EP1072780A2 - Verfahren zur Steuerung eines Common-Rail-Einspritzsystems - Google Patents
Verfahren zur Steuerung eines Common-Rail-Einspritzsystems Download PDFInfo
- Publication number
- EP1072780A2 EP1072780A2 EP00107645A EP00107645A EP1072780A2 EP 1072780 A2 EP1072780 A2 EP 1072780A2 EP 00107645 A EP00107645 A EP 00107645A EP 00107645 A EP00107645 A EP 00107645A EP 1072780 A2 EP1072780 A2 EP 1072780A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- injection quantity
- stationary
- rail pressure
- characteristic curve
- load
- 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
- 238000002347 injection Methods 0.000 title claims abstract description 73
- 239000007924 injection Substances 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000001052 transient effect Effects 0.000 claims description 25
- 238000002485 combustion reaction Methods 0.000 claims description 13
- 239000000779 smoke Substances 0.000 description 20
- 230000008901 benefit Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000000446 fuel Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 230000001133 acceleration Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- F02D41/3827—Common rail control systems for diesel engines
-
- 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
- F02D2250/31—Control of the fuel pressure
Definitions
- the present invention relates to a method for control a common rail injection system for internal combustion engines, especially for turbo-chargeable diesel engines the preamble of claim 1.
- Nozzles, injectors, etc. are common rail systems as the usual variation parameters the start of spraying, the Rail pressure and any additional injections.
- turbocharged engines In contrast to conventional naturally aspirated engines, it is particularly important with turbocharged engines whether the engine is operated with a stationary load (ie constant injection quantity) or unsteady load. This is because, in turbocharged engines, the exhaust gas stream drives a turbine, which in turn acts on a compressor that pushes the fresh air into the combustion chamber. If more fuel is injected into the combustion chamber, the higher energy in the exhaust gas results in a higher boost pressure. The boost pressure therefore depends heavily on the injection quantity. At a steady operating point (speed and load constant), this results in a balanced state, ie the turbocharger rotates at a constant speed. Such a balanced state does not exist in the case of transient load states.
- EP 0 812 981 A2 also describes a control method the injection of a during an unsteady state of a turbocharged diesel engine.
- a control method the injection of a during an unsteady state of a turbocharged diesel engine.
- the injection pressure with increasing engine load known, but if a transient is found Condition a lower pressure increase than in one appropriate steady state is running.
- the object of the invention is to provide control of a Common rail injection system with which the total particle emission compared to conventional solutions in can be reduced in a simple manner.
- the rail pressure is expedient when the engine load is unsteady regarding the rail pressure with stationary engine load with the same injection quantities each by a constant Amount increased.
- Such an addition of a constant The value of a stationary characteristic is control-related can be carried out in a simple and uncomplicated manner.
- a preferred differential rail pressure amount is 200-400 bar, especially 300 bar.
- Such rail pressure increases are easy to implement and lead to advantageous ones Changes in the characteristics of the internal combustion engine.
- the rail pressure increase or Difference rail pressure amount does not have to be constant, and the specified pressure values only given as an example are.
- the rail pressure increase can be chosen freely, and can, for example depending on the engine parameters speed, Load, or other parameters, can be optimized.
- the procedure is a maximum permissible injection quantity per engine stroke as a function of turbocharger pressure of the internal combustion engine in the first, stationary or quasi-stationary Load state according to a first characteristic curve, and in the second, transient load state according to a second Characteristic curve set, the maximum permissible injection quantity in the case of a transient load state with regard to the maximum permissible injection quantity for stationary or quasi-stationary Load condition increased at the same boost pressure is.
- the full engine torque is only available when the boost pressure over a certain point of a smoke map line goes out and the injection quantity, depending on the speed, may no longer be increased.
- the increase of the rail pressure or injection pressure according to the invention and the simultaneous increase in the limit amount in the so-called smoke map result in particular
- the full engine torque is compared traditional solutions reached earlier and during the load increase the driver is responsible higher torque available. Obtained while driving this has advantages in starting and acceleration behavior. Overall, the efficiency is one over the Method controlled motor according to the invention during the Rail pressure increase improved, which for example leads to a leads to lower specific consumption.
