EP0837226B1 - Valve driven internal combustion engine with compression variation arrangement - Google Patents
Valve driven internal combustion engine with compression variation arrangement Download PDFInfo
- Publication number
- EP0837226B1 EP0837226B1 EP97116224A EP97116224A EP0837226B1 EP 0837226 B1 EP0837226 B1 EP 0837226B1 EP 97116224 A EP97116224 A EP 97116224A EP 97116224 A EP97116224 A EP 97116224A EP 0837226 B1 EP0837226 B1 EP 0837226B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sleeve
- actuator
- compression
- valve
- internal combustion
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant
- F01L3/085—Valve cages
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D15/00—Varying compression ratio
- F02D15/04—Varying compression ratio by alteration of volume of compression space without changing piston stroke
Definitions
- the invention relates to a valve-controlled internal combustion engine in the Preamble of claim 1 described type.
- Such an internal combustion engine shows e.g. the patent abstract of Japan to the JP-Offenlegungsschrift 58 165 544 with a complex adjusting device.
- the adjustment device to change the compression in this valve-controlled internal combustion engine comprises a controlled in a cylinder head guided sliding Sleeve with an opening arranged in the sleeve shell, via which an in Cylinder head extending duct section of a gas exchange duct with one of the sleeve formed combustion chamber-side channel section is connected, wherein a channel opening delimited by the sleeve on the combustion chamber side by means of a lift valve is controlled.
- This known adjustment device forms in principle when closed by the lift valve Sleeve a piston, by means of its variable position a compression volume can be changed in a cylinder depending on the operating point.
- adversely in this known adjustment device is that the globe valve and the sleeve each actuated via assigned cams on a common control shaft are, the respective cams on the common control shaft are non-rotatably arranged in a fixed rotation angle assignment.
- DE 38 01 102 A describes a further adjustment device for changing the compression known in an internal combustion engine with a secondary piston in the cylinder head arranged sleeve with a gas exchange valve, in which the secondary piston to change the compression independently of the control of the gas exchange valve is adjustable.
- a disadvantage with the secondary piston or with the sleeve in a recess of the cylinder head moving channel section which requires a complex cylinder head design.
- the invention has for its object in a generic internal combustion engine to design the adjustment device for changing the compression in such a way that both control devices are decoupled with a simple construction of the cylinder head.
- the advantage of the invention can be seen in the fact that it is arranged in the sleeve Actuator for stroke actuation of the valve e.g. via a variable stroke valve opening cross section adapted to the respective operating point is achieved and independent of the control of the sleeve.
- actuator separate valve train results in a further advantageous Way that the two controls do not work against each other and thus the known principle of a displacement piston in the compression chamber of the cylinder an internal combustion engine is preserved at all times.
- the invention is based on a preferred example shown in the drawing described.
- a valve-controlled internal combustion engine 1 shown only in sections is with an adjusting device 2 for changing the compression in the combustion chamber 3 between the piston 4 in the cylinder 5 of the internal combustion engine 1 and a combustion chamber calotte 6 equipped in a cylinder head 7.
- the adjustment device 2 includes a in the cylinder head 7 guided sliding sleeve 8 with one in the sleeve shell 9 arranged opening 10 through which a running in the cylinder head 7 Channel section 11 'of a gas exchange channel 11 with one of the sleeve 8 formed combustion chamber-side channel section 11 "in connection.
- the of the Sleeve 8 channel opening 12 limited on the combustion chamber side is by means of a lift valve 13 controlled.
- the valve lift actuating device is preferably an electromagnetic one Actuator 14.
- a hydraulic or a pneumatic actuator is also conceivable.
- the sleeve 8 via a preferably operating point-dependent, as an eccentric 15 cam disc designed to change the compression separately in the cylinder head displaceable.
- each of the Facilities optimal to the respective operating point of the internal combustion engine 1 be adjusted.
- An effective compression change is achieved in particular that several Similar lift valves 13 per combustion chamber 3, each with an adjusting device 2 are combined. Furthermore, the change in compaction can be increased by that inlet and outlet-side lift valves 13 each with an adjusting device 2 are combined.
- the respective actuator 14 can be used as an actuating device with a variable Valve stroke can be designed, whereby adapted on the intake side depending on the operating point Valve opening cross sections for advantageous inflow control are possible.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Valve Device For Special Equipments (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Description
Die Erfindung bezieht sich auf eine ventilgesteuerte Brennkraftmaschine der im
Oberbegriff des Patentanspruches 1 beschriebenen Bauart.The invention relates to a valve-controlled internal combustion engine in the
Preamble of
Eine derartige Brennkraftmaschine zeigt z.B. das patent abstract of Japan zu der JP-Offenlegungsschrift 58 165 544 mit einer bauaufwendig gestalteten Verstelleinrichtung.Such an internal combustion engine shows e.g. the patent abstract of Japan to the JP-Offenlegungsschrift 58 165 544 with a complex adjusting device.
Eine weitere Brennkraftmaschine ist aus der EP 0 330 638 A bekannt. Die Verstelleinrichtung zur Verdichtungsänderung bei dieser ventilgesteuerten Brennkraftmaschine umfaßt eine in einem Zylinderkopf schiebebeweglich geführt gesteuerte Hülse mit einer im Hülsenmantel angeordneten Durchbrechung, über die ein im Zylinderkopf verlaufender Kanalabschnitt eines Gaswechselkanals mit einem von der Hülse gebildeten brennraumseitigen Kanalabschnitt in Verbindung steht, wobei eine von der Hülse begrenzte brennraumseitige Kanalmündung mittels eines Hubventils gesteuert ist.Another internal combustion engine is known from EP 0 330 638 A. The adjustment device to change the compression in this valve-controlled internal combustion engine comprises a controlled in a cylinder head guided sliding Sleeve with an opening arranged in the sleeve shell, via which an in Cylinder head extending duct section of a gas exchange duct with one of the sleeve formed combustion chamber-side channel section is connected, wherein a channel opening delimited by the sleeve on the combustion chamber side by means of a lift valve is controlled.
Diese bekannte Verstelleinrichtung bildet im Prinzip bei durch das Hubventil geschlossener Hülse einen Kolben, mittels dessen variabler Position ein Verdichtungsvolumen in einem Zylinder betriebspunktabhängig veränderbar ist. Nachteilig bei dieser bekannten Verstelleinrichtung ist, daß das Hubventil sowie die Hülse jeweils über zugeordnete Kurvenscheiben auf einer gemeinsamen Steuerwelle betätigt sind, wobei die jeweiligen Kurvenscheiben auf der gemeinsamen Steuerwelle in einer festen Drehwinkelzuordnung drehfest angeordnet sind. Mit dieser derart gekoppelten Steuerungszuordnung von Hülsen-Bewegung und Hubventil-Bewegung kann keine der Funktionen einer betriebspunktangepaßten Verdichtung sowie einem betriebspunktangepaßten Ventilöffnungsquerschnitt gesondert realisiert werden.This known adjustment device forms in principle when closed by the lift valve Sleeve a piston, by means of its variable position a compression volume can be changed in a cylinder depending on the operating point. adversely in this known adjustment device is that the globe valve and the sleeve each actuated via assigned cams on a common control shaft are, the respective cams on the common control shaft are non-rotatably arranged in a fixed rotation angle assignment. With this like that coupled control assignment of sleeve movement and lift valve movement cannot do any of the functions of compression adjusted to the operating point and a valve opening cross-section adapted to the operating point become.
Aus der DE 38 01 102 A ist eine weitere Verstelleinrichtung zur Verdichtungsänderung bei einer Brennkraftmaschine bekannt mit einer im Zylinderkopf als Nebenkolben angeordneten Hülse mit einem Gaswechselventil, bei der zwar der Nebenkolben zur Verdichtungsänderung unabhängig von der Steuerung des Gaswechselventils verstellbar ist. Jedoch ist hierbei nachteilig ein mit dem Nebenkolben bzw. mit der Hülse in einer Ausnehmung des Zylinderkopfes mitbewegter Kanalabschnitt, was eine aufwendige Zylinderkopfgestaltung erfordert.DE 38 01 102 A describes a further adjustment device for changing the compression known in an internal combustion engine with a secondary piston in the cylinder head arranged sleeve with a gas exchange valve, in which the secondary piston to change the compression independently of the control of the gas exchange valve is adjustable. However, a disadvantage with the secondary piston or with the sleeve in a recess of the cylinder head moving channel section, which requires a complex cylinder head design.
Der Erfindung liegt die Aufgabe zugrunde, bei einer gattungsgemäßen Brennkraftmaschine die Verstelleinrichtung zur Verdichtungsänderung derart zu gestalten, daß beide Steuerungseinrichtungen entkoppelt sind bei einfachem Aufbau des Zylinderkopfes.The invention has for its object in a generic internal combustion engine to design the adjustment device for changing the compression in such a way that both control devices are decoupled with a simple construction of the cylinder head.
Der Vorteil der Erfindung ist darin zu sehen, daß mit einem in der Hülse angeordneten Aktuator zur Hubbetätigung des Ventils z.B. über einen variablen Hub ein dem jeweiligen Betriebspunkt angepaßter Ventilöffnungsquerschnitt erzielt ist und zwar unabhängig von der Steuerung der Hülse. Mit dem durch einen erfindungsgemäß angeordneten Aktuator gesonderten Ventiltrieb ergibt sich in weiterer vorteilhafter Weise, daß die beiden Steuerungen nicht gegeneinander wirken und somit das bekannte Prinzip eines Verdrängerkolbens im Verdichtungsraum des Zylinders einer Brennkraftmaschine jederzeit erhalten ist. Weiter sind die mit der vorgeschlagenen Ausgestaltung der Steuerung der Hülse die auf die durch das Ventil geschlossene Hülse wirkenden Brennraumdrücke sicher beherrschbar. The advantage of the invention can be seen in the fact that it is arranged in the sleeve Actuator for stroke actuation of the valve e.g. via a variable stroke valve opening cross section adapted to the respective operating point is achieved and independent of the control of the sleeve. With the one according to the invention arranged actuator separate valve train results in a further advantageous Way that the two controls do not work against each other and thus the known principle of a displacement piston in the compression chamber of the cylinder an internal combustion engine is preserved at all times. Next are those with the proposed Design of the control of the sleeve on the through the valve closed sleeve acting combustion chamber pressures safely manageable.
In Ausgestaltung der Erfindung ist ein durch seine kompakte Bauweise elektromagnetischer Aktuator bevorzugt, es ist aber auch ein hydraulischer oder ein pneumatischer Aktuator möglich.In an embodiment of the invention is an electromagnetic due to its compact design Actuator preferred, but it is also a hydraulic or a pneumatic actuator possible.
Die Erfindung ist anhand eines bevorzugten, in der Zeichnung dargestellten Beispiels beschrieben.The invention is based on a preferred example shown in the drawing described.
Eine lediglich abschnittsweise dargestellte, ventilgesteuerte Brennkraftmaschine 1
ist mit einer Verstelleinrichtung 2 zur Verdichtungsänderung im Brennraum 3 zwischen
dem Kolben 4 im Zylinder 5 der Brennkraftmaschine 1 und einer Brennraumkalotte
6 in einem Zylinderkopf 7 ausgerüstet. Die Verstelleinrichtung 2 umfaßt eine
im Zylinderkopf 7 schiebebeweglich geführt gesteuerte Hülse 8 mit einer im Hülsenmantel
9 angeordneten Durchbrechung 10, über die ein im Zylinderkopf 7 verlaufender
Kanalabschnitt 11' eines Gaswechselkanals 11 mit einem von der Hülse 8
gebildeten brennraumseitigen Kanalabschnitt 11" in Verbindung steht. Die von der
Hülse 8 brennraumseitig begrenzte Kanalmündung 12 ist mittels eines Hubventils
13 gesteuert.A valve-controlled
Zur Erzielung unabhängiger Steuerungen für das Hubventil 13 einerseits und für die
Hülse 8 der Verstelleinrichtung 2 andererseits ist vorgesehen, daß das Hubventil 13
mit einer in der Hülse 8 angeordneten, als Aktuator 14 gestalteten Hub-Betätigungseinrichtung
in Antriebsverbindung steht und daß die Hülse 8 der Verstelleinrichtung
2 zur Verdichtungsänderung unabhängig von dem Aktuaktor 14 gesondert
schiebebeweglich steuerbar ist.To achieve independent controls for the
Vorzugsweise ist die Ventilhub-Betätigungseinrichtung ein elektromagnetischer
Aktuator 14. Ein hydraulischer oder ein pneumatischer Aktuator ist ebenfalls denkbar.The valve lift actuating device is preferably an electromagnetic one
Zur Erzielung einer betriebssicheren und im Aufbau einfachen Verstelleinrichtung 2 ist die Hülse 8 über eine vorzugsweise betriebspunktabhängig gesteuerte, als Exzenter 15 gestaltete Kurvenscheibe zur Verdichtungsänderung gesondert im Zylinderkopf verschiebbar. To achieve a reliable and easy to set up adjustment device 2 is the sleeve 8 via a preferably operating point-dependent, as an eccentric 15 cam disc designed to change the compression separately in the cylinder head displaceable.
Mit den entkoppelten Steuerungen für das Hubventil 13 einerseits und für die Hülse
8 der Verstelleinrichtung 2 zur Verdichtungsänderung andererseits kann jede der
Einrichtungen optimal auf den jeweiligen Betriebspunkt der Brennkraftmaschine 1
angepaßt werden.With the decoupled controls for the
Eine wirksame Verdichtungsänderung ist insbesondere dadurch erreicht, daß mehrere
gleichartige Hubventile 13 je Brennraum 3 mit jeweils einer Verstelleinrichtung
2 kombiniert sind. Weiter kann die Verdichtungsänderung dadurch gesteigert sein,
daß ein- und auslaßseitige Hubventile 13 jeweils mit einer Verstelleinrichtung 2
kombiniert sind.An effective compression change is achieved in particular that several
Ferner kann der jeweilige Aktuator 14 als Betätigungseinrichtung mit variablem
Ventilhub gestaltet sein, wodurch ansaugseitig betriebspunktabhängig angepaßte
Ventilöffnungsquerschnitte zur vorteilhaften Einströmsteuerung möglich sind.Furthermore, the
Claims (5)
- A valve-control internal combustion engine comprising at device for adjusting the compression,characterised in thatwherein the adjusting device (2) comprises a sleeve (8) slidable and guided in a cylinder head (7) and bounding a duct portion (11") whichis associated on the combustion-chamber side with a periodically actuated gate valve (13) whichis connected for drive purposes to an actuator in the form of a stroke-actuating device, whereinin order to alter the compression the sleeve (8) of the adjusting device (2) is slidable and controllable separately and independently of the actuator (14),the sleeve (8) and the duct portion (11") are disposed so as to be movable relative to a portion (11') of a gas change duct (11) extending in the cylinder head (7), whereinthe duct portion (11') on the cylinder-head side is connected via an aperture (10) in the sleeve jacket (9) to the duct portion (11") on the sleeve side, andthe mouth (12) of the duct portion (11") on the combustion-chamber side is controlled by a gate valve (13) driven by an actuator (14) disposed in the sleeve (8), whereinthe sleeve (8) is movable separately in the cylinder head (7) by a cam (15) controlled in dependence on the operating point in order to alter the compression.
- An engine according to claim 1, characterised in that an electromagnetic or a hydraulic or a pneumatic actuator (14) is provided.
- An engine according to claims 1 to 2, characterised in that a number of similar gate valves (13) per combustion chamber (3) are each combined with an adjusting device (2).
- An engine according to any of claims 1 to 3, characterised in that gate valves (13) on the inlet side and the outlet side are each combined with an adjusting device (2).
- An engine according to any of claims 1 to 4, characterised in that each actuator (14) is in the form of an actuating device with a variable valve stroke.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19642469A DE19642469C1 (en) | 1996-10-15 | 1996-10-15 | Valve-controlled internal combustion engine with an adjustment device for changing the compression |
| DE19642469 | 1996-10-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0837226A1 EP0837226A1 (en) | 1998-04-22 |
| EP0837226B1 true EP0837226B1 (en) | 2002-02-06 |
Family
ID=7808788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97116224A Expired - Lifetime EP0837226B1 (en) | 1996-10-15 | 1997-09-18 | Valve driven internal combustion engine with compression variation arrangement |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0837226B1 (en) |
| DE (2) | DE19642469C1 (en) |
| ES (1) | ES2170313T3 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10106685A1 (en) * | 2001-02-14 | 2002-08-29 | Karl-Otto Noelle | Increasing power of internal combustion engines with stroke volume enhancement, involves changing cylinder bore diameters or replacing cylinder sleeves for production crankcase, etc. |
| DE10128938A1 (en) * | 2001-06-18 | 2003-01-02 | Hjs Fahrzeugtechnik Gmbh & Co | Particle filter operating by means of soot combustion and used in diesel engines comprises filtering surface made from sintered metal between crude gas side and pure gas side |
| DE10227769A1 (en) * | 2002-06-21 | 2004-01-08 | Daimlerchrysler Ag | Compression change arrangement for combustion engine, has control element that can be moved independently of gas charging valve position and that is coaxially arranged to gas charging valve forming valve seat |
| DE10311229B4 (en) * | 2003-03-14 | 2005-03-31 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Internal combustion engine with variable compression ratio |
| EP2336521A1 (en) * | 2009-12-15 | 2011-06-22 | Wärtsilä Schweiz AG | A cylinder arrangement for an internal combustion engine |
| DE102011008128B4 (en) * | 2011-01-07 | 2017-10-26 | Suheyla Lemouré | Reciprocating internal combustion engine with variable compression ratio |
| DE102013216182A1 (en) | 2013-08-14 | 2015-02-19 | Schaeffler Technologies Gmbh & Co. Kg | Adjustment device, in particular for internal combustion engines |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58165544A (en) * | 1982-03-25 | 1983-09-30 | Hitachi Zosen Corp | Internal-combustion engine with variable compression ratio device |
| DE3801102A1 (en) * | 1988-01-16 | 1989-07-27 | Erich Schmid | Device for a reciprocating piston engine with variable combustion chamber |
| FI78969C (en) * | 1988-02-23 | 1989-10-10 | Jorma Pohjola | Combustion engine valve mechanism. |
| EP0676533B1 (en) * | 1994-04-09 | 1997-09-24 | Adam Opel Ag | Inlet passage system for an internal combustion engine |
-
1996
- 1996-10-15 DE DE19642469A patent/DE19642469C1/en not_active Expired - Fee Related
-
1997
- 1997-09-18 ES ES97116224T patent/ES2170313T3/en not_active Expired - Lifetime
- 1997-09-18 DE DE59706288T patent/DE59706288D1/en not_active Expired - Fee Related
- 1997-09-18 EP EP97116224A patent/EP0837226B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| ES2170313T3 (en) | 2002-08-01 |
| EP0837226A1 (en) | 1998-04-22 |
| DE19642469C1 (en) | 1998-05-07 |
| DE59706288D1 (en) | 2002-03-21 |
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