DE102013105391B4 - Changeover valve and internal combustion engine with such a changeover valve - Google Patents
Changeover valve and internal combustion engine with such a changeover valve Download PDFInfo
- Publication number
- DE102013105391B4 DE102013105391B4 DE102013105391.2A DE102013105391A DE102013105391B4 DE 102013105391 B4 DE102013105391 B4 DE 102013105391B4 DE 102013105391 A DE102013105391 A DE 102013105391A DE 102013105391 B4 DE102013105391 B4 DE 102013105391B4
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- Germany
- Prior art keywords
- switching
- control piston
- locking
- groove
- locking bolt
- 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.)
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Classifications
-
- 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
- F02D15/02—Varying compression ratio by alteration or displacement of piston stroke
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- 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
- F02B75/045—Engines with variable distances between pistons at top dead-centre positions and cylinder heads by means of a variable connecting rod length
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/52—Mechanical actuating means with crank, eccentric, or cam
- F16K31/528—Mechanical actuating means with crank, eccentric, or cam with pin and slot
- F16K31/5286—Mechanical actuating means with crank, eccentric, or cam with pin and slot comprising a sliding valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/56—Mechanical actuating means without stable intermediate position, e.g. with snap action
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
Umschaltventil (36) für einen Verbrennungsmotor, welcher ein einstellbares Verdichtungsverhältnis aufweist, nämlich zum Steuern eines Hydraulikölstroms des Verbrennungsmotors, mit einem bei Anliegen eines Steuerdrucks verlagerbaren Steuerkolben (39), der abhängig von seiner Schaltstellung den Hydraulikölstrom steuert, und mit einem Schaltmechanismus für den Steuerkolben (39), wobei der Schaltmechanismus zumindest ein Federelement (43), das der Verlagerung des Steuerkolbens infolge des Steuerdrucks entgegenwirkt, einen feststehenden Rastierbolzen (45) mit einer kulissenartigen Schaltnut (46) und mindestens eine in die Schaltnut (46) eingreifende und über den Steuerkolben (39) relativ zum Rastierbolzen (45) verlagerbare Rastierkugel (47) umfasst, wobei die Schaltnut (46) Rastierpositionen (48, 49) für die oder jede Rastierkugel (47) in den Schaltstellungen des Steuerkolbens (39) bereitstellt.Switching valve (36) for an internal combustion engine, which has an adjustable compression ratio, namely for controlling a hydraulic oil flow of the internal combustion engine, with a control piston (39) which can be displaced when a control pressure is applied and which controls the hydraulic oil flow depending on its switching position, and with a switching mechanism for the control piston (39), the switching mechanism having at least one spring element (43) which counteracts the displacement of the control piston as a result of the control pressure, a fixed locking bolt (45) with a link-like switching groove (46) and at least one engaging in the switching groove (46) and above the Control piston (39) comprises locking ball (47) displaceable relative to locking bolt (45), the switching groove (46) providing locking positions (48, 49) for the or each locking ball (47) in the switching positions of control piston (39).
Description
Die Erfindung betrifft ein Umschaltventil für einen Verbrennungsmotor mit einem einstellbaren Verdichtungsverhältnis nach dem Oberbegriff des Patentanspruchs 1 und einen Verbrennungsmotor nach dem Oberbegriff des Patentanspruchs 10.The invention relates to a switchover valve for an internal combustion engine with an adjustable compression ratio according to the preamble of claim 1 and an internal combustion engine according to the preamble of
In den Hydraulikkammern
Die Verstellung der Exzenter-Verstelleinrichtung
Die Hydraulikkammern
Wie oben ausgeführt, wird das Hydrauliköl, welches auf die in den Hydraulikkammern
Nach der
Aufgabe der Erfindung ist es, eines neuartiges Umschaltventil für einen Verbrennungsmotor mit einem einstellbaren Verdichtungsverhältnis und einen Verbrennungsmotor mit einem solchen Umschaltventil zu schaffen.The object of the invention is to create a novel switchover valve for an internal combustion engine with an adjustable compression ratio and an internal combustion engine with such a switchover valve.
Diese Aufgabe wird durch ein Umschaltventil gemäß Anspruch 1 gelöst. Das erfindungsgemäße Umschaltventil umfasst einen bei Anliegen eines Steuerdrucks verlagerbaren Steuerkolben, der abhängig von seiner Schaltstellung den Hydraulikölstrom steuert, und einen Schaltmechanismus für den Steuerkolben, wobei der Schaltmechanismus zumindest ein Federelement, das der Verlagerung des Steuerkolbens infolge des Steuerdrucks entgegenwirkt, einen feststehenden Rastierbolzen mit einer kulissenartigen Schaltnut und mindestens eine in die Schaltnut eingreifende und über den Steuerkolben relativ zum Rastierbolzen verlagerbare Rastierkugel umfasst, wobei die Schaltnut Rastierpositionen für die oder jede Rastierkugel in den Schaltstellungen des Steuerkolbens bereitstellt.This object is achieved by a switch valve according to claim 1. The switching valve according to the invention comprises a control piston which can be displaced when a control pressure is applied and which controls the hydraulic oil flow depending on its switching position, and a switching mechanism for the control piston, the switching mechanism at least one spring element which counteracts the displacement of the control piston as a result of the control pressure, a fixed locking pin with a Link-like switching groove and at least one locking ball engaging in the switching groove and displaceable via the control piston relative to the locking bolt, the switching groove providing locking positions for the or each locking ball in the switching positions of the control piston.
Das erfindungsgemäße Umschaltventil für einen Verbrennungsmotor mit einem einstellbaren Verdichtungsverhältnis verfügt einerseits über einen einfacheren Aufbau und andererseits über eine kompaktere Bauform als das aus der
Vorzugsweise ist die Schaltnut von zwei in Axialrichtung des Rastierbolzens gesehen beabstandeten Führungskurven definiert, wobei in jeder Schaltstellung des Steuerkolbens das Federelement die oder jede Rastierkugel gegen eine jeweilige von einer ersten Führungskurve bereitgestellte Rastierposition drückt, und wobei bei Überführung des Steuerkolbens zwischen seinen Schaltstellungen die oder jede Rastierkugel an einer von der ersten Führungskurve beabstandeten zweiten Führungskurve zur Anlage kommt. Dies unterstützt den einfachen Aufbau des Umschaltventils bei kompakter Bauform desselben.The switching groove is preferably defined by two guide cams spaced apart as seen in the axial direction of the locking bolt, wherein in each switching position of the control piston the spring element presses the or each locking ball against a respective locking position provided by a first guide cam, and when the control piston is transferred between its switching positions, the or each Locking ball comes to rest on a second guide curve spaced from the first guide curve. This supports the simple structure of the switchover valve with its compact design.
Vorzugsweise drückt in jeder Schaltstellung des Steuerkolbens die oder jede Rastierkugel derart gegen die jeweilige von der ersten Führungskurve bereitgestellte Rastierposition, dass in jeder Rastierposition ein Mittelpunkt der Rastierkugel immer auf der in Sollbewegungsrichtung führenden Seite eines benachbart zu der jeweiligen Rastierposition ausgebildeten Wendepunkts der zweiten Führungskurve liegt. Hierdurch können Fehlschaltungen des Umschaltventils vermieden werden.In each switching position of the control piston, the or each locking ball preferably presses against the respective locking position provided by the first guide curve in such a way that in each locking position a center of the locking ball is always on the side leading in the target direction of movement of a turning point of the second guide curve formed adjacent to the respective locking position. In this way, incorrect switching of the switchover valve can be avoided.
Nach einer vorteilhaften Weiterbildung durchdringt der Rastierbolzen eine mittlere Ausnehmung im Steuerkolben, wobei die oder jede Rastierkugel einerseits in eine an einer Innenfläche der Ausnehmung des Steuerkolbens ausgebildete Führungsnut und andererseits in die an einer Außenfläche des Rastierbolzens ausgebildete Schaltnut eingreift, wobei die Führungsnut die Schaltnut radial außen zumindest abschnittsweise umschließt. Dies unterstützt den einfachen Aufbau des Umschaltventils bei kompakter Bauform desselben.According to an advantageous development, the locking bolt penetrates a central recess in the control piston, the or each locking ball engaging on the one hand in a guide groove formed on an inner surface of the recess of the control piston and on the other hand in the switching groove formed on an outer surface of the locking bolt, the guide groove engaging the switching groove radially on the outside encloses at least in sections. This supports the simple structure of the switchover valve with its compact design.
Der Verbrennungsmotor ist in Patentanspruchs 10 definiert.The internal combustion engine is defined in
Bevorzugte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung. Ausführungsbeispiele der Erfindung werden, ohne hierauf beschränkt zu sein, an Hand der Zeichnung näher erläutert. Dabei zeigt:
-
1 ein Detail eines aus dem Stand der Technik bekannten Verbrennungsmotors mit einstellbarem Verdichtungsverhältnis; -
2 einen Querschnitt durch ein erfindungsgemäßes Umschaltventil in einer ersten Schaltstellung desselben; -
3 einen Querschnitt durch das erfindungsgemäße Umschaltventil in einer zweiten Schaltstellung desselben; -
4 ein Detail der2 im Bereich der Schaltnut und einer Rastierkugel in abgewickelter Darstellung der Schaltnut; -
5 ein Detail der3 im Bereich der Schaltnut und einer Rastierkugel in abgewickelter Darstellung der Schaltnut; -
6 das erfindungsgemäße Umschaltventil zusammen mit Hydraulikkammern, die mit den Exzenterstangen zusammenwirken, in der ersten Schaltstellung des Umschaltventils; und -
7 das erfindungsgemäße Umschaltventil zusammen mit Hydraulikkammern, die mit den Exzenterstangen zusammenwirken, in der zweiten Schaltstellung des Umschaltventils.
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1 a detail of an internal combustion engine known from the prior art with an adjustable compression ratio; -
2 a cross section through a switch valve according to the invention in a first switching position of the same; -
3 a cross section through the switching valve according to the invention in a second switching position of the same; -
4th a detail of the2 in the area of the switching groove and a locking ball in a developed view of the switching groove; -
5 a detail of the3 in the area of the switching groove and a locking ball in a developed view of the switching groove; -
6th the switching valve according to the invention together with hydraulic chambers which interact with the eccentric rods in the first switching position of the switching valve; and -
7th the switching valve according to the invention together with hydraulic chambers which interact with the eccentric rods in the second switching position of the switching valve.
Die Erfindung betrifft einen Verbrennungsmotor mit einem einstellbaren Verdichtungsverhältnis und ein Umschaltventil für einen solchen Verbrennungsmotor. Der grundsätzliche Aufbau eines solchen Verbrennungsmotors ist dem Fachmann geläufig und wurde unter Bezugnahme auf
Ein Verbrennungsmotor mit einstellbarem Verdichtungsverhältnis weist im Bereich jedes Pleuels
In einer Ausnehmung bzw. Bohrung
In
Dann, wenn wie in
Gemäß
Es sei an dieser Stelle darauf hingewiesen, dass am Anschluss
Das Umschaltventil
Der Steuerkolben
Der Steuerkolben
Im gezeigten, bevorzugten Ausführungsbeispiel ist die am Rastierbolzen
Wie am besten
Dann, wenn bei Aufbau eines definierten Steuerdrucks im Druckraum
Dabei kann sich die jeweilige Rastierkugel
Um Fehlschaltungen des Umschaltventils
Fehlschaltungen können so vermieden werden, da sichergestellt wird, dass die Rastierkugel
Im gezeigten, bevorzugten Ausführungsbeispiel des Umschaltventils
Die oder jede Rastierkugel
Bedingt dadurch, dass die Rastierkugel
Soll demnach das Umschaltventil
Wie oben erwähnt, wirkt die Federkraft des Federelements
Infolge des obigen Zusammenspiels der oder jeder Rastierkugel
Wie bereits ausgeführt, schirmt der Steuerkolben
Das Umschaltventil
In die zylindrische Wand
Im gezeigten, bevorzugten Ausführungsbeispiel ist in die zylindrische Wandung
Claims (10)
Priority Applications (1)
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DE102013105391.2A DE102013105391B4 (en) | 2013-05-27 | 2013-05-27 | Changeover valve and internal combustion engine with such a changeover valve |
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DE102013105391.2A DE102013105391B4 (en) | 2013-05-27 | 2013-05-27 | Changeover valve and internal combustion engine with such a changeover valve |
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DE102013105391A1 DE102013105391A1 (en) | 2014-11-27 |
DE102013105391B4 true DE102013105391B4 (en) | 2021-12-23 |
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Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102015100662A1 (en) * | 2014-12-19 | 2016-06-23 | Hilite Germany Gmbh | Hydraulic valve for switching a control piston of a connecting rod |
DE102015111273A1 (en) * | 2015-03-27 | 2016-09-29 | Hilite Germany Gmbh | Hydraulic valve and connecting rod with a hydraulic valve |
DE102016208329B4 (en) * | 2016-05-13 | 2019-10-31 | Schaeffler Technologies AG & Co. KG | Control system and check valve for placement in such a control system |
CN113804845B (en) * | 2020-06-11 | 2024-03-15 | 力合科技(湖南)股份有限公司 | Water quality on-line monitoring sampling device |
Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2989954A (en) | 1959-09-21 | 1961-06-27 | Continental Motors Corp | Internal-combustion engine |
US5417185A (en) | 1993-02-18 | 1995-05-23 | Beattie; John F. E. | Variable compression piston |
DE69108572T2 (en) | 1990-01-17 | 1995-08-17 | Mitsubishi Motors Corp | Device for changing the compression ratio for an internal combustion engine. |
DE102004053225A1 (en) | 2004-11-04 | 2006-05-11 | Daimlerchrysler Ag | Reciprocating piston engine for motor vehicle has locking device which has two adjustable bolts and first spring element is arranged between bolts which presses bolts |
DE102005055199A1 (en) | 2005-11-19 | 2007-05-24 | Fev Motorentechnik Gmbh | Reciprocating internal combustion engine e.g. commercial vehicle diesel engine, has eccentric tappet moved along length of piston rod, where changeable resistor affects adjustment movement of tappet and effects adjustment movement of tappet |
WO2010108582A1 (en) | 2009-03-26 | 2010-09-30 | Ixetic Bad Homburg Gmbh | Apparatus for changing the compression ratio in an internal combustion engine |
DE102010016037A1 (en) | 2010-03-19 | 2011-09-22 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Switchover valve, particularly for controlling hydraulic fluid flow of internal combustion engine, has ballpoint mechanism, which is engaged by applying actuating impulse to actuating unit of ballpoint mechanism |
DE102010061361A1 (en) | 2010-12-20 | 2012-04-26 | Dr.Ing.H.C. F. Porsche Ag | Reversing valve for controlling fluid flow in e.g. petrol engine of person motor car, has switching mechanism for shifting valve from one position into another position by predetermined actuating pressure depending on oil pressure |
DE102010061363A1 (en) | 2010-12-20 | 2012-06-21 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Switching valve for controlling fluid flow in combustion engine of vehicle, comprises switching unit, which is adapted to shift switching valve into primary switching position and secondary switching position |
DE102010061359A1 (en) | 2010-12-20 | 2012-06-21 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Switching valve for controlling fluid flow in combustion engine of vehicle, comprises switching unit, which is adapted to shift switching valve into primary switching position and secondary switching position |
DE102010061362A1 (en) | 2010-12-20 | 2012-06-21 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Reversing valve for controlling engine oil flow in spark ignition petrol engine of passenger motor car, has switching mechanism for shifting valve between switching positions using pressure that is generated by pressure generating device |
DE102010061360A1 (en) | 2010-12-20 | 2012-06-21 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Reversing valve for controlling engine oil flow in spark ignition petrol engine of passenger motor car, has two working chambers brought in fluid communication with engine inner space via fluid conduits |
DE102011108790A1 (en) | 2011-07-29 | 2013-01-31 | Fev Gmbh | Reciprocating piston engine has adjusting device for adjusting adjustable variable compression ratio using engine forces of reciprocating piston engine, drive mechanism for driving adjusting device and oil supply system |
DE102012014917A1 (en) | 2011-07-29 | 2013-02-07 | Fev Gmbh | Reciprocating piston engine for motor vehicle, has pressure pulse generator provided between crankshaft and oil reservoir, such that pressure pulse generated by pulse generator is controlled over oil supply control of driving mechanism |
-
2013
- 2013-05-27 DE DE102013105391.2A patent/DE102013105391B4/en active Active
Patent Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2989954A (en) | 1959-09-21 | 1961-06-27 | Continental Motors Corp | Internal-combustion engine |
DE69108572T2 (en) | 1990-01-17 | 1995-08-17 | Mitsubishi Motors Corp | Device for changing the compression ratio for an internal combustion engine. |
US5417185A (en) | 1993-02-18 | 1995-05-23 | Beattie; John F. E. | Variable compression piston |
DE102004053225A1 (en) | 2004-11-04 | 2006-05-11 | Daimlerchrysler Ag | Reciprocating piston engine for motor vehicle has locking device which has two adjustable bolts and first spring element is arranged between bolts which presses bolts |
DE102005055199A1 (en) | 2005-11-19 | 2007-05-24 | Fev Motorentechnik Gmbh | Reciprocating internal combustion engine e.g. commercial vehicle diesel engine, has eccentric tappet moved along length of piston rod, where changeable resistor affects adjustment movement of tappet and effects adjustment movement of tappet |
WO2010108582A1 (en) | 2009-03-26 | 2010-09-30 | Ixetic Bad Homburg Gmbh | Apparatus for changing the compression ratio in an internal combustion engine |
DE102010016037A1 (en) | 2010-03-19 | 2011-09-22 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Switchover valve, particularly for controlling hydraulic fluid flow of internal combustion engine, has ballpoint mechanism, which is engaged by applying actuating impulse to actuating unit of ballpoint mechanism |
DE102010061361A1 (en) | 2010-12-20 | 2012-04-26 | Dr.Ing.H.C. F. Porsche Ag | Reversing valve for controlling fluid flow in e.g. petrol engine of person motor car, has switching mechanism for shifting valve from one position into another position by predetermined actuating pressure depending on oil pressure |
DE102010061363A1 (en) | 2010-12-20 | 2012-06-21 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Switching valve for controlling fluid flow in combustion engine of vehicle, comprises switching unit, which is adapted to shift switching valve into primary switching position and secondary switching position |
DE102010061359A1 (en) | 2010-12-20 | 2012-06-21 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Switching valve for controlling fluid flow in combustion engine of vehicle, comprises switching unit, which is adapted to shift switching valve into primary switching position and secondary switching position |
DE102010061362A1 (en) | 2010-12-20 | 2012-06-21 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Reversing valve for controlling engine oil flow in spark ignition petrol engine of passenger motor car, has switching mechanism for shifting valve between switching positions using pressure that is generated by pressure generating device |
DE102010061360A1 (en) | 2010-12-20 | 2012-06-21 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Reversing valve for controlling engine oil flow in spark ignition petrol engine of passenger motor car, has two working chambers brought in fluid communication with engine inner space via fluid conduits |
DE102011108790A1 (en) | 2011-07-29 | 2013-01-31 | Fev Gmbh | Reciprocating piston engine has adjusting device for adjusting adjustable variable compression ratio using engine forces of reciprocating piston engine, drive mechanism for driving adjusting device and oil supply system |
DE102012014917A1 (en) | 2011-07-29 | 2013-02-07 | Fev Gmbh | Reciprocating piston engine for motor vehicle, has pressure pulse generator provided between crankshaft and oil reservoir, such that pressure pulse generated by pulse generator is controlled over oil supply control of driving mechanism |
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