CN2787855Y - Split type water-cooled cylinder head with double exhaust ducts for single-cylinder overhead engine - Google Patents
Split type water-cooled cylinder head with double exhaust ducts for single-cylinder overhead engine Download PDFInfo
- Publication number
- CN2787855Y CN2787855Y CN 200520033632 CN200520033632U CN2787855Y CN 2787855 Y CN2787855 Y CN 2787855Y CN 200520033632 CN200520033632 CN 200520033632 CN 200520033632 U CN200520033632 U CN 200520033632U CN 2787855 Y CN2787855 Y CN 2787855Y
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- Prior art keywords
- secondary air
- cylinder head
- double
- split type
- air
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- Expired - Fee Related
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Abstract
The utility model relates to a split type water cooling cylinder head with double exhaust ducts for a single-cylinder overhead engine which is provided with a secondary air supplying air passage. A split type cam shaft mounting hole, a cooling water duct and double air exhaust ducts are arranged on the utility model. A lug boss is arranged between the double air exhaust ducts. A secondary air supply duct is arranged on the lug boss and communicated with the air exhaust ducts. The position where the secondary air supply duct and the double air exhaust ducts are communicated with each other is positioned in a cross region of the double air exhaust ducts. The problems of the complicated arrangement and difficult processing of the secondary air supply ducts on a cylinder head in the prior art are solved. Therefore, the arrangement of the secondary air supply ducts on the cylinder head is simple, and the original water duct of the cylinder head is not changed; the length of the secondary air supply duct is shorter, the manufacture is easy, the reliability of the installation of the secondary air supply ducts is added and the installation of the secondary air supply ducts is convenient.
Description
Technical field
The utility model relates to the motorcycle engine cylinder head, particularly offers the split type double air flue engine cylinder head of single-cylinder water-cooling overhead of secondary air compensating air channel.
Background technique
CO, HC and NOx that motorcycle engine mixed gas burning back ejects from silencing apparatus are main pollutants, and be very effective with the method reduction CO and the HC of secondary air compensating, and both economical.The method of secondary air compensating is exactly to add fresh air in the air outlet flue of engine cylinder head, and high-temp waste gas burning once more in the cylinder head air outlet flue that the indoor mixed gas burning of engine combustion back is produced is with the O in the CO in the waste gas and HC and the fresh air
2Further oxidation reaction becomes harmless H in the air outlet flue of cylinder head
2O and CO
2Thereby, reach the purpose that reduces HC and CO content in the waste gas.Usual way is to connect a secondary air compensating air duct that leads to air-strainer and controlled folding by an one-way valve at the cylinder head air outlet flue, the openings of sizes of the vacuum degree control secondary air compensating air duct that this one-way valve produces when utilizing engine charge, reach the different purpose of air compensation when different operating mode, just disclose the multiple example that the method that adopts secondary air compensating on different motors reduces discharging respectively as Chinese patent 99118739,99124498,00106963,01123174,02240977,93105944,03119815,01143598 etc.But owing to be subjected to the restriction of cylinder header structure, on cylinder head, offer the secondary air compensating air channel that is used for the secondary air compensating air duct is communicated with the cylinder head air outlet flue and have certain degree of difficulty, thereby make the more complicated of offering of the secondary air compensating air channel that communicates with the cylinder head air outlet flue in the above-mentioned prior art, secondary air compensating air channel length is longer, causes the processing of secondary air compensating system, assembly cost higher.
The model utility content
The purpose of this utility model provides the split type double air flue engine cylinder head of a kind of single-cylinder water-cooling overhead, offers complexity, the problem of processing difficulties with secondary air compensating air channel on the cylinder head in the solution prior art.
The split type double air flue engine cylinder head of single-cylinder water-cooling overhead described in the utility model, which is provided with split type camshaft mounting hole, cooling water channel and double air flue, between described double air flue, be provided with boss, offer the secondary air compensating air channel on the boss and communicate with double air flue, secondary air compensating air channel and double the air flue place of passing through mutually are positioned at the intersecting area of double air flue.
Described secondary air compensating air channel is a tapped hole at an end of boss, and the secondary air compensating air duct is realized and being connected of cylinder head by screw thread.
The utility model has the advantages that: offering of the secondary air compensating air channel on the split type double air flue engine cylinder head of single-cylinder water-cooling overhead is simple, do not change the original water channel of cylinder head yet, secondary air compensating air channel length is shorter, make its easy processing, and increased the reliability that the secondary air compensating air duct is installed, made things convenient for the installation of secondary air compensating air duct.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the schematic top plan view of the split type double air flue engine cylinder head of a kind of single-cylinder water-cooling overhead described in the utility model;
Fig. 2 is that the A of Fig. 1 is to view.
Embodiment
Referring to accompanying drawing 1, Fig. 2, the split type double air flue engine cylinder head of single-cylinder water-cooling overhead of the present utility model, which is provided with split type camshaft mounting hole, cooling water channel 5 and double air flue 1,3, and at described double air flue 1, be provided with boss 4 between 3, offer secondary air compensating air channel 2 and double air flue 1 on the boss 4,3 communicate, secondary air compensating air channel 2 and double air flue 1,3 mutually the place of passing through be positioned at double air flue 1,3 intersecting area, secondary air compensating air channel 2 is processed into tapped hole at an end of boss 4, and the secondary air compensating air duct can be realized and being connected of cylinder head by this tapped hole.
Claims (2)
1, the split type double air flue engine cylinder head of a kind of single-cylinder water-cooling overhead, which is provided with split type camshaft mounting hole, cooling water channel (5) and double air flue (1,3), it is characterized in that: between described double air flue (1,3), be provided with boss (4), offer secondary air compensating air channel (2) on the boss (4) and communicate with double air flue (1,3), secondary air compensating air channel (2) and double air flue (1,3) place of passing through mutually are positioned at the intersecting area of double air flue (1,3).
2, the split type double air flue engine cylinder head of single-cylinder water-cooling overhead according to claim 1, it is characterized in that: described secondary air compensating air channel (2) is a tapped hole at an end of boss (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520033632 CN2787855Y (en) | 2005-03-22 | 2005-03-22 | Split type water-cooled cylinder head with double exhaust ducts for single-cylinder overhead engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520033632 CN2787855Y (en) | 2005-03-22 | 2005-03-22 | Split type water-cooled cylinder head with double exhaust ducts for single-cylinder overhead engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2787855Y true CN2787855Y (en) | 2006-06-14 |
Family
ID=36786150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520033632 Expired - Fee Related CN2787855Y (en) | 2005-03-22 | 2005-03-22 | Split type water-cooled cylinder head with double exhaust ducts for single-cylinder overhead engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2787855Y (en) |
-
2005
- 2005-03-22 CN CN 200520033632 patent/CN2787855Y/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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060614 |