DE102006018946A1 - Internal combustion engine e.g. petrol engine, for automobile, has adjustment device to adjust valve stroke simultaneously with change of compression ratio, so that maximum valve stroke and valve opening- and/or closing time are changeable - Google Patents
Internal combustion engine e.g. petrol engine, for automobile, has adjustment device to adjust valve stroke simultaneously with change of compression ratio, so that maximum valve stroke and valve opening- and/or closing time are changeable Download PDFInfo
- Publication number
- DE102006018946A1 DE102006018946A1 DE102006018946A DE102006018946A DE102006018946A1 DE 102006018946 A1 DE102006018946 A1 DE 102006018946A1 DE 102006018946 A DE102006018946 A DE 102006018946A DE 102006018946 A DE102006018946 A DE 102006018946A DE 102006018946 A1 DE102006018946 A1 DE 102006018946A1
- Authority
- DE
- Germany
- Prior art keywords
- valve
- internal combustion
- combustion engine
- change
- adjustment
- 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.)
- Withdrawn
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
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/04—Engines with variable distances between pistons at top dead-centre positions and cylinder heads
- F02B75/041—Engines with variable distances between pistons at top dead-centre positions and cylinder heads by means of cylinder or cylinderhead positioning
-
- 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
-
- 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
- F01L1/20—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
- 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
- F01L2001/0537—Double overhead camshafts [DOHC]
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
Description
Die Erfindung betrifft eine Verbrennungskraftmaschine bei der eine variable Verdichtung durch eine Verstellung des Zylinderkopfes gegenüber einem Kurbelgehäuse erfolgt, und der Ventilhub mit einer mechanischen variablen Ventilsteuerung verändert wird zur Verstellung der Ventilöffnungszeit und der Ventilschließzeit von Ein- und/oder Auslassventilen.The The invention relates to an internal combustion engine in which a variable Compression by an adjustment of the cylinder head against a crankcase takes place, and the valve lift is changed with a mechanical variable valve timing for adjusting the valve opening time and the valve closing time of inputs and / or Exhaust valves.
Es ist bekannt, dass bei einem Motor mit variabler Verdichtung, bei dem die geometrische Verdichtung dadurch eingestellt wird, dass der Zylinderkopf mit der zum Zylinderkopf gehörenden Büchse und damit die Zylinderkopfbüchseneinheit bildende Baugruppe gegenüber der im Kurbelgehäuse gelagerten Kurbelwelle verschoben wird, wobei das Verdichtungsverhältnis durch den Hub der Gaswechselventile begrenzt wird. Man kann dabei das geometrische Verdichtungsverhältnis nur dann erhöhen, wenn der Ventilhub der Gaswechselventile gleichzeitig reduziert wird. Sonst würde die Gefahr der Kollision zwischen einem Kolben und den Ventilen bestehen oder im Kolben müssen derart tiefe Ventiltaschen vorgesehen werden, die jedoch zu einer Verschlechterung der Abgasemission des Verbrennungsmotors führen würde. Da das geometrische Verdichtungsverhältnis insbesondere in der Teillast erhöht werden soll, um den Wirkungsgrad z.B. eines Ottomotors zu erhöhen, muss dann im Betrieb des Motors für diesen Fall der Ventilhub variabel gestaltet sein und entsprechend reduziert werden. Bei Teillast sind kleinere Ventilhübe sinnvoll, so dass diese Kopplung für den Verbrennungsmotor von Vorteil ist. Bei Verwendung einer drosselfreien Laststeuerung allein über die Variation der Ventilerhebungskurven und nicht über die Verwendung einer Drosselklappe ist dieses nicht einfach zu realisieren. Gleichzeitig muss dann aber auch der Ventilhub der Auslassventile reduziert werden, was für die Motorfunktion im Teillastbetrieb nicht hinderlich ist. Durch die Ventilhubreduzierung in diesem Motorbetrieb, d.h. erhöhtes geometrisches Verdichtungsverhältnis mit reduzierten Ventilhüben auf der Ein- und Auslassventilseite, wird die Ventiltriebreibung reduziert, was zu Kraftstoffverbrauchseinsparungen führt. Die Erhöhung des geometrischen Verdichtungsverhältnisses an Verbrennungsmotoren hat eine wirkungsgradgünstigere Verbrennung zur Folge. Es muss unter allen Umständen vermieden werden, dass bei einer Erhöhung des Verdichtungsverhältnisses des Kolbens, der dann in Richtung des Zylinderkopfes in dem oberen Totpunkt weiter bewegt wird, der Kolben mit den geöffneten Ventilen in Kontakt kommt.It is known that in a variable compression engine, at the geometric compression is adjusted by the cylinder head with the cylinder head belonging to the bush and thus the cylinder head bushing unit facing assembly in the crankcase is shifted crankshaft bearing, wherein the compression ratio the stroke of the gas exchange valves is limited. You can do that geometric compression ratio only then increase when the valve lift of the gas exchange valves is reduced at the same time becomes. Otherwise would the risk of collision between a piston and the valves must exist or in the piston Such deep valve pockets are provided, however, to a Deterioration of the exhaust emission of the internal combustion engine would result. There the geometric compression ratio, especially in the partial load elevated to increase the efficiency, e.g. of a gasoline engine has to increase then in the operation of the engine for This case, the valve lift will be variable and accordingly be reduced. At partial load, smaller valve strokes make sense so this coupling for the internal combustion engine is an advantage. When using a throttle-free Load control alone over the variation of the valve lift curves and not the use a throttle valve, this is not easy to implement. simultaneously but then also the valve lift of the exhaust valves must be reduced, which for the Motor function in partial load operation is not a hindrance. By the Valve lift reduction in this engine mode, i. elevated geometric compression ratio with reduced valve lifts on the intake and exhaust valve side, the valvetrain friction becomes reduced, resulting in fuel economy savings. The increase the geometric compression ratio of internal combustion engines has a lower efficiency Combustion. It must be avoided at all costs at an increase the compression ratio of the piston, which then in the direction of the cylinder head in the upper Dead center is moved further, the piston with the open Valves come into contact.
Aus
der
Es ist Aufgabe der vorliegenden Erfindung, eine kostengünstige, kraftstoffsparende und einfache Verbrennungskraftmaschine mit variabler Verdichtung und mit mechanisch variablen Ventilhub zu schaffen, bei der kein zusätzlicher aufwendiger Betätigungsmechanismus für die Steuerwellen des variablen Ventiltriebs erforderlich ist und trotzdem sichergestellt ist, dass es zu keiner Kollision der Ventile mit dem Kolben kommen kann.It It is the object of the present invention to provide a cost-effective, fuel-efficient and simple variable-combustion engine Compression and with mechanically variable valve lift to create with no additional elaborate actuating mechanism for the Control shafts of the variable valve train is required and still it is ensured that there is no collision of the valves with the Pistons can come.
Gelöst wird diese Aufgabe durch eine mechanische Kopplung der Ein- und Auslassventile mit der gleichzeitigen Verstellung der Verdichtung und des Ventilhubes über eine Verstelleinrichtung, indem mittels einer zwischen Zylinderkopf und einem Kurbelgehäuse vorgesehenen Verstelleinrichtung die Verstellung der Ventilhubbewegung der Ein- und/oder Auslassventile und die Änderung des Verdichtungsverhältnisses gleichzeitig erfolgt, so dass bei einer Änderung des geometrischen Verdichtungsverhältnisses durch eine Lageänderung des Zylinderkopfes gegenüber dem Kurbelgehäuse in Abhängigkeit der Lageänderung der maximale Ventilhub und der Ventilöffnungs- bzw. Ventilschließzeitpunkt der Ein- oder Auslassventile der Verbrennungskraftmaschine veränderlich ist.Is solved this task by a mechanical coupling of the inlet and outlet valves with the simultaneous adjustment of the compression and the valve lift over one Adjustment by means of a between cylinder head and a crankcase provided adjusting the adjustment of the valve lift movement of the Inlet and / or outlet valves and the change in the compression ratio occurs simultaneously, so that when changing the geometric compression ratio by a change of position the cylinder head opposite the crankcase dependent on the change of position the maximum valve lift and the valve opening or closing time the intake or exhaust valves of the internal combustion engine variable is.
Bevorzugt ist vorgesehen, dass die Verstelleinrichtung als ein Verstellgetriebe ausgebildet ist, wobei dieses Verstellgetriebe einerseits mit der mechanisch variablen Ventilsteuerung und andererseits mit dem Kurbelgehäuse über Befestigungsmittel verbunden ist, so dass in vorteilhafter Weise mittels des Verstellgetriebes die Verstellung des maximalen Ventilhubs und des Ventilöffnungs- bzw. Ventilschließzeitpunktes der Einlassventile oder Auslassventile der Verbrennungskraftmaschine stufenlos veränderlich ist und hierdurch vorzugsweise die Laststeuerung der Verbrennungskraftmaschine erfolgt.It is preferably provided that the adjusting device is designed as an adjusting mechanism, wherein this adjusting mechanism is connected on the one hand with the mechanically variable valve control and on the other hand with the crankcase via fastening means, so that in an advantageous manner by means of the adjusting the adjustment of the maximum valve lift and the Ventilöffnungs- or Valve closing timing of the intake valves or exhaust valves of the internal combustion engine is continuously variable and thereby preferably the Laststeue tion of the internal combustion engine takes place.
Eine vorteilhafte Weiterbildung wird darin gesehen, dass mittels des Verstellgetriebes die Verstellung des maximalen Ventilhubs und des Ventilöffnungs- bzw. Ventilschließzeitpunktes der Einlassventile oder der Auslassventile der Verbrennungskraftmaschine stufenweise mit mindestens zwei Stufen veränderlich ist.A advantageous development is seen in that by means of Variable speed adjustment of the maximum valve lift and the valve opening or valve closing time the intake valves or the exhaust valves of the internal combustion engine gradually variable with at least two stages.
Eine günstige Ausführungsform wird darin gesehen, dass unabhängig von der Lageänderung des Zylinderkopfes gegenüber dem Kurbelgehäuse und somit unabhängig von dem eingestellten Verdichtungsverhältnis der Verbrennungskraftmaschine zusätzlich eine Veränderung der relativen Winkellage zwischen Kurbelwelle und mindestens einer Nockenwelle durch eine Nockenwellenverstellung vorgesehen ist.A favorable embodiment is seen in that independent from the change in position of the Cylinder head opposite the crankcase and thus independent from the set compression ratio of the internal combustion engine additionally a change the relative angular position between the crankshaft and at least one Camshaft is provided by a camshaft adjustment.