- the realization the method according to the invention can be carried out in software, conventionally already existing EDC sensors can be used.
- the injection differential amount 15 - 25, in particular 21 mg / stroke is up to, for example, about 90% of the stationary full-load torque is available to be shortened by about 30%. Further stands up to the driver during an unsteady phase 20% higher torque available.
- the differential injection amount or the increase in the injection quantity must are also not necessarily chosen to be constant, the values given here are only examples are communicated. The limit values can also be found here Can be freely chosen within the scope of an optimization.
- Rail pressure map is the rail pressure depending on Speed and injection quantity Me stored.
- Me the rail pressure
- the rail pressure curve for a constant speed is 10 in FIG designated. It can be seen that with increasing injection quantity An increase in rail pressure is planned. At higher Injection volumes can make the curve of the rail pressure curve flat (constant rail pressure) or steadily increasing his.
- the second provided according to the invention Measure, namely increasing the maximum allowable Injection quantity in the smoke map for transient Full load explained.
- the maximum allowable injection quantity Me depending on that by means of a turbocharger provided (corrected) boost pressure p shown.
- Curve F (shown in broken lines) represents the characteristic curve for a transient partial load
- curve G the characteristic for an unsteady full load
- curve H the characteristic curve provided according to the invention for a transient Full load with an increase in the limit quantity in the case a rail pressure increase.
- the engine was transferred from a static partial load (curve F) to a transient one Full load operation is a transition from the characteristic curve F to the characteristic curve G. That is, it was, accordingly a transition from point 2 to point 3, an increase in Injection quantity permitted for a certain boost pressure, however, this increase in injection quantity was in accordance with the Characteristic of the instatic full load selected.
- the characteristic curve H is approximately constant Amount increased compared to the characteristic curve curve G is.
- the characteristic curve H is approximately constant Amount increased compared to the characteristic curve curve G is.
- the transient full load is the characteristic or Curve H over point 3 'into point 4.
- the invention So measure is the maximum allowable Injection quantity for a state of the transient Engine load compared to the conventional maximum injection quantity to increase. It should be noted that the The limit quantity can only be increased in connection with the Rail pressure should increase. With this combination of measures optimal results can be achieved.
- the boundary lines drawn in FIG. 3 are stored as characteristic maps in an EDC device, for example.
- the characteristic curve G already exists in the form of the smoke map.
- the characteristic curve H is stored as a new map.
- FIG. 4 The results that can be achieved with this measure are shown in FIG. 4 shown.
- the curves A, B symbolize the Torque curve over time with transient Full load, and curves D, E the corresponding turbidity.
- the solid lines show states in which a rail pressure increase and an increased maximum injection quantity are provided, the dashed lines Base state according to Fig. 2, i.e. without rail pressure increase and without the additional increase in the maximum injection quantity according to the characteristic curve H of FIG. 3.
- the quality of a good adaptation of the smoke map is usually assessed by observing the maximum smoke burst on the one hand and determining the duration until 90% of the steady-state full-load torque Md VL (stat.) Is available. From Fig. 4 it can be seen that this duration in the basic state (without rail pressure increase and additional injection quantity increase) is about 2.7 seconds. With the rail pressure increase provided according to the invention and an additional increase in the limit quantity in the smoke map, this duration is shortened to 1.9 seconds, which corresponds to a reduction of approximately 30%. The measures according to the invention therefore provide a higher acceleration torque and a static full-load torque that is reached more quickly.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Fuel-Injection Apparatus (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
Description
- Fig. 1
- ein Schaubild zur Darstellung der erfindungsgemäßen Maßnahme der Anhebung des Raildrucks bei einem instationären Lastzustand,
- Fig. 2
- ein Schaubild zur Darstellung des Drehmoments und einer Abgastrübung in Abhängigkeit von der Zeit mit und ohne die erfindungsgemäße Raildruckanhebung,
- Fig. 3
- ein Schaubild zur Darstellung der Maßnahme der Erhöhung der maximalen Einspritzmenge im Rauchkennfeld bei instationärer Vollast,
- Fig. 4
- ein der Fig. 2 entsprechendes Schaubild im Falle einer zusätzlich vorgesehenen Erhöhung der maximalen Einspritzmenge.
