DE102005030988A1 - Directly injectable internal combustion engine comprises a piston with a depression shaped so that the distance between the center of the spark path and the lowest point of the depression is specified - Google Patents
Directly injectable internal combustion engine comprises a piston with a depression shaped so that the distance between the center of the spark path and the lowest point of the depression is specified Download PDFInfo
- Publication number
- DE102005030988A1 DE102005030988A1 DE102005030988A DE102005030988A DE102005030988A1 DE 102005030988 A1 DE102005030988 A1 DE 102005030988A1 DE 102005030988 A DE102005030988 A DE 102005030988A DE 102005030988 A DE102005030988 A DE 102005030988A DE 102005030988 A1 DE102005030988 A1 DE 102005030988A1
- Authority
- DE
- Germany
- Prior art keywords
- piston
- internal combustion
- combustion engine
- trough
- spark plug
- 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.)
- Withdrawn
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
- 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 direkteinspritzende Otto-Brennkraftmaschine mit wenigstens einem einen Brennraum aufweisenden Zylinder nach der im Oberbegriff von Anspruch 1 näher definierten Art.The The invention relates to a direct injection gasoline engine with at least one Cylinder having combustion chamber according to the preamble of claim 1 closer defined type.
Derartige in Großserien hergestellte Brennkraftmaschinen sind meist sehr weit entwickelt und es werden moderne Technologien mit teilweise komplexen Verfahren zum Betreiben derselben eingesetzt. Zu den neueren Entwicklungen zählen unter anderem der variable Ventiltrieb, die Entdrosselung durch Abgasrückführung sowie die Ladungsschichtung. Durch verschiedene Maßnahmen wurde des weiteren auch eine Erhöhung der Verdichtung erreicht. Allerdings stößt die Entwicklung insbesondere bei der mechanischen und der thermodynamischen Auslegung der Brennkraftmaschinen an Grenzen, die neuer Lösungsansätze bedürfen.such in large series Manufactured internal combustion engines are usually very well developed and there are modern technologies with sometimes complex procedures used to operate the same. To the newer developments counting including the variable valve train, the Entdrosselung by Exhaust gas recirculation as well the charge stratification. By various measures was further also an increase reached the compression. However, the development is particularly noticeable the mechanical and thermodynamic design of internal combustion engines on borders that require new solutions.
In thermodynamischer Hinsicht gilt dies insbesondere für die Gemischentflammung innerhalb des Brennraums, für welche die folgenden Zündbedingungen gelten: Das Gemisch muss zündfähig sein, es muss an irgendeiner Stelle in dem zündfähigen Gemisch die Zündtemperatur des Gemisches überschritten sein und darüber hinaus muss die Zufuhr von Wärme aus der frei werdenden Verbrennungswärme schneller erfolgen als die Abführung von Wärme.In From a thermodynamic point of view, this applies in particular to mixture ignition inside the combustion chamber, for which the following ignition conditions apply: the mixture must be flammable, at any point in the ignitable mixture, the ignition temperature must be of the mixture exceeded be and above In addition, the supply of heat from the released heat of combustion take place faster than the discharge of Warmth.
Aufgrund des teilweise hohen Restgasgehalts, erhöhter Ladungsbewegungen oder einer geschichteten Ladung können sich die Entflammungsbedingungen soweit verschlechtern, dass es nicht nur zu einer verschleppten Verbrennung, sondern teilweise auch zu Aussetzern der Entflammung kommen kann. Der Entflammungsprozess wird des weiteren durch eine hohe Verdichtung, eine große Ventilüberschneidung sowie eine aus Gründen des Bauraums außermittig angeordnete Zündkerze beeinflusst.by virtue of the partially high residual gas content, increased charge movements or a layered charge can the flammability conditions worsen so much that it not only to a delayed combustion, but partly can also come to dropouts of the inflammation. The ignition process is further characterized by a high compression, a large valve overlap as well as one for reasons of the installation space off-center arranged spark plug affected.
Wenn durch eine Erhöhung der Verdichtung und der Ventilüberschneidung der Kolben mit sehr tiefen Ventiltaschen und einem Dach zum Ausgleich der Verdichtung ausgeführt werden muss, kann es insbesondere bei späten Zündzeitpunkten in der frühen Phase der Entflammung zu einer erhöhten Wärmeabfuhr aus dem Flammkern kommen, wenn dieser den Kolben berührt. Dies kann zu den oben erwähnten Aussetzern der Entflammung führen.If by an increase the compression and the valve overlap the piston with very deep valve pockets and a roof to compensate for Compaction performed It may be, especially at late firing points in the early phase the inflame to an increased heat dissipation come out of the flame core when it touches the piston. This can to the above mentioned Loss of ignition lead.
