EP0849463A1 - Zylinderkopf für Brennkraftmaschinen - Google Patents
Zylinderkopf für Brennkraftmaschinen Download PDFInfo
- Publication number
- EP0849463A1 EP0849463A1 EP97120815A EP97120815A EP0849463A1 EP 0849463 A1 EP0849463 A1 EP 0849463A1 EP 97120815 A EP97120815 A EP 97120815A EP 97120815 A EP97120815 A EP 97120815A EP 0849463 A1 EP0849463 A1 EP 0849463A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- groove
- valve opening
- gas exchange
- cylinder head
- channel
- 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
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 18
- 238000003754 machining Methods 0.000 claims abstract description 27
- 238000005266 casting Methods 0.000 claims description 17
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000000926 separation method Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 25
- 230000007704 transition Effects 0.000 description 11
- 238000003801 milling Methods 0.000 description 7
- 238000005520 cutting process Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012792 core layer Substances 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000036346 tooth eruption Effects 0.000 description 1
Images
Classifications
-
- 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
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
- F02F1/4285—Shape or arrangement of intake or exhaust channels in cylinder heads of both intake and exhaust channel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/0009—Cylinders, pistons
- B22D19/0018—Cylinders, pistons cylinders with fins
-
- 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
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F2001/244—Arrangement of valve stems in cylinder heads
- F02F2001/245—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis
-
- 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
- F02F2200/00—Manufacturing
- F02F2200/06—Casting
Definitions
- the invention relates to a cylinder head for internal combustion engines according to the preamble of claim 1, for example known from DE 36 03 582 C1 or DE 195 02 342 A1 emerges.
- Cylinder heads for internal combustion engines are intricately shaped Components made by casting.
- the casting cores point for molding the inner surface of the gas exchange channels an inevitable scatter from workpiece to workpiece Offset from an ideal position of the core.
- the desired The target position of the inner surface of the gas exchange valves is through the position of the associated valve opening in the combustion chamber side Boundary wall of the cylinder head determined. Because of of the core offset is at the gas exchange channels in the cast Raw state in the area close to the opening for valve opening towards increasing machining allowance provided at the valve opening to the extent of at least the maximum permissible offset corresponds. This results in a cutting depth spread of about twice the offset.
- This inside Material addition is then machined in such a way that that the inner surface of the gas exchange channels are offset-free passes into the valve opening.
- the object of the invention is that of the generic type Cylinder head to improve the machining allowance on the one hand in the area of the gas exchange channels near the valve offset-free using a straight milling cutter can be processed, but still in the area the convex wall sections are more aerodynamic Surface gradient is available.
- the compensation groove can be practically without additional costs during the casting process be generated. Only the casting cores are needed for the gas exchange channels with a negative corresponding to the groove shape To be provided with a circumferential bead.
- the advantage of the invention lies in a simple, rational and inexpensive processing of the channel end with simultaneous Reduction of the spread of flow losses in the Gas exchange channels.
- double valve engines the so-called tumbling - a circulation flow into the combustion chamber incoming gases with the axis of rotation lying in the longitudinal direction of the engine -
- the selected intensity of the Tumbling is in interaction with other combustion-relevant Engine parameters responsible for an orderly and desired combustion process in a certain way.
- An inadmissible strong and uncontrolled changes in tumbling interferes with the compromise chosen for a particular engine design and has a negative effect on the combustion noise and / or the exhaust gas values.
- FIG. 1 shows a section of a cast cylinder head 1 for an internal combustion engine, in which in the combustion chamber side Boundary wall 2 a circular valve opening 3 and a gas exchange duct 4 leading there - in the present case an inlet duct - is arranged.
- the illustrated embodiment of the cylinder head has two parallel behind each combustion chamber lying valve openings and a trousers branching Inlet channel, in which a separating rib 18 between the Valve openings are provided.
- the inner surface 5 of the gas exchange channels 4 is in the casting mold is inserted into the casting cores.
- These casting cores are subject to a certain position tolerance despite all care with a maximum permissible tolerance field of, for example, ⁇ 1 mm in all directions. Accordingly, the inner channel surface also faces a different one from workpiece to workpiece, offset within this tolerance range the position of the machined valve opening 3 on, which is machined as a reference contour on the cylinder head becomes.
- the gas exchange channels in the cast raw state near the opening Area with a machining allowance increasing towards the valve opening 7 provided.
- machining allowance 7 corresponds to the valve opening to the extent of at least the said maximum permissible offset, expediently about 10% more than that.
- this processing is to be carried out in a straight line Form milling cutter with an ogival contour 15 be carried out for what a simple machine tool and a form cutter with a long service life and high cutting performance can be used.
- a streamlined surface profile can be achieved, i.e. a separation-causing edge at the transition from machined Surface to cast surface is also said to be convex in the critical Area to be avoided.
- the machining allowance is according to the invention 7 a compensating groove 9 in the cast raw state the gas exchange channels provided. It runs in the circumferential direction just above the valve opening and is in cross section flat V-shaped.
- the leveling groove is - based on the direction of flow in the gas exchange channels - at least in the area 12 of a convex to rectilinear channel wall course intended.
- the compensating grooves are particularly on such cylinder heads can be used with advantage where the gas exchange channels in area close to the valve are strongly curved, i.e. their midline 14 there is curved with a radius of curvature R, which is approximately 1.0 to 2.5 times the inside diameter D of the valve opening 3 corresponds.
- R radius of curvature
- the gas exchange channels pass into the valve opening with a slight curvature, is when the end of the duct is machined from the valve opening edge forming less flow unfavorable.
- the gas exchange ducts steeply into the valve opening run in, butt the cast surface and the machined Surface at the resulting transition edge very flat, so that the flow largely follows such a surface course is able to follow free of detachments.
- the optimal location, the course, circumferential extent and cross-sectional shape the compensation groove must be checked by the designer in individual cases according to the respective, structurally given Environmental conditions of the cylinder head are developed. Independently however, the following can generally be said of this:
- the distance a of the compensating groove above the top edge the recess 20 for a valve seat ring corresponds to approximately 20 up to 30% of the clear diameter D of the valve opening.
- the compensating groove can be in a corresponding distance above the valve seat will.
- the leveling groove runs at least roughly Approximation in a plane that is approximately perpendicular to the channel center line stands. Its cross-section is like a pillow Constriction shaped.
- the groove flanks 10 run approximately pointed in the middle to the groove base 11 and are in Cross-section convex shaped and curved free of stall, i.e. the flanks of the compensation groove are in cross section a radius of curvature r or r 'of at least about 18 mm or curved longer.
- the groove base 11 lies outside of the ideal course 21 of the Inner surface, so that not only no machining allowance in this area is provided, but the real inner surface of the gas exchange channel compared to the ideal course mentioned locally excessive.
- the measured for the channel tangent 17 The depth t of the groove is - at least at the circumferential point of the greatest surface curvature in the direction of flow - about the same the maximum core offset.
- the compensating groove is designed in cross section and arranged that in an extreme position of the casting core, in the the peripheral part of the casting core with the compensating groove of the The contour is most closely approximated in the middle of the valve opening of the form cutter in the fully immersed state through the groove base runs.
- FIGS. 3 and 6 show the state of an extreme core offset shown to the left, i.e. here is the casting core with of the compensating groove 9 molding circumferential section extremely Valve opening offset. Due to a corresponding optimization of location, cross-sectional shape and course of the invention Compensating groove cuts the form cutter 15 in this Condition just the material below the opening side lower flank surface 10 'just completely gone, so that the processing surface 8 'at the location of the former groove base 11 merges tangentially into the upper groove flank 10. In this state of extreme core dislocation arise - At least at the circumferential point shown in Figure 6 on the right of the inlet duct - no steps, edges or grooves that could affect the flow near the wall 13. Despite strong ones Core misalignment and simple processing therefore runs close to the wall Flow 13 undisturbed.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
- Fig. 1
- einen partiellen Schnitt durch einen Zylinderkopf im Bereich eines Einlaßkanales und der Ventilöffnung, wobei eine versatzfreie Lage der gegossenen Innenoberfläche des Einlaßkanales dargestellt ist,
- Fig. 2
- eine vergrößerte Einzeldarstellung des Querschnittes der Ausgleichsrille (Einzelheit II aus Figur 1) vor der zerspanenden Bearbeitung des Kanalüberganges in die Ventilöffnung,
- Fig. 3
- eine zu Figur 2 völlig analoge Darstellung der Einzelheit II bei extremem Versatz der Innenoberfläche in der einen Richtung, bei dem der mit der Ausgleichsrille versehene Umfangsbereich an die Ventilöffnung angenähert ist,
- Fig. 4
- eine weitere zu Figur 2 völlig analoge Darstellung der Einzelheit II bei extremem Versatz der Innenoberfläche in die anderen Richtung, bei dem der mit der Ausgleichsrille versehene Umfangsbereich von der Ventilöffnung abgerückt ist und
- Fig. 5, 6 und 7
- jeweils die Einzelheiten nach den Figuren 2, 3 bzw. 4 nach dem spanabhebenden Abarbeiten der Bearbeitungszugabe sowie die Ausbildung der wandnahen Einlaßströmung im Übergangsbereich.
Claims (9)
- Gegossener Zylinderkopf für eine Brennkraftmaschine, mit wenigstens einer, in der brennraumseitigen Begrenzungswand des Zylinderkopfes angeordneten, kreisrunden Ventilöffnung und einem zu der Ventilöffnung führenden Gaswechselkanal, wobei die innere Gußoberfläche des Gaswechselkanales einen von Werkstück zu Werkstück unterschiedlichen, innerhalb eines bestimmten, maximal zulässigen Toleranzfeldes liegenden Versatz gegenüber der Lage der spanabhebend angearbeiteten Ventilöffnung aufweist, wobei ferner der Gaswechselkanal im gegossenen Rohzustand im öffnungsnahen Bereich mit einer zur Ventilöffnung hin zunehmenden Bearbeitungszugabe versehen ist, welches an der Ventilöffnung im Ausmaß wenigstens dem genannten, maximal zulässigen Versatzmaßes entspricht, wobei der Öffnungsnahe Bereich des Gaswechselkanales innenseitig derart spanabhebend bearbeitet ist, daß die Innenoberfläche des Gaswechselkanales jeweils versatzfrei in die Ventilöffnung übergeht,
