EP0775821B1 - Verfahren und Vorrichtung zum Einspritzen von Brennstoff bei einer Hubkolbenbrennkraftmaschine - Google Patents
Verfahren und Vorrichtung zum Einspritzen von Brennstoff bei einer Hubkolbenbrennkraftmaschine Download PDFInfo
- Publication number
- EP0775821B1 EP0775821B1 EP95810733A EP95810733A EP0775821B1 EP 0775821 B1 EP0775821 B1 EP 0775821B1 EP 95810733 A EP95810733 A EP 95810733A EP 95810733 A EP95810733 A EP 95810733A EP 0775821 B1 EP0775821 B1 EP 0775821B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- injection
- fuel
- cylinder
- accordance
- nozzle
- 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
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
-
- 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
- F02M51/00—Fuel-injection apparatus characterised by being operated 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
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
- F02M59/08—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by two or more pumping elements with conjoint outlet or several pumping elements feeding one engine cylinder
Definitions
- the invention relates to a method for injecting Fuel in a reciprocating piston internal combustion engine according to the preamble of claim 1.
- the invention relates a device operated according to the inventive method.
- FR-967 693 A is an injection system for one Four-cylinder diesel engine known, which two fuel nozzles for each cylinder, two Fuel pumps and a common control shaft with Cams which the fuel pumps alternate actuate.
- FR-840 465 A discloses an internal combustion engine an injection system that has two fuel nozzles for each Cylinder and a rotary valve includes the Alternatively, fuel through the fuel nozzles in the Inject the combustion chamber of the cylinder.
- EP 0 586 775 A which forms the closest prior art, describes a method for injection of fuel in a diesel engine known.
- the fuel is made up of two Injectors staggered in time into the combustion chamber injected by first a first injector is opened and later a second injector opened while the first injector is still open becomes.
- the injection nozzles have closing springs closed nozzle needles, the Closing springs dimensioned differently and / or are biased.
- This known method has the disadvantages of The interval and the sequence of the injection are fixed and that in the combustion chamber a high, uneven Thermal stress or a burn (corrosion, Abrasion) arises.
- the invention has for its object a method for injecting fuel into the combustion chamber To improve cylinders.
- the Sequence of control of the injection nozzles changed, so that during a first injection process the an injector is opened, and in one subsequent injection first another Injector is opened.
- the order of Injection in the subsequent working cycles can to be exchanged cyclically.
- the main advantages of the invention are therein see that by controlling the mass flow of Fuel favorably influenced the cylinder pressure curve is to achieve a better efficiency that in Combustion chamber and especially on the cylinder cover more uniform temperature load is generated. Thereby areas with very high temperature loads on Cylinder covers and pistons, so-called "hot spots", avoided, resulting in corrosion or abrasion Metal removal caused on the cylinder cover or piston is prevented. Because of the deeper maximum A temperature in the combustion chamber is also required less strong cooling. Another advantage of Avoiding areas with high thermal loads to see that the combustion chamber components like Less cylinder cover, piston or cylinder insert area tends to crack.
- In the combustion chamber of a cylinder of a diesel engine are two or more injection nozzles arranged. These injectors are made by one Control device controlled so that the Injection process of the different injectors of a cylinder at different times begin and that during subsequent Injection processes the order of activation of the Injector is varied.
- the object of the invention is further with Device for carrying out the method for injecting fuel in a combustion chamber of a cylinder of a two-stroke reciprocating piston internal combustion engine according to the Characteristics of the Claim 5 solved.
- a multi-cylinder, not shown, slow-running 2-stroke reciprocating internal combustion engine that is operated according to the diesel process, is in Fig. 1st indicated a cylinder 44 in which a working piston 45 is guided up and down.
- the working piston 45 limited together with one to cylinder 44 mounted cylinder cover 46 a combustion chamber 43, in the by means of a first injector 1a and a second Injector 1b liquid fuel is injected.
- the first Injector 1a and the second injector 1b from on known design each have a nozzle needle 7, which under the action of a closing spring 8 against one Seat 1 'is pressed.
- a blind hole is arranged in the nozzle housing, of which Spray holes 2 open, which open into the combustion chamber 43.
- the injection phase of the injector 1a, 1b is the pressure of the pressure chamber via line 9a, 9b 10 supplied fuel so high that the Closing force of the spring 8 is overcome and the Nozzle needle 7 is lifted off the seat 1 ', so that the fuel through the spray holes 2 in the Combustion chamber 43 arrives.
- a line 42 is connected, which is for discharge of leak fuel.
- the injectors 40a, 40b are designed such that the beginning and the End of the injection process via an electrical Control line 41a, 41b is controllable.
- the Injector 40a, 40b can also be such be designed so that the amount of fuel to be injected via an electric Control line 46a, 46b can be controlled.
- the Injectors 40a, 40b are both one Fuel feed line 47a, 47b connected.
- a Control device controls via control lines 41a, 41b and possibly existing control lines 46a, 46b the injectors 40a, 40b and thus that Opening and closing the valves 1a, 1b.
- the Control device is via an electrical signal line 50b connected to a sensor 52 which detects the angle of rotation ⁇ of the crankshafts 53 of the reciprocating piston internal combustion engine supervised.
- the control device 50 has a electrical signal line 50a with an input and Output device 51 connected to which control values can be specified and status values can be displayed.
- Fig. 2 shows a top view of the cylinder cover 46 with arranged injection nozzles 1a, 1b. From the spray holes 2 the fuel emerges in the direction of the radiation Arrows A. In the combustion chamber 43, when the air flows in and when moving the working piston 45 one Swirl flow of the combustion air (arrow B) is generated. When the fuel burns, the cylinder cover 46 and piston 45 areas with increased temperature arise as indicated by area 46c. Such areas 46c can be relatively high Warm temperature when the injectors are uniform can be controlled, and the hottest gases on the ground the swirl flow constantly the same area 46c is fed.
- the Control device 50 controls the injectors 40a, 40b and thus the nozzles 1a, 1b in such a way that for Example of successive injection processes alternately, nozzle 1a or nozzle 1b first is opened and later the further nozzle 1a, 1b.
- the variation of the sequence of the control of the nozzles 1a, 1b can be done in a variety of ways. For example, it is also possible to use two in a row following injections, the nozzle 1a first to open, and in the following two Injection processes to open the nozzle 1b first.
- FIG. 4c shows a further variant of a Nozzle control, in which case three nozzles 1a, 1b, 1c are arranged in the cylinder cover 46, which the Inject fuel into combustion chamber 43.
- the nozzle 1a open a crankshaft angle of 0 °, later or with a larger crankshaft angle the nozzle 1b switched on, and with an even larger one Crankshaft angle, the nozzle lc switched on, at a crankshaft angle of 20 ° all nozzles 1a, 1b, 1c be switched off at the same time.
- FIG. 4c is the total of all nozzles 1a, 1b, 1c in the Combustion chamber 43 injected mass flow of fuel in Function of the crank angle shown.
- the injector 40a, 40b can be such be designed so that the amount injected Fuel can be controlled so that with the Control device 40 both switching on and off Nozzles 1a, 1b, 1c as well as the total mass flow Fuel can be controlled and regulated.
- Fig. 3 shows a further embodiment of a Injector and an injector 1a.
- the Injection nozzle 1a has a nozzle needle 7 with one on it attached piston 64.
- a spring 65 presses the Nozzle needle 7 in a closed position.
- a Injector 60 leads via a line 61 pressurized fuel, which in the Pressure chamber 10 arrives, a pressure on the piston 64 generated, and thereby raises the nozzle needle 7, so that the Fuel at the spray holes 2 as exiting Rays A can escape.
- the embodiment of the lifting of the nozzle needle 7 partially or completely prevented by one piezoelectric actuator 66.
- the actuator 66 is of the control device 50 via a control line 41a controlled.
- the actuator 66 is in particular with Pulse width modulated signals can be controlled so that the Actuator consisting of a plurality of piezoelectric layers very precisely with high Speed is controllable.
