EP0391062B1 - Electronic speed governor for an air-compressing engine - Google Patents
Electronic speed governor for an air-compressing engine Download PDFInfo
- Publication number
- EP0391062B1 EP0391062B1 EP90103821A EP90103821A EP0391062B1 EP 0391062 B1 EP0391062 B1 EP 0391062B1 EP 90103821 A EP90103821 A EP 90103821A EP 90103821 A EP90103821 A EP 90103821A EP 0391062 B1 EP0391062 B1 EP 0391062B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- smoke
- fuel
- air
- pressure
- values
- 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
- 239000000779 smoke Substances 0.000 claims description 21
- 239000000446 fuel Substances 0.000 claims description 11
- 238000002485 combustion reaction Methods 0.000 claims description 10
- 230000001276 controlling effect Effects 0.000 claims 2
- 238000001514 detection method Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 claims 1
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000004071 soot Substances 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
- F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
- F02D31/001—Electric control of rotation speed
- F02D31/007—Electric control of rotation speed controlling fuel supply
- F02D31/009—Electric control of rotation speed controlling fuel supply for maximum speed control
-
- 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
-
- 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
- F02D2250/38—Control for minimising smoke emissions, e.g. by applying smoke limitations on the fuel injection amount
Definitions
- the invention relates to an electronic speed controller for an air-compressing internal combustion engine, according to the features specified in the preamble of claim 1.
- the exhaust gas temperature, the number of blackening (smoke) or the peak pressure is the limiting variable.
- the limiting areas, such as the smoke limit are marked accordingly in the full-load quantity map ( Figure 13 of the document mentioned). Due to the exact adherence to the given smoke limit curves, the smoke emissions are compared to those with conventional designs without smoke-limiting measures decreased. Limiting the smoke limit does not result in the desired driving performance in high-altitude operation.
- the invention is therefore based on the object of taking measures on the electronic speed controller by means of which the performance of the internal combustion engine can also be optimally used in height.
- the smoke limit curve is increased in height depending on the operation, without penetrating into the area of the impermissible smoke emission, the optimum utilization of the performance of the internal combustion engine can be achieved for the operating state in each case.
- the number of blackening that would otherwise normally decrease with the electronic system in high-altitude operation is therefore adapted to permissible values.
- the lower blackening number or the visible blackening in high-altitude operation based on the same excess air for combustion is based on the fact that for the visibility of the blackening the same exhaust gas volume is measured and evaluated with regard to the particles. Based on the evaluated volume, the tested exhaust gas mass or its particle content is therefore smaller than at sea level due to the lower air density with increasing altitude, for which the allocation of the fuel and air mass for the same smoke is related in the known electronic control mentioned at the beginning.
- the invention is explained in more detail using an exemplary embodiment shown in the drawing:
- the electronic speed controller for air-compressing, self-igniting internal combustion engines the injected fuel mass is specified in a speed-specific manner as a function of the respective air mass.
- the height socket is a signal generator, the signals of which are recorded by the electronic control unit and processed for the displacement of the smoke limit curve.
- the absolute pressure meter which is present anyway, can be used to determine the air mass in the internal combustion engine, in order to determine the barometer reading for the displacement of the smoke limit curve. This can be done by storing the pressure curve over a longer period of time, e.g. 10 to 15 Minutes can be provided, in which the absolute ambient pressure is recorded again and again due to the unavoidable gas removal due to gear changes or other circumstances. By reading the minimum value, the smallest existing pressure in a period of approx. 15 minutes can be used as a measure of the shift in the smoke limit curve.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Description
Die Erfindung bezieht sich auf einen elektronischen Drehzahlregler für eine luftverdichtende Brennkraftmaschine, gemäß den im Oberbegriff des Patentanspruchs 1 angegebenen Merkmalen.The invention relates to an electronic speed controller for an air-compressing internal combustion engine, according to the features specified in the preamble of claim 1.
Mit der elektronischen Dieselregelung (s. Automobil-Industrie 5/86 "Elektronische Dieselregelung", S. 653 ff.) ist eine präzise Vorgabe der Kraftstoffeinspritzmenge für jede vom Fahrer geforderte Fahrleistung unter Berücksichtigung von Umweltkriterien und Kriterien für zulässige Betriebsbereiche der Brennkraftmaschine erreicht. Im System melden Systemsensoren den Regelstangenweg, die Einspritzpumpendrehzahl, die Stellung des Fahrpedals, die Ladeluft- und Kraftstofftemperatur sowie den Ladedruck an ein elektronisches Steuergerät. Die aus diesen Signalen gebildete Korrekturgröße dient als Maß für die Festlegung der zulässigen Einspritzmassen, welche im Datenmodul gespeichert sind.With the electronic diesel control (see Automobil-Industrie 5/86 "Electronic Diesel Control", p. 653 ff.) A precise specification of the fuel injection quantity for each driving performance demanded by the driver is achieved taking into account environmental criteria and criteria for permissible operating ranges of the internal combustion engine. In the system, system sensors report the control rod travel, the injection pump speed, the position of the accelerator pedal, the charge air and fuel temperature as well as the boost pressure to an electronic control unit. The correction variable formed from these signals serves as a measure for determining the permissible injection masses which are stored in the data module.
Je nach Drehzahl der Brennkraftmaschine und Korrekturgröße ist entweder die Abgastemperatur, die Schwärzungszahl (Rauch) oder der Spitzendruck die begrenzende Größe. Im Vollastmengenkennfeld (Bild 13 der genannten Druckschrift) sind die begrenzenden Flächen, wie Rauchgrenze, entsprechend gekennzeichnet. Durch die genaue Einhaltung der vorgegebenen Rauchgrenzkurven sind die Rauchemissionen gegenüber denjenigen bei üblichen Ausführungen ohne rauchbegrenzende Maßnahmen verringert. Durch die Limitierung der Rauchgrenze ergeben sich jedoch im Höhenbetrieb nicht die erwünschten Fahrleistungen.Depending on the speed of the internal combustion engine and the correction size, either the exhaust gas temperature, the number of blackening (smoke) or the peak pressure is the limiting variable. The limiting areas, such as the smoke limit, are marked accordingly in the full-load quantity map (Figure 13 of the document mentioned). Due to the exact adherence to the given smoke limit curves, the smoke emissions are compared to those with conventional designs without smoke-limiting measures decreased. Limiting the smoke limit does not result in the desired driving performance in high-altitude operation.
Der Erfindung liegt daher die Aufgabe zugrunde, Maßnahmen am elektronischen Drehzahlregler zu treffen, durch die die Leistungsfähigkeit der Brennkraftmaschine auch in der Höhe bestmöglich ausgenutzt werden kann.The invention is therefore based on the object of taking measures on the electronic speed controller by means of which the performance of the internal combustion engine can also be optimally used in height.
Zur Lösung der Aufgabe dienen die im Kennzeichnen des Patentanspruchs 1 angegebenen Merkmale.The features specified in the characterizing part of patent claim 1 serve to achieve the object.
Dadurch, daß die Rauchgrenzkurve in Abhängigkeit vom Betrieb in der Höhe angehoben wird, ohne in den Bereich der unzulässigen Rauchemission vorzudringen, ist für den jeweils vorhandenen Betriebszustand die optimale Ausnutzung der Leistungsfähigkeit der Brennkraftmaschine erreichbar. Es wird also die sich mit dem elektronischen System im Höhenbetrieb sonst üblicherweise verringernde Schwärzungszahl an zulässige Werte angepaßt. Die niedriger ausfallende Schwärzungszahl bzw. die sichtbare Schwärzung im Höhenbetrieb bezogen auf den gleichen Luftüberschuß für die Verbrennung beruht auf der Tatsache, daß für die Sichtbarkeit der Schwärzung meßtechnisch dasselbe Abgasvolumen erfaßt und bezüglich der Partikel ausgewertet wird. Bezogen auf das ausgewertete Volumen ist deshalb die geprüfte Abgasmasse bzw. deren Partikelinhalt aufgrund der bei zunehmender Höhe geringeren Luftdichte kleiner als in Meereshöhe, für welche die Zuordnung der Kraftstoff- und Luftmasse für gleichen Rauch bei der bekannten, eingangs genannten elektronischen Regelung bezogen ist.The fact that the smoke limit curve is increased in height depending on the operation, without penetrating into the area of the impermissible smoke emission, the optimum utilization of the performance of the internal combustion engine can be achieved for the operating state in each case. The number of blackening that would otherwise normally decrease with the electronic system in high-altitude operation is therefore adapted to permissible values. The lower blackening number or the visible blackening in high-altitude operation based on the same excess air for combustion is based on the fact that for the visibility of the blackening the same exhaust gas volume is measured and evaluated with regard to the particles. Based on the evaluated volume, the tested exhaust gas mass or its particle content is therefore smaller than at sea level due to the lower air density with increasing altitude, for which the allocation of the fuel and air mass for the same smoke is related in the known electronic control mentioned at the beginning.
In den Unteransprüchen sind noch förderliche Weiterbildungen angegeben.In the subclaims, further training is indicated.