Wenn die Zündkerze außermittig angeordnet ist, steigert dies noch die genannten Probleme, da die Entflammung nicht nur durch eine erhöhte Ladungsbewegung und hohe Restgasanteile, sondern auch durch die zeitliche Zuordnung der Gemischeinspritzung und des Zündzeitpunkts erschwert werden kann.If the spark plug eccentrically is arranged, this still increases the problems mentioned, since the Inflammation not only by increased charge movement and high Residual gas shares, but also by the temporal allocation of the mixture injection and the ignition timing can be difficult.
Gattungsgemäße Brennkraftmaschinen
gehen aus der
Es ist daher Aufgabe der vorliegenden Erfindung, eine direkteinspritzende Otto-Brennkraftmaschine zu schaffen, bei welcher in jedem Zustand, in dem die Brennkraftmaschine betrieben wird, eine sichere Entflammung des eingespritzten Kraftstoffs gewährleistet ist.It is therefore an object of the present invention, a direct injection Otto internal combustion engine to create, in which in each state, in which the internal combustion engine is operated, a safe ignition of the injected fuel is ensured.
Erfindungsgemäß wird diese Aufgabe durch die in Anspruch 1 genannten Merkmale gelöst.According to the invention this Problem solved by the features mentioned in claim 1.
Durch die erfindungsgemäße Mulde, die im oberen Totpunkt des Kolbens einen Abstand zu der Mitte der Funkenstrecke der Zündkerze von mindestens 8 mm herstellt, ist ein ausreichender Mindestabstand zwischen dem Ort der Entstehung des Zündfunkens und dem Kolbenboden an dem der Zündkerze gegenüberliegenden Bereich des Kolbens gewährleistet. Dadurch wird das Entflammungsverhalten des durch die Zündkerze entzündeten Kraftstoff-Luft-Gemisches derart beeinflusst, dass sichergestellt ist, dass die Abführung von Wärme aus der Verbrennung langsamer erfolgt als die Zufuhr der Wärme, so dass eine sichere Entflammung und ein schnelles Ausbreiten der Flammenfront sichergestellt ist.By the trough according to the invention, at the top dead center of the piston at a distance to the center of Spark gap of the spark plug of at least 8 mm, is a sufficient minimum distance between the place where the spark originated and the piston crown on the spark plug opposite Ensured area of the piston. This will ignite the flaming behavior of the spark plug inflamed Fuel-air mixture influenced in such a way that ensured is that exhaustion of heat from the combustion takes place slower than the supply of heat, so that a safe ignition and a quick spread of the flame front is ensured.
Eine konstruktiv sehr einfache und zugleich wirkungsvolle Lösung zur Herstellung des erfindungsgemäßen Mindestabstandes zwischen dem tiefsten Punkt des Bodens der Mulde und der Mitte der Funkenstrecke der Zündkerze ergibt sich, wenn die Mulde eine Tiefe von 1–6 mm aufweist.A structurally very simple and at the same time effective solution to Production of the minimum distance according to the invention between the lowest point of the bottom of the trough and the middle of the trough Spark gap of the spark plug results when the trough has a depth of 1-6 mm.
Des Weiteren kann vorgesehen sein, dass die Mulde innerhalb einer flächenmäßig größeren Mulde angeordnet ist. Auf diese Weise lassen sich mit der erfindungsgemäßen Brennkraftmaschine auch andere Verfahren ausführen, zu denen entsprechende Kolbengeometrien erforderlich sind.Of Furthermore, it can be provided that the trough within a larger area trough is arranged. In this way, with the internal combustion engine according to the invention also perform other procedures to which appropriate piston geometries are required.
Weitere vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den restlichen Unteransprüchen. Nachfolgend sind Ausführungsbeispiele der Erfindung anhand der Zeichnung prinzipmäßig dargestellt.Further yield advantageous embodiments and refinements of the invention from the remaining subclaims. Below are exemplary embodiments of the invention shown in principle with reference to the drawing.
