CH713369B1 - Charged diesel engine. - Google Patents
Charged diesel engine. Download PDFInfo
- Publication number
- CH713369B1 CH713369B1 CH00115/17A CH1152017A CH713369B1 CH 713369 B1 CH713369 B1 CH 713369B1 CH 00115/17 A CH00115/17 A CH 00115/17A CH 1152017 A CH1152017 A CH 1152017A CH 713369 B1 CH713369 B1 CH 713369B1
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- CH
- Switzerland
- Prior art keywords
- diesel oil
- diesel
- mixing chamber
- water emulsion
- air
- Prior art date
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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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/022—Adding fuel and water emulsion, water or steam
- F02M25/0227—Control aspects; Arrangement of sensors; Diagnostics; Actuators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B47/00—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines
- F02B47/02—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines the substances being water or steam
-
- 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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/022—Adding fuel and water emulsion, water or steam
- F02M25/0228—Adding fuel and water emulsion
-
- 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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/022—Adding fuel and water emulsion, water or steam
- F02M25/025—Adding water
- F02M25/028—Adding water into the charge intakes
-
- 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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/022—Adding fuel and water emulsion, water or steam
- F02M25/0221—Details of the water supply system, e.g. pumps or arrangement of valves
- F02M25/0222—Water recovery or storage
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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
- F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
- F02M2700/43—Arrangements for supplying air, fuel or auxiliary fluids to a combustion space of mixture compressing engines working with liquid fuel
- F02M2700/4302—Arrangements for supplying air, fuel or auxiliary fluids to a combustion space of mixture compressing engines working with liquid fuel whereby air and fuel are sucked into the mixture conduit
- F02M2700/4321—Arrangements for supplying air, fuel or auxiliary fluids to a combustion space of mixture compressing engines working with liquid fuel whereby air and fuel are sucked into the mixture conduit working with fuel and admission of auxiliary fluids such as water, anti-knock agents, hydrogen, ozone or the like
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
Die Erfindung betrifft einen aufgeladenen Dieselmotor, bestehend aus einem Mehrzylinder-Motor (7) und einem Turbolader (1) mit Verdichter (1a) und Turbine (1b), Ladeluftkühler (2), Abblase-Ventil (3), einer Mischkammer (4a) zur Erzeugung einer Dieselöl-Wasser-Emulsion und einer Mischkammer (4b) zur Erzeugung einer Mischung von Luft und Dieselöl-Wasser-Emulsion, Drosselklappe (5), einem Ansaugkrümmer (6) und Auslasskollektoren (8a), einer Abgasleitung (8b) und Abgasreinigungssystem (11) sowie einer Hochdruck-Dieselölleitung (9) und einem Dieselöl-Verteilsystem (10) mit zwei Dieselölleitungen (9a, 9b). Eine Dieselölmenge für den Dieselmotor ist in zwei Stufen in einen Luftstrom zur Verbesserung der Mischung einspritzbar ist, wobei das Dieselöl für die erste Stufe (9b) mittels der Dieselöl-Wasser-Emulsion in der nachfolgenden Mischkammer (4b) vor der Ausgangskammer (6) in den Luftstrom einführbar ist und das Dieselöl für die zweite Stufe (9a) direkt in den Brennraum der Zylinderköpfe einspritzbar ist. Hierdurch entsteht eine geringe Stickoxydmenge bei der Verbrennung.The invention relates to a supercharged diesel engine, comprising a multi-cylinder engine (7) and a turbocharger (1) with compressor (1a) and turbine (1b), intercooler (2), blow-off valve (3), a mixing chamber (4a). for producing a diesel oil-water emulsion and a mixing chamber (4b) for producing a mixture of air and diesel oil-water emulsion, throttle (5), an intake manifold (6) and outlet collectors (8a), an exhaust pipe (8b) and exhaust gas purification system (11) and a high-pressure diesel oil line (9) and a diesel oil distribution system (10) with two diesel oil lines (9a, 9b). A diesel fuel amount for the diesel engine is injectable in two stages in an air flow to improve the mixture, wherein the diesel oil for the first stage (9b) by means of the diesel oil-water emulsion in the subsequent mixing chamber (4b) in front of the output chamber (6) the air flow is insertable and the diesel oil for the second stage (9a) is injectable directly into the combustion chamber of the cylinder heads. This results in a small amount of nitrogen oxide during combustion.
