EP2173997A1 - Brennkraftmaschine mit mehreren zylindern - Google Patents
Brennkraftmaschine mit mehreren zylindernInfo
- Publication number
- EP2173997A1 EP2173997A1 EP08760780A EP08760780A EP2173997A1 EP 2173997 A1 EP2173997 A1 EP 2173997A1 EP 08760780 A EP08760780 A EP 08760780A EP 08760780 A EP08760780 A EP 08760780A EP 2173997 A1 EP2173997 A1 EP 2173997A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- rail
- fuel
- cylinders
- rails
- 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.)
- Granted
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 30
- 239000000446 fuel Substances 0.000 claims abstract description 31
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 5
- 238000004590 computer program Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 description 20
- 239000007924 injection Substances 0.000 description 20
- 238000010304 firing Methods 0.000 description 9
- 230000000739 chaotic effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 101150058910 RDS1 gene Proteins 0.000 description 2
- 101100219167 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) BUL1 gene Proteins 0.000 description 2
- 101100140267 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) RDS2 gene Proteins 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
- F02M55/025—Common rails
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
- F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/04—Means for damping vibrations or pressure fluctuations in injection pump inlets or outlets
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D2041/3881—Common rail control systems with multiple common rails, e.g. one rail per cylinder bank, or a high pressure rail and a low pressure rail
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/04—Fuel pressure pulsation in common rails
Definitions
- the present invention relates to an internal combustion engine having a plurality of cylinders, which are combined to form at least two cylinder banks, according to the preambles of the independent claims.
- High pressure pump must be larger.
- a solution with two high pressure pumps, each of the high-pressure quantity requirement of a cylinder bank cover used.
- the high-pressure quantity requirement of the two high-pressure rails or cylinder banks is covered by a common high-pressure pump, which has at least two hydraulically separated conveying elements, which are each hydraulically connected to a high-pressure rail. If an unequal ignition sequence is used in such an engine concept, this can lead to undesirably high pressure fluctuations in the two high-pressure trails.
- An object of the invention is therefore to provide a device, a method and a computer program, with each of which the pressure fluctuations in the individual high-pressure rails can be reduced.
- an internal combustion engine having a plurality of cylinders, which are combined to form at least two cylinder banks, this can be in particular a V-engine, wherein fuel can be injected by means of injectors into combustion chambers of the cylinder and wherein the injectors each with one of at least two high-pressure trails are connected, wherein the injectors of a cylinder bank are connected to different high-pressure trails.
- the internal combustion engine preferably comprises a first and a second cylinder bank and a first and second high-pressure rail, wherein some cylinders of the first cylinder bank with the first high-pressure rail and some cylinders of the first cylinder bank with the second high-pressure rail and some cylinders of the second cylinder bank with the first high-pressure rail and some cylinders the second cylinder bank are connected to the second high-pressure rail.
- an internal combustion engine having a plurality of cylinders which are combined to form two cylinder banks, in particular a V-type engine, wherein fuel is injected by means of injectors into combustion chambers of the cylinders can be and wherein the injectors are each connected to one of at least two high-pressure trails, the high-pressure quantity required each by its own high-pressure pump or by separate high-pressure elements of a high pressure pump, which are each hydraulically connected to one of the high pressure rails, covered, the high pressure rails hydraulically with each other are connected.
- the hydraulic connection enables a pressure equalization between the high-pressure rails, so that pressure fluctuations are reduced.
- the hydraulic connection of the high-pressure rails preferably comprises a throttle.
- the restrictor limits the flow rate of the hydraulic connection and dampens hydraulic vibrations caused by changing pressure differences and thus changing directions of flow.
- each of the high-pressure rails is pressurized by a high-pressure pump or by separate high-pressure elements of a high-pressure pump, which are hydraulically connected to one of the high-pressure rails, and the fuel pressure of a high-pressure rail is regulated and the fuel pressure of the other high-pressure rail is precontrolled.
- a chaotic behavior of the control which can arise due to the hydraulic connection, can be reduced or avoided.
- Each of the high pressure rails is preferably pressurized by a high pressure pump or by separate high pressure elements of a high pressure pump hydraulically connected to one of the high pressure rails, and the fuel pressure of a high pressure rail is controlled by a regulator comprising at least a proportional and an integral portion the fuel pressure of the other high-pressure rails is regulated by means of a regulator comprising only a proportional and no integrating component. This variant also reduces or avoids the aforementioned chaotic behavior of the pressure control.
- the problem mentioned at the outset is also solved by a method for operating an internal combustion engine having a plurality of cylinders, which are combined to form two cylinder banks, in particular a V-type engine, wherein fuel can be injected into combustion chambers of the cylinders by means of injectors and wherein the injectors each with ei - Nem of at least two high-pressure trails are connected, wherein the high-pressure rails are pressurized by a high-pressure pump or by separate high-pressure elements of a high-pressure pump, which are each hydraulically connected to one of the high-pressure rail, is pressurized, characterized that the fuel pressure of a
- High-pressure trails is regulated and the fuel pressure of the other high-pressure trails is piloted.
- the fuel pressure of a high-pressure rail is preferably regulated by means of a regulator which comprises at least one proportional and an integral component, and the fuel pressure of the other high-pressure rail is preferably regulated by means of a regulator which comprises only a proportional component.
- Fig. 1 is a sketch of a first embodiment of an injection system of a
- FIG. 2 shows a sketch of an injection or firing order of the exemplary embodiment according to FIG. 1;
- FIG. 3 shows a schematic diagram to illustrate pressure fluctuations of the pressure in the high-pressure rail
- FIG. 4 shows a sketch of a first exemplary embodiment of a control or regulation
- 5 shows a sketch of a second embodiment of a control
- Fig. 6 is a sketch of a second embodiment of an injection system of a
- FIG. 7 shows a sketch of an injection or firing order of the exemplary embodiment according to FIG. 6.
- Fig. 1 shows a sketch of an injection system of an internal combustion engine in a greatly simplified representation. Shown is a rough sketch of an injection system 1 of an eight-cylinder diesel engine. It is assumed here by an 8-cylinder internal combustion engine with a cylinder arrangement in V-shape, wherein the cylinders each form a row of cylinders a cylinder bank Bl or B2. The cylinders,
- Pistons, exhaust valves and the like of the internal combustion engine are not shown in the sketch of FIG. 1, the cylinders are referred only by the respective injectors, these are referred to here as Il to 18.
- the injectors Il to 14 belong to the first cylinder bank Bl
- the injectors 15 to 18 belong to the second cylinder bank B2.
- the injectors II to 18 each include an injection valve, which can be opened and closed electrically by a piezoelectric or magnetic actuator.
- the injectors Il to 14 are controlled by the control unit Sl
- the injectors 15 to 18 are controlled by the control unit S2.
- the injectors Il to 14 are controlled by the control unit Sl
- the injectors 15 to 18 are controlled by the control unit S2.
- Injectors are each connected to a known high-pressure rail Rl or R2.
- the injectors II to 14 are connected to the high-pressure rail RI, and the injectors 15 to 18 are connected to the high-pressure rail R2.
- the high-pressure rail Rl is acted upon by a high-pressure pump Pl with fuel pressure, the high-pressure rail R2 is pressurized by a high-pressure pump P2 with fuel.
- the high-pressure pumps Pl and P2 can either be supplied with fuel by separate low-pressure pumps or by a common low-pressure pump.
- One of the control units is operated as a master, the other as a slave. Alternatively, the control can also be done by a common control unit.
- the pressure in the high-pressure rail Rl is measured by a first pressure sensor RDS1 and transmitted to the control unit S1, according to the pressure in the high-pressure rail R2 is measured via a second pressure sensor RDS2 and transmitted to the control unit S2.
- the high-pressure rails Rl and R2 are hydraulically connected to each other with a connecting line 2.
- a throttle 3 is arranged within the connecting line 2.
- the throttle may be a throttle valve with a constant constriction, as in the illustration of FIG. 1, but may also be a throttle valve that is adjustable. In this case, an electro-mechanical adjustment, which is controlled, for example, by one of the control units S1 or S2 or an extra control, is available.
- the firing order is plotted over the crankshaft angle and plotted graphically one above the other for easier understanding.
- the firing order here is 1, 5, 7, 2, 6, 3, 4, 8.
- the bank-wise representation shows that, for example, the cylinders 5 and 7 of
- Cylinder bank B2 and the cylinders 3 and 4 of the cylinder bank Bl with a relatively short distance of l / n * 720 0 KW (n number of cylinders) ignite successively and thus injected with this short distance in succession.
- one of the high pressure pumps may be driven in an open loop (i.e., a controller), the other high pressure pump is still controlled by a closed loop.
- the control of the high pressure pump controlled by an open control loop is stored in a pilot control map in the control unit. 4 shows a sketch of such a control.
- the control loop for the high-pressure rail Rl is shown, this includes a controller RGl, the output of which supplies a control variable for the high pressure pump Pl.
- the high-pressure rail pressure PR1 At the outlet of the high-pressure pump P1, there is the high-pressure rail pressure PR1, which is measured by a pressure sensor RDS1 and is applied as an electrical signal to a subtractor with negative characters upstream of the input of the controller RG1.
- the setpoint rail pressure P1_S is applied as the reference variable with a positive sign.
- the high-pressure rail R2 does not include any control but is controlled on the basis of the desired value PR2_S of the high-pressure rail pressure via a controller S2, which determines a control variable for the high-pressure pump P2 on the basis of a characteristic diagram.
- the high pressure rail pressures PR1 and PR2 of both high pressure rails R1 and R2 can be controlled as shown in FIG. Both control circuits are therefore structured as the control loop for the high-pressure rail Rl in Fig. 4.
- the controller RGl in Fig. 5 for the high-pressure rail Rl is a controller with a proportional component and an integrating component, thus a PI controller.
- the regulator for the high-pressure rail R2, designated as RG 2 in FIG. 5, has only a proportional component, ie is a pure P controller.
- the proportional component can react dynamically to existing system deviations in the short term.
- the integrating component responds with a time delay even to small deviations from the setpoint.
- FIG. 6 shows a further alternative embodiment of an injection system for a multi-cylinder internal combustion engine.
- the representation essentially corresponds to the representation in FIG. 1.
- the designation of identical assemblies is the same.
- the hydraulic connection between the two high-pressure rails R1 and R2 is dispensed with here. Instead, the assignment high-pressure rail Rl to cylinder bank Bl and high-pressure R2 to cylinder bank B2 is repealed.
- the injectors of the cylinder bank 1, which are the injectors II, 12, 13 and 14 are no longer associated with the high-pressure rail Rl, instead are in the specific example of the above ignition sequence 1, 5, 7, 2, 6, 3, 4, 8 the injectors Il and 14 associated with the high-pressure rail Rl, the injectors 12 and 13 are associated with the high-pressure rail R2.
- the injectors 15 and 18 of the second cylinder bank B2 are assigned to the high-pressure rail R2, which
- Injectors 16 and 17 of the second cylinder bank B2 are assigned to the high-pressure rail Rl.
- An alternative, likewise unequal firing sequence can be counteracted by an alternative, suitable assignment of the injectors to the high-pressure rails R 1 and R 2 in the sense of the invention. While the assignment between high-pressure rail Rl and cylinder bank Bl and high-pressure rail R2 and cylinder bank B2 is identical in FIG. 2, this is not identical in FIG. 7, instead only the high pressure rails Rl and R2 reference.
- the high-pressure rail Rl are assigned to the cylinders 1, 4, 6, 7, the high-pressure rail R2, the cylinders 2, 3, 5 and 8 are assigned. As can be seen from FIG. 7, the ignitions and thus the injections are in each case alternately assigned to the high-pressure rails R 1 and R 2, so that no different pause times occur between successive injections as in the exemplary embodiment according to FIG.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200710034317 DE102007034317A1 (de) | 2007-07-24 | 2007-07-24 | Brennkraftmaschine mit mehreren Zylindern |
| PCT/EP2008/057220 WO2009013059A1 (de) | 2007-07-24 | 2008-06-10 | Brennkraftmaschine mit mehreren zylindern |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2173997A1 true EP2173997A1 (de) | 2010-04-14 |
| EP2173997B1 EP2173997B1 (de) | 2012-06-06 |
Family
ID=39745126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08760780A Not-in-force EP2173997B1 (de) | 2007-07-24 | 2008-06-10 | Brennkraftmaschine mit mehreren zylindern |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2173997B1 (de) |
| CN (1) | CN101755118B (de) |
| DE (1) | DE102007034317A1 (de) |
| RU (1) | RU2468241C2 (de) |
| WO (1) | WO2009013059A1 (de) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009050469B4 (de) * | 2009-10-23 | 2015-11-05 | Mtu Friedrichshafen Gmbh | Verfahren zur Steuerung und Regelung einer Brennkraftmaschine |
| DE102009051389A1 (de) | 2009-10-30 | 2011-05-26 | Mtu Friedrichshafen Gmbh | Verfahren zur Steuerung und Regelung einer Brennkraftmaschine in V-Anordnung |
| DE102009051390B4 (de) * | 2009-10-30 | 2015-10-22 | Mtu Friedrichshafen Gmbh | Verfahren zur Steuerung und Regelung einer Brennkraftmaschine |
| DE102011103988A1 (de) | 2011-06-10 | 2012-12-13 | Mtu Friedrichshafen Gmbh | Verfahren zur Raildruckregelung |
| JP2015086839A (ja) * | 2013-11-01 | 2015-05-07 | スズキ株式会社 | 燃料噴射装置 |
| CN109791380B (zh) | 2016-10-04 | 2021-04-16 | Asml荷兰有限公司 | 对准系统的无热化 |
| DE102018220566A1 (de) * | 2018-11-29 | 2020-06-04 | Robert Bosch Gmbh | Kraftstofffördereinrichtung für eine Brennkraftmaschine und ein Verfahren zur Regelung des Druckes in einer Kraftstofffördereinrichtung |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5191867A (en) * | 1991-10-11 | 1993-03-09 | Caterpillar Inc. | Hydraulically-actuated electronically-controlled unit injector fuel system having variable control of actuating fluid pressure |
| DE4335171C1 (de) * | 1993-10-15 | 1995-05-04 | Daimler Benz Ag | Kraftstoffeinspritzanlage für eine mehrzylindrige Dieselbrennkraftmaschine |
| US5560825A (en) * | 1994-06-21 | 1996-10-01 | Caterpillar Inc. | Edge filter for a high pressure hydraulic system |
| DE19646581A1 (de) * | 1996-11-12 | 1998-05-14 | Bosch Gmbh Robert | Kraftstoffeinspritzsystem |
| DE19712135C1 (de) * | 1997-03-22 | 1998-08-13 | Mtu Friedrichshafen Gmbh | Kraftstoffeinspritzsystem für eine Brennkraftmaschine |
| DE19955617B4 (de) * | 1999-11-19 | 2004-05-19 | Mtu Friedrichshafen Gmbh | Verfahren zur Steuerung einer Brennkraftmaschine mit zwei Hochdruck-Pumpen |
| FI117349B (fi) * | 2002-08-02 | 2006-09-15 | Waertsilae Finland Oy | Polttoaineen syöttöjärjestelmä |
| US6925989B2 (en) * | 2003-08-18 | 2005-08-09 | Visteon Global Technologies, Inc. | Fuel system having pressure pulsation damping |
| JP2005163556A (ja) * | 2003-11-28 | 2005-06-23 | Denso Corp | コモンレール式燃料噴射装置 |
| JP2006046169A (ja) * | 2004-08-04 | 2006-02-16 | Toyota Motor Corp | 内燃機関の燃料圧力制御装置 |
| CN2876357Y (zh) * | 2005-11-18 | 2007-03-07 | 上海汽车集团股份有限公司 | V型发动机燃油分配管 |
-
2007
- 2007-07-24 DE DE200710034317 patent/DE102007034317A1/de not_active Withdrawn
-
2008
- 2008-06-10 EP EP08760780A patent/EP2173997B1/de not_active Not-in-force
- 2008-06-10 WO PCT/EP2008/057220 patent/WO2009013059A1/de not_active Ceased
- 2008-06-10 RU RU2010106243/06A patent/RU2468241C2/ru not_active IP Right Cessation
- 2008-06-10 CN CN2008801000694A patent/CN101755118B/zh not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009013059A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101755118A (zh) | 2010-06-23 |
| RU2010106243A (ru) | 2011-08-27 |
| RU2468241C2 (ru) | 2012-11-27 |
| CN101755118B (zh) | 2012-10-03 |
| WO2009013059A1 (de) | 2009-01-29 |
| EP2173997B1 (de) | 2012-06-06 |
| DE102007034317A1 (de) | 2009-01-29 |
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