Claims (8)
- Verfahren zur Steuerung eines Common-Rail-Einspritzsystems für turboladbare Verbrennungsmotoren, insbesondere Dieselmotoren, bei welchem in einem ersten stationären oder quasistationären Lastzustand des Verbrennungsmotors ein Raildruck als Funktion der Einspritzmenge gemäß einer ersten Kennlinie eingestellt wird,
dadurch gekennzeichnet, daß
in einem zweiten, instationären Lastzustand des Verbrennungsmotors, insbesondere bei instationärer Vollast, der Raildruck als Funktion der Einspritzmenge gemäß einer zweiten Kennlinie eingestellt wird, wobei der Raildruck bei instationärem Lastzustand bezüglich des Raildrucks bei stationärem oder quasistationären Lastzustand bei gleicher Einspritzmenge jeweils erhöht ist. - Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die zweite Kennlinie sich von der ersten Kennlinie um einen konstanten Differenz-Raildruckbetrag unterscheidet.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Differenz-Raildruck unter Berücksichtigung von Verbrennungsmotorparametern und im Hinblick auf diese gewählt bzw. optimiert wird.
- Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß der Differenz-Raildruck 200 - 400 bar, insbesondere 300 bar, beträgt.
- Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß eine maximal zulässige Einspritzmenge pro Verbrennungsmotorhub als Funktion eines Turboladedrucks des Verbrennungsmotors in dem ersten, stationären oder quasistationären Lastzustand gemäß einer ersten Kennlinie, und in dem zweiten, instationären Lastzustand gemäß einer zweiten Kennlinie eingestellt wird, wobei die maximal zulässige Einspritzmenge bei instationärem Lastzustand bezüglich der maximal zulässigen Einspritzmenge bei stationärem oder quasistationärem Lastzustand bei gleichem Ladedruck jeweils erhöht ist.
- Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß die zweite Einspritzmengen-Kennlinie sich von der ersten Einspritzmengen-Kennlinie wenigstens teilweise um einen im wesentlichen konstanten Einspritzmengen-Differenzbetrag unterscheidet.
- Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß der Einspritzmengen-Differenzbetrag im Hinblick auf Verbrennungsmotorparameter und/oder Emissionen frei gewählt bzw. optimiert wird.
- Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß der Einspritzmengen-Differenzbetrag 15 - 25, insbesondere 21 mg/Hub beträgt.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19934833 | 1999-07-24 | ||
| DE19934833A DE19934833A1 (de) | 1999-07-24 | 1999-07-24 | Verfahren zur Steuerung eines Common-Rail-Einspritzsystems |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1072780A2 true EP1072780A2 (de) | 2001-01-31 |
| EP1072780A3 EP1072780A3 (de) | 2003-05-07 |
| EP1072780B1 EP1072780B1 (de) | 2008-02-27 |
Family
ID=7915964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00107645A Expired - Lifetime EP1072780B1 (de) | 1999-07-24 | 2000-04-08 | Verfahren zur Steuerung eines Common-Rail-Einspritzsystems |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6401692B1 (de) |
| EP (1) | EP1072780B1 (de) |
| JP (1) | JP2001055949A (de) |
| DE (2) | DE19934833A1 (de) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10337916A1 (de) * | 2003-08-18 | 2005-03-17 | Vorwerk & Co. Interholding Gmbh | Reluktanzmotor und Verfahren zum Wickeln eines Reluktanzmotors |
| US7332001B2 (en) * | 2003-10-02 | 2008-02-19 | Afton Chemical Corporation | Method of enhancing the operation of diesel fuel combustion systems |
