• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Summary An arrangement (2) for pre-combining in an air filter (4) for air intake of a requested air flow (6) to an internal combustion engine. The arrangement (2) comprises an ejector (8) adapted to suck out a second air flow (10) with air and particles from a pre-cleaner (12) in said air filter (4), and an extraction unit (14) arranged in connection with said ejector ( 8) and adapted to generate said second air flow (10) Than said purifier (12). The arrangement (2) further comprises a control unit (16) adapted to control said second air flow (10) for said extraction unit (14) by means of a control signal (18), the control unit (16) being adapted to control said second air flow (10) according to predetermined control rules depending on one or more parameters (20) related to the operation of the internal combustion engine. (Figure 1)
    公开号:SE1350910A1
    申请号:SE1350910
    申请日:2013-07-23
    公开日:2015-01-24
    发明作者:Jim Nordenvall
    申请人:Scania Cv Ab；
    IPC主号:
    专利说明:

    FIELD OF THE INVENTION The present invention relates to an arrangement according to the preamble of the independent claim, and more specifically to an arrangement in connection with a pre-cleaner in an air filter for separating particles from a requested air flow to an internal combustion engine.
    Background of the Invention A so-called ejector improves the efficiency of an air purifier with a pre-purifier. A purifier forms part of the air purifier and is located upstream of a main filter (sometimes called a filter cartridge) in the air purifier and which with centrifugal force separates larger particles than the air before it is filtered in the filter cartridge.
    An ejector increases the air mass flow through the pre-cleaner, which increases the efficiency. Wag, the air flow through the ejector is achieved, for example, by connecting the ejector in the pre-cleaner to the final pipe on the exhaust system, which means that dirty air is sucked out of the ejector and then forced out via the exhaust gases.
    In installations where the air inlet and the exhaust system are far apart, it is sometimes difficult to achieve a good efficiency for the ejector because a long and complicated pipe wiring can make the ejector ineffective.
    Another disadvantage of such a solution (connecting the ejector to the exhaust system) is that for engines with added air mass flow, they also have a lower efficiency for the ejector, due to that the venturi effect in the exhaust pipe becomes so small when there is a small mass flow.
    The following patent documents show examples of the use of pre-cleaners in air purification devices.
    GB1491157 discloses a centrifugal separating purifier which is emptied of separated dust by means of a suction flap.
    EP2136066 discloses a centrifugal separating pre-cleaner which is cleaned with a device. The device comprises a flap and is used concomitantly with a venturi device to suck the dirt out of the pre-cleaner.
    US1530645 shows that as an alternative to a venturi in the exhaust system for sucking out particles from a centrifugal separating air purifier, a flake in combination with venturi can be used or only a flake.
    EP1918009 discloses a purifier which separates particles into the air by centrifugal force. Large particles near the outer wall of the pre-cleaner are sucked out with the help of the cooling surface.
    US5472463 discloses a purifier which is cleaned by an electrically driven vane sucking out particles.
    The object of the present invention is to achieve an improved arrangement in true straps with air purifiers which exhibit energetic and construction-related advantages in comparison with the current system.
    Summary of the Invention The above objects are achieved by the invention defined by the independent claim.
    Preferred embodiments are defined by the dependent claims.
    The invention relates to an electrically driven vane for ejecting particles from purifiers. The ejecting flux increases the efficiency of the pre-cleaner by increasing the air flow through the pre-cleaner and thus increasing the centrifugal force which contributes to an increasing degree of purification for the pre-cleaner at the same time as it sucks out dirty air.
    The electric ejector according to the invention has a demand-controlled control, ie. it is activated at a specified air mass flow and that it cla delivers a capacity of a predetermined part, e.g. 10%, of the air mass flow required by the turbo.
    With a laid air mass flock, you do not suck in as much dust in the inlet system and if it is then activated, it would only be an unnecessary energy supply.
    The arrangement according to the invention is completely independent of how the exhaust system is constructed and works for all installations.
    The performance of the pre-cleaner is improved, which means that the replacement interval of the air filter for the vehicle is required.
    For vehicles that today cannot have a pre-cleaner with an ejector due to With the arrangement according to the invention, those responsible for installing connections to the exhaust system (among other things in buses and other vehicles) can install one and thereby improve the performance significantly for the air filter.
    The demand-controlled ejector effect ensures that you get the ejector effect when it is needed and gives the next effect.
    Brief Description of the Drawings Figure 1 shows a schematic block diagram illustrating the present invention. Figure 2 shows a schematic cross-section illustrating an embodiment of the present invention.
    Figure 3 shows a schematic cross-section of a pre-cleaner in an air filter illustrating another embodiment of the invention.
    DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS OF THE INVENTION With reference to the accompanying figures, the invention will now be described in detail.
    In the figures, the same or similar details have consistently been given the same male designation.
    The invention relates to an arrangement 2 which is schematically shown in figure 1. The arrangement is intended to be used when pre-combining in an air filter 4 for air intake of a requested air flow 6 to an internal combustion engine, via a carburettor device or in an fuel injection system. The internal combustion engine is not shown in the figure as it is a per se known device with a known function which therefore does not need to be described in more detail.
    The arrangement 2 comprises an ejector 8 adapted to suck out a second air flow 10 with air and particles Than a pre-cleaner 12 in said air filter 4 and an extraction unit 14 arranged in connection with the ejector 8 and adapted to generate the second air flow 10 from the pre-cleaner 12.
    The arrangement 2 further comprises a control unit 16 adapted to control the second air flow 10 for the extraction unit 14 by means of a control signal 18. The control of the second air flow 10 takes place according to predetermined control rules depending on one or more parameters 20 related to the operation of the internal combustion engine.
    The air filter 4 is an air filter of a commonly used type which comprises a main filter 22 adjacent to the pre-cleaner and that the pre-cleaner 12 is adapted to purify the air before it reaches the main filter 22. The pre-cleaner 12 is adapted to separate particles of the air by centrifugal force outer part of the pre-purifier 12 and that said ejector 8 is arranged in said outer part for sucking out the second air flow 10. The main filter 22 further has an opening for suction of an air flow 23 which constitutes the sum of the requested air flow 6 and the second air flow 10. .
    According to one embodiment, said parameters 20 comprise the requested air flow 6 to the carburettor device. The size of the requested air flow 6 naturally depends, among other things, on the engine power, requested engine speed, engine load, etc. For trucks, a normal air flow in the range 15-35 m3 / minute depends on engine power and for buses it is in the range 15-28 m3 / minute. . An air flow of 10 m3 / minute is considered a laid air flow.
    According to another embodiment, said parameters 20 comprise a requested speed of the internal combustion engine.
    According to a further embodiment, said parameters 20 comprise the engine load for the internal combustion engine.
    Often a combination of several parameters is used, for example the requested engine speed and engine load are used in combination with the notor size a requested air flow. Of course, several parameters of the mentioned parameters can be used simultaneously to achieve a demand-controlled activation of the extraction unit 14.
    The parameters are preferably available to the control unit from the vehicle's CAN bus (not shown).
    Preferably, the control rules comprise a rule which involved feeding said requested air flow 6 to the carburetor device with a threshold value for requested air flow 6, and if the requested air flow 6 falls below the threshold value, said second air flow 10 is controlled to be zero. The threshold value can, for example, be a requested air flow that is at a low level, which was exemplified above.
    According to another control rule, the demand-controlled control of the second air flow is achieved. More specifically, this is done in that control rules are adapted to control the second air flow 10 so that it forms a predetermined part of the requested air flow 6.
    The predetermined portion is in the range of 5-15%, preferably in the range of 8-12%, for example about 10%.
    The second air flow can be effected in a number of different ways by the extraction unit 14. According to a variant, the extraction unit 14 is constituted by a flux which can either directly or indirectly generate the second air flow. The flat is preferably electrically driven. Of course, pneumatically and hydraulically driven flaps can also be used.
    The schematic block diagram shown in Figure 2 shows an embodiment in which the extraction unit 14 is formed by a flat which has been mounted in a pipe connection which is connected to the ejector 8, i.e. the float generates a direct air flow that sucks out air Than the Purifier. The flight is controlled by the control signal 18 so that the desired second air flow 10 is achieved.
    In the schematic block diagram shown in Figure 3, the second air flow 10 is provided instead indirectly. If the surface 14 is positioned so that it sucks in air from the surroundings and the river (illustrated with arrows) which is then generated in an outer tube 24 creates a negative pressure in the mouth of an inner tube 26 which opens into the outer tube. The negative pressure generates one flood, the second flood 10, in the inner tube 26. The suction opening 28 for the outer tube may, for example, be mounted in the engine housing for the combustion engine. With such an installation, this contributes to lowering the temperature in the engine compartment, which has positive effects on the service life of the engine components. A night 28 is preferably provided on the intake port to prevent particles from being sucked into the outer tube.
    In a comparison between the [Ada embodiments illustrated in Figures 2 and 3 regarding the effect that the flattening must be able to generate, there are the following differences.
    In the embodiment shown in Figure 2, a flux is required which can only handle 10% of the air mass flow requested by the carburettor.
    In the embodiment shown in Figure 3, the flux is not in the second air flow. This means that it is necessary to have a higher mass flow than for the float in Figure 2. According to one example, the efficiency of the installation according to Figure 3 would be about 10% and this would mean that the capacity of the flake would need to be of a true magnitude to achieve the required air flow. .
    The present invention is not limited to the above-described preferred embodiments. Different alternatives, modifications and equivalents can be used.
    The above embodiments are, therefore, not to be construed as limiting the scope of the invention as defined by the appended claims.
    权利要求:
    Claims (3)
    [1]
    An ejector (8) adapted to suck out a second air flow (10) with air and particles Than a Purifier (12) in said air filter (4),
    [2]
    An extraction unit (14) arranged in connection with said ejector (8) and adapted to generate said second air flow (10) from said pre-purifier (12), characterized in that the arrangement (2) comprises
    [3]
    A control unit (16) adapted to control said second air flow (10) for said extraction unit (14) by means of a control signal (18), the control unit (16) being adapted to control said second air flow (10) according to predetermined control rules depending on one or more parameters (20) related to the operation of the internal combustion engine. The arrangement (2) according to claim 1, wherein said parameters (20) comprise said requested air flow (6) to the internal combustion engine. The arrangement (2) according to claim 1 or 2, wherein said parameters (20) comprise the requested speed of the internal combustion engine. The arrangement (2) according to any one of claims 1-3, wherein said parameters (20) comprise the engine load of the internal combustion engine. The arrangement (2) according to any one of claims 1-4, wherein said control rules comprise comparing said requested air flow (6) to the carburettor device with a required air flow threshold (6), and if the requested air flow (6) is below said second threshold, said second threshold is controlled. air flow (10) to be zero. The arrangement (2) according to any one of claims 1-5, wherein said control rules are adapted to control said second air flow (10) so that it forms a predetermined part of the requested air flow (6). The arrangement (2) according to claim 6, wherein said predetermined portion is in the range of 5-15%, preferably in the range of 8-12%. The arrangement (2) according to any one of claims 1-7, wherein said extraction unit (14) is a flat. The arrangement (2) according to any one of claims 1-8, wherein said air filter (4) comprises a main filter (22) and said purifier (12) is adapted to purify the air before it reaches the main filter (22). The arrangement (2) according to any one of claims 1-9, wherein the pre-cleaner (12) is adapted to separate particles from the air with centrifugal force to a radially coated outer part of the pre-cleaner (12) and that said ejector (8) is arranged in said outer part . 1/1 of 4
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    同族专利:
    公开号 | 公开日
    SE538986C2|2017-03-14|
    WO2015012756A1|2015-01-29|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3469566A|1967-01-19|1969-09-30|Hastings Mfg Co|Centrifugal air precleaner with blower|
    JP2005163597A|2003-12-02|2005-06-23|Komatsu Ltd|Centrifugal dust separation device|
    US8424279B2|2007-03-28|2013-04-23|United Technologies Corporation|Particle separator and debris control system|
    US8007565B2|2007-10-23|2011-08-30|The Sy-Klone Company|Powered air cleaning system and air cleaning method|
    GB0809111D0|2008-05-20|2008-06-25|Agco Sa|Air filter system|
    WO2013102169A2|2011-12-30|2013-07-04|Rolls-Royce North American Technologies Inc.|Blower for use with air particle separator|EP3193005B1|2016-01-15|2018-12-12|AGCO International GmbH|A pre-filter system for a vehicle|
    法律状态:
    2021-03-02| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE1350910A|SE538986C2|2013-07-23|2013-07-23|Arrangements in connection with air filters|SE1350910A| SE538986C2|2013-07-23|2013-07-23|Arrangements in connection with air filters|
    PCT/SE2014/050751| WO2015012756A1|2013-07-23|2014-06-18|Arrangement for use with an air filter|
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