EP2156033A1 - A device for reducing noise from a motor vehicle and a vehicle provide with the same - Google Patents
A device for reducing noise from a motor vehicle and a vehicle provide with the sameInfo
- Publication number
- EP2156033A1 EP2156033A1 EP08767144A EP08767144A EP2156033A1 EP 2156033 A1 EP2156033 A1 EP 2156033A1 EP 08767144 A EP08767144 A EP 08767144A EP 08767144 A EP08767144 A EP 08767144A EP 2156033 A1 EP2156033 A1 EP 2156033A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling air
- air duct
- noise
- engine
- vehicle
- 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.)
- Withdrawn
Links
- 238000001816 cooling Methods 0.000 claims abstract description 64
- 238000013016 damping Methods 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 11
- 238000002485 combustion reaction Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 6
- 239000011358 absorbing material Substances 0.000 description 5
- 230000003584 silencer Effects 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K11/00—Arrangement in connection with cooling of propulsion units
- B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
- B60K11/04—Arrangement or mounting of radiators, radiator shutters, or radiator blinds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/11—Thermal or acoustic insulation
- F02B77/13—Acoustic insulation
Definitions
- the present invention relates to a device for damping of noise from a motor vehicle, particularly a heavy vehicle such as a bus or truck, with an engine arranged in an engine space and at least one cooling air duct arranged close thereto.
- the invention also relates to a vehicle provided with a device for damping of noise.
- Noise means sounds generated by the vehicle's engine or such items belonging to it as the exhaust system, cooling system etc., which noise it is desirable to eliminate or at least minimise.
- the vehicle's engine may be a combustion engine, a fuel cell system or some other similar drive system.
- That invention does not affect, nor is it intended to affect, the level of noise from the vehicle and its exhaust system.
- patent EP0648924 applied for Denyo Kabushiki Kaisha refers to a noise-damping device for a water-cooled engine coupled to a generator.
- the engine, the generator and the engine's silencer are arranged within a sound-damping casing provided with an inlet and an outlet for air.
- the exhaust system is situated inside the casing and its outlet orifice is directed towards, and ends immediately below, the outlet grille of the sound-damping casing.
- the object of this configuration is to damp noise from the engine, generator and exhaust system of a stationary installation.
- the outlet pipe for exhaust gases is therefore directed upwards and outwards and ends quite close to the outlet grille. This location results in only marginal damping of noise from outflowing exhaust gases.
- the object of the present invention is to solve said problem and provide a device for damping the noise of a vehicle, which device has few parts, is inexpensive to manufacture and fit, is easy to maintain and occupies a minimum amount of extra space in the vehicle.
- a particular object is to damp noise generated by the engine or components associated with it such as the exhaust system, cooling system etc.
- Figure 1 depicts a perspective view as seen obliquely from behind of a combustion engine provided with a normal silencer and a cooling air duct for damping of noise from the vehicle's combustion engine.
- Figure 2 depicts a perspective view of the system according to Figure 1 but from the other side of the engine.
- Figure 3 depicts a cross-section through a cooling air duct modified according to the invention for damping of noise from the vehicle's combustion engine.
- Figure 4 depicts the cooling air duct's outlets situated on the vehicle's roof.
- Figure 1 depicts a perspective view as seen obliquely from behind of a combustion engine 1 , preferably for a heavy motor vehicle such as a bus or truck.
- the diagram also depicts a normally provided exhaust system 2 comprising first and second exhaust pipes 3, 4 and a silencer 5.
- the engine installation is also provided with a noise- insulating cooling air duct 6 with a grilled inlet 7 and a grilled outlet 8.
- FIG 2 depicts a perspective view as seen obliquely from behind of the system depicted in Figure 1 but from the other side of the engine 1.
- This diagram shows somewhat more clearly the configuration of the cooling air duct 6.
- Cold air is drawn in via the inlet 7, passes through the cooling air duct 6 and is blown out via the outlet 8.
- FIG. 3 depicts a cross-section through a cooling air duct 6 modified according to the invention for damping of noise from the vehicle.
- the cooling air duct 6 is entirely separated/demarcated from the engine 1 and its engine space (not depicted) and constitutes an airflow demarcated from the engine space.
- the main advantage of this is that engine noise but also noise from other units and devices on and around the engine (e.g. a mechanical air conditioning compressor (not depicted), cooling fan 9 etc.) does not make its way out via the cooling air duct 6 or the cooling element 10.
- the fact that the cooling air warmed via the cooling element 10 does not enter the engine space means that the engine space temperature is also kept down, which is important, e.g. for the service life of electronics and control units etc. situated therein. Ventilation of the engine space is nevertheless still required and may be provided by a separate cooling system (not depicted). It may for example be provided by separate fans which cool a so-called low-temperature cooling circuit intended to cool, for example, electrical components. This cooling air is thereafter led, for example, down towards the ground via apertures in the floor of the engine space. These apertures towards the ground may also be provided with noise damping.
- a further advantage is that the orifices of the cooling air duct 6, the inlet and outlet 7, 8 respectively, may be situated on the roof of the vehicle, see Figure 4. This is to prevent noise towards the sides of the vehicle, with consequent benefit to other road users and persons in the immediate vicinity, e.g. on sidewalks, at bus stops etc. Baffles or grilles on the vehicle's roof guide the noise from the cooling air duct 6 forwards and rearwards respectively so that no one who is above the vehicle, e.g. several floors up in adjacent buildings, should be disturbed.
- Cold air is with advantage taken in from in front, in the direction of movement of the vehicle, and warm air which has passed through the cooling air duct 6 is discharged rearwards to prevent "cycling" in the cooling system, i.e. to prevent the same warm air from circulating through the cooling air duct 6 more than once.
- the cooling air duct 6 may be made of aluminium, sheet metal, plastic or the like. At least one cooling fan 9 and one cooling element 10 are arranged in the cooling air duct 6. The cooling fan 9 is preferably situated downstream but may also be situated upstream (not depicted) of the cooling element 10. The whole or part of the inside of the cooling air duct 6 is lined with an absorbent, a sound-damping material 11, and is therefore noise-damping.
- the sound-absorbing material 11 may be a commercially available damping material.
- the cooling air duct 6 is also configured to damp noise arising from the actual cooling fan 9.
- the cooling air duct 6 is also configured with at least one, preferably two or more, angled sections 12a, b, c or bends, each preferably 60-90 degrees, resulting in a winding duct shape which causes air flows and sound waves to rebound and change direction. The result is that a substantial portion of the unwanted noise is directed towards some of the insides of the cooling air duct and towards the sound-absorbing material 11 and is damped. Fan noise or noise from the engine's exhaust gases is thus prevented from radiating directly out to the surroundings of the vehicle.
- the cooling air duct 6 is also separated/screened from the engine 1 and the engine space, further preventing direct noise from the engine 1 from leaking out to the surroundings via the cooling air duct 6.
- the sound-absorbing material 11 comprises perforated aluminium specially made, fitted and tuned to the noise which is intended to be damped. This involves taking into account the structural configuration of the cooling air duct 6 and the material which the cooling air duct 6 is made of.
- the exhaust gases from the engine 1 are led via the first pipe 3 of the exhaust system 2 to the silencer 5 in which part of the exhaust noise of the engine 1 is damped out.
- the exhaust gases are thereafter led via a second pipe 4 into the cooling air duct 6, preferably downstream of the cooling package 10 and the fan 9.
- the exhaust gases are preferably led into the cooling air duct 6 substantially transversely to the main airflow in the cooling air duct 6.
- the noise thus encounters the sound-absorbing material 11 in the cooling air duct 6 and is damped.
- the same also happens to noise from, for example, the cooling fan 9. Substantially all the noise is thus directed towards a surface provided with damping material and has no "direct exit" from the cooling air duct 6.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Exhaust Silencers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0701195A SE531146C2 (en) | 2007-05-15 | 2007-05-15 | An apparatus for attenuating noise from a motor vehicle and a vehicle fitted therewith |
PCT/SE2008/050533 WO2008140408A1 (en) | 2007-05-15 | 2008-05-09 | A device for reducing noise from a motor vehicle and a vehicle provide with the same |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2156033A1 true EP2156033A1 (en) | 2010-02-24 |
EP2156033A4 EP2156033A4 (en) | 2011-06-29 |
Family
ID=40002468
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08767144A Withdrawn EP2156033A4 (en) | 2007-05-15 | 2008-05-09 | A device for reducing noise from a motor vehicle and a vehicle provide with the same |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2156033A4 (en) |
SE (1) | SE531146C2 (en) |
WO (1) | WO2008140408A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB831597A (en) * | 1955-03-23 | 1960-03-30 | John Philipp Milford Reid | Improvements in cooling systems for motor vehicles |
GB1338300A (en) * | 1972-08-22 | 1973-11-21 | Rolls Royce Motors Ltd | Road vehicles |
DE2530743A1 (en) * | 1975-07-10 | 1977-01-13 | Sueddeutsche Kuehler Behr | LOW-NOISE COOLING SYSTEM, IN PARTICULAR FOR TRUCKS |
DE8006786U1 (en) * | 1979-03-13 | 1980-06-19 | Aveling Barford Ltd., Grantham, Lincolnshire (Ver. Koenigreich) | MOTORIZED CONSTRUCTION VEHICLE |
GB2060523A (en) * | 1979-10-10 | 1981-05-07 | Sueddeutsche Kuehler Behr | Motor vehicle particularly o lorry with a cooling system for a combustion engine |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1208482A (en) * | 1958-06-13 | 1960-02-24 | Improvements made to the means for soundproofing groups comprising at least one heat engine and in particular generating sets | |
US3642092A (en) * | 1968-12-10 | 1972-02-15 | Jerzy Henryk Cederbaum | Noiseless soft-running power plant |
SE369543B (en) * | 1973-08-27 | 1974-09-02 | Atlas Copco Ab | |
JPS63131822A (en) * | 1986-11-20 | 1988-06-03 | Kawasaki Heavy Ind Ltd | Cooling device for water-cooled engine |
SE514268C2 (en) * | 1998-12-04 | 2001-01-29 | Haegglunds Vehicle Ab | Exhaust emissions with low IR signature |
-
2007
- 2007-05-15 SE SE0701195A patent/SE531146C2/en unknown
-
2008
- 2008-05-09 EP EP08767144A patent/EP2156033A4/en not_active Withdrawn
- 2008-05-09 WO PCT/SE2008/050533 patent/WO2008140408A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB831597A (en) * | 1955-03-23 | 1960-03-30 | John Philipp Milford Reid | Improvements in cooling systems for motor vehicles |
GB1338300A (en) * | 1972-08-22 | 1973-11-21 | Rolls Royce Motors Ltd | Road vehicles |
DE2530743A1 (en) * | 1975-07-10 | 1977-01-13 | Sueddeutsche Kuehler Behr | LOW-NOISE COOLING SYSTEM, IN PARTICULAR FOR TRUCKS |
DE8006786U1 (en) * | 1979-03-13 | 1980-06-19 | Aveling Barford Ltd., Grantham, Lincolnshire (Ver. Koenigreich) | MOTORIZED CONSTRUCTION VEHICLE |
GB2060523A (en) * | 1979-10-10 | 1981-05-07 | Sueddeutsche Kuehler Behr | Motor vehicle particularly o lorry with a cooling system for a combustion engine |
Non-Patent Citations (1)
Title |
---|
See also references of WO2008140408A1 * |
Also Published As
Publication number | Publication date |
---|---|
SE0701195L (en) | 2008-11-16 |
WO2008140408A1 (en) | 2008-11-20 |
SE531146C2 (en) | 2009-01-07 |
EP2156033A4 (en) | 2011-06-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20091215 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL BA MK RS |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: HENRYSON, KJELL Inventor name: FOLKESSON, ANDERS Inventor name: OHLSSON, JOHAN |
|
DAX | Request for extension of the european patent (deleted) | ||
A4 | Supplementary search report drawn up and despatched |
Effective date: 20110531 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
18W | Application withdrawn |
Effective date: 20160831 |