GB2554900B - Motor vehicle air induction damper apparatus - Google Patents
Motor vehicle air induction damper apparatus Download PDFInfo
- Publication number
- GB2554900B GB2554900B GB1617346.0A GB201617346A GB2554900B GB 2554900 B GB2554900 B GB 2554900B GB 201617346 A GB201617346 A GB 201617346A GB 2554900 B GB2554900 B GB 2554900B
- Authority
- GB
- United Kingdom
- Prior art keywords
- granular material
- damper apparatus
- passageway
- porous granular
- air
- 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.)
- Active
Links
- 230000006698 induction Effects 0.000 title claims description 38
- 239000008187 granular material Substances 0.000 claims description 67
- 229930195733 hydrocarbon Natural products 0.000 claims description 42
- 150000002430 hydrocarbons Chemical class 0.000 claims description 42
- 239000004215 Carbon black (E152) Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 238000013016 damping Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 239000000446 fuel Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000012780 transparent material Substances 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 238000010348 incorporation Methods 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical group 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Chemical group 0.000 description 1
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
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1272—Intake silencers ; Sound modulation, transmission or amplification using absorbing, damping, insulating or reflecting materials, e.g. porous foams, fibres, rubbers, fabrics, coatings or membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0407—Constructional details of adsorbing systems
-
- 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
- F02M35/0218—Air cleaners acting by absorption or adsorption; trapping or removing vapours or liquids, e.g. originating from fuel
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Gas After Treatment (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Description
MOTOR VEHICLE AIR INDUCTION DAMPER APPARATUS
FIELD OFTHE INVENTION
The present invention relates to a damper apparatus for an air induction system of a motor vehicle. Aspects of the invention relate to a damper apparatus, to a system, to a vehicle, and to a method.
BACKGROUND
It is desirable to attenuate acoustic vibrations from a vehicle. One source of acoustic vibrations is via acoustic energy which leaves an engine via an air intake, also called an air induction system.
Evaporative emissions of hydrocarbons (HC) from motor vehicles when parked are a known environmental issue. Evaporative emissions may be caused when small quantities of fuel vapour flow from the engine in a reverse direction along air induction conduits of the vehicle and out from an air intake of the vehicle.
One way of reducing or preventing evaporative emissions is to provide a hydrocarbon trap in the air intake of the vehicle. It is known to provide a flow-through trap in the form of a membrane of a hydrocarbon-trapping medium in an air filter compartment of a vehicle. Flowthrough traps have the disadvantage that a back pressure is developed on air being drawn through the trap. WO 2012/152894 A1 describes an apparatus which fits in an air induction system of a vehicle. The apparatus has a passageway. A sheet of HC trapping material is provided around the passageway, and a damper is provided around the sheet of HC trapping material.
It is desirable to further reduce acoustic emissions and/or evaporative HC emissions.
STATEMENT OF THE INVENTION
Embodiments of the invention provide an apparatus, an air induction system, a motor vehicle and a method. Embodiments of the invention may be understood by reference to the appended claims.
In one aspect of the invention for which protection is sought there is provided a damper apparatus for an air induction system of a motor vehicle, the apparatus comprising: a housing; a passageway through the housing through which induction air may be drawn to an engine of the vehicle; and a quantity of porous granular material provided around the passageway between the passageway and the housing, wherein the porous granular material provides an acoustic damping function on acoustic vibrations in the induction air and also provides a flow-past hydrocarbon trapping function on hydrocarbon vapours entering the passageway from the engine.
The porous granular material is a multi-scale porous granular material.
The porous granular material may be activated carbon.
The damper apparatus may comprise a tubular cage within the housing which is configured to define the passageway through the apparatus, the tubular cage having a plurality of windows or apertures defined in it, and wherein the porous granular material is disposed between the housing and the tubular cage.
The housing and the tubular cage may be substantially cylindrical in shape, the housing and tubular cage being substantially coaxial.
The damper apparatus may comprise a retaining layer between the tubular cage and the porous granular material.
The retaining layer may be formed of a material which is acoustically transparent and porous to hydrocarbons.
The damper apparatus may comprise a bag which contains the porous granular material.
The bag may have an inner side, an outer side and radial ends and enclose an annular volume.
At least the inner side of the bag may be formed of a material which is acoustically transparent and which is porous to hydrocarbons.
The quantity of porous granular material may partially occupy a volume between the passageway and the housing.
The porous granular material may be arranged to release trapped hydrocarbons to airflow through the passageway when induction air is drawn through the damper apparatus during normal engine operation.
