EP0348904A1 - Air filter unit for an industrial vehicle - Google Patents
Air filter unit for an industrial vehicle Download PDFInfo
- Publication number
- EP0348904A1 EP0348904A1 EP19890111689 EP89111689A EP0348904A1 EP 0348904 A1 EP0348904 A1 EP 0348904A1 EP 19890111689 EP19890111689 EP 19890111689 EP 89111689 A EP89111689 A EP 89111689A EP 0348904 A1 EP0348904 A1 EP 0348904A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- compartment
- unit
- chamber
- filter
- partition
- 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
- 238000005192 partition Methods 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 230000005465 channeling Effects 0.000 claims abstract description 6
- 239000012141 concentrate Substances 0.000 abstract description 3
- 230000005484 gravity Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000011362 coarse particle Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/14—Combined air cleaners and silencers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/02—Air cleaners
- F02M35/08—Air cleaners with means for removing dust, particles or liquids from cleaners; with means for indicating clogging; with by-pass means; Regeneration of cleaners
- F02M35/088—Water, snow or ice proofing; Separation or drainage of water, snow or ice
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1205—Flow throttling or guiding
- F02M35/1211—Flow throttling or guiding by using inserts in the air intake flow path, e.g. baffles, throttles or orifices; Flow guides
Definitions
- This invention relates to an air filter unit for an industrial vehicle.
- Industrial vehicles are known to normally comprise a filter unit for the engine intake air consisting of a filter chamber housing a porous means for separating the particles suspended in the air, and means for pretreating the air upstream of the filter chamber to separate water and coarse particles from the air.
- These pretreatment means generally comprise a vertical intake pipe or "snorkel" provided with an upper air inlet at a large distance from the ground, and means for separating water and powdery particles, such as cyclones and the like.
- the object of the present invention is to provide an air filter unit for an industrial vehicle which is free of the aforesaid drawbacks of known units.
- an air filter unit for an industrial vehicle comprising an outer casing defining a pretreatment chamber provided with an upper inlet port and interception and channeling means arranged substantially to separate the water from the intake air, and a filter chamber housing a hollow cylindrical filter and provided with an upper outlet port communicating with a central cavity of said filter, said pretreatment and filter chambers being positioned side-by-side and communicating with each other through an aperture in said casing which defines them, characterised in that said interception and channeling means comprise a first partition disposed vertically inside said pretreatment chamber and defining therein a first compartment communicating with said inlet port and a second compartment communicating with said communication aperture between said chambers, said first and second compartment communicating with each other through an aperture between the lower edge of said partition and the lower wall of said pretreatment chamber, and a second partition extending from that wall of said pretreatment chamber which faces said filter chamber to the interior of said second compartment, below said communication aperture between said chambers.
- the reference numeral 1 indicates an air filter unit for an industrial vehicle.
- the unit 1 comprises an outer casing 2 constructed in several parts conveniently of pressed sheet metal or moulded plastics, to define overall a pretreatment chamber 3 and a filter chamber 4 which are disposed side-by-side and communicate with each other.
- the chamber 4 is substantially of barrel shape
- the chamber 3 is substantially of parallelepiped shape with a height less than the chamber 4, and is bounded laterally by three substantially flat walls 5 and by a concave wall 6 which substantially reproduces the profile of a portion 7 of a lateral wall of the chamber 4, which it faces.
- the intake pipe stub 9 communicates with a zone of the chamber 3 which is external to the chamber 4 and has its mouth cross-section of elongated form in a horizontal and downwardly inclined direction.
- the delivery pipe stub 10 communicates through a circular aperture 15 with a central zone of the filter chamber 4 which houses a hollow cylindrical filter 16 of conventional type. Said filter 16 therefore defines an axial duct 17 which faces the aperture 15.
- the chambers 3 and 4 communicate with each other through a horizontal oblong aperture 18 provided in proximity to the upper wall 8.
- the chamber 3 is divided transversely by a partition 19 which extends downwards from the upper wall 8 of the chamber 3, which is therefore divided into a first compartment 20 communicating with the intake pipe stub 9 and a second compartment 21 communicating with the aperture 18.
- the partition 19 is provided with a lower rounded edge 24 having a cross-section shaped substantially as a droplet inclined towards the compartment 21, to define with the lower wall 25 of the chamber 3 an aperture 26 giving communication between the first compartment 20 and the second compartment 21.
- a hollow pipe stub 27 of corresponding section which projects into the second compartment 21 and terminates with an outwardly rounded edge 28.
- a projection 33 forming a drip ledge described hereinafter projects into the compartment 21 from the upper wall 8 of the casing 2.
- the operation of the unit 1 is as follows. Air enters the unit 1 through the intake port 14 of the pipe stub 9 and passes into the compartment 20 of the chamber 3.
- the purpose of the vertical partition 19 is to prevent any direct entry of water into the chamber 4 and to determine, within the chamber 3, a U-shaped path (compartment 20 - aperture 26 - compartment 21) which is able to separate the water droplets by centrifugal action onto the lower wall 25 of the chamber 3.
- the purpose of the lower rounded edge 24 is to reduce the local pressure drop caused by breaking up the fluid flow.
- the air then passes into the compartment 21, and most of the droplets which remain after the centrifugal action are entrained upwards by the fluid flow along the wall 6.
- These droplets are then intercepted by the flow breaker partition 29, from which they precipitate onto the bottom wall 25.
- the air now almost free of water, proceeds upwards passing beyond the flow breaker wall 29. Any minute droplets still present in suspension tend to concentrate on the upper wall 8, again by centrifugal effect, and to run along it to the drip ledge 33, which concentrates them into droplets of larger mass so that they fall by gravity.
- the rounded edge 28 of the pipe stub 27 has the double purpose of reducing pressure drop through the mouth and to form a collection channel for conveying downwards by gravity the water which adheres to the outer walls of the pipe stub 27, including by the effect of the drip ledge 33.
- the substantially “dry” air then passes through the pipe stub 27 and into the chamber 4 in which it is filtered by the filter 16, which retains the suspended impurities, after which it flows through the duct 17 and pipe stub 10 to the vehicle engine.
- the water which collects on the base wall 25 of the chamber 3 is evacuated through the valves 30, provided for this purpose in the regions of low suction.
- the shape and arrangement of the internal elements of the chamber 3 ensure almost total separation of the water or mud before the proper filtration. This means that the filter clogging problems are eliminated and that the snorkel can be dispensed with. Said effects combined with particular expedients in the construction of the elements (edge 24 of the partition 19, edge 28 of the pipe stub 27) result in considerable overall reduction of the intake pressure drop.
- the partitions 29 and 19, conveniently dimensioned in relation to the dimensions of the chamber 3, provide an effective silencing of the engine intake noise.
- a partition can be placed in the chamber 4 between the pipe stub 27 and that portion of the filter 16 facing it, to prevent rapid clogging of that zone.
- the unit 1 can comprise a conventional snorkel either in place of the intake pipe stub 9 or connected to it.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
Description
- This invention relates to an air filter unit for an industrial vehicle.
- Industrial vehicles are known to normally comprise a filter unit for the engine intake air consisting of a filter chamber housing a porous means for separating the particles suspended in the air, and means for pretreating the air upstream of the filter chamber to separate water and coarse particles from the air. These pretreatment means generally comprise a vertical intake pipe or "snorkel" provided with an upper air inlet at a large distance from the ground, and means for separating water and powdery particles, such as cyclones and the like.
- These known filter units have certain drawbacks. Firstly, they result in substantial pressure drop in the intake air, resulting in higher fuel consumption and a more smoky engine; they are also rather bulky and costly.
- The object of the present invention is to provide an air filter unit for an industrial vehicle which is free of the aforesaid drawbacks of known units.
- Said object is attained according to the present invention by an air filter unit for an industrial vehicle, of the type comprising an outer casing defining a pretreatment chamber provided with an upper inlet port and interception and channeling means arranged substantially to separate the water from the intake air, and a filter chamber housing a hollow cylindrical filter and provided with an upper outlet port communicating with a central cavity of said filter, said pretreatment and filter chambers being positioned side-by-side and communicating with each other through an aperture in said casing which defines them, characterised in that said interception and channeling means comprise a first partition disposed vertically inside said pretreatment chamber and defining therein a first compartment communicating with said inlet port and a second compartment communicating with said communication aperture between said chambers, said first and second compartment communicating with each other through an aperture between the lower edge of said partition and the lower wall of said pretreatment chamber, and a second partition extending from that wall of said pretreatment chamber which faces said filter chamber to the interior of said second compartment, below said communication aperture between said chambers. The present invention will be more apparent from the detailed description of one embodiment thereof given hereinafter by way of non-limiting example with reference to the accompanying drawing, which is an elevational view thereof shown in partial section. In the accompanying drawing, the reference numeral 1 indicates an air filter unit for an industrial vehicle.
- The unit 1 comprises an outer casing 2 constructed in several parts conveniently of pressed sheet metal or moulded plastics, to define overall a
pretreatment chamber 3 and a filter chamber 4 which are disposed side-by-side and communicate with each other. In particular, the chamber 4 is substantially of barrel shape, whereas thechamber 3 is substantially of parallelepiped shape with a height less than the chamber 4, and is bounded laterally by three substantiallyflat walls 5 and by a concave wall 6 which substantially reproduces the profile of a portion 7 of a lateral wall of the chamber 4, which it faces. - From the
upper wall 8 of the casing 2 there branch, both in a horizontal direction, an air intake pipe stub 9, and an airdelivery pipe stub 10 to be connected to the engine feed pipe. The intake pipe stub 9 communicates with a zone of thechamber 3 which is external to the chamber 4 and has its mouth cross-section of elongated form in a horizontal and downwardly inclined direction. Thedelivery pipe stub 10 communicates through acircular aperture 15 with a central zone of the filter chamber 4 which houses a hollowcylindrical filter 16 of conventional type. Saidfilter 16 therefore defines an axial duct 17 which faces theaperture 15. - The
chambers 3 and 4 communicate with each other through a horizontal oblong aperture 18 provided in proximity to theupper wall 8. - According to the present invention, the
chamber 3 is divided transversely by apartition 19 which extends downwards from theupper wall 8 of thechamber 3, which is therefore divided into afirst compartment 20 communicating with the intake pipe stub 9 and asecond compartment 21 communicating with the aperture 18. Thepartition 19 is provided with a lowerrounded edge 24 having a cross-section shaped substantially as a droplet inclined towards thecompartment 21, to define with thelower wall 25 of thechamber 3 anaperture 26 giving communication between thefirst compartment 20 and thesecond compartment 21. - Within the aperture 18 there is fixed a hollow pipe stub 27 of corresponding section, which projects into the
second compartment 21 and terminates with an outwardlyrounded edge 28. - From the wall 6 of the
chamber 3, below the pipe stub 27, there projects a downwardly inclinedflow breaker partition 29 which projects into thecompartment 21 for a length slightly greater than the pipe stub 27. - In proximity to the opposing side ends of the
lower wall 25 of thechamber 3 there are disposed twobleed valves 30 of known type, of which only one is partly visible in Figure 1. - Finally, a projection 33 forming a drip ledge described hereinafter projects into the
compartment 21 from theupper wall 8 of the casing 2. - The operation of the unit 1 is as follows. Air enters the unit 1 through the
intake port 14 of the pipe stub 9 and passes into thecompartment 20 of thechamber 3. The purpose of thevertical partition 19 is to prevent any direct entry of water into the chamber 4 and to determine, within thechamber 3, a U-shaped path (compartment 20 - aperture 26 - compartment 21) which is able to separate the water droplets by centrifugal action onto thelower wall 25 of thechamber 3. - The purpose of the lower
rounded edge 24 is to reduce the local pressure drop caused by breaking up the fluid flow. The air then passes into thecompartment 21, and most of the droplets which remain after the centrifugal action are entrained upwards by the fluid flow along the wall 6. These droplets are then intercepted by theflow breaker partition 29, from which they precipitate onto thebottom wall 25. The air, now almost free of water, proceeds upwards passing beyond theflow breaker wall 29. Any minute droplets still present in suspension tend to concentrate on theupper wall 8, again by centrifugal effect, and to run along it to the drip ledge 33, which concentrates them into droplets of larger mass so that they fall by gravity. - The
rounded edge 28 of the pipe stub 27 has the double purpose of reducing pressure drop through the mouth and to form a collection channel for conveying downwards by gravity the water which adheres to the outer walls of the pipe stub 27, including by the effect of the drip ledge 33. The substantially "dry" air then passes through the pipe stub 27 and into the chamber 4 in which it is filtered by thefilter 16, which retains the suspended impurities, after which it flows through the duct 17 andpipe stub 10 to the vehicle engine. - The water which collects on the
base wall 25 of thechamber 3 is evacuated through thevalves 30, provided for this purpose in the regions of low suction. - The advantages of the unit 1 constructed in accordance with the present invention are apparent from an examination of its characteristics.
- Firstly, the shape and arrangement of the internal elements of the chamber 3 (
vertical partition 19,flow breaker partition 29, pipe stub 27, drip ledge 33) ensure almost total separation of the water or mud before the proper filtration. This means that the filter clogging problems are eliminated and that the snorkel can be dispensed with. Said effects combined with particular expedients in the construction of the elements (edge 24 of thepartition 19,edge 28 of the pipe stub 27) result in considerable overall reduction of the intake pressure drop. - The
partitions chamber 3, provide an effective silencing of the engine intake noise. - Further advantages are the constructional simplicity and reduced overall cost of the filter unit.
- Finally, it is apparent that modifications can be made to the unit 1 which do not leave the scope of protection of the present invention. For example, a partition can be placed in the chamber 4 between the pipe stub 27 and that portion of the
filter 16 facing it, to prevent rapid clogging of that zone. In addition, the unit 1 can comprise a conventional snorkel either in place of the intake pipe stub 9 or connected to it.
Claims (9)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT5326488U | 1988-06-28 | ||
IT5326488U IT214604Z2 (en) | 1988-06-28 | 1988-06-28 | AIR FILTERING GROUP FOR AN INDUSTRIAL VEHICLE |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0348904A1 true EP0348904A1 (en) | 1990-01-03 |
EP0348904B1 EP0348904B1 (en) | 1993-03-17 |
Family
ID=11281326
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19890111689 Expired - Lifetime EP0348904B1 (en) | 1988-06-28 | 1989-06-27 | Air filter unit for an industrial vehicle |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0348904B1 (en) |
DE (1) | DE68905389T2 (en) |
ES (1) | ES2039761T3 (en) |
IT (1) | IT214604Z2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1056910C (en) * | 1994-09-27 | 2000-09-27 | 日野自动车工业株式会社 | Structure for preventing water from entering into duct |
CN1056911C (en) * | 1994-12-08 | 2000-09-27 | 日野自动车工业株式会社 | Channel unit structure for duct |
EP1519030A1 (en) * | 2003-09-25 | 2005-03-30 | FIAT AUTO S.p.A. | An air filter for a motor vehicle |
EP1589216A1 (en) * | 2004-04-15 | 2005-10-26 | Kwang Yang Motor Co., Ltd. | Air cleaner for engines |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006041732B4 (en) * | 2006-09-01 | 2016-03-10 | Siemens Aktiengesellschaft | Device for filtering an airflow |
DE102007011452A1 (en) | 2007-03-06 | 2008-09-11 | Siemens Ag | Apparatus for the pretreatment of air for an air conditioner of a rail vehicle |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1576402A1 (en) * | 1967-06-03 | 1970-03-05 | Porsche Kg | Intake system for internal combustion engines |
DE2005788A1 (en) * | 1970-02-09 | 1971-08-26 | Hanomag Henschel Fahrzeugwerke GmbH, 3000 Hannover Linden | Air filters, especially for motor vehicles, with an upstream pre-separator |
EP0038018A1 (en) * | 1980-04-12 | 1981-10-21 | MAN Technologie GmbH | Oil separator for the compressor of a heat pump or a refrigeration machine |
US4419112A (en) * | 1981-08-26 | 1983-12-06 | Kawasaki Jukogyo Kabushiki Kaisha | Air cleaner |
FR2599272A1 (en) * | 1986-05-27 | 1987-12-04 | Gilardini Spa | Air filter for vehicles |
FR2605271A1 (en) * | 1986-10-17 | 1988-04-22 | Gilardini Spa | AIR SUCTION GROUP FOR INDUSTRIAL VEHICLES |
-
1988
- 1988-06-28 IT IT5326488U patent/IT214604Z2/en active
-
1989
- 1989-06-27 ES ES89111689T patent/ES2039761T3/en not_active Expired - Lifetime
- 1989-06-27 EP EP19890111689 patent/EP0348904B1/en not_active Expired - Lifetime
- 1989-06-27 DE DE1989605389 patent/DE68905389T2/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1576402A1 (en) * | 1967-06-03 | 1970-03-05 | Porsche Kg | Intake system for internal combustion engines |
DE2005788A1 (en) * | 1970-02-09 | 1971-08-26 | Hanomag Henschel Fahrzeugwerke GmbH, 3000 Hannover Linden | Air filters, especially for motor vehicles, with an upstream pre-separator |
EP0038018A1 (en) * | 1980-04-12 | 1981-10-21 | MAN Technologie GmbH | Oil separator for the compressor of a heat pump or a refrigeration machine |
US4419112A (en) * | 1981-08-26 | 1983-12-06 | Kawasaki Jukogyo Kabushiki Kaisha | Air cleaner |
FR2599272A1 (en) * | 1986-05-27 | 1987-12-04 | Gilardini Spa | Air filter for vehicles |
FR2605271A1 (en) * | 1986-10-17 | 1988-04-22 | Gilardini Spa | AIR SUCTION GROUP FOR INDUSTRIAL VEHICLES |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1056910C (en) * | 1994-09-27 | 2000-09-27 | 日野自动车工业株式会社 | Structure for preventing water from entering into duct |
CN1056911C (en) * | 1994-12-08 | 2000-09-27 | 日野自动车工业株式会社 | Channel unit structure for duct |
EP1519030A1 (en) * | 2003-09-25 | 2005-03-30 | FIAT AUTO S.p.A. | An air filter for a motor vehicle |
EP1589216A1 (en) * | 2004-04-15 | 2005-10-26 | Kwang Yang Motor Co., Ltd. | Air cleaner for engines |
Also Published As
Publication number | Publication date |
---|---|
IT214604Z2 (en) | 1990-05-09 |
DE68905389T2 (en) | 1993-10-14 |
EP0348904B1 (en) | 1993-03-17 |
ES2039761T3 (en) | 1993-10-01 |
IT8853264V0 (en) | 1988-06-28 |
DE68905389D1 (en) | 1993-04-22 |
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