CN101131106A - Engine cavaera sealing structure with noise-reducing function - Google Patents
Engine cavaera sealing structure with noise-reducing function Download PDFInfo
- Publication number
- CN101131106A CN101131106A CNA2007100927489A CN200710092748A CN101131106A CN 101131106 A CN101131106 A CN 101131106A CN A2007100927489 A CNA2007100927489 A CN A2007100927489A CN 200710092748 A CN200710092748 A CN 200710092748A CN 101131106 A CN101131106 A CN 101131106A
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- CN
- China
- Prior art keywords
- cylinder head
- sealing gasket
- valve mechanism
- mechanism cover
- fixed length
- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/006—Camshaft or pushrod housings
- F02F2007/0063—Head bolts; Arrangements of cylinder head bolts
Abstract
The present invention proposes one kind of engine valve chamber sealing structure with noise reducing effect. The engine valve chamber sealing structure includes one cylinder head hood, one sealing gasket, one cylinder head, one fixed length pin and one shock pad. The fixed length pin inside the installation hole for connecting the cylinder head hood and the cylinder head has its upper end penetrating the shock pad closing the cylinder head hood and lower end penetrating the sealing gasket extruded between the cylinder head hood and the cylinder head. The screw bolt penetrates the fixed length pin to assemble the cylinder head hood onto the cylinder head and has head pressing the shock pad. The said structure can raise the sealing effect of the engine valve chamber, reduce the noise of the gas distributing mechanism and the vibration of the engine and raise the NVH performance of engine.
Description
Technical field
The present invention relates to the sealing system of motor.
Background technique
In the available engine sealing system, the sealing configuration of valve cage is very important.The sealing of valve cage is to finish with combining of cylinder head by valve mechanism cover, sealing gasket, positioning boss.Wherein the processing of positioning boss is relatively more crucial, if the simple forging type that adopts, casting technique is difficult for guaranteeing required dimensional accuracy and the planeness of boss, if the machining mode is adopted in the casting back, though can guarantee required size precision and planeness, install and fix the comparison difficulty, need the special anchor clamps of making to carry out clamping and fix, and machining is longer man-hour, becomes the bottleneck of restriction ordinary production.Therefore owing to be subjected to the manufacturing technology level restriction, the boss of positioning cylinder housing sealing gasket is difficult for guaranteeing the conformity of height on the valve mechanism cover, easily causes between valve mechanism cover and the cylinder head poorly sealedly, and oil impregnate takes place.Existing sealing configuration is to be connected firmly with cylinder head by valve mechanism cover simultaneously, and damping effect is bad, and except that self is easy to generate noise, can not intercept the noise that distribution device sends, and causes NVH higher, and then influences the complete machine performance of motor.
Summary of the invention
The objective of the invention is to defective, propose a kind of engine valve chamber sealing configuration of tool noise reduction effect, improve the seal degree between valve mechanism cover and the cylinder head, and increase the damping of sealing configuration and reduce noise performance at the prior art existence.
Technological scheme of the present invention is as follows:
A kind of engine valve chamber sealing configuration of tool noise reduction effect comprises valve mechanism cover, sealing gasket, cylinder head, fixed length pin and beam.Wherein the fixed length pin is assemblied in the pilot hole of valve mechanism cover connection cylinder head, it passes beam and sealing gasket respectively in two ends up and down, sealing gasket is stuck in the draw-in groove of valve mechanism cover, beam is close on the valve mechanism cover, bolt is from passing the fixed length pin, and pierces in the pilot hole of cylinder head, and valve mechanism cover is assembled on the cylinder head, sealing gasket is compressed between valve mechanism cover and the cylinder head, and the head of bolt is pressed on the beam.
This sealing configuration has been cancelled the positioning boss on the valve mechanism cover, has adopted the fixed length pin, and locating stud is easy to processing on technology, and can guarantee higher precision, has guaranteed the required compression height of valve mechanism cover sealing gasket thus.Simultaneously, reducing vibration, improving on the NVH of the system performance, increased beam, make to form between valve mechanism cover and the cylinder head to be flexible coupling, behind engine start, the oscillating action that is produced is behind the cylinder cover, beam is produced the reciprocating force that frequency differs, the hysteresis of beam can the damped vibration impact force, and damping capacity plays the effect that slows down vibration, raising NVH performance simultaneously, the performance of motor is better brought into play, also effectively guaranteed working life.
In order to reach best sealing and damping effect, the size of fixed length pin and beam, sealing gasket and draw-in groove also should satisfy following relation:
ΔL1/L1＝0.07；
ΔL2/L2＝0.19；
L4/L2＞0.6；
(L1-ΔL1)+(L2-ΔL2)＝L-L3；
Wherein, L is the length of fixed length pin, is used for determining the height overall that compresses of beam and sealing gasket;
L1, L2 are the raw footages of rubber parts beam and sealing gasket, and general beam adopts butyronitrile class rubber, and sealing gasket adopts acrylate rubber;
Δ L1, Δ L2 are the decrements of beam and sealing gasket design
Δ L3 is the wall thickness of valve mechanism cover connection part, and L4 is the degree of depth of draw-in groove.