| US8192698B2 (en) * | 2006-01-27 | 2012-06-05 | Parker-Hannifin Corporation | Sampling probe, gripper and interface for laboratory sample management systems |
| US7426917B1 (en) * | 2007-04-04 | 2008-09-23 | General Electric Company | System and method for controlling locomotive smoke emissions and noise during a transient operation |
| DE102008001992A1 (de) | 2007-12-18 | 2009-06-25 | Robert Bosch Gmbh | Verfahren zum Kontrollieren einer Einspritzung |
| DE102010003736A1 (de) * | 2010-04-08 | 2011-10-13 | Man Diesel & Turbo Se | Brennkraftmaschine und Verfahren zum Steuern des Betriebs der Brennkraftmaschine |
| EP2661547A1 (de) * | 2011-01-07 | 2013-11-13 | Nissan Motor Co., Ltd | Brenneinspritzsteuervorrichtung und -verfahren für dieselmotoren |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4841936A (en) | 1985-06-27 | 1989-06-27 | Toyota Jidosha Kabushiki Kaisha | Fuel injection control device of an internal combustion engine |
| EP0912981A1 (de) | 1996-06-18 | 1999-05-06 | ABB POWER T & D COMPANY INC. | Elektroisolierflüssigkeiten mit einem hohen gehalt an ölsäure sowie verfahren zu ihrer herstellung |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6234742Y2 (de) * | 1981-05-09 | 1987-09-04 | ||
| JPH0646011B2 (ja) * | 1985-09-13 | 1994-06-15 | トヨタ自動車株式会社 | 内燃機関の空燃比制御装置 |
| US5313924A (en) * | 1993-03-08 | 1994-05-24 | Chrysler Corporation | Fuel injection system and method for a diesel or stratified charge engine |
| IT1261574B (it) * | 1993-09-03 | 1996-05-23 | Fiat Ricerche | Sistema di controllo dell'iniezione in impianti di iniezione ad alta pressione per motori a combustione interna |
| IT1268026B1 (it) * | 1994-03-01 | 1997-02-20 | Fiat Ricerche | Sistema elettronico per il controllo della pressione di iniezione in transitorio. |
| JP2885076B2 (ja) * | 1994-07-08 | 1999-04-19 | 三菱自動車工業株式会社 | 蓄圧式燃料噴射装置 |
| DE4446246C2 (de) * | 1994-12-23 | 1999-10-21 | Mtu Friedrichshafen Gmbh | Verfahren zur Regelung des Lastannahme- und Beschleunigungsverhaltens von aufgeladenen Brennkraftmaschinen |
| ES2195054T3 (es) | 1996-06-14 | 2003-12-01 | Fiat Ricerche | Metodo y dispositivo para controlar la inyeccion de un motor diesel sobrealimentado en regimen transitorio. |
| DE19645389C1 (de) * | 1996-11-04 | 1998-03-26 | Daimler Benz Ag | Verfahren zur Regelung der Vollasteinspritzmenge einer Dieselbrennkraftmaschine |
| EP0930426B1 (de) * | 1998-01-13 | 2003-12-03 | Siemens Aktiengesellschaft | Verfahren zur Vorgabe des Einspritzdruck-Sollwertes bei Speichereinspritzsystemen |
-
1999
- 1999-07-24 DE DE19934833A patent/DE19934833A1/de not_active Withdrawn
-
2000
- 2000-04-08 DE DE50014989T patent/DE50014989D1/de not_active Expired - Lifetime
- 2000-04-08 EP EP00107645A patent/EP1072780B1/de not_active Expired - Lifetime
- 2000-07-21 JP JP2000221194A patent/JP2001055949A/ja active Pending
- 2000-07-24 US US09/621,661 patent/US6401692B1/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4841936A (en) | 1985-06-27 | 1989-06-27 | Toyota Jidosha Kabushiki Kaisha | Fuel injection control device of an internal combustion engine |
| EP0912981A1 (de) | 1996-06-18 | 1999-05-06 | ABB POWER T & D COMPANY INC. | Elektroisolierflüssigkeiten mit einem hohen gehalt an ölsäure sowie verfahren zu ihrer herstellung |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19934833A1 (de) | 2001-01-25 |
| JP2001055949A (ja) | 2001-02-27 |
| DE50014989D1 (de) | 2008-04-10 |
| US6401692B1 (en) | 2002-06-11 |
| EP1072780A3 (de) | 2003-05-07 |
| EP1072780B1 (de) | 2008-02-27 |
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