Die Erfindung wird anhand eines in der Zeichnung dargestellten Ausführungsbeispieles näher erläutert:
Beim elektronischen Drehzahlregler für luftverdichtende selbstzündende Brennkraftmaschinen wird die eingespritzte Kraftstoffmasse in Abhängigkeit von der jeweiligen Luftmasse drehzahlspezifisch vorgegeben. Der Einsatz der Elektronik für die Regelung derartiger Brennkraftmaschinen sowie die Anwendung der erfindungsgemäßen Maßnahme, die Rauchgrenzkurve höhenabhängig in Anpassung an eine konstante Rauchemission kraftstoffmassenkorrigierend zu verändern, und zwar durch den Anbau einer barometrischen Höhendose, wirkt sich hinsichtlich des Kraftstoffverbrauches und der Leistung optimal aus. Die Höhendose ist Signalgeber, dessen Signale vom elektronischen Steuergerät erfaßt und für die Verschiebung der Rauchgrenzkurve aufbereitet werden.The invention is explained in more detail using an exemplary embodiment shown in the drawing:
In the case of the electronic speed controller for air-compressing, self-igniting internal combustion engines, the injected fuel mass is specified in a speed-specific manner as a function of the respective air mass. The use of electronics for the control of such internal combustion engines and the application of the measure according to the invention to change the smoke limit curve depending on the height to adapt to a constant smoke emission to correct the fuel mass, namely by attaching a barometric height socket, has an optimal effect on fuel consumption and performance. The height socket is a signal generator, the signals of which are recorded by the electronic control unit and processed for the displacement of the smoke limit curve.
Da die sichtbare Schwarzung (sichtbarer Rußpartikelinhalt) in Meereshöhe z.B. die Rauchziffer von 3,0 hat, diese sichtbare Schwärzung jedoch aufgrund der mit zunehmender Höhe geringeren Luftdichte bei gleichem Abgasvolumen abnimmt und bei ca. 2000 m über der Meereshöhe eine Schwärzungszahl von ca. 2,5 aufweist, kann die Rauchgrenze höhenabhängig immer so verschoben werden, daß sich eine und dieselbe Schwärzungszahl von ca. 3,0 ergibt, d.h., daß z.B. in dem gezeigten Diagramm die Rauchgrenzkurve in Abhängigkeit von Kraftstoff- und Luftmasse von einer zulässigen Schwärzungszahl = SZ auf eine zulässige Schwärzungszahl =SZzul. bei einer bestimmten Höhenzunahme angehoben wird.Since the visible blackening (visible soot particle content) at sea level has, for example, the smoke number of 3.0, this visible blackening decreases due to the lower air density with the same exhaust gas volume as the altitude increases and a blackening number of approx. 2 at approx. 2000 m above sea level. 5, the smoke limit can always be shifted depending on the height so that one and the same blackening number of approx. 3.0 results, that is to say that, for example, in the diagram shown, the smoke limit curve depends on a permissible number of blackening = SZ depending on the fuel and air mass a permissible density number = SZ perm. is increased with a certain increase in height.
Für die Ermittlung der in der Brennkraftmaschine befindlichen Luftmasse kann der ohnehin vorhandene Absolutdruckmesser verwendet werden, um den Barometerstand für die Verschiebung der Rauchgrenzkurve zu bestimmen. Hierzu kann die Speicherung des Druckverlaufes über einen längeren Zeitraum, z.B. 10 bis 15 Minuten, vorgesehen sein, in dem immer wieder durch die im Fahrbetrieb nicht vermeidbare Gaswegnahme infolge von Gangwechseln oder anderen Gegebenheiten der absolute Umgebungsdruck erfaßt wird. Durch eine Minimalwertauslesung kann der im Zeitraum von ca. 15 Minuten jeweils kleinste vorhandene gewesene Druck als Maß für die Verschiebung der Rauchgrenzkurve verwendet werden.The absolute pressure meter, which is present anyway, can be used to determine the air mass in the internal combustion engine, in order to determine the barometer reading for the displacement of the smoke limit curve. This can be done by storing the pressure curve over a longer period of time, e.g. 10 to 15 Minutes can be provided, in which the absolute ambient pressure is recorded again and again due to the unavoidable gas removal due to gear changes or other circumstances. By reading the minimum value, the smallest existing pressure in a period of approx. 15 minutes can be used as a measure of the shift in the smoke limit curve.
Claims (3)
- Electronic speed controlling device for an air compressing internal combustion engine, with sensors for the detection of operating values such as charge air temperature, charge air pressure, r.p.m., travelling speed, with an absolute pressure gauge as well as with an electronic control device detecting the operating values and which, from the operating values and taking stored limit values into account, forms a regulating path of a fuel amount servo component, the limit values containing at least smoke limit curves by means of which, depending upon the limit values detected, maximum fuel amounts can be preset, and greater amounts of fuel being injected when the atmospheric pressure drops, characterized in that the smoke limit curves, when the atmospheric pressure drops, are raised to higher amounts of fuel in such a manner that, when the absolute pressure alters, a constant smoke number is obtained.
- Speed controlling device according to claim 1, characterized in that a barometric altitude aneroid is provided as signal emitter for the correction of the smoke limit curves.
- Speed controller according to claim 1, characterized in that the absolute pressure gauge for the determination of the amount of air is also utilized for determining the course of the pressure, this being stored for a definite period and, by minimum value selection over this period, the respective smallest pressure is used as measurement for raising the smoke limit curves.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3911145A DE3911145C1 (en) | 1989-04-06 | 1989-04-06 | |
| DE3911145 | 1989-04-06 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0391062A2 EP0391062A2 (en) | 1990-10-10 |
| EP0391062A3 EP0391062A3 (en) | 1991-10-09 |
| EP0391062B1 true EP0391062B1 (en) | 1992-11-04 |
Family
ID=6377997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90103821A Expired - Lifetime EP0391062B1 (en) | 1989-04-06 | 1990-02-27 | Electronic speed governor for an air-compressing engine |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US5086739A (en) |
| EP (1) | EP0391062B1 (en) |
| DE (1) | DE3911145C1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7340339B1 (en) * | 2003-02-14 | 2008-03-04 | Caterpillar Inc. | Power management system |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4117267A1 (en) * | 1991-05-27 | 1992-12-03 | Bosch Gmbh Robert | FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES |
| US5375577A (en) * | 1993-07-23 | 1994-12-27 | Caterpillar Inc. | Apparatus and method for controlling engine response versus exhaust smoke |
| US5539638A (en) * | 1993-08-05 | 1996-07-23 | Pavilion Technologies, Inc. | Virtual emissions monitor for automobile |
| US6158416A (en) * | 1998-11-16 | 2000-12-12 | General Electric Company | Reduced emissions elevated altitude speed control for diesel engines |
| JP2000345885A (en) * | 1999-05-31 | 2000-12-12 | Isuzu Motors Ltd | Fuel injection control device of diesel engine |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS544580Y2 (en) * | 1973-06-23 | 1979-02-27 | ||
| FR2278928A1 (en) * | 1973-10-30 | 1976-02-13 | Sigma Diesel | IMPROVEMENTS TO THE FUEL FLOW CONTROL DEVICES FOR INTERNAL COMBUSTION ENGINES |
| DE2526148C2 (en) * | 1975-06-12 | 1983-08-25 | Robert Bosch Gmbh, 7000 Stuttgart | Control device for the fuel supply of internal combustion engines |
| DE2747083A1 (en) * | 1977-10-20 | 1979-05-03 | Bosch Gmbh Robert | DEVICE FOR LIMITING THE FULL-LOAD INJECTION QUANTITY IN A CHARGED AIR-COMPRESSING INJECTION COMBUSTION ENGINE |
| US4368705A (en) * | 1981-03-03 | 1983-01-18 | Caterpillar Tractor Co. | Engine control system |
| JPS59188041A (en) * | 1983-04-08 | 1984-10-25 | Honda Motor Co Ltd | Fuel supply control method during deceleration of internal combustion engine |
| US4562810A (en) * | 1983-06-23 | 1986-01-07 | Nippondenso Co., Ltd. | Fuel injection pump |
| DE3400513A1 (en) * | 1984-01-10 | 1985-07-18 | Robert Bosch Gmbh, 7000 Stuttgart | FULL LOAD LIMIT OF AN INTERNAL COMBUSTION ENGINE |
| DE3710081A1 (en) * | 1987-03-27 | 1988-10-06 | Bosch Gmbh Robert | ENGINE CONTROL SYSTEM WITH ALTITUDE FUEL INJECTION |
-
1989
- 1989-04-06 DE DE3911145A patent/DE3911145C1/de not_active Expired - Lifetime
-
1990
- 1990-02-27 EP EP90103821A patent/EP0391062B1/en not_active Expired - Lifetime
- 1990-04-06 US US07/505,691 patent/US5086739A/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7340339B1 (en) * | 2003-02-14 | 2008-03-04 | Caterpillar Inc. | Power management system |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0391062A3 (en) | 1991-10-09 |
| EP0391062A2 (en) | 1990-10-10 |
| US5086739A (en) | 1992-02-11 |
| DE3911145C1 (en) | 1990-04-26 |
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