EP1286029B1 - Steuertrieb einer Kolbenbrennkraftmaschine mit variablem Brennraum - Google Patents
Steuertrieb einer Kolbenbrennkraftmaschine mit variablem Brennraum Download PDFInfo
- Publication number
- EP1286029B1 EP1286029B1 EP02016200A EP02016200A EP1286029B1 EP 1286029 B1 EP1286029 B1 EP 1286029B1 EP 02016200 A EP02016200 A EP 02016200A EP 02016200 A EP02016200 A EP 02016200A EP 1286029 B1 EP1286029 B1 EP 1286029B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- guide rail
- crankshaft
- camshaft
- control drive
- cylinder head
- 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 - Fee Related
Links
Images
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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/022—Chain drive
-
- 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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
Definitions
- the invention relates to a control drive of a piston internal combustion engine with a variable Combustion chamber with the features mentioned in the preamble of claim 1.
- An adjustment unit for the timing drive of an engine is known from the DE 199 25 268 A1.
- the writing showed a crankshaft mounted in eccentric rings of an engine.
- the eccentric bearing rings can be rotated in the motor housing arranged and rotatable by an adjusting unit.
- By turning the bearing rings the position of the crankshaft relative to the cylinder and thus its compression ratio changed.
- the changing center distance between cam and Crankshaft results in a changing chain tension that crosses across tensioning wheel movable to the course of the chain center is compensated.
- the tension wheel is adjusted proportionally to the change in position of the crankshaft and secures one constant tension of the timing drive. It is intended to over the tension wheel to couple an adjustment mechanism with the adjustment unit for the crankshaft and thus to ensure a proportional adjustment of the tensioning wheel.
- the object of the invention is to provide a timing drive for the crankshaft To create drive at least one camshaft, which is more variable for an engine Compression, in which the center distance between the camshaft and crankshaft can be changed compensates for the changed center distance while maintaining a constant phase position between the crankshaft and camshaft.
- the adjusting device can influence the length compensation of the traction mechanism of the control drive, so that even when adjusting the center distances between the drive and Output gear of the timing drive a relative rotation of the drive and driven gear is largely avoided.
- the invention is explained on a piston internal combustion engine with a variable combustion chamber, where the change in the combustion chamber and thus the change in the Center distance between crank and camshaft by adjusting the against each other movably arranged upper and lower part 2 of the piston internal combustion engine he follows.
- the upper part 1 can be part of the crankcase or with the crankcase top connected cylinder head of the engine, while the Lower part 2 is the lower part of the crankcase.
- the solution according to the invention can also in other known ways of adjusting the axis positions of drive and driven gear are transmitted without the essential features to deviate from the invention.
- the exemplary embodiments presented are therefore in to be considered in all respects as illustrative and not restrictive.
- the control drive according to the invention of a piston internal combustion engine with variable combustion chamber and thus with a variable compression from a drive wheel 10 and at least one driven wheel 6, which have a traction means 5 are interconnected.
- a known timing chain acts as traction means 5, a timing belt or the like.
- the drive wheel 10 is on a not shown Crankshaft of the piston internal combustion engine (engine) while the driven gear 6 is arranged on a camshaft of the engine, not shown. Warehousing the crankshaft takes place in the lower part 2 of the crankcase and that of the camshaft in the cylinder head connected to the crankcase upper part.
- the timing gear consists of two camshafts, each with an output gear 6 is arranged.
- On the empty run of the traction means 5 is a known one Tensioning rail 4 arranged with a chain tensioner 9, which the traction means 5 of Control drive preloaded accordingly.
- Upper part 1 or cylinder head and a lower part 2 of the crankcase are against each other movably arranged, creating a variable combustion chamber and thus a different one Compression of the engine is adjustable.
- By the relative movement of Upper part 1 and lower part 2 of the crankcase changes the center distance of the Crankshaft opposite the camshaft.
- a positively guided guide rail on the tension side of the timing gear 3 arranged.
- the guide rail 3 is in its lower region via a pivot point 13 hinged to the lower part 2 of the crankcase.
- the guide rail is in the upper part 3 with an adjusting device arranged on the upper part 1 or on the cylinder head 14 connected, which causes a positive guidance of the guide rail 3.
- the adjusting device 14 consists of one on the upper part 1 and Cylinder head pivoted at a connecting rod articulation point 8 connecting rod 7, the is connected to an articulation point 15 arranged on the guide rail 3.
- the arrangement of the connecting rod articulation point 8 on the upper part 1, the length of the connecting rod 7 and the arrangement of the articulation point 15 on the guide rail 3 takes place in such a way that the pivoting angle of the connecting rod 7 and the guide rail 3 is variable Free length of the traction device 5 according to the change in center distance of the crank and Compensates camshaft.
- FIG. 2 A variant of the solution according to the invention is shown in FIG. 2.
- the adjustment device 14 is arranged on the guide rail 3 Form curve 11 and a bolt arranged on the upper part 1 or on the cylinder head 12, the bolt 12 abutting the shape curve 11 of the guide rail 3.
- the Shape curve 11 of the adjusting device 14 is designed such that the pivoting angle the guide rail 3 corresponding to the variable free length of the traction means 5 compensates for the change in center distance of the crankshaft and camshaft.
- the shape curve 11 can also be fixed with the upper part 1 or with the cylinder head be connected and act against a pivot point on the guide rail 3.
- the compression is changed by moving the one against the other arranged crankcase parts 1 and cylinder head and lower part 2.
- the guide rail 3 rotatably mounted on the lower part 2 through the on the upper part 1 or the connecting rod 7 pivoted to the cylinder head.
- the guide rail 3 With a relative movement from upper part 1 and lower part 2 swings in the direction of maximum compression the guide rail 3 in the direction of the traction means 3 and is the same together the chain tensioner 9 and the tensioning rail 4 the resulting greater free length of the traction device 3.
- the pivoting angle of the connecting rod 7 and thus the Guide rail 3 is so proportional to the change in center distance of the crank and Camshaft designed that a constant phase position of the crankshaft and camshaft is secured.
- the guide rail 3 with a relative movement of the upper part 1 and lower part 2 due to the the shape curve 11 shifting contact point of the stud 12 is pivoted.
- the shape curve 11 is also designed so that when the variable free length of the traction means 5 a constant phase position of cam and Crankshaft is secured.
Description
- Fig. 1:
- eine schematische Darstellung des erfindungsgemäßen Steuertriebes im Querschnitt,
- Fig. 2:
- eine Variante der erfindungsgemäßen Lösung.
- 1
- Oberteil des Kurbelgehäuses und Zylinderkopf
- 2
- Unterteil des Kurbelgehäuses
- 3
- Führungsschiene
- 4
- Spannschiene
- 5
- Zugmittel
- 6
- Abtriebsrad
- 7
- Pleuel
- 8
- Pleuelanlenkpunkt
- 9
- Kettenspanner
- 10
- Antriebsrad
- 11
- Formkurve
- 12
- Bolzen
- 13
- Drehpunkt der Führungsschiene
- 14
- Verstelleinrichtung
- 15
- Anlenkpunkt der Führungsschiene
Claims (7)
- Steuertrieb einer Kolbenbrennkraftmaschine mit variablem Brennraum mit folgender Bauart:einem aus Ober- mit Zylinderkopf und Unterteil bestehenden Kurbelgehäuse, das zur Verstellung des Verdichtungsverhältnisses der Kolbenbrennkraftmaschine gegeneinander verstellbar angeordnet sind,einem bei Verstellung des Verdichtungsverhältnisses veränderbaren Achsabstand zwischen einer Kurbelwelle und wenigstens einer Nockenwelle,einem mit der Kurbelwelle der Kolbenbrennkraftmaschine verbundenem Antriebsrad, das über ein Zugmittel mit wenigstens einem Abtriebsrad der Nockenwelle für den Steuertrieb verbunden ist,einer Lagerung der Kurbelwelle im Unterteil des Kurbelgehäuses und einer Lagerung der Nockenwelle im mit dem Oberteil des Kurbelgehäuses verbundenen Zylinderkopf,einer am Leertrum angeordneten, auf das Zugmittel wirkende Spannvorrichtung,
- Steuertrieb nach Anspruch 1,
dadurch gekennzeichnet, dass das Oberteil (1) das Oberteil des Kurbelgehäuses oder der mit dem Oberteil des Kurbelgehäuses verbundene Zylinderkopf ist. - Steuertrieb nach Anspruch 1 und 2,
dadurch gekennzeichnet, dass die Verstelleinrichtung (14) aus einem am Oberteil (1) beziehungsweise am Zylinderkopf schwenkbar an einem Pleuelanlenkpunkt (8) angelenkten Pleuel (7) besteht, das mit einem an der Führungsschiene (3) angeordneten Anlenkpunkt (15) verbunden ist. - Steuertrieb nach Anspruch 1 bis 2,
dadurch gekennzeichnet, dass die Anordnung des Pleuelanlenkpunktes (8) am Oberteil (1), die Länge des Pleuels (7) und die Anordnung des Anlenkpunktes (15) an der Führungsschiene (3) so erfolgt, dass der Einschwenkwinkel des Pleuels (7) und der Führungsschiene (3) die variable freie Länge des Zugmittels (5) entsprechend der Achsabstandsänderung von Kurbel- und Nockenwelle ausgleicht. - Steuertrieb nach Anspruch 1 und 2,
dadurch gekennzeichnet, dass die Verstelleinrichtung (14) aus einer an der Führungsschiene (3) angeordneten Formkurve (11) und einem fest am Oberteil (1) beziehungsweise am Zylinderkopf angeordneten Bolzen (12) besteht, wobei der Bolzen (12) an der Formkurve (11) der Führungsschiene (3) anliegt. - Steuertrieb nach Anspruch 1 und 2,
dadurch gekennzeichnet, dass die Verstelleinrichtung (14) aus einer fest am Oberteil (1) beziehungsweise am Zylinderkopf angeordneten Formkurve (11) besteht, die an einem Punkt der Führungsschiene (3) anliegt. - Steuertrieb nach Anspruch 1, 5 und 6,
dadurch gekennzeichnet, dass die Formkurve (11) der Verstelleinrichtung (14) derart gestaltet ist, dass der Einschwenkwinkel der Führungsschiene (3) die variable freie Länge des Zugmittels (5) entsprechend der Achsabstandsänderung von Kurbel- und Nockenwelle augleicht.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10141981 | 2001-08-23 | ||
DE10141981A DE10141981C1 (de) | 2001-08-23 | 2001-08-23 | Steuertrieb einer Kolbenbrennkraftmaschine mit variablem Brennraum |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1286029A1 EP1286029A1 (de) | 2003-02-26 |
EP1286029B1 true EP1286029B1 (de) | 2004-01-21 |
Family
ID=7696781
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02016200A Expired - Fee Related EP1286029B1 (de) | 2001-08-23 | 2002-07-22 | Steuertrieb einer Kolbenbrennkraftmaschine mit variablem Brennraum |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1286029B1 (de) |
DE (2) | DE10141981C1 (de) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19631875A1 (de) * | 1996-08-07 | 1998-02-12 | Bayerische Motoren Werke Ag | Kettentrieb-Einheit für eine Brennkraftmaschine |
DE19918592B4 (de) * | 1999-04-23 | 2013-05-23 | Fev Gmbh | Stellantrieb zur Positionierung eines Stellmittels |
DE19925268B4 (de) * | 1999-06-01 | 2011-07-21 | FEV Motorentechnik GmbH, 52078 | Kettenspanner für eine Kolbenbrennkraftmaschine mit variablem Brennraum |
-
2001
- 2001-08-23 DE DE10141981A patent/DE10141981C1/de not_active Expired - Fee Related
-
2002
- 2002-07-22 EP EP02016200A patent/EP1286029B1/de not_active Expired - Fee Related
- 2002-07-22 DE DE50200216T patent/DE50200216D1/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE10141981C1 (de) | 2003-04-17 |
DE50200216D1 (de) | 2004-02-26 |
EP1286029A1 (de) | 2003-02-26 |
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