- the opening of the Nozzle needle 7, its lifting speed and the stroke the nozzle needle 7 is precise in time, precisely and quickly controllable.
- the control device 50 includes one Electronics for the time control as well as the Flow rate of the injector 1a over the Piezo element 66 and the position of the To regulate nozzle needle 7.
- FIG. 5 shows schematically and partially in a section an embodiment of an injection device 40a, which is fed with fuel by a high-pressure pump 80 and an accumulator 81.
- the input channel 67 for the fuel branches into the channel 68 to the rear of the metering piston 70, which is designed as a differential piston, and into the main channel 69, with which fuel is guided via the groove 141 of the control piston 100 to the input channel section 123.
- the control valve 91 of the control hydraulics 90 which has an inlet and a return, is actuated with control oil that is under pressure, the end face 143 of the control piston 100 is moved downward.
- the pilot valve receives its control commands from the control electronics 50, which ensures that the fuel injection process takes place at the right time and with the right amount.
- the angle signals are transmitted to the control device 50 by a sensor 52 arranged at the crankshaft 3 via an electrical connection 50b.
- An encoder 73 which works, for example, inductively, emits signals about the position of the metering piston 70 to the control electronics 50 by monitoring the position of the shaft 74. This makes it possible to determine and change the fuel injection quantity per injection process.
- the connection between the main channel 69 and the input channel section 123 is first interrupted. Thereafter, the output channel 124 is connected to the injection channel 9a, which leads to the injection nozzle 1a of the cylinder 44 of the diesel engine, via the groove 142 in the control piston 100.
- the metering piston 70 is moved by the pressure exerted by the fuel on the back 68 of the metering piston through the channel 68.
- the fuel is injected into the cylinder space 43. If the pilot valve 91 is closed and the return line for the control oil is opened, the control piston 100 is pressed upward by the fuel pressure acting on the end face 144 of the control piston 100 and the spring force.
- the fuel supply to channel 9a is interrupted and the end of injection is brought about. 5, the second injection nozzle 1b opening into the combustion chamber 43 is only indicated.
- This injection nozzle 1b is supplied with fuel by a further injection device 40b which is identical to the injection device 40a but is not shown.
- five seal on the control piston 100 Sealing points constantly against themselves under high pressure located fuel.
- the most important sealing point namely the one with the connection to the injection nozzle 1a, is designed as a seat valve 145, so that between line 9a during the individual injection processes is put under pressure.
- the valve seat 145 is in the closed state very tight. So that can uncontrolled injection can be prevented.
- Both other seals 146 will the tight fit of the Spool 100 exploited and a small leakage current of the fuel accepted and over the Return channels 127 back into the fuel tank returned.
Description
- Fig. 1
- eine Einspritzvorrichtung mit zwei Einspritzdüsen;
- Fig. 2
- eine Aufsicht auf den Zylinderdeckel gemäss Anordnung von Fig. 1;
- Fig. 3
- ein weiteres Ausführungsbeispiel einer Einspritzvorrichtung;
- Fig. 4a, 4b
- ein Verfahren zum Ansteuern von zwei Einspritzdüsen;
- Fig. 4c
- ein weiteres Verfahren zum Ansteuern von drei Einspritzdüsen;
- Fig. 5
- ein weiteres Ausführungsbeispiel einer Einspritzvorrichtung.
Während sich der Steuerkolben 100 nach unten bewegt, wird zunächst die Verbindung zwischen dem Hauptkanal 69 und dem Eingangskanalabschnitt 123 unterbrochen. Danach wird über die Nute 142 im Steuerkolben 100 der Ausgangskanal 124 mit dem Einspritzkanal 9a, der zur Einspritzdüse 1a des Zylinders 44 des Dieselmotors führt, verbunden. Der Dosierkolben 70 wird durch den vom Brennstoff über den Kanals 68 auf die Rückseite 72 des Dosierkolbens ausgeübten Druck bewegt. Der Brennstoff wird in den Zylinderraum 43 eingespritzt. Wird das Vorsteuerventil 91 geschlossen und der Rücklauf für das Steueröl geöffnet, so wird der Steuerkolben 100 durch den auf die Stirnfläche 144 des Steuerkolbens 100 wirkenden Brennstoffdruck und die Federkraft nach oben gedrückt. Die Brennstoffzufuhr zum Kanal 9a wird unterbrochen und somit das Einspritzende herbeigeführt. In Fig. 5 ist die zweite in den Brennraum 43 mündende Einspritzdüse 1b nur andeutungsweise dargestellt. Diese Einspritzdüse 1b wird von einer weiteren, zur Einspritzvorrichtung 40a identischen, aber nicht dargestellten Einspritzvorrichtung 40b mit Brennstoff versorgt.