Description
Beschreibungdescription
Technisches Gebiet [0001] Die vorliegende Erfindung betrifft einen aufgeladenen Dieselmotor gemäss dem Oberbegriff des PatentanspruchsTechnical Field The present invention relates to a supercharged diesel engine according to the preamble of the claim
1.1.
Stand der Technik [0002] Ein Dieselmotor, gemäss Fig. 2, stellt schematisch einen 4-Zylinder-Motor nach dem Stand der Technik dar. In diesem Dieselmotor wird die Ansaugluft in einem vorgeschalteten Turbolader-Kompressor (1 a) vorkomprimiert, danach in einem Ladeluftkühler (2) vorgekühlt, worauf dann die Ansaugluft über ein Abblase-Ventil (3) und über die Drosselklappe (5) und Ansaugkrümmer (6) in den vier Zylindern des Dieselmotors (7) verteilt wird.PRIOR ART A diesel engine, according to FIG. 2, schematically represents a 4-cylinder engine according to the prior art. In this diesel engine, the intake air is pre-compressed in an upstream turbocharger compressor (1 a), then in one Charge air cooler (2) pre-cooled, whereupon the intake air is distributed via a blow-off valve (3) and via the throttle valve (5) and intake manifold (6) in the four cylinders of the diesel engine (7).
[0003] Der Dieselbrennstoff strömt durch die Leitung (9) unter dem Einsatz einer Hochdruck Pumpe mit über 1000 bar in den Brennstoff-Verteilkrümmer, um dann in die zum Dieselmotor gehörenden Zylinderköpfe des Mehrzylinder-Motors direkt eingespritzt zu werden.The diesel fuel flows through the line (9) using a high pressure pump with over 1000 bar in the fuel distribution manifold, in order to then be injected directly into the cylinder heads of the multi-cylinder engine belonging to the diesel engine.
[0004] Eine Erhöhung der Leistung lässt sich mit erhöhtem Ladeluftdruck und durch mehrstufige Turbolader (im Bild nicht dargestellt) und somit erhöhter Luftmenge in den Zylindern und entsprechend wesentlich mehr Dieselöl-Einspritzung in den Brennraum des Zylinders erzielen, was trotz extrem hohem Dieselöl-Einspritzdruck zu extrem hoher Entstehung von NOx-Emissionen führt.An increase in performance can be achieved with increased charge air pressure and by multi-stage turbocharger (not shown in the picture) and thus increased air volume in the cylinders and correspondingly much more diesel oil injection into the combustion chamber of the cylinder, which despite extremely high diesel oil injection pressure leads to extremely high levels of NOx emissions.
[0005] Der Grund ist darin zu sehen, dass die schlechte Mischung der Luft mit dem Dieselöl im Brennraum nach der Einspritzung die lokale Konzentrationsverteilung des Dieselöls in dem Brennraum sehr inhomogen gestaltet, wobei dieser Zustand zu lokalen Temperaturspitzen führt, welche entsprechend hohe NOx-Werte verursachen.The reason for this is that the poor mixture of air with the diesel oil in the combustion chamber after the injection makes the local concentration distribution of the diesel oil in the combustion chamber very inhomogeneous, this state leading to local temperature peaks, which correspondingly high NOx values cause.
