DE102007002802A1 - Valve train changing method for internal combustion engine, involves shifting cam carrier between axial position, which is assigned to two stroke operation, and another axial position, which is assigned to four-stroke operation - Google Patents
Valve train changing method for internal combustion engine, involves shifting cam carrier between axial position, which is assigned to two stroke operation, and another axial position, which is assigned to four-stroke operation Download PDFInfo
- Publication number
- DE102007002802A1 DE102007002802A1 DE102007002802A DE102007002802A DE102007002802A1 DE 102007002802 A1 DE102007002802 A1 DE 102007002802A1 DE 102007002802 A DE102007002802 A DE 102007002802A DE 102007002802 A DE102007002802 A DE 102007002802A DE 102007002802 A1 DE102007002802 A1 DE 102007002802A1
- Authority
- DE
- Germany
- Prior art keywords
- cam
- cam profile
- stroke operation
- internal combustion
- combustion engine
- 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
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
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L1/185—Overhead end-pivot rocking arms
-
- 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
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L1/053—Camshafts overhead type
-
- 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
- F01L1/36—Valve-gear or valve arrangements, e.g. lift-valve gear peculiar to machines or engines of specific type other than four-stroke cycle
- F01L1/38—Valve-gear or valve arrangements, e.g. lift-valve gear peculiar to machines or engines of specific type other than four-stroke cycle for engines with other than four-stroke cycle, e.g. with two-stroke cycle
-
- 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
- F01L13/0036—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 the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
- F01L13/0042—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 the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction with cams being profiled in axial and radial direction
-
- 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
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
- F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head and rocker arm
-
- 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
- F01L13/0036—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 the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
- F01L2013/0052—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 the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction with cams provided on an axially slidable sleeve
-
- 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
- F01L2305/00—Valve arrangements comprising rollers
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Umstellen eines Ventiltriebs einer Brennkraftmaschine zwischen einem Zweitakt- und einem Viertaktbetrieb der Brennkraftmaschine mit mindestens einer drehbar gelagerten Nockenwelle und mit mindestens einer, mehrere unterschiedliche Nockenprofile aufweisenden Nockenprofilgruppe.The The invention relates to a method for changing over a valve train an internal combustion engine between a two-stroke and a four-stroke operation of Internal combustion engine with at least one rotatably mounted camshaft and at least one, several different cam profiles having cam profile group.
Weiterhin betrifft die Erfindung einen Ventiltrieb einer Brennkraftmaschine mit mindestens einer drehbar gelagerten Nockenwelle, mindestens einer, mehrere unterschiedliche Nockenprofile aufweisenden Nockenprofilgruppe und einer die Nockenprofile auswählenden Umstellvorrichtung für ein Umstellen zwischen einem Zweitakt- und einem Viertaktbetrieb der Brennkraftmaschine.Farther The invention relates to a valve train of an internal combustion engine with at least one rotatably mounted camshaft, at least one, several different cam profiles having cam profile group and a cam profile selecting switching device for switching between a two-stroke and a four-stroke operation of Internal combustion engine.
Verfahren
zum Umstellen eines Ventiltriebs zwischen einem Zweitakt- und einem
Viertaktbetrieb der Brennkraftmaschine sind bekannt. Im Zweitaktbetrieb
betriebene Brennkraftmaschinen haben aufgrund ihrer höheren
Zündfolge prinzipbedingt gegenüber dem Viertaktbetrieb
den Vorteile einer höheren spezifische Leistung. Auf der
anderen Seite hat der Viertaktbetrieb aufgrund der Vermeidung von
Spülverlusten beim Ladungswechsel deutliche Vorteile hinsichtlich
des Kraftstoffverbrauchs und der Verminderung von Schadstoffemissionen.
Eine zwischen dem Zweitakt- und dem Viertaktbetrieb umschaltbare Brennkraftmaschine
kombiniert die Vorteile des Viertaktbetriebs im Teillastbereich
mit dem Vorteil des Zweitaktbetriebs im Volllastbereich der Brennkraftmaschine.
