CN2573701Y - Low-exhaust multicylinder diesel engine cylinder head - Google Patents
Low-exhaust multicylinder diesel engine cylinder head Download PDFInfo
- Publication number
- CN2573701Y CN2573701Y CN 02279224 CN02279224U CN2573701Y CN 2573701 Y CN2573701 Y CN 2573701Y CN 02279224 CN02279224 CN 02279224 CN 02279224 U CN02279224 U CN 02279224U CN 2573701 Y CN2573701 Y CN 2573701Y
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- cylinder
- oil nozzle
- cylinder head
- diesel engine
- utility
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- Expired - Fee Related
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Abstract
The utility model relates to a low-exhaust multicylinder diesel engine cylinder head, which belongs to the technical field of an internal-combustion engine. The utility model is mainly composed of a cylinder head, a gas valve, a gas valve seat ring, a gas valve guide pipe, an oil nozzle bushing, etc. By reasonably ranging the deflected distance between the center of a gas intake and a gas exhaust valves and the center of a cylinder, and changing the installation position and the slope angle of an oil nozzle sheathed on the cylinder head, and the offset distance between an outlet at the bottom plane of the cylinder head of the oil nozzle and the center of the cylinder, the best match of the oil injection rule of the oil nozzle and the shape of a piston combustion chamber is achieved. Thus, the utility model has the advantages that the pollutant discharge value of a natural aspirated diesel engine achieves European discharge standard I, the pollutant discharge value of a pressurizing inter-cooling diesel engine achieves European discharge standard II, and the utility model can cause the diesel engine to save energy more than 10 percents.
Description
(1) technical field:
The utility model belongs to field of internal combustion engine, relates to a kind of multi-cylinder diesel engine cylinder head of low emission.
(2) background technique:
The combustion system of the multi-cylinder diesel engine of China's production at present adopts direct injection combustion system more and more, and the design of cylinder head is one of key technology wherein.The combustion performance and the cylinder cap of direct injection combustion system is enterprising, exhaust valve position, oil nozzle position and oil nozzle have very strong relevance with respect to the angle of inclination equidimension of cylinder cap bottom plane, and particularly the spatial position of oil nozzle shaft axis on cylinder cap is especially crucial.Because the oil nozzle shaft axis of existing diesel and the angle of cylinder cap bottom plane are generally about 73-75 °, and the projection line of oil nozzle edge cover shaft axis on cylinder head is general and cylinder head vertical coordinate line coincides, the oily line that is unfavorable for oil nozzle obtains optimal placement in piston combustion bowl, so that the combustion performance of existing diesel is subjected to certain influence, can't satisfy the national environmental protection rules of increasingly stringent.
(3) summary of the invention:
The purpose of this utility model is to provide a kind of low emission multi-cylinder diesel engine cylinder head rational in infrastructure.
The technical solution of the utility model is: by experiment and the calculating to diesel engine air inlet system air inlet rule, having now under the constant situation of cylinder cap boundary dimension of the same type, limiting adjacent two bore spacings of cylinder cap is 127 ± 0.5mm, and the total thickness of cylinder cap is 100 ± 1mm.Every cylinder is equipped with each one at inlet and outlet door on cylinder cap, and make the intake valve center be respectively 13 ± 0.5mm and 24 ± 0.5mm with respect to the vertical and horizontal equivalent of cylinder axis, the exhaust valve center is respectively 13 ± 0.5mm and 28.5 ± 0.5mm with respect to the vertical and horizontal equivalent of cylinder axis.Every cylinder is installed the oil nozzle that is used for fixing oil nozzle and is inlayed each one in cover on the cylinder cap, this oil nozzle edge cover shaft axis on cylinder head projection line and the angle of cylinder head vertical coordinate line be 15 ± 2 °, oil nozzle edge cover shaft axis is 83 ± 2 ° with the angle of cylinder cap bottom plane, and this intersection point with respect to its cylinder axis vertically and horizontal equivalent be respectively 6.762 ± 0.5mm and 1.81 ± 0.5mm.
The utility model can reach following beneficial effect: because by reasonably arranging, the distance of exhaust valve misalignment cylinder axis, change the oil nozzle edge and be enclosed within mounting inclination angle degree on the cylinder cap and oil nozzle at the outlet of cylinder cap bottom plane offset distance apart from cylinder axis, reached the optimum Match of oil nozzle fuel injection characteristic and piston combustion chamber shape, realized the abundant mixing of fuel oil and air, can make the naturally aspirated Diesel value of discharging pollutants reach European I emission standard, the turbocharged and intercooled diesel engine value of discharging pollutants reaches European II emission standard, simultaneously can make diesel engine energy-conservation more than 10%, have good society and economic benefit.
(4) description of drawings:
Fig. 1 is the utility model structure cut-away view;
Fig. 2 is the utility model intake valve, exhaust valve, the relative cylinder axis position view of oil nozzle mounting hole;
Fig. 3 is the α angle schematic representation of the utility model oil nozzle edge cover shaft axis and cylinder head vertical coordinate line;
Fig. 4 is the β angle schematic representation of the utility model oil nozzle edge cover shaft axis and cylinder cap bottom plane, middle L-L cut-away view promptly shown in Figure 3.
(5) embodiment:
The utility model is made up of parts such as cylinder head 1, intake valve 2, exhaust valve 3, inlet valve seat ring 4, exhaust valve seat insert 5, valve guide bushing 6, oil nozzle edge covers 7, is installed in the diesel-engine body top.Valve guide bushing 6 and inlet and outlet gate seat circle 4,5 are pressed in the valve guide bushing and air valve seat ring mounting hole on the cylinder head 1, in the oil nozzle edge cover 7 oil nozzle thimble holes that are pressed on the cylinder head 1.Intake valve 2, exhaust valve 3 are respectively charged in the corresponding valve guide hole.Limiting the adjacent two bore spacing A of cylinder cap is 127 ± 0.5mm, and the total thickness H of cylinder cap is 100 ± 1mm.Every cylinder is equipped with respectively one at inlet and outlet door 2,3 on the cylinder cap, make intake valve 2 centers be respectively 13 ± 0.5mm and 24 ± 0.5mm with respect to the perpendicular distance B and the horizontal equivalent C at cylinder cap upper cylinder center, exhaust valve 3 centers are respectively 13 ± 0.5mm and 28.5 ± 0.5mm with respect to the perpendicular distance D and the horizontal equivalent E of cylinder axis, as shown in Figure 1 and Figure 2.Oil nozzle edge cover shaft axis on cylinder head projection line and the angle α of cylinder head vertical coordinate line be 15 ± 2 °, as shown in Figure 3.The angle β of oil nozzle edge cover shaft axis and cylinder cap bottom plane is 83 ± 2 °, and this intersection point is respectively 6.762 ± 0.5mm and 1.81 ± 0.5mm with respect to the perpendicular distance F and the horizontal equivalent G of its cylinder axis, shown in Fig. 2,4.
Claims (3)
1, a kind of multi-cylinder diesel engine cylinder head of low emission, form by parts such as cylinder head, intake valve, exhaust valve, inlet valve seat ring, exhaust valve seat insert, valve guide bushing, oil nozzle edge covers, be installed in the diesel-engine body top, it is characterized in that: the intake valve center is respectively 13 ± 0.5mm and 24 ± 0.5mm with respect to the vertical and horizontal equivalent of cylinder axis, and the exhaust valve center is respectively 13 ± 0.5mm and 28.5 ± 0.5mm with respect to the vertical and horizontal equivalent of cylinder axis.
2, multi-cylinder diesel engine cylinder cap according to claim 1, it is characterized in that: every cylinder is equipped with the oil nozzle that is used for fixing oil nozzle and inlays each one in cover on the cylinder cap, this oil nozzle edge cover shaft axis on cylinder head projection line and the angle of cylinder head vertical coordinate line be 15 ± 2 °, oil nozzle edge cover shaft axis is 83 ± 2 ° with the angle of cylinder cap bottom plane, and this intersection point with respect to its cylinder axis vertically and horizontal equivalent be respectively 6.762 ± 0.5mm and 1.81 ± 0.5mm.
3, multi-cylinder diesel engine cylinder cap according to claim 1 is characterized in that: limiting adjacent two bore spacings of cylinder cap is 127 ± 0.5mm, and the total thickness of cylinder cap is 100 ± 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02279224 CN2573701Y (en) | 2002-09-16 | 2002-09-16 | Low-exhaust multicylinder diesel engine cylinder head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02279224 CN2573701Y (en) | 2002-09-16 | 2002-09-16 | Low-exhaust multicylinder diesel engine cylinder head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2573701Y true CN2573701Y (en) | 2003-09-17 |
Family
ID=33742341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02279224 Expired - Fee Related CN2573701Y (en) | 2002-09-16 | 2002-09-16 | Low-exhaust multicylinder diesel engine cylinder head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2573701Y (en) |
-
2002
- 2002-09-16 CN CN 02279224 patent/CN2573701Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |