CN2777224Y - Double cylinder water cooled top-placed split type motorcycle engine cylinder head - Google Patents
Double cylinder water cooled top-placed split type motorcycle engine cylinder head Download PDFInfo
- Publication number
- CN2777224Y CN2777224Y CN 200520033627 CN200520033627U CN2777224Y CN 2777224 Y CN2777224 Y CN 2777224Y CN 200520033627 CN200520033627 CN 200520033627 CN 200520033627 U CN200520033627 U CN 200520033627U CN 2777224 Y CN2777224 Y CN 2777224Y
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- CN
- China
- Prior art keywords
- cylinder head
- secondary air
- split type
- air supply
- supply passage
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a double cylinder water cooled overhead split type cylinder head of a motorcycle engine, which is provided with a secondary air supply passage. A split type cam shaft mounting hole, an air exhaust passage, a cooling water passage and a cooling water inlet are respectively arranged on two parallel left and right bodies. The secondary air supply passage is arranged in the position adjacent to the upper part of the air exhaust passage on the top surface of the cylinder head. The problems of the complicated arrangement of the secondary air supply passage and difficult processing on a cylinder head in the prior art are solved, so that the arrangement of the secondary air supply passage on the cylinder head is simple. The original water passage of the cylinder head is not changed, and the length of the secondary air supply passage is short. Therefore, the processing is easy, the reliability of the installation of the secondary air supply passage is increased and the installation of the secondary air supply passage is convenient.
Description
Technical field
The utility model relates to the motorcycle engine cylinder head, particularly offers the split type motorcycle engine cylinder head of twin-tub water-cooled 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 motorcycle engine cylinder head of a kind of twin-tub water-cooled 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 motorcycle engine cylinder head of twin-tub water-cooled overhead described in the utility model, on its two left and right body arranged side by side, be respectively equipped with split type camshaft mounting hole and air outlet flue, and cooling water channel, cooling water intake, at the cylinder head end face, offer the secondary air compensating air channel near the top of described air outlet flue and communicate with described air outlet flue.
Described secondary air compensating air channel can be tapped hole at an end of cylinder head end face.
The utility model has the advantages that: offering of the secondary air compensating air channel on the split type motorcycle engine cylinder head of twin-tub water-cooled 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 representation of the split type motorcycle engine cylinder head of twin-tub water-cooled overhead described in the utility model;
Fig. 2 is the plan view of Fig. 1.
Embodiment
Referring to accompanying drawing 1, Fig. 2, the split type motorcycle engine cylinder head of twin-tub water-cooled overhead of the present utility model, on its two left and right body 1,2 arranged side by side, be respectively equipped with split type camshaft mounting hole and air outlet flue 3,4, and cooling water channel 5, cooling water intake 6, at the cylinder head end face, offer secondary air compensating air channel 7,8 near the top of described air outlet flue 3,4 and communicate with described air outlet flue 3,4 respectively, secondary air compensating air channel 7,8 is a tapped hole at an end of cylinder head end face.
Claims (2)
1, the split type motorcycle engine cylinder head of a kind of twin-tub water-cooled overhead, on its two left and right body (1,2) arranged side by side, be respectively equipped with split type camshaft mounting hole and air outlet flue (3,4), and cooling water channel (5), cooling water intake (6), it is characterized in that:, offer secondary air compensating air channel (7,8) near the top of described air outlet flue (3,4) and communicate with described air outlet flue (3,4) at the cylinder head end face.
2, the split type motorcycle engine cylinder head of twin-tub water-cooled overhead according to claim 1 is characterized in that: described secondary air compensating air channel (7,8) on the cylinder crown and an end be tapped hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520033627 CN2777224Y (en) | 2005-03-22 | 2005-03-22 | Double cylinder water cooled top-placed split type motorcycle engine cylinder head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520033627 CN2777224Y (en) | 2005-03-22 | 2005-03-22 | Double cylinder water cooled top-placed split type motorcycle engine cylinder head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2777224Y true CN2777224Y (en) | 2006-05-03 |
Family
ID=36744609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520033627 Expired - Fee Related CN2777224Y (en) | 2005-03-22 | 2005-03-22 | Double cylinder water cooled top-placed split type motorcycle engine cylinder head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2777224Y (en) |
-
2005
- 2005-03-22 CN CN 200520033627 patent/CN2777224Y/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: 20060503 |