EP1872010A1 - Dispositif de fixation pour le montage d'un porte-injecteur sur un moteur a combustion interne et moteur a combustion interne comprenant un tel dispositif - Google Patents
Dispositif de fixation pour le montage d'un porte-injecteur sur un moteur a combustion interne et moteur a combustion interne comprenant un tel dispositifInfo
- Publication number
- EP1872010A1 EP1872010A1 EP06764822A EP06764822A EP1872010A1 EP 1872010 A1 EP1872010 A1 EP 1872010A1 EP 06764822 A EP06764822 A EP 06764822A EP 06764822 A EP06764822 A EP 06764822A EP 1872010 A1 EP1872010 A1 EP 1872010A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- injector
- internal combustion
- combustion engine
- holder
- vibrations
- 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
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 22
- 239000000446 fuel Substances 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000002513 implantation Methods 0.000 description 10
- 238000007906 compression Methods 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 6
- 230000005284 excitation Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 230000003534 oscillatory effect Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000013598 vector Substances 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/09—Fuel-injection apparatus having means for reducing noise
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
- F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical means
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/803—Fuel injection apparatus manufacture, repair or assembly using clamp elements and fastening means; e.g. bolts or screws
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/85—Mounting of fuel injection apparatus
-
- 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
- F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
- F02M35/10078—Connections of intake systems to the engine
- F02M35/10085—Connections of intake systems to the engine having a connecting piece, e.g. a flange, between the engine and the air intake being foreseen with a throttle valve, fuel injector, mixture ducts or the like
Definitions
- Fastening device for mounting an injector holder on an internal combustion engine and an internal combustion engine comprising such a device.
- the invention relates to a fastening device for mounting an injector carrier, a source of vibration, on an internal combustion engine capable of receiving and transmitting the vibrations, by means of a fastening element, and an internal combustion engine comprising such a device.
- a fastening device for mounting an injector carrier, a source of vibration, on an internal combustion engine capable of receiving and transmitting the vibrations, by means of a fastening element, and an internal combustion engine comprising such a device.
- Recent approaches to reduce the noise that a motor vehicle in general and a particular powertrain generate are increasingly directed to the very sources of noise. Indeed, the most effective approaches to reduce noise and vibration, are to act closer to the source, or even directly on the cause of noise when possible.
- the injectors are intended to be mounted, to perform their function, on an engine block provided with at least one combustion chamber in which such an injector must inject a fuel.
- Injectors are a source of vibration for two reasons. Firstly, the injectors are a source of vibration because of the moving parts which are activated for the subsequent preparation of the fuel portions intended to be injected into the combustion chamber or chambers according to the engine speed. These parts are generally solicited in translatory and oscillatory movements.
- the injectors are then a source of vibration because of pressure changes that occur continuously during the preparation and injection of the fuel portions. Each change of pressure, and in particular each discharge of pressure, generates vibrations. These vibrations propagate in the form of a directly audible acoustic radiation. Other vibrations from the injectors are caused by changes in pressure that cause contractions of the body and parts of the injectors.
- the noise of the injectors transmitted and radiated by an internal combustion engine is linked on the one hand to an exciter phenomenon of the piezoelectric actuator for diesel injectors and needle shock for gasoline injectors.
- the noise of the injectors is related to the dynamic response of the injector holder to this excitation. This vibratory behavior makes the injector holder emissive on the airway and exciter, on the solid track, for the top of the engine which can in turn radiate.
- Controlling the quantities of fuel injected imposes needle movements, therefore the actuator, faster and faster to meet the objectives of limiting pollution and to limit the noise of combustion or to limit consumption.
- the object of the invention is achieved with a fixing device for mounting an injector holder, source of vibration, on an internal combustion engine, capable of receiving and transmitting the vibrations, with the aid of a fastening element.
- the fixing device comprises vibration compensation means in the form of a first element forming a moving mass and a set of second elements forming springs connecting the moving mass to the fixing element. .
- the present invention makes it possible to reduce the vibrations inherent in the operation of an injector by reducing the vibratory amplitudes of the fastening system of the injector at the traction / compression frequencies of the injector holder and thus to reduce the level of noise radiated by the injector carrier by air means that the vibratory excitation imposed on the upper part of the engine by the solid track.
- the present invention makes it possible to reduce the impulse character of the noise, to which the injector contributes in a strong manner, and thus makes it possible to contribute to the improvement of the acoustic coloration of the internal combustion engines.
- the present invention also relates to the following characteristics, taken separately or in any technically possible combination:
- the compensation means are shaped to damp axial vibrations
- the second elements are formed by helical springs
- the second elements are formed by Belleville springs; the second elements are formed by elastomeric springs.
