CN2711393Y - Unloading groove for cylinder cap of four-valve diesel engine - Google Patents
Unloading groove for cylinder cap of four-valve diesel engine Download PDFInfo
- Publication number
- CN2711393Y CN2711393Y CN 200420096050 CN200420096050U CN2711393Y CN 2711393 Y CN2711393 Y CN 2711393Y CN 200420096050 CN200420096050 CN 200420096050 CN 200420096050 U CN200420096050 U CN 200420096050U CN 2711393 Y CN2711393 Y CN 2711393Y
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- cylinder
- compensating groove
- cylinder head
- diesel engine
- valve
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Abstract
The utility model discloses an unloading groove for integral cylinder cap of multi-cylinder four-valve diesel engine. An unloading groove is provided between every two cylinders on the cylinder cap baseboard. The total number of the unloading groove is n-1(n represents the number of the cylinder on a piece of integral cylinder cap). The stresses of other positions can be concentrated and eliminated in the position of the unloading groove through reasonable arrangement of the length, width and depth of the unloading groove. Thus, the load excess concentration in the cylinder cap region on top of the cylinder hole can be eliminated. The problem of the nose bridge part cracking of the inlet valve of the cylinder cap can be solved.
Description
Technical field
The utility model relates to the integrated cylinder cover of four-valve diesel engine, especially at the compensating groove of four valve multi-cylinder diesel engine cylinder head of valve bridge of the nose district cracking problem.
Background technique
At present, the every cylinder of domestic most diesel oil machine all adopts two air valve structures, and the type of four air valve structures seldom.According to general design now, the intake valve bridge of the nose district of four air valve structure cylinder head all is a weak part, mostly exists the fault of cracking.When cracking fracture extension during to the cylinder cap water channel, the appearance of association fault such as the interior water inlet of cylinder will cause directly that cylinder sleeve gets rusty, scuffing of cylinder bore, piston burn out.At present part diesel engine enterprise attempts improving the hardness of cylinder head material or oil sprayer periphery and adds measure such as copper sheathing accelerated heat transmission and all can't solve bridge of the nose district this difficult problem that ftractures completely.
Summary of the invention
Integrated cylinder cover intake valve bridge of the nose district cracking causes the damage of correlated parts after bridge of the nose district leaks, cause motor to stop, and causes tremendous loss for the diesel engine user.In order to overcome above fault, a kind of model utility design proposal now is provided, promptly process the way of compensating groove on the original basis, the load part that bear in intake valve bridge of the nose district is transferred to the compensating groove position, alleviate the working pressure in cylinder head intake valve bridge of the nose district, reached the purpose of eliminating crackle.
Technical solution of the present utility model is such: comprise the compensating groove between four valve multi-cylinder diesel engine cylinder head, the every cylinder, the stiffening rib of compensating groove correspondence.Compensating groove is between intake duct side cylinder bolt hole and air outlet flue side cylinder bolt hole distance, at deep trouth of the location arrangements that hits exactly between per two cylinders on the cylinder head bottom surface, length arrives the bolt hole of both sides, and the degree of depth surpasses the cylinder cap floor, arrives in the stiffening rib of casting.The degree of depth of compensating groove is subject to the thickness of stiffening rib, the thickness of stiffening rib limits according to the intensity of casting mold joint with the sewerage loam core, manufacture with reference to its intensity and stiffening rib, the compensating groove of multi-cylinder Four-valve diesel engine cylinder head of, the feature of compensating groove and function are to eliminate the distortional stress of overall cylinder cover, avoid cylinder cap bottom weak part crackle to occur.The compensating groove number is n-1 (n represents the cylinder number of an integral cylinder head), and with respect to the vertical or oblique layout of cylinder head bottom center line, its position is between two cylinders.The purpose that adopts this layout finally is will be with stress concentration point from the position transfer of cylinder head between two cylinders, to improve the reliability of cylinder head working area work.The minimum width that the width of compensating groove can arrive from machining tool subtracts distance the difference that cylinder diameter obtains to cylinder core distance.The length of compensating groove also has the leeway that extends to cylinder cap side direction end face from the distance between two cylinder bolts to the cylinder cap bi-side.The stiffening rib thickness that the degree of depth of compensating groove can be ensured the quality of products according to casting technique is determined.The geometrical shape of compensating groove is that cylinder type, square, straight trough type, skewed slot type also can be wherein a kind of of ladder-type.Compensating groove is keeping under the condition of its function, and directly casting reinforcing rib or processing are worn water channel and used chemical bulking agent sealing water channel or add that aluminium is stifled to be separated water channel or all can realize causing remedying the sealing problem of water channel because slot with various ways such as O RunddichtringO sealing water channels.As long as can reach the purpose of elimination, relieve stresses, the position of compensating groove can not be distributed in the position between two cylinders, and by improving reliable technological design, compensating groove is distributed in the cylinder.
