion engine.
- the Fuel injection device is preferably as So-called pump-nozzle unit is designed and has for each cylinder of the internal combustion engine one each High-pressure fuel pump 10 and connected to this Fuel injection valve 12, which has a common Form building unit.
- the Fuel injection device as a so-called pump-line-nozzle system be trained in which the High-pressure fuel pump and the fuel injection valve each cylinder is arranged separately from each other and over a line are connected together.
- the High-pressure fuel pump 10 has a pump body 14 with a cylinder bore 16 in which a pump piston 18th is tightly guided, at least indirectly by a Cam 20 of a camshaft of the internal combustion engine opposite the force of a return spring 19 in a lifting movement is driven.
- the pump piston 18 limited in the Cylinder bore 16 a pump working chamber 22, in the at Delivery stroke of the pump piston 18 Fuel under high pressure is compressed.
- the pump working chamber 22 becomes fuel from a fuel tank 24 of the motor vehicle fed.
- the fuel injection valve 12 has one with the Pump body 14 connected valve body 26, the may be formed in several parts, and in the one Injection valve member 28 in a bore 30th is guided longitudinally displaceable.
- the valve body 26 indicates its the combustion chamber of the cylinder of the internal combustion engine facing end region at least one, preferably a plurality Injection openings 32.
- the injection valve member 28 has at its the combustion chamber end facing a For example, about conical sealing surface 34, which with one in the valve body 26 in the combustion chamber facing End region formed valve seat 36 cooperates, from or after which the injection openings 32 dissipate.
- valve body 26 is between the injection valve member 28 and the bore 30 to the valve seat 36 toward an annular space 38th present, in its the valve seat 36 facing away End region by a radial extension of the bore 30 in a pressure chamber 40 surrounding the injection valve member 28 passes.
- the injection valve member 28 has the height of the Pressure chamber 40 by a cross-sectional reduction a Pressure shoulder 42 on.
- a biased closing spring 44 through the injection valve member 28 in its closing direction is pressed toward the valve seat 36.
- the closing spring 44 is arranged in a spring chamber 46 of a housing part 50, the adjoins the valve body 26.
- the spring chamber 46 is by a bore 30 in the valve body 26 coaxial Hole formed in the housing part 50.
- a further coaxial bore 52 with For example, smaller diameter than the diameter of Spring chamber 46, in which a control piston 60 tightly guided is, which is supported on the injection valve member 28.
- a control pressure chamber 62nd limited in the bore 52 is in the spring chamber 46 facing away from End region by the control piston 60.
- the control piston 60 is supported by a opposite to this smaller diameter piston rod 61 am Injection valve member 28 from. That the injection valve member 28th facing end of the piston rod 61 projects from one of them End in the sleeve 48 and can in addition to this be guided.
- the closing spring 44 surrounds the piston rod 61 and is supported on the one hand on the Sleeve 48, and thus indirectly on the injection valve member 28, and, on the other hand, one at the junction of the Spring chamber bore 46 to the smaller diameter Control pressure space bore 62 formed annular shoulder adjacent spring plate 64 from.
- connection 76 to a discharge space 24 from, through a first electrically operated control valve 78 controlled becomes.
- the control valve 78 may be as shown in FIG be designed as a 2/2-way valve.
- the connection 74 of Control pressure chamber 62 with the discharge space 24 is through controlling a second electrically operated control valve 80, which can be designed as a 2/2-way valve.
- the Control valves 78, 80 may be an electromagnetic actuator or have a piezoelectric actuator and are by a electronic control device 82 controlled.
- the control piston 60 assumes its stroke position according to Figure 2, in the between the pin 66 and the mouth 56 of the channel 74th only a small flow area is released, so that a throttle point with a smaller flow area than that of the throttle bore 75 is formed. From the through The pump piston 18 funded fuel can thus only a small subset of the throttle point between the Pin 66 and the mouth 56 through the channel 74 and the opened second control valve 80 in the discharge chamber 24th flow out.
- the second control valve 80 is closed, so that the control pressure chamber 62 separated from the discharge chamber 24 is.
- the first control valve 78 remains in its closed position.
- In the control pressure chamber 62 is building while high pressure as in the pump working chamber 22, so that on the control piston 60, a large pressure force in the closing direction acts and the injection valve member 28 in his Closed position is moved.
- the control piston 60 then takes its stroke position according to Figure 3 a.
- the second Control valve 80 opened by the controller 82.
- the Fuel injection valve 12 then opens as a result of reduced pressure force on the control piston 60 and the Injector member 28 moves above its maximum Opening stroke in its open position.
- the Opening movement of the injection valve member 28 is initially the flow area of the throttle bore 75 as the smallest Flow area effective because between the pin 66 of the control piston 60 and the mouth 56 of the channel 74 a large Flow area is released. This will be a quick opening of the fuel injection valve 12 allows, since the throttle bore 75 with a relatively large Flow area can be formed.
