EP0860605B1 - Maschine mit niedrigem Lärmpegel und Verfahren zum Zusammenbau - Google Patents

Maschine mit niedrigem Lärmpegel und Verfahren zum Zusammenbau Download PDF

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Publication number
EP0860605B1
EP0860605B1 EP97102947A EP97102947A EP0860605B1 EP 0860605 B1 EP0860605 B1 EP 0860605B1 EP 97102947 A EP97102947 A EP 97102947A EP 97102947 A EP97102947 A EP 97102947A EP 0860605 B1 EP0860605 B1 EP 0860605B1
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EP
European Patent Office
Prior art keywords
engine
sound absorbing
component
foaming
foaming material
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.)
Expired - Lifetime
Application number
EP97102947A
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English (en)
French (fr)
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EP0860605A1 (de
Inventor
Tiharu Togashi
Hideaki Shigyo
Teruo Nakada
Eiji Wako
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.)
Isuzu Motors Ltd
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Isuzu Motors Ltd
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 Isuzu Motors Ltd filed Critical Isuzu Motors Ltd
Priority to EP02022063A priority Critical patent/EP1270927B1/de
Priority to EP97102947A priority patent/EP0860605B1/de
Priority to DE69722372T priority patent/DE69722372T2/de
Publication of EP0860605A1 publication Critical patent/EP0860605A1/de
Application granted granted Critical
Publication of EP0860605B1 publication Critical patent/EP0860605B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • F02M39/00—Arrangements of fuel-injection apparatus with respect to engines; Pump drives adapted to such arrangements
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump

Definitions

  • the present invention relates to a method of assembling an engine with a structure for preventing the noise of an engine by reducing the noise produced by a fuel injection pump itself of the engine and accounting for a large ratio of the engine noise, the noise due to the standing wave between the fuel injection pump and the cylinder block of the engine.
  • the engine noise is a serious problem in the manufacture of a comfortable automobile.
  • These noises are generally called engine noise.
  • EP 0 691 462 A1 shows a partially encased internal combustion engine for commercial vehicles in which several casing parts form the sound-Insulating partial casing.
  • the space between each of two lateral sound-insulating plates and the crank case as well as the yoke plate is completely filled with additional sound-insulating material, e.g. by packing it with a suitable formed plastics material or by using pre-shaped insulating mats.
  • a noise preventing device has been proposed, as shown in Fig. 10, in Japanese utility model application Kokai publication No. 4-95631.
  • the gap G between a cylinder block 1 and a fuel injection pump 2 is sealed at its upper and lower portions by metal covers 4a and 4b which are attached to the side of the cylinder block 1 and the side of the fuel injection pump 2 through seal members 3.
  • This gap G is sealed with a sound absorbing material 5 such as glass wool or a foaming resin such as foaming urethane.
  • this device can prevent the aforementioned standing wave but not the noise which is produced from the fuel injection pump 2 Itself.
  • the noise is secondarily generated by the vibrations of the metal covers 4a and 4b.
  • FIG. 11 Another noise preventing device, as shown in Fig. 11, is proposed in Japanese utility model application Kokai publication No. 3-95072.
  • This device is equipped with a casing of a damping steel sheet which has the sound absorbing member 5 such as glass wool bonded to the inner side of the front face of the fuel injection pump 2.
  • the sound absorbing member 5 such as glass wool bonded to the inner side of the front face of the fuel injection pump 2.
  • a gap g is left between the cylinder block 1 and the fuel injection pump 2
  • a spatial portion 7 is left between the sound absorbing member 5 bonded to the casing 6 of the front portion and the fuel injection pump 2, thus making it impossible to sufficiently prevent not only the noise due to the standing wave but also the noises produced from the cylinder block 1 and the fuel injection pump 2 itself.
  • the casing 6 is made of a metal to raise a problem that secondary noise is generated by the vibration of the casing 6.
  • a foaming resin is used as the sound absorbing member
  • One method is forming a fitting type sound absorbing member by producing a mold from both the fuel injection pump and the metallic cover or casing and heating the foaming polyurethane to 40 to 50 DEG C in the mold to foam and shape it; the other is forming a filling type sound absorbing member by injecting and foaming a liquid foaming material after assembling the fuel injection pump and the metallic cover or casing.
  • the sound absorbing member and the mounting portion may fail to conform completely in their shapes, thus causing a problem that the sound absorbing member cannot be assembled in the mounting portion and a gap is established after the assembly to lower the sound absorbing effect.
  • the sound absorbing member has a complicated shape
  • its mold has to be divided and resultantly the number of molds increase.
  • a new mold is required for molding the new sound absorbing member in accordance with ther change in the shape of the mounting portion, thus raising a problem that the production cost is raised.
  • the method of forming the filling type sound absorbing member is proposed to solve the aforementioned problem of the fitting type sound absorbing member.
  • the foamed silicone sheet to be mounted on the side surface of the cylinder block of the engine is formed by injecting a liquid foaming silicone resin into the gap between the side portion of the cylinder block and a reinforcing plate and by foaming and setting the resin at a predetermined temperature to form the side cover.
  • the engine components such as the fuel injection pump often have complicated shapes so that the spatial portion to be formed between the component and a cover member such as the metal cover or the casing is complicated to have narrow and wide portions, making it difficult to form a guide passage leading to the back of the fuel injection pump for guiding the foaming liquid.
  • the filling type sound absorbing member In the method of forming the filling type sound absorbing member, therefore, it is difficult to charge the entire region of the spatial portion with the foaming liquid, and it is impossible to distribute the foaming liquid by adjusting the amount in accordance with the local width and volume of the spatial portion. As a result, cavities and density irregularity are liable to occur in the foamed sound absorbing member, thus causing a problem that the sound absorbing effect of the foaming material cannot be exhibited to the maximum.
  • an injection port has to be formed in a position to inject the foaming liquid into the spatial portion for forming the sound absorbing member, and an opening unnecessary to prevent the noise, has to be formed, raising a problem that the noise preventing effect is insufficient.
  • openings such as for the control lever other than the injection port existing in the cover member have to be closed to prevent the foaming liquid from leaking out, raising a problem that the jig and works for dogging those openings are additionally required.
  • An object of the present invention is to provide a method of assembling an engine equipped with a sound absorbing member for preventing the noise of the engine, in which by a simple work the sound absorbing member can be formed substantially evenly without any cavity between the cover member and the engine component and in the entire region of the spatial portion between the noise generating portion of the engine and the engine component, thereby reducing the engine noise effectively.
  • a method of assembling an engine having sound absorbing members by covering a noise generating engine components such as the fuel injection pump with cover members through sound absorbing members comprising the steps of: applying an unfoamed foaming material to one or both of the inner face of the cover members and the component; covering the component with the cover members; heating the component to foam the foaming material thereby to expand the sound absorbing members; and assembling the integrated component with the engine body.
  • a method of assembling an engine having sound absorbing members by covering a noise generating engine component with cover members through sound absorbing members comprising the steps of: applying an unfoamed foaming material to one or both of the inner face of the cover members and the component; assembling the component covered with the cover members, with the engine body; and heating the component to foam the foaming material thereby to expand the sound absorbing members.
  • a method of assembling an engine having sound absorbing members comprising the steps of: applying an unfoamed foaming material to at least one portion of the face defining a space between a noise generating portion of the engine and an engine component confronting the noise generating portion; assembling the engine component; and foaming the foaming material by heating the noise generating portion to expand and foam sound absorbing members between the engine body and the engine component.
  • a method of assembling an engine having sound absorbing members by covering a noise generating engine component with cover members through sound absorbing members comprising the steps of: applying an unfoamed foaming material to one or both of the inner face of the cover members and the component; pre-foaming the foaming material by heating it for a short time; covering the component with the cover members; and then heating the component to foam the foaming material thereby to expand the sound absorbing members.
  • a method of assembling an engine having sound absorbing members by covering a noise generating engine component with cover members through sound absorbing members comprising the steps of: applying an unfoamed foaming material to one or both of the inner face of the cover members and the component; pre-foaming the foaming material by heating it for a short time; assembling the component in the state that it is covered with the cover members, with the engine body; and heating the component to foam the foaming material thereby to expand the sound absorbing members.
  • the unfoamed foaming material After the unfoamed foaming material has been applied, it is heated at its foaming temperature for a short time to perform the preheating, by which the foaming is effected substantially halfway, thereby to solidify the unfoamed gel foaming material so that the liquid run of the foaming material can be prevented to simplify the assembling work.
  • a method of assembling an engine having sound absorbing members by covering a noise generating engine component with cover members through sound absorbing members comprising the steps of: applying a foaming sheet formed into a sheet shape from an unfoamed foaming material to one or both of the inner face of the cover members and the component; covering the component with the cover members; and heating the component to foam the foaming material thereby to expand the sound absorbing members, before and after the component is assembled with the engine body.
  • a method of assembling an engine having sound absorbing members comprising the steps of: applying a foaming sheet formed into a sheet shape from an unfoamed foaming material to at least one portion of the face defining a space between a noise generating portion of the engine and an engine component confronting the noise generating portion; assembling the engine component; and foaming the foaming material by heating the noise generating portion to expand and form sound absorbing members between the engine body and the engine component.
  • the foaming material can be easily distributed in a proper amount by overlapping the foaming sheets in accordance with the thickness of the sound absorbing members to be formed.
  • the heating operation for the foaming after the engine assembly may be effected by heating the component and the noise generating portion from the outside of the cover members with the hot air or steam.
  • the heat source and the heating work can be eliminated if the heating operation is performed by the heat of the engine itself generated at the bench test of the engine.
  • a fuel injection pump 2A is so fixed on the cylinder block 1A side of an engine 10 that the fuel is sucked from a lower piping 13a and is pressurized until it Is injected into the cylinder through an upper piping 13b and a fuel injection nozzle.
  • shielding members 11 and 12 of the present invention covers the fuel injection pump 2A substantially except for the portion in which a control lever 15 and the pipings 13a and 13b are arranged.
  • a method of forming the shielding members 11 and 12 of the present invention comprising cover members 11a, 11c and 12a and sound absorbing members 11b and 12b.
  • the fuel injection pump 2A is mounted on the cylinder block 1A.
  • the back cover member 11a made of heat resisting rubber at the lower side of the back of the fuel injection pump 2A is fixed to the block 1A with bolts 16 to substantially cover the lower side of the gap between the cylinder block 1A and the fuel injection pump 2A.
  • the portion substantially surrounded by the back cover member 11a, the cylinder block-1A and the fuel injection pump 2A is charged with a foaming material of a synthetic resin to form the back sound absorbing member 11b. This back sound absorbing member 11b is applied without any clearance.
  • the back cover member 11c made of heat resisting rubber at the upper side of the back of the fuel injection pump 2A is fixed to the cylinder block 1A with the bolts 16 to substantially cover the upper side of the gap between the cylinder block 1A and the fuel injection pump 2A.
  • the first shielding member 11 comprising the back cover members 11a and 11c and the back sound absorbing member 11b.
  • This charge of the foaming material can be simplified by eliminating the member for and the step of closing the gap if the cover members 11a and 11c are partially constructed in contact directly with the surface of the fuel injection pump 2A.
  • the front cover member 12a is so fixed by a method using clips 17 or a hook-and-loop fastener as to substantially cover the surface of the fuel injection pump 2A left uncovered with the first shielding member 11.
  • the space portion substantially surrounded by the first shielding member 11, the front cover member 12a and the fuel injection pump 2A is charged with a foaming material of a synthetic resin to form the front sound absorbing member 12b.
  • the second shielding member 12 comprising the front sound absorbing member 12b and the front cover member 12a.
  • This second shielding member 12 is constructed to cover the surface of the fuel injection pump 2A substantially except for the control portion such as the lever 15 of the fuel injection pump 1A, the portions of the pipings 13a and 13b, and an excepted portion 18 which is opened, as necessary, for the heat dissipation or for injecting the foaming material.
  • This excepted portion 18 can be formed, as necessary, on the shielding member 11 side.
  • the shielding structure in which the surface of the fuel injection pump 2A is substantially covered with the shielding members 11 and 12 comprising of the sound absorbing members 11b and 12b and the cover members 11a, 11c and 12a.
  • this charging step of those sound absorbing members 11b and 12b need not always be conducted only at the working time of mounting the fuel injection pump 2A on the cylinder block of the engine.
  • the sound absorbing members can be molded beforehand for convenience of the working step by using the mold and the cover members 11a, 11c and 12a.
  • first and second shielding members 11 and 12 can be mounted on and demounted from the surface of the fuel injection pump 2A by the clips 17 and the not-shown hook-and-loop fastener.
  • this demountable portion is constructed such that the cover member 12a is partially in contact directly with the surface of the fuel injection pump 2A, the member for and the step of closing the gap between the fuel injection pump 2A and the cover members 11a and 11c required at the time of filling the foaming material, can be eliminated, unlike the construction having the sound absorbing members arranged in the gap, to simplify the work of filling the foaming material.
  • the shielding members 11 and 12 are divided into the back portion and the front portion of the fuel injection pump 2A so that they can be separated at the surface portion near the longitudinal center portion of the fuel injection pump 2A to facilitate the formation, disassembly and assembly.
  • the adjustment, inspection and repair can be simplified if the shielding member 12 is formed such that the surface of the fuel injection pump 2A at the portions necessary for the adjustment, inspection and repair is easily exposed as a whole.
  • first and second shielding members 11 and 12 need not always be made unitary but can be separated, as necessary, to facilitate the formation, disassembly and assembly.
  • the first shielding member 11 between the cylinder block 1A and the fuel injection pump 2A is constructed into a sandwich structure of the sound absorbing member 11b, the cover member 11a and the sound absorbing member 11b. Thanks to this sandwich structure, the effect of retaining the sound absorbing member 11b is enhanced by the highly rigid cover member 11a, and this cover member 11a can be arranged at the back of the fuel injection pump 2 to enhance the noise preventing effect.
  • This sandwich structure can also be applied to the second shielding member 12.
  • Fig. 5 is a graph illustrating this noise preventing effect, and the abscissa shows the number of revolutions of the engine whereas the ordinate shows the noise level measured near the engine, in a relative difference of one graduation of 2 dB.
  • Curve A shows the noise level of a place near by the engine but without the shielding structure
  • curve B shows the noise level with the shielding structure of the present invention
  • a hatched region C between the curves A and B is the difference between the aforementioned two noise levels and indicates the noise preventing effect according to the present invention.
  • a high noise preventing effect can be achieved although the reduction in the noise level is different for the engine number of revolutions.
  • the shielding member can be separated into a plurality of front and back parts so that it can be easily disassembled. As a result, it is possible to provide a shielding structure of a fuel injection pump for preventing the engine noise, which facilitates the adjustment, inspection and repair of the fuel injection pump.
  • the fuel injection pump 2A according to an embodiment of the invention, covered with the cover member (or pump cover) 11 a, 11c and 12a, will be described with reference to Figs. 1 and 2.
  • the fuel injection pump 2A is mounted on the side of the cylinder block 1A constituting the engine body and is constructed to suck the fuel from the fuel suction piping (13a in Fig. 8) at its lower portion and to pressurize and inject it into the cylinder through the fuel discharge piping (13b in Fig. 8) at its upper portion and the fuel injection nozzle.
  • the shielding members 11 and 12 in which the sound absorbing members 11b and 12b are covered with the pump covers 11a, 11c and 12a, cover the entirety of the fuel injection pump 2A substantially except for the excepted portion, in which the control lever 15 and the fuel discharge piping 13b, the part hatched in Fig. 9.
  • a pump cover 30 (11a, 11c and 12a in Figs. 1 and 2) is made of a material having a heat resistance and a sound insulating effect and capable of keeping the cover shape, such as a thin sheet of metallic material, e.g., a steel sheet or a damping steel sheet, or heat resisting rubber.
  • the sound absorbing member 31a (11b and 12b in Figs. 1 and 2) is formed, in the following manner, of a foaming material 31 of a synthetic resin, e.g., foaming urethane, which will foam at an atmosphere temperature of, say, 40 to 50 DEG C.
  • a foaming material 31 of a synthetic resin e.g., foaming urethane
  • an appropriate amount of foaming material 31 before the foaming is applied to one or both of the inner face of the pump cover 30 and the surface of the fuel injection pump 2A, while considering its volume after the foaming.
  • This application of appropriate amount can be optimized by partially applying the foaming material 31 in conformity with the local volume of the spatial portion or by partially applying it several times.
  • the pump cover 30 coated with the foaming material 31 before the foaming is attached to the single body of the fuel injection pump 2A before assembled with the engine body 10.
  • This pump cover 30 is heated from the outside with hot air, steam or infrared rays to raise the temperature of the pump cover 30 or its ambient temperature to the foaming level so that the foaming material 31 is foamed to expand a sound absorbing member 31a.
  • the fuel injection pump 2A, covered with the pump cover 30, is assembled through the sound absorbing member 31a with the engine body 10.
  • the fuel injection pump 2A, covered with the pump cover 30, is assembled with the engine body 1, as shown in Fig. 6(a), and after this assembly, the fuel injection pump 2A is partially heated to raise the temperature of the pump cover 30 or its ambient temperature to the foaming level so that the foaming material 31 is foamed to expand and form the sound absorbing member 31a, as shown in Fig. 6(b).
  • This heating may be conducted with hot air or steam from the outside of the engine but may preferably be effected by the heat of the engine itself generated when the engine is run under the bench test. If this heat of the engine itself is used; the foaming of the sound absorbing member 31a can be effected during the test run after the engine assembly without preparing any special heating source, so that the shaping work of the sound absorbing member 31a can be simplified.
  • the present invention has been described heretofore as related to the fuel injection pump 2A as an component of an engine but should not be limited thereto and can be applied to another engine component producing the engine noise.
  • an appropriate amount of the foaming material 31 before foamed is applied beforehand to one or both of the surface of a V-bank portion 20b of the cylinder block forming part of the noise generating portion of the engine and the lower lace of an intake manifold 20a of the engine component. After this, the intake manifold 20a is assembled with that V-bank portion 20b to construct the engine.
  • the face or faces coated may be selected from those which confront the spatial portion formed in a portion of the engine or the engine component and to be charged with the foaming material and which can be easily coated without any obstruction to the assembling work.
  • the noise generating portion is heated to foam the foaming material 31 to expand and form the sound absorbing member 31a between the V-bank portion 20b and the engine component 20a, as shown in Fig. 7(b).
  • the engine assembling method thus far described it is possible to dispersedly provided the foaming material 31 easily deep into the narrow portion of the spatial portion to form the sound absorbing member 31a, and to distribute an adjusted amount of foaming material 31 conforming to the local volume of the spatial portion 21 while preventing any cavity or uneven density in the foamed sound absorbing member 31a, thereby to optimize the sound absorbing effect of the foaming material.
  • the cover member need not have such an opening for injecting the foaming liquid unnecessary for the sound insulation, nor need be closed the opening of the cover member for preventing the leakage of the foaming liquid other than the injection opening, so that the shaping of the sound absorbing member 31a can be simplified.
  • the foaming material foamable by heating it After the foaming material foamable by heating it has been applied, it is subjected to a preparatory foaming treatment in which it is heated at a foaming temperature for a short time so that it may be half foamed.
  • a preparatory foaming treatment in which it is heated at a foaming temperature for a short time so that it may be half foamed.
  • the unfoamed foaming material is shaped into a sheet, and this foaming sheet can be applied to the necessary portion. If this foaming sheet is used, the coating of the foaming material may be replaced by application of the foaming sheet which has been formed beforehand Into a proper shape. Depending on the thickness of the sound absorbing member to be expanded, moreover, a suitable number of foaming sheets can be overlapped to distribute an appropriate amount of the foaming material easily thereby to improve the working efficiency.
  • the foaming can be performed in the test run after the engine has been assembled.
  • the foaming step can be eliminated, and the heat source for the foaming can be eliminated, so that the shaping work can be simplified to lower the cost.
  • the sound absorbing members for preventing the noise of the engine can be uniformly formed without any cavity either in the whole region of the spatial portion between the cover members and the engine component or in the whole region of the spatial portion between the noise generating portion of the engine and the engine component.
  • the foaming material can be foamed by making use of the heat of the engine at the running time so that it can eliminate the heat source and the heating work for foaming thereby to simplify the forming of the sound absorbing members.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Exhaust Silencers (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)

Claims (9)

  1. Verfahren zum Zusammenbauen eines Motors mit schallabsorbierenden Gliedern durch Abdecken einer lärmerzeugenden Motorkomponente mit Gehäuseelementen durch schallabsorbierende Elemente, das die Schritte aufweist:
    Aufbringen eines nicht ausgeschäumten Schaumbildungsmaterials auf eine oder beide inneren Flächen der Gehäuseelemente und der Komponente,
    Abdecken der Komponente mit den Gehäuseelementen
    Heizen der Komponente, um das schaumbildende Material auszuschäumen, wodurch die schallabsorbierenden Elemente expandiert werden, und
    Zusammenbauen der integrierten Komponente mit dem Motorkörper.
  2. Verfahren zum Zusammenbauen eines Motors nach Anspruch 1, das den Schritt aufweist:
    Heizen der Komponente, um das aufschäumende Material aufzuschäumen, wodurch sich die schallabsorbierenden Glieder ausdehnen, bevor die Komponente, die mit den Gehäuseelementen abgedeckt ist, mit dem Motorkörper zusammengebaut wird.
  3. Verfahren zum Zusammenbauen eines Motors nach Anspruch 1, das den Schritt aufweist:
    Heizen der Komponente, um das schaumbildende Material auszuschäumen, wodurch sich die schallabsorbierenden Elemente ausdehnen, nachdem die Komponente, die mit den Gehäuseelementen abgedeckt ist, mit dem Motorkörper zusammengebaut wird.
  4. Verfahren zum Zusammenbauen eines Motors nach Anspruch 1, das den Schritt aufweist:
    Heizen der Komponente, um das schaumbildende Material auszuschäumen, wodurch sich die schallabsorbierenden Elemente ausdehnen, vor und nachdem die Komponente zusammengebaut wird.
  5. Verfahren zum Zusammenbauen eines Motors nach einem der Ansprüche 1 bis 4, das den Schritt aufweist:
    Vorschäumen des schaumbildenden Materials durch Erwärmen dieses Materials für eine kurze Zeit,
    bevor die Komponente mit den Gehäuseelementen abgedeckt wird.
  6. Verfahren zum Zusammenbauen eines Motors nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das schaumbildende Material in einer Schichtform von einem nicht ausgeschäumten Schaumbildungsmaterial gebildet wird, bevor das schaumbildende Material auf eine oder beide innere Flächen der Gehäuseelemente und der Komponente aufgebracht wird.
  7. Verfahren zum Zusammenbauen eines Motors mit schallabsorbierenden Elementen, das die Schritte aufweist:
    Aufbringen eines nicht ausgeschäumten schaumbildenden Materials auf zumindest einen Abschnitt einer Fläche, die einen Raum zwischen einem lärmerzeugenden Abschnitt des Motors und einer Motorkomponente, die dem lärmerzeugenden Abschnitt gegenübersteht, definiert,
    Zusammenbauen der Motorkomponente, und
    Ausschäumen des schaumbildenden Materials durch Heizen des lärmerzeugenden Abschnitts, so daß sich schallabsorbierende Elemente zwischen dem Motorkörper und der Motorkomponente ausdehnen und bilden.
  8. Verfahren zum Zusammenbauen eines Motors nach Anspruch 7, dadurch gekennzeichnet, daß das schaumbildende Material in einer Schichtform von einem nicht ausgeschäumten schaumbildenden Material gebildet wird, bevor das schaumbildende Material auf zum indest einen Abschnitt der Fläche aufgebracht wird, die einen Raum zwischen einem lärmerzeugenden Abschnitt des Motors und einer Motorkomponente, die dem lärmerzeugenden Abschnitt gegenübersteht, definiert.
  9. Verfahren zum Zusammenbauen eines Motors mit schallabsorbierenden Elementen nach einem der Ansprüche 3 bis 8, wobei das Heizen durch die Wärme bewirkt wird, die durch das Laufen des Motors erzeugt wird.
EP97102947A 1997-02-22 1997-02-22 Maschine mit niedrigem Lärmpegel und Verfahren zum Zusammenbau Expired - Lifetime EP0860605B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP02022063A EP1270927B1 (de) 1997-02-22 1997-02-22 Brennkraftmaschine mit niedrigem Lärmpegel
EP97102947A EP0860605B1 (de) 1997-02-22 1997-02-22 Maschine mit niedrigem Lärmpegel und Verfahren zum Zusammenbau
DE69722372T DE69722372T2 (de) 1997-02-22 1997-02-22 Maschine mit niedrigem Lärmpegel und Verfahren zum Zusammenbau

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP97102947A EP0860605B1 (de) 1997-02-22 1997-02-22 Maschine mit niedrigem Lärmpegel und Verfahren zum Zusammenbau

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP02022063A Division EP1270927B1 (de) 1997-02-22 1997-02-22 Brennkraftmaschine mit niedrigem Lärmpegel

Publications (2)

Publication Number Publication Date
EP0860605A1 EP0860605A1 (de) 1998-08-26
EP0860605B1 true EP0860605B1 (de) 2003-05-28

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Application Number Title Priority Date Filing Date
EP97102947A Expired - Lifetime EP0860605B1 (de) 1997-02-22 1997-02-22 Maschine mit niedrigem Lärmpegel und Verfahren zum Zusammenbau
EP02022063A Expired - Lifetime EP1270927B1 (de) 1997-02-22 1997-02-22 Brennkraftmaschine mit niedrigem Lärmpegel

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP02022063A Expired - Lifetime EP1270927B1 (de) 1997-02-22 1997-02-22 Brennkraftmaschine mit niedrigem Lärmpegel

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EP (2) EP0860605B1 (de)
DE (1) DE69722372T2 (de)

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GB2333810A (en) * 1998-01-31 1999-08-04 Lucas France A cover for a fuel pump
GB2350864A (en) * 1999-06-07 2000-12-13 Perkins Engines Co Ltd Containment and support assembly, eg for an engine or gearbox, with a rigid framework and lower density outer casing
JP2013520604A (ja) * 2010-02-23 2013-06-06 シロー インダストリーズ インコーポレイテッド 自動車燃料噴射ポンプのための吸音カバー
CN103061884A (zh) * 2013-01-28 2013-04-24 无锡朴业橡塑有限公司 具有隔音、隔热性能的车用发动机防火墙
DE102014214884A1 (de) * 2014-07-29 2016-03-03 Volkswagen Aktiengesellschaft Schallschutzabdeckung und Verbrennungsmotor
IT202000005560A1 (it) * 2020-03-16 2021-09-16 Bosch Gmbh Robert Gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna
KR102591333B1 (ko) * 2020-12-11 2023-10-20 엔브이에이치코리아(주) 고압연료펌프용 흡차음커버

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GB1228621A (de) * 1967-11-10 1971-04-15
US3684053A (en) * 1970-09-02 1972-08-15 List Hans Internal combustion engine with sound-absorbing casing
GB2094948A (en) * 1981-03-13 1982-09-22 Massey Ferguson Perkins Ltd Sound deadening
CA1240963A (en) * 1983-03-09 1988-08-23 Tadashi Hanaoka Heat utilizing system using internal combustion engine
EP0341330A1 (de) * 1988-05-11 1989-11-15 Essex Composite Systems Verstärkungseinlegeteil für ein Bauelement und Verfahren zu dessen Herstellung und Verwendung desselben
JPH02181034A (ja) * 1989-01-04 1990-07-13 Yanmar Diesel Engine Co Ltd エンジンの防音カバー
JPH0495631U (de) 1991-01-16 1992-08-19
JP2603223Y2 (ja) 1992-02-07 2000-03-06 株式会社スリーボンド エンジンシリンダーブロックのサイドカバー
US5266133A (en) * 1993-02-17 1993-11-30 Sika Corporation Dry expansible sealant and baffle composition and product
AT403945B (de) * 1994-07-07 1998-06-25 Steyr Nutzfahrzeuge Teilgekapselte brennkraftmaschine

Also Published As

Publication number Publication date
EP1270927A1 (de) 2003-01-02
DE69722372D1 (de) 2003-07-03
DE69722372T2 (de) 2004-04-01
EP0860605A1 (de) 1998-08-26
EP1270927B1 (de) 2004-06-02

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