The beneficial effects of the utility model are, expand with heat and contract with cold and be subjected to the restriction of cylinder bolt in the integral cylinder head intermediate portion, stress is easy to concentrate on inner certain weak part of cylinder head, produce bigger distortion, after distortion surpassed certain value, crackle must appear in weak part, according to the structure of four-valve cylinder head, intake valve bridge of the nose district is the weakest, and this position also is that the cracking number of times is maximum in test.The present invention allows stress concentrate to compensating groove, avoids the key job position in the cylinder crackle to occur.This design part simulates a cylinder one lid, stopped because of the cylinder cap bulk deformation restricted, conquassation bridge of the nose district, scrap the fault of entire cylinder head, and this new technique only need be on the basis of original design, casting reinforcing rib and processing compensating groove in water channel, and the processing of compensating groove is simple, technology is uncomplicated, do not need mould is carried out big change, implement rapidly and efficiently good manufacturability.
Description of drawings
Fig. 1 is a compensating groove bottom view of the present utility model.
Fig. 2 is the longitudinal section of compensating groove of the present utility model according to A-A among Fig. 1.
Fig. 3 is the cross-sectional figure of compensating groove of the present utility model according to B-B among Fig. 1.
Among Fig. 1～Fig. 3: compensating groove (1), cylinder head bolt hole (2), cylinder head valve port (3), _ intake valve bridge of the nose district (4), cylinder head water channel hole (5), cylinder head stiffening rib (6), compensating groove (7), cylinder head base plate (8), the terminal circular arc R (9) of compensating groove, compensating groove maximum depth H (10), cylinder head water hole (11), cylinder head base plate (12), cylinder head goes up water hole (13) greatly, little water hole (14), the cylinder head floor (15) between two cylinders, the valve guide hole (16) gone up of cylinder head, oil injector hole (17), cylinder head floor (18), stiffening rib (19), compensating groove (20), cylinder lid (21), gas has just covered side (22), suction tude bolt hole (23), top surface of cylinder cover spill port (24), intake duct side cylinder bolt hole (25), cylinder cap top casting plane (26), air outlet flue side cylinder bolt hole (27), exhaust side water channel (28).
Embodiment
Best embodiment of the present utility model is such, compensating groove is between intake duct side cylinder bolt hole and air outlet flue side cylinder bolt hole distance, at first select integrated type four valve cylinder head, casting reinforcing rib (6) in the back side water channel (5) on the cylinder head floor (15) between two cylinders then, the operative position of casting position and compensating groove (20) requires to have one-to-one relationship.In the processing of compensating groove (20), require to use thin blade to cut, the degree of depth of groove (10) intensity, stiffening rib thickness with reference to the water channel loam core below the casting mold joint manufactures, the average thickness that requires to surpass cylinder cap floor (8) arrives in the stiffening rib of casting out (6), and compensating groove (20) length requirement reaches the distance between two cylinder bolt holes (25), (27).The bottom of compensating groove (20) requires processing straight, limit by processing technology, reserves the R circular arc (9) corresponding with machining tool at compensating groove (20) two ends.Require to process between per two cylinders a compensating groove (20).The compensating groove of four-valve diesel engine integrated cylinder cover of the present utility model (7), cylinder head base plate (15) is gone up between per two cylinders and is arranged compensating groove (7), and compensating groove adds up to n-1 (n represents a cylinder number on the integral cylinder head).Compensating groove is cylinder type, square, straight trough type, skewed slot type, ladder grooved or other shapes, by reasonable Arrangement compensating groove length, width and the degree of depth, reaches stress transfer and the purpose of eliminating in the compensating groove position with other positions.Thereby reach the situation that solves cylinder cap intake valve bridge of the nose district cracking, eliminates the load concentrations in cylinder cap zone, top, cylinder hole.
Claims (3)
1. Four-valve diesel engine cylinder head of compensating groove, comprise cylinder lid, cylinder head base plate, cylinder head stiffening rib, compensating groove, cylinder head valve port, cylinder head water channel hole, cylinder head bolt hole, intake valve bridge of the nose district, it is characterized in that compensating groove (7) is between intake duct side cylinder bolt hole (25) and air outlet flue side cylinder bolt hole (27) distance, the position correspondence of the compensating groove (7) in stiffening rib (6) and the stiffening rib, it is arranged with respect to cylinder head bottom center line and arranges.
2. according to the described Four-valve diesel engine cylinder head of compensating groove of claim 1, it is characterized in that its compensating groove number be n-1 wherein n represent the cylinder number of an integral cylinder head, compensating groove (7) width deducts cylinder diameter less than bore pitch, the length of compensating groove (7) extends to cylinder cap two side direction end faces (22) from the position between two cylinder bolt holes (25), (27) to bi-side, and the degree of depth of compensating groove (7) is below the casting mold joint.
3. according to the described Four-valve diesel engine cylinder head of compensating groove of claim 1, it is characterized in that compensating groove (7) is wherein a kind of of cylinder type, square, straight trough type, skewed slot type, ladder-type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420096050 CN2711393Y (en) | 2004-09-29 | 2004-09-29 | Unloading groove for cylinder cap of four-valve diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420096050 CN2711393Y (en) | 2004-09-29 | 2004-09-29 | Unloading groove for cylinder cap of four-valve diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2711393Y true CN2711393Y (en) | 2005-07-20 |
Family
ID=36192496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420096050 Expired - Lifetime CN2711393Y (en) | 2004-09-29 | 2004-09-29 | Unloading groove for cylinder cap of four-valve diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2711393Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104131908A (en) * | 2014-08-12 | 2014-11-05 | 广西玉柴机器股份有限公司 | Cylinder cover machining stress concentration elimination structure |
| CN105275657A (en) * | 2015-11-03 | 2016-01-27 | 东风商用车有限公司 | Integral cylinder cover of diesel engine with parallel air valves |
| CN108361421A (en) * | 2017-01-26 | 2018-08-03 | 日东工器株式会社 | Check-valves |
| CN108397306A (en) * | 2018-03-06 | 2018-08-14 | 广西玉柴机器股份有限公司 | For reducing the structure of cylinder block main bearing seat oil leab rectangular ports stress |
| CN110131066A (en) * | 2019-06-25 | 2019-08-16 | 一汽解放汽车有限公司 | Cylinder head Floor water side dumping carries slot structure |
| CN110566360A (en) * | 2019-09-18 | 2019-12-13 | 广西玉柴机器股份有限公司 | Cylinder head with enhanced rigidity |
| CN114183271A (en) * | 2021-10-29 | 2022-03-15 | 东风商用车有限公司 | Cylinder head with unloading groove structure |
| CN117634265A (en) * | 2024-01-25 | 2024-03-01 | 潍柴动力股份有限公司 | Cylinder cover unloading groove parameter determination method and related device |
-
2004
- 2004-09-29 CN CN 200420096050 patent/CN2711393Y/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104131908A (en) * | 2014-08-12 | 2014-11-05 | 广西玉柴机器股份有限公司 | Cylinder cover machining stress concentration elimination structure |
| CN105275657A (en) * | 2015-11-03 | 2016-01-27 | 东风商用车有限公司 | Integral cylinder cover of diesel engine with parallel air valves |
| CN105275657B (en) * | 2015-11-03 | 2018-03-23 | 东风商用车有限公司 | Integral cylinder cover of diesel engine with parallel air valves |
| CN108361421A (en) * | 2017-01-26 | 2018-08-03 | 日东工器株式会社 | Check-valves |
| CN108361421B (en) * | 2017-01-26 | 2020-01-10 | 日东工器株式会社 | Check valve |
| CN108397306A (en) * | 2018-03-06 | 2018-08-14 | 广西玉柴机器股份有限公司 | For reducing the structure of cylinder block main bearing seat oil leab rectangular ports stress |
| CN110131066A (en) * | 2019-06-25 | 2019-08-16 | 一汽解放汽车有限公司 | Cylinder head Floor water side dumping carries slot structure |
| CN110131066B (en) * | 2019-06-25 | 2024-04-19 | 一汽解放汽车有限公司 | Water side unloading groove structure of bottom plate of cylinder cover |
| CN110566360A (en) * | 2019-09-18 | 2019-12-13 | 广西玉柴机器股份有限公司 | Cylinder head with enhanced rigidity |
| CN114183271A (en) * | 2021-10-29 | 2022-03-15 | 东风商用车有限公司 | Cylinder head with unloading groove structure |
| CN117634265A (en) * | 2024-01-25 | 2024-03-01 | 潍柴动力股份有限公司 | Cylinder cover unloading groove parameter determination method and related device |
| CN117634265B (en) * | 2024-01-25 | 2024-05-17 | 潍柴动力股份有限公司 | Cylinder cover unloading groove parameter determination method and related device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140929 Granted publication date: 20050720 |