Claims (6)
- Verfahren zum Einspritzen von Brennstoff in einen Brennraum eines Zylinders einer langsamlaufenden Zweitakt-Hubkolbenbrennkraftmaschine der Dieselbauart, wobei eine für einen Arbeitstakt bestimmte Brennstoffmenge mittels mindestens zweier Einspritzdüsen in den Brennraum eingespritzt wird und wobei die Einspritzdüsen in einer Reihenfolge geöffnet werden, dadurch gekennzeichnet, dass die Einspritzdüsen nacheinander in einer auswählbaren Reihenfolge bei unterschiedlichen Kurbelwellenwinkeln geöffnet werden, um den Massenstrom von Brennstoff in dem Zylinder innerhalb eines Arbeitstaktes frei zu steuern.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Reihenfolge der Einspritzung in den nachfolgenden Arbeitszyklen zyklisch vertauscht wird.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Kurbelwellenwinkel zwischen dem Öffnen zweier Einspritzdüsen mindestens 4 Grad beträgt.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Einspritzvorgang aller Einspritzdüsen gleichzeitig beendet wird.
- Vorrichtung zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 4 mit einer Regelvorrichtung (50) und einem mit der Regelvorrichtung (50) verbundenen Sensor (52) zur Erfassung des Kurbelwellenwinkels, dadurch gekennzeichnet, dass für jeden Zylinder mindestens zwei unabhängig ansteuerbare Einspritzvorrichtungen (40a,40b), welche mit je einer Einspritzdüse (1a,1b) verbunden sind, oder mindestens zwei direkt ansteuerbare Einspritzdüsen (1a,1b) vorgesehen sind.
- Hubkolbenbrennkraftmaschine betrieben mit einem Verfahren nach einem der Ansprüche 1 bis 4 oder aufweisend eine Vorrichtung nach Anspruch 5.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP95810733A EP0775821B1 (de) | 1995-11-24 | 1995-11-24 | Verfahren und Vorrichtung zum Einspritzen von Brennstoff bei einer Hubkolbenbrennkraftmaschine |
DK95810733T DK0775821T3 (da) | 1995-11-24 | 1995-11-24 | Fremgangsmåde og indretning til indsprøjtning af brændstof ved en stempelforbrændingsmotor |
DE59508329T DE59508329D1 (de) | 1995-11-24 | 1995-11-24 | Verfahren und Vorrichtung zum Einspritzen von Brennstoff bei einer Hubkolbenbrennkraftmaschine |
JP28240696A JP3896178B2 (ja) | 1995-11-24 | 1996-10-24 | 内燃式往復ピストン・エンジンに対して燃料を噴射する方法及び装置 |
KR1019960054441A KR100443036B1 (ko) | 1995-11-24 | 1996-11-15 | 왕복피스톤내연기관의연료분사방법및장치 |
FI964633A FI108313B (fi) | 1995-11-24 | 1996-11-20 | Menetelmä polttonesteen ruiskuttamiseksi, laitteisto menetelmän toteuttamiseksi ja iskumäntäpolttomoottorikone |
CN96117261A CN1086017C (zh) | 1995-11-24 | 1996-11-22 | 往复活塞内燃机的燃料喷射方法和设备 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP95810733A EP0775821B1 (de) | 1995-11-24 | 1995-11-24 | Verfahren und Vorrichtung zum Einspritzen von Brennstoff bei einer Hubkolbenbrennkraftmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0775821A1 EP0775821A1 (de) | 1997-05-28 |
EP0775821B1 true EP0775821B1 (de) | 2000-05-10 |
Family
ID=8221823
