WO2017145072A1 - Separator device for blow-by gases - Google Patents
Separator device for blow-by gases Download PDFInfo
- Publication number
- WO2017145072A1 WO2017145072A1 PCT/IB2017/051014 IB2017051014W WO2017145072A1 WO 2017145072 A1 WO2017145072 A1 WO 2017145072A1 IB 2017051014 W IB2017051014 W IB 2017051014W WO 2017145072 A1 WO2017145072 A1 WO 2017145072A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- separator device
- deviation
- filtering unit
- filtering
- separator
- Prior art date
Links
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
Definitions
- the present invention relates to a separator device for blow-by gases, i.e. the oil vapors vented from the crankcase of internal combustion engines during their functioning; typically, such gases thus consist of air and suspended particles, comprising oil droplets and/or soot (from the internal combustion engine) .
- the present invention further relates to a separator assembly for blow-by gases comprising such separator device and an engine group comprising an internal combustion engine and such blow-by gas separator assembly.
- separation assembly solutions connectible to the crankcase and suitable to vent the blow-by gases therefrom are known.
- solutions of assemblies which filter the blow-by gas and then recirculate it towards the engine and/or towards the engine exhaust are known.
- such separation assemblies are fluidically connected to the air intake circuit, e.g. downstream of the main filter suitable to treat the combustion air or, if envisaged, upstream of the compressor.
- the blow-by gas it is very important for the blow-by gas to be effectively filtered before being circulated, i.e. for the air to be effectively separated from the suspended particles to avoid the formation of amorphous coatings which typically cause damage to the engine valves and/or to the parts which form the turbocharger.
- centrifugal separator assemblies which have moving, in particular rotating, filtering devices, so that such rotation causes the separation between air and suspended particles.
- FIG. 1 shows a diagrammatic section view of a separator assembly according to a preferred embodiment which comprises a filtering device
- FIG. 1 shows a perspective view of a separator device of the present invention according to a first preferred embodiment
- FIG. 2b and 2c show a cross section and a front view of the separator device shown in the figure 2a, respectively;
- FIG. 3a shows a perspective view of a separator device of the present invention according to a second preferred embodiment
- FIG. 3b and 3c show a cross section and a front view of the separator device shown in the figure 3a, respectively;
- FIG. 4a shows a perspective view of a separator device of the present invention according to a third preferred embodiment
- FIG. 4b and 4c show a cross section and a front view of the separator device shown in the figure 4a, respectively;
- FIG. 5 and 6 show two further embodiments of the separator device in section view, respectively.
- reference numeral 500 indicates as a whole a separator assembly for blow-by gases, suitable to separate the air from the suspended particles, fluidically connected to the crankcase of an internal combustion engine.
- the separator assembly 500 is installable in an appropriately shaped housing.
- the separator assembly 500 comprises a casing 501, which identifies a separation chamber 510 within having an inlet mouth 511 of the blow-by gases and an outlet mouth 512 of the filtered gases. Furthermore, the separator assembly 500 includes a draining opening (not shown) arranged on the bottom of the casing 501, that means on the bottom of the separation chamber 510, suitable to allow the return of separator oil towards the crankcase.
- the separator assembly 500 extends along a main development axis, which preferably coincides with the axis X-X (described below) , so that the inlet mouth 511 is placed on a side wall of the casing 501 and the outlet mouth 512 is preferably placed on a front or rear wall of the casing 501 perpendicular to the development axis, and thus perpendicular to the development axis X-X.
- the separator assembly 500 comprises a separator device 1, which is in turn the object of the present invention.
- said separator device 1 is suitable to be housed in said separation chamber 510, in which it is suitable to perform the blow-by gas separation or filtering action.
- the separator device 1 is suitable to be moved in rotation along an axis X-X; indeed, the separator device 1 is preferably suitable to be operatively connected to movement means such to guide its rotary movement.
- the separator device 1 is movable in rotation by a specific motor, e.g. an electrical motor, or is operatively connectable to the respective internal combustion engine, e.g. to its camshaft.
- the separator device 1 comprises a rotating shaft 4 which is engageable by said moving means for controlling the rotation of the separator device 1 about the axis X-X.
- the filtering device 1 substantially comprises two main components: a filtering unit 2, suitable to filter the air, and a deviation unit 3, suitable to perform a specific action on the intake air.
- the rotating shaft 4 is operatively connected both to the filtering unit 2 and to the deviation unit 3 to guide them in rotation; in a preferred embodiment, the rotating shaft 4 is indeed co- molded with the deviation unit 3.
- the action of the separator device 1 on the blow-by gas filtering is thus as a function of the operating variables of the separator device 1 as a whole, such as its rotation speed, but also of the specific components, such as, for example the permeability of the filtering unit 2 or the particular geometry of the deviation unit 3.
- the filtering unit 2 extends hollow along said axis X-X and is radially traversable by the blow-by gases being permeable to air while the suspended particles are blocked; preferably, the filtering unit 2 allows the filtering of the blow-by gases radially from the outside inwards.
- said filtering unit 2 is of the ring type, identifying a central cavity 20, and performs the filtering action radially.
- the diversion unit 3 extends, in turn, along axis X-X and surrounds the filtering unit 2.
- the deviation unit 3 is suitable to delimit therein a housing 32 in which the filtering unit 2 is housable.
- the diversion unit 3 is bell-shaped, comprising a bottom wall 300 on which the filtering unit 2 rests and a side wall 310 which surrounds it.
- the deviation unit 3 also comprises a cap 301 suitable to close the housing 32.
- the filtering device 3 has a cage-like structure suitable to contain the filtering unit 2.
- the deviation unit 3 comprises a plurality of diverting elements 31 arranged circumferentially with respect to the filtering unit 2 and mutually and angularly separated, e.g. obtained on said side wall 310.
- each deviation element 31 extends in length in a distal direction starting from the filtering unit 2.
- the deviation unit 3, in particular its deviation elements 31, extends in length from the filtering unit 2, to a region circumferential thereto .
- each deviation element 31 extends along the axis X-X by a length substantially equal to the thickness of the filtering unit 2.
- the deviation unit 3 is substantially a radial impeller, in which the deviation elements 31 act as radial blades.
- the deviation unit 3 is thus suitable to perform a specific action on the intake blow-by gases via the filtering unit 2.
- the action performed by the deviation unit 3 is as a function of the number, of the arrangement and of the shape of the deviation elements 31.
- each deviation element 31 radially extends in length from the filtering unit 2 (as shown by way of example in figures 2a, 2b and 2c) .
- each deviation element has a length comprised between 2 and 25 mm, for example.
- the deviation unit 3 is suitable to perform an action on the blow-by gas, in a direction tangential to the filtering unit 2; in other words, such action creates a vortex effect about the filtering unit 2. So, such action creates a boundary layer and a higher centrifugal force than the centrifugal force experienced by the gas in a configuration of the separator device without any deviation unit, so that the separator device 1 displays a greater separation efficiency .
- the filtering unit 2 of the type comprising a folded filtering medium or a porous depth septum.
- each deviation element 31 is tilted with respect to a radial direction by a positive angle a.
- each deviation element 31 is tilted in the same direction as that of rotation of the separator device 1.
- a first example of such embodiment is shown in figures 3a, 3b and 3c.
- a second example of such embodiment is shown in figures 4a, 4b and 4c.
- each deviation element 31 has a substantially convex or substantially concave curvilinear pattern .
- the deviation unit 3 is suitable to perform an action on the blow-by gas, in a tilted direction towards the filtering unit 2; in other words, such action pushes the blow-by gas towards the filtering unit 2. So, such action creates an increase of the flow of blow-by gas through the filtering unit 2, thus determining an increase of crossing speed of the air through the filtering unit 2.
- the filtering unit 2 is of the high filtering efficiency type, for example of the pleated filter type, closed in the shape of a star or a porous depth septum consisting of fibrous synthetic material .
- the increase of gas speed makes it possible to use a more efficient and/or less permeable filtering unit 2 without altering the total differential pressure which is measureable straddling the separator device 1 with respect to the embodiments of the prior art without deviation elements 31, or the embodiment described above of the deviation device 3 with radial deviation elements 31, in which a clear variation of flow crossing the filtering unit 2 or of the crossing speed of the filtering unit 2 is not determined.
- the filtering unit 2 is suitable to prevent the passage of smaller sized suspended particles, considerably increasing the efficiency of the separator device 1.
- each deviation element 31 is tilted with respect to a radial direction by a negative angle ⁇ .
- each deviation element 31 is tilted in the opposite direction with respect to the sense of rotation of the separator device 1.
- each deviation element 31 has a substantially convex or substantially concave curvilinear pattern .
- the deviation unit 3 is suitable to perform an action on the blow-by gas, in a tilted direction away from the filtering unit 2; in other words, such action pushes the blow-by gas in a direction opposite to the filtering unit 2.
- Such action thus creates a decrease of the blow-by gas flow towards the filtering unit 2, increasing the action of the centrifugal force.
- the deviation unit 3 causes a decrease of the flow speed crossing the filtering element.
- This decrease of speed makes it possible to use a less efficient filtering unit 2, having higher air permeability, capable of offering less resistance to the passage of air without altering the total pressure drop which can measured straddling the separator device 1 with respect to the embodiments of the prior art without deviation elements 31, or the embodiment described above of the deviation device 3 with radial deviation elements 31, in which a clear variation of flow crossing the filtering unit 2 or of the crossing speed of the filtering unit 2 is not determined.
- the filtering unit 2 has an increase of permeability or porosity, increasing the amount of particulate which is accumulated by the filtering unit during the service life, which is therefore longer.
- the filtering unit 2 has a low filtering efficiency, for example of the pleated filter type, closed in the shape of a star or a porous depth septum consisting of fibrous synthetic material .
- the internal combustion engine has a specifically shaped housing in which the separator assembly is placed.
- blow-by gas separator device and the blow-by gas separator assembly which comprises it thoroughly fulfills the object of the present invention providing an effective solution which is alternative to the typical blow-by filter solutions of the prior art.
- the separator device is advantageously suitable to filter the blow-by gas, effectively separating the particles suspended by the air.
- the deviation unit is advantageously suitable to perform an action on the blow-by gas such to improve the separation action, and thus the filtering action, of the filtering unit.
- a further advantageous aspect resides in that different filtering unit types are envisaged as a function of the deviation unit type. So, by virtue of the synergistic action of the filtering unit and of the deviation device, the separator device is advantageously suitable to obtain surprising blow-by gas separation and filtering results.
- the separator device is simple to make and its assembling and installation is not complex.
- the separator device comprising a deviation unit substantially surrounding the filtering unit as a cage does not have high inertia moments.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT102016000018567 | 2016-02-23 | ||
ITUB2016A000992A ITUB20160992A1 (en) | 2016-02-23 | 2016-02-23 | SEPARATOR DEVICE FOR BLOW-BY GAS |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017145072A1 true WO2017145072A1 (en) | 2017-08-31 |
Family
ID=56027050
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2017/051014 WO2017145072A1 (en) | 2016-02-23 | 2017-02-22 | Separator device for blow-by gases |
Country Status (2)
Country | Link |
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IT (1) | ITUB20160992A1 (en) |
WO (1) | WO2017145072A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020240456A1 (en) * | 2019-05-29 | 2020-12-03 | Ufi Filters S.P.A. | Blow-by gas filtration assembly with support and control shaft |
CN113123846A (en) * | 2019-12-30 | 2021-07-16 | 上海欧菲滤清器有限公司 | Blow-by gas filter assembly having shaft with locking insert |
CN113117427A (en) * | 2019-12-30 | 2021-07-16 | 上海欧菲滤清器有限公司 | Blow-by gas filter assembly having shaft with outflow |
CN113117428A (en) * | 2019-12-30 | 2021-07-16 | 上海欧菲滤清器有限公司 | Axial blow-by gas filter assembly with threaded portion |
EP3929412A1 (en) * | 2020-06-24 | 2021-12-29 | RENAULT s.a.s. | Assembly comprising a cam shaft and an oil separator by centrifugation supported by said shaft |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB709646A (en) * | 1951-07-12 | 1954-06-02 | Rolls Royce | Improvements in or relating to oil separator means for engine breather arrangements |
US4714139A (en) * | 1985-10-02 | 1987-12-22 | Mtu Motoren-Und Turbinen Union Muenchen Gmbh | Lubricating system for gas turbine engines and pump for such a system |
-
2016
- 2016-02-23 IT ITUB2016A000992A patent/ITUB20160992A1/en unknown
-
2017
- 2017-02-22 WO PCT/IB2017/051014 patent/WO2017145072A1/en active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB709646A (en) * | 1951-07-12 | 1954-06-02 | Rolls Royce | Improvements in or relating to oil separator means for engine breather arrangements |
US4714139A (en) * | 1985-10-02 | 1987-12-22 | Mtu Motoren-Und Turbinen Union Muenchen Gmbh | Lubricating system for gas turbine engines and pump for such a system |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020240456A1 (en) * | 2019-05-29 | 2020-12-03 | Ufi Filters S.P.A. | Blow-by gas filtration assembly with support and control shaft |
CN113123846A (en) * | 2019-12-30 | 2021-07-16 | 上海欧菲滤清器有限公司 | Blow-by gas filter assembly having shaft with locking insert |
CN113117427A (en) * | 2019-12-30 | 2021-07-16 | 上海欧菲滤清器有限公司 | Blow-by gas filter assembly having shaft with outflow |
CN113117428A (en) * | 2019-12-30 | 2021-07-16 | 上海欧菲滤清器有限公司 | Axial blow-by gas filter assembly with threaded portion |
EP3929412A1 (en) * | 2020-06-24 | 2021-12-29 | RENAULT s.a.s. | Assembly comprising a cam shaft and an oil separator by centrifugation supported by said shaft |
FR3111943A1 (en) * | 2020-06-24 | 2021-12-31 | Renault Sas | ASSEMBLY CONTAINING ONE CAMSHAFT AND ONE OIL SEPARATOR PER CENTRIFUGATION CARRIED BY THIS SHAFT |
Also Published As
Publication number | Publication date |
---|---|
ITUB20160992A1 (en) | 2017-08-23 |
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