gekennzeichnet durch eine im Bereich der Bearbeitungszugabe (16) des Gaswechselkanales (4) im gegossenen Rohzustand vorgesehene, in Umfangsrichtung verlaufende, im Querschnitt flach V-förmig ausgebildete Ausgleichsrille (9) mit folgenden Merkmalen:die Rillenflanken (10) laufen etwa in der Mitte der Ausgleichsrille (9) spitz zum Rillengrund (11) zusammen und sind im Querschnitt konvex geformt und strömungsgünstig, d.h. möglichst abrißfrei gekrümmt,die Ausgleichsrille (9) ist - bezogen auf die Strömungsrichtung im Gaswechselkanal (4) - wenigstens im Bereich (12) eines konvexen Kanalwandungsverlaufes vorgesehen,die Ausgleichsrille (9) verläuft in einem solchen Abstand (a) oberhalb von der Oberkante der Aussparung (20) für einen Ventilsitzring oder - bei Zylinderköpfen ohne Ventilsitzring - oberhalb des Ventilsitzes in der Ventilöffnung (3), der etwa 20 bis 30 % des lichten Durchmessers (D) der Ventilöffnung (3) entspricht,der Rillengrund (11) liegt außerhalb des Idealverlaufes (21) der Innenoberfläche (5), so daß in diesem Bereich nicht nur keine Bearbeitungszugabe vorgesehen ist, sondern die reale Innenoberfläche des Gaswechselkanales (4) gegenüber seinem Idealverlauf (21) lokal ein Übermaß aufweist. - Zylinderkopf nach Anspruch 1,
dadurch gekennzeichnet,
daß die Ausgleichsrille (9) zumindest in grober Annäherung in einer Ebene verläuft, die etwa rechtwinklig zur Kanalmittellinie (14) steht. - Zylinderkopf nach Anspruch 1,
dadurch gekennzeichnet,
daß die Ausgleichsrille (9) im Querschnitt nach Art einer kissenförmigen Einschnürung geformt ist. - Zylinderkopf nach Anspruch 1,
dadurch gekennzeichnet,
daß die Ausgleichsrille (9) im Querschnitt derart ausgebildet und angeordnet ist, daß bei einer Extremlage des Gießkernes, bei der die Umfangspartie des Gießkernes mit der Ausgleichsrille (9) der Ventilöffnung (3) am stärksten angenähert ist, die Kontur (5) des Formfräsers im voll eingetauchten Zustand durch den Rillengrund (11) verläuft. - Zylinderkopf nach Anspruch 1,
dadurch gekennzeichnet,
daß die zur Kanaltangente (17) gemessene Tiefe (t) der Ausgleichsrille (9) etwa gleich dem maximalem Kernversatz ist. - Zylinderkopf nach Anspruch 1,
dadurch gekennzeichnet,
daß die Flanken (10) der Ausgleichsrille (9) im Querschnitt mit einem Krümmungsradius (r, r') von mindestens etwa 18 mm oder länger gekrümmt sind. - Zylinderkopf nach Anspruch 1,
dadurch gekennzeichnet,
daß zumindest die Einlaßkanäle des Zylinderkopfes mit einer Ausgleichsrille (9) vesehen sind. - Zylinderkopf nach Anspruch 1,
dadurch gekennzeichnet,
daß die Ausgleichsrillen (9) an Zylinderköpfen mit im ventilnahen Bereich stark gekrümmten Gaswechselkanälen (4) vorgesehen sind, deren Mittellinie (14) dort mit einen Krümmungsradius (R) gekrümmt ist, der etwa dem 1,0 bis 2,5 fachen des lichten Durchmessers (D) der Ventilöffnung (3) entspricht. - Zylinderkopf nach Anspruch 1,
dadurch gekennzeichnet,
daß bei Zylinderköpfen mit zwei oder mehr Einlaßventilen je Brennraum und Trennrippen (18) zwischen den Ventilöffnungen (3) auch im Bereich der Trennrippe(n) (18) eine Ausgleichsrille (9) vorgesehen ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19653909 | 1996-12-21 | ||
DE19653909A DE19653909C1 (de) | 1996-12-21 | 1996-12-21 | Zylinderkopf für Brennkraftmaschinen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0849463A1 true EP0849463A1 (de) | 1998-06-24 |
EP0849463B1 EP0849463B1 (de) | 2001-10-24 |
Family
ID=7815939
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97120815A Expired - Lifetime EP0849463B1 (de) | 1996-12-21 | 1997-11-27 | Zylinderkopf für Brennkraftmaschinen |
Country Status (3)
Country | Link |
---|---|
US (1) | US6053141A (de) |
EP (1) | EP0849463B1 (de) |
DE (1) | DE19653909C1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005020228B4 (de) * | 2005-04-30 | 2014-08-14 | Audi Ag | Einlasskanalanordnung in einem Zylinderkopf |
