CN2623882Y - Gasoline engine decompression mechanism - Google Patents
Gasoline engine decompression mechanism Download PDFInfo
- Publication number
- CN2623882Y CN2623882Y CN 03217459 CN03217459U CN2623882Y CN 2623882 Y CN2623882 Y CN 2623882Y CN 03217459 CN03217459 CN 03217459 CN 03217459 U CN03217459 U CN 03217459U CN 2623882 Y CN2623882 Y CN 2623882Y
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- CN
- China
- Prior art keywords
- decompressing
- relief valve
- valve body
- pressure
- valve plunger
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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 decompressor for gasoline engine and mainly resolves a technical problem that operation of the prior hand driven mechanism of decompressor needs manual control so as to be not convenient to use. One technical proposal of this utility model to resolve the technical problem is that a decompressing groove is arranged on the top of the cylinder wall and the decompressing groove connects with an exhaust hole. The other technical proposal is that a valve hole is arranged on the head of the cylinder and a decompressing valve body as well as a copulate decompressing valve plunger piston is arranged inside the valve hole. Position-limit mechanism of the decompressing valve plunger piston is arranged on the decompressing valve body, and a decompressing hole is connected with the gap between the decompressing valve plunger piston and the decompressing valve body. The utility model is of simple structure, easy operation and the decompressing processing is stable and reliable, the effect of alleviating the starting load is remarkable and thus the gasoline engine is easy to start.
Description
Technical field: the utility model relates to the technology of gasoline engine field, particularly relates to the petrol engine mechanism of decompressor.
Background technique: the mechanism of decompressor on the at present common small-sized universal engine is the manual mechanism of decompressor, before piloting engine, opens Joystick, and then opens reduction valve, after the normal operation, closes reduction valve rapidly.The use of this mechanism will be controlled with manpower, operation inconvenience.
Summary of the invention: the technical problems to be solved in the utility model is that the operation of the existing manual mechanism of decompressor needs manpower control, uses inconvenience.
First technological scheme of the utility model technical solution problem is, comprise cylinder block, cylinder head has valve opening, establish relief valve body in the valve opening, pressure-relief valve plunger and relief valve body endoporus cooperate, and relief valve body and pressure-relief valve plunger are provided with position-limit mechanism, pressure-relief valve plunger can be limited to certain position by position-limit mechanism, have vent on the relief valve body, vent communicates with gap between pressure-relief valve plunger and the relief valve body endoporus.
The structure of position-limit mechanism, relief valve body is provided with the spacing hole perpendicular to its axis, be provided with spring, spacing ball in the spacing hole, spacing ball contacts with spring, but dead spring reaches return under the spring force effect, and pressure-relief valve plunger is provided with corresponding restraining groove, spacing ball snaps in restraining groove under spring pressure, realize the location of pressure-relief valve plunger.
During starting, earlier pressure-relief valve plunger is pressed, spring and spacing ball just are fixed on certain position to pressure-relief valve plunger, and gap, the firing chamber of vent, pressure-relief valve plunger and relief valve body endoporus communicate at this moment, play decompression.When piston carried out compression stroke, part compressed mixed gas was discharged through vent from the gap between relief valve body and the pressure-relief valve plunger, has so just reduced starting pressure, made petrol engine be easy to starting.After the starting, pressure-relief valve plunger is under the gas pressure effect, automatically get back to prestarting position, and promote the spacing ball return and block pressure-relief valve plunger by spring, be maintained in its closed position, because the sealing between pressure-relief valve plunger and relief valve body, the mixed gas in the cylinder can not be discharged by vent, the pressure when guaranteeing the petrol engine proper functioning.The utility model is simple in structure, and is easy to operate, and the decompression working stability is reliable, and it is remarkable to alleviate the starting load effect, and petrol engine is started easily.
Another technological scheme of the utility model technical solution problem is, comprises cylinder block, and on the cylinder body wall, the top of relief opening has decompressing groove, and decompressing groove and relief opening communicate.
During starting, when piston by lower dead center when top dead center moves, close relief opening gradually.When piston goes upward to the minimum point of decompressing groove again, exhaust close, mixed gas begins to compress, and during compression, partially mixed gas is discharged along decompressing groove, and the pressure in the cylinder body reduces, and starting resistance reduces, and starts laborsaving.
Description of drawings:
Fig. 1 is embodiment one a structural representation;
Fig. 2 is the sectional drawing of A-A face among Fig. 1;
Fig. 3 is embodiment two a structural representation.
Embodiment:
Embodiment one, with reference to Fig. 1,2, the head of cylinder block 10 has valve opening 11, establish relief valve body 4 in the valve opening 11, the endoporus of pressure-relief valve plunger 3 and relief valve body 4 cooperates, be provided with gap 1 between relief valve body 4 and the pressure-relief valve plunger 3 at the middle part, gap 1 communicates with vent 2 on the relief valve body 4; Three groups of position-limit mechanisms are along relief valve body 4 circumference uniform distributions, relief valve body 4 is provided with the spacing hole 12 perpendicular to its axis, be provided with spring 6, spacing ball 5 in the spacing hole 12, spacing ball 5 is a steel ball, and spacing ball 5 contacts with spring 6, pressure-relief valve plunger 3 is provided with corresponding restraining groove, restraining groove comprises circular groove 8 and wedge slot 9, when spacing ball snaps in circular groove 8 under spring pressure, is in open mode, when spacing ball 5 snaps in wedge slot 9 under spring pressure, be in closed condition.
Embodiment two, with reference to Fig. 3, and the 10th, cylinder block, the 7th, relief opening is provided with vertical decompressing groove 13 on the top of relief opening 7, and decompressing groove 13 communicates with relief opening 7.
Claims (3)
1, a kind of petrol engine mechanism of decompressor, comprise cylinder block (10), it is characterized in that cylinder block (10) head has valve opening (11), establish relief valve body (4) in the valve opening (11), pressure-relief valve plunger (3) and relief valve body (4) endoporus cooperate, relief valve body (4) and pressure-relief valve plunger (3) are provided with position-limit mechanism, have vent (2) on the relief valve body (4), and vent (2) communicates with gap (1) between pressure-relief valve plunger and the relief valve body endoporus.
2, the petrol engine mechanism of decompressor according to claim 1, it is characterized in that said position-limit mechanism, relief valve body (4) is provided with the spacing hole (12) perpendicular to its axis, be provided with spring (6), spacing ball (5) in the spacing hole (12), spacing ball (5) contacts with spring, and pressure-relief valve plunger (3) is provided with and the corresponding restraining groove of spacing ball (5).
3, a kind of petrol engine mechanism of decompressor comprises cylinder block (10), it is characterized in that the top of relief opening (7) has decompressing groove (13) on cylinder block (10) wall, and decompressing groove (13) and relief opening (7) communicate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03217459 CN2623882Y (en) | 2003-05-23 | 2003-05-23 | Gasoline engine decompression mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03217459 CN2623882Y (en) | 2003-05-23 | 2003-05-23 | Gasoline engine decompression mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2623882Y true CN2623882Y (en) | 2004-07-07 |
Family
ID=34243531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03217459 Expired - Fee Related CN2623882Y (en) | 2003-05-23 | 2003-05-23 | Gasoline engine decompression mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2623882Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937065A (en) * | 2012-11-30 | 2013-02-20 | 江和彬 | Inhaul cable starting type automatic pressure reduction starting device for two-stroke engine |
-
2003
- 2003-05-23 CN CN 03217459 patent/CN2623882Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937065A (en) * | 2012-11-30 | 2013-02-20 | 江和彬 | Inhaul cable starting type automatic pressure reduction starting device for two-stroke engine |
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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 |