CN103195602B - Cylinder head and overhead camshaft engine - Google Patents
Cylinder head and overhead camshaft engine Download PDFInfo
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- CN103195602B CN103195602B CN201310134760.7A CN201310134760A CN103195602B CN 103195602 B CN103195602 B CN 103195602B CN 201310134760 A CN201310134760 A CN 201310134760A CN 103195602 B CN103195602 B CN 103195602B
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Abstract
The invention provides a cylinder head which comprises a top face, an air inlet side face, a exhaust side face, a front end face, and a rear end face. A camshaft mounting seat and a rocker support mounting boss are distributed on the top face. A through oil return passage is arranged between the front end face and the rear end face. The cylinder head is provided with a first straight oil hole vertically downwardly extending from the rocker support mounting boss and a second straight oil hole horizontally extending from the air inlet side face. The first straight oil hole is communicated with the second straight oil hole which is communicated with the oil return passage. The invention further provides an overhead camshaft engine with the cylinder head. By the cylinder head, the engine structure is compacter to further achieve miniaturization.
Description
Technical field
The present invention relates to engine art, be specifically related to a kind ofly utilize straight oilhole for the cylinder head of valve rocker fuel feeding and the overhead camshaft engine adopting this cylinder cap.
Background technique
In the evolution of automotive industry, how to realize the miniaturization of motor, compactness is the target that designer constantly pursues always.
In Chinese Patent Application No.: in the patent of invention of 96192117.X, the applying date: 1996-10-16, denomination of invention " rocker arm assembly of internal-combustion engine ", disclose a kind of internal-combustion engine, valve rocker is installed in cylinder head by rocker arm support, and rocker arm support is installed when being fastened on cylinder cap, need on cylinder cap, cast out rocker arm support installation base.Further, in order to provide lubrication to valve rocker, rocker arm support and rocking arm support pads are provided with oil leab.And in that patent, valve rocker needs push rod to support, which has limited motor reduction in the height direction.
In Chinese Patent Application No.: in the utility model patent of 201220401277.1, the applying date: 2012-8-14, denomination of invention " overhead camshaft cylinder cap ", further disclose the oil duct of back oil road to rocker arm support installation base fuel feeding of cylinder head.Because the structure of motor is very compact, in order to dodge the structures such as the water jacket of surrounding, back oil road can only be positioned at the below of cam shaft installing seat, for consideration easy to process, rocker arm support installation base adopt inclined oil hole of air and back oil road through.But inclined oil hole of air also limit the further miniaturization of motor, there is room for improvement.
Summary of the invention
The object of the invention is to overcome above-mentioned shortcoming, a kind of cylinder head of compact structure is provided, to realize the further miniaturization of motor.
For achieving the above object, the invention provides following technological scheme:
A kind of cylinder head, described cylinder head has end face, air inlet side, exhaust side, front-end face and ear end face, described end face is distributed with cam shaft installing seat and rocker arm support installation base, between described front-end face and described ear end face, there is through back oil road, described cylinder head has the first straight oilhole of extending straight down from described rocker arm support installation base and the second straight oilhole of horizontal-extending from described air inlet side, described first straight oilhole is communicated with the described second straight oilhole, and the described second straight oilhole is communicated with described back oil road.
Preferably, the opening of the described second straight oilhole in described air inlet side is by shutoff.
Preferably, the described second straight oilhole carries out shutoff at the opening of described air inlet side by blanking cover.
A kind of overhead camshaft engine, comprising: cylinder head as above; Be arranged on the camshaft in described cam shaft installing seat; Be arranged on the rocker arm support on described rocker arm support installation base, it comprises intake rocker Support cushion and exhaust rocker arm Support cushion, described intake rocker Support cushion is connected by bridging portion with described exhaust rocker arm Support cushion, and described intake rocker Support cushion and described exhaust rocker arm Support cushion are installed with intake rocker bearing and exhaust rocker arm bearing respectively; Intake rocker, its one end has the roller by described camshaft actuated, and the other end connects a pair air intake valve, and middle rotating shaft is fixedly mounted on described intake rocker bearing; Exhaust rocker arm, its one end has the roller by described camshaft actuated, and the other end connects a pair drain tap, and middle rotating shaft is fixedly mounted on described exhaust rocker arm bearing; The rotating shaft of described intake rocker and the shaft parallel of described exhaust rocker arm offset and come.
Preferably, described rocker arm support has oil duct that oilhole straight with described first be communicated with to provide lubricating oil to described intake rocker and described exhaust rocker arm.
Preferably, the rotating shaft of described roller is manufactured by lead brass wire rod.
Preferably, the rotating shaft of described roller has oil groove.
Preferably, rocker arm support described in each has two to described intake rocker Support cushion and described exhaust rocker arm Support cushion.
The general inclined oil hole of air adopted is replaced owing to present invention employs two mutually perpendicular straight oilholes, therefore the rotating locus of the cam of camshaft can be similar to two straight oilholes tangent, relative to inclined oil hole of air be similar to tangent compared with, make on the width of camshaft between air inlet side and exhaust side closer to rocker arm support installation base, also can be lowered in the height direction simultaneously, correspondingly, the size of whole motor can be reduced, achieve the compacter layout of motor, be beneficial to and realize miniaturization.
Further, the second straight oilhole carries out shutoff by blanking cover after machining, and neither affects the performance of motor, utilizes again original shutoff operation to carry out shutoff, and not needing increases miscellaneous equipment or increase operation.
Further, the present invention adopts camshaft directly contact the roller of valve rocker thus drive inlet valve rocker and exhaust valve rocker arm, eliminate push rod, make structure simpler, highly also can be further reduced, and after the shaft parallel of intake rocker and exhaust rocker arm offsets, the width of motor can either be made little as far as possible, be conducive to again inlet and outlet timing.
Further, the oil duct on rocker arm support is communicated with the first straight oilhole, can provide lubrication for valve rocker and assembly thereof, improves service life of aeroengine.
Further, by lead brass wire rod manufacture roller rotating shaft, in the rotating shaft of roller, drive oil groove, all make between rotating shaft and roller more wear-resisting, increase the service life.
Further, a rocker arm support is arranged two pairs of intake rocker Support cushions and exhaust rocker arm Support cushion, installation precision can be improved further, ensure the air inlet between adjacent cylinder, Exsufflation synchronization.
Accompanying drawing explanation
Next will be described in further detail specific embodiments of the invention by reference to the accompanying drawings, wherein:
Fig. 1 is a kind of plan view of cylinder head of overhead camshaft engine;
Fig. 2 is the stereogram of the motor of embodiments of the invention, and the members on motor is omitted;
Fig. 3 is the sectional view of the A-A line along Fig. 1, indicates the lubricating oil passage structure of prior art;
Fig. 4 is the sectional view of the A-A line along Fig. 1 of similar Fig. 3, indicates the lubricating oil passage structure of embodiments of the invention;
Fig. 5 is that the structural principle of the lubricating oil passage structure of embodiments of the invention and the lubricating oil passage structure of prior art contrasts schematic diagram;
Fig. 6 is the stereogram of the rocker arm support of embodiments of the invention;
Fig. 7 is the explosive view of the valve rocker of embodiments of the invention;
Fig. 8 is the partial top view of Fig. 2.
Upper figure description of symbols: end face 1, air inlet side 2, exhaust side 3, front-end face 4, ear end face 5, cam shaft installing seat 6, rocker arm support installation base 7, back oil road 8, inclined oil hole of air 9, first straight oilhole 10, second straight oilhole 11, water jacket 12, camshaft 13, rocker arm support 14, intake rocker Support cushion 15, exhaust rocker arm Support cushion 16, bridging portion 17, intake rocker bearing 18, exhaust rocker arm bearing 19, intake rocker 20, exhaust rocker arm 21, roller 22, air intake valve 23, rotating shaft 24, drain tap 25, oil duct 26, rotating shaft 27, oil groove 28, bolt 29, valve adjustments bolt 30, lock nut 31, ball cup 32, air valve bridge 33.
Embodiment
Composition graphs 1 and Fig. 2, cylinder head has end face 1, is distributed with the air inlet side 2 of suction port, is distributed with the exhaust side 3 of relief opening, towards the front-end face 4 of timing wheel train and the ear end face 5 relative with front-end face 4.Those of ordinary skill in the art are to be understood that, end face 1 is that the bottom surface (unmarked) that opposite cylinder heads contacts with cylinder block (not shown) defines, and front-end face 4 and ear end face 5 are position definition of relative timing wheel train, other definition mode certainly also can be adopted.On end face 1, be distributed with cam shaft installing seat 6, and be distributed with rocker arm support installation base 7 in its vicinity.Back oil road 8 extends until ear end face 5 from front-end face 4, thus between front and rear end through whole cylinder head, as a part for cylinder lubrication oil circuit.
With reference to figure 3, because peripheral structure such as water jacket 12 grade dodged by needs, the operative position alternative of back oil road 8 is very little, generally within the oblique below of rocker arm support installation base 7 near the position of air inlet side 2.In the prior art, in order to provide lubrication to valve rocker (comprising intake rocker and exhaust rocker arm) assembly, the mode that general employing bores inclined oil hole of air 9 from rocker arm support installation base 7 is communicated to back oil road 8, so only needs once to hole, easy to process.
With reference to figure 4, with Fig. 3 unlike, the present invention gets out the first straight oilhole 10 straight down from rocker arm support installation base 7, then from air inlet side 2, level bores the second straight oilhole 11, first straight oilhole 10 is crossing with the second straight oilhole 11 to be communicated with, and in course of working, make the second straight oilhole 11 be communicated with back oil road 8, thus enable the fluid in back oil road 8 arrive rocker arm support installation base 7 via the straight oilhole 10 of the second straight oilhole 11, first, enter valve rocker further.Certainly, in order to not affect fuel feeding effect and engine performance, after processing the second straight oilhole 11, need the opening being positioned at air inlet side 2 to carry out shutoff, method for blocking can adopt the modes such as welding to carry out, but preferably adopt the mode press-fiting blanking cover to carry out shutoff, because after cylinder head machines, generally need to carry out blanking cover shutoff to water hole, oilhole, utilize existing equipment and existing operation just can complete like this, and do not need to increase welding equipment and operation more on a production line.
With reference to 5, it schematically show compared with inclined oil hole of air, adopts the advantage of straight oilhole.In Figure 5, representing the rotating locus of the cam on camshaft 13 with circle, and be all represented by dotted lines when adopting inclined oil hole of air, all representing with solid line when adopting straight oilhole.When adopting inclined oil hole of air 9, the cam rotating locus of dashed circle representative arrives the tangent position of the inclined oil hole of air 9 that represents with dotted line (certainly at the most, make dashed circle can not be real and inclined oil hole of air is tangent owing to there is the hole wall of inclined oil hole of air 9), now dashed circle arrives the width of the opening of the inclined oil hole of air 9 on rocker arm support installation base 7 is W1, and namely the air inlet side 2 of cylinder head arrives the minimum width of this opening is under W1(does not consider the prerequisite of the thickness of cam shaft installing seat 6); The height that dashed circle arrives back oil road 8 is H1.And when adopting first straight oilhole 10 and second straight oilhole 11, the center of circle C of dashed circle reaches the C position, the center of circle of solid line circle, the cam of solid line circle representative rotates to be estimated to arrive at the most and realizes the first straight oilhole 10 of representing and the tangent position of the second straight oilhole 11 is (similar with above-mentioned situation, can not be really tangent), like this, the width W 2 that the air inlet side 2 of cylinder head arrives the opening of the first straight oilhole 10 can be significantly less than W1, and the height H 2 that solid line circle arrives back oil road 8 can be significantly less than H1, that is, when other condition is constant, compared with employing inclined oil hole of air 9, when the straight oilhole 10 of employing first and the second straight oilhole 11, the height of cylinder head and width can both be reduced further.Certainly, those of ordinary skill in the art can understand, realizing circle can not the Another reason tangent with the first straight oilhole 10 be if occur tangent, then camshaft the rotating shaft being directly pressed in valve rocker will cannot drive valve rocker, but this does not hinder and adopts the reduction of cylinder head on width compared with inclined oil hole of air 9, even the center of circle C of cam rotating locus moves straight down, the reduction of cylinder width can not be brought although it is so, but still the reduction of cylinder height can be brought.That is, have employed after the first straight oilhole 10 and the second straight oilhole 11 replace inclined oil hole of air 9, cylinder head at least can realize the reduction on height, or the reduction that can simultaneously realize on height, width, thus this structure achieves the further miniaturization of motor, although the solution of the present invention needs to carry out twice boring, engine weight alleviates, arrangement space is larger huge advantage that this can bring, because of but possess cost-benefit.
With reference to figure 6, which show the concrete structure of the rocker arm support 14 that motor of the present invention adopts.Rocker arm support 14 comprises between intake rocker Support cushion 15 and exhaust rocker arm Support cushion 16, two Support cushion and being connected by bridging portion 17.Intake rocker Support cushion 15 and exhaust rocker arm Support cushion 16 are installed with intake rocker bearing 18 and exhaust rocker arm bearing 19 respectively.On the bottom surface of rocker arm support 14, have oil duct 26, oil duct 26 is communicated with the first straight oilhole 10, and the fluid therefore coming from spill port 8 can enter intake rocker 20 and exhaust rocker arm 21, provides lubrication.Oil leab about valve rocker inside is all on the books in multiple patent document and prior art document, is no longer described in detail herein.Each intake rocker Support cushion 15 and an exhaust rocker arm Support cushion 16 are a pair, think that the intake rocker 20 of same chamber and exhaust rocker arm 21 provide support.In the present invention, each rocker arm support 14 have two pairs of intake rocker Support cushions 15 and exhaust rocker arm Support cushion 16, therefore a rocker arm support can provide support for the intake rocker 20 of two adjacent firing chambers and exhaust rocker arm 21, this not only brings the convenience installed, and be conducive to the control of installation precision, ensure the intake rocker 20 of adjacent firing chamber and the timing synchronism of exhaust rocker arm 21.
Composition graphs 2, Fig. 7, which show the concrete structure of valve rocker of the present invention (comprising intake rocker 20 and exhaust rocker arm 21).One end of valve rocker has roller 22, and the rotating shaft 27 of preferred roller 22 is manufactured by lead brass wire rod, possesses better wear resistance.Meanwhile, rotating shaft 27 also has oil groove 28, the fluid coming from back oil road 8 enters oil groove 28 and thinks and provide lubrication between rotating shaft 27 and roller 22.The other end of valve rocker is provided with valve adjustments bolt 30, and end and the ball cup 32 of valve adjustments bolt 30 form bulb ball-and-socket and coordinate.Ball cup 32 presses down air valve bridge 33 along with the swing of valve rocker, thus drives a pair air intake valve 23 or a pair drain tap 25, achieves valve rocker and links with the driving of air intake valve or drain tap.The setting height(from bottom) of air intake valve 23 and drain tap 25 is subject to the adjustment of valve adjustments bolt 30 and is locked by lock nut 31 after completing adjustment.In the middle of two ends of valve rocker, rotating shaft 24 is installed.During motor assembling, camshaft 13 is installed in cam shaft installing seat 6, rocker arm support 14 is installed on rocker arm support installation base 7, bolt 29 passes rotating shaft 24 thus intake rocker 20 and exhaust rocker arm 21 is fixedly installed to respectively on intake rocker bearing 18 and exhaust rocker arm bearing 19, and intake rocker 20 and exhaust rocker arm 21 can swing around its rotating shaft 24.Thus the cam on camshaft 13 directly contacts with roller 22 and drives valve rocker.
With reference to figure 8, in order to opening time different of the opening time from drain tap 25 that adapt to air intake valve 23, the axis a of the rotating shaft of intake rocker 20 and the axis b of the rotating shaft of exhaust rocker arm 21 are that parallel offset comes and do not overlap.
Although the present invention is described in conjunction with above embodiment, but the present invention is not defined to above-described embodiment, and only by the restriction of claim, those of ordinary skill in the art can easily modify to it and change, but do not leave essential idea of the present invention and scope.
Claims (6)
1. an overhead camshaft engine, is characterized in that, comprising:
Cylinder head, described cylinder head has end face, air inlet side, exhaust side, front-end face and ear end face, described end face is distributed with cam shaft installing seat and rocker arm support installation base, between described front-end face and described ear end face, there is through back oil road, it is characterized in that, described cylinder head has the first straight oilhole of extending straight down from described rocker arm support installation base and the second straight oilhole of horizontal-extending from described air inlet side, described first straight oilhole is communicated with the described second straight oilhole, and the described second straight oilhole is communicated with described back oil road;
Be arranged on the camshaft in described cam shaft installing seat;
Be arranged on the rocker arm support on described rocker arm support installation base, it comprises intake rocker Support cushion and exhaust rocker arm Support cushion, described intake rocker Support cushion is connected by bridging portion with described exhaust rocker arm Support cushion, and described intake rocker Support cushion and described exhaust rocker arm Support cushion are installed with intake rocker bearing and exhaust rocker arm bearing respectively;
Intake rocker, its one end has the roller by described camshaft actuated, and the other end connects a pair air intake valve, and middle rotating shaft is fixedly mounted on described intake rocker bearing;
Exhaust rocker arm, its one end has the roller by described camshaft actuated, and the other end connects a pair drain tap, and middle rotating shaft is fixedly mounted on described exhaust rocker arm bearing;
The rotating shaft of described intake rocker and the shaft parallel of described exhaust rocker arm offset and come;
Rocker arm support described in each has two to described intake rocker Support cushion and described exhaust rocker arm Support cushion.
2. overhead camshaft engine according to claim 1, is characterized in that, the opening of the described second straight oilhole in described air inlet side is by shutoff.
3. overhead camshaft engine according to claim 2, is characterized in that, the described second straight oilhole carries out shutoff at the opening of described air inlet side by blanking cover.