Die
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren anzugeben, das ein schnelles Umstellen zwischen einem Zweitakt- und einem Viertaktbetrieb ermöglicht und auch bei hoher Drehzahl und Zweitaktbetrieb eine präzise Nockensteuerung gewährleistet. Das erfindungsgemäße Verfahren sieht dazu vor, dass mindestens ein drehfest und axial verschiebbar auf der Nockenwelle geführter Nockenträger, der die mindestens eine Nockenprofilgruppe aufweist, zur Nockenprofilauswahl zwischen mindestens einer dem Zweitaktbetrieb zugeordneten axialen Stellung und mindestens einer anderen, dem Viertaktbetrieb zugeordneten axialen Stellung verschoben wird. Auf dem mindestens einen Nockenträger ist jeweils mindestens eine Nockenprofilgruppe vorgesehen, die verschiedene Nockenprofile aufweist. Durch axiales Verschieben des Nockenträgers auf der Nockenwelle zwischen den axialen Stellungen wird jeweils eines der Nockenprofile jeder Nockenprofilgruppe zur Steuerung eines zugeordneten Gaswechselventils der Brennkraftmaschine ausgewählt. Das axiale Verschieben des Nockenträgers auf der Nockenwelle zur Nockenprofilauswahl erfolgt mittels einer Umstellvorrichtung, die mindestens eine Einrichtung zum axialen Verschieben des mindestens einen Nockenträgers aufweist.Of the Invention has for its object to provide a method which a quick changeover between a two-stroke and a four-stroke operation allows and even at high speed and two-stroke operation ensures a precise cam control. The inventive method provides that at least one rotationally fixed and axially displaceable on the camshaft guided cam carrier having the at least one Cam profile group, for cam profile selection between at least one the two-stroke mode associated axial position and at least another, the four-stroke mode associated axial position is moved. On the at least one cam carrier In each case at least one cam profile group is provided, the different Has cam profiles. By axial displacement of the cam carrier on the camshaft between the axial positions is respectively one of the cam profiles of each cam profile group for controlling a assigned gas exchange valve of the internal combustion engine selected. The axial displacement of the cam carrier on the camshaft for cam profile selection by means of a switching device, the at least one device for axial displacement of the at least having a cam carrier.
Nach einer Weiterbildung der Erfindung ist vorgesehen, dass in der einen Stellung des Nockenträgers ein dem Zweitaktbetrieb zugeordnetes Nockenprofil und in der anderen Stellung des Nockenträgers ein dem Viertaktbetrieb zugeordnetes Nockenprofil der Nockenprofilgruppe mit einem zugeordneten Schlepphebel der Brennkraftmaschine in Anlagekontakt gebracht wird. Jeder der Schlepphebel steuert ein Gaswechselventil der Brennkraftmaschine an. Weiterhin ist vorgesehen, dass die Einrichtung zum axialen Verschieben des mindestens einen Nockenträgers mindestens ein Stellorgan mit mindestens einem Eingriffselement aufweist, wobei sich das Eingriffselement mit einer Kurvenkulisse in Eingriff bringen lässt.To a development of the invention is provided that in the one Position of the cam carrier associated with the two-stroke operation Cam profile and in the other position of the cam carrier a four-stroke mode associated cam profile of the cam profile group with an associated drag lever of the internal combustion engine in abutting contact is brought. Each of the drag levers controls a gas exchange valve of the internal combustion engine. Furthermore, it is provided that the device for axial displacement of the at least one cam carrier at least one actuator with at least one engagement element having, wherein the engagement element with a curved backdrop can be engaged.
Der erfindungsgemäße Ventiltrieb besitzt mindestens einen drehfest und axial verschiebbar auf der Nockenwelle geführten Nockenträger, der die mindestens eine Nockenprofilgruppe aufweist, wobei die Umstellvorrichtung zur Nockenprofilauswahl mindestens eine Einrichtung zum axialen Verschieben des mindestens einen Nockenträgers zwischen mindestens einer dem Zweitaktbetrieb zugeordneten axialen Stellung und mindestens einer anderen, dem Viertaktbetrieb zugeordneten axialen Stellung aufweist. Ein solches Verschieben kann schnell erfolgen. Zur drehfesten und axial verschiebbaren Führung des Nockenträgers auf der Nockenwelle sind diese vorzugsweise durch eine axial verlaufende Verzahnung miteinander verbunden, wobei die Nockenwelle eine Außenverzahnung und der Nockenträger eine Innenverzahnung aufweisen.Of the Valve gear according to the invention has at least a rotationally fixed and axially displaceable guided on the camshaft Cam carrier, the at least one cam profile group has, wherein the switching device for cam profile selection at least a device for axially displacing the at least one cam carrier between at least one of the two-stroke operation associated axial Position and at least one other, the four-stroke operation assigned having axial position. Such a move can be fast respectively. For non-rotatable and axially displaceable guide the cam carrier on the camshaft, these are preferably connected by an axially extending toothing, wherein the camshaft has an external toothing and the cam carrier a Have internal teeth.