- the second Control valve 80 by the controller 82 in his closed switch position brought so that the Control pressure chamber 62 is separated from the discharge chamber 24 and builds up in this high pressure and on the on the Control piston 60 acting force the fuel injection valve 12 is closed.
- the Injector member 28 is inserted through the control piston 60 large flow area between the pin 66 and the mouth 56 is released, so that the pressure in Control pressure chamber 62 rises rapidly and on the control piston 60 a high pressure force acts, so that the Fuel injection valve 12 closes quickly.
- the second control valve 80 again opened by the controller 82, so that due to the reduced pressure in the control pressure chamber 62 the Fuel injection valve 12 opens.
- the second control valve 80 is closed and / or the first control valve 78 is opened.
Landscapes
- 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)
Description
Claims (6)
- Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine mit einer Kraftstoffhochdruckpumpe (10) und einem mit dieser verbundenen Kraftstoffeinspritzventil (12) für jeden Zylinder der Brennkraftmaschine, wobei die Kraftstoffhochdruckpumpe (10) einen durch die Brennkraftmaschine in einer Hubbewegung angetriebenen Pumpenkolben (18) aufweist, der einen Pumpenarbeitsraum (22) begrenzt, dem Kraftstoff aus einem Kraftstoffvorratsbehälter (24) zugeführt wird, wobei das Kraftstoffeinspritzventil (12) einen mit dem Pumpenarbeitsraum (22) verbundenen Druckraum (40) und ein Einspritzventilglied (28) aufweist, durch das wenigstens eine Einspritzöffnung (32) gesteuert wird, das von dem im Druckraum (40) herrschenden Druck beaufschlagt gegen eine Schließkraft in Öffnungsrichtung (29) zur Freigabe der wenigstens einen Einspritzöffnung (32) bewegbar ist, mit einem ersten Steuerventil (78), durch das eine Verbindung (76) des Pumpenarbeitsraums (22) mit einem Entlastungsraum (24) gesteuert wird und mit einem zweiten Steuerventil (80), durch das eine Verbindung (74) eines Steuerdruckraums (62) des Kraftstoffeinspritzventils mit einem Entlastungsraum (24) gesteuert wird, wobei der Steuerdruckraum (62) zumindest mittelbar eine Verbindung (62) mit dem Pumpenarbeitsraum (22) aufweist, in der eine erste Drosselstelle (73) vorgesehen ist, wobei der Steuerdruckraum (62) durch einen Steuerkolben (60) begrenzt ist, der auf das Einspritzventilglied (28) in einer Schließrichtung wirkt, wobei in der Verbindung (74) des Steuerdruckraums (62) mit dem Entlastungsraum (24) eine zweite Drosselstelle (75) mit festem Durchflußquerschnitt vorgesehen ist, wobei der Steuerkolben (60) mit seiner dem Einspritzventilglied (28) abgewandten Seite (66) einen Durchflußquerschnitt aus dem Steuerdruckraum (62) zu der Verbindung (74) zum Entlastungsraum (24) abhängig vom Hub des Steuerkolbens (60) derart steuert, und wobei mit zunehmendem Öffnungshub des Einspritzventilglieds (28) durch den Steuerkolben (60) ein geringerer Durchflußquerschnitt freigegeben wird, dadurch gekennzeichnet daß bei maximalem Öffnungshub des Einspritzventilglieds (28) der freigegebene Durchflußquerschnitt geringer ist als der Durchflußquerschnitt der zweiten Drosselstelle (75).
- Kraftstoffeinspritzeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Steuerkolben (60) an seiner dem Einspritzventilglied (28) abgewandten Seite einen Zapfen (66) aufweist, mit dem der Steuerkolben (60) bei geöffnetem Einspritzventilglied (28) in eine Mündung (56) der Verbindung (74) des Steuerdruckraums (62) mit dem Entlastungsraum (24) eintaucht und daß zwischen dem Zapfen (66) und der Mündung (56) der Durchflußquerschnitt durch den Steuerkolben (60) gesteuert wird.
- Kraftstoffeinspritzeinrichtung nach Anspruch 2, dadurch gekennzeichnet, daß der Zapfen (66) und die Mündung (56) der Verbindung (74) jeweils zumindest annähernd kegelförmig ausgebildet sind.
- Kraftstoffeinspritzeinrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Steuerdruckraum (62) in einer Bohrung (52) in einem Gehäuseteil (50) der Kraftstoffeinspritzeinrichtung ausgebildet ist und daß die erste Drosselstelle (73) und die zweite Drosselstelle (75) als Drosselbohrungen in diesem Gehäuseteil (50) ausgebildet sind.
- Kraftstoffeinspritzeinrichtung nach Anspruch 4, dadurch gekennzeichnet, daß sich an die den Steuerdruckraum (62) bildende Bohrung (52) im Gehäuseteil (50) eine weitere, einen Federraum (46) bildende Bohrung anschließt, in der eine zumindest mittelbar auf das Einspritzventilglied (28) wirkende, zur Erzeugung der Schließkraft dienende Schließfeder (44) angeordnet ist, wobei der Steuerdruckraum (62) vom Federraum (46) durch den Steuerkolben (60) getrennt ist.
- Kraftstoffeinspritzeinrichtung nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß die Kraftstoffhochdruckpumpe (10) und das Kraftstoffeinspritzventil (12) eine gemeinsame Baueinheit bilden und daß das Gehäuseteil (50) zwischen einem Pumpenkörper (14) der Kraftstoffhochdruckpumpe (10) und einem Ventilkörper (26) des Kraftstoffeinspritzventils (12) angeordnet ist.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10160264A DE10160264A1 (de) | 2001-12-07 | 2001-12-07 | Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine |
| DE10160264 | 2001-12-07 | ||
| PCT/DE2002/004139 WO2003054375A1 (de) | 2001-12-07 | 2002-11-12 | Kraftstoffeinspritzeinrichtung für eine brennkraftmaschine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1456525A1 EP1456525A1 (de) | 2004-09-15 |
| EP1456525B1 true EP1456525B1 (de) | 2005-11-16 |
Family
ID=7708453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02805245A Expired - Lifetime EP1456525B1 (de) | 2001-12-07 | 2002-11-12 | Kraftstoffeinspritzeinrichtung für eine brennkraftmaschine |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6953157B2 (de) |
| EP (1) | EP1456525B1 (de) |
| JP (1) | JP2005513332A (de) |
| DE (2) | DE10160264A1 (de) |
| PL (1) | PL367446A1 (de) |
| WO (1) | WO2003054375A1 (de) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10259950A1 (de) * | 2002-12-20 | 2004-07-01 | Robert Bosch Gmbh | Steuerventil für Injektoren, insbesondere Common-Rail-Injektoren von Brennkraftmaschinen |
| DE10352504A1 (de) * | 2003-11-11 | 2005-06-02 | Robert Bosch Gmbh | Einspritzdüse |
| DE102004010759A1 (de) * | 2004-03-05 | 2005-09-22 | Robert Bosch Gmbh | Common-Rail Injektor |
| DE102005014180A1 (de) * | 2005-03-29 | 2006-10-05 | Robert Bosch Gmbh | Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine |
| FI122557B (fi) * | 2009-04-02 | 2012-03-30 | Waertsilae Finland Oy | Mäntämoottorin polttoaineenruiskutusjärjestely |
| JP6015398B2 (ja) * | 2012-12-05 | 2016-10-26 | 株式会社日本自動車部品総合研究所 | 燃料噴射弁 |
| DE102014225412A1 (de) * | 2014-12-10 | 2016-06-16 | Robert Bosch Gmbh | Kolbenpumpe mit einem Kolben mit profilierter Kolbenvorderseite |
| WO2018098308A1 (en) * | 2016-11-22 | 2018-05-31 | Cummins Inc. | Injector method of switching between injection state and drain state |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3900762A1 (de) * | 1989-01-12 | 1990-07-19 | Voest Alpine Automotive | Kraftstoffeinspritzduese mit hohlem ausweichkolben |
| DE19624001A1 (de) * | 1996-06-15 | 1997-12-18 | Bosch Gmbh Robert | Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen |
| DE19743669A1 (de) * | 1997-10-02 | 1999-04-08 | Bosch Gmbh Robert | Ventil zum Steuern von Flüssigkeiten |
| GB9820237D0 (en) | 1998-09-18 | 1998-11-11 | Lucas Ind Plc | Fuel injector |
| DE19939445A1 (de) * | 1999-08-20 | 2001-03-01 | Bosch Gmbh Robert | Injektor |
| DE10006111A1 (de) * | 2000-02-11 | 2001-08-30 | Bosch Gmbh Robert | Kraftstoffeinspritzventil |
-
2001
- 2001-12-07 DE DE10160264A patent/DE10160264A1/de not_active Withdrawn
-
2002
- 2002-11-12 PL PL02367446A patent/PL367446A1/xx unknown
- 2002-11-12 EP EP02805245A patent/EP1456525B1/de not_active Expired - Lifetime
- 2002-11-12 WO PCT/DE2002/004139 patent/WO2003054375A1/de not_active Ceased
- 2002-11-12 DE DE50204980T patent/DE50204980D1/de not_active Expired - Lifetime
- 2002-11-12 US US10/470,350 patent/US6953157B2/en not_active Expired - Fee Related
- 2002-11-12 JP JP2003555061A patent/JP2005513332A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| PL367446A1 (en) | 2005-02-21 |
| DE50204980D1 (de) | 2005-12-22 |
| US6953157B2 (en) | 2005-10-11 |
| US20040065751A1 (en) | 2004-04-08 |
| EP1456525A1 (de) | 2004-09-15 |
| DE10160264A1 (de) | 2003-06-18 |
| JP2005513332A (ja) | 2005-05-12 |
| WO2003054375A1 (de) | 2003-07-03 |
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