EP2558690A1 - Oil mist separator of a crankcase ventilation device of an internal combustion engine - Google Patents
Oil mist separator of a crankcase ventilation device of an internal combustion engineInfo
- Publication number
- EP2558690A1 EP2558690A1 EP11719207A EP11719207A EP2558690A1 EP 2558690 A1 EP2558690 A1 EP 2558690A1 EP 11719207 A EP11719207 A EP 11719207A EP 11719207 A EP11719207 A EP 11719207A EP 2558690 A1 EP2558690 A1 EP 2558690A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- oil
- separator
- crankcase
- valve body
- 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
- 239000003595 mist Substances 0.000 title claims abstract description 45
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 34
- 238000009423 ventilation Methods 0.000 title claims abstract description 13
- 238000007599 discharging Methods 0.000 claims abstract description 3
- 230000003134 recirculating effect Effects 0.000 claims abstract description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 230000000630 rising effect Effects 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 description 16
- 230000005484 gravity Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- 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
- F01M13/00—Crankcase ventilating or breathing
- F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
-
- 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
- F01M13/00—Crankcase ventilating or breathing
- F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
- F01M2013/0422—Separating oil and gas with a centrifuge device
-
- 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
- F01M13/00—Crankcase ventilating or breathing
- F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
- F01M2013/0438—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with a filter
-
- 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
- F01M13/00—Crankcase ventilating or breathing
- F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
- F01M2013/0488—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with oil trap in the return conduit to the crankcase
- F01M2013/0494—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with oil trap in the return conduit to the crankcase using check valves
Definitions
- Oil mist separator of a crankcase ventilation device of an internal combustion engine Oil mist separator of a crankcase ventilation device of an internal combustion engine
- the present invention relates to a ⁇ lnebelabscheider a crankcase ventilation device of an internal combustion engine, with a separator housing, with a raw gas from the crankcase of the internal combustion engine in a Rohgas Society the separator leading raw gas duct, with a clean gas from a clean gas region of the separator discharging clean gas duct and with a separated from the crankcase ventilation gas in oil the crankcase of the internal combustion engine recirculating oil return passage, in the course of which a valve is arranged, which opens the oil return passage falls below a predetermined pressure difference between the two sides of the valve.
- An oil mist separator having the features indicated above is known from US Pat. No. 6,907,869 B2.
- the arranged in the course of the oil return passage valve here is a check valve, which is preferably located near the crankcase of the internal combustion engine, ie from the oil mist separator, to open the valve by the pressure of the oil collected upstream of the valve against the pressure prevailing in the crankcase gas pressure and then drain the oil from the oil return passage in the crankcase of the engine.
- a condensate return passage leads parallel to the oil return passage to the crankcase of the internal combustion engine from the deepest in use position range of the raw gas channel, wherein the condensate return passage is performed without a valve or a siphon.
- a disadvantage is considered in this known oil mist that when an increase of oil from the crankcase forth in the oil return passage, which can happen at unfavorable pressure conditions, a disturbing entry of oil in the raw side of Olnebelabscheiders can not be safely excluded.
- One second disadvantage of this known Olnebelabscheiders is seen in that it requires in its design with condensate return from the Rohgaskanal two separate lines, namely a first line for the oil return passage and a second line for the condensate return passage from the separator housing to the crankcase. As a result, a high installation effort when connecting the Olnebelabscheiders is caused to the associated internal combustion engine.
- valve as a valve body has a floating body whose density is smaller than the density of oil and by a rising from the crankcase ago oil level in the oil return channel in his Closed position against a valve seat can be raised, and that the weight of the valve body and the dimensions of the valve body surrounding the valve channel are coordinated so that upon reaching a predetermined speed of a gas flow in the valve passage in the direction of the crankcase to the separator housing the valve body by the gas flow and on the gas pressure difference acting on the valve body in its closed position against the valve seat can be raised.
- the invention provides an oil mist separator whose valve combines two valve functions, namely the function of a float valve and the function of a check valve.
- the function of the float valve always comes into play when, due to unfavorable pressure conditions, oil is forced out of the crankcase of the internal combustion engine through the oil return channel upwards in the direction of the separator housing.
- the valve body As soon as the rising oil level reaches the valve body, it floats on the oil and is thereby brought into sealing contact with its valve seat, whereby the valve closes.
- oil from the crankcase at most to the valve, but not further, in particular not in the clean gas region of the separator get.
- the function of the non-return valve always comes into effect when the oil recirculation Gas flows from the crankcase towards the separator housing of the oil mist separator.
- valve Since only a single valve is required to achieve the two valve functions, advantageously only a correspondingly low parts and assembly effort is required. At the same time, due to its dual function, the valve ensures a particularly high operational reliability of the oil mist separator, which contributes to compliance with relevant emission limit values of the associated internal combustion engine.
- valve body is a hollow ball and that the valve channel surrounding the valve channel is round in cross-section and forms a radial annular gap with the valve body in its open position.
- valve body is functionally independent of position, which contributes significantly to reliable operation.
- this results in a symmetrical loading of the valve body when it is flowed by gas from the crankcase, which contributes to a safe operation of the valve as a check valve.
- valve in the oil return passage opens only in the presence of suitable pressure conditions, in particular when the associated internal combustion engine is at a standstill, an oil collecting space is expediently formed upstream of the valve in the separator housing.
- the volume of the oil collection chamber should be selected according to the requirements in order to ensure the absorption of a sufficient amount of oil for all conceivable operational situations.
- the invention proposes that a condensate return duct branches off from a deepest point of the crude gas duct in the operating position of the oil mist separator and that the condensate return duct opens into the oil return duct downstream of the first valve arranged in the oil return duct.
- the oil return channel is also used for the return of the condensate from the raw gas channel, so that a single line is sufficient as a combined oil and condensate return from Olnebelabscheider to the crankcase. This simplifies the connection of the Olnebelabscheiders to the associated internal combustion engine and reduces the number of necessary items.
- a second valve is arranged, which opens the condensate return duct falls below a predetermined pressure difference between the two sides of the second valve. This ensures that the condensate collected before the second valve is discharged into the crankcase only in the presence of suitable pressure conditions, in particular when the associated internal combustion engine is at a standstill. An undesirable, disturbing gas flow through the condensate return duct against the condensate flow direction is avoided by the second valve.
- the condensate return channel and the mouth of the condensate return channel in the oil return passage and possibly arranged in the condensate return passage second valve are integrated into the separator housing.
- the oil mist separator according to the present invention can be made variously and practically arbitrarily in terms of the means or mechanisms employed therein for separating oil mist from the crankcase ventilation gas.
- a rotatably drivable rotor is arranged as a separating element in the separator housing. Even with such an active separation element, effective separation of oil mist from the crankcase ventilation gas is ensured, and as a rule, a rotor advantageously has a longer life in comparison with a fiber or nonwoven body, or even a lifetime component of the precipitator which never has to be renewed.
- the separation element can be formed by at least one cyclone.
- the separator housing is made in one piece with the exception of a top, removable cover or composed of several interconnected, such as welded or glued or latched, items composed.
- a one-piece design is especially inexpensive injection-molded plastic.
- An embodiment of several, preferably as few as possible, individual parts is still inexpensive to manufacture and also allows such geometric designs that are not integrally represented.
- the removable cover allows easy replacement of a separator element during maintenance of the oil mist separator.
- FIG. 2 shows an enlarged detail of the oil mist separator according to FIG.
- Figure 3 shows the same section as Figure 2, in a second operating state, also in longitudinal section, and
- FIG. 1 shows in a partial longitudinal section a first oil mist separator 1 with a separator housing 10 and a separating element 11 arranged therein.
- the separation element 1 1 separates the interior of the oil mist separator 1 into a crude gas region 1 1.1 and a clean gas region 1 1 .2.
- the separation element 1 1 consists of a hollow cylindrical fiber or nonwoven body, which can be removed during a maintenance of the oil mist separator 1 from the separator housing 10 and replaced by a new separation element 1 1.
- the separator housing 10 is closed by a removable cover.
- the separator housing 10 comprises an upper housing part 10.1 only partially visible in FIG. 1, in which the separation element 11 is arranged and fixed. Downwards closes to the upper housing part 10.1 a lower housing part 10.2 which, to the side, in FIG. 1 to the left, merges into a neck part 10. 3, which contains a raw-gas channel 12.
- the nozzle part 10.3 is designed here as a hose connection piece, to which a crankcase ventilation gas supplying hose can be connected.
- a return duct part 10.5 can finally be seen, which is connected, for example welded, to the lower housing part 10.2 from below.
- the return duct part 10.5 contains an oil return duct 14 and a condensate return duct 15 opening into the oil return duct 14.
- the oil return duct 14 merges into a connecting stub 19, to which an oil and condensate can be connected to the oil pan or the crankcase of the associated internal combustion engine ,
- an oil collecting channel 10.4 Radially outside of the separation element 1 1 is located in the separator housing 10, an oil collecting channel 10.4, which is connected via at least one not visible in Figure 1 connection opening with a right in the housing lower part 10.2 provided Olsammelraum 16.
- the Olsammelraum 16 goes down into an oil return passage 14, in the course of which a valve 2 is arranged.
- this crankcase ventilation gas supplied by the raw gas duct 12 from the crankcase of an associated internal combustion engine is supplied with oil mist, which initially passes into the crude gas region 11 located in the interior of the separation element 11. From there, the gas flows through the separating element 1 1 in the radial direction from the inside to the outside and enters as a cleared of oil mist clean gas in the clean gas region 1 1 .2 radially outside of the separator 1 1 a. From there, the clean gas is discharged via a clean gas channel not visible in the drawing, usually in the intake tract of the internal combustion engine. The separated in the separation element 1 1 from the gas flow oil passes under gravity within the separation element 1 1 down and passes from the separation element 1 1 in the oil collecting channel 10.4 over.
- valve 2 Under two conditions, namely a) when there is a gas pressure difference between the two sides of the valve 2, which is able to lift the designed as a hollow ball, correspondingly lightweight valve body 20 and into contact with the valve seat 21st or b) when oil in the oil return passage 14 from the crankcase of the associated internal combustion engine rises up to the valve 2 and the hollow ball forming the valve body 20 floats on the oil and is brought into abutment with the valve seat 21.
- the valve 2 thus combines in itself the functions of a check valve and a float valve.
- the valve 3 in the condensate return channel 15 is designed here as a mushroom valve with a valve body made of an elastomer.
- the valve 3 is also in its closed position during operation of the associated internal combustion engine, so that condensate already precipitated in the raw gas duct 12 collects in the condensate collecting chamber 17 upstream of the condensate return duct 15 and the valve 3.
- Figure 2 shows an enlarged sectional view, also in longitudinal section, the two valves 2 and 3 in their closed state.
- the valve body 20 of the first valve 2 is formed by a hollow ball, so it has a low weight.
- the weight of the valve body 20 and the extent of the valve body 20 receiving valve channel 22 are coordinated so that at a certain, specifiable speed overflowing gas flow through the oil return passage 14 in the direction of the crankcase to ⁇ lnebelabscheider, so according to the drawing from the bottom up, the gas flow and the pressure difference acting on the valve body 20 exert on the valve body 20 a force sufficient to lift the valve body 20 and bring it into the sealing seat shown in Figure 2 to the valve seat 21.
- the hollow ball forming the valve body 20 is lighter than oil, so that it floats on an optionally rising through the oil return passage 14 oil level and in the figure 2 shown closed position, in which the valve body 20 abuts the associated sealing seat 21.
- the second valve 3 is also in the closed position in Figure 2.
- the mushroom-shaped valve body 30 covers two valve channels 32, which connect the Kondensatsammeiraum 17 with the condensate return passage 15. If suitable pressure conditions are present, in particular if at standstill of the internal combustion engine on both sides of the valve 3, an equal pressure, in particular atmospheric pressure, is present, the weight of accumulated in Kondensatsammeiraum 17 condensate in a position to deform the valve body 30 so that a condensate drain through the valve channels 32 is allowed past the valve body 30.
- the valve body 30 is an elastomeric body having a predetermined flexibility, elasticity and self-restoring force. For ease of assembly of the valve body 30 is in a valve channels 32 having wall within the housing base 10.2 locked. Instead of the mushroom valve, for example, a leaf or tongue valve can be used.
- FIG. 3 shows in the same representation as the figure 2 the same section of the oil mist with the two valves 2 and 3, now the valve 2 is in its open position.
- the valve body 20 In this open position, the valve body 20 is within the valve channel 22 downwardly away from the valve seat 21 and there is an annular gap 23 between the outer periphery of the valve body 20 and the inner circumference of the valve channel 22 free, through which an outflow of the oil collection chamber 16 collected Gravity down oil into the oil return passage 14 is made possible.
- the valve body 20 In its open position shown in Figure 3, the valve body 20 is held by a not quantified stop, so that a further movement of the valve body 20 down is not possible.
- valve 3 is again shown in Figure 3 in its closed position, which assumes the valve body 30 of the valve 3 due to its own restoring force as soon as the condensate has flowed out of the Kondensatsammeiraum 17 through the valve channels 32 and the valve body 30 relieved of the weight of the condensate is.
- the mouth 18 of the condensate return duct 15 lies in the oil return duct 14 immediately downstream of the valve 2, thereby combining, as early as possible, the flows of the oil to be returned and the condensate to be returned.
- the return channels 14 and 15 are formed in the return channel part 10.5, which is connected from below with the lower housing part 10.2, preferably welded, is.
- the upper housing part 10.1, the lower housing part 10.2 and that return duct part 10.5 are in the example shown, the ⁇ lnebelabscheiders 1 each one-piece injection molded parts made of plastic or die castings made of light metal, which allows cost-effective mass production.
- FIG. 4 shows, in a partial longitudinal section, a second oil mist separator 1, likewise with a separator housing 10 and a separator chamber 10 arranged therein.
- element 1 1 the separating element 11 consists of a rotatably mounted rotor which can be driven in a manner known per se and which forms a disk stack separator.
- the separator element 1 1 in the form of the rotor is here as a rule a lifetime component of the oil mist separator 1 and must at most be removed from the separator housing 10 in the event of unexpected damage and replaced by a new separator element 11, ie by a new rotor become.
- the separator housing 10 is closed by a removable cover.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010027783A DE102010027783A1 (en) | 2010-04-15 | 2010-04-15 | Oil mist separator of a crankcase ventilation device of an internal combustion engine |
PCT/EP2011/055782 WO2011141258A1 (en) | 2010-04-15 | 2011-04-13 | Oil mist separator of a crankcase ventilation device of an internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2558690A1 true EP2558690A1 (en) | 2013-02-20 |
EP2558690B1 EP2558690B1 (en) | 2015-10-28 |
Family
ID=44310942
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11719207.0A Active EP2558690B1 (en) | 2010-04-15 | 2011-04-13 | Oil mist separator of a crankcase ventilation device of an internal combustion engine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2558690B1 (en) |
DE (1) | DE102010027783A1 (en) |
WO (1) | WO2011141258A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11149601B2 (en) | 2016-05-27 | 2021-10-19 | 3Nine Ab | Oil separator having first and second gas inlets and gas outlets |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010062321B4 (en) * | 2010-12-02 | 2023-10-12 | Elringklinger Ag | Oil separator unit |
DE102014220811B4 (en) | 2014-10-14 | 2023-02-16 | Elringklinger Ag | drainage device |
DE102017201896B4 (en) | 2017-02-07 | 2022-10-20 | Mahle International Gmbh | Method for venting a crankcase of an internal combustion engine and associated device |
CN108301935B (en) * | 2018-03-28 | 2024-02-20 | 潍柴动力股份有限公司 | Oil-gas separator shell and diesel vehicle |
DE102019004377A1 (en) | 2019-06-19 | 2020-12-24 | Deutz Aktiengesellschaft | Oil return valve for a crankcase ventilation system |
CH717661A1 (en) * | 2020-07-15 | 2022-01-31 | Liebherr Machines Bulle Sa | Aerosol separator for separating aerosols in a blow-by gas. |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3707271C1 (en) * | 1987-03-06 | 1988-05-19 | Mannesmann Kienzle Gmbh | Valve arrangement for a gas separator |
JPH0988542A (en) * | 1995-09-19 | 1997-03-31 | Kubota Corp | Blowby gas processing device for engine |
CA2410644C (en) * | 2000-05-24 | 2009-05-05 | Parker-Hannifin Corporation | Safety shut-off valve for crankcase emission control system |
EP1394372B1 (en) * | 2002-08-22 | 2007-04-11 | Perkins Engines Company Limited | Combined shut-off valve and cover for an engine breather system |
US6907869B2 (en) | 2003-01-17 | 2005-06-21 | Parker-Hannifin Corporation | Filter element and assembly with continuous drain |
DE102006018783A1 (en) * | 2005-04-22 | 2007-02-08 | Mann + Hummel Gmbh | Valve in crankcase venting system, used to return intercepted oil to sump, is associated with float assuring reliable closure under unfavorable differential pressure conditions |
FR2910051A3 (en) * | 2006-12-14 | 2008-06-20 | Renault Sas | Decanting oil evacuating device for internal combustion engine, has cannula whose outlet cooperates with ball, to permit flow of oil and prevent flow of oil and gas, during normal functioning and malfunctioning, respectively |
DE202007011585U1 (en) * | 2007-08-17 | 2007-10-18 | Dichtungstechnik G. Bruss Gmbh & Co. Kg | Oil return valve for crankcase ventilation |
DE202008002928U1 (en) * | 2008-02-29 | 2009-07-09 | Mann+Hummel Gmbh | Liquid separator with non-return valve, especially for cleaning crankcase gases |
FR2932843B1 (en) * | 2008-06-24 | 2010-08-20 | Mann & Hummel Gmbh | OIL PURGING DEVICE FOR MOTOR ENGINE OIL IN PARTICULAR MOTOR VEHICLE MOTOR AND METHOD OF MANUFACTURING SUCH A DEVICE. |
-
2010
- 2010-04-15 DE DE102010027783A patent/DE102010027783A1/en not_active Withdrawn
-
2011
- 2011-04-13 WO PCT/EP2011/055782 patent/WO2011141258A1/en active Application Filing
- 2011-04-13 EP EP11719207.0A patent/EP2558690B1/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2011141258A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11149601B2 (en) | 2016-05-27 | 2021-10-19 | 3Nine Ab | Oil separator having first and second gas inlets and gas outlets |
Also Published As
Publication number | Publication date |
---|---|
DE102010027783A1 (en) | 2011-10-20 |
WO2011141258A1 (en) | 2011-11-17 |
EP2558690B1 (en) | 2015-10-28 |
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