By adopting said structure, can effectively improve the sealing effect of engine valve chamber, and by adopting the damping noise abatement, weaken the noise that distribution device produces, recording this structure of employing through test can effectively reduce more than the engine noise 0.6dB (A), reduce the excessive vibrating noise of motor, improve the NVH performance of motor and car load.
Description of drawings
Fig. 1 is the sectional drawing of this sealing configuration.
Fig. 2 is the assembling relationship figure of this sealing configuration.
Embodiment
Referring to Fig. 1 and Fig. 2, this sealing configuration comprises by valve mechanism cover 3, sealing gasket 4, cylinder head 6, fixed length pin 5, beam 2 and bolt 1, fixed length pin 5 is thin-wall metal spares, length is L, be used for determining the height overall that compresses of beam 2 and sealing gasket 4, fixed length pin 5 is assemblied in valve mechanism cover 3 and connects in the pilot hole of cylinder head 6, and it passes beam 2 and sealing gasket 4 respectively in two ends up and down, sealing gasket 4 cards 4 are in the draw-in groove of valve mechanism cover 3, and the degree of depth of draw-in groove is L4.Beam 2 is close on the valve mechanism cover 3, and the wall thickness of valve mechanism cover connection part is Δ L3.The raw footage of beam 2 and sealing gasket is respectively L1, L2, and the decrement of design is respectively Δ L1, Δ L2, and beam 2 adopts butyronitrile class rubber, and sealing gasket 4 adopts acrylate rubber.Bolt 1 is from passing fixed length pin 5, and pierces in the pilot hole of cylinder head 6, and valve mechanism cover 3 is assembled on the cylinder head 6, and sealing gasket 4 is compressed between valve mechanism cover and the cylinder head, and the head of bolt 1 is pressed on the beam 2.
Fixed length pin 5 satisfies following relation with the size of beam 2, sealing gasket 4 and draw-in groove:
ΔL1/L1＝0.07；
ΔL2/L2＝0.19；
L4/L2＞0.6；
(L1-ΔL1)+(L2-ΔL2)＝L-L3；
Claims (2)
1. the engine valve chamber sealing configuration of a tool noise reduction effect, comprise valve mechanism cover, sealing gasket and cylinder head, it is characterized in that: also include fixed length pin and beam, the fixed length pin is assemblied in valve mechanism cover and connects in the pilot hole of cylinder head, it passes beam and sealing gasket respectively in two ends up and down, sealing gasket is stuck in the draw-in groove of valve mechanism cover, beam is close on the valve mechanism cover, bolt is from passing the fixed length pin, and pierce in the pilot hole of cylinder head, valve mechanism cover is assembled on the cylinder head, and sealing gasket is compressed between valve mechanism cover and the cylinder head, and the head of bolt is pressed on the beam.
2. the engine valve chamber sealing configuration of tool noise reduction effect according to claim 1 is characterized in that: the size of fixed length pin and beam, sealing gasket and draw-in groove should satisfy relation:
ΔL1/L1＝0.07；
ΔL2/L2＝0.19；
L4/L2＞0.6；
(L1-ΔL1)+(L2-ΔL2)＝L-L3；
Wherein, L is the length of fixed length pin, and L1, L2 are the raw footages of beam and sealing gasket, and L3 is the wall thickness of valve mechanism cover connection part, and L4 is the degree of depth of draw-in groove, and Δ L1, Δ L2 are the decrements of beam and sealing gasket design.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100927489A CN101131106A (en) | 2007-09-25 | 2007-09-25 | Engine cavaera sealing structure with noise-reducing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100927489A CN101131106A (en) | 2007-09-25 | 2007-09-25 | Engine cavaera sealing structure with noise-reducing function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101131106A true CN101131106A (en) | 2008-02-27 |
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ID=39128489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100927489A Pending CN101131106A (en) | 2007-09-25 | 2007-09-25 | Engine cavaera sealing structure with noise-reducing function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101131106A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105345455A (en) * | 2015-09-23 | 2016-02-24 | 重庆坤恩机电技术有限公司 | Full-automatic assembly and detection production line for cylinder caps |
| CN107676190A (en) * | 2017-10-31 | 2018-02-09 | 广西玉柴机器股份有限公司 | A kind of mounting structure of valve mechanism cover |
| CN116391083A (en) * | 2020-10-30 | 2023-07-04 | 欧米科技公司 | Screw with undercrown coating |
-
2007
- 2007-09-25 CN CNA2007100927489A patent/CN101131106A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105345455A (en) * | 2015-09-23 | 2016-02-24 | 重庆坤恩机电技术有限公司 | Full-automatic assembly and detection production line for cylinder caps |
| CN105345455B (en) * | 2015-09-23 | 2018-01-23 | 重庆坤恩机电技术有限公司 | Cylinder cover automatically assembles detection production line |
| CN107676190A (en) * | 2017-10-31 | 2018-02-09 | 广西玉柴机器股份有限公司 | A kind of mounting structure of valve mechanism cover |
| CN116391083A (en) * | 2020-10-30 | 2023-07-04 | 欧米科技公司 | Screw with undercrown coating |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |