CN103912329B - It is easy to substitute the internal combustion engine of rocker arm shaft - Google Patents
It is easy to substitute the internal combustion engine of rocker arm shaft Download PDFInfo
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- CN103912329B CN103912329B CN201310002836.0A CN201310002836A CN103912329B CN 103912329 B CN103912329 B CN 103912329B CN 201310002836 A CN201310002836 A CN 201310002836A CN 103912329 B CN103912329 B CN 103912329B
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- rocker arm
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Abstract
A kind of internal combustion engine for being easy to substitute rocker arm shaft, includes a cylinder unit, a swing arm unit, and a valve unit.The cylinder unit includes a cylinder, and one is arranged on cylinder head on the cylinder.The swing arm unit includes support base, the rocker arm shaft for being fed through the support base and being positioned on the support base integrally extended from the direction of the cylinder head to the opposite cylinder, and the rocking arm for being hubbed on the rocker arm shaft, the support base has two perforation relative to each other, and grade perforation is engaged the passage to form a both ends open and be worn for the rocker arm shaft.Because the passage of the support base is both ends open, thus the swing arm unit rocker arm shaft can selectivity from either end be inserted or pulled out the passage, it is convenient that the rocker arm shaft is detached and the rocking arm or multiple liners of the valve unit are replaced.
Description
Technical field
The present invention particularly relates to a kind of internal combustion engine for being easy to substitute rocker arm shaft on a kind of internal combustion engine.
Background technology
Refering to Fig. 1 and Fig. 2, it is new to be that TaiWan, China announces No. 559217 " rocker arm support of overhead camshaft engine "
Patent Case, the rocker arm support 12 is included is located at the bearing block 121 by a bearing block 121, one lid of the one extension of a cylinder head 11
On bearing cap 122, the intake rocker axle 123 being embedded on the bearing cap 122, an exhaust rocker arm axle 124, one be hubbed on this
Intake rocker 125 on intake rocker axle 123, and one be hubbed on exhaust rocker arm 126 on the exhaust rocker arm axle 124, wherein, should
The peace that four and two-by-two one group are formed with bearing cap 122 and is worn respectively for the intake rocker axle 123, exhaust rocker arm axle 124
Fill hole 127.
In assembling, first it is provided with the camshaft 13 of a sprocket wheel 131 by one and is placed on the bearing block 121, then with air inlet
Exemplified by side, intake rocker axle 123 is penetrated into the grade towards the direction away from the sprocket wheel 131 by the sprocket wheel 131 of the camshaft 13 and installed
In hole 127, while the intake rocker 125 is inserted in into the intake rocker axle 123, and the intake rocker axle is inserted using a bolt 14
123, prevent the intake rocker axle 123 from rotating and sliding；Similarly, the exhaust rocker arm axle 124 is also installed with same way is used in combination
Another bolt 14 is fixed, finally again that the bearing cap 122 and bearing block 121 is sealed so that the camshaft 13 can drive when rotating
The intake rocker 125, exhaust rocker arm 126 are swung, and are oppressed corresponding multiple valve rods 15 respectively and opened and closed, and reach the work(of inlet and outlet
Energy.
But after said elements assembling, the grade mounting hole 127 can be blocked by the sprocket wheel 131 of the camshaft 13, so when this enters
Gas rocking arm 125 or the abrasion of exhaust rocker arm 126 will be changed, can be by the air inlet after need to removing the camshaft 13 or sprocket wheel 131
Rocker arm shaft 123 or exhaust rocker arm axle 124 are extracted out, therefore numerous in the operation for changing the intake rocker 125 or exhaust rocker arm 126
It is miscellaneous, and the chain (not shown) being now set on sprocket wheel 131 also can be relaxed or even fallen in crankcase (not shown), therefore
Replace with need it is especially careful note, and also to carry out the action of timing after assembling, cause to maintain, all suitable inconvenience in maintenance.
The content of the invention
Therefore, the purpose of the present invention, that is, be to provide a kind of simplified assembling formality and for ease of maintenaince, maintenance be easy to substitute
The internal combustion engine of rocker arm shaft.
Then, the present invention is easy to substitute the internal combustion engine of rocker arm shaft, includes a cylinder unit, a swing arm unit, and one
Valve unit.
The cylinder unit includes a cylinder, and one is arranged on cylinder head on the cylinder, and the cylinder is formed with cylinder head
One combustion chamber, the cylinder head has an air flue for connecting the combustion chamber.
The swing arm unit includes one, and from the cylinder head to the direction of the opposite cylinder, integrally the support base of extension, one are fed through
The support base and the rocker arm shaft being positioned on the support base, and a rocking arm for being hubbed on the rocker arm shaft, the support base have two
Perforation relative to each other, grade perforation is engaged the passage to form a both ends open and be worn for the rocker arm shaft.
The valve unit include one stretch through the valve rod of the cylinder head, one be sheathed on resetting-mechanism on the valve rod, and one
With the resetting-mechanism and the liner of the valve stem contacts, the valve rod has one to be used to opening and closing the valve face end of the air flue, and one by the valve
Face end extends and is arranged in the valve foot of the cylinder head, and the resetting-mechanism has a retainer for being fixedly arranged on the valve foot, and one
It is set in the valve foot and two ends acts against the elastic component of the retainer and cylinder head respectively, the liner is to be contained in the retainer
It is interior and contacted with the valve foot, and pushed for the rocking arm of the swing arm unit.
Effect of the present invention is：Because the passage of the support base is both ends open, therefore the rocker arm shaft of the swing arm unit
Can selectivity be inserted or pulled out the passage from either end, it is convenient the rocker arm shaft is detached and the rocking arm or the valve list is replaced
Multiple liners of member.
Brief description of the drawings
Fig. 1 is a stereogram, illustrates that TaiWan, China is announced No. 559217 " rocker arm support of overhead camshaft engine "
New patent case；
Fig. 2 is a three-dimensional exploded view, aids in illustrating Fig. 1 rocker arm support；
Fig. 3 is a part of stereogram, illustrates that the one first of the internal combustion engine of the invention for being easy to substitute rocker arm shaft is preferably real
Example is applied, wherein clipped element for convenience of description；
Fig. 4 is a sectional view, illustrates a swing arm unit of first preferred embodiment and the aspect of a valve unit；
Fig. 5 is a top view, aids in illustrating Fig. 3 aspect；
Fig. 6 is a sectional view, illustrates the installation aspect of a rocker arm shaft of the swing arm unit of first preferred embodiment；
Fig. 7 is a sectional view, illustrates the aspect of a camshaft of first preferred embodiment；
Fig. 8 is a sectional view, illustrates the aspect of another rocking arm of the swing arm unit of first preferred embodiment；
Fig. 9 is a sectional view, illustrates aspect of two reinforced ribs higher than the axle center of the camshaft of first preferred embodiment；
And
Figure 10 is a schematic diagram, illustrates that the present invention is easy to substitute one second preferred embodiment of the internal combustion engine of rocker arm shaft
Swing arm unit aspect.
Embodiment
About addressing other technologies content, feature and effect before the present invention, following cooperation two of refer to the attached drawing compared with
In the detailed description of good embodiment, can clearly it present.
Before the present invention is described in detail, it is noted that, in the following description content, similar element is with phase
With numbering represent.
It is the first preferred embodiment of the internal combustion engine that the present invention is easy to substitute rocker arm shaft refering to Fig. 3 and Fig. 4, comprising
The swing arm unit 4 that the driver element 3, one that one cylinder unit 2, one is arranged in the cylinder unit 2 is driven by the driver element 3,
And the valve unit 5 being correspondingly arranged with the swing arm unit 4.
The cylinder unit 2 includes the cylinder head 22 that a cylinder 21, one is arranged on the cylinder 21, and one and the cylinder head 22
With reference to cylinder-head cover 25, the cylinder 21 and cylinder head 22 be formed with a combustion chamber 26, and the cylinder head 22 has an exterior wall portion
223rd, an air inlet air flue 221 of the combustion chamber 26, and an exhaust air flue 222 are connected.
Refering to Fig. 5 and Fig. 7, the driver element 3 stretches through into the camshaft 31 of the swing arm unit 4 including one, the camshaft 31
With a driving section 311 for being arranged on ora terminalis, coordinate shown in Fig. 4, the axle center of the camshaft 31 is less than the cylinder head 22 and vapour
The faying face of cylinder head cover 25.The camshaft 31 of this implementation is the form of overhead, and the driving section 311 is bent with a chain 32 and one
Axle (not shown) is mutually interlocked, but the kind of drive is not limited or such as gear, belt with chain 32, in addition the camshaft
31 can also be the form that bottom is put, and drive the start of swing arm unit 4 using multiple push rod (not shown).
Refering to Fig. 4,5,6, the swing arm unit 4 includes one and integrally prolonged from the direction of the cylinder head 22 to the opposite cylinder 21
The rocker arm shaft 41, two stretched and be fed through the support base 23 by the circular support base 23, two in the exterior wall portion 223 is hubbed on this etc. respectively
The Rocker arm 42 of rocker arm shaft 41, and two pilot pins for being installed on the support base 23 and being positioned at the ora terminalis of grade rocker arm shaft 41 respectively
43。
Special instruction, the Rocker arm 42 of the swing arm unit 4 is the intake and exhaust stroke for controlling internal combustion engine,
It is skill well known to those skilled in the art that this, which is controlled with start principle, not described here any more, and the rocker arm shaft of the swing arm unit 4
41st, Rocker arm 42 is generally in symmetrical, but the quantity of above-mentioned each element is not limited with aspect shown in the drawings.
Refering to Fig. 3 and Fig. 5, the support base 23 have one adjacent to the driving section 311 of the camshaft 31 the first wall portion 231,
One along the length direction of camshaft 31 and the second wall portion 232 of the first wall portion 231 separately, and two along the camshaft 31 length
Degree direction extends and connected the reinforced ribs 233 in the first wall portion 231 and the exterior wall portion 223 of cylinder head 22, more coordinates shown in Fig. 6,
The first wall portion 231 has two perforation 234, and the second wall portion 232 has two perforation 234 respectively with the first wall portion 231
Corresponding perforation 235, the perforation 234 in the first wall portion 231, the perforation 235 in the second wall portion 232 are engaged to form two two ends
Passage 236 that is open and being worn respectively for the grade rocker arm shaft 41.And as shown in figure 9, the highest of the reinforced ribs 231 of the support base 23
Point is above the axle center of the camshaft 31.
Refering to Fig. 4,5, in the present embodiment, the Rocker arm 42 that the swing arm unit 4 is used for air inlet (left side in Fig. 4) is directly pressed
The valve unit 5, and there is a principal arm portion 421 for being hubbed on the rocker arm shaft 41, and one is hubbed on the rocker arm shaft 41 and lift
Different from the auxiliary portion 422 in the principal arm portion 421.According to the rotating speed of the camshaft 31, only have the principal arm portion 421 to carry out in low speed
Air inlet is pressed, and the auxiliary portion 422 is concatenated with principal arm portion 421 using controlling organization (not shown) in high speed, allows the pair
Arm 422 can make the start of principal arm portion 421 in the lump and change the lift that principal arm portion 421 is pressed when being driven by the camshaft 31,
The Rocker arm 42 for belonging to variable lift, and the start principle of controlling organization and variable lift be those skilled in the art can be easy
Solution, seldom draws and repeats herein.
And the Rocker arm 42 that the swing arm unit 4 is used to be vented (right side in Fig. 4) is pressed through a nut 71 and a bolt 72
The valve unit 5 is moved but it is also possible to be as shown in figure 8, and identical with the Rocker arm 42 of air inlet (left side in Fig. 8) is directly to press this
The aspect of valve unit 5.
Refering to Fig. 3,4, the valve unit 5 include it is multiple stretch through into the cylinder head 22 valve rod 51, multiple be sheathed on respectively
Resetting-mechanism 52 on the valve rod 51, and multiple liners 523 contacted respectively with the grade resetting-mechanism 52 and the grade valve rod 51.
It should be noted that the valve rod 51, resetting-mechanism 52, and the quantity of liner 523 are not also limited with illustrating, and valve rod 51, reset
Mechanism 52, the quantity of liner 523 are to be engaged adjustment with the aspect of the Rocker arm 42 of the swing arm unit 4.
Each valve rod 51 has a valve face end 511 for being used to open and close air flue (air inlet air flue 221 or exhaust air flue 222), and
One is extended by the valve face end 511 and is arranged in the valve foot 512 of the cylinder head 22.Each resetting-mechanism 52 has one to be fixedly arranged on this
The retainer 521, one of valve foot 512 is set in the valve foot 512 and two ends act against the retainer 521 and cylinder head 22 respectively
Elastic component 522, the grade liner 523 is to be respectively contained in the retainer 521 and contacted with the valve foot 512, and confession this shake
The Rocker arm 42 of arm unit 4 is pushed.
Refering to Fig. 4,5,6, therefore the present embodiment, in assembling, the grade rocker arm shaft 41 of swing arm unit 4 insert respectively and propped up
The passage 236 of seat 23 is supportted, and is worn respectively simultaneously into the grade Rocker arm 42, it is to be hubbed on the grade rocker arm shaft respectively to make the grade Rocker arm 42
On 41, and the grade rocker arm shaft 41 is fixed respectively using the grade pilot pin 43, prevent the grade rocker arm shaft 41 from relative cylinder first 22
Turn or slip, and make the grade Rocker arm 42 respectively correspond to valve unit 5 valve rod 51 set, finally again by the cylinder head 22 lock set
On cylinder 21.
And when the driving section 311 of the camshaft 31 is driven by the bent axle (not shown), makes the camshaft 31 rotation, this is convex
Wheel shaft 31 can promote the grade Rocker arm 42, and the grade Rocker arm 42 is extruded corresponding valve rod 51 respectively, and the valve unit 5 is answered
Position mechanism 52 causes valve rod 51 to reset, and corresponding air inlet air flue 221, exhaust air flue 222 is turned on and off to reach, to carry out
Air inlet, the function of exhaust.
And because the liner 523 under the pressing of long-time high speed, being placed on the resetting-mechanism 52 can wear and tear so that shake
Gap between arm 42 and corresponding valve rod 51 is differed, and causes air inlet or exhaust to have some setbacks, and now needs to change the grade liner
523, and because the two ends of the passage 236 of the support base 23 are all open, therefore after the grade pilot pin 43 is removed, the grade rocking arm
Axle 41 is that the passage 236 of the support base 23 can be pulled out by the direction of the driving section 311 of the opposite camshaft 31, without by
It is limited to be blocked by the driving section 311 and can not takes out, allow the grade Rocker arm 42 to be detached the support base 23, makes the grade liner
523 is exposed and can be replaced, so the camshaft 31 need not be dismounted, so the present embodiment can shake in order to substitute this etc.
Arm axle 41.
Further, since the passage 236 of the support base 23 is both ends open, it is particularly variable when assembling the grade Rocker arm 42
The Rocker arm 42 of lift, first false can organize an interim axle (not shown), and principal arm portion 421, auxiliary portion 422 is first temporarily fixed, actual
Rocker arm 42 is assembled on support base 23, interim axle can be released by the other end when the rocker arm shaft 41 inserts passage 236, can
To simplify the formality in assembling.
In addition, in the present embodiment, the support base 23 and cylinder head 22 are to be integrally formed, and connected using the grade reinforced ribs 233
The the first wall portion 231 and the exterior wall portion 223 of cylinder head 22 of the support base 23 are met, and the peak of the grade reinforced ribs 233 is above
The axle center of the camshaft 31, it is possible to decrease the power rocked, can more strengthen the intensity in the first wall portion 231, lift the cylinder unit 2
Rigidity, and the axle center of the camshaft 31 is less than the faying face of the cylinder head 22 and cylinder-head cover 25, makes the of the support base 23
One wall portion 231 is not required to extend too high with the second wall portion 232, can also element is more closely configured, lifting rigidity and stability.
So the passage 236 of the present embodiment both ends open on support base 23 allows corresponding rocker arm shaft 41 can be from any
Side is inserted or pulled out, and can simplify the upper formality of assembling, and can be not required to when changing the grade rocker arm shaft 41 or liner 523 to remove it
His element.
Be the second preferred embodiment of the internal combustion engine that the present invention is easy to substitute rocker arm shaft refering to Figure 10, with first compared with
Good embodiment is roughly the same, and different places are, the Rocker arm 42 of the swing arm unit 4 is the Rocker arm 42 of not valve type, left with Figure 10
Exemplified by the Rocker arm 42 of side, the Rocker arm 42 has one to be hubbed on the rocker arm shaft 41 and pushes the principal arm of a wherein valve rod 51 (see Fig. 4)
Portion 421, and one be hubbed on the rocker arm shaft 41 and the auxiliary portion 422 adjacent with the principal arm portion 421, the swing arm unit 4 also includes two
Individual switching device 44 respectively between corresponding principal arm portion 421 and auxiliary portion 422.In the time of the slow-speed of revolution, the camshaft 31
Only promote the principal arm portion 421 to press a wherein valve rod 51 (see Fig. 4), so now there was only a valve rod 51 meeting start, and turn in height
When fast, principal arm portion 421 can be concatenated with auxiliary portion 422 through the switching device 44, make the auxiliary portion 422 and the principal arm portion 421
It is same to move and push another valve rod 51, and have two starts of valve rod 51, allow the tolerance of air inlet to increase.
So the present embodiment meets the air inflow under different rotating speeds using the Rocker arm 42 of not valve type, and the grade rocker arm shaft 41 is same
Sample can have the advantages that to be easy to substitute, repair.
In summary, the present invention is easy to substitute the internal combustion engine of rocker arm shaft to form both ends open on the support base 23
Passage 236, the grade rocker arm shaft 41 can be inserted from either side, can temporarily organize interim axle and simplify the upper formality of assembling, and will be more
When changing the grade Rocker arm 42 or liner 523, it can be not required to remove other elements, easily the grade rocker arm shaft 41 is extracted out, changed, therefore
Really the purpose of the present invention can be reached.
Described above, only the preferred embodiments of the invention, it is impossible to the scope of implementation of the invention is limited with this is that is, all
It is the simple equivalent changes and modifications made according to claims of the present invention and description, all still belongs to of the invention special
In the range of profit covers.
Reference numerals list
2 cylinder units
21 cylinders
22 cylinder heads
221 air inlet air flues
222 exhaust air flues
223 exterior wall portions
23 support bases
231 first wall portions
232 second wall portions
233 reinforced ribs
234 perforation
235 perforation
236 passages
25 cylinder-head covers
26 combustion chambers
3 driver elements
31 camshafts
311 driving sections
32 chains
4 swing arm units
41 rocker arm shafts
42 rocking arms
421 principal arm portions
422 auxiliary portions
43 pilot pins
44 switching devices
5 valve units
51 valve rods
511 valve face ends
512 valve foots
52 resetting-mechanisms
521 retainers
522 elastic components
523 liners
71 nuts
72 bolts.
Claims (9)
1. a kind of internal combustion engine for being easy to substitute rocker arm shaft, comprising：
One cylinder unit, including a cylinder, and one be arranged on cylinder head on the cylinder, the cylinder is formed with a combustion with cylinder head
Room is burnt, the cylinder head has an air flue for connecting the combustion chamber；It is characterized in that；
One swing arm unit, including one from the cylinder head to the direction of the opposite cylinder, integrally the support base of extension, one are fed through this
Support base and the rocker arm shaft being positioned on the support base, and a rocking arm for being hubbed on the rocker arm shaft, the support base have two that
This relative perforation, grade perforation is engaged the passage to form a both ends open and be worn for the rocker arm shaft；And
One valve unit, including one stretch through the valve rod of the cylinder head, one be sheathed on resetting-mechanism on the valve rod, and one with should
The liner of resetting-mechanism and the valve stem contacts, the valve rod has one to be used to opening and closing the valve face end of the air flue, and one by the valve face end
Extend and be arranged in the valve foot of the cylinder head, the resetting-mechanism has a retainer for being fixedly arranged on the valve foot, and one is arranged
Act against the elastic component of the retainer and cylinder head respectively at the valve foot and two ends, the liner is to be contained in the retainer simultaneously
Contact, and pushed for the rocking arm of the swing arm unit with the valve foot.
2. it is easy to substitute the internal combustion engine of rocker arm shaft as claimed in claim 1, also comprising a driver element, wherein, the drive
Moving cell includes a camshaft for stretching through into the support base and driving the rocking arm, and the camshaft has one to be arranged on ora terminalis and at this
Driving section on the outside of support base, the support base has one adjacent to the first wall portion of the driving section of the camshaft, and one along the cam
Shaft length direction and the second wall portion of the first wall portion separately, grade perforation is to be respectively formed at the first wall portion, second wall
Portion.
3. it is easy to substitute the internal combustion engine of rocker arm shaft as claimed in claim 2, wherein, the cylinder head is also surrounded with one should
The exterior wall portion of support base, the support base also has at least one reinforced ribs for connecting the first wall portion and the exterior wall portion of cylinder head.
4. it is easy to substitute the internal combustion engine of rocker arm shaft as claimed in claim 2, wherein, the cylinder head is also surrounded with one should
The exterior wall portion of support base, the support base also have at least one along the camshaft length direction extend and connect the first wall portion with
The reinforced ribs in the exterior wall portion of cylinder head.
5. it is easy to substitute the internal combustion engine of rocker arm shaft as claimed in claim 4, wherein, the highest of the reinforced ribs of the support base
Point is above the axle center of the camshaft.
6. it is easy to substitute the internal combustion engine of rocker arm shaft as claimed in claim 2, wherein, the cylinder unit is also covered comprising one
The cylinder-head cover combined on the support base and with the cylinder head, the axle center of the camshaft is less than the cylinder head and cylinder-head cover
Faying face.
7. being easy to as any one of claim 2 to 6 substitutes the internal combustion engine of rocker arm shaft, wherein, the valve unit
Including two valve rods, and two are sheathed on resetting-mechanism on the grade valve rod respectively, and the rocking arm of the swing arm unit has one to be hubbed on this
Rocker arm shaft and the principal arm portion for pushing a wherein valve rod, and one be hubbed on the rocker arm shaft and the auxiliary portion adjacent with the principal arm portion, should
Controllably moved together with the principal arm portion and push another valve rod in auxiliary portion.
8. being easy to as any one of claim 2 to 6 substitutes the internal combustion engine of rocker arm shaft, wherein, the swing arm unit
Rocking arm there is a principal arm portion for being hubbed on the rocker arm shaft, and one is hubbed on the rocker arm shaft and for changing raising for the principal arm portion
The auxiliary portion of journey.
9. it is easy to substitute the internal combustion engine of rocker arm shaft as claimed in claim 1, wherein, it is fixed that the valve unit also includes one
On the support base and it is positioned at the pilot pin of the rocker arm shaft ora terminalis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310002836.0A CN103912329B (en) | 2013-01-05 | 2013-01-05 | It is easy to substitute the internal combustion engine of rocker arm shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310002836.0A CN103912329B (en) | 2013-01-05 | 2013-01-05 | It is easy to substitute the internal combustion engine of rocker arm shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103912329A CN103912329A (en) | 2014-07-09 |
| CN103912329B true CN103912329B (en) | 2017-10-10 |
Family
ID=51038292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310002836.0A Active CN103912329B (en) | 2013-01-05 | 2013-01-05 | It is easy to substitute the internal combustion engine of rocker arm shaft |
Country Status (1)
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| CN (1) | CN103912329B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401682B (en) * | 2015-07-31 | 2019-11-08 | 光阳工业股份有限公司 | Rocker arm auxiliary unit for engine cylinder head |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6705264B2 (en) * | 1998-12-24 | 2004-03-16 | Yamaha Marine Kabushiki Kaisha | Valve control for outboard motor engine |
| CN1267624C (en) * | 2001-03-30 | 2006-08-02 | 本田技研工业株式会社 | Decompressor for 4-stroke cycle IC engine |
| CN1948738B (en) * | 2005-10-10 | 2010-07-14 | 光阳工业股份有限公司 | Cylinder head having integral supporting seat |
| CN2846759Y (en) * | 2005-10-26 | 2006-12-13 | 光阳工业股份有限公司 | Independent camshaft support base for cylinder head |
| CN201269121Y (en) * | 2008-10-16 | 2009-07-08 | 三阳工业股份有限公司 | Switching structure of variable valve lift mechanism |
| TWI460346B (en) * | 2011-06-27 | 2014-11-11 | Kwang Yang Motor Co | Engine variable valve door construction |
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2013
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| Publication number | Publication date |
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| CN103912329A (en) | 2014-07-09 |
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