CN1216230C - Air vent for carburetor - Google Patents
Air vent for carburetor Download PDFInfo
- Publication number
- CN1216230C CN1216230C CN 02102706 CN02102706A CN1216230C CN 1216230 C CN1216230 C CN 1216230C CN 02102706 CN02102706 CN 02102706 CN 02102706 A CN02102706 A CN 02102706A CN 1216230 C CN1216230 C CN 1216230C
- Authority
- CN
- China
- Prior art keywords
- carburetor
- ventilating hole
- liquid level
- opening end
- main body
- 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 - Lifetime
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- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Control Of The Air-Fuel Ratio Of Carburetors (AREA)
Abstract
The invention provides an air vent apparatus in a carburetor. An open end (A) in an atmospheric air side of an air vent passage (A) communicating a liquid surface upper chamber (6A) with an atmospheric air is open in the downward direction substantially orthogonal to a fuel liquid surface X-X, and a wind prevention wall (9) for shutting a traveling wind applied to the atmospheric air side open end (A1) is provided in a front side in the vehicle forward moving direction of the atmospheric air side open end (A1). The apparatus can prevent a negative pressure generated by a traveling wind from being applied to a liquid surface upper chamber in a float chamber when a vehicle travels, and can execute a stable fuel control.
Description
Technical field
The present invention relates to adjust, control the amount of mixed gas of IC engine supply and the Carburetor of concentration, relate to the ventilating hole path that chamber and atmosphere are communicated with on the liquid level of the fixed fuel liquid level that forms in the float chamber of Carburetor.
Background technique
In real the 1st example that discloses the ventilating hole device of existing Carburetor in clear 57-171163 number of opening.According to this device, the atmosphere opening end of the ventilating hole path that chamber and atmosphere are communicated with on the liquid level of the fixed fuel liquid level that will form in float chamber towards with the lower direction opening of fixed fuel liquid level quadrature.
And, the 2nd example of the ventilating hole device of existing Carburetor is disclosed in real fair 1-8683 number.The document discloses the atmosphere opening end of ventilating hole path towards the substantially horizontal opening along the fixed fuel liquid level, and use is opened downwards, cross section is the technology that the shielding portion that is close to the U font covers the top and the both sides of described atmosphere opening end.
Ventilating hole device according to the Carburetor of existing the 1st example, the atmosphere opening end downward direction opening of ventilating hole path, so in the time of on Carburetor being installed on vehicle (for example motorcycle), water and foreign matter are difficult to invade in the ventilating hole path, reach desirable ventilating hole effect, but undesirable when vehicle driving.
That is to say that if vehicle driving, therefore the wind that travels produce negative pressure at opening end by the atmosphere opening end, this negative pressure is by chamber on the liquid level of ventilating hole path arrival float chamber.Like this, the chamber is in negative pressure state on the liquid level, make to act on and change at the pressure reduction between the chamber on negative pressure on the fuel jet orifices such as the main fuel spray nozzle of air intake passage upper shed or low speed spray orifice and the liquid level, make from the fuel of described fuel jet orifice sucking-off inhomogeneous, worry can cause that runnability worsens or exhausting air in the harmful matter that contains increase.
And, according to the 2nd prior art, because of the atmosphere opening end of ventilating hole path towards the substantially horizontal opening, so, can not suppress entering of water effectively even center on shielding portion.
And described shielding portion is to form on the cooling-air baffle as the other parts of carburetor main body, so need the other parts of special design or utilize other parts.
Summary of the invention
In view of above-mentioned unsatisfactory situation, the object of the present invention is to provide a kind of water, foreign matter etc. of can not making to enter, and the influence of the wind that when vehicle driving, do not travelled, more do not increase part count, number is installed, and with the ventilating hole device of the Carburetor implemented at a low price.
In order to achieve the above object, the 1st of the ventilating hole device of Carburetor of the present invention the be characterised in that:
Below the air intake passage that float chamber is formed at the perforation carburetor main body, to be formed at by the ventilating hole path that the chamber is communicated with atmosphere on the liquid level of the fixed fuel liquid level in the float chamber, the atmosphere opening end of described ventilating hole path is towards being close in the ventilating hole device of Carburetor of lower direction opening of quadrature with fixed fuel liquid level X-X, the windproof wall of configuration on the opening portion of an end of the vehicle direct of travel front side of described atmosphere opening end, this windproof wall and being integral of Carburetor, and blocking acts on the wind that travels of atmosphere opening end.
And the of the present invention the 2nd is characterised in that: on the basis of above-mentioned the 1st feature, with above-mentioned windproof wall and Carburetor is integrally formed, as the fitting seat that other parts are installed.
According to the 1st feature, with the wind blocking of travelling that produces in the vehicle driving,, can make maintenance stable atmospheric pressure state in chamber on the liquid level in the float chamber by windproof wall so can not cause negative pressure at the atmosphere opening end of ventilating hole path, therefore, can carry out correct fuel supply by fuel nozzle.
And, according to the 2nd feature of the present invention, be formed with the fitting seat of windproof wall in carburetor main body one side, and do not need to be provided with in addition new wall portion by utilizing.
As mentioned above, ventilating hole device according to Carburetor of the present invention, the atmosphere opening end that makes the ventilating hole path is towards being close to the downward direction opening of quadrature with the fixed fuel liquid level, at end opening portion place's configuration plane of the vehicle direct of travel front side of atmosphere opening end windproof wall to its direct of travel, so when vehicle is advanced, can make that the chamber always keeps stable atmospheric pressure state on the liquid level in the float chamber, therefore, can stably supply with correct fuel to internal-combustion engine.
Therefore, water, foreign material etc. can not enter in the float chamber by the ventilating hole path, the runnability excellence can be provided, can reduce the ventilating hole device of the Carburetor of harmful matter contained in the exhausting air.And, above-mentioned windproof wall and carburetor main body are formed as one, neither increase component number, number is installed, do not improve manufacture cost yet.Particularly easily conventional device is implemented.And above-mentioned windproof wall can improve the degrees of freedom of windproof wall design by using the fitting seat of other parts that form as one with carburetor main body, and its enforcement is easier.
Description of drawings
Fig. 1 is an embodiment's the major component longitdinal cross-section diagram (being equivalent among Fig. 2 the sectional view along the P-P line) of the ventilating hole device of expression Carburetor of the present invention.
Fig. 2 is the right hand view of Fig. 1.
Fig. 3 is other embodiment's the profile of the ventilating hole device of expression Carburetor of the present invention.
Symbol description: 1 carburetor main body; 9 windproof walls; A ventilating hole path; A1 atmosphere opening end.
Embodiment
Below, with reference to an embodiment of the ventilating hole device of description of drawings Carburetor of the present invention.
Fig. 1 is the longitudinal section of Carburetor.Fig. 2 is a profile.
The 1st, air intake passage 2 connects its inner carburetor main body, carries out open and close controlling by the 4 pairs of air intake passages of throttle valve 2 that are installed on the throttle spindle 3.
Configuