EP1589196A2 - Hydraulische Einrichtung zur stufenlos variablen Nockenwellenverstellung - Google Patents
Hydraulische Einrichtung zur stufenlos variablen Nockenwellenverstellung Download PDFInfo
- Publication number
- EP1589196A2 EP1589196A2 EP05007186A EP05007186A EP1589196A2 EP 1589196 A2 EP1589196 A2 EP 1589196A2 EP 05007186 A EP05007186 A EP 05007186A EP 05007186 A EP05007186 A EP 05007186A EP 1589196 A2 EP1589196 A2 EP 1589196A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- pendulum
- pressure chamber
- rotor
- outer rotor
- main pressure
- 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.)
- Ceased
Links
- 230000007704 transition Effects 0.000 claims description 11
- 238000002485 combustion reaction Methods 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 5
- 238000013016 damping Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 230000001747 exhibiting effect Effects 0.000 claims description 2
- 125000006850 spacer group Chemical group 0.000 abstract 2
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
Definitions
- the invention relates to a hydraulic device for continuously variable Adjustment of the camshaft of an internal combustion engine with one of a Crankshaft driven outer rotor and one of the camshaft assigned to this relatively rotatable inner rotor, wherein between Inner and outer rotor in the inner rotor on the one hand and in the outer rotor on the other hand pivotally mounted pendulum are arranged, which with between the pendulums lying rotor wings druckbeaufschlagbare Include main pressure chambers and in the rotary end positions to the Rotor blades abut.
- Such devices allow an adjustment of the camshaft relative to the crankshaft and thus the timing of the cam this wave actuated valves and come inlet and / or outlet side for use. Benefits arise in particular with regard to emissions, Fuel consumption, torque curve and power development.
- DE 199 61 567 A1 describes an initially mentioned Device for continuously variable camshaft adjustment, wherein the between inner and outer rotor arranged pendulum straight flanks have and in the Drehendlagen flat on the also straight sides rest against the wing of the inner rotor.
- the flanks of the form Pendulum with the corresponding sides of the wings of the inner rotor wedge-shaped squeezing chambers, from which the oil from the inside to must be displaced externally; There are oil guides provided by the the oil can drain.
- the object of the invention is, while avoiding the disadvantages mentioned dampened application of the pendulum to the corresponding wing sides in to allow the rotary end positions.
- this is the contact surface between pendulum and rotor blades designed such that when investing a pendulum a rotor wing from the main pressure chamber a throttled drain exhibiting secondary pressure chamber is separable.
- a pendulum for pivotal mounting in Inner rotor a cylindrical pendulum head and for pivoting and radial sliding bearing in the outer rotor a cylindrical, frontally flattened pendulum foot on.
- a particularly preferred embodiment of the invention has a Pendulum between pendulum head and pendulum foot with pendulum head and Pendulum foot connected by webs, cylindrical-drop-shaped Pendulum on.
- the transition from pendulum to the pendulum side The bridge has small radii forming a throttle edge at installation and the Transition from pendulum body to pendulum-head-side bar on large radii.
- a rotor blade with the contour of a Pendulum has corresponding contact surface, wherein in the Rotary end positions in the area of the pendulum footbridge from the main pressure chamber a secondary pressure chamber separated and in the transition area from Pendulum body to the pendulum footbridge formed a throttled drain becomes.
- the main pressure chamber is advantageously at least one Outflow channel connected.
- the inner radius of the Ring area of the outer rotor circular shape and no after to provide internally directed segments. Furthermore, it is very cheap if the attachment points, such as screws, for fastening the lid radially are arranged outside the pressure chambers.
- FIG. 1 shows a cylinder head 100 with hydraulic devices 102, 104 for continuously variable adjustment of not shown here Inlet and exhaust camshaft (s) of a multi-cylinder internal combustion engine in frontal view.
- s Inlet and exhaust camshaft
- the device 102, 104 allows an adjustment of the camshaft relative to the crankshaft and thus the timing of the cam this wave actuated valves, with advantages in particular with respect on emissions, fuel consumption, torque history and Performance development result.
- the device 102, 104 is in the drive train arranged the camshaft drive, wherein a drive of the camshaft starting from the crankshaft via an outer rotor 114, 116 and a to this relatively rotatable, not visible in the present view, Internal rotor takes place.
- Each adjusting device 102, 104 is in a suitably designed Room 106, 108 of the cylinder head and includes the cup-shaped outer rotor 114, 116, with which a drive wheel, such as Sprocket 110, 112, to the output of the crankshaft drive connected is.
- a drive wheel such as Sprocket 110, 112
- the outer rotor 114, 116 is the rotation with the camshaft connected, not visible in the present view
- inner rotor taken to the outer rotor 114, 116 relative between two Drehendlagen is rotatable and which front side a hub portion 118, 120 is assigned.
- the cup-shaped interior of the outer rotor 114, 116 is closed by means of a screwed lid 122, 124.
- a cylinder head cover to cover the entire arrangement is a cylinder head cover, not shown here provided, which rests tightly on the peripheral flange 126.
- This relatively rotatable inner rotor is in Figure 2 in perspective Illustration shown.
- a ring portion 208 and a Bottom portion 210 having outer rotor 202 is one with the Bottom portion 210 of the outer rotor 202 rotatably connected drive wheel, like sprocket 206, provided.
- drive wheel like sprocket 206
- the outer rotor 202 is relative to this rotatable, rotatably connected to a camshaft inner rotor 204th added.
- the inner rotor has a plurality, in the present case six, rotor blades 212, 214, 216, 218, 220, 222, which with their outer ends at the inner radius of Ring portion 208 of the outer rotor 202 at relative rotation between Outer rotor 202 and inner rotor 204 sliding, but tight, abut.
- cylindrical shell-shaped pendulum head guides in which the Pendulum heads of pendulum 224, 226, 228, 230, 232, 234 swiveling are arranged, whose pendulum feet in Pendelfußnuten 236, 238, 240, 242, 244, 246 of the outer rotor 202 pivotally mounted and radially displaceable are.
- the pendulum 224, 226, 228, 230, 232, 234 close with the Rotor blades 212, 214, 216, 218, 220, 222 pressurizable Main pressure chambers and lie in the Drehendlagen as shown on the Rotor blades 212, 214, 216, 218, 220, 222;
- Each pendulum 224, 226, 228, 230, 232, 234 are thus associated with two main pressure chambers.
- a relative rotation of inner 204 and outer rotor 202 is by a Pressure differential in the one pendulum 224, 226, 228, 230, 232, 234 associated main pressure chambers achieved, with adjustment angle and Adjustment can be controlled by appropriate pressure gradients.
- FIG. 3 A detailed view of an arranged between rotor blades 312, 314, pivotally mounted pendulum 326 and a pressurizable Main 376, 374 and secondary pressure chamber 380 shows Figure 3.
- the pivotable in the inner rotor 304 mounted cylindrical pendulum head 362 ensures a very long, precisely defined sealing gap with good sealing and allows at the same time a high angle of rotation between inner 304 and outer rotor 302 of up to 25-45 °, in particular of about 35 °.
- the pendulum 326 For pivoting and radial slidable mounting of the pendulum 326 in the Pendelfußnut 338 of Outer rotor 302, the pendulum 326 has a cylindrical, frontally flattened pendulum foot 360 on, so by applying the Pendulum foot 260 to the Pendelfußnut 338 in the direction of the main pressure chamber with lower pressure even in case of possible wear of the Construction of very high pressures with minimized leakage losses is guaranteed.
- the pendulum 326 between pendulum head 362 and Pendulum foot 360 one with pendulum head 362 and pendulum foot 360 by means of webs 366, 368 connected, cylindrical-drop-shaped pendulum body 364, wherein the transition from pendulum body 364 to the pendelfuß solutionen web 366th small, when applied to the rotor blades 314, 312 a throttle edge forming Radii and the transition from pendulum body 364 to pendulum head side Bridge has 368 large radii.
- the rotor blades 312, 314 have one with the contour of a pendulum 326th corresponding contact surface, wherein upon movement in the direction the Drehendlagen in the transition region 372 from the pendulum body 364 to pendulum-head-side web 368 from the main pressure chamber 374 a secondary pressure chamber 380 separated and in the transition region 370 from the shuttle 364 to pendulum footbridge 366 a throttled drain is formed.
- a throttled drain is formed with increasing abutment of the pendulum 326 with an associated rotor blade, such as the rotor blade 314 shown in the figure.
- Main pressure chamber 374 and the secondary pressure chamber 380 reach one minimum and that between pendulum body 326 and rotor blades 312 enclosed main pressure chamber 376 reaches a maximum size. Also upon reaching the minimum size, the main pressure space 374 includes small remaining volume, whereas that of Mautikraum 380 enclosed volume is at least approximately close to zero.
- the arrangement according to the invention ensures a damped application the pendulum 224, 226, 228, 230, 232, 234, 326 to the corresponding Wing sides in the rotary end positions, by applying the pendulum 224, 226, 228, 230, 232, 234, 326 to the rotor blades 212, 214, 216, 218, 220, 222, 312, 314 of the inner rotor 204, 304 not only the main pressure chambers Form "squeeze chambers" in which the oil must be displaced, respectively but also secondary pressure chambers, such as that shown in FIG Secondary pressure chamber 380, to be separated, the additional pressure pad form.
- a pressure reduction from the secondary pressure chamber 380 is strong throttled over in the transition region 370 from the pendulum body 364 to pendulum side web 366 formed Abiserspalt in the associated Main pressure chamber 374.
- the main pressure chambers have, as in FIG. 2 illustrated perspective view partially visible, respectively Drain holes 248, 250 on.
- Inner 204, 304 and outer rotor 202, 302 are in at least one Rotational end position, especially in a previous valve actuation assigned rotary end position, locked against each other, so that For example, a start of the internal combustion engine in this preferred position, the also serves as a reference position takes place.
- the locking device comprises a guided in a broader rotor blade 222 axially movable Locking bolt 252, which in the locking position in the Bottom portion 210 of the cup-shaped outer rotor 202 engages.
- the Preferred position is, especially if the pressure chambers are not are pressurized, by means of a preloaded spring, which at least indirectly on the outer rotor 202 on the one hand and on the inner rotor 204th on the other hand supports, ingestible.
- the adjusting device is in essentially made of steel, but the arrangement is also very good for the implementation of a, for example, aluminum and / or magnesium-based lightweight construction concept, in particular, since in the Drehendlagen a material-saving, damped system of pendulum the rotor blades is guaranteed. Furthermore, the arrangement offers special Advantages in terms of manufacturing, as the inner radius of the ring area 208 of the outer rotor 202, 302, on which the rotor blades 212, 214, 216, 218, 220, 222, 312, 314 sliding with their outer ends, but dense abut, is circular in shape and no inward Has segments. In particular, in a lightweight construction is effectively prevents component distortion.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Hydraulic Motors (AREA)
Abstract
Description
- Figur 1
- einen Zylinderkopf mit einer hydraulischen Einrichtungen zur stufenlos variablen Verstellung der Einlass- und Auslassnockenwelle(n) einer Brennkraftmaschine,
- Figur 2
- eine hydraulische Einrichtung zur stufenlos variablen Verstellung der Nockenwelle einer Brennkraftmaschine mit einem von einer Kurbelwelle angetriebenen Außenrotor und einem der Nockenwelle zugeordneten, zu diesem relativ verdrehbaren Innenrotor in perspektivischer Darstellung und
- Figur 3
- ein zwischen Rotorflügeln angeordnetes, schwenkbar gelagertes Pendel sowie einen druckbeaufschlagbaren Haupt- und Nebendruckraum.
Claims (13)
- Hydraulische Einrichtung zur stufenlos variablen Verstellung der Nockenwelle einer Brennkraftmaschine mit einem von einer Kurbelwelle angetriebenen Außenrotor und einem der Nockenwelle zugeordneten, zu diesem relativ verdrehbaren Innenrotor, wobei zwischen Innen- und Außenrotor im Innenrotor einerseits und im Außenrotor andererseits schwenkbar gelagerte Pendel angeordnet sind, welche mit zwischen den Pendeln liegenden Rotorflügeln druckbeaufschlagbare Hauptdruckräume einschließen und in den Drehendlagen an den Rotorflügeln anliegen, dadurch gekennzeichnet, dass zur gedämpften Anlage der Pendel (224, 226, 228, 230, 232, 234, 326) an die Rotorflügel (212, 214, 216, 218, 220, 222, 212, 314) gesonderte Dämpfungseinrichtungen vorgesehen sind.
- Einrichtung nach Anspruch 1, dadurch gekennzeichnet, dass zur Dämpfung bei der Anlage in den Drehendlagen zusätzlich zu einem in einem Hauptdruckraum (374) gebildeten Druckpolster ein weiteres Druckpolster aufbaubar ist.
- Einrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass zum Aufbau des weiteren Druckpolsters die Anlagefläche zwischen Pendel (224, 226, 228, 230, 232, 234, 326) und Rotorflügel (212, 214, 216, 218, 220, 222, 212, 314) derart ausgestaltet ist, dass bei der Anlage vom Hauptdruckraum (374) ein einen gedrosselten Abfluss aufweisender Nebendruckraum (380) abtrennbar ist.
- Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in einem Nebendruckraum (380) gegenüber einem diesem zugeordneten Hauptdruckraum (374) ein erhöhter Druck aufbaubar ist und ein Druckausgleich von einem Nebendruckraum (380) in einen Hauptdruckraum (374) erfolgt.
- Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein Pendel (224, 226, 228, 230, 232, 234, 326) zur schwenkbaren Lagerung im Innenrotor (204, 304) einen zylindrischen Pendelkopf (362) aufweist.
- Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein Pendel (224, 226, 228, 230, 232, 234, 326) zur schwenk- und radial verschiebbaren Lagerung im Außenrotor (202, 302) einen zylinderartigen, stirnseitig abgeflachten Pendelfuß (360) aufweist.
- Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein Pendel (224, 226, 228, 230, 232, 234, 326) zwischen Pendelkopf (362) und Pendelfuß (360) einen mit Pendelkopf (362) und Pendelfuß (360) mittels Stegen (366, 368) verbundenen, zylindrisch-tropfenförmigen Pendelkörper (364) aufweist.
- Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Übergang von Pendelkörper (364) zum pendelfußseitigen Steg (366) kleine, bei Anlage eine Drosselkante bildende Radien und der Übergang von Pendelkörper (364) zum pendelkopfseitigen Steg (368) große Radien aufweist.
- Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein Rotorflügel (212, 214, 216, 218, 220, 222, 212, 314) eine mit der Kontur eines Pendels (224, 226, 228, 230, 232, 234, 326) korrespondierende Anlagefläche aufweist, wobei in den Drehendlagen im Bereich des pendelfußseitigen Stegs (366) vom Hauptdruckraum (374) ein Nebendruckraum (380) abgetrennt und im Übergangsbereich (370) vom Pendelkörper (364) zum pendelfußseitigen Steg (366) ein gedrosselter Abfluss gebildet wird.
- Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sich mit zunehmender Anlage eines Pendels (224, 226, 228, 230, 232, 234, 326) an einen Rotorflügel (212, 214, 216, 218, 220, 222, 212, 314) der zugeordnete Nebendruckraum (380) verkleinert, wobei ein Druckabbau durch den Abfluss (370) in den zugeordneten Hauptdruckraum (374) erfolgt.
- Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Hauptdruckraum (374) mit wenigstens einem Abflusskanal (248, 250) verbunden ist.
- Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der innere Radius des Ringbereichs (208) des Außenrotors (202, 302) kreisrund ausgestaltet ist und keine nach innen gerichteten Segmente aufweist.
- Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Befestigungsstellen zur Befestigung des Deckels (122, 124) radial außerhalb der Druckkammern (374, 376) angeordnet sind.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004019770 | 2004-04-23 | ||
| DE200410019770 DE102004019770A1 (de) | 2004-04-23 | 2004-04-23 | Hydraulische Einrichtung zur stufenlos variablen Nockenwellenverstellung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1589196A2 true EP1589196A2 (de) | 2005-10-26 |
| EP1589196A3 EP1589196A3 (de) | 2008-08-06 |
Family
ID=34934689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05007186A Ceased EP1589196A3 (de) | 2004-04-23 | 2005-04-01 | Hydraulische Einrichtung zur stufenlos variablen Nockenwellenverstellung |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1589196A3 (de) |
| DE (1) | DE102004019770A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1762706A3 (de) * | 2005-09-13 | 2007-05-30 | Delphi Technologies, Inc. | Flügelzellennockenwellenversteller mit erhöhtem Schwenkwinkel, Verriegelung in einer Zwischenposition und eigener Ölzufuhr |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4542012A3 (de) * | 2023-10-19 | 2025-06-04 | Cummins, Inc. | Nockenwellenversteller für verbrennungsmotoren |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19961567A1 (de) | 1999-12-21 | 2001-07-05 | Guenther Beez | Hydraulische Vorrichtung zur stufenlos variablen Nockenwellenverstellung |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19819995A1 (de) * | 1998-05-05 | 1999-11-11 | Porsche Ag | Vorrichtung zur hydraulischen Drehwinkelverstellung einer Welle zu einem Antriebsrad |
| JP2000130117A (ja) * | 1998-10-27 | 2000-05-09 | Aisin Seiki Co Ltd | 弁開閉時期制御装置 |
| DE10055770A1 (de) * | 2000-11-10 | 2002-05-23 | Bayerische Motoren Werke Ag | Verfahren für den Betrieb eines Ventils für eine hydraulische Verstelleinheit |
| DE10104038A1 (de) * | 2001-01-31 | 2002-08-01 | Bayerische Motoren Werke Ag | Vorrichtung zum Verdrehen einer Exzenterwelle eines Ventiltriebs |
| US6445608B1 (en) * | 2001-09-10 | 2002-09-03 | Ramtron International Corporation | Ferroelectric random access memory configurable output driver circuit |
| DE10150856B4 (de) * | 2001-10-15 | 2005-08-11 | Ina-Schaeffler Kg | Vorrichtung zum Verändern der Steuerzeiten von Gaswechselventilen einer Brennkraftmaschine, insbesondere Rotationskolben-Verstelleinrichtung zur Drehwinkelverstellung einer Nockenwelle gegenüber einer Kurbelwelle |
| DE10218201C1 (de) * | 2002-04-24 | 2003-10-30 | Porsche Ag | Nockenwellenversteller für eine veränderbare Ventilsteuerung |
-
2004
- 2004-04-23 DE DE200410019770 patent/DE102004019770A1/de not_active Withdrawn
-
2005
- 2005-04-01 EP EP05007186A patent/EP1589196A3/de not_active Ceased
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19961567A1 (de) | 1999-12-21 | 2001-07-05 | Guenther Beez | Hydraulische Vorrichtung zur stufenlos variablen Nockenwellenverstellung |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1762706A3 (de) * | 2005-09-13 | 2007-05-30 | Delphi Technologies, Inc. | Flügelzellennockenwellenversteller mit erhöhtem Schwenkwinkel, Verriegelung in einer Zwischenposition und eigener Ölzufuhr |
| US7421989B2 (en) | 2005-09-13 | 2008-09-09 | Delphi Technologies, Inc. | Vane-type cam phaser having increased rotational authority, intermediate position locking, and dedicated oil supply |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1589196A3 (de) | 2008-08-06 |
| DE102004019770A1 (de) | 2005-11-10 |
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