GB2352492A - A device for fixing a baffle to an engine - Google Patents

A device for fixing a baffle to an engine Download PDF

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Publication number
GB2352492A
GB2352492A GB0018244A GB0018244A GB2352492A GB 2352492 A GB2352492 A GB 2352492A GB 0018244 A GB0018244 A GB 0018244A GB 0018244 A GB0018244 A GB 0018244A GB 2352492 A GB2352492 A GB 2352492A
Authority
GB
United Kingdom
Prior art keywords
baffle
base
aperture
engine
head
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
Application number
GB0018244A
Other versions
GB2352492B (en
GB0018244D0 (en
Inventor
Guillaume Grignon
Franck Fritsch
Jean-Luc Lanfranchini
Oliver Vitrant
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Centre dEtude et de Recherche pour lAutomobile CERA
Original Assignee
Centre dEtude et de Recherche pour lAutomobile CERA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Centre dEtude et de Recherche pour lAutomobile CERA filed Critical Centre dEtude et de Recherche pour lAutomobile CERA
Publication of GB0018244D0 publication Critical patent/GB0018244D0/en
Publication of GB2352492A publication Critical patent/GB2352492A/en
Application granted granted Critical
Publication of GB2352492B publication Critical patent/GB2352492B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
    • F02M35/10144—Connections of intake ducts to each other or to another device
    • 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
    • F02M35/10—Air intakes; Induction systems
    • F02M35/1034—Manufacturing and assembling intake systems
    • F02M35/10354—Joining multiple sections together
    • F02M35/1036—Joining multiple sections together by welding, bonding or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
    • F16B21/06—Releasable fastening devices with snap-action
    • F16B21/07—Releasable fastening devices with snap-action in which the socket has a resilient part
    • F16B21/073—Releasable fastening devices with snap-action in which the socket has a resilient part the socket having a resilient part on its inside
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/373—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by having a particular shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
    • F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08—Insulating elements, e.g. for sound insulation
    • B60R13/0838—Insulating elements, e.g. for sound insulation for engine compartments
    • 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

Abstract

The invention relates to a device for fixing a baffle (16) to the top of an engine. This device comprises a receiving head (1) forming a housing (5) to receive the head (23) of a mounting rod (22) attached to the engine, a base (3) comprising means (12-14) for receiving the baffle, and a bellows (2) between the receiving head and the base, the device being made of an elastic synthetic material. The head can form one wall (4) of the housing, this wall defining a first aperture (7) connecting the housing with one end of the interior (8) of the bellows (2), the other end of the interior of the bellows comprising a second aperture (11) connecting the interior of the bellows with the exterior at the base (3).

Description

2352492 DEVICE FOR FIXING A BAFFLE TO AN ENGINE The present invention
relates to a device for fixing a baffle to an engine and more particularly to the top part of such an engine. It finds its application in particular in the field of acoustic baffles, but also in that of baffles of the type known as "structure covers".
Such acoustic baffles are known, which are fixed to the top part of engines to reduce noise, in particular in the case of direct-injection diesel engines. However, such baffles can also be used on other engines, for example on petrol engines, or even on electric motors.
These acoustic baffles are mainly used on light motor vehicles, but can also be used on heavy goods vehicles or agricultural tractors, or even on motors not intended for vehicles.
The known acoustic baffles are fixed to the top of the engine so as to prevent the upward propagation of noise. However, because the baffles are fixed to the engine, they are subject to the engine's vibrations. It is thus essential that the means for fixing the baffle to the engine should insulate the vibrations so that the baffle is not itself a source of noise.
The largest engine vibrations are those which correspond to the second-order component of the rotation of the engine (harmonic 2). These critical frequencies thus range from about 25 Hertz for an engine idling at 750 rpm, to 200 Hertz for a speed of 6000 rpm. It is thus important that the devices for fixing the acoustic baffle to the engine should have intrinsic frequencies of less than 25 Hertz and preferably less than 20 Hertz.
The present invention is directed towards providing such devices.
More particularly, the present invention is directed towards providing a device for fixing a baffle to an engine which allows optimized uncoupling and which is simple and inexpensive to manufacture.
The present invention is also directed towards providing an assembly for fixing a baffle comprising 5 such a device.
To this end, a subject of the invention is firstly a device for fixing a baffle to the top part of an engine, characterized in that it comprises a receiving head forming a housing to receive the head of a mounting rod attached to the engine, a base comprising means for receiving the said baffle and a bellows between the said receiving head and the said base, the said device being made of an elastic synthetic material.
In one particular embodiment, the said head forms one wall of the said housing, the said wall defining a first aperture connecting the said housing with one end of the interior of the said bellows, the other end of the interior of the said bellows comprising a second aperture connecting the interior of the said bellows with the exterior at the said base.
More particularly, the said wall can form, at the said first aperture, a collar capable of retaining a complementary collar of the said head of the mounting rod.
Also in one particular embodiment, the said bellows is formed from two cone frustums placed together via their large base.
The said head can also comprise a limit stop at its exterior to engage with the said baffle.
The said means for receiving the said baffle can also comprise a circular groove made in the said base and arranged to receive the edge of an aperture provided in the said baffle.
The said base can form a cone frustum flared from the said second aperture.
The subject of the invention is also an assembly f or f ixing a baf f le to the top part of an engine, characterized in that it comprises a mounting rod attached tb the said engine, f ixing means attached to the said baf f le and a device as described above. More particularly, the head of the said rod for this fixing assembly can be of enlarged diameter. 5 The abovementioned fixing means can include a caliper mounted a certain distance below the said baffle. More particularly, the said caliper can include an aperture having an edge arranged to engage with the said base of the said device.
More particularly, the said aperture can have a slot for introducing the said base.
It will be understood that the device according to the invention and the assembly comprising it can be produced simply and that no complex operation is involved in assembling them. In addition, the fixing assembly is located entirely under the baffle which hides it from view. It therefore does not detract from the aesthetic appearance of the engine. 20 one particular embodiment of the invention will now be described, by way of non-limiting example, with reference to the attached diagrammatic drawings, in which: - Figure I is a side view of a f ixing device according to the invention; - Figure 2 is a bottom view of a caliper for mounting an acoustic baffle; - Figure 3 is a view in cross section along the line III-III of Figure 2; - Figure 4 is a side view of a fixing rod which can engage with the device according to the invention; and - Figure 5 is a view in axial cross section of a fixing assembly according to the invention.
The device in Figure 1 generally comprises a receiving head 1, a connecting bellows 2 and a base 3.
The receiving head 1 is formed from a wall 4 defining a housing 5. The wall 4 is narrowed at the bottom to form a collar 6 facing upwards and partially closing off an aperture 7 connecting the interior of the housing 5 with the interior 8 of the bellows 2.
The receiving head I also has a limit stop I at the top which is designed to dampen the contact between the device and the acoustic baffle when the bellows 2 is flattened.
The bellows 2 consists of two cone frustums 9 and 10 placed together via their large bases.
The small base of the upper cone frustum 9 faces upwards and constitutes the connection with the aperture 7 of the housing 5. The small base of the lower cone frustum 10 faces downwards and forms an aperture 11 connecting the interior 8 of the bellows 2 with the exterior. 15 The base 3 forms two circular external flanges, perpendicular to the axis of the device, i.e. a flange 12 at the aperture 11 and a bottom f lange 13 below the f lange 12. The two f langes 12 and 13 together f orm a circular groove 14. 20 The base 3 moreover forms a cone frustum 15 flared towards the bottom and outwards to facilitate the introduction of the fixing rod which will be described below. The device which has just been described is arranged to make the connection between the top part of an engine (not shown) and an acoustic baffle 16.
This baffle can be one-piece moulded with fixing means 17 arranged to receive the abovementioned device.
In the present case, the fixing means 17 comprise two walls 18 substantially perpendicular to the baffle 16, and a wall 19 connected to the walls 18 at a certain distance from the baffle 16 and substantially parallel to this baffle. The thickness of the wall 19 is substantially equal to the distance between the flanges 12 and 13.
The wall 19 has a central aperture 20 connecting with one edge of the wall via a slot 21.
A rod 22 is mounted by any suitable means attached to the top of the engine with which the acoustic baffle 16 is combined. The top of the rod 22 has a head 23 whose diameter is larger than that of the rod, thus forming between this head and the rod 22 a collar 24 facing downwards.
The acoustic baffle 16 is thus mounted on the engine in the following way.
Firstly, a plurality of mounting devices, such as that of Figure 1, are installed under the acoustic baffle 16. To this end, their base is compressed so that the circular groove 13 can be introduced into the slot 21 and so that the edge of the aperture 20 sits in the circular groove 14. 15 The baffle fitted with these connecting devices is then placed over the engine, on which are mounted rods 22 corresponding in number and position to the connecting devices. The baffle 16 is then lowered so as to engage 20 the heads 23 of the rods 22 in the housings 5 through the interior 8 of the bellows 2. The cones 15 of the bases 3 allow the baffle 16 to be centred easily. A person skilled in the art will know how to size the various parts of the device according to the invention, and in particular the connecting bellows 2, and how to select a material of suitable rigidity to produce this device, so as to obtain the desired intrinsic frequency which, generally, will have to be below a predetermined value.

Claims (12)

1 Device for fixing a baffle (16) to the top of an engine, characterized in that it comprises a receiving head (1) forming a housing (5) to receive the head (23) of a mounting rod (22) attached to the engine, a base (3) comprising means (12- 14) for receiving the said baffle, and a bellows (2) between the said receiving head and the said base, the said device being made of an elastic synthetic material.
2. Device according to Claim 1, in which the said head forms one wall (4) of the said housing, the said wall defining a first aperture (7) connecting the said housing with one end of the interior (8) of the said bellows (2), the other end of the interior of the said bellows comprising a second aperture (11) connecting the interior of the said bellows with the exterior at the said base (3).
3. Device according to Claim 3, in which the said wall (4) forms, at the said first aperture (7),a collar (6) capable of retaining a complementary collar (24) of the said head (23) of the mounting rod.
4. Device according to any one of Claims 1 to 3, in which the said bellows (2) is formed from two cone frustums (9, 10) placed together via their large base.
5. Device according to any one of Claims 1 to 4, in which the said head (1) also comprises a limit stop (11) at its exterior to engage with the said baffle (16).
6. Device according to any one of Claims 1 to 5, in which the said means (12-14) for receiving the baffle comprise a circular groove (14) made in the said base (3) arranged to receive the edge of an aperture (20) provided in the said acoustic baffle.
7. Device according to any one of Claims 1 to 6, in which the said base (3) forms a cone frustum flared from the said second aperture (11).
8. Assembly f or f ixing a baf f le to the top of an engine, characterized in that it comprises a mounting rod (22) attached to the said engine, f ixing means (17) attached to the said baf f le and a device according to any one of Claims 1 to 7.
9. Fixing assembly according to Claim 8, in which 5 the said rod comprises a head (23) of enlarged diameter.
10. Fixing assembly according to either of Claims 8 and 9, in which the said fixing means comprise a caliper (19) mounted a certain distance below the said baffle.
11. Fixing assembly according to any one of Claims 8 to 10, in which the said caliper includes an aperture (20) having an edge arranged to engage with the said base (3) of the said device.
12. Fixing assembly according to any one of Claims 8 to 11, in which the said aperture (20) includes a slot (21) for introducing the said base (3).
GB0018244A 1999-07-26 2000-07-25 Device for fixing a baffle to an engine Expired - Fee Related GB2352492B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9909662A FR2796998B1 (en) 1999-07-26 1999-07-26 DEVICE FOR FIXING AN ACOUSTIC SCREEN ON A MOTOR

Publications (3)

Publication Number Publication Date
GB0018244D0 GB0018244D0 (en) 2000-09-13
GB2352492A true GB2352492A (en) 2001-01-31
GB2352492B GB2352492B (en) 2003-02-12

Family

ID=9548503

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0018244A Expired - Fee Related GB2352492B (en) 1999-07-26 2000-07-25 Device for fixing a baffle to an engine

Country Status (3)

Country Link
DE (1) DE10036429A1 (en)
FR (1) FR2796998B1 (en)
GB (1) GB2352492B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2836526A1 (en) * 2002-02-27 2003-08-29 Cera Fixing and vibration decoupling device for automobile acoustic screen comprises flexible piece with connections to first element and rigid piece connected to flexible piece with housing for mounting rod
JP2005290996A (en) * 2004-03-31 2005-10-20 Toyoda Gosei Co Ltd Installation structure for engine cover
US7168879B2 (en) * 2002-10-31 2007-01-30 Bollhoff Gmbh Plug-in coupling allowing for compensating movements
WO2016166198A1 (en) * 2015-04-15 2016-10-20 Autoneum Management Ag Snap-in mounting for mounting an engine top cover
WO2020098867A1 (en) * 2018-11-14 2020-05-22 Kiekert Ag Bearing for fastening a component in a motor vehicle

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10314220C5 (en) * 2003-03-28 2009-09-10 Woco Industrietechnik Gmbh Cover for at least one component in an engine compartment of a motor vehicle
DE10317305B4 (en) * 2003-04-14 2006-04-13 Carcoustics Tech Center Gmbh Cover for an aggregate in the engine compartment of a motor vehicle
FR2853942B3 (en) * 2003-04-16 2007-08-24 Amkey Mgt SCREEN FIXING DEVICE FOR MOTOR VEHICLE
FR2857065B1 (en) * 2003-04-16 2006-08-04 Mecaplast Sa DEVICE FOR COUPLING BY EMBOITELY BETWEEN TWO ELEMENTS.
FR2906322B1 (en) 2006-09-27 2010-10-22 Cera ELASTIC FIXING DEVICE COMPRISING A DEFORMABLE RING
DE202006017798U1 (en) * 2006-11-22 2007-02-01 Böllhoff Verbindungstechnik GmbH Vibration-free ball unit, for a ball and socket coupling, has a holder with a vibration decoupler section attached to an insert

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4921371A (en) * 1988-02-26 1990-05-01 Valeo Vibration resistant securing means, especially for securing a brush carrier plate to a bearing carrier plate of an electric motor
US5823514A (en) * 1995-02-07 1998-10-20 Mercedes-Benz Ag Vibration dampening mounting arrangement for supporting a component on an internal combustion engine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS587851B2 (en) * 1977-02-05 1983-02-12 株式会社ニフコ Fastener
DE19526934A1 (en) * 1995-07-24 1997-01-30 Mann & Hummel Filter Fastener
DE19701365B4 (en) * 1997-01-16 2004-05-06 Volkswagen Ag Device for releasably attaching a component to a carrier
EP0902198B1 (en) * 1997-09-12 2003-04-02 Böllhoff GmbH Plug connector

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4921371A (en) * 1988-02-26 1990-05-01 Valeo Vibration resistant securing means, especially for securing a brush carrier plate to a bearing carrier plate of an electric motor
US5823514A (en) * 1995-02-07 1998-10-20 Mercedes-Benz Ag Vibration dampening mounting arrangement for supporting a component on an internal combustion engine

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2836526A1 (en) * 2002-02-27 2003-08-29 Cera Fixing and vibration decoupling device for automobile acoustic screen comprises flexible piece with connections to first element and rigid piece connected to flexible piece with housing for mounting rod
EP1348876A1 (en) * 2002-02-27 2003-10-01 Centre d'Etude et de Recherche pour l'Automobile ( CERA) Fixing and vibration isolating device made of two materials
US7168879B2 (en) * 2002-10-31 2007-01-30 Bollhoff Gmbh Plug-in coupling allowing for compensating movements
JP2005290996A (en) * 2004-03-31 2005-10-20 Toyoda Gosei Co Ltd Installation structure for engine cover
WO2016166198A1 (en) * 2015-04-15 2016-10-20 Autoneum Management Ag Snap-in mounting for mounting an engine top cover
CN107466275A (en) * 2015-04-15 2017-12-12 欧拓管理公司 For installing the fastening installed part of bonnet
US20180094669A1 (en) * 2015-04-15 2018-04-05 Autoneum Management Ag Snap-in mounting for mounting an engine top cover
WO2020098867A1 (en) * 2018-11-14 2020-05-22 Kiekert Ag Bearing for fastening a component in a motor vehicle

Also Published As

Publication number Publication date
DE10036429A1 (en) 2001-04-19
GB2352492B (en) 2003-02-12
FR2796998B1 (en) 2001-09-21
GB0018244D0 (en) 2000-09-13
FR2796998A1 (en) 2001-02-02

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20050725