DE60018856T2 - Valve actuator and an equipped with this device internal combustion engine - Google Patents
Valve actuator and an equipped with this device internal combustion engine Download PDFInfo
- Publication number
- DE60018856T2 DE60018856T2 DE60018856T DE60018856T DE60018856T2 DE 60018856 T2 DE60018856 T2 DE 60018856T2 DE 60018856 T DE60018856 T DE 60018856T DE 60018856 T DE60018856 T DE 60018856T DE 60018856 T2 DE60018856 T2 DE 60018856T2
- Authority
- DE
- Germany
- Prior art keywords
- valve
- axis
- rotation
- cam
- movable
- 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
Links
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
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0063—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
-
- 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
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0021—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of rocker arm ratio
-
- 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
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0063—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
- F01L2013/0068—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot with an oscillating cam acting on the valve of the "BMW-Valvetronic" type
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Fluid-Driven Valves (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft eine Vorrichtung zur Steuerung eines Ventils und einen mit dieser Vorrichtung ausgerüsteten Verbrennungsmotor.The The present invention relates to a device for controlling a Valve and equipped with this device internal combustion engine.
Eines der Hauptkriterien für die Auslegung und Einstellung eines Verbrennungsmotors besteht meistens darin, die Leistungen des Motors in einem hohen Drehzahlbereich zu erhöhen, ohne die Leistungen und insbesondere das verfügbare Drehmoment im niedrigen und im mittleren Drehzahlbereich zu beeinträchtigen.One the main criteria for the design and adjustment of an internal combustion engine is mostly in it, the performances of the engine in a high speed range to increase, without the performances and in particular the available torque in the low and in the medium speed range.
Um dies zu erreichen, ist es bekannt, die Verteilung des Motors zu ändern, indem man den Hub seiner Ventile und/oder die Winkeleinstellung der diese Ventile betätigenden Nocken so ändert, dass gewisse Leistungen in einem bestimmten Drehzahlbereich begünstigt werden.Around To achieve this, it is known to change the distribution of the engine by the stroke of its valves and / or the angular adjustment of these Actuating valves Cam so changes that certain benefits in a certain speed range are favored.
Im Bereich der bestehenden variablen Ventilsteuerungssysteme ist es bekannt, dreidimensionale Nocken zu benutzen, d.h. Nocken, deren Profil längs ihrer Drehachse veränderlich ist. Dieses Konzept gestattet es, mit Hilfe einer Bewegung der Nockenwelle parallel zu ihrer Drehachse verschiedene Konfigurationen der Ventilsteuerung zu erreichen. Dieses Konzept ist besonders komplex und führt zu einer Erhöhung der Längsabmessung des Motors.in the It is the area of existing variable valve timing systems known to use three-dimensional cams, i. Cam, whose Profile along her Rotary axis variable is. This concept allows it, with the help of a movement of the camshaft parallel to its axis of rotation different valve timing configurations to reach. This concept is particularly complex and leads to a increase the longitudinal dimension of the motor.
FR-A-2 453 979 beschreibt eine Vorrichtung zur Steuerung eines Ventils eines Verbrennungsmotors, die einen Kipphebel umfasst, der auf einem Träger um eine feste Schwenkachse schwenkbar montiert ist und mit einem ersten Arm, der das freie Ende des Schafts des Ventils beaufschlägt, und mit einem zweiten Arm versehen ist, der von einem drehbaren Steuernocken beaufschlagt wird, sowie Mittel zur Einstellung des Hubs des Ventils.FR-A-2 453 979 describes a device for controlling a valve an internal combustion engine, which comprises a rocker arm, which on a carrier is pivotally mounted about a fixed pivot axis and with a first arm, which acts on the free end of the stem of the valve, and is provided with a second arm of a rotatable control cam is acted upon, and means for adjusting the stroke of the valve.
Die in dieser Schrift beschriebenen Mittel zur Einstellung des Ventilhubs, die einen einer Drehachse des Kipphebels zugeordneten Exzenter umfassen, sind relativ kompliziert.The means for adjusting the valve lift described in this document, comprising an eccentric associated with an axis of rotation of the rocker arm, are relatively complicated.
Ferner kennt man aus der Schrift GB-A-12069 eine Vorrichtung zur Steuerung eines Ventils eines Verbrennungsmotors gemäß dem Oberbegriff des Anspruchs 1.Further known from the document GB-A-12069 a device for control a valve of an internal combustion engine according to the preamble of the claim 1.
Ziel der Erfindung ist es, eine einfache und kostengünstige Vorrichtung zur Steuerung eines Ventils mit geringen Längsabmessungen zu schaffen, wobei soweit wie möglich die Verwendung von verschleißanfälligen Elementen, insbesondere von ständig oder häufig in Drehung versetzten Elementen, vermieden wird.aim The invention is a simple and inexpensive device for control a valve with small longitudinal dimensions to create as much as possible the use of wear-prone elements, especially from constantly or often in rotation offset elements, is avoided.
Zu diesem Zweck ist Gegenstand der Erfindung eine Vorrichtung zur Steuerung eines Ventils der oben beschriebenen Art, dadurch gekennzeichnet, dass die Kontaktfläche des Stellnockens mit der zweiten Rolle durch eine geradlinige Rampe begrenzt ist und der Stellnocken in einer mit dem Träger fest verbundenen, gekrümmten Führung so verschiebbar ist, dass er einen gekrümmten Weg beschreibt, der auf einer zur festen Schwenkachse im Wesentlichen parallelen Führungsachse zentriert ist.To For this purpose, the subject of the invention is a device for controlling a valve of the type described above, characterized in that that the contact surface of the parking cam with the second roller by a rectilinear ramp is limited and the adjusting cam in one with the carrier firmly connected, curved guide is so slidable that it describes a curved path that opens up a guide axis substantially parallel to the fixed pivot axis is centered.
Gemäß weiteren Merkmalen der Erfindung:
- – fällt die Führungsachse mit der zweiten beweglichen Drehachse zusammen, wenn das Ventil in einer Bezugsstellung ist,
- – umfasst sie Mittel zur Verstellung der Winkeleinstellung des Steuernockens,
- – umfassen die Mittel zur Verstellung der Winkeleinstellung einen die erste bewegliche Drehachse bildenden Drehzapfen, der in einem gekrümmten Langloch beweglich ist, das sich um eine feste Drehachse des Steuernockens krümmt,
- – ist das gekrümmte Langloch auf einer Winkeleinstellungsachse zentriert, die mit der festen Drehachse des Steuernockens zusammenfällt, wenn das Ventil in einer Bezugsstellung ist,
- – umfassen die Mittel zur Verstellung der Winkeleinstellung Mittel, die mit einer den Steuernocken tragenden Nockenwelle gekoppelt sind.
- The guide axis coincides with the second movable axis of rotation when the valve is in a reference position,
- It comprises means for adjusting the angular adjustment of the control cam,
- The angular adjustment means comprise a pivot forming the first movable axis of rotation and movable in a curved slot which curves around a fixed axis of rotation of the control cam,
- The curved slot is centered on an angular adjustment axis which coincides with the fixed axis of rotation of the control cam when the valve is in a reference position,
- - The means for adjusting the angular adjustment comprise means which are coupled to a control cam bearing camshaft.
Gegenstand der Erfindung ist ferner ein Verbrennungsmotor, dadurch gekennzeichnet, dass er eine Vorrichtung zur Ventilsteuerung der oben beschriebenen Art aufweist, wobei das Ventil vorzugsweise ein Einlassventil ist.object The invention further relates to an internal combustion engine, characterized that it is a device for valve control of the above-described Type, wherein the valve is preferably an inlet valve.
Die
In
Das
Ventil
Bei
dem beschriebenen Beispiel ist die Steuervorrichtung
Die
Steuervorrichtung
Der
Nocken
Die
Steuervorrichtung
Das
Stellorgan
Es sei bemerkt, dass die Achsen F1, F2, M1, R1 und R2 im Wesentlichen zueinander parallel sind. Ferner sei bemerkt, dass die drei beweglichen Achsen M1, R1 und R2 in einer zu ihnen senkrechten Ebene die drei Ecken eines Dreiecks bilden. Alle Achsen F1, F2, M1, R1 und R2 sind paarweise verschieden.It It should be noted that the axes F1, F2, M1, R1 and R2 are substantially are parallel to each other. It should also be noted that the three movable Axes M1, R1 and R2 in a plane perpendicular to them the three Forming corners of a triangle. All axes are F1, F2, M1, R1 and R2 in pairs different.
Der
Stellnocken
Die
Kontaktfläche
des Stellnockens
Der
Stellnocken
Die
Führungsachse
G fällt
mit der zweiten beweglichen Drehachse R2 zusammen, wenn das Ventil
Wenn
man nun den Stellnocken
Der
Stellnocken
Während des
Betriebs der in
Zur Änderung
des Hubs des Ventils
Es
sei bemerkt, dass die Einstellung des Hubs des Ventils kontinuierlich
durchgeführt
werden kann, da der Stellnocken
Der Motor besitzt auf klassische Weise eine Kurbelwelle, der die Ventilsteuervorrichtung zugeordnet ist. Die Kurve des Hubs des Ventils in Abhängigkeit vom Drehwinkel der Kurbelwelle hat klassischerweise die allgemeine Form einer Glocke (vgl. beispielsweise FR-A-2.453.979).Of the Engine has in a classic way a crankshaft, which is the valve control device assigned. The curve of the stroke of the valve in dependence From the angle of rotation of the crankshaft has classically the general Shape of a bell (see, for example, FR-A-2,453,979).
Die
zweite Rolle
In
den
Die
Steuervorrichtung
Bei
der zweiten Ausführungsform
der Erfindung, die in
Das
gekrümmte
Langloch
Da
die Achsen C und F2 zusammenfallen, wenn das Ventil geschlossen
ist, wie oben bezüglich der
Achsen G und R2 erläutert
wurde, bleibt die Rolle
Der
Drehzapfen
Bei
der dritten Ausführungsform
der Erfindung, die in
Im
Fall eines Einlassventils gestatten es die in den
Von
den Vorteilen der Erfindung seien die folgenden genannt:
Die
erfindungsgemäße Vorrichtung
zur Steuerung eines Ventils gestattet die kontinuierliche Verstellung des
Hubs des Ventils, und zwar mit Hilfe eines Stellnockens
The inventive device for controlling a valve allows the continuous adjustment of the stroke of the valve, with the aid of a parking cam
Diese Verschleißgefahr ist um so geringer, als die Mittel zur Verstellung des Hubs des Ventils kein ständig rotierendes Element erfordern.These risk of wear is less than the means for adjusting the stroke of the Valve no constantly require rotating element.
Ferner werden die Öffnung und die Schließung des Ventils progressiv und geräuscharm vollzogen, und zwar mit Hilfe von Mitteln mit geringen Abmessungen insbesondere in der Längsrichtung des Motors, d.h. in der zur festen Schwenkachse F1 des Kipphebels parallelen Richtung.Further be the opening and the closure the valve is progressive and quiet carried out by means of small dimensions especially in the longitudinal direction of the engine, i. in the fixed pivot axis F1 of the rocker arm parallel direction.
Ferner
sind die verschiedenen Hubkurven des Ventils in Abhängigkeit
von dem Drehwinkel der Kurbelwelle, die für verschiedene Einstellungen
der Stellung des Stellnockens
Schließlich sei bemerkt, dass die erfindungsgemäße Vorrichtung in einem Motor verwendet werden kann, der eine oder zwei Nockenwellen besitzt.Finally, be noticed that the device according to the invention Can be used in an engine that has one or two camshafts has.
Claims (7)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9909810 | 1999-07-28 | ||
FR9909810A FR2796982B1 (en) | 1999-07-28 | 1999-07-28 | DEVICE FOR CONTROLLING A VALVE AND INTERNAL COMBUSTION ENGINE PROVIDED WITH SUCH A DEVICE |
Publications (2)
Publication Number | Publication Date |
---|---|
DE60018856D1 DE60018856D1 (en) | 2005-04-28 |
DE60018856T2 true DE60018856T2 (en) | 2006-03-30 |
Family
ID=9548630
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE60018856T Expired - Lifetime DE60018856T2 (en) | 1999-07-28 | 2000-07-21 | Valve actuator and an equipped with this device internal combustion engine |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1072762B1 (en) |
AT (1) | ATE291680T1 (en) |
DE (1) | DE60018856T2 (en) |
FR (1) | FR2796982B1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10155007A1 (en) * | 2001-11-06 | 2003-05-15 | Herbert Naumann | Valve stroke |
GB0200936D0 (en) * | 2002-01-16 | 2002-03-06 | Lotus Car | Valve operating mechanisms |
DE10206465A1 (en) | 2002-02-16 | 2003-08-28 | Mahle Ventiltrieb Gmbh | Control unit for a gas exchange valve in a combustion engine with a multi-component drive, has curved part with separate sectional effects |
DE10214802A1 (en) * | 2002-04-04 | 2003-10-16 | Thyssen Krupp Automotive Ag | Guide systems for variable valve controls |
GB2395229A (en) | 2002-11-16 | 2004-05-19 | Mechadyne Plc | Engine with variable valve lift and timing mechanism |
JP4381188B2 (en) * | 2004-03-19 | 2009-12-09 | 三菱ふそうトラック・バス株式会社 | Variable valve operating device for internal combustion engine |
DE112004001267B4 (en) | 2004-03-23 | 2010-06-24 | Mitsubishi Fuso Truck And Bus Corp. | Variable valve train of an internal combustion engine |
CN100406689C (en) * | 2004-04-27 | 2008-07-30 | 三菱扶桑卡客车公司 | Variable valve gear of internal combustion engine |
DE102006003002B3 (en) * | 2006-01-23 | 2007-03-08 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Valve operating mechanism for internal combustion engine, has springs supported at roll axis, which is pressed against operating force during passage of plateau areas opposite to radial cam directed in rotating direction of cams |
JP7369613B2 (en) * | 2019-12-25 | 2023-10-26 | 川崎重工業株式会社 | variable valve mechanism |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2395783A2 (en) | 1977-06-29 | 1979-01-26 | Lamort Ingenieurs Const E Et M | Disintegrator drum for light household rubbish - cleans and extracts cellulosic materials for recycling |
SE7907399L (en) | 1979-09-05 | 1981-03-06 | Mo Och Domsjoe Ab | DEVICE FOR COMBINED CRUSHING AND TREATMENT SPECIAL WASTE MATERIALS |
FR2519375B1 (en) * | 1981-12-31 | 1986-07-11 | Baguena Michel | VARIABLE VALVE FOR FOUR-STROKE ENGINE |
DE3438556A1 (en) * | 1984-10-20 | 1986-04-24 | Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh, 7990 Friedrichshafen | VALVE CONTROL OF A RECHARGEED 4-STROKE COMBUSTION ENGINE |
DE3833540A1 (en) * | 1988-10-01 | 1990-04-12 | Peter Prof Dr Ing Kuhn | DEVICE FOR ACTUATING THE VALVES OF INTERNAL COMBUSTION ENGINES WITH VARIABLE VALVE LIFTING CURVE |
DE4114780A1 (en) | 1991-05-06 | 1992-11-12 | Courtnay Commodity Ltd | Method of disposal of household refuse - by separating soft refuse from hard refuse and making compost from soft refuse |
FR2746410B1 (en) | 1996-03-22 | 1998-04-24 | Sogea | AEROBIC FERMENTATION SYSTEM FOR ORGANIC WASTE |
-
1999
- 1999-07-28 FR FR9909810A patent/FR2796982B1/en not_active Expired - Fee Related
-
2000
- 2000-07-21 EP EP00402105A patent/EP1072762B1/en not_active Expired - Lifetime
- 2000-07-21 AT AT00402105T patent/ATE291680T1/en not_active IP Right Cessation
- 2000-07-21 DE DE60018856T patent/DE60018856T2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
FR2796982B1 (en) | 2001-10-26 |
EP1072762B1 (en) | 2005-03-23 |
EP1072762A3 (en) | 2001-10-24 |
DE60018856D1 (en) | 2005-04-28 |
FR2796982A1 (en) | 2001-02-02 |
EP1072762A2 (en) | 2001-01-31 |
ATE291680T1 (en) | 2005-04-15 |
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Legal Events
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---|---|---|---|
8364 | No opposition during term of opposition | ||
8320 | Willingness to grant licences declared (paragraph 23) |