EP0726385B1 - Anordnung zur Zufuhr von Druckmedium zu einem Einlassventil für einen Brennraum einer Brennkraftmaschine - Google Patents
Anordnung zur Zufuhr von Druckmedium zu einem Einlassventil für einen Brennraum einer Brennkraftmaschine Download PDFInfo
- Publication number
- EP0726385B1 EP0726385B1 EP95114166A EP95114166A EP0726385B1 EP 0726385 B1 EP0726385 B1 EP 0726385B1 EP 95114166 A EP95114166 A EP 95114166A EP 95114166 A EP95114166 A EP 95114166A EP 0726385 B1 EP0726385 B1 EP 0726385B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- inlet
- shaft
- valve head
- arrangement according
- 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
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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
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/20—Shapes or constructions of valve members, not provided for in preceding subgroups of this group
Definitions
- the invention is based on an arrangement for feeding from below Pressurized gaseous medium to an inlet valve for a combustion chamber of an internal combustion engine according to the genus of Claim 1.
- an arrangement for feeding from below Pressurized gaseous medium to an inlet valve for a combustion chamber of an internal combustion engine is known (JP-A-59-158 363), the inlet valve having a valve disk and a massive shaft, to which air under pressure in one Cavity between the stem and a valve guide sleeve.
- the air is supplied to the side of the shaft via the Connection, the air outlet at a the combustion chamber facing end of the valve guide sleeve is provided.
- the known valve is solid and has no cavity.
- an inlet valve is known from US 1,799,397, that has a valve disc and a hollow stem with one Has a cavity through which a medium can flow.
- Medium is fuel that is only in liquid Form is present.
- the liquid fuel gets over at least one inlet shaft opening provided in the shaft the cavity and at least one on the combustion chamber the side of the intake valve facing away from the internal combustion engine provided outlet then into the combustion chamber.
- the delivery of the liquid fuel via the at least one Exhaust opening is said to improve combustion in the Run idle when the engine is cold and take place in addition to the intended fuel delivery in a Intake pipe of the internal combustion engine by means of a carburetor.
- An indication of avoiding condensation from The fuel on the valve plate of the injection valve is that recognized state of the art not removable.
- From DE-OS 36 00 067 is also an inlet valve known, which has a hollow shaft in which a Exhaust valve is slidably mounted.
- the exhaust valve has an exhaust valve plate, part of a Inlet valve plate of the inlet valve is of the type that in the closed position of the exhaust valve Exhaust valve disc flush with the intake valve disc completes.
- Internal combustion engine trapped exhaust gases over the hollow Drain the inlet valve stem from the combustion chamber.
- the Exhaust gases flow out of the hollow stem of the intake valve from several outlet openings, which are slit-shaped except an outer surface of the hollow shaft are.
- the outlet valve is closed to over the open inlet valve Intake fuel-air mixture from an inlet duct.
- the fuel-air mixture is usually from one
- the fuel injector processes the fuel in Form of a jet of fuel towards the inlet valve delivers.
- the one leaving the fuel injector Fuel breaks down into the finest droplets of fuel to produce the most homogeneous fuel-air mixture possible. It can, especially when cold Internal combustion engine or in the event of sudden load changes a condensation of the fuel droplets on the inner walls the inlet duct, on the inner walls of the combustion chamber and come in particular on the valve plate of the inlet valve, wherein a wall film of fuel forms. From a Such wall film can only be relatively large Detach fuel drops, which then become one in the combustion chamber locally over-greased fuel-air mixture. A over-greased fuel-air mixture only burns incomplete so that the portion becomes more harmful Components in the exhaust gas increased accordingly.
- claim 1 has the advantage that a condensation of the for example from a fuel injector dispensed fuel, especially on the valve plate of the Intake valve is avoided.
- the inlet valve according to the invention opposite the prior art has an increased life.
- the drawing shows a partial sectional view Inlet valve 1 designed according to the invention, which in particular for a mixture-compressing, spark-ignited Internal combustion engine is provided.
- the inlet valve 1 is in a cylinder head 3 of the internal combustion engine and for example in a valve guide sleeve 7 slidably mounted.
- the inlet valve 1 has one Valve plate 12, which is a combustion chamber 20 of the Flat valve closing surface 17 facing the internal combustion engine and a valve disk surface 14 facing away from the combustion chamber 20 Has.
- the valve plate surface 14 merges into one cylindrical stem 9 of the inlet valve 1 over, the an actuation end, not shown, outside the Cylinder head 3 ends.
- To actuate the inlet valve 1 engages in a known manner at the actuating end of the shaft 9 For example, a rocker arm that the inlet valve 1 in a Open and by means of a valve spring in a closed position brings back.
- the inlet valve 1 is in its drawing Shown closed position, in which an annular Section of the valve plate surface 14 on a for example conical valve seat 15 is present.
- the valve seat 15 is, for example, from a sleeve-shaped valve insert 16 formed, for example by means of a press fit in the cylinder head 3 is introduced.
- Valve disc surface 14 becomes a flow connection released, the one via the open inlet valve 1 Inlet duct 18 with the combustion chamber 20 of the internal combustion engine connects.
- the inlet channel 18 is, for example, via a sealing ring 11 connected to an intake pipe 22 of the internal combustion engine.
- the inlet valve 1 opens at the bottom directed movement of a displaceable in the combustion chamber 20 Piston, taking air through the intake pipe 22 from the environment is sucked in.
- the intake air is, for example, in the Intake pipe 22 fuel mixed to the next Combustion in the combustion chamber 20 is an ignitable fuel-air mixture to obtain.
- Fuel injector 24 provided on the intake manifold 22 is attached to the fuel in the form of a more or less bundled, for example conical Fuel jet 25 in the direction of the inlet valve 1 in the Suction pipe 22 and the inlet channel 18 to deliver. That in the Drawing only partially shown
- Fuel injector 24 is for fuel supply for example via a fuel distributor (a so-called fuel rail) on a fuel feed pump 26 connected that the fuel from a Fuel tank 27 promotes.
- the fuel discharged from the fuel injection valve 3 disintegrates downstream of the fuel injector 24 in finest fuel droplets, which are in the intake pipe 22 and mix in the inlet duct 18 with the flowing air so that the most homogeneous fuel-air mixture possible.
- the fuel-air mixture flows with the inlet valve open 1 in the combustion chamber 20, is ignited and burns there with the inlet valve closed 1.
- the Fuel injector 24 dispensed fuel Walls of the intake pipe 22, on walls of the inlet duct 18, on the inner walls of the combustion chamber 20 and in particular on Inlet valve 1 on the valve plate surface 14 prevented become.
- the inlet valve 1 has a stem 9, which is not solid according to the invention, but has a cavity 28 in its interior.
- the cavity 28 has an elongated shape and is, for example, by Except drilling from the shaft 9.
- the cavity 28 extends from a transition region 31 between valve plate surface 14 and shaft 9 in the direction a longitudinal valve axis 5 of the inlet valve 1 and ends in closed state of the inlet valve 1 in the Valve guide sleeve 7.
- the shaft 9 has at least one Inlet shaft opening 30, which is from an outer lateral surface 34 of the shaft 9 leads into the cavity 28.
- the Valve guide sleeve 7 also has an opening 36 which from an inner surface 37 to an outer surface 38 of the Valve guide sleeve 7 leads.
- the valve guide opening 36 is, for example, by drilling from the valve guide sleeve 7 excluded and extends, for example, across Longitudinal valve axis 5 of the intake valve 1. Die Valve guide opening 36 of the valve guide sleeve 7 is over a corresponding cylinder opening 40 in the cylinder head 3 connected to a pressure line 41.
- the pressure line 41 is with an electromagnetically actuated one, for example Two-way valve 44 connected.
- the two-way valve 44 is via a connection pressure line 42 to a compressed air tank 45 connected.
- the compressed air tank 45 is a Compressed air tank line 46 to one, for example Pump device 47 connected.
- the pump device 47 is for example in the form of a diaphragm driven air pump formed in which the in a crankcase Internal combustion engine by a piston due to its opening and closing Downward movements created pressure fluctuations for pumping a gaseous medium, in particular air become.
- the compressed air tank 45 can while running Internal combustion engine in certain operating areas from the Pump device 47 can be refilled with air to the Compressed air supply sufficient compressed air in the To provide compressed air tank 45.
- In the open position of the Two-way valve 44 is from the compressed air tank 45 provided pressure via the connection pressure line 42, the Pressure line 41 and via the cylinder opening 40 on the Valve guide opening 36 of the valve guide sleeve 7.
- Valve guide opening 36 is closer to the combustion chamber 20 than this is the case with the inlet shaft opening 30 of the shaft 9 is.
- at least one outlet opening 50 am Valve plate 12 is provided, for example, transverse to Valve longitudinal axis 5 excluded from the valve plate surface 14 is to provide fluid communication with the cavity 28 of the To produce shaft 9.
- Openings 30, 36 overflow compressed air from pressure vessel 45 the connection pressure line 42, the open two-way valve 44 in the pressure line 41 and over the Cylinder opening 40 in the valve guide opening 36 in the Cavity 28 and via the at least one outlet opening 50 out of the valve plate surface 14 again.
- a plurality of inlet shaft openings 30 on the periphery of the outer Shell surface 34 of the shaft 9 is provided, so that at a rotation of the inlet valve 1 a flow connection the valve guide opening 36 with at least one of the multiple inlet shaft openings 30 is present. It is also conceivable on the circumference of the outer surface 38 of the Valve guide sleeve 7 a plurality of valve guide openings 36 to be provided, for example with several, slot-shaped inlet shaft openings 30 correspond to always in the open position of the inlet valve 1 Flow connection from the compressed air tank 45 to To produce outlet opening 50 of the inlet valve 1. It is also possible that in the region of the valve guide opening 36 the inner surface 37 is formed with a circumferential groove which in the open position, the inlet shaft opening 30 in can cover any rotational position of the inlet valve 1.
- outlet openings 50 in the transition region 31 It is also possible to replace or in addition to the outlet openings 50 in the transition region 31 to provide further outlet openings 50, for example from the valve plate surface 14 or from the outer Shell surface 34 of the shaft 9, in particular near the Valve plates 12 are excluded.
- the arrangement of the Outlet openings 50 can also be made such that a A large number of outlet openings 50 are sieve-shaped Hole valve plate surface 14. The from the multitude of Compressed air outlet openings 50 creates one particularly even air film, which then the whole Valve plate surface 14 surrounds with the valve plate 12.
- valve plate surface 14 it is also possible to use the valve plate surface 14 to form a rough surface which the from a Outlet opening 50 or, for example, several Outlet openings 50 escaping compressed air on the rough Swirled surface so that an air flow around the Forms valve plate 12 around.
- the making of a rough surface of the valve plate surface 14 can for example by a sintering process in which a metal layer is applied to the valve plate surface 14 to create a rough surface.
- the outlet openings 50 and the rough surface of the Valve plate surface 14 it is also possible to use the inlet valve 1 to form two parts, one part for example the stem 9 and part of the valve plate 12, after the separate machining of shaft 9 and Valve plate 12 can be reassembled.
- the blowing out of the compressed air at the inlet valve 1 is especially during the cold start phase and the subsequent warm-up phase and in certain Operating areas of the internal combustion engine are provided.
- the time of the compressed air supply is dependent on the one hand selected distance of the at least one valve guide opening 36 to at least one inlet shaft opening 30 and on the other hand controllable by the two-way valve 44.
- the two-way valve 44 is for this purpose, for example, via an electrical Connection line 52 to an electronic control unit 53 connected that only in certain operating areas, especially in the cold start phase of the internal combustion engine, brings the two-way valve 44 into an open position Blow out compressed air from inlet valve 1.
- the Compressed air supply is particularly during the first 120 Provided seconds after starting the internal combustion engine.
- valve plate surface 14 of the valve plate 12 released compressed air also causes an improved Mixing that emitted by the fuel injector 24 Fuel, especially in the combustion chamber 20, takes place. This leads to an optimal combustion of the fuel in the Combustion chamber 20, which also increases fuel consumption Internal combustion engine reduced. Furthermore, the im Cavity 28 flowing out of the valve plate 12 escaping compressed air cooling the inlet valve 1, so that its thermal load, especially at full load the internal combustion engine, is reduced, which results in other increases the life of the inlet valve 1.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
Claims (10)
- Anordnung zur Zufuhr von unter Druck stehendem gasförmigen Medium, insbesondere Druckluft, zu einem Einlaßventil (1) für einen Brennraum (20) einer Brennkraftmaschine, wobei das Einlaßventil einen Schaft (9) und einen Ventilteller (12) mit einer dem Brennraum (20) abgewandten Seite aufweist, zu der das unter Druck stehende gasförmige Medium gelangt,
dadurch gekennzeichnet, daß
in dem Schaft (9) ein länglicher Hohlraum (28) ausgebildet ist, der zumindest eine Einlaßschaftöffnung (30) und zumindest eine Auslaßöffnung (50) aufweist, welche an der dem Brennraum (20) der Brennkraftmaschine abgewandten Seite des Einlaßventils vorgesehen ist, wobei das unter Druck stehende gasförmige Medium über die Einlaßschaftöffnung (30) in den Hohlraum einströmt und aus diesem über die Auslaßöffnung (50) ausströmt, so daß ein im wesentlichen den Ventilteller(12) umgebender Film entsteht, der eine Kondensation von Brennstoff am Ventilteller vermeidet. - Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß die zumindest eine Auslaßöffnung (50) in einem Übergangsbereich (31) zwischen Ventilteller (12) und Schaft (9) vorgesehen ist.
- Anordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die zumindest eine Auslaßöffnung (50) aus einer dem Brennraum (20) abgewandten Ventiltellerfläche (14) des Ventiltellers (12) ausgenommen ist.
- Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß die zumindest eine Auslaßöffnung (50) aus einer äußeren Mantelfläche (34) des Schaftes (9) ausgenommen ist.
- Anordnung nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß mehrere Auslaßöffnungen (50) vorgesehen sind, die sich radial vom Hohlraum (28) zum Ventilteller (12) erstrecken.
- Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß eine dem Brennraum (20) abgewandte Ventiltellerfläche (14) des Ventiltellers (12), über die das aus der zumindest einen Auslaßöffnung (50) austretende Medium strömt, rauh ausgebildet ist.
- Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß das Einlaßventil (1) aus zwei Teilen, dem Schaft (9) und dem Ventilteller (12), hergestellt ist.
- Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß zu der zumindest einen Einlaßschaftöffnung (30) eine Leitung (41, 42) führt, in welcher ein Zweiwege-Ventil (44) untergebracht ist, das die Zufuhr des unter Druck stehenden, gasförmigen Mediums unterbrechen kann.
- Anordnung nach Anspruch 1 oder 8, dadurch gekennzeichnet, daß ein elektronisches Steuergerät (53) vorgesehen ist, das die Zufuhr des unter Druck stehenden, gasförmigen Mediums derart steuert, daß nur bei bestimmten Betriebsbereichen, insbesondere in der Kaltstartphase der Brennkraftmaschine, eine Zufuhr des Mediums zu dem Einlaßventil (1) erfolgt.
- Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß das gasförmige Medium einem Druckluftbehälter (45) entstammt, dem eine Pumpvorrichtung (47) das Medium unter Druck zuführt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19504239A DE19504239A1 (de) | 1995-02-09 | 1995-02-09 | Einlaßventil für einen Brennraum einer Brennkraftmaschine |
DE19504239 | 1995-02-09 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0726385A1 EP0726385A1 (de) | 1996-08-14 |
EP0726385B1 true EP0726385B1 (de) | 1999-03-03 |
Family
ID=7753530
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95114166A Expired - Lifetime EP0726385B1 (de) | 1995-02-09 | 1995-09-09 | Anordnung zur Zufuhr von Druckmedium zu einem Einlassventil für einen Brennraum einer Brennkraftmaschine |
Country Status (4)
Country | Link |
---|---|
US (1) | US5617835A (de) |
EP (1) | EP0726385B1 (de) |
JP (1) | JPH08240107A (de) |
DE (2) | DE19504239A1 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE511835C2 (sv) * | 1996-05-02 | 1999-12-06 | Volvo Ab | Anordning och förfarande för tillförsel av tillskottsluft vid en förbränningsmotor |
NO306074B1 (no) * | 1997-08-27 | 1999-09-13 | Kvaerner Asa | Avgassventil for forbrenningsmotorer |
US20080041343A1 (en) * | 2006-07-06 | 2008-02-21 | Parish James R Jr | Fuel injection system with cross-flow nozzle for enhanced compressed natural gas jet spray |
US8327831B2 (en) | 2009-03-10 | 2012-12-11 | Sturman Digital Systems, Llc | Dual fuel compression ignition engines and methods |
US9523293B2 (en) * | 2013-09-19 | 2016-12-20 | Ford Global Technologies, Llc | Internal combustion engine and method for operating an internal combustion engine |
CN104405466A (zh) * | 2014-10-21 | 2015-03-11 | 大连理工大学 | 压缩空气发动机高压进气门 |
JP5985003B1 (ja) * | 2015-04-27 | 2016-09-06 | 三菱電機株式会社 | 内燃機関用吸気バルブ |
WO2017041835A1 (en) | 2015-09-09 | 2017-03-16 | Volvo Truck Corporation | Valve arrangement |
EP3387233B1 (de) * | 2015-12-07 | 2021-07-14 | Volvo Truck Corporation | Verbrennungsmotor |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1799397A (en) * | 1927-04-25 | 1931-04-07 | Taylor Cecil Hamelin | Internal-combustion engine |
JPS5999028A (ja) * | 1982-11-27 | 1984-06-07 | Hino Motors Ltd | タ−ボ過給機付きデイ−ゼル機関における不足空気の吹込み装置 |
JPS59158363A (ja) * | 1983-02-28 | 1984-09-07 | Hino Motors Ltd | 給排気ポ−トへの流体供給装置 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB191509667A (en) * | 1915-07-02 | 1916-05-11 | Herbert Lindley | Improvements in the Construction of Mushroom Valves particularly for Motor Cycle Engines. |
US2170267A (en) * | 1938-06-17 | 1939-08-22 | Rich Mfg Corp | Alloy steel |
US2819704A (en) * | 1955-12-09 | 1958-01-14 | Niederman Henry | Air cooled engine exhaust valves |
FR1401216A (fr) * | 1964-01-29 | 1965-06-04 | Union General De Minas | Dispositif améliorant le rendement des moteurs à combustion interne et nouvelles soupapes en permettant l'application |
FR89404E (fr) * | 1964-12-23 | 1967-06-23 | Inst Francais Du Petrole | Procédé permettant la combustion de mélanges pauvres dans les moteurs à allumage commandé |
DE2048228A1 (de) * | 1970-10-01 | 1972-04-06 | Volkswagenwerk Ag, 3180 Wolfsburg | Insbesondere luftgekühlte Brennkraftmaschine mit einer Einrichtung zur Abgasnachverbrennung |
SE400810B (sv) * | 1975-07-23 | 1978-04-10 | Nordstjernan Rederi Ab | Kylsystem for kylning av avgasventil for forbrenningsmotor |
US4313410A (en) * | 1978-04-15 | 1982-02-02 | Nissan Motor Company, Limited | Internal combustion engine with fuel injector |
DE3600067A1 (de) | 1986-01-03 | 1987-07-09 | Juergen Schaefler | Einlassventil und auslassventil, insbesondere fuer verbrennungsmotoren |
US4976248A (en) * | 1989-04-03 | 1990-12-11 | James Rowe | Apparatus for the generation of turbulence in internal combustion engines |
-
1995
- 1995-02-09 DE DE19504239A patent/DE19504239A1/de not_active Withdrawn
- 1995-09-09 EP EP95114166A patent/EP0726385B1/de not_active Expired - Lifetime
- 1995-09-09 DE DE59505201T patent/DE59505201D1/de not_active Expired - Fee Related
-
1996
- 1996-02-06 JP JP8020252A patent/JPH08240107A/ja active Pending
- 1996-02-07 US US08/597,769 patent/US5617835A/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1799397A (en) * | 1927-04-25 | 1931-04-07 | Taylor Cecil Hamelin | Internal-combustion engine |
JPS5999028A (ja) * | 1982-11-27 | 1984-06-07 | Hino Motors Ltd | タ−ボ過給機付きデイ−ゼル機関における不足空気の吹込み装置 |
JPS59158363A (ja) * | 1983-02-28 | 1984-09-07 | Hino Motors Ltd | 給排気ポ−トへの流体供給装置 |
Also Published As
Publication number | Publication date |
---|---|
DE59505201D1 (de) | 1999-04-08 |
DE19504239A1 (de) | 1996-08-14 |
EP0726385A1 (de) | 1996-08-14 |
JPH08240107A (ja) | 1996-09-17 |
US5617835A (en) | 1997-04-08 |
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