Dabei zeigen:there demonstrate:
In
an sich bekannter Weise weist der Zylinder
Um
eine sichere Entflammung des Kraftstoff-Luft-Gemisches und ein schnelles
Ausbreiten der entstehenden Flammenfront zu gewährleisten, wozu die Zufuhr
von Wärme
aus der frei werdenden Verbrennungswärme schneller erfolgen muss
als die Abführung
von Wärme,
weist der Kolbenboden
In
dem Ausführungsbeispiel
gemäß
Bei
dem in
Bei
den in den
Während bei
dem Kolben
Die
Größe der Mulde
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005030988A DE102005030988A1 (en) | 2005-07-02 | 2005-07-02 | Directly injectable internal combustion engine comprises a piston with a depression shaped so that the distance between the center of the spark path and the lowest point of the depression is specified |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005030988A DE102005030988A1 (en) | 2005-07-02 | 2005-07-02 | Directly injectable internal combustion engine comprises a piston with a depression shaped so that the distance between the center of the spark path and the lowest point of the depression is specified |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102005030988A1 true DE102005030988A1 (en) | 2007-01-04 |
Family
ID=37545083
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102005030988A Withdrawn DE102005030988A1 (en) | 2005-07-02 | 2005-07-02 | Directly injectable internal combustion engine comprises a piston with a depression shaped so that the distance between the center of the spark path and the lowest point of the depression is specified |
Country Status (1)
Country | Link |
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DE (1) | DE102005030988A1 (en) |
Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1580089A (en) * | 1967-10-13 | 1969-08-29 | ||
DE1576001A1 (en) * | 1967-01-14 | 1970-05-21 | Daimler Benz Ag | Externally ignited internal combustion engine with stratified charge |
GB1280057A (en) * | 1969-04-18 | 1972-07-05 | Polychemie Gmbh | Improvements in or relating to the stabilisation of lead dioxide |
US4442808A (en) * | 1979-12-11 | 1984-04-17 | Nissan Motor Company, Limited | Combustion chamber for spark ignition internal combustion engine |
DE4020262A1 (en) * | 1990-06-26 | 1992-01-09 | Daimler Benz Ag | Combustion chamber for IC engine - is formed by depression in piston crown |
DE4415073A1 (en) * | 1994-04-29 | 1995-11-02 | Fev Motorentech Gmbh & Co Kg | IC engine using alcohol-based fuel with spark ignition and direct fuel injection |
DE4430685A1 (en) * | 1994-08-30 | 1996-03-07 | Stefan Laskowski | Piston shape for IC engine |
DE69402137T2 (en) * | 1993-07-22 | 1997-10-09 | Toyota Motor Co Ltd | Gasoline engine with fuel injection valve for direct injection into the cylinder |
DE19624227A1 (en) * | 1996-06-18 | 1998-01-02 | Suhler Fahrzeugwerk Gmbh | Two stroke IC engine |
DE3903842C2 (en) * | 1988-02-10 | 1998-12-10 | Toyota Motor Co Ltd | Otto engine with direct fuel injection |
DE19723182A1 (en) * | 1997-06-03 | 1998-12-10 | Reinhard Dr Ing Latsch | Internal combustion engine with direct fuel injection and external ignition |
DE3943816C2 (en) * | 1988-02-10 | 2001-01-25 | Toyota Motor Co Ltd | Direct-injection Otto-cycle 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 |
EP1529938A2 (en) * | 2003-11-06 | 2005-05-11 | Nissan Motor Co., Ltd. | Direct fuel injection engine |
-
2005
- 2005-07-02 DE DE102005030988A patent/DE102005030988A1/en not_active Withdrawn
Patent Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1576001A1 (en) * | 1967-01-14 | 1970-05-21 | Daimler Benz Ag | Externally ignited internal combustion engine with stratified charge |
FR1580089A (en) * | 1967-10-13 | 1969-08-29 | ||
GB1280057A (en) * | 1969-04-18 | 1972-07-05 | Polychemie Gmbh | Improvements in or relating to the stabilisation of lead dioxide |
US4442808A (en) * | 1979-12-11 | 1984-04-17 | Nissan Motor Company, Limited | Combustion chamber for spark ignition internal combustion engine |
DE3903842C2 (en) * | 1988-02-10 | 1998-12-10 | Toyota Motor Co Ltd | Otto engine with direct fuel injection |
DE3943816C2 (en) * | 1988-02-10 | 2001-01-25 | Toyota Motor Co Ltd | Direct-injection Otto-cycle engine |
DE4020262A1 (en) * | 1990-06-26 | 1992-01-09 | Daimler Benz Ag | Combustion chamber for IC engine - is formed by depression in piston crown |
DE69402137T2 (en) * | 1993-07-22 | 1997-10-09 | Toyota Motor Co Ltd | Gasoline engine with fuel injection valve for direct injection into the cylinder |
DE4415073A1 (en) * | 1994-04-29 | 1995-11-02 | Fev Motorentech Gmbh & Co Kg | IC engine using alcohol-based fuel with spark ignition and direct fuel injection |
DE4430685A1 (en) * | 1994-08-30 | 1996-03-07 | Stefan Laskowski | Piston shape for IC engine |
DE19624227A1 (en) * | 1996-06-18 | 1998-01-02 | Suhler Fahrzeugwerk Gmbh | Two stroke IC engine |
DE19723182A1 (en) * | 1997-06-03 | 1998-12-10 | Reinhard Dr Ing Latsch | Internal combustion engine with direct fuel injection and external ignition |
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 |
EP1529938A2 (en) * | 2003-11-06 | 2005-05-11 | Nissan Motor Co., Ltd. | Direct fuel injection 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 | ||
8127 | New person/name/address of the applicant |
Owner name: DAIMLERCHRYSLER AG, 70327 STUTTGART, DE |
|
8127 | New person/name/address of the applicant |
Owner name: DAIMLER AG, 70327 STUTTGART, DE |
|
8120 | Willingness to grant licences paragraph 23 | ||
R120 | Application withdrawn or ip right abandoned | ||
R120 | Application withdrawn or ip right abandoned |
Effective date: 20120608 |