DE10254594A1 - Profiled top surface of piston for internal combustion engine with direct fuel injection has double depression under injector and has raised rim with peak surrounding outer depression - Google Patents
Profiled top surface of piston for internal combustion engine with direct fuel injection has double depression under injector and has raised rim with peak surrounding outer depression Download PDFInfo
- Publication number
- DE10254594A1 DE10254594A1 DE10254594A DE10254594A DE10254594A1 DE 10254594 A1 DE10254594 A1 DE 10254594A1 DE 10254594 A DE10254594 A DE 10254594A DE 10254594 A DE10254594 A DE 10254594A DE 10254594 A1 DE10254594 A1 DE 10254594A1
- Authority
- DE
- Germany
- Prior art keywords
- fuel
- piston
- internal combustion
- trough
- combustion engine
- 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.)
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Links
Classifications
-
- 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
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
- F02B23/10—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder
- F02B23/104—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder the injector being placed on a side position of the cylinder
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
- F02F3/26—Pistons having combustion chamber in piston head
-
- 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
- F02B75/00—Other engines
- F02B75/12—Other methods of operation
- F02B2075/125—Direct injection in the combustion chamber for spark ignition engines, i.e. not in pre-combustion chamber
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
Description
Die Erfindung betrifft eine Hubkolbenbrennkraftmaschine, insbesondere eines Kraftfahrzeuges, insbesondere Ottomotor, mit Fremdzündung, direkter Einspritzung eines Kraftstoffes und einem Kolben, welcher einen Kolbenboden aufweist, wobei der Kolbenboden eine Kraftstoffmulde und eine Strömungs- bzw. Luftmulde aufweist, die von einer Erhebung des Kolbenbodens voneinander getrennt sind, welche einen höchsten Punkt des Kolbenbodens ausbildet, gemäß dem Oberbegriff des Anspruchs 1. Die Erfindung betrifft ferner ein Verfahren zum Betreiben einer derartigen Hubkolbenbrennkraftmaschine gemäß dem Oberbegriff des Anspruchs 3.The invention relates to a reciprocating piston internal combustion engine, in particular a motor vehicle, in particular a gasoline engine, with Ignition, direct injection of a fuel and a piston, which has a piston crown, the piston crown a fuel trough and a flow or Has air trough, from one elevation of the piston head from each other are separated, which are the highest Point of the piston head forms, according to the preamble of the claim 1. The invention further relates to a method for operating such Reciprocating internal combustion engine according to the preamble of claim 3.
Um einen Ottomotor mit Direkteinspritzung stabil
in einem verbrauchsgünstigen,
sogenannten Schichtbetrieb stabil betreiben zu können, ist eine besondere Kolbenbodenform
erforderlich, damit eine gute Gemischbildung und anschließend sichere
Entflammung sichergestellt ist. Diese Kolbenbodenform sorgt dabei
für eine
entsprechende Führung
des eingespritzten Kraftstoffes und der eingeleiteten Verbrennungsluft.
So ist aus der
Der Erfindung liegt die Aufgabe zugrunde, eine Hubkolbenbrennkraftmaschine der obengenannten Art zur Verfügung zu stellen, welche im Schichtbetrieb sowohl für kleine als auch große Lasten hinsichtlich Betriebssicherheit, Verbrennungsstabilität, Schadstoftemission und Verbrauch optimiert ist.The invention has for its object a Reciprocating internal combustion engine of the type mentioned above are available too which in shift operation for both small and large loads with regard to operational safety, combustion stability, pollutant emissions and consumption is optimized.
Diese Aufgabe wird erfindungsgemäß durch eine Hubkolbenbrennkraftmaschine der o.g. Art mit den in Anspruch 1 gekennzeichneten Merkmalen und durch ein Verfahren der o.g. Art mit den in Anspruch 3 gekennzeichneten Merkmalen gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind in den abhängigen Ansprüchen angegeben.This object is achieved by a Reciprocating piston internal combustion engine of the above Kind with those characterized in claim 1 Characteristics and by a process of the above Kind with the in claim 3 marked features solved. Advantageous embodiments of the invention are specified in the dependent claims.
Dazu ist es bei einer Hubkolbenbrennkraftmaschine der o.g. Art erfindungsgemäß vorgesehen, daß in einer Wandung der Kraftstoffmulde wenigstens eine Stufenkante ausgebildet ist, an der eine Steigung der Wandung einen Sprung aufweist, wobei diese Stufenkante einen großen Kraftstoffmuldenteil von einem kleinen Kraftstoffmuldenteil derart abtrennt, daß der kleine Kraftstoffmuldenteil vollständig innerhalb des großen Kraftstoffmuldenteils angeordnet ist.It is for a reciprocating piston internal combustion engine the above Art provided according to the invention that in a Wall of the fuel trough formed at least one step edge is on which a slope of the wall has a jump, this Step edge a big one Fuel trough part from a small fuel trough part like this separates that the small fuel compartment part completely within the large fuel compartment part is arranged.