[0006] Zwar wird versucht, über Abgasrückführung und -Reinigung (Oxydationskatalysator, Partikelfilter und Stickoxydkatalysator) die NOx-Werte zu reduzieren, aber wie die neueste Erfahrung zeigt, haben diese Massnahmen einen limitierten Einfluss, d.h., die NOx-Werte bleiben hoch, dies trotz extrem hohen Brennstoff-Einspritzdruck und weiteren beschriebenen Massnahmen.Attempts are being made to reduce the NOx values via exhaust gas recirculation and purification (oxidation catalyst, particle filter and nitrogen oxide catalyst), but as recent experience shows, these measures have a limited influence, ie the NOx values remain high despite extremely high fuel injection pressure and other measures described.
Darstellung der Erfindung [0007] Die vorliegende im Patentanspruch 1 definierte Erfindung führt zu einer homogeneren Dieselöl-Konzentrationsverteilung im Brennraum unmittelbar nach der Einspritzung, da die direkt eingespritzte Dieselölmenge in den Brennraum der Zylinderköpfe infolge zweistufiger Einspritzung auf 100% reduziert wird. Die n% der Dieselölmenge der ersten Stufe die in einer nachfolgenden Mischkammer (4b) als Emulsion der Luft beigemischt werden, welche Emulsion eine zuvor in einer ersten Mischkammer (4a) erzeugte Dieselöl-Wasser-Emulsion ist, führt zu einer homogenen Vormischung der Dieselöl-Wasser-Emulsion mit der Luft, die in den Zylinder eingeführt wird (siehe Fig. 1). Dadurch wird die Dieselöl-Wasser-Emulsion vollständig mit der verwirbelten Luft in der nachfolgenden Mischkammer (4b) vermischt, die lokale Konzentrationsverteilung in dem Brennraum wird dadurch homogener.DESCRIPTION OF THE INVENTION The present invention defined in claim 1 leads to a more homogeneous diesel oil concentration distribution in the combustion chamber immediately after the injection, since the quantity of diesel oil injected directly into the combustion chamber of the cylinder heads is reduced to 100% as a result of two-stage injection. The n% of the amount of diesel oil in the first stage which is added to the air as an emulsion in a subsequent mixing chamber (4b), which emulsion is a diesel oil-water emulsion previously produced in a first mixing chamber (4a), leads to a homogeneous premixing of the diesel oil Water emulsion with the air that is introduced into the cylinder (see Fig. 1). As a result, the diesel oil-water emulsion is completely mixed with the swirled air in the subsequent mixing chamber (4b), the local concentration distribution in the combustion chamber is thus more homogeneous.
[0008] Eine Selbstzündung des Dieselöl-Wasser-Emulsion-Luftgemisches bis zum Brennraum ist nicht zu erwarten, da es sich um eine magere Mischung handelt und die Wassertropfen in der Emulsion eine Zündung verzögern und auch die Russbildung unterdrücken. Ausserdem kann mittels eines Flammensensors die Dieselölmenge in der Leitung (9b) reduziert werden.A self-ignition of the diesel oil-water emulsion-air mixture to the combustion chamber is not to be expected, since it is a lean mixture and the water drops in the emulsion delay ignition and also suppress soot formation. In addition, the amount of diesel oil in line (9b) can be reduced by means of a flame sensor.
[0009] Der Wasserbedarf (aufbereitetes Wasser) ist gering, nur 15 Volumen-% der durch die Leitung (9b) strömenden Dieselölmenge, die wiederum nur n% (ca. 30 bis 35%) der gesamten Dieselölmenge darstellt.The water requirement (treated water) is low, only 15% by volume of the amount of diesel oil flowing through line (9b), which in turn represents only n% (approx. 30 to 35%) of the total amount of diesel oil.