Wesentlich an der neuen Verbrennungskraftmaschine mit variabler Verdichtung und mit mechanisch variablem Ventilhub ist, dass bei Verstellung von der Verdichtung gleichzeitig der Ventilhub verstellt wird und kein aufwendiger unabhängig davon arbeitender zusätzlicher Betätigungsmechanismus für die Steuerwellen des variablen Ventiltriebs mehr nötig ist. Hierdurch können erhebliche Kosten bei der Aktuatorik zur Ventilhubverstellung eingespart werden. Ferner ist durch die Kopplung der Verstellung von Ventilhub und Verdichtung sichergestellt, dass es zu keiner Kollision der Ventile mit dem Kolben kommen kann, was der Fall wäre, wenn an einem Verbrennungsmotorenkonzept mit variabler Verdichtung und veränderlichem Ventilhub unterschiedliche Aktuatoren für die jeweilige Verstellung eines Parameters vorgesehen sind und es bei Ausfall eines Aktuators zu Kollisionsproblemen zwischen Kolben und Ventil kommen kann. Dabei bleiben die Kosten des gesamten Steuerungsaufwandes des Motors mit veränderlicher Verdichtung und veränderlicher Ventilsteuerung bei Einsatz der erfindungsgemäßen Verstelleinrichtung gering. Durch die mechanische Kopplung kann außerdem ein robuster Verstellmechanismus realisiert werden, der auch bei widrigen Motoreinsatzbedingungen sicher und zuverlässig arbeitet. Selbst bei tiefen Temperaturen sind keine Ausfälle von zusätzlich aufwendigen Aktuatoren zu befürchten, die sonst zur Regelung der Ventilsteuerzeit benötigt werden.Essential on the new internal combustion engine with variable compression and with mechanically variable valve lift is that when adjusting the compression at the same time the valve lift is adjusted and no consuming independent of which additional working Actuation mechanism for the control shafts the variable valve train is more necessary. This can be significant Costs are saved in the actuator for valve lift. Furthermore, by the coupling of the adjustment of valve lift and Compression ensures that there is no collision of the valves can come with the piston, which would be the case when working on an internal combustion engine concept different with variable compression and variable valve lift Actuators for the respective adjustment of a parameter are provided and it in case of failure of an actuator to collision problems between pistons and valve can come. The costs of the entire control effort remain of the engine with changeable Compaction and changeable Valve control when using the adjusting device according to the invention low. The mechanical coupling also allows a robust adjustment mechanism be realized, even in adverse engine conditions safe and reliable is working. Even at low temperatures, there are no failures of additionally expensive actuators to fear otherwise needed to control the valve timing.
Zusätzlich kann durch diese kostengünstige Konstruktion zur Verstellung des Verdichtungsverhältnisses und der Ventilsteuerung diese Lösung auch bei Großserienmotoren zur Kraftstoffeinsparung genutzt werden. Es ist bekannt, dass durch die Veränderung des Verdichtungsverhältnisses neben der Verwendung von variablen Steuerzeiten deutlich Kraftstoff eingespart werden kann, so dass damit ein hohes Potenzial zur Einsparung von Kraftstoff an Großserienmotoren besteht.In addition, can through this cost-effective design for adjusting the compression ratio and the valve control this solution too for large series engines be used to save fuel. It is known that through the change the compression ratio In addition to the use of variable timing significantly fuel can be saved, so that there is a high potential for saving from fuel to mass-produced engines consists.
Die Erfindung wird nachfolgend anhand eines schematisch in Zeichnungen dargestellten Ausführungsbeispieles näher erläutert.The The invention is described below with reference to a schematic in drawings illustrated embodiment explained in more detail.
Es zeigen:It demonstrate:
Die
Verstelleinrichtung
Da eine niedrige Last mit kleinem Ventilhub eingestellt wird, kann bei niedriger Last das geometrische Verdichtungsverhältnis möglichst hoch zugeordnet werden. Im Teillastbetrieb, in dem die Verbrennungskraftmaschine, z.B. in Automobilen im Straßenverkehr am häufigsten betrieben wird, arbeitet dann die Verbrennungskraftmaschine mit einem höheren Wirkungsgrad, wodurch der Kraftstoffverbrauch deutlich gesenkt werden kann. Hohe Last wird dagegen mit großem Ventilhub und geringer geometrischer Verdichtung gekoppelt.There a low load with a small valve lift can be set at low load, the geometric compression ratio as possible be assigned high. In partial load operation, in which the internal combustion engine, e.g. in automobiles in traffic most frequently is operated, then works with the internal combustion engine a higher one Efficiency, which significantly reduces fuel consumption can. High load, on the other hand, comes with a large valve lift and less Coupled with geometric compaction.
Die
Verstellung des Zylinderkopfbüchseneinheit
Die
Erfindung beschränkt
sich bei der Verstelleinheit
- 11
- Einlassventilintake valve
- 22
- Auslassventiloutlet valve
- 33
- EinlasssteuerwelleIntake camshaft
- 44
- AuslasssteuerwelleAuslasssteuerwelle
- 55
- Exzentrizität eEccentricity e
- 66
- Kurbelgehäusecrankcase
- 77
- Schubstangepushrod
- 88th
- Zylinderkopfcylinder head
- 99
- Verstelleinrichtungadjustment
- 1010
- ZylinderkopfbüchseneinheitCylinder head bushing unit
- 1111
- Zylinderbüchsecylinder liner
- 1212
- Kolbenpiston
- 1313
- Befestigungsmittelfastener
- 1414
- Verstelleinheitadjustment
- P1P1
- Druckprint
- P2P2
- Druckprint
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006018946A DE102006018946A1 (en) | 2006-04-24 | 2006-04-24 | Internal combustion engine e.g. petrol engine, for automobile, has adjustment device to adjust valve stroke simultaneously with change of compression ratio, so that maximum valve stroke and valve opening- and/or closing time are changeable |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006018946A DE102006018946A1 (en) | 2006-04-24 | 2006-04-24 | Internal combustion engine e.g. petrol engine, for automobile, has adjustment device to adjust valve stroke simultaneously with change of compression ratio, so that maximum valve stroke and valve opening- and/or closing time are changeable |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102006018946A1 true DE102006018946A1 (en) | 2007-10-25 |
Family
ID=38536824
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102006018946A Withdrawn DE102006018946A1 (en) | 2006-04-24 | 2006-04-24 | Internal combustion engine e.g. petrol engine, for automobile, has adjustment device to adjust valve stroke simultaneously with change of compression ratio, so that maximum valve stroke and valve opening- and/or closing time are changeable |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102006018946A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008035200A2 (en) * | 2006-09-22 | 2008-03-27 | Toyota Jidosha Kabushiki Kaisha | Spark ignition type internal combustion engine |
WO2014010018A1 (en) * | 2012-07-09 | 2014-01-16 | トヨタ自動車株式会社 | Internal combustion engine |
EP2812549A4 (en) * | 2012-02-09 | 2016-01-13 | Edward Charles Mendler | Variable compression ratio engine |
DE102016006475A1 (en) * | 2016-05-25 | 2017-11-30 | Audi Ag | Method for operating an internal combustion engine and corresponding internal combustion engine |
AT520290B1 (en) * | 2017-12-19 | 2019-03-15 | Avl List Gmbh | Internal combustion engine |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4104872C2 (en) * | 1991-02-18 | 1993-07-15 | Wolfgang 6074 Roedermark De Schieck | |
DE4211589A1 (en) * | 1992-04-07 | 1993-10-14 | Audi Ag | IC engine with variable compression ratio - has conventional head and sliding cylinder within block displaced by hydraulically-operated sliders depending on load and rpm |
-
2006
- 2006-04-24 DE DE102006018946A patent/DE102006018946A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4104872C2 (en) * | 1991-02-18 | 1993-07-15 | Wolfgang 6074 Roedermark De Schieck | |
DE4211589A1 (en) * | 1992-04-07 | 1993-10-14 | Audi Ag | IC engine with variable compression ratio - has conventional head and sliding cylinder within block displaced by hydraulically-operated sliders depending on load and rpm |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008035200A2 (en) * | 2006-09-22 | 2008-03-27 | Toyota Jidosha Kabushiki Kaisha | Spark ignition type internal combustion engine |
WO2008035200A3 (en) * | 2006-09-22 | 2008-05-29 | Toyota Motor Co Ltd | Spark ignition type internal combustion engine |
US7997241B2 (en) | 2006-09-22 | 2011-08-16 | Toyota Jidosha Kabushiki Kaisha | Spark ignition type internal combustion engine |
EP2812549A4 (en) * | 2012-02-09 | 2016-01-13 | Edward Charles Mendler | Variable compression ratio engine |
WO2014010018A1 (en) * | 2012-07-09 | 2014-01-16 | トヨタ自動車株式会社 | Internal combustion engine |
JP5831636B2 (en) * | 2012-07-09 | 2015-12-09 | トヨタ自動車株式会社 | Internal combustion engine |