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95810733A Expired - Lifetime EP0775821B1 (de) | 1995-11-24 | 1995-11-24 | Verfahren und Vorrichtung zum Einspritzen von Brennstoff bei einer Hubkolbenbrennkraftmaschine |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0775821B1 (de) |
JP (1) | JP3896178B2 (de) |
KR (1) | KR100443036B1 (de) |
CN (1) | CN1086017C (de) |
DE (1) | DE59508329D1 (de) |
DK (1) | DK0775821T3 (de) |
FI (1) | FI108313B (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITPZ990004A1 (it) * | 1999-10-04 | 2001-04-04 | Cosimo Sarno | Sistemi pluri-iniettori. |
TW491930B (en) * | 2000-10-10 | 2002-06-21 | Waertsilae Nsd Schweiz Ag | Method for the injection of fuel |
JP5693189B2 (ja) * | 2010-12-08 | 2015-04-01 | 三菱重工業株式会社 | 内燃機関の燃料噴射装置および内燃機関の燃料噴射方法 |
DE102017102792A1 (de) | 2017-02-13 | 2018-08-16 | Ktm Ag | Zweitaktbrennkraftmaschine |
DE102018104856B4 (de) * | 2018-03-02 | 2020-06-10 | Mtu Friedrichshafen Gmbh | Verfahren zum Betreiben einer Brennkraftmaschine und Kraftstoffeinspritzsystem |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR840465A (fr) * | 1937-08-06 | 1939-04-26 | Porsche Kg | Moteur à combustion interne à marche rapide, en particulier pour des véhicules automobiles et des avions |
US2640422A (en) * | 1946-12-03 | 1953-06-02 | Texas Co | Fuel pump for internal-combustion engines |
FR967693A (fr) * | 1948-06-07 | 1950-11-09 | Perfectionnement aux moteurs à injection | |
JPS5438439A (en) * | 1977-08-30 | 1979-03-23 | Agency Of Ind Science & Technol | Fuel injection for pump multiple injection |
US4463733A (en) * | 1983-02-15 | 1984-08-07 | Deere & Company | Closed loop fuel injection timing control |
US4610427A (en) * | 1984-04-17 | 1986-09-09 | Nippon Soken, Inc. | Piezoelectric control valve for fuel injector of internal combustion engine |
DE59206823D1 (de) | 1992-09-11 | 1996-08-29 | New Sulzer Diesel Ag | Verfahren zum Brennstoffeinspritzen bei Dieselbrennkraftmaschinen |
-
1995
- 1995-11-24 DE DE59508329T patent/DE59508329D1/de not_active Expired - Lifetime
- 1995-11-24 DK DK95810733T patent/DK0775821T3/da active
- 1995-11-24 EP EP95810733A patent/EP0775821B1/de not_active Expired - Lifetime
-
1996
- 1996-10-24 JP JP28240696A patent/JP3896178B2/ja not_active Expired - Lifetime
- 1996-11-15 KR KR1019960054441A patent/KR100443036B1/ko active IP Right Grant
- 1996-11-20 FI FI964633A patent/FI108313B/fi not_active IP Right Cessation
- 1996-11-22 CN CN96117261A patent/CN1086017C/zh not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE59508329D1 (de) | 2000-06-15 |
DK0775821T3 (da) | 2000-08-07 |
JP3896178B2 (ja) | 2007-03-22 |
FI964633A (fi) | 1997-05-25 |
CN1086017C (zh) | 2002-06-05 |
FI964633A0 (fi) | 1996-11-20 |
CN1156789A (zh) | 1997-08-13 |
JPH09170525A (ja) | 1997-06-30 |
KR970027781A (ko) | 1997-06-24 |
KR100443036B1 (ko) | 2004-11-03 |
FI108313B (fi) | 2001-12-31 |
EP0775821A1 (de) | 1997-05-28 |
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