EP1598547A2 - Pumpe-Düse-Einheit - Google Patents
Pumpe-Düse-Einheit Download PDFInfo
- Publication number
- EP1598547A2 EP1598547A2 EP05010741A EP05010741A EP1598547A2 EP 1598547 A2 EP1598547 A2 EP 1598547A2 EP 05010741 A EP05010741 A EP 05010741A EP 05010741 A EP05010741 A EP 05010741A EP 1598547 A2 EP1598547 A2 EP 1598547A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- pump
- nozzle
- control valve
- chamber
- 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- Withdrawn
Links
- 239000000446 fuel Substances 0.000 claims abstract description 29
- 238000002347 injection Methods 0.000 claims abstract description 12
- 239000007924 injection Substances 0.000 claims abstract description 12
- 230000002238 attenuated effect Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 238000005056 compaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Images
Classifications
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- 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
- F02M57/023—Injectors structurally combined with fuel-injection pumps characterised by the pump drive mechanical
-
- 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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/20—Varying fuel delivery in quantity or timing
- F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
- F02M59/366—Valves being actuated electrically
-
- 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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/46—Valves
- F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means
- F02M59/468—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means using piezoelectric operating means
-
- 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
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
-
- 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
- F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
- F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations
Definitions
- the invention relates to a pump-nozzle unit for injection of fuel according to the preamble of the claim 1.
- Pump-nozzle units are in various embodiments Used to precisely direct fuel into an internal combustion engine inject.
- a corresponding pump-nozzle unit is known for example from WO 03/067074, in which a pump via a pressure channel with a nozzle chamber, a Injector is connected.
- a control room is one Control valve hydraulically connected to the pressure channel.
- the pump is driven and compressed by a camshaft the fuel in the pump room, so that the pressure in the Nozzle room is rising.
- a nozzle needle is arranged, the pressure surfaces in the manner that the Nozzle needle is lifted off an assigned sealing seat.
- the nozzle needle is on the sealing seat via a biasing spring biased.
- the pressure in the nozzle chamber is predetermined by the pump Increased time ranges, so that an injection takes place.
- the object of the invention is to provide an improved To provide pump-nozzle unit.
- the object of the invention is achieved by the pump-nozzle unit according to claim 1.
- An advantage of the pump-nozzle unit according to the invention is that less pressure fluctuations in the nozzle chamber be generated and a precise injection is possible. This advantage is achieved in that between the control valve and the pressure channel formed a Vorab horrvolumen is hydraulic via a throttle with the pressure channel connected is.
- the Abjuridrossel between the pressure channel and the control valve arranged.
- the Abêtdrossel in the pressure channel between the nozzle chamber and the control valve arranged.
- a pump throttle the pump chamber and the nozzle chamber In this way, pressure fluctuations between the Pump chamber and the pressure channel damped.
- another in the pressure channel Throttle formed between the nozzle chamber and the pump chamber and the inlet of the control valve is arranged. The Another choke leads to an additional damping of the Pressure channel prevailing hydraulic vibrations.
- control valve hydraulically connected to a drainage channel, wherein the drainage channel is arranged an outlet throttle.
- the diversion throttle a diameter between 0.8 to 2 mm.
- the Vorab capitaraum has a volume of 10-150 mm 3 .
- the figure shows a schematic representation of an injection valve, which is designed according to the pump-nozzle principle is.
- the figure shows schematically the structure of a pump-nozzle unit.
- the pump-nozzle unit is used for supplying fuel in a combustion chamber 1 of an internal combustion engine.
- the pump-nozzle unit has a pump 2, which has a Piston 3, which is guided in a cylinder 4, fuel compacted.
- the piston 3 is directly or indirectly via a not shown camshaft of the internal combustion engine driven.
- In the cylinder 4 is adjacent to the piston 3 a first pressure chamber 5 is formed.
- the first pressure chamber 5 is over a fuel line 6 connected to a control valve 7.
- the control valve 7 serves to the fuel line. 6 either close or with a low pressure area 8 connect to.
- the pressure chamber 5 is also on a second Fuel line 9 with a nozzle chamber 10 in conjunction.
- the fuel line 6 and the second fuel line 9 represent a pressure channel.
- a nozzle needle 11 is arranged, whose Closing surfaces associated with a sealing seat 21.
- the seal seat 21 is between injection holes 12 and the nozzle space 10th arranged.
- the nozzle needle 11 pressure surfaces 13 on.
- the nozzle needle 11 is connected via a pressure pin 14 of a spring element 15 biased to the sealing seat 21.
- the control valve 7 has a closing member 16, the one Valve seat 17 is assigned.
- the closing member 16 is in operative connection with a piezoelectric actuator 18, the is controlled by a control unit 19.
- control valve 7 If the control valve 7 is opened, the piston 3 sucks a suction upward fuel over the low pressure area 8, the control valve 7 and the fuel line 6 in the pressure chamber 5.
- the low pressure area 8 is to with connected to a fuel tank. During a compaction movement of the piston 3 down the fuel is opened Control valve 7 back to the low pressure range 8 pressed.
- the fuel lines, the nozzle chamber 10 and the second fuel line 9 are completely filled with fuel filled.
- the piezoelectric actuator 18 applied voltage evaluated.
- the piezoelectric Actuator 18 is connected via voltage lines 20 from the control unit 19 energized.
- the control unit 19 detected via the voltage lines 20, the piezoelectric actuator 18 voltage applied.
- the control unit 19 thus has both via a voltage source as well as via a voltmeter.
- the control valve 7 is formed in such a way that in the energized State of the piezoelectric actuator 18 the Closing member 16 is lifted from the valve seat 17 and thus the control valve 7 is open.
- a first throttle 23 provided near the valve seat 17, so that between the first throttle 23 and the valve seat 17 a Vorabberichtvolumen 27 is formed.
- a second throttle 24 is formed.
- a third throttle 25 is provided in the second fuel pipe 9 near the nozzle space 10. It is also in one Another preferred embodiment of the valve seat 17 in the low pressure region 8, a fourth throttle 26 is arranged.
- the function of the pilot control volume 27 is to transmit pressure fluctuations, which are generated by the opening and closing of the valve 7, through the first throttle 23 only attenuated to the first and the second fuel line 6, 9. In this way, lower pressure fluctuations in the fuel lines 6, 9 and thus also in the nozzle chamber 10 are generated. Thus, a more stable pressure situation is achieved overall and pressure fluctuations are reduced. Overall, this leads to a lower noise excitation when injecting fuel.
- Preferred values for the diameter of a circular first throttle 23 are in the range of 0.8 to 1.5 mm.
- diameters for the first throttle 23 in the range between 1.1 and 1.3 mm are used.
- the advance control volume 27 is preferably in the range of 10-150 mm 3 .
- the second throttle 24 has the function of pressure fluctuations, which arise in the pressure chamber 5 to damp, so that in the nozzle chamber 10 lower pressure fluctuations than in the pressure chamber 5 prevail.
- the third throttle 25 has the task of pressure fluctuations, the form in the relatively long second fuel line 9, to dampen.
- the fourth throttle 26 has the function of cavitation effects in to avoid the line of the low pressure area 8.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims (6)
- Pumpe-Düse Einheit zum Einspritzen eines Mediums, insbesondere Kraftstoff, mit einer Pumpe (2) mit einem Kolben (3), der an einen Druckraum (5) angrenzt, wobei der Druckraum (5) über einen Druckkanal (6, 9) mit einem Düsenraum (10) einer Einspritzdüse hydraulisch verbunden ist, wobei ein Steuerventil (7) mit einem Schließglied (16) vorgesehen ist, wobei das Schließglied (16) in der geschlossenen Position des Steuerventils den Druckkanal (6, 9) gegenüber einem Niederdruckbereich abdichtet, wobei die Pumpe im Zusammenspiel mit dem Steuerventil (7) den Druck im Düsenraum (10) erhöht, um eine Einspritzung zu starten,
dadurch gekennzeichnet, dass zwischen dem Druckkanal (6, 9) und dem Steuerventil (7) ein Vorabsteuervolumen ausgebildet ist, dass das Vorabsteuervolumen über eine Drossel (23) mit dem Druckkanal (6, 9) hydraulisch verbunden ist, so dass eine Änderung der Schließposition des Steuerventils (7) gedämpft auf den Druckkanal (6, 9) übertragen wird. - Pumpe-Düse-Einheit nach Anspruch 1, dadurch gekennzeichnet, dass die Drossel (23) einen Durchmesser von 0,8 bis 2 mm aufweist.
- Pumpe-Düse-Einheit nach einem der Ansprüche 1 oder 2,
dadurch gekennzeichnet, dass das Vorabsteuervolumen zwischen 10-150 mm3 aufweist. - Pumpe-Düse-Einheit nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, dass zwischen dem Druckraum (5) und dem Druckkanal (6, 9) eine zweite Drossel (24) angeordnet ist. - Pumpe-Düse-Einheit nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, dass im Druckkanal (9) vor dem Düsenraum (10) eine dritte Drossel (25) angeordnet ist. - Pumpe-Düse-Einheit nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, dass zwischen einem Ventildichtsitz (17) des Schließgliedes (16) und einem Niederdruckbereich (8), über den das Medium von der Pumpe in einem Ansaugtakt angesaugt wird, eine vierte Drossel (26) angeordnet ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004024926 | 2004-05-19 | ||
| DE200410024926 DE102004024926A1 (de) | 2004-05-19 | 2004-05-19 | Pumpe-Düse-Einheit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1598547A2 true EP1598547A2 (de) | 2005-11-23 |
| EP1598547A3 EP1598547A3 (de) | 2006-03-15 |
Family
ID=34936631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05010741A Withdrawn EP1598547A3 (de) | 2004-05-19 | 2005-05-18 | Pumpe-Düse-Einheit |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1598547A3 (de) |
| DE (1) | DE102004024926A1 (de) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003067074A1 (de) | 2002-02-07 | 2003-08-14 | Volkswagen Mechatronic Gmbh & Co. Kg | Verfahren und vorrichtung zur ansteuerung eines steuerventils einer pumpe-düse-einheit |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3700355A1 (de) * | 1987-01-08 | 1988-07-21 | Bosch Gmbh Robert | Kraftstoffeinspritzeinrichtung fuer brennkraftmaschinen, insbesondere pumpeduese |
| US6450778B1 (en) * | 2000-12-07 | 2002-09-17 | Diesel Technology Company | Pump system with high pressure restriction |
| DE10121891A1 (de) * | 2001-05-05 | 2002-11-07 | Bosch Gmbh Robert | Kraftstoffeinspritzventil für Brennkraftmaschinen |
| DE10131953A1 (de) * | 2001-07-02 | 2003-01-23 | Siemens Ag | Steuermodul für einen Injektor eines Speichereinspritzsystems |
| DE10155406A1 (de) * | 2001-11-10 | 2003-05-22 | Bosch Gmbh Robert | Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine |
| DE10217592A1 (de) * | 2002-04-19 | 2003-11-06 | Siemens Ag | Injektor zur Einspritzung von Kraftstoff |
| DE10229417A1 (de) * | 2002-06-29 | 2004-01-15 | Robert Bosch Gmbh | Speichereinspritzsystem mit Variodüse und Druckübersetzungseinrichtung |
| DE10237593A1 (de) * | 2002-08-16 | 2004-03-11 | Robert Bosch Gmbh | Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine |
| DE10246208A1 (de) * | 2002-10-04 | 2004-04-15 | Robert Bosch Gmbh | Einrichtung zur Unterdrückung von Druckwellen an Speichereinspritzsystemen |
-
2004
- 2004-05-19 DE DE200410024926 patent/DE102004024926A1/de not_active Withdrawn
-
2005
- 2005-05-18 EP EP05010741A patent/EP1598547A3/de not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003067074A1 (de) | 2002-02-07 | 2003-08-14 | Volkswagen Mechatronic Gmbh & Co. Kg | Verfahren und vorrichtung zur ansteuerung eines steuerventils einer pumpe-düse-einheit |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102004024926A1 (de) | 2005-12-15 |
| EP1598547A3 (de) | 2006-03-15 |
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Legal Events
| Date | Code | Title | Description |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| RIC1 | Information provided on ipc code assigned before grant |
Ipc: F02M 63/00 20060101ALI20060124BHEP Ipc: F02M 59/46 20060101ALI20060124BHEP Ipc: F02M 59/36 20060101ALI20060124BHEP Ipc: F02M 57/02 20060101AFI20050727BHEP |
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| AKX | Designation fees paid |
Designated state(s): DE FR GB IT |
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| 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 |
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| 18D | Application deemed to be withdrawn |
Effective date: 20060916 |