CN2782958Y - Junk head for double cylinder lower set engine - Google Patents
Junk head for double cylinder lower set engine Download PDFInfo
- Publication number
- CN2782958Y CN2782958Y CN 200520007737 CN200520007737U CN2782958Y CN 2782958 Y CN2782958 Y CN 2782958Y CN 200520007737 CN200520007737 CN 200520007737 CN 200520007737 U CN200520007737 U CN 200520007737U CN 2782958 Y CN2782958 Y CN 2782958Y
- Authority
- CN
- China
- Prior art keywords
- cylinder head
- secondary air
- supply passage
- air supply
- mounting hole
- 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 double cylinder underneath type engine cylinder head, which is provided with a secondary air supply passage. An air exhaust valve mounting hole and an air exhaust passage are respectively arranged on two parallel left and left bodies. The secondary air supply passage is arranged on the top surface of the cylinder head arranged on the air exhaust valve mounting hole side 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 twin-tub underlying (not having the camshaft mounting hole on the cylinder head) the motorcycle engine 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 pipe 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 pipe 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 engine cylinder header structure, on cylinder head, offer the secondary air compensating air channel that is used for the secondary air compensating pipe 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 twin-tub underneath type engine cylinder head, offers complexity, the problem of processing difficulties with secondary air compensating air channel on the cylinder head in the solution prior art.
Twin-tub underneath type engine cylinder head described in the utility model is respectively equipped with exhaust valve mounting hole and air outlet flue on its two left and right body arranged side by side, offer the secondary air compensating air channel at the cylinder head end face of exhaust valve mounting hole side and communicate with described air outlet flue.
Described secondary air compensating air channel is a tapped hole at an end of cylinder head end face, 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 twin-tub underneath type engine cylinder head is simple, 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 twin-tub underneath type engine cylinder head described in the utility model;
Fig. 2 is that the B of Fig. 1 is to view;
Fig. 3 is that the A of Fig. 1 is to view.
Embodiment
Referring to accompanying drawing 1-Fig. 3, twin-tub underneath type engine cylinder head of the present utility model, on its two left and right body 1,2 arranged side by side, be respectively equipped with exhaust valve mounting hole 8,3 and air outlet flue 6,5, offer secondary air compensating air channel 7,4 at the cylinder head end face of exhaust valve mounting hole 8,3 sides and communicate with described air outlet flue 6,5.Described secondary air compensating air channel 7,4 is a tapped hole at an end of cylinder head end face, and an end of secondary air compensating air duct is realized and being connected of cylinder head by screw thread.
Claims (2)
1, a kind of twin-tub underneath type engine cylinder head, on its two left and right body (1,2) arranged side by side, be respectively equipped with exhaust valve mounting hole (8,3) and air outlet flue (6,5), it is characterized in that: offer secondary air compensating air channel (7,4) at the cylinder head end face of exhaust valve mounting hole (8,3) side and communicate with described air outlet flue (6,5).
2, twin-tub underlying motorcycle engine cylinder head according to claim 1, it is characterized in that: described secondary air compensating air channel (7,4) is a tapped hole at an end of cylinder head end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520007737 CN2782958Y (en) | 2005-03-18 | 2005-03-18 | Junk head for double cylinder lower set engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520007737 CN2782958Y (en) | 2005-03-18 | 2005-03-18 | Junk head for double cylinder lower set engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2782958Y true CN2782958Y (en) | 2006-05-24 |
Family
ID=36767944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520007737 Expired - Fee Related CN2782958Y (en) | 2005-03-18 | 2005-03-18 | Junk head for double cylinder lower set engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2782958Y (en) |
-
2005
- 2005-03-18 CN CN 200520007737 patent/CN2782958Y/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 | ||
| ASS | Succession or assignment of patent right |
Owner name: CHONGQING ZONGSHEN ENGINE MANUFACTURING CO. Free format text: FORMER OWNER: CHONGQING ZONGSHEN TECHNOLOGY DEVELOPMENT + RESEARCH CO., LTD. Effective date: 20071221 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20071221 Address after: Shen Shen industrial park, Banan District, Chongqing, China: 400054 Patentee after: Chongqing Zongshen Engine Manufacturing Co., Ltd. Address before: No. 25 Erlang Road, Chongqing hi tech Development Zone, Shiqiaopu, 400039 Patentee before: Chongqing Zongshen Technology Development & Research Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060524 |