Mit Vorteil ist vorgesehen, dass in der einen Stellung des Nockenträgers ein dem Zweitaktbetrieb zugeordnetes Nockenprofil und in der anderen Stellung des Nockenträgers ein dem Viertaktbetrieb zugeordnetes Nockenprofil der mindestens einen Nockenprofilgruppe mit einem zugeordneten Schlepphebel der Brennkraftmaschine in Anlagekontakt ist. Durch die axiale Verschiebung des Nockenträgers auf der Nockenwelle kann eines der Nockenprofile jeder Nockenprofilgruppe ihre zugeordneten Schlepphebel des Ventiltriebs eines der Gaswechselventile der Brennkraftmaschine in Anlagekontakt gebracht werden. Ein solches Umstellen gewährleistet aufgrund der separaten Nockenprofile für den Zweitakt- und den Viertaktbetrieb eine präzise Ventilsteuerung der Gaswechselventile. Insbesondere ist vorgesehen, dass das dem Zweitaktbetrieb zugeordnete Nockenprofil der Nockenprofilgruppe ein Nockenprofil mit zwei Nocken und dass das dem Viertaktbetrieb zugeordnete Nockenprofil der Nockenprofilgruppe ein Nockenprofil mit nur einer Nocke ist. Durch diese Ausbildung der Nockenprofile ergibt sich im Zweitaktbetrieb gegenüber dem Viertaktbetrieb eine Verdoppelung der Arbeitstakte.With Advantage is provided that in the one position of the cam carrier a cam profile associated with two-stroke operation and in the other Position of the cam carrier associated with the four-stroke mode Cam profile of the at least one cam profile group with an associated Cam follower of the internal combustion engine is in contact with the system. By the axial displacement of the cam carrier on the camshaft For example, one of the cam profiles of each cam profile group can have its associated one Drag lever of the valve train of one of the gas exchange valves of the internal combustion engine be brought into abutting contact. Such a change ensures due to the separate cam profiles for the two-stroke and the four-stroke operation a precise valve control of the gas exchange valves. In particular, it is provided that the two-stroke operation associated Cam profile of the cam profile group a cam profile with two cams and that the four-stroke mode associated cam profile of the cam profile group a Cam profile with only one cam is. Through this education the Cam profiles result in two-stroke operation opposite the four-stroke operation doubling the power strokes.
Weiterhin ist mit Vorteil vorgesehen, dass die Einrichtung zum axialen Verschieben des mindestens einen Nockenträgers mindestens ein Stellorgan mit mindestens einem Eingriffselement aufweist, wobei sich das Eingriffselement mit einer Kurvenkulisse in Eingriff bringen lässt. Dabei ist mit Vorteil vorgesehen, dass das Stellorgan zusammen mit dem Eingriffselement in einem Gehäuseteil der Brennkraftmaschine angeordnet ist und die Kurvenkulisse auf dem Nockenträger ausgebildet/angeordnet ist. Das axiale Verschieben des Nockenträgers auf der Nockenwelle erfolgt bevorzugt mit Hilfe von zwei Stellorganen in Form von Aktuatoren, die axial versetzt in dem Gehäuse (zum Beispiel dem Zylinderkopfgehäuse) der Brennkraftmaschine angeordnet sind und jeweils ein Eingriffselement in Form eines Mitnehmerstifts aufweisen. Durch Betätigung von jeweils einem der Stellorgane lässt sich dessen Mitnehmerstift mit einer Kurvenkulisse auf dem Nockenträger in Eingriff bringen. Die Kurvenkulisse weist bei dem einen der beiden Stellorgane eine linksdrehende schraubenförmige Nut und bei dem anderen der beiden Stellorgane eine rechtsdrehende schraubenförmige Nut auf, sodass der Nockenträger zur Nockenprofilauswahl zwischen den Verschiebestellungen nach rechts beziehungsweise links verschoben wird, wenn das eine oder andere Stellorgan betätigt wird.Farther is provided with advantage that the means for axial displacement the at least one cam carrier at least one actuator with has at least one engagement element, wherein the engagement element can be engaged with a curve backdrop. there is provided with advantage that the actuator together with the Engagement element in a housing part of the internal combustion engine is arranged and the curve backdrop on the cam carrier is designed / arranged. The axial displacement of the cam carrier on the camshaft is preferably done with the help of two actuators in the form of actuators axially offset in the housing (For example, the cylinder head housing) of the internal combustion engine are arranged and in each case an engagement element in the form of a driving pin exhibit. By pressing one of the actuators can its driving pin with a curve backdrop engage on the cam carrier. The curve backdrop has in the one of the two actuators a left-handed helical Groove and the other of the two actuators a clockwise helical groove so that the cam carrier for cam profile selection between the shift positions to the right or left is shifted, if one or the other Actuator is actuated.
