EP2870329A1 - Deckel mit ölspeicherfunktionalität für ein gehäuse eines elektrohydraulischen ventiltriebes eines verbrennungsmotors - Google Patents
Deckel mit ölspeicherfunktionalität für ein gehäuse eines elektrohydraulischen ventiltriebes eines verbrennungsmotorsInfo
- Publication number
- EP2870329A1 EP2870329A1 EP13732949.6A EP13732949A EP2870329A1 EP 2870329 A1 EP2870329 A1 EP 2870329A1 EP 13732949 A EP13732949 A EP 13732949A EP 2870329 A1 EP2870329 A1 EP 2870329A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- oil storage
- lid
- cover
- storage cavity
- housing
- 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
- 238000003860 storage Methods 0.000 title claims abstract description 52
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000005476 soldering Methods 0.000 claims description 5
- 238000004049 embossing Methods 0.000 claims description 4
- 238000009423 ventilation Methods 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 2
- 230000035515 penetration Effects 0.000 claims 1
- 238000005304 joining Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000011324 bead Substances 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- 238000007789 sealing Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003856 thermoforming Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/26—Making machine elements housings or supporting parts, e.g. axle housings, engine mountings
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
- F01M9/10—Lubrication of valve gear or auxiliaries
- F01M9/106—Oil reservoirs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases
- F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/49297—Seal or packing making
Definitions
- the invention relates to a cover for a housing of an electro-hydraulic valve train of an internal combustion engine with integrated ⁇ l umanfunktionali- act according to the preamble of claim 1.
- Electrohydraulic valve trains have been known for some time and are described, for example, in EP 0 446 065 A2, DE 3 834 882 A1 and EP 0 317 364 A1.
- Another electrohydraulic valve train is the UniAir principle developed by FIAT, as is known, for example, from EP 0 803 642 A1.
- MultiAir is a further development of the UniAir system. It takes over the valve control on the intake side and thus makes the corresponding camshaft superfluous. Each cylinder has its own hydraulic system with a separate hydraulic chamber. An additional cam on the exhaust camshaft transfers the valve clearance mechanically to the Muti-Air system. If the electronically controlled solenoid valve on the hydraulic chamber is closed, no oil flow is possible and the hydraulic chamber behaves like a rigid component. In this case, the valve clearance is comparable to a conventional system. If, however, the solenoid valve is open at the hydraulic chamber, cams and valves are mechanically separated from each other. The intake valves no longer follow the rhythm of the cams but close by spring force.
- a sophisticated mechatronics via solenoid valves controls the intake valves tailored to the specific driving situation.
- the air supply in the cylinder is optimally adapted to the actual requirements, which in particular in the partial load range Efficiency of the internal combustion engine sustainably increases.
- a control unit manages the complex mechatronics, whereby the valve position is adjusted in fractions of a second by the interaction of mechanics and electronics. All these electro-hydraulic systems have in common that as possible no air may enter the high-pressure chamber of the hydraulic system. Furthermore, an oil reservoir is required to meet predetermined downtime and startup procedures can.
- the oil reservoir is designed as a one-piece hood with deep-drawn oil storage cavities, which is screwed onto the cover of the motor housing and sealed with a bead seal against the lid.
- the lid is sealed to the MultiAir housing with a screen seal and bolted to the housing.
- the voluminous design of the OI reservoir on the hood in a one-piece hood is not or hardly possible.
- the manufacturing and assembly costs are relatively high.
- the object of the invention can be seen in simplifying the oil reservoir of an electro-hydraulic valve drive in its production and to optimize the volume design.
- the object is achieved by a cover for a housing of an electro-hydraulic valve drive with the features of claim 1.
- a housing of an electrohydraulic valve drive of an internal combustion engine hereinafter referred to as MultiAir housing, is closed by a cover, on which according to the invention an oil reservoir cavity per cylinder of the internal combustion engine is directly connected.
- the cover thereby closes off the medium-pressure space of the housing of the valve drive and has a diaphragm opening to the oil reservoir, through which air can escape during operation of the engine.
- oil is constantly transported into the oil reservoir, which is almost always filled in the operating condition with oil.
- oil may flow back out of the oil reservoir through the orifice into the medium pressure space due to gravity.
- each engine type and space in the engine compartment in a simple way, the volume of the oil storage cavities can be varied even for individual cylinders.
- the oil storage cavities can be adapted in their shape and in their volume to the available space and make maximum use of it. In this case, it is advisable to carry out this as a common part in the case of several oil storage cavities per cover in order to be able to produce appropriate quantities. Due to the separation, the possible degree of deformation is increased, which benefits the shaping and the possible size (volume) of the oil storage cavities.
- the lid and the oil storage cavity are made of sheet steel and soldered together.
- the lid and the openings required are punched out of a steel sheet.
- the oil storage cavities are preferably produced by deep-drawing a steel strip, then trimmed at the federal government and brought to the required evenness by means of a flat lay.
- the joining of the cavities on the lid for example, by means of soldering in a continuous furnace.
- Other joining technologies, such as laser welding, Piasmatronsch Denen or the like are also possible, as long as the flatness of the lid during the joining process is largely retained or only a minimal distortion of the lid takes place.
- the flatness of the cover is defined for certain sealing concepts towards the housing (eg by means of a bead seal) and must be adhered to accordingly.
- the lid and / or the oil storage cavities from a plastic or another material which satisfies the technical requirements and to add it accordingly.
- the person skilled in the art can select the suitable manufacturing and joining method (eg thermoforming, gluing, ultrasonic welding or others).
- the lid can in a conventional manner retaining lugs z. Ex. As a transport backup for drag lever have.
- the lid in the region of the oil storage cavity on a recess at the lowest point of the aperture is provided.
- the depression can be produced, for example, by embossing the lid and is preferably funnel-shaped or funnel-shaped. This embodiment offers the advantage that, even in the case of unfavorable system positions (for example, tilting of the motor vehicle), the entire volume of the oil storage cavity can flow back into the medium-pressure space of the MultiAir housing.
- the oil storage cavity has a vent hole at its top. This can be introduced into the material before or after the shaping of the cavity.
- a particularly advantageous embodiment in which the cover and oil storage cavity consist of steel can be produced by the following method steps: - punching the lid of a steel sheet;
- FIG. 1 shows a first preferred embodiment of a lid for a housing of an electrohydraulic valve drive of a 4-cylinder engine in a three-dimensional representation
- FIG. 2 shows the lid shown in FIG. 1 in a plan view
- FIG. 3 shows the lid shown in Figure 1 in a sectional view along the section line AA in Fig. 2.
- FIG. 4 shows the cover shown in FIG. 1 in a sectional view along the section line BB in FIG. 2;
- FIG. 5 shows a second preferred embodiment of a cover according to the invention with a depression in a longitudinal section.
- FIG. 1 shows a three-dimensional view of a lid 01 for an electrohydraulic valve train of a 4-cylinder engine.
- FIG. 2 is a plan view of the lid of FIG. 1.
- FIG. 1 On the basis of these two figures, a first preferred embodiment of the invention will be explained below.
- each cylinder of the engine is associated with one of the oil storage cavities 02 and arranged on the cover 01 so that it is above a medium-pressure space of a solenoid valve device of the valve train when the cover 01 closes the MultiAir housing, not shown.
- a seal is preferably provided between MultiAir housing and cover 01, which may be, for example, a screen-printed seal, bead seal or other suitable seal.
- a single oil storage cavity is shown prior to connection to the lid 01. It can be seen that on the lid 01 enforces 03 are impressed, which serve to position the oil storage cavity 02 before the final joining with the cover 01 and fix it.
- Two apertures 04 are inserted into the cover 01 in the region of the oil storage cavity 02.
- the apertures 04 are used in the operation of the engine, the ventilation of the medium-pressure chamber of the MuliAir housing, not shown, and when the engine is stopped, they allow a backflow of the oil from the ⁇ l Eatkavmaschine 02 in the MultiAir housing.
- the number of apertures may vary.
- the cover 01 has, in a manner known per se, retaining lugs 06, which serve as transport safeguards for drag levers for actuating a pump of the electric-hydraulic valve drive through the cam.
- the oil storage cavities 02 each have on their upper side a vent opening 07.
- the lid 01 has a plurality of bores 08, which serve to fasten the lid on the MultiAir housing, preferably by screws.
- Fig. 3 shows a section along the section line A-A in Fig. 2; 4 shows a section along the section line B-B in FIG. 2.
- the oil storage cavity 02 is initially positioned above the lid 01 so that the apertures 04 and the openings 03 are located below the base of the oil storage cavity 02. Then, the first pretreated to a collar 1 1 with solder paste or the like ⁇ l umankavtician 02 is placed on the lid 01, as indicated by the arrow 12. The oil storage cavity 02 is held in position until final joining by a solder 13 by means of the passages 03. The joining process itself can be done by soldering in a continuous furnace.
- Fig. 5 shows a modified embodiment of the invention, in which a recess 14, for example, was produced by embossing in the lid 01 in the region of the oil storage cavity 02.
- the recess 14 is preferably funnel-shaped. At the lowest point of the recess 14, the at least one vent plate 06 is arranged. This ensures that even in unfavorable positions of the engine almost all the oil from the oil storage cavity 02 can automatically run back into the housing. LIST OF REFERENCE NUMBERS
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Valve Device For Special Equipments (AREA)
- Grain Derivatives (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012211458A DE102012211458B3 (de) | 2012-07-03 | 2012-07-03 | Deckel mit Ölspeicherfunktionalität für ein Gehäuse eines elektrohydraulischen Ventiltriebes eines Verbrennungsmotors |
| PCT/EP2013/063841 WO2014005999A1 (de) | 2012-07-03 | 2013-07-01 | Deckel mit ölspeicherfunktionalität für ein gehäuse eines elektrohydraulischen ventiltriebes eines verbrennungsmotors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2870329A1 true EP2870329A1 (de) | 2015-05-13 |
| EP2870329B1 EP2870329B1 (de) | 2016-05-25 |
Family
ID=48741149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13732949.6A Not-in-force EP2870329B1 (de) | 2012-07-03 | 2013-07-01 | Deckel mit ölspeicherfunktionalität für ein gehäuse eines elektrohydraulischen ventiltriebes eines verbrennungsmotors |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20150184559A1 (de) |
| EP (1) | EP2870329B1 (de) |
| CN (1) | CN104411926A (de) |
| DE (1) | DE102012211458B3 (de) |
| WO (1) | WO2014005999A1 (de) |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1699658A (en) * | 1926-11-15 | 1929-01-22 | John T Fagan | Combination oil reservoir, rocker arm, and main-support overhead-stamped bearing shaft |
| US2881863A (en) * | 1956-01-19 | 1959-04-14 | Stanford A Fulton | Apparatus for oiling over-head valves of engine |
| DE3520876C1 (de) * | 1985-06-11 | 1986-09-04 | Peter Hufnagel GmbH, 8500 Nürnberg | Vorrichtung zum Zuführen von Schmieröl zu den Reibstellen einer Nockenwelle |
| DE3710078C1 (de) * | 1987-03-27 | 1988-02-25 | Bayerische Motoren Werke Ag | Zylinderkopf fuer eine Brennkraftmaschine |
| JPH01253515A (ja) * | 1987-11-19 | 1989-10-09 | Honda Motor Co Ltd | 内燃機関の動弁装置 |
| DE3803064C2 (de) * | 1988-01-29 | 1995-04-20 | Preussag Stahl Ag | Kaltgewalztes Blech oder Band und Verfahren zu seiner Herstellung |
| US4887562A (en) * | 1988-09-28 | 1989-12-19 | Siemens-Bendix Automotive Electronics L.P. | Modular, self-contained hydraulic valve timing systems for internal combustion engines |
| DE3834882A1 (de) * | 1988-10-13 | 1990-04-19 | Bosch Gmbh Robert | Ventilsteuervorrichtung fuer brennkraftmaschinen |
| JPH03260344A (ja) * | 1990-03-08 | 1991-11-20 | Honda Motor Co Ltd | 内燃エンジンの制御方法 |
| CZ289693B6 (cs) * | 1994-04-11 | 2002-03-13 | Scambia Industrial Developments | Katalyzátor na katalytické oąetření výfukových plynů |
| IT1285853B1 (it) * | 1996-04-24 | 1998-06-24 | Fiat Ricerche | Motore a combustione interna con valvole ad azionamento variabile. |
| DE19927400A1 (de) * | 1998-06-24 | 1999-12-30 | Luk Fahrzeug Hydraulik | Hydraulische Fördereinrichtung |
| US5988129A (en) * | 1998-09-21 | 1999-11-23 | General Motors Corporation | Engine lubrication system |
| DE19952752A1 (de) * | 1999-11-02 | 2001-05-03 | Harting Automotive Gmbh & Co | Kontakt für Leiterfolien |
| WO2002020211A1 (de) * | 2000-09-07 | 2002-03-14 | Infineon Techonologies Ag | Lötmittel zur verwendung bei diffusionslötprozessen sowie verfahren zur herstellung von lötverbindungen unter verwendung des lötmittels |
| DE102005022415A1 (de) * | 2005-05-14 | 2006-11-23 | Bayerische Motoren Werke Ag | Zylinderkopf für eine Brennkraftmaschine |
| US7441533B1 (en) * | 2007-05-07 | 2008-10-28 | Gm Global Technology Operations, Inc. | Cover assembly for an internal combustion engine |
| JP2009221981A (ja) * | 2008-03-17 | 2009-10-01 | Toyota Motor Corp | アクチュエータ |
| JP5088240B2 (ja) * | 2008-06-04 | 2012-12-05 | 日産自動車株式会社 | エンジンの動弁機構 |
| US8418480B2 (en) * | 2008-12-18 | 2013-04-16 | Waters Technologies Corporation | Cooling system using positive displacement cryogenic liquid pump |
-
2012
- 2012-07-03 DE DE102012211458A patent/DE102012211458B3/de not_active Expired - Fee Related
-
2013
- 2013-07-01 US US14/412,758 patent/US20150184559A1/en not_active Abandoned
- 2013-07-01 CN CN201380034896.9A patent/CN104411926A/zh active Pending
- 2013-07-01 WO PCT/EP2013/063841 patent/WO2014005999A1/de not_active Ceased
- 2013-07-01 EP EP13732949.6A patent/EP2870329B1/de not_active Not-in-force
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2014005999A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014005999A1 (de) | 2014-01-09 |
| CN104411926A (zh) | 2015-03-11 |
| US20150184559A1 (en) | 2015-07-02 |
| DE102012211458B3 (de) | 2013-11-21 |
| EP2870329B1 (de) | 2016-05-25 |
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