[0010] Eine Rückgewinnung einer gewissen Wassermenge durch Abkühlung des Abgases, ausreichend für die Kondensation des Wassers, und Rückführung in die Wasserleitung (12) (Fig. 1), nicht dargestellt, wäre eine Alternative, um den Wasserbedarf von aussen zu reduzieren, bzw. zu eliminieren.A recovery of a certain amount of water by cooling the exhaust gas, sufficient for the condensation of the water, and return to the water pipe (12) (Fig. 1), not shown, would be an alternative to reduce the water requirement from the outside, or to eliminate.
[0011] Bei den benzinbetriebenen Motoren mit direkter Einspritzung kann die hier beschriebene zweistufige Einspritzung auch verwendet werden, welche zur Erzielung einer besseren Verbrennung und Reduktion des Russausstosses führt.In the gasoline-powered engines with direct injection, the two-stage injection described here can also be used, which leads to better combustion and reduction of soot emissions.
Beschreibung der Figuren [0012]Description of the Figures [0012]
Fig. 1: Schematische Darstellung eines aufgeladenen Dieselmotors mit zweistufiger Brennstoffeinspritzung: 1 Turbolader, 2 Ladeluftkühler, 3 Abblase-Ventil, 4a Kammer zur Erzeugung einer Teilmenge Dieselöl-WasserEmulsion und 4b zur vollkommenen Vormischung der Teilmenge Dieselöl-Wasser-Emulsion mit der Luft, 5 Drosselklappe, 6 Ansaugkrümmer, 7 Mehrzylinder(4 im Bild)-Dieselmotor, 8a/b Auslasskollektor und Abgasleitung, 11 Abgas-Reinigung und -Steuerungssystem, 9 Dieselöl-Zufuhrleitung mit 9b Erste-Stufe-Leitung und 9a Zweite-Stufe-Hochdruck-Leitung, 10 Dieselöl-Verteilsystem, 12 WasserleitungFig. 1: Schematic representation of a supercharged diesel engine with two-stage fuel injection: 1 turbocharger, 2 charge air cooler, 3 blow-off valve, 4a chamber for generating a partial quantity of diesel oil-water emulsion and 4b for complete premixing of the partial quantity of diesel oil-water emulsion with the air, 5 Throttle valve, 6 intake manifolds, 7 multi-cylinder (4 in the picture) diesel engine, 8a / b exhaust collector and exhaust line, 11 exhaust gas cleaning and control system, 9 diesel oil supply line with 9b first-stage line and 9a second-stage high-pressure line , 10 diesel oil distribution system, 12 water pipe
CH 713 369 B1CH 713 369 B1
Fig. 2: Schematische Darstellung eines aufgeladenen Dieselmotors, nach dem Stand der Technik: 1 Turbolader, 2 Ladeluftkühler, 3 Abblase-Ventil, 5 Drosselklappe, 6 Ansaugkrümmer, Mehrzylinder(4 im Bild)-Dieselmotor, 8a/b Auslasskollektor und Abgasleitung, 11 Abgas-Reinigung und -Steuerungssystem, 9 Hochdruck-Brennstoff-Zufuhrleitung.Fig. 2: Schematic representation of a turbocharged diesel engine, according to the prior art: 1 turbocharger, 2 charge air cooler, 3 blow-off valve, 5 throttle valve, 6 intake manifold, multi-cylinder (4 in the picture) diesel engine, 8a / b exhaust collector and exhaust pipe, 11 Exhaust gas cleaning and control system, 9 high pressure fuel supply lines.
Claims (5)
Priority Applications (1)
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CH00115/17A CH713369B1 (en) | 2017-01-31 | 2017-01-31 | Charged diesel engine. |
Applications Claiming Priority (1)
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CH00115/17A CH713369B1 (en) | 2017-01-31 | 2017-01-31 | Charged diesel engine. |
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CH713369A2 CH713369A2 (en) | 2018-07-31 |
CH713369B1 true CH713369B1 (en) | 2019-08-30 |
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CN115217615B (en) * | 2022-04-06 | 2023-08-15 | 广州汽车集团股份有限公司 | Scavenging device and scavenging method |
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