Bei einem Verfahren der o.g. Art ist es erfindungsgemäß vorgesehen, daß für jede Stufenkante eine Lastgrenze in einem Last-Drehzahl-Kennfeld bestimmt wird, wobei in einem Schichtbetrieb die Einspritzung von Kraftstoff bzgl. Menge und Zeitpunkt derart durchgeführt wird, daß unterhalb einer jeweiligen Lastgrenze im wesentlichen nur diejenigen Muldenteile durchströmt werden, welche innerhalb der dieser Lastgrenze zugeordneten Stufenkante ausgebildet sind und oberhalb dieser Lastgrenze zusätzlich der jeweils an diese Stufenkante angrenzende große Muldenteil durchströmt wird.In a procedure of the above kind it is provided according to the invention that one for each step edge Load limit is determined in a load-speed map, where in a shift operation the injection of fuel in terms of quantity and time carried out in this way will that below a respective load limit essentially only those trough parts flows through which are within the step edge assigned to this load limit are trained and above this load limit in addition is flowed through in each case adjacent to this step edge large trough part.
Dies hat den Vorteil, daß wenigstens zwei separate Kraftstoffmulden ineinander geschachtelt sind, wobei durch diese besondere Formgebung des Kolbenbodens im Bereich der Kraftstoffmulde eine Verbrennungsstabilität der Brennkraftmaschine im sogenannten Schichtbetrieb bei besserem Verbrauchswert und geringeren Emissionen über einen größeren Lastbereich erhöht wird. Es steht praktisch ein Kolben zur Verfügung, der sowohl für kleine Lasten als auch für große Lasten im Schichtbetrieb optimiert ist.This has the advantage that at least two separate fuel wells are nested one inside the other, whereby due to this special shape of the piston crown in the area of Fuel well a combustion stability of the internal combustion engine in the so-called Shift operation with better consumption value and lower emissions over a larger load range elevated becomes. There is practically a plunger available, which is suitable for both small Loads as well for size Loads in shift operation is optimized.
Beispielsweise ist die Stufenkante als offene Linie oder als geschlossene Linie an der Wandung umlaufend ausgebildet.For example, the step edge as an open line or as a closed line all around the wall educated.
Weitere Merkmale, Vorteile und vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den abhängigen Ansprüchen, sowie aus der nachstehenden Beschreibung der Erfindung anhand der beigefügten Zeichnungen. Diese zeigen inOther features, advantages and advantageous configurations the invention result from the dependent claims, as well from the following description of the invention with reference to the accompanying drawings. These show in
Durch die unterschiedliche Größe der Kraftstoffmulde
einerseits beschränkt
auf den kleinen Kraftstoffmuldenteil
Beispielsweise wird hierzu in einem Last-Drehzahl-Kennfeld
eine Lastschwelle definiert, unterhalb derer ausschließlich der
kleine Kraftstoftmuldenteil
Die Erfindung wurde lediglich beispielhaft anhand
einer zweistufigen Kraftstoffmulde erläutert. Erfindungsgemäß können auch
zwei oder mehr Stufenkanten
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10254594A DE10254594A1 (en) | 2002-11-22 | 2002-11-22 | Profiled top surface of piston for internal combustion engine with direct fuel injection has double depression under injector and has raised rim with peak surrounding outer depression |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10254594A DE10254594A1 (en) | 2002-11-22 | 2002-11-22 | Profiled top surface of piston for internal combustion engine with direct fuel injection has double depression under injector and has raised rim with peak surrounding outer depression |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10254594A1 true DE10254594A1 (en) | 2004-06-03 |
Family
ID=32240306
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE10254594A Withdrawn DE10254594A1 (en) | 2002-11-22 | 2002-11-22 | Profiled top surface of piston for internal combustion engine with direct fuel injection has double depression under injector and has raised rim with peak surrounding outer depression |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE10254594A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2976978A1 (en) * | 2011-06-24 | 2012-12-28 | Peugeot Citroen Automobiles Sa | PISTON FOR COMBUSTION CHAMBER OF INTERNAL COMBUSTION ENGINE |
CN104047756A (en) * | 2014-06-04 | 2014-09-17 | 邓在积 | Positive covariance engine |
DE102010037156B4 (en) * | 2009-11-26 | 2021-06-17 | Hyundai Motor Co. | Direct fuel injection engine |
Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3386421A (en) * | 1965-03-20 | 1968-06-04 | Daimler Benz Ag | Air compressing injection-type internal combustion engine |
DE4020262C2 (en) * | 1990-06-26 | 1992-06-04 | Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De | |
US5215053A (en) * | 1990-12-19 | 1993-06-01 | Toyota Jidosha Kabushiki Kaisha | Fuel injection control device for an internal combustion engine |
US5505173A (en) * | 1993-07-22 | 1996-04-09 | Toyota Jidosha Kabushiki Kaisha | Spark ignition engine with a fuel injector for injecting fuel directly into the cylinder |
AT1392U1 (en) * | 1996-05-30 | 1997-04-25 | Avl Verbrennungskraft Messtech | INTERNAL COMBUSTION ENGINE |
DE19838868A1 (en) * | 1997-08-08 | 1999-02-11 | Avl List Gmbh | Combustion chamber arrangement for spark ignition IC engine |
DE19835563A1 (en) * | 1998-08-06 | 2000-02-10 | Volkswagen Ag | Four-stroke internal combustion engine with direct injection |
DE19713030C2 (en) * | 1996-04-01 | 2000-02-24 | Avl List Gmbh | Four-stroke internal combustion engine with spark ignition |
DE3943816C2 (en) * | 1988-02-10 | 2001-01-25 | Toyota Motor Co Ltd | Direct-injection Otto-cycle engine |
JP2001041045A (en) * | 1999-07-30 | 2001-02-13 | Suzuki Motor Corp | Combustion chamber structure of engine |
DE10041424A1 (en) * | 1999-08-26 | 2001-04-19 | Avl List Gmbh | Direct fuel injection i.c. engine has each reciprocating piston provided at its end face with raised lip for assisting rotation of cylinder charge, central combustion recess and pocket adjacent fuel injection device |
JP2002295261A (en) * | 2001-03-30 | 2002-10-09 | Mazda Motor Corp | Jump spark ignition type direct injection engine |
FR2835287A1 (en) * | 2002-01-25 | 2003-08-01 | Renault | I.C. engine piston comprises upper face with central point and several cavities able to cooperate with combustion chamber formation |
-
2002
- 2002-11-22 DE DE10254594A patent/DE10254594A1/en not_active Withdrawn
Patent Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3386421A (en) * | 1965-03-20 | 1968-06-04 | Daimler Benz Ag | Air compressing injection-type internal combustion engine |
DE3943816C2 (en) * | 1988-02-10 | 2001-01-25 | Toyota Motor Co Ltd | Direct-injection Otto-cycle engine |
DE4020262C2 (en) * | 1990-06-26 | 1992-06-04 | Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De | |
US5215053A (en) * | 1990-12-19 | 1993-06-01 | Toyota Jidosha Kabushiki Kaisha | Fuel injection control device for an internal combustion engine |
US5505173A (en) * | 1993-07-22 | 1996-04-09 | Toyota Jidosha Kabushiki Kaisha | Spark ignition engine with a fuel injector for injecting fuel directly into the cylinder |
DE19713030C2 (en) * | 1996-04-01 | 2000-02-24 | Avl List Gmbh | Four-stroke internal combustion engine with spark ignition |
AT1392U1 (en) * | 1996-05-30 | 1997-04-25 | Avl Verbrennungskraft Messtech | INTERNAL COMBUSTION ENGINE |
DE19838868A1 (en) * | 1997-08-08 | 1999-02-11 | Avl List Gmbh | Combustion chamber arrangement for spark ignition IC engine |
DE19835563A1 (en) * | 1998-08-06 | 2000-02-10 | Volkswagen Ag | Four-stroke internal combustion engine with direct injection |
JP2001041045A (en) * | 1999-07-30 | 2001-02-13 | Suzuki Motor Corp | Combustion chamber structure of engine |
DE10041424A1 (en) * | 1999-08-26 | 2001-04-19 | Avl List Gmbh | Direct fuel injection i.c. engine has each reciprocating piston provided at its end face with raised lip for assisting rotation of cylinder charge, central combustion recess and pocket adjacent fuel injection device |
JP2002295261A (en) * | 2001-03-30 | 2002-10-09 | Mazda Motor Corp | Jump spark ignition type direct injection engine |
FR2835287A1 (en) * | 2002-01-25 | 2003-08-01 | Renault | I.C. engine piston comprises upper face with central point and several cavities able to cooperate with combustion chamber formation |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010037156B4 (en) * | 2009-11-26 | 2021-06-17 | Hyundai Motor Co. | Direct fuel injection engine |
FR2976978A1 (en) * | 2011-06-24 | 2012-12-28 | Peugeot Citroen Automobiles Sa | PISTON FOR COMBUSTION CHAMBER OF INTERNAL COMBUSTION ENGINE |
CN104047756A (en) * | 2014-06-04 | 2014-09-17 | 邓在积 | Positive covariance engine |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8141 | Disposal/no request for examination |