- the object of the present invention is also achieved with an internal combustion engine, injection, comprising at least one fuel injector mounted on a cylinder head of the engine, the engine comprising a fixing device described above.
- the present invention therefore deals with the dynamic response of the system, to obtain arrangements to better control the acoustic radiation and the excitation that it imposes on the upper part of the engine.
- the device of the invention is based on the observation that the eigenmode, partly responsible for the noise of the injectors, is associated with a deformation of the "traction-compression" type of the injector holder in the longitudinal axis of the injectors, generating as a result of significant displacement of the fastening system in the same axis.
- This clean mode is generally located around 4000 Hz. It is strongly solicited by excitations from the actuator or the needle of the injector.
- the fixing device according to the invention incorporates the principle of axial drummer conventionally used as vibratory damper, applied here to the fixing system of the injector holder. Fixing can be done by a flange or a fork. Subsequently, the invention will be described for the attachment of an injector holder with a fork. Other types of attachment will be the subject of alternative embodiments of the invention.
- the principle of the drummer is adapted as far as possible, on the maximum range of the fork and according to the possibilities of implantation.
- vibration compensation means are preferably arranged or implanted near the bearing points of the fork on the injector holder.
- These vibration compensation means are simple mass-spring systems whose frequency -JKIM is to stall on the frequency of traction / compression of the injector holder. It is necessary to ensure perfect mobility of the mass relative to the range.
- the spring system can be realized by the use of coil springs, placed on either side of the mass, or by the use of Belleville springs or by the use of an elastomer.
- the entire moving mass and the spring system can be implanted for example, near the points of support on the injector holder.
- the maximum deflection zones of the flange are determined, if necessary according to the possibilities of implementation of the system. In case of difficulty of implantation on the maximum deflection areas, it is also possible to insert the movable mass assembly and spring in a less restrictive position.
- this fastening element can receive three sets of moving mass and a spring, near the bearing points of the flange on the injector holder, with the possibility of wedging each of them at a different frequency. It is the same for the case of a double flange mentioned above.
- the mass-spring system described above can be replaced by a single piece having appropriate dimensions and whose stiffness and clean mass lead to a natural frequency -JKIM which is to stall on the traction / compression frequency of the injector holder.
- the fastening device for mounting, using a fastening element, such as a fork, a flange or any other suitable element, a carrier injector, source of vibration, on an internal combustion engine, capable of receiving and transmitting vibrations uses the principle of the axial mixer to a degree of freedom. This makes it possible to cancel the displacement of a structure, in resonance or in forced response to a given frequency.
- the single beater is an additional system of mass M 2 and stiffness K 2 , additional to the fixing system, as shown in Figure 1 of the accompanying drawings.
- the system formed by the fixing element and the system formed by the beater each have a natural frequency defined according to the equation for the element of
- the device of the invention makes it possible to reduce the vibratory amplitudes of the fastening system at the traction-compression frequencies of each of the injector holders and thus to reduce the level of noise radiated by the injector nozzle (s) by air, as well as the vibratory excitation imposed on the upper part of the motor by solidary way.
- FIG. 1 shows the principle of the axial mixer to a degree of freedom applied to an oscillating mass
- FIG. 2 shows the implementation of a drummer in a fork for assembly
- FIG. 3 shows the implantations of drummers in a symmetrical flange intended for mounting an injector holder
- FIG. 4 assembles the drummer implantations in a double flange intended for mounting a carrier; injector,
- FIG. 5 shows the implantations of drummers in a three-point flange intended for mounting an injector holder
- FIG. 6 shows a single piece capable of vibrating and intended to replace the mass and spring system.
- FIG. 1 represents the principle of the present invention according to which a fixing element having mass M 1 and stiffness K 1 , which is subjected to a force F ( ⁇ ), is provided with a single beater having mass M 2 and the stiffness K 2 whose oscillatory or vibratory behavior is superimposed on that of the fixing element.
- the two elements, the fixing element and the beater, are therefore connected to each other additionally, and each of these two systems is subjected to displacements of the same orientation represented by the arrows U 1 and u 2. .
- FIG. 2 shows the implementation of a drummer on a fastener according to one embodiment of the invention.
- FIG. 2 shows a fork 1 fixing an injector holder 2 on an internal combustion engine 3.
- the fork 1 is fixed on the engine 3 by means of a bolt 4 passing through an orifice 5 made in the fork 1 .
- drummers B At the two ends 6 and 7 of the fork 1, ends intended to bear on the injector holder 2 are drummers B, one of which is shown schematically at the top of Figure 2.
- This drummer comprises a mass M and two springs R1, R2 whose upper spring R1 has a stiffness K / n and the lower spring R2 has a stiffness (n-1) x K / n.
- Figure 3 shows schematically a flange 11 in an axial view and a side view.
- a flange 11 in an axial view and a side view.
- two orifices 12, 13 for fixing the flange
- two locations 14, 15 for the implantation of drummers.
- the flange in side view shows the implantation of one of the drummers B.
- FIG. 4 schematically shows a double flange 21 in a perspective view with two injector holders 22, 23.
- the double flange 21 is fixed to an internal combustion engine 3A by means of a screw 24 passing through a hole 25 practiced in the bridle.
- the double flange 21 comprises six beater implantations B, that is to say three for each injector holder. Implantations are indicated by circles drawn in solid lines or broken lines.
- FIG. 5 schematically shows a three-point flange 31 in a perspective view with an injector holder 32.
- the three-point flange 31 is attached to an internal combustion engine 3B by means of three screws 33 to 35 passing through holes in the flange, but hidden in Figure 5 by washers placed under the heads of the screws.
- the three-point flange 31 comprises three implementations of drummers B.
- the implantations are indicated by circles.
- Figure 6 shows a variant of the fastener according to the invention according to which a single piece 41 able to vibrate is intended to replace the mass and spring system.
- a beater B is implanted in one of two ends 42, 43 of the single piece 41. In the embodiment shown in FIG. 6, the beater B is implanted at the end 42.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Testing Of Engines (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0504064A FR2884876B1 (fr) | 2005-04-22 | 2005-04-22 | Dispositif de fixation pour le montage d'un porte-injecteur sur un moteur a combustion interne et moteur a combustion interne comprenant un tel dispositif |
| PCT/FR2006/050348 WO2006111677A1 (fr) | 2005-04-22 | 2006-04-13 | Dispositif de fixation pour le montage d'un porte-injecteur sur un moteur a combustion interne et moteur a combustion interne comprenant un tel dispositif |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1872010A1 true EP1872010A1 (fr) | 2008-01-02 |
| EP1872010B1 EP1872010B1 (fr) | 2009-09-02 |
Family
ID=34955317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06764822A Expired - Lifetime EP1872010B1 (fr) | 2005-04-22 | 2006-04-13 | Dispositif de fixation pour le montage d'un porte-injecteur sur un moteur a combustion interne et moteur a combustion interne comprenant un tel dispositif |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1872010B1 (fr) |
| AT (1) | ATE441780T1 (fr) |
| DE (1) | DE602006008916D1 (fr) |
| FR (1) | FR2884876B1 (fr) |
| WO (1) | WO2006111677A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007050512A1 (de) * | 2007-10-23 | 2009-04-30 | Volkswagen Ag | Brennkraftmaschine mit Kraftstoffinjektoren |
| JP2014118861A (ja) * | 2012-12-14 | 2014-06-30 | Honda Motor Co Ltd | 燃料噴射装置の取付構造 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4413393C1 (de) * | 1994-04-18 | 1995-06-08 | Freudenberg Carl Fa | Elastische Befestigungsvorrichtung zur schwingungsentkoppelten Befestigung eines Gehäuses an einer Verbrennungskraftmaschine |
| FR2756872B1 (fr) * | 1996-12-06 | 1999-01-15 | Renault | Dispositif de fixation pour un injecteur de moteur a combustion interne |
| US6431152B1 (en) * | 2001-03-30 | 2002-08-13 | International Engine Intellectual Property Company, L.L.C. | Injector hold down clamp |
-
2005
- 2005-04-22 FR FR0504064A patent/FR2884876B1/fr not_active Expired - Fee Related
-
2006
- 2006-04-13 DE DE602006008916T patent/DE602006008916D1/de not_active Expired - Lifetime
- 2006-04-13 EP EP06764822A patent/EP1872010B1/fr not_active Expired - Lifetime
- 2006-04-13 AT AT06764822T patent/ATE441780T1/de not_active IP Right Cessation
- 2006-04-13 WO PCT/FR2006/050348 patent/WO2006111677A1/fr not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2006111677A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2884876B1 (fr) | 2007-08-03 |
| WO2006111677A1 (fr) | 2006-10-26 |
| EP1872010B1 (fr) | 2009-09-02 |
| ATE441780T1 (de) | 2009-09-15 |
| FR2884876A1 (fr) | 2006-10-27 |
| DE602006008916D1 (de) | 2009-10-15 |
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