CN104564342B - Sound-insulating structure of internal combustion engine - Google Patents
Sound-insulating structure of internal combustion engine Download PDFInfo
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- CN104564342B CN104564342B CN201410558103.XA CN201410558103A CN104564342B CN 104564342 B CN104564342 B CN 104564342B CN 201410558103 A CN201410558103 A CN 201410558103A CN 104564342 B CN104564342 B CN 104564342B
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- Prior art keywords
- combustion engine
- sound
- internal
- high pressure
- under high
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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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
- F02M55/025—Common rails
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- 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
- F02M2200/302—Fuel-injection apparatus having mechanical parts, the movement of which is damped using electrical 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
- F02M2200/90—Selection of particular materials
- F02M2200/9015—Elastomeric or plastic materials
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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)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
A sound-insulating structure of an internal combustion engine can effectively suppress vibration and noises and simply complete assembly operation. An engine cover (20) includes: a cover body (32) configured at an outer side of an internal combustion engine body (18) and at least covering a portion of the internal combustion engine body (18); and a foaming sound-insulating part (34) prepared by foaming materials and installed on a surface (33), opposite to the internal combustion engine body (18), of the cover body (32), wherein at least one end side, relative to an ejector (22), of the foaming sound-insulating part (34) is designed to be abutted with a ventilation chamber (28), the other end side, relative to the ejector (22), of the foaming sound-insulating part (34) is designed to be abutted with a common rail (24) supplying the ejector (22) with fuel via a fuel tubing (26), a gap (40) is disposed between the ejector and a cylinder head cover (14), and a separation piece (42) separated from the cover body (32) and prepared by the foaming materials identical with the foaming sound-insulating part (34) is clamped in the gap (40).
Description
Technical field
The present invention relates to have the sound-insulating structure of the internal combustion engine of cover main body and foaming sound-proof part.
Background technology
As the sound-insulating structure of internal combustion engine, for example, Patent Document 1 discloses and cover from the valve mechanism cover of electromotor
The blimp of the scope of the top of top to the fuel-injection pump in front of car body.The blimp by resinous outside cap assembly and
The inner side sound-insulating member for being fixed on the polyurethane of the inner side of outside cap assembly is constituted.
Sound-insulating structure disclosed in patent documentation 1 is configured to, and using blimp the top of the high press fit pipes such as common rail is covered, and
And, a side of inner side sound-insulating member abuts with cooling water pipe, while the another side of inner side sound-insulating member is supported with valve mechanism cover
Connect.
Patent documentation 1：No. 4284780 publications of Japanese Patent Publication No.
However, in the sound-insulating structure disclosed in patent documentation 1, being provided without for example sending the ejector of fuel ejection sound
The structure surrounded and fully seal with the fuel distribution tube system of transmission vibration.Thus, for example, fuel spray sound possibly through
The gap formed between common rail and housing, and leak into outside.
In this case, it is considered to using sound-insulating member being for example separately constructed with inner side sound-insulating member etc. be blocked in common rail and
The gap formed between housing.However, it is necessary to be used to install the installing component of sound-insulating member, increased assembling procedure and assemble simultaneously
Operation is complicated.
The content of the invention
The present invention be in view of the aspect and complete, its object is to provide a kind of sound-insulating structure of internal combustion engine, its energy
It is enough effectively to suppress vibration and noise, and easily complete assembling operation.
To reach the purpose, the present invention is a kind of sound-insulating structure of internal combustion engine, and it has：Cover main body, it is configured in interior
The outside of combustion engine main body, and at least cover a part for the body of the internal-combustion engine；With foaming sound-proof part, it is by expanded material system
Into on the face opposed with the body of the internal-combustion engine of the cover main body, it is characterised in that the cover main body be configured in every
Open the position that predetermined distance ground at least covers the fuel under high pressure injection apparatus on the body of the internal-combustion engine, the foaming sound-proof
An at least side relative to the fuel under high pressure injection apparatus of part is configured to be abutted with the body of the internal-combustion engine, described
The another side relative to the fuel under high pressure injection apparatus of foaming sound-proof part be configured to via fuel under high pressure pipe arrangement
The fuel under high pressure supply unit for supplying fuel to the fuel under high pressure injection apparatus is abutted, in the fuel under high pressure supply unit and described
Gap is provided between body of the internal-combustion engine, the other foaming sound-proofs constituted with the cover main body split are clamped with the gap
Part.
According to the present invention, by vibration and the larger fuel under high pressure injection apparatus of noise ratio in the structural element by internal combustion engine
And the top of fuel under high pressure supply unit is covered using foaming sound-proof part, can carry out sound insulation, also, by will be by from high compression ignition
Material injection apparatus deliver the gap profit between the fuel under high pressure supply unit of vibration and body of the internal-combustion engine via fuel under high pressure pipe arrangement
Blocked with other foaming sound-proof parts, will can be surrounded as the fuel under high pressure supply unit of vibration generation source.Its result is,
In the present invention, vibration can be avoided from transmitting into car room, and can be effectively prevented to outside leakage sound.
Also, according to the present invention, by sandwich between fuel under high pressure supply unit and body of the internal-combustion engine other foaming every
Line part, can easily be fixed.Therefore, there is no need to other installing component etc., it is suppressed that number of components increases, while
Waste treatment can be efficiently carried out, and, assembling operation can be improved with cheap structure.
Also, it is a feature of the present invention that being formed with through hole on other foaming sound-proof parts, pass through described
Through the secure component being inserted with for the fuel under high pressure supply unit to be fixed on the body of the internal-combustion engine in through hole.
According to the present invention, by running through insertion in the through hole of other foaming sound-proof parts by fuel under high pressure supply unit
The secure component being anchored on body of the internal-combustion engine, as one man substantially can simultaneously assemble with the assembling procedure of fuel under high pressure supply unit
And fixed others foaming sound-proof part.Therefore, it is possible to improve assembling operation, and can easily load and unload other foaming
Sound-insulating member, easily carries out the replacing of new other foaming sound-proof parts.Also, due to other foaming sound-proof parts
Handling operation is easy, so cause the probability damaged little other foaming sound-proof parts in handling operation, can be effective
Recycled.
And, it is a feature of the present invention that being formed with switch-in part on other foaming sound-proof parts, cut described
Enter the secure component being inserted with portion for the fuel under high pressure supply unit to be fixed on the body of the internal-combustion engine.
According to the present invention, by the way that fuel under high pressure is supplied along the switch-in part press-in formed on other foaming sound-proof parts
The secure component being anchored on to portion on body of the internal-combustion engine, can assemble and fixed others foaming sound-proof part.Therefore, even if not
Unloading fuel under high pressure supply unit also can easily load and unload other foaming sound-proof parts.Also, other foaming sound-proof parts
With elasticity, therefore can prevent from departing from by its elastic force when internal combustion engine is driven, while the peace being able to ensure that in car room
Static stability.
And, it is a feature of the present invention that being provided with the face opposed with the body of the internal-combustion engine of the cover main body
Top has the projection of engaging portion, on the foaming sound-proof part, in position corresponding with the projection gap is formed with, and leads to
Cross be pressed into the projection of the cover main body and foaming sound-proof part described in insertion the gap, and by the foaming sound-proof
Part is installed on the cover main body.
In accordance with the invention it is possible to be fixed using the locking foaming sound-proof part of engaging portion of cover main body, therefore, it is possible to
Improve assembling operation.Also, when cover main body is installed on into internal combustion engine, foaming sound-proof part is abutted and quilt with body of the internal-combustion engine
Keep, therefore foaming sound-proof part is difficult departs from from cover main body, at the same can with simple structure by foaming sound-proof part it is reliable and
Stably it is held in cover main body.
And, it is a feature of the present invention that the sound-insulating structure of the internal combustion engine is described with being anchored on by secure component
On body of the internal-combustion engine by secure component, the foaming sound-proof part relative at least the one of the fuel under high pressure injection apparatus
Side is abutted with described by secure component.
According to the present invention, body of the internal-combustion engine is fastened and fixed to by secure component has fastening firm by secure component
Property, therefore played a role as sound-proof wall by secure component itself, it is possible to increase sound insulation value.In addition, so-called here " tight
Gu part " is equivalent to the breather chamber 28 in such as embodiments of the present invention.
And, it is a feature of the present invention that the internal combustion engine abutted with an at least side of the foaming sound-proof part
Main body is the breather chamber with gas-liquid separation chamber.
According to the present invention, a side of the foaming sound-proof part of cover main body and the breather chamber with gas-liquid separation chamber are installed on
Abut, thus, it is possible to configure cover main body in the way of very close to body of the internal-combustion engine, the miniaturization of body of the internal-combustion engine can be realized.And
And, when in order to ensure the capacity (volume) for specifying along the bent axle axially extended gas-liquid separation chamber of body of the internal-combustion engine,
The contact area increase of cover main body, can stably be fixed.And, by the side and inside that make foaming sound-proof part
The gas-liquid separation chamber for being formed as hollow abuts, it is suppressed that the vibration produced for example in fuel under high pressure injection apparatus is transferred to gas-liquid
Separation chamber and situation about resonating, can be respectively increased noise rejection effect and vibration suppressioning effect.
And, the present invention is a kind of sound-insulating structure of internal combustion engine, and it has：Cover main body, it is configured in body of the internal-combustion engine
Outside, and at least cover a part for the body of the internal-combustion engine；With foaming sound-proof part, it is made up of expanded material, is arranged on
On the face opposed with the body of the internal-combustion engine of the cover main body, it is characterised in that the cover main body is configured in and separates between regulation
The position of the fuel under high pressure injection apparatus on the body of the internal-combustion engine, the phase of the foaming sound-proof part are at least covered every ground
For the another side of the fuel under high pressure injection apparatus be mounted to be compressed and with via fuel under high pressure pipe arrangement to the high pressure
The fuel under high pressure supply unit of fuel injection device supply fuel is abutted, the foaming sound-proof part be formed as being compressed and with so
Abutted by secure component, this is except the foaming sound-proof part being abutted with the fuel under high pressure supply unit by secure component
Another side outside, at the pendant positions of the foaming sound-proof part that is surrounding the fuel under high pressure injection apparatus, by
Secure component be anchored on the body of the internal-combustion engine by secure component, in the fuel under high pressure supply unit and the internal combustion owner
Gap is provided between body, the other foaming sound-proof parts constituted with the cover main body split are compressed and be clamped in the gap
In.
In accordance with the invention it is possible to be more reliably prevented from the noise from fuel under high pressure injection apparatus using foaming sound-proof part
To External leakage, and by further using surround as sound source fuel under high pressure injection apparatus structure, be prevented from from
Noise and vibrate to passenger compartment side transmission that gap between foaming sound-proof part and body of the internal-combustion engine spills.
Also, according to the present invention, by compressing foaming sound-proof part and being connected to the pendant positions of foaming sound-proof part
Be fastened on body of the internal-combustion engine by secure component, the vibration that comes from internal combustion engine transmission when can reduce internal combustion engine operation and make an uproar
Sound, the quietness overall therefore, it is possible to improve vehicle.
And, it is solid by secure component fastening by making foaming sound-proof part itself compress and being connected to according to the present invention
On body of the internal-combustion engine by secure component, it is to avoid due to vibration during internal combustion engine operation temporarily in foaming sound-proof part
The situation in gap is produced and body of the internal-combustion engine between, it is possible to increase sound insulation value.
In addition, " it is in addition to the another side abutted with the fuel under high pressure supply unit of the foaming sound-proof part,
Surround at the pendant positions of the foaming sound-proof part of the fuel under high pressure injection apparatus, be anchored on by secure component described
On body of the internal-combustion engine by secure component " equivalent to the cylinder head 12 in such as embodiments of the present invention, valve mechanism cover 14, with
And transmission chain guard 16 etc..
A kind of sound-insulating structure of internal combustion engine can be obtained in the present invention, and it can effectively suppress vibration and noise, and
Easily complete assembling operation.
Description of the drawings
Fig. 1 is the upper transparent approximate three-dimensional map of the internal combustion engine of the sound-insulating structure of the embodiment for applying invention.
Fig. 2 is the schematic sectional view along car body fore-and-aft direction of the upper side of the internal combustion engine shown in Fig. 1.
(a) of Fig. 3 is the biopsy cavity marker devices top view that hood is observed from foaming sound-proof component side, is (b) to illustrate to be located at
The axonometric chart of the jut of cover main body, (c) be illustrate on foaming sound-proof part formed gap axonometric chart.
Fig. 4 is the axonometric chart of distance piece.
Fig. 5 is the top view of the distance piece shown in Fig. 4.
Fig. 6 is the axonometric chart of the distance piece of variation.
Fig. 7 is the top view of the distance piece shown in Fig. 6.
Fig. 8 is the partial top view for illustrating the state that distance piece is accompanied between common rail and valve mechanism cover.
Fig. 9 is the partial top view for illustrating the state that distance piece is fixed by stud.
Figure 10 is the longitudinal section along the X-x-ray of Fig. 9.
Figure 11 is the longitudinal section along XI-XI lines of Fig. 9.
Figure 12 is the upper side of the internal combustion engine of the sound-insulating structure of the other embodiment for applying the present invention before car body
The schematic sectional view of rear direction.
Figure 13 is to illustrate the top view that the state of fuel distribution tube protection back cover is provided with across the 2nd distance piece.
Figure 14 is the longitudinal section along XIV-XIV lines of Figure 13.
Label declaration
10、10a：Internal combustion engine；
16：Transmission chain guard (by secure component)；
18：Body of the internal-combustion engine；
20：Hood；
22：Ejector (fuel under high pressure injection apparatus)；
24：Common rail (fuel under high pressure supply unit)；
26：Fuel distribution tube；
28：Breather chamber (by secure component)；
30：Gas-liquid separation chamber；
32：Cover main body；
34：Foaming sound-proof part；
36：Jut (projection)；
36b：Engaging portion；
38：Gap；
40：Gap；
42、42a：Distance piece (other foaming sound-proof parts)；
44：Through hole；
48：Stud (secure component)；
54：Switch-in part.
Specific embodiment
Next, suitably referring to the drawings, being described in detail to embodiments of the present invention.Fig. 1 applies invention
The upper transparent approximate three-dimensional map of the internal combustion engine of the sound-insulating structure of embodiment, Fig. 2 is the upper side of the internal combustion engine shown in Fig. 1
Along the schematic sectional view of car body fore-and-aft direction.In addition, before " in front and back " and " upper and lower " expression car body in each figure shown in arrow
Rear direction and above-below direction, " left and right " represents the left and right directions from driver's seat observation.
The internal combustion engine 10 of sound-insulating structure of embodiments of the present invention is applied for example by multi-cylinder direct-injection type Diesel engine
Constitute, it is horizontal to be configured in the power set room of front part of vehicle (not shown).In addition, internal combustion engine 10 is not limited to diesel engine
Machine, for example, also include direct-injection petrol engine etc..
As shown in figure 1, internal combustion engine 10 has：Cylinder head 12, it is incorporated into the upper surface of cylinder block (not shown)；Cylinder head
14 (Fig. 2 references) of cover, it is incorporated into the upper surface of cylinder head 12；And transmission chain guard 16, it is respectively in connection with cylinder block, cylinder
The side wall of lid 12 and valve mechanism cover 14.
These cylinder block, cylinder head 12, valve mechanism cover 14 and transmission chain guard 16 are used as being monolithically fabricated body of the internal-combustion engine 18.Such as
Shown in Fig. 1 and Fig. 2, a part for the upper surface for covering body of the internal-combustion engine 18 is configured with the uppermost position in fig-ure of body of the internal-combustion engine 18
Hood 20.Hood 20 is substantially rectangular shape in top view, by grommets (not shown) detachably
It is held in body of the internal-combustion engine 18.
As shown in Fig. 2 the upper surface in cylinder head 12 is configured with：Multiple ejectors (fuel under high pressure injection apparatus) 22, it
Fuel to each in-cylinder injection high pressure (not shown)；Single common rail (fuel under high pressure supply unit) 24, it is to each ejector 22
The fuel of supply high pressure；And fuel distribution tube (fuel under high pressure pipe arrangement) 26, its be branched off from common rail 24 and with each ejector 22
Connection.
Also, be configured with breather chamber 28 in the upper surface of valve mechanism cover 14, its be located at from ejector 22 have left regulation away from
From vehicle front side, and towards the side of hood 20 top project.Breather chamber 28 is hollow by what is extended along overall width direction
Ducted body is constituted, and is internally provided with gas-liquid separation chamber 30.In addition, in the present embodiment, respectively breather chamber 28 is constituted with split
With cylinder head 12, but this is not limited to, it is also possible to which breather chamber 28 and cylinder head 12 form as one.
As shown in figure 1, common rail 24 is formed by the metal generally cylindrical body extended along overall width direction, axially two
End is fixed on the upper surface of cylinder head 12 via one group of keeper (not shown).Also, common rail 24 is located in top view
Near the rear view of vehicle side of the cylinder head 12 of car room.
Hood 20 has：Cover main body 32, it is formed by resinite, is configured on the outside of body of the internal-combustion engine 18, and at least
Cover a part for body of the internal-combustion engine 18；With foaming sound-proof part 34, it is made up of expanded material, in the inwall of cover main body 32
It is installed on the face opposed with body of the internal-combustion engine 18 of cover main body 32.
(a) of Fig. 3 is the biopsy cavity marker devices top view that hood is observed from foaming sound-proof component side, and (b) of Fig. 3 is to illustrate
Located at the axonometric chart of the jut of cover main body, (c) of Fig. 3 is the axonometric chart for illustrating the gap formed on foaming sound-proof part.
As shown in (b) of Fig. 3, one on the face 33 (with reference to Fig. 2) opposed with body of the internal-combustion engine 18 in cover main body 32
It is conformed with portion's (projection) 36.The jut 36 is made up of following part：Axle portion 36a, its towards from body of the internal-combustion engine 18 pairs
The direction that the face 33 put is left projects；With engaging portion 36b of meniscal-like, it is located at the top of axle portion 36a and edge and axle portion 36a
The vertical direction of axis extend.
On the other hand, shown in (c) of such as Fig. 3, on foaming sound-proof part 34, with the corresponding position of jut 36 via
The depressed part 37 of circular shape is formed with linear gap 38.In this case, by making the projection located at cover main body 32
The press-in of portion 36 and the gap 38 of insertion foaming sound-proof part 34, so as to foaming sound-proof part 34 is integratedly installed on into cover main body 32
(with reference to (a) of Fig. 3).In by making engaging portion 36b of penetrating gap 38 engaging in foaming sound-proof part 34 with cover main body 32
The face 34a of the opposition side of opposed side, and prevent foaming sound-proof part 34 to depart from from cover main body 32.Also, such as Fig. 3
Shown in (a), by prolonging for engaging portion 36b of a part of jut 36 of the change in the multiple juts 36 in cover main body 32
Direction (direction) is stretched, can be reliably prevented cause what jut 36 departed from from gap 38 due to vibration when electromotor operates
Situation.
As shown in Fig. 2 cover main body 32 has：It is shaped generally as flat flat part 32a；Kink 32b, itself and flat board
Portion 32a is continuous and is bent (inclination) in the way of declining to rear view of vehicle side；And sagging wall portion 32c, it connects with kink 32b
Continue and hang down towards direction under vertical.Also, cover main body 32 (flat part 32a) is located at the top of ejector 22, and is configured to
Cover the top of ejector 22 with ejector 22 in the vertical direction with separating predetermined distance.
With the shape of described cover main body 32 accordingly, foaming sound-proof part 34 is by flat part 34a, kink 34b
And sagging wall portion 34c is constituted.
A side (vehicle front side of flat part 34a) on the basis of ejector 22 of foaming sound-proof part 34 is set
Into abutting with the breather chamber 28 for being internally formed gas-liquid separation chamber 30.Also, foaming sound-proof part 34 with ejector 22 as base
Accurate another side (lower end of sagging wall portion 34c) is configured to and the combustion for supplying high pressure to ejector 22 via fuel distribution tube 26
The upper surface part of the common rail 24 of material is abutted.
Gap 40 is provided between the upper surface of the downside of common rail 24 and valve mechanism cover 14.Be clamped with the gap 40 with
The distance piece (other foaming sound-proof parts, the 1st distance piece) 42 that cover main body 32 and the split of foaming sound-proof part 34 are constituted.Between being somebody's turn to do
Spacing body 42 is configured to substantially be put down with the central shaft of common rail 24 by being integrally formed with the identical expanded material of foaming sound-proof part 34
Extend capablely.In addition, in the present embodiment, distance piece 42 by being formed with the identical expanded material of foaming sound-proof part 34, but
As long as sound insulation value is identical with durability, it is also possible to formed using the expanded material different from foaming sound-proof part 34.
Fig. 4 is the axonometric chart of distance piece, and Fig. 5 is the top view of the distance piece shown in Fig. 4, and Fig. 6 is the distance piece of variation
Axonometric chart, Fig. 7 is the top view of the distance piece shown in Fig. 6, and Fig. 8 is to illustrate to accompany distance piece between common rail and valve mechanism cover
State partial top view, Fig. 9 is the partial top view for illustrating the state that distance piece is fixed by stud, Figure 10 be along
The longitudinal section of the X-x-ray of Fig. 9, Figure 11 is the longitudinal section along XI-XI lines of Fig. 9.
As shown in Figures 4 and 5, it is formed with distance piece 42：A pair of through holes 44, they are passed through along roughly vertical direction
It is logical；With multiple curved recessed portions 46, they play a role as the relief portion of the grade of fuel distribution tube 26.Through slotting in the through hole 44
Enter the stud (secure component) 48 having for common rail 24 to be fixed on the upper surface of valve mechanism cover 14.Specifically, as Fig. 8～
Shown in Figure 11, the fastening protrusion portion 50 for being attached to common rail 24 is installed in the through hole 44 of distance piece 42, insertion is fastened convex
The threaded portion 48a of the stud 48 in platform portion 50 is screwed in the screwed hole 14a of valve mechanism cover 14, thus, it is possible to substantially simultaneously by altogether
Rail 24 and distance piece 42 are installed on valve mechanism cover 14.In addition, stud 48 is as the one of the secure component part for exemplifying,
But it is not limited to this.
The distance piece 42 for being installed on valve mechanism cover 14 is held in the gap formed between valve mechanism cover 14 and common rail 24
(with reference to Figure 10 and Figure 11) in 40.In addition, be formed with the side wall of distance piece 42 being supported with a part for the outer peripheral face of common rail 24
The bearing surface 51 (with reference to Fig. 4 and Fig. 5) of the bending for connecing.
As shown in FIG. 6 and 7, in the distance piece 42a of variation, it is characterised in that be formed with the side from distance piece 42a
Wall is communicated to the slot-shaped switch-in part 54 of through hole 44.By from laterally pressing distance piece 42a, by stud 48 along cutting
Enter portion 54 to be pressed into, in the gap 40 being held between common rail 24 and valve mechanism cover 14 so as to distance piece 42a.
The internal combustion engine 10 for applying the sound-insulating structure of present embodiment is constituted substantially as described above, and next it is made
Illustrated with effect.
In the present embodiment, by will in the structural element of internal combustion engine 10 vibration and the larger ejector 22 of noise ratio and
The top of common rail 24 is covered using the foaming sound-proof part 34 for being installed on cover main body 32, can carry out sound insulation, also, by will be by
From ejector 22 via fuel distribution tube 26 deliver gap 40 between the common rail 24 of vibration and valve mechanism cover 14 using by with send out
Distance piece 42 (distance piece 42a) obstruction that bubble sound-insulating member 34 identical expanded material is formed, can be using as vibration generation source
Common rail 24 surround.Its result is in the present embodiment, vibration can be avoided to transmit into car room, and can be effectively
Prevent to outside leakage sound.
Also, in the present embodiment, by sandwiching (the distance piece of distance piece 42 between common rail 24 and valve mechanism cover 14
42a), can easily be fixed.Therefore, there is no need to other installing component etc., it is suppressed that number of components increases, while energy
It is enough efficiently to carry out waste treatment, and, assembling operation can be improved with cheap structure.
And, in the present embodiment, by running through insertion in the through hole 44 being formed on distance piece 42 by common rail
24 are anchored on the stud 48 in valve mechanism cover 14, as one man substantially can assemble simultaneously with the assembling procedure of common rail 24 and solid
Determine distance piece 42.Therefore, it is possible to improve assembling operation, and distance piece 42 can be easily loaded and unloaded by stud 48,
Easily carry out the replacement operation of new distance piece.Also, due to distance piece 42 handling operation easily, so in handling operation
When to distance piece 42 cause damage probability it is little, can effectively be recycled.
And, it is in the present embodiment, by being pressed into along the switch-in part 54 formed on distance piece 42a that common rail 24 is tight
The stud 48 being fixed in valve mechanism cover 14, can assemble and fixation spacers 42a.Therefore, even if not unloading common rail 24
Distance piece 42a itself can easily be loaded and unloaded.Also, distance piece 42a is formed and with elasticity by expanded material, so in internal combustion
Machine can prevent from departing from when being driven by its elastic force, while the quietness being able to ensure that in car room.
And, in the present embodiment, the locking foaming sound-proof part 34 of engaging portion 36b located at cover main body 32 can be utilized
To be easily fixed, therefore, it is possible to improve assembling operation.Also, hood 20 is being installed on into body of the internal-combustion engine 18
When, the flat part 34a of a side of foaming sound-proof part 34 and sagging wall portion 34c of another side respectively with body of the internal-combustion engine 18
A part (breather chamber 28 and common rail 24) abut and be kept, therefore foaming sound-proof part 34 is difficult to from cover main body 32 depart from,
Simultaneously can be reliable by foaming sound-proof part 34 with simple structure and stably it be held in cover main body 32.
And, in the present embodiment, it is installed on a side of the foaming sound-proof part 34 of cover main body 32 and there is gas-liquid
The breather chamber 28 of separation chamber 30 is abutted, thus, it is possible to configure cover main body 32, Neng Goushi in the way of very close to body of the internal-combustion engine 18
The miniaturization of existing body of the internal-combustion engine 18.Also, when the capacity (volume) in order to ensure regulation along body of the internal-combustion engine 18 not
When the axial direction (bent axle axial direction) of the bent axle of diagram is extended gas-liquid separation chamber 30, the contact area increase of cover main body 32 can
Stably it is fixed.And, by making a side of foaming sound-proof part 34 and being internally formed as hollow gas-liquid separation chamber
30 abut, it is suppressed that the vibration produced for example in ejector 22 is transferred to gas-liquid separation chamber 30 and situation about resonating, Neng Goufen
Indescribably high noisy inhibition and vibration suppressioning effect.
And, in the present embodiment, for example, it is fastened and fixed to body of the internal-combustion engine by secure components such as studs
18 breather chamber 28 (by secure component) relative to body of the internal-combustion engine 18 have fastening rigidity, therefore breather chamber 28 itself as every
Sound wall plays a role, it is possible to increase sound insulation value.
In addition, in the present embodiment, employ using the He of foaming sound-proof part 34 for being installed on hood main body 32
The distance piece 42 being clipped in the gap 40 of the upper surface of common rail 24 and valve mechanism cover 14 mainly prevents sound from letting out from around common rail 24
The structure of leakage.
On this basis, in the present embodiment, it is used as by being installed on the covering of foaming sound-proof part 34 of cover main body 32
The ejector 22 of sound source and the entirety of common rail 24 to the supply fuel under high pressure of ejector 22, thus can not only prevent from ejector
22 noise is prevented from the gap between foaming sound-proof part 34 and body of the internal-combustion engine 18 and spills to External leakage
Noise and vibrate to passenger compartment side transmission.
Hereinafter, outside pair position abutted with common rail 24, foaming sound-proof part 34 enters to the encirclement structure of ejector 22
Row explanation.
As shown in Fig. 2 the another side relative to ejector 22 of foaming sound-proof part 34 is abutted with common rail 24, foam every
A side relative to ejector 22 of line part 34 be installed on body of the internal-combustion engine 18 by secure component (not shown)
Breather chamber 28 is abutted.And, as shown in figure 1, it is preferred that making the foaming sound-proof part 34 and internal combustion engine being installed in cover main body 32
Compress and be connected to chain case (by secure component) 16 in the position (pendant positions) of the right side contacts side surfaces of main body 18.
Using such structure, the noise from ejector 22 can be more reliably prevented to External leakage, while can
The vibration from chain case (transmission chain guard 16) and noise when electromotor operates further is reduced, therefore, it is possible to improve vehicle
Overall quietness.
Also, in the left lateral sides (pendant positions) of the body of the internal-combustion engine 18 shown in Fig. 1, preferably with valve mechanism cover (quilt
Secure component) 14 or cylinder head 12 itself (by secure component) or it is fastened and fixed in cylinder head 12 by secure component
Other mold foaming sound-proof part 34 by the mode that secure component (for example, buffer unit etc.) is abutted.
The foaming sound-proof part 34 molding in the way of with the split of cover main body 32 as described above, can be with various internal combustion engines
The as one man easily molding of the shape of 10 (electromotors), therefore by with by the gap between cover main body 32 and body of the internal-combustion engine 18
Mode (mode of the sealing) molding of landfill, it is compared with the past to improve sound insulation value.
On this basis, the ejector 22 as sound source is surrounded by using foaming sound-proof part 34, is prevented from sludge
And around the foreign body such as water immersion ejector 22, therefore, it is possible to improve the durability of ejector 22.
And, it is solid by the fastening of the secure components such as stud by making foaming sound-proof part 34 itself compress and being connected to
On body of the internal-combustion engine 18 by secure component, it is to avoid due to vibration when electromotor operates temporarily in foaming sound-proof portion
The situation in gap is produced between part 34 and body of the internal-combustion engine 18, it is possible to increase sound insulation value.
Next, figure 12 illustrates the internal combustion engine 10a of the sound-insulating structure of the other embodiment for applying the present invention.Figure
12 is the showing along car body fore-and-aft direction of the upper side of the internal combustion engine of the sound-insulating structure of the other embodiment for applying the present invention
Meaning sectional view.In addition, in embodiment described below, pair tie with the embodiment identical shown in Fig. 1～Figure 11
Structure key element is marked with identical reference numeral, and omits detail explanation.
As shown in figure 12, in the internal combustion engine 10a of the sound-insulating structure for applying other embodiment, difference is to incite somebody to action
Sagging wall portion 32c of the cover main body 32 of the rear view of vehicle side located at hood 20 in the embodiment and foaming sound-proof portion
Sagging wall portion 34c of part 34 is separated in the way of split constituted respectively, and is made up of electromotor overhead guard 60 and electromotor back cover 62
Hood 20.
By the way that electromotor overhead guard 60 and electromotor back cover 62 are formed as into segmenting structure, it is possible to increase for layout respectively not
The vehicle installation of same various internal combustion engines 10.In addition, being installed on the foaming sound-proof part 34b of electromotor overhead guard 60 and being installed on
Caused by the mating surface 64 of the foaming sound-proof part 34c of electromotor back cover 62 is for example in order to prevent foozle or assembly error etc.
Leakage sound, and be formed as concave surface and convex surface with incorporated labyrinth structure.
Figure 13 is to illustrate the top view that the state of fuel distribution tube protection back cover is provided with across the 2nd distance piece, Tu14Shi
Along the longitudinal section of XIV-XIV lines of Figure 13.
As shown in FIG. 13 and 14, it is also possible to set up resinous fuel distribution tube protection back cover 70, and never scheming
The high-pressure pump for showing is supplied after the fuel supplying tubing 27 (with reference to Figure 13) and fuel distribution tube protection use of the fuel of high pressure to common rail 24
Cover 70 between, accompany by the identical expanded material of the 1st distance piece 42 formed and constituted with the split of the 1st distance piece 42 the 2nd between
Spacing body 72.
In such manner, it is possible to using the protection of the 2nd distance piece 72 fuel supplying tubing 27, at the same can by the 2nd distance piece 72 with
Common rail 24 abuts to surround common rail 24, can further improve sound-proofing.
In addition, as being installed on the foaming sound-proof part 34b of electromotor overhead guard 60 and being installed on the foaming of electromotor back cover 62
Like that, cover main body 32 itself is not fastened and fixed to electromotor for the mating surface 64 of sound-insulating member 34c, foaming sound-proof part 34b,
In the case that 34c both sides have the elastic force as elastomeric element, if both contacts, also will not when electromotor operates
Gap is produced, therefore need not closely be positioned etc., it is possible to increase assembling operation.
Claims (6)
1. a kind of sound-insulating structure of internal combustion engine, it has：Cover main body, it is configured in the outside of body of the internal-combustion engine, and at least covers
A part for the body of the internal-combustion engine；With foaming sound-proof part, it is made up of expanded material, installed in the cover main body and institute
State on the opposed face of body of the internal-combustion engine, the sound-insulating structure of the internal combustion engine is characterised by,
The cover main body is configured in and separates the fuel under high pressure injection that predetermined distance ground is at least covered on the body of the internal-combustion engine
The position of device,
An at least side relative to the fuel under high pressure injection apparatus of the foaming sound-proof part is configured to interior with described
Combustion engine main body is abutted,
The another side relative to the fuel under high pressure injection apparatus of the foaming sound-proof part be configured to via high pressure
Fuel distribution tube to the fuel under high pressure supply unit that the fuel under high pressure injection apparatus supply fuel is abutted,
Gap is provided between the fuel under high pressure supply unit and the body of the internal-combustion engine,
The other foaming sound-proof parts constituted with the cover main body split are clamped with the gap,
Through hole is formed with other foaming sound-proof parts,
Run through in the through hole and be inserted with for the fuel under high pressure supply unit to be fixed on the body of the internal-combustion engine
Secure component.
2. a kind of sound-insulating structure of internal combustion engine, it has：Cover main body, it is configured in the outside of body of the internal-combustion engine, and at least covers
A part for the body of the internal-combustion engine；With foaming sound-proof part, it is made up of expanded material, installed in the cover main body and institute
State on the opposed face of body of the internal-combustion engine, the sound-insulating structure of the internal combustion engine is characterised by,
The cover main body is configured in and separates the fuel under high pressure injection that predetermined distance ground is at least covered on the body of the internal-combustion engine
The position of device,
An at least side relative to the fuel under high pressure injection apparatus of the foaming sound-proof part is configured to interior with described
Combustion engine main body is abutted,
The another side relative to the fuel under high pressure injection apparatus of the foaming sound-proof part be configured to via high pressure
Fuel distribution tube to the fuel under high pressure supply unit that the fuel under high pressure injection apparatus supply fuel is abutted,
Gap is provided between the fuel under high pressure supply unit and the body of the internal-combustion engine,
The other foaming sound-proof parts constituted with the cover main body split are clamped with the gap,
Switch-in part is formed with other foaming sound-proof parts,
The fastening for the fuel under high pressure supply unit to be fixed on the body of the internal-combustion engine is inserted with the switch-in part
Part.
3. the sound-insulating structure of internal combustion engine according to claim 1 and 2, it is characterised in that
The projection that there is engaging portion at top is provided with the face opposed with the body of the internal-combustion engine of the cover main body,
On the foaming sound-proof part, gap is formed with position corresponding with the projection,
The gap of simultaneously foaming sound-proof part described in insertion is pressed into by making the projection of the cover main body, and by described
Bubble sound-insulating member is installed on the cover main body.
4. the sound-insulating structure of internal combustion engine according to claim 1 and 2, it is characterised in that
The sound-insulating structure of the internal combustion engine have by secure component be anchored on the body of the internal-combustion engine by secure component,
An at least side relative to the fuel under high pressure injection apparatus of the foaming sound-proof part is with described by secure component
Abut.
5. the sound-insulating structure of internal combustion engine according to claim 1 and 2, it is characterised in that
The body of the internal-combustion engine abutted with an at least side of the foaming sound-proof part is the ventilation with gas-liquid separation chamber
Room.
6. the sound-insulating structure of internal combustion engine according to claim 1 and 2, it is characterised in that
The another side relative to the fuel under high pressure injection apparatus of the foaming sound-proof part be mounted to be compressed and with height
Pressurized fuel supply unit is abutted,
The foaming sound-proof part is compressed and is abutted by secure component with such, and this is except the foaming by secure component
It is outside the another side abutted with the fuel under high pressure supply unit of sound-insulating member, the encirclement fuel under high pressure injection apparatus
At the pendant positions of the foaming sound-proof part, by the secure component be anchored on the body of the internal-combustion engine by fastening part
Part.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013222007A JP5845231B2 (en) | 2013-10-25 | 2013-10-25 | Soundproof structure of internal combustion engine |
| JPJP2013-222007 | 2013-10-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104564342A CN104564342A (en) | 2015-04-29 |
| CN104564342B true CN104564342B (en) | 2017-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410558103.XA Active CN104564342B (en) | 2013-10-25 | 2014-10-20 | Sound-insulating structure of internal combustion engine |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5845231B2 (en) |
| CN (1) | CN104564342B (en) |
| DE (1) | DE102014221662B4 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107524520A (en) * | 2017-08-18 | 2017-12-29 | 奇瑞汽车股份有限公司 | The denoising structure of fuel injector |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180003108A1 (en) * | 2015-02-02 | 2018-01-04 | Honda Motor Co., Ltd. | Sound insulation structure of internal combustion engine |
| JP6274241B2 (en) * | 2016-03-29 | 2018-02-07 | マツダ株式会社 | Engine heat insulation structure |
| CN105927386A (en) * | 2016-04-28 | 2016-09-07 | 重庆长安汽车股份有限公司 | High-pressure oil rail sound insulation structure of supercharged direct-injection engine |
| JP6939621B2 (en) * | 2018-02-09 | 2021-09-22 | トヨタ自動車株式会社 | Engine cover |
| DE102018107805A1 (en) | 2018-04-03 | 2018-05-24 | FEV Europe GmbH | Cover with a movable cover body for sound shielding an undercut of an accessory of a prime mover |
| JP2021174882A (en) * | 2020-04-24 | 2021-11-01 | 株式会社デンソー | Waterproof case for automobile, photocurable silicone composition and silicone gel |
| US11959415B2 (en) | 2022-01-07 | 2024-04-16 | Honda Motor Co., Ltd. | Internal combustion engine fitted with engine cover |
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| JP2996523B2 (en) | 1991-03-14 | 2000-01-11 | キヤノン株式会社 | Image processing method |
| JP2559534Y2 (en) * | 1992-04-08 | 1998-01-19 | いすゞ自動車株式会社 | Engine soundproof cover |
| JP3077477B2 (en) * | 1993-10-30 | 2000-08-14 | スズキ株式会社 | Head cover structure |
| DE19629307A1 (en) * | 1996-07-20 | 1998-01-22 | Daimler Benz Ag | Soundproofing cover for an internal combustion engine with cooling air blower |
| JPH11210488A (en) * | 1998-01-28 | 1999-08-03 | Mazda Motor Corp | Protecting device for fuel pump |
| JP3791737B2 (en) * | 1999-01-29 | 2006-06-28 | スズキ株式会社 | Engine cylinder head cover |
| JP4284780B2 (en) * | 1999-09-29 | 2009-06-24 | マツダ株式会社 | Sound insulation structure of horizontally mounted engine |
| JP4238510B2 (en) * | 2002-03-18 | 2009-03-18 | マツダ株式会社 | Engine sound insulation structure |
| JP2005264790A (en) * | 2004-03-17 | 2005-09-29 | Tokai Rubber Ind Ltd | Sound insulation cover |
| JP4523323B2 (en) * | 2004-04-20 | 2010-08-11 | 本田技研工業株式会社 | Soundproof structure in power unit |
| JP2006257993A (en) * | 2005-03-17 | 2006-09-28 | Tokai Rubber Ind Ltd | Soundproof cover |
| JP2007114617A (en) * | 2005-10-21 | 2007-05-10 | Tokai Rubber Ind Ltd | Sound absorbing cover |
| JP2007177753A (en) * | 2005-12-28 | 2007-07-12 | Toyota Motor Corp | Sound insulating structure for internal combustion engine |
| JP2007198312A (en) * | 2006-01-27 | 2007-08-09 | Tokai Rubber Ind Ltd | Soundproof cover |
| JP4852019B2 (en) * | 2007-10-31 | 2012-01-11 | 東海ゴム工業株式会社 | Gap blocking structure |
| JP2012122424A (en) * | 2010-12-09 | 2012-06-28 | Kasai Kogyo Co Ltd | Mounting structure of soundproof cover |
| JP5654926B2 (en) * | 2011-03-30 | 2015-01-14 | 住友理工株式会社 | Engine cover and engine soundproof structure |
| JP2014095314A (en) * | 2012-11-08 | 2014-05-22 | Honda Motor Co Ltd | Cover structure of internal combustion engine |
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2013
- 2013-10-25 JP JP2013222007A patent/JP5845231B2/en active Active
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2014
- 2014-10-20 CN CN201410558103.XA patent/CN104564342B/en active Active
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107524520A (en) * | 2017-08-18 | 2017-12-29 | 奇瑞汽车股份有限公司 | The denoising structure of fuel injector |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2015083788A (en) | 2015-04-30 |
| JP5845231B2 (en) | 2016-01-20 |
| DE102014221662B4 (en) | 2015-09-24 |
| DE102014221662A1 (en) | 2015-04-30 |
| CN104564342A (en) | 2015-04-29 |
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