CN2787850Y - Integrated water-cooled cylinder head for single-cylinder lower arranged motorcycle engine - Google Patents
Integrated water-cooled cylinder head for single-cylinder lower arranged motorcycle engine Download PDFInfo
- Publication number
- CN2787850Y CN2787850Y CN 200520033619 CN200520033619U CN2787850Y CN 2787850 Y CN2787850 Y CN 2787850Y CN 200520033619 CN200520033619 CN 200520033619 CN 200520033619 U CN200520033619 U CN 200520033619U CN 2787850 Y CN2787850 Y CN 2787850Y
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- CN
- China
- Prior art keywords
- cylinder head
- secondary air
- air
- air supply
- outlet flue
- Prior art date
- 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 single-cylinder underneath type water-cooled engine cylinder head of a motorcycle, which is provided with a secondary air supply passage. A cooling water passage and an air exhaust passage are arranged on the utility model. The outlet end of the air exhaust passage is projected out of the side surface of the cylinder head. The secondary air supply passage is arranged on the outlet end of the air exhaust passage and communicated with the air exhaust passage. 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 length of the secondary air supply passage is short, 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 single cylinder underneath type (no camshaft mounting hole on the cylinder head) the cooling engine for motor cycle water cylinder head 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 for the cooling engine for motor cycle water cylinder head, owing to be subjected to the restriction of its 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 a kind of single cylinder underneath type cooling engine for motor cycle water cylinder head, offers complexity, the problem of processing difficulties with secondary air compensating air channel on the cylinder head in the solution prior art.
Single cylinder underneath type cooling engine for motor cycle water cylinder head described in the utility model, which is provided with cooling water channel and air outlet flue, the outlet end of this air outlet flue protrudes in the cylinder head side, offers the secondary air compensating air channel and communicate with air outlet flue on the outlet end of described air outlet flue.
The outlet end of air outlet flue is provided with boss, and described secondary air compensating air channel is opened on this boss, with the manufacturability of raising secondary air compensating air channel processing and the reliability of secondary air compensating air duct connection.
Described secondary air compensating air channel is a tapped hole at an end of boss, and an end of 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 single cylinder underneath type cooling engine for motor cycle water cylinder head is simple, secondary air compensating air channel length is shorter, make its easy processing, do not destroy the cooling water channel in the cylinder head, 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 that the master of single cylinder underneath type cooling engine for motor cycle water cylinder head described in the utility model looks schematic representation;
Fig. 2 is the plan view of Fig. 1.
Embodiment
Referring to accompanying drawing 1-Fig. 2, this single cylinder underneath type cooling engine for motor cycle water cylinder head, which is provided with cooling water channel 1 and air outlet flue 4, the outlet end 5 of this air outlet flue 4 protrudes in cylinder head side 6, be provided with boss 3 at described air outlet flue 4 outlet end 5 end faces, on this boss 3, offer secondary air compensating air channel 2 and communicate with air outlet flue 4.Secondary air compensating air channel 2 is processed into tapped hole at an end of boss 3, and an end that can make the secondary air compensating air duct is realized and being connected of cylinder head by screw thread.
The boss 3 that offers secondary air compensating air channel 2 also can be arranged on the both sides or the bottom surface of air outlet flue 4 outlet end 5, and its concrete structure size according to cylinder head is decided.
Claims (3)
1, a kind of single cylinder underneath type cooling engine for motor cycle water cylinder head, which is provided with cooling water channel (1) and air outlet flue (4), the outlet end of this air outlet flue (5) protrudes in cylinder head side (6), it is characterized in that: offer secondary air compensating air channel (2) and communicate with air outlet flue (4) on the outlet end (5) of described air outlet flue.
2, single cylinder underneath type cooling engine for motor cycle water cylinder head according to claim 1, it is characterized in that: the outlet end of air outlet flue (5) is provided with boss (3), and described secondary air compensating air channel (2) is opened on this boss (3).
3, single cylinder underneath type cooling engine for motor cycle water cylinder head according to claim 2, it is characterized in that: described secondary air compensating air channel (2) is a tapped hole at an end of boss (3).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 200520033619 CN2787850Y (en) | 2005-03-22 | 2005-03-22 | Integrated water-cooled cylinder head for single-cylinder lower arranged motorcycle engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 200520033619 CN2787850Y (en) | 2005-03-22 | 2005-03-22 | Integrated water-cooled cylinder head for single-cylinder lower arranged motorcycle engine |
Publications (1)
Publication Number | Publication Date |
---|---|
CN2787850Y true CN2787850Y (en) | 2006-06-14 |
Family
ID=36786145
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 200520033619 Expired - Fee Related CN2787850Y (en) | 2005-03-22 | 2005-03-22 | Integrated water-cooled cylinder head for single-cylinder lower arranged motorcycle engine |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN2787850Y (en) |
-
2005
- 2005-03-22 CN CN 200520033619 patent/CN2787850Y/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 |