Alternativ ist mit Vorteil vorgesehen, dass das Stellorgan zusammen mit dem Eingriffselement auf dem Nockenträger angeordnet ist und die Kurvenkulisse in einem in einem Gehäuseteil der Brennkraftmaschine angeordneten Kulissenelement ausgebildet/angeordnet ist. Das Kulissenelement lässt sich mit Hilfe des zugehörigen Stellorgans quer zur Nockenwelle bewegen, um das Eingriffselement mit der Kurvenkulisse in Eingriff zu bringen und dadurch den Nockenträger zu verschieben. Dabei ist das Eingriffselement vorzugsweise ein nach außen über den Nockenträger überstehendes, feststehendes Eingriffselement und das Kulissenelement vorzugsweise seitlich von der Nockenwelle im Gehäuse angeordnet, wobei es sich mit Hilfe des Stellorgans quer zur Nockenwelle bewegen lässt, um das Eingriffselement mit der Kurvenkulisse in Eingriff zu bringen.alternative is provided with advantage that the actuator together with the Engagement element is arranged on the cam carrier and the curve backdrop in a in a housing part of the internal combustion engine arranged backdrop element is formed / arranged. The backdrop element can be adjusted with the aid of the associated actuator move transversely to the camshaft to the engagement element with the curve backdrop to engage and thereby the cam carrier move. In this case, the engagement element is preferably one after projecting outwardly beyond the cam carrier, fixed engagement element and the link element preferably laterally arranged by the camshaft in the housing, which is itself can be moved transversely to the camshaft with the help of the actuator, to bring the engagement element with the curve backdrop in engagement.
Im Folgenden wird die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert. Es zeigt diein the The invention will be explained below with reference to an embodiment shown in the drawing Embodiment explained in more detail. It shows the
Figur eine perspektivische Darstellung des erfindungsgemäßen Ventiltriebs.figure a perspective view of the invention Valve train.
Bei
dem in der Zeichnung nur teilweise dargestellten Ventiltrieb für
eine Mehrzahl von Gaswechselventilen
Jede
der Nockenprofilgruppen
Um
die axiale Verschiebung des Nockenträgers
- 11
- GaswechselventilGas exchange valve
- 22
- GaswechselventilGas exchange valve
- 33
- Nockenwellecamshaft
- 44
- Nockenträgercam support
- 55
- NockenprofilgruppeCam profile group
- 66
- NockenprofilgruppeCam profile group
- 77
- Schlepphebelcam follower
- 88th
- Rollerole
- 99
- Ventilgliedvalve member
- 1010
- VentilspielausgleichselementLash adjuster
- 1111
- Gleitlagerbearings
- 1212
- Lagerbockbearing block
- 1313
- Nockenprofilcam profile
- 1414
- Nockenprofilcam profile
- 1515
- Drehachseaxis of rotation
- 1616
- InnenlängsverzahnungInternal spline
- 1717
- Außenverzahnungexternal teeth
- 1818
- EndeThe End
- 1919
- EndeThe End
- 2020
- Kurvenkulissecurve backdrop
- 2121
- Stellorganactuator
- 2222
- Stellorganactuator
- 2323
- EinrichtungFacility
- 2424
- Eingriffselementengaging member
- 2525
- Nutgroove
- 2626
- Nutgroove
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 4322212 A1 [0003] - DE 4322212 A1 [0003]
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007002802A DE102007002802B4 (en) | 2007-01-18 | 2007-01-18 | Method for switching a valve train of an internal combustion engine between a two-stroke and a four-stroke operation and valve train |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007002802A DE102007002802B4 (en) | 2007-01-18 | 2007-01-18 | Method for switching a valve train of an internal combustion engine between a two-stroke and a four-stroke operation and valve train |
Publications (2)
Publication Number | Publication Date |
---|---|
DE102007002802A1 true DE102007002802A1 (en) | 2008-07-24 |
DE102007002802B4 DE102007002802B4 (en) | 2009-04-09 |
Family
ID=39530763
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102007002802A Active DE102007002802B4 (en) | 2007-01-18 | 2007-01-18 | Method for switching a valve train of an internal combustion engine between a two-stroke and a four-stroke operation and valve train |
Country Status (1)
Country | Link |
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DE (1) | DE102007002802B4 (en) |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010040439A1 (en) * | 2008-10-08 | 2010-04-15 | Daimler Ag | Valve train device |
EP2325444A1 (en) * | 2008-08-13 | 2011-05-25 | Chery Automobile Co., Ltd. | A hydraulic camshaft and a hydraulic controlling system thereof |
WO2012113424A1 (en) * | 2011-02-24 | 2012-08-30 | Daimler Ag | Internal combustion engine valve drive device |
WO2012116677A1 (en) * | 2011-02-28 | 2012-09-07 | Neumayer Tekfor Holding Gmbh | Cam follower and valve gear |
WO2015052196A1 (en) * | 2013-10-09 | 2015-04-16 | Eaton Srl | A valve train assembly |
ITBO20130665A1 (en) * | 2013-11-29 | 2015-05-30 | Ferrari Spa | METHOD FOR CYCLIC DEACTIVATION OF THE CYLINDERS OF AN INTERNAL COMBUSTION ENGINE DURING THE USE AT PARTIALIZED LOAD |
DE102014221794A1 (en) | 2014-10-27 | 2016-04-28 | Schaeffler Technologies AG & Co. KG | Hubvariabler valve drive of an internal combustion engine |
US9732682B2 (en) | 2012-09-07 | 2017-08-15 | Ford Global Technologies, Llc | Internal combustion engine which may be selectively operated by the two-stroke method or the four-stroke method and method for operating such an internal combustion engine |
CN107060942A (en) * | 2017-06-07 | 2017-08-18 | 大连理工大学 | A kind of compact multimode formula valve-driving system |
CN109469527A (en) * | 2018-12-11 | 2019-03-15 | 大连理工大学 | A kind of multi-mode valve actuating mechanism and its control method |
CN109488404A (en) * | 2018-12-11 | 2019-03-19 | 大连理工大学 | A kind of multi-mode valve actuating mechanism and its control method |
CN109488405A (en) * | 2018-12-11 | 2019-03-19 | 大连理工大学 | A kind of multi-mode valve actuating mechanism and its control method |
CN109488403A (en) * | 2018-12-11 | 2019-03-19 | 大连理工大学 | A kind of multi-mode valve actuating mechanism and its control method |
CN109736912A (en) * | 2018-12-11 | 2019-05-10 | 大连理工大学 | A kind of multi-mode valve actuating mechanism and its control method |
CN109915223A (en) * | 2019-03-27 | 2019-06-21 | 大连理工大学 | A kind of highly reliable multi-mode valve actuating mechanism of compact |
CN109958494A (en) * | 2019-03-27 | 2019-07-02 | 大连理工大学 | A kind of compact high efficient multi-mode valve actuating mechanism |
CN110005499A (en) * | 2019-03-27 | 2019-07-12 | 大连理工大学 | A kind of general type multi-mode valve actuating mechanism |
ES2877923A1 (en) * | 2020-06-08 | 2021-11-17 | De Castro De La Fuente Jose Luis Bermudez | INTERNAL COOLING SYSTEM FOR INTERNAL COMBUSTION ENGINES (Machine-translation by Google Translate, not legally binding) |
DE102021001484A1 (en) | 2021-03-22 | 2022-09-22 | Mercedes-Benz Group AG | Valve train for an internal combustion engine, in particular a motor vehicle |
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DE4322212A1 (en) | 1993-07-03 | 1995-01-12 | Bayerische Motoren Werke Ag | Cam-controlled valve actuation for a 4-stroke/8-stroke internal combustion engine |
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