4. overhead camshaft engine according to claim 1, is characterized in that, described rocker arm support has oil duct that oilhole straight with described first be communicated with to provide lubricating oil to described intake rocker and described exhaust rocker arm.
5. overhead camshaft engine according to claim 1, is characterized in that, the rotating shaft of described roller is manufactured by lead brass wire rod.
6. overhead camshaft engine according to claim 1, is characterized in that, the rotating shaft of described roller has oil groove.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310134760.7A CN103195602B (en) | 2013-04-18 | 2013-04-18 | Cylinder head and overhead camshaft engine |
| BR112015026313A BR112015026313A2 (en) | 2013-04-18 | 2013-09-05 | cylinder head, method of manufacture of the cylinder and engine |
| AU2013386647A AU2013386647B2 (en) | 2013-04-18 | 2013-09-05 | Cylinder head, method for manufacturing same, and engine |
| PCT/CN2013/082987 WO2014169553A1 (en) | 2013-04-18 | 2013-09-05 | Cylinder head, method for manufacturing same, and engine |
| RU2015149110A RU2629848C2 (en) | 2013-04-18 | 2013-09-05 | Head of cylinder block (versions), method of its manufacture (versions) and engine |
| CL2015003051A CL2015003051A1 (en) | 2013-04-18 | 2015-10-15 | Cylinder head, method of manufacturing and an engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310134760.7A CN103195602B (en) | 2013-04-18 | 2013-04-18 | Cylinder head and overhead camshaft engine |
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| Publication Number | Publication Date |
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| CN103195602A CN103195602A (en) | 2013-07-10 |
| CN103195602B true CN103195602B (en) | 2015-06-10 |
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| CN201310134760.7A Active CN103195602B (en) | 2013-04-18 | 2013-04-18 | Cylinder head and overhead camshaft engine |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2013386647B2 (en) * | 2013-04-18 | 2016-10-20 | Anhui Jianghuai Automobile Group Corp., Ltd. | Cylinder head, method for manufacturing same, and engine |
| CN103790666B (en) * | 2014-02-26 | 2016-01-20 | 安徽江淮汽车股份有限公司 | A kind of high-performance low-emission diesel |
| JP6932016B2 (en) | 2017-03-24 | 2021-09-08 | 本田技研工業株式会社 | Multi-cylinder engine valve gear |
| CN115405394A (en) * | 2022-08-16 | 2022-11-29 | 一汽解放汽车有限公司 | Valve drive mechanism, engine and vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5063405B2 (en) * | 2008-02-25 | 2012-10-31 | 愛知機械工業株式会社 | Cylinder head device, internal combustion engine equipped with the same, and method of manufacturing cylinder head device |
| CN201858036U (en) * | 2010-10-31 | 2011-06-08 | 无锡开普动力有限公司 | Cylinder cover lubricating structure |
| CN202391582U (en) * | 2011-10-26 | 2012-08-22 | 上汽通用五菱汽车股份有限公司 | Cylinder head structure for engine |
| CN202732015U (en) * | 2012-08-14 | 2013-02-13 | 北京长源朗弘科技有限公司 | Overhead camshaft cylinder cover |
| CN203189135U (en) * | 2013-04-18 | 2013-09-11 | 安徽江淮汽车股份有限公司 | Air cylinder cover and overhead camshaft engine |
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Inventor after: Lan Jian Inventor after: Hu Zhisheng Inventor after: Qian Duode Inventor after: Xu Tao Inventor after: Tang Derun Inventor after: Lu Ming Inventor after: Zheng Jiulin Inventor before: Ma Yufeng Inventor before: Hu Zhisheng Inventor before: Meng Xiangshan Inventor before: Xu Tao Inventor before: Tang Derun Inventor before: Lu Ming Inventor before: Zheng Jiulin |
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Free format text: CORRECT: INVENTOR; FROM: MA YUFENG HU ZHISHENG MENG XIANGSHAN XU TAO TANG DERUN LU MING ZHENG JIULIN TO: LAN JIAN HU ZHISHENG QIAN DUODE XU TAO TANG DERUN LU MING ZHENG JIULIN |
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Address after: Hefei City, Anhui Province, 230022 East Road No. 176 Patentee after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: Hefei City, Anhui Province, 230022 East Road No. 176 Patentee before: Anhui Jianghuai Automobile Co., Ltd. |
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Address after: 230601 No. 99 Ziyun Road, Hefei Economic and Technological Development Zone, Anhui Province Patentee after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: 230022 No. 176 Dongliu Road, Hefei City, Anhui Province Patentee before: Anhui Jianghuai Automobile Group Limited by Share Ltd |