JPWO2014010018A1 (en) * | 2012-07-09 | 2016-06-20 | トヨタ自動車株式会社 | Internal combustion engine |
DE102016006475A1 (en) * | 2016-05-25 | 2017-11-30 | Audi Ag | Method for operating an internal combustion engine and corresponding internal combustion engine |
DE102016006475B4 (en) | 2016-05-25 | 2018-03-29 | Audi Ag | Method for operating an internal combustion engine and corresponding internal combustion engine |
AT520290B1 (en) * | 2017-12-19 | 2019-03-15 | Avl List Gmbh | Internal combustion engine |
AT520290A4 (en) * | 2017-12-19 | 2019-03-15 | Avl List Gmbh | Internal combustion engine |
DE102018132778A1 (en) | 2017-12-19 | 2019-06-19 | Avl List Gmbh | Internal combustion engine |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE112004001450B4 (en) | Device for an internal combustion engine | |
DE10314683A1 (en) | Variable valve lift control for an internal combustion engine with a camshaft at the bottom | |
DE10220904A1 (en) | Device for adjusting the stroke of a valve actuated by a camshaft | |
DE19908286B4 (en) | Variable valve control for internal combustion engines | |
EP1760278A2 (en) | Lift-variable valve-operating system for internal combustion engine | |
DE102006018946A1 (en) | Internal combustion engine e.g. petrol engine, for automobile, has adjustment device to adjust valve stroke simultaneously with change of compression ratio, so that maximum valve stroke and valve opening- and/or closing time are changeable | |
DE10312961C5 (en) | Device for the variable actuation of gas exchange valves of internal combustion engines | |
EP1457645B1 (en) | Valve gear for an internal-combustion engine | |
DE10323665B4 (en) | Variable valve lifting device for stroke adjustment of the gas exchange valves of an internal combustion engine | |
DE102005039315A1 (en) | Mix-lubricated internal combustion engine | |
DE10311069B3 (en) | Stroke function setting device for IC engine valve with selective locking of intermediate lever with pivot lever or valve lever for altering valve stroke function | |
EP1493902A1 (en) | Device for switching off a valve | |
EP1375843B1 (en) | Internal combustion engine | |
DE102008015137A1 (en) | Actuating device for gas exchange valve of internal combustion engine, particularly for motor vehicle, comprises moving cam, which impinges gas exchange valve directly or indirectly, where cam is oscillating cam moved by oscillating drive | |
EP2716882B1 (en) | Mechanically controllable valve drive for a reciprocating piston engine | |
EP1608852B1 (en) | Device for the variable actuation of gas exchange valves of internal combustion engines and method for operating said device | |
DE19807351C2 (en) | Internal combustion engine | |
DE102007031815A1 (en) | Valve gear for internal combustion engine, has control unit adjusting roller and formed at cam arrangement of cam shaft, where roller is admittable with different cam contours by control unit based on switched-rolling position of roller | |
EP1854967B1 (en) | Cylinder head for a combustion engine with a variable stroke valve operating mechanism | |
DE102018130428A1 (en) | Variable valve train with at least two working positions | |
DE10138741A1 (en) | Internal combustion engine with valve lift adjustment, has second rocker lever operated by first rocker lever that opens valve in such a way that rocker levers are parallel when valve is closed | |
DE112005002543B4 (en) | Internal combustion engine and a method for operating an internal combustion engine | |
DE102015223677A1 (en) | Cylinder head for an internal combustion engine | |
DE102010009909B3 (en) | Reciprocating piston engine for adjustment compression ratio in crankshaft of combustion engine, comprises crankshaft with crank pin, at which lever element is connected with corresponding piston rod | |
DE102021005258A1 (en) | Valve actuation device for a valve train of an internal combustion engine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8122 | Nonbinding interest in granting licences declared | ||
8139 | Disposal/non-payment of the annual fee |