In at least one embodiment, there is no other acoustic damper component (e.g. a fleece or other component) within the damper apparatus. The porous granular material is the sole component which provides the function of damping or attenuating acoustic vibrations in the induction air.
In at least one embodiment, there is no other hydrocarbon trap within the damper apparatus. The porous granular material is the sole component which provides the function of trapping hydrocarbons.
In a further aspect of the invention there is provided an air induction system for a motor vehicle comprising a damper apparatus.
In a further aspect of the invention there is provided a motor vehicle comprising an air induction system.
In a further aspect of the invention there is provided a method comprising: providing a damper apparatus in an air induction system of a motor vehicle, the damper apparatus comprising a housing, a passageway and a quantity of porous granular material provided around the passageway between the passageway and the housing; when an engine of the motor vehicle is switched on, drawing air through the damper apparatus and using the quantity of porous granular material to attenuate acoustic vibrations in the induction air; when an engine of the motor vehicle is switched off, using the quantity of porous granular material to trap hydrocarbons from hydrocarbon vapours flowing through the passageway.
The method may comprise, when an engine of the motor vehicle is switched on, releasing trapped hydrocarbons to airflow through the passageway.
At least one embodiment has an advantage of reducing attenuation of acoustic vibrations.
At least one embodiment has an advantage of providing functions of attenuating acoustic vibrations and trapping hydrocarbons. This can avoid the need for a separate hydrocarbon trap, and can reduce complexity of the damper apparatus.
At least one embodiment has an advantage that a back pressure on air flowing through the damper may be substantially unaffected as the hydrocarbon trap is a flow-past trap rather than a flow-through trap or filter.
Advantageous features of the invention are mentioned in the following description and in the claims appended hereto.
Within the scope of this application it is expressly intended that the various aspects, embodiments, examples and alternatives set out in the preceding paragraphs, in the claims and/or in the following description and drawings, and in particular the individual features thereof, may be taken independently or in any combination. That is, all embodiments and/or features of any embodiment can be combined in any way and/or combination, unless such features are incompatible. The applicant reserves the right to change any originally filed claim or file any new claim accordingly, including the right to amend any originally filed claim to depend from and/or incorporate any feature of any other claim although not originally claimed in that manner.
BRIEF DESCRIPTION OF THE DRAWINGS
Embodiments of the invention will now be described, by way of example only, with reference to the accompanying figures in which: FIGURE 1 is a schematic drawing of a vehicle; FIGURE 2 shows an air induction system with a damper apparatus; FIGURE 3 shows a side view of the damper apparatus; FIGURE 4 shows a cross-section through the damper apparatus; FIGURE 5 shows a cage used within the damper apparatus; FIGURE 6 shows structure of the granular material at different scales.
DETAILED DESCRIPTION
Figure 1 shows an example of a vehicle 10 in which apparatus according to an embodiment of the present invention may be used. The vehicle 10 has an internal combustion engine (ICE) 15. A clutch 16 couples an output of the engine 15 to a transmission 17, which is in turn coupled to a driveline 18 of the vehicle 10. The transmission 17 may be arranged to: drive only a pair of front wheels 11,12 (i.e. front wheel drive); drive only a pair of rear wheels 13, 14, (i.e. rear wheel drive); or drive all four wheels (i.e. four wheel drive). Embodiments of the invention are also suitable for vehicles having less than four wheels or more than four wheels.
An air induction system 20 provides air to the engine 15, optionally via a compressor 19. Figure 2 shows the air induction system 20 in more detail. The air induction system 20 comprises an air filter 21 with an air inlet 22 and an air outlet 23. The air outlet 23 is connected to an airflow path which leads to an air intake of a compressor 19 and on to the engine 15. The airflow path may comprise one or more of: a flexible conduit 25 and a rigid conduit 26. A damper apparatus 30 is fitted in the airflow path between the air filter 21 and the compressor 19. Another name for the damper apparatus 30 is a pulsation damper. The damper apparatus has a first end (inlet) 31 and a second end (outlet) 32. In this example the damper apparatus 30 is connected between a flexible conduit 25 and a rigid conduit 26, but it will be appreciated that the damper apparatus 30 may be connected between a pair of flexible conduits 25, or the damper apparatus 30 may have one end connected directly to the air outlet 23 of the air filter 21 and the other end connected to a flexible conduit 25. The damper apparatus 30 has an airflow passageway 33 longitudinally through the apparatus. The damper apparatus 30 has a function of attenuating, or damping, acoustic vibrations along the air flow path of the induction system. The vehicle may have two (or more) of the air induction systems 20, such as a left-hand air induction system and a right-hand air induction system.
In use, air enters the air filter 21 via the air inlet 22 and passes through the air filter 21 where particles are removed/trapped by filter material. Filtered air exits the air outlet 23 of the air filter 21 and flows along conduit 25. Air flows along the longitudinal passageway 33 through the damper apparatus 30 and continues to the compressor 19. Acoustic waves may pass in the reverse direction along the airflow path from the engine 20 towards the air filter 21. Sources of noise are the engine 20 and the compressor 19. The acoustic waves have a range of frequencies.
An embodiment of the damper apparatus 30 is shown in Figure 3 (side view) and Figure 4 (cross-section). The damper apparatus 30 has an outer housing 39 in the form of a hollow tube. A tubular cylindrical cage 34 is provided within the housing 39. The cage 34 is coaxial with the housing 39. A longitudinal airflow passageway 33 is defined through the interior of the cage 34. Figure 5 shows the cage 34 removed from the damper apparatus 30.
The cage 34 can be in the form of a nylon grid structure, with apertures of the grid being rectangular in shape. An example diameter of the cage 34 is around 65mm. An example size of the apertures is around 18mm by 35mm. Other sizes and shapes of aperture are possible. The cage 34 may be connected to a collar 38 at one end. The collar 38 allow the cage 34 to be fitted or removed from an interior of the damper apparatus 30. A layer of gauze 35 may be provided around an outer surface of the cage 34. The gauze 35 may be formed of a material such as nylon, steel, stainless steel or another material.
The annular volume defined between the cage 34 and housing 39 comprises a quantity of porous granular material 40. The porous granular material 40 may be contained within a bag having a cylindrical inner layer/side 36, a cylindrical outer layer/side 37 and radially-extending ends. The bag encloses an annular volume. For clarity, Figure 4 shows a small gap between the bag 36 and the cage 34/gauze 35 but the bag may press directly against the cage 34/gauze 35. The bag 36, 37 is formed of an acoustically-transparent material. The term “acoustically transparent material” means the material is substantially transparent to acoustic waves, i.e. it has no substantial sound-deadening properties. Acoustic waves/energy passes through the acoustically transparent material to the porous granular material 40.
In some embodiments, it is possible to omit the gauze 35, and the porous granular material 40 is contained by a combination of the bag 36 and the cage 34 without the gauze 35.
Figure 4 shows a continuous band of porous granular material 40 all the way around the passageway 33. In other embodiments, it is possible to provide a variable thickness of granular material 40 around the passageway 33. For example, there may be a first thickness of granular material 40 at one or more angular positions around the passageway 33 and a second thickness of granular material 40 at one or more different angular positions around the passageway 33. The bag 36, 37 may be configured to define regions of different thickness around the passageway 33.
Figure 4 shows porous granular material 40 completely filling the annular volume between the cage 34 (or gauze 35, if present) and the interior of the housing 39. In other embodiments, the porous granular material 40 may only partially occupy the annular volume between the cage 34 (or gauze 35, if present) and the interior of the housing 39.
Containing the granular material 40 within a bag 36, 37 allows easier fitting and/or replacement of the granular material 40. An alternative to providing a bag 36, 37 is to only provide an inner layer 36 adjacent the cage 34 (and gauze 35, if present) to retain the granular material 40 and to loose fill the volume between the inner layer 36 and the housing 39 with a quantity of granular material 40. In each case the inner layer 36 helps to prevent unwanted particles passing from the granular material 40 to the passageway 33 and entering the engine.
Acoustic waves will pass along the passageway 33, through the apertures of cage 34, the gauze 35 (if present) and through the inner layer 36 of the bag, and into the porous granular material 40. The porous granular material 40 can attenuate a portion of the acoustic energy. That is, the damper provides a transmission loss to acoustic energy. It is desirable that the transmission loss is as high as possible in frequency bands which are known to produce noise. In a non-limiting example, the porous granular material 40 can attenuate a portion of the acoustic energy in at least part of the frequency range 800Hz - 2.5 KHz. The porous granular material 40 may attenuate a portion of the acoustic energy in a broader frequency range.
The porous granular material 40 is a multi-scale porous granular material. These materials have a very large surface area, with a high number of pores or channels. The porous granular material 40 can be activated carbon granules. Figure 6 illustrates a multi-scale porous granular material which has two scales of porosity. The granular material 40 is shown at three scales of magnification: macroscopic scale; mesoscopic scale; and microscopic scale. At the macroscopic scale, granules are packed within an area/volume. The granules have a distribution of sizes and shapes. When part of this area is viewed at the mesoscopic scale, it can be seen that there are granules 41 separated by pores/voids 42. This is one scale of porosity. The granules 41 themselves comprise micro-porous regions. When one of the micro-porous regions 41 is viewed at the microscopic scale, it comprises a porous structure, with solid structures 43 and micro-pores 44. This is another scale of porosity. The porous structure at different levels of scale has been found to provide a high level of attenuation of acoustic energy. A multi-scale porous granular material may have a further scale of porosity. The solids 43 at the mesoscopic scale may be nano-porous regions. That is, when viewed at a nanoscopic scale, regions 43 are nano-porous regions 43 comprising solid structures and nano-pores. A further function of the porous granular material 40 is that it can trap hydrocarbons (HC). The granular material may trap HCs by sorption, e.g. by adsorption. In use, when the vehicle is parked with the engine off, it is possible that a small amount of unburned fuel may vaporise and escape from the engine 15 via the airflow path through the air induction apparatus 20. The fuel is released in the form of trace amounts of hydrocarbon (HC) vapours. With the regulations regarding vehicle emissions becoming increasingly strict, such escape of the HC vapours is undesirable.
Referring again to Figure 2, when the engine 15 is turned off, HC vapours may flow from the engine 15 along conduit 26. As the HC vapours pass through the passageway 33 of the damper apparatus 30, hydrocarbons from the HC vapours are adsorbed by the porous granular material 40. When the engine of the vehicle is restarted, the flow of induction air through the damper apparatus 30 causes hydrocarbons trapped by the granular material 40 to be released and drawn into the engine to be combusted. In some arrangements the hydrocarbon molecules are weakly bonded electrostatically to the granular material 40, the flow of induction air causing the bonds between the molecules and granular material 40 to be broken.
Embodiments of the invention have the advantage that a flow-past hydrocarbon trap may be conveniently provided in an existing component of a motor vehicle air induction apparatus 30 without a requirement to provide a separately packaged hydrocarbon trapping medium. The trapping medium is the granular material 40 and does not reduce a diameter of an air flow passageway through the damper apparatus 30. Because the granular material 40 provides a flow-past filter (rather than a flow-through filter) a backpressure on induction air flowing through the apparatus is substantially unaffected by the presence of the trapping medium.
Some embodiments of the invention have the advantage that incorporation of the hydrocarbon trapping medium in the induction air system does not reduce significantly a vehicle assembly time. In some embodiments incorporation of the hydrocarbon trapping medium does not cause substantially any package space reductions within the engine bay since the trapping medium is incorporated into an existing component.
Throughout the description and claims of this specification, the words “comprise” and “contain” and variations of the words, for example “comprising” and “comprises”, means “including but not limited to”, and is not intended to (and does not) exclude other moieties, additives, components, integers or steps.
Throughout the description and claims of this specification, the singular encompasses the plural unless the context otherwise requires. In particular, where the indefinite article is used, the specification is to be understood as contemplating plurality as well as singularity, unless the context requires otherwise.
Features, integers, characteristics, compounds, chemical moieties or groups described in conjunction with a particular aspect, embodiment or example of the invention are to be understood to be applicable to any other aspect, embodiment or example described herein unless incompatible therewith.
Claims (14)
1. A damper apparatus for an air induction system of a motor vehicle, the apparatus comprising: a housing; a passageway through the housing through which induction air may be drawn to an engine of the vehicle; and a quantity of porous granular material provided around the passageway between the passageway and the housing, wherein the porous granular material provides an acoustic damping function on acoustic vibrations in the induction air and also provides a flow-past hydrocarbon trapping function on hydrocarbon vapours entering the passageway from the engine, wherein the porous granular material is a multi-scale porous granular material.
2. A damper apparatus according to claim 1 wherein the porous granular material is activated carbon.
3. A damper apparatus according to any one of the preceding claims comprising a tubular cage within the housing which is configured to define the passageway through the apparatus, the tubular cage having a plurality of windows or apertures defined in it, and wherein the porous granular material is disposed between the housing and the tubular cage.
4. A damper apparatus according to claim 3 wherein the housing and the tubular cage are substantially cylindrical in shape, the housing and tubular cage being substantially coaxial.
5. A damper apparatus according to claim 3 or 4 comprising a retaining layer between the tubular cage and the porous granular material.
6. A damper apparatus according to claim 5 wherein the retaining layer is formed of a material which is acoustically transparent and which is porous to hydrocarbons.
7. A damper apparatus according to any one of the preceding claims comprising a bag which contains the porous granular material.
8. A damper apparatus according to claim 7 wherein the bag has an inner side, an outer side and radial ends and encloses an annular volume.
9. A damper apparatus according to any one of claims 7 or 8 wherein at least the inner side of the bag is formed of a material which is acoustically transparent and which is porous to hydrocarbons.
10. A damper apparatus according to any one of the preceding claims wherein the porous granular material is arranged to release trapped hydrocarbons to airflow through the passageway when induction air is drawn through the damper apparatus during normal engine operation.
11. An air induction system for a motor vehicle comprising a damper apparatus according to any one of the preceding claims.
12. A motor vehicle comprising an air induction system according to claim 11.
13. A method comprising: providing a damper apparatus in an air induction system of a motor vehicle, the damper apparatus comprising a housing, a passageway and a quantity of porous granular material provided around the passageway between the passageway and the housing, wherein the porous granular material is a multi-scale porous granular material; when an engine of the motor vehicle is switched on, drawing air through the damper apparatus and using the quantity of multi-scale porous granular material to attenuate acoustic vibrations in the induction air; when an engine of the motor vehicle is switched off, using the quantity of multi-scale porous granular material to trap hydrocarbons from hydrocarbon vapours flowing through the passageway.
14. A method according to claim 13 comprising, when an engine of the motor vehicle is switched on, releasing trapped hydrocarbons to airflow through the passageway.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1617346.0A GB2554900B (en) | 2016-10-13 | 2016-10-13 | Motor vehicle air induction damper apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1617346.0A GB2554900B (en) | 2016-10-13 | 2016-10-13 | Motor vehicle air induction damper apparatus |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB201617346D0 GB201617346D0 (en) | 2016-11-30 |
| GB2554900A GB2554900A (en) | 2018-04-18 |
| GB2554900B true GB2554900B (en) | 2019-06-26 |
Family
ID=57680712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1617346.0A Active GB2554900B (en) | 2016-10-13 | 2016-10-13 | Motor vehicle air induction damper apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2554900B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111322183A (en) * | 2018-12-14 | 2020-06-23 | 马勒国际有限公司 | Hydrocarbon absorber on a high-frequency resonator |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021119960A1 (en) | 2020-08-14 | 2022-02-17 | Mann+Hummel Gmbh | Air duct of an internal combustion engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070278034A1 (en) * | 2006-05-30 | 2007-12-06 | Toyota Boshoku Kabushiki Kaisha | Duct and process for producing the same |
| EP2249020A1 (en) * | 2008-03-04 | 2010-11-10 | Tokyo Roki Co., Ltd. | Muffling structure of vent pipe and muffling structure of case |
| US20120222641A1 (en) * | 2011-03-04 | 2012-09-06 | Gm Global Technology Operations Llc. | Air duct assembly for engine |
| WO2012152894A1 (en) * | 2011-05-12 | 2012-11-15 | Jaguar Cars Ltd. | Motor vehicle hydrocarbon trap and method |
| US20120304629A1 (en) * | 2011-06-06 | 2012-12-06 | Mann+Hummel Gmbh | Adsorption Unit and Absorption Muffler of an Intake Manifold of an Internal Combustion Engine |
| US20150369183A1 (en) * | 2012-03-02 | 2015-12-24 | Ford Global Technologies, Llc | Induction system including a passive-adsorption hydrocarbon trap |
-
2016
- 2016-10-13 GB GB1617346.0A patent/GB2554900B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070278034A1 (en) * | 2006-05-30 | 2007-12-06 | Toyota Boshoku Kabushiki Kaisha | Duct and process for producing the same |
| EP2249020A1 (en) * | 2008-03-04 | 2010-11-10 | Tokyo Roki Co., Ltd. | Muffling structure of vent pipe and muffling structure of case |
| US20120222641A1 (en) * | 2011-03-04 | 2012-09-06 | Gm Global Technology Operations Llc. | Air duct assembly for engine |
| WO2012152894A1 (en) * | 2011-05-12 | 2012-11-15 | Jaguar Cars Ltd. | Motor vehicle hydrocarbon trap and method |
| US20120304629A1 (en) * | 2011-06-06 | 2012-12-06 | Mann+Hummel Gmbh | Adsorption Unit and Absorption Muffler of an Intake Manifold of an Internal Combustion Engine |
| US20150369183A1 (en) * | 2012-03-02 | 2015-12-24 | Ford Global Technologies, Llc | Induction system including a passive-adsorption hydrocarbon trap |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111322183A (en) * | 2018-12-14 | 2020-06-23 | 马勒国际有限公司 | Hydrocarbon absorber on a high-frequency resonator |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2554900A (en) | 2018-04-18 |
| GB201617346D0 (en) | 2016-11-30 |
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| 746 | Register noted 'licences of right' (sect. 46/1977) |
Effective date: 20200428 |