DE102005037735B4 (de) * | 2005-08-05 | 2010-07-01 | Nemak Linz Gmbh | Zylinderkopf-Gussrohteil, gegossener Zylinderkopf für Diesel-Verbrennungsmotoren und Verfahren zur Herstellung eines Zylinderkopf-Gussrohteils |
FR2933629A3 (fr) * | 2008-07-10 | 2010-01-15 | Renault Sas | Procede de fabrication d'une culasse comprenant un conduit d'admission semi-usine et culasse correspondante |
US9103277B1 (en) | 2014-07-03 | 2015-08-11 | Daniel Sexton Gurney | Moment-cancelling 4-stroke engine |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7803426A (nl) * | 1977-04-02 | 1978-10-04 | British Leyland Uk Ltd | Dieselmotor en werkwijze voor de vervaardiging daarvan. |
DE3603582C1 (de) | 1986-02-06 | 1987-03-05 | Bayerische Motoren Werke Ag | Verfahren zur spanabhebenden Bearbeitung eines in einem Gussteil angeordneten Kanals |
JPS62157265A (ja) * | 1985-12-27 | 1987-07-13 | Honda Motor Co Ltd | シリンダ−ヘツドの製造方法 |
EP0275841A2 (de) * | 1986-12-23 | 1988-07-27 | FIAT AUTO S.p.A. | Verfahren zur Herstellung eines Ventilsitzes |
EP0281015A2 (de) * | 1987-02-26 | 1988-09-07 | Motoren-Werke Mannheim Aktiengesellschaft | Drallsichel im Einlasskanal einer Brennkraftmaschine |
DE4040948C1 (en) * | 1990-12-20 | 1992-02-20 | Audi Ag, 8070 Ingolstadt, De | Curved gas transfer port in IC engine - incorporates groove in outer side of curve adjacent to valve seating ring |
DE19502342A1 (de) | 1994-02-05 | 1995-08-10 | Volkswagen Ag | Verfahren zum Herstellen eines Ladungswechselkanals einer Brennkraftmaschine |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5444082Y2 (de) * | 1975-06-05 | 1979-12-19 | ||
DE3307115C2 (de) * | 1983-03-01 | 1985-09-05 | Feldmühle AG, 4000 Düsseldorf | Zylinderkopf eines Kolbenmotors |
US4508066A (en) * | 1983-12-27 | 1985-04-02 | Ford Motor Company | Ceramic head for internal combustion engine |
JPH10110650A (ja) * | 1996-10-03 | 1998-04-28 | Nissan Diesel Motor Co Ltd | 内燃機関の排気ポートの構造 |
-
1996
- 1996-12-21 DE DE19653909A patent/DE19653909C1/de not_active Expired - Fee Related
-
1997
- 1997-11-27 EP EP97120815A patent/EP0849463B1/de not_active Expired - Lifetime
- 1997-12-22 US US08/996,209 patent/US6053141A/en not_active Expired - Fee Related
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7803426A (nl) * | 1977-04-02 | 1978-10-04 | British Leyland Uk Ltd | Dieselmotor en werkwijze voor de vervaardiging daarvan. |
JPS62157265A (ja) * | 1985-12-27 | 1987-07-13 | Honda Motor Co Ltd | シリンダ−ヘツドの製造方法 |
DE3603582C1 (de) | 1986-02-06 | 1987-03-05 | Bayerische Motoren Werke Ag | Verfahren zur spanabhebenden Bearbeitung eines in einem Gussteil angeordneten Kanals |
EP0233555A2 (de) * | 1986-02-06 | 1987-08-26 | Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 | Verfahren zur spanabhebenden Bearbeitung eines in einem Gussteil angeordneten Kanals |
EP0275841A2 (de) * | 1986-12-23 | 1988-07-27 | FIAT AUTO S.p.A. | Verfahren zur Herstellung eines Ventilsitzes |
EP0281015A2 (de) * | 1987-02-26 | 1988-09-07 | Motoren-Werke Mannheim Aktiengesellschaft | Drallsichel im Einlasskanal einer Brennkraftmaschine |
DE4040948C1 (en) * | 1990-12-20 | 1992-02-20 | Audi Ag, 8070 Ingolstadt, De | Curved gas transfer port in IC engine - incorporates groove in outer side of curve adjacent to valve seating ring |
DE19502342A1 (de) | 1994-02-05 | 1995-08-10 | Volkswagen Ag | Verfahren zum Herstellen eines Ladungswechselkanals einer Brennkraftmaschine |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 011, no. 388 (M - 652) 18 December 1987 (1987-12-18) * |
Also Published As
Publication number | Publication date |
---|---|
US6053141A (en) | 2000-04-25 |
EP0849463B1 (de) | 2001-10-24 |
DE19653909C1 (de) | 1998-04-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE69300991T2 (de) | Brennkraftmaschine mit geschichteter Verbrennung | |
EP1356885B1 (de) | Scheibenfräser und Schneidplatte | |
DE69902981T3 (de) | Zylinder für eine Zweitaktmaschine mit schichtgeladener Spülung | |
DE2922058C2 (de) | Zylinderkopf einer Hubkolben-Brennkraftmaschine mit innerer Verbrennung | |
WO2013144030A1 (de) | Kurbelwellenfräser | |
EP1272305B1 (de) | Schneideinsatz für nockenwellenfräser | |
EP0771941A1 (de) | Zylinderkopf für Brennkraftmaschine | |
DE19643778A1 (de) | Leichtbaukolben | |
DE3432369C2 (de) | ||
DE102005050210B4 (de) | Schneideinsatz und Fräser | |
EP0849463B1 (de) | Zylinderkopf für Brennkraftmaschinen | |
DE19521347B4 (de) | Ansaugkanalstruktur und Verfahren zu dessen Detailbestimmung | |
EP0281015A2 (de) | Drallsichel im Einlasskanal einer Brennkraftmaschine | |
DE102009040084A1 (de) | Verfahren zur Herstellung eines Kolbens für einen Verbrennungsmotor | |
EP0233555B1 (de) | Verfahren zur spanabhebenden Bearbeitung eines in einem Gussteil angeordneten Kanals | |
DE4029881A1 (de) | Verfahren zum einpassen von ventilsitzringen in brennkraftmaschinen | |
DE3733982A1 (de) | Trapezpleuel | |
DE4342139C1 (de) | Einzylinder-Dieselmotor | |
DE69208254T2 (de) | Mehrzylinder zweitakt brennkraftmaschine | |
EP0932467A1 (de) | Spanendes bearbeitungsverfahren von dreidimensionalen verbindungsflächen | |
DE102008039135B4 (de) | Fräse für eine Kurbelwellen-Fräsvorrichtung und Fräseinsatz und Satz von Fräseinsätzen für einen Fräser für eine Kurbelwellen-Fräseinrichtung | |
DE19502342A1 (de) | Verfahren zum Herstellen eines Ladungswechselkanals einer Brennkraftmaschine | |
EP0641927A1 (de) | Motorkolben mit einer Brennraummulde, Verfahren zu dessen Herstellung und Motor mit Kolben | |
DE9400898U1 (de) | Rollenhebel an einem Gußwerkstoff | |
DE19648908A1 (de) | Bremstrommel und Verfahren zu ihrer Herstellung |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19980416 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): ES FR GB IT |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
AKX | Designation fees paid |
Free format text: ES FR GB IT |
|
RBV | Designated contracting states (corrected) |
Designated state(s): ES FR GB IT |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: DAIMLERCHRYSLER AG |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: 8566 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
17Q | First examination report despatched |
Effective date: 20010321 |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): ES FR GB IT |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20011024 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 20020123 |
|
ET | Fr: translation filed | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20020430 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20041112 Year of fee payment: 8 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20041122 Year of fee payment: 8 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20051127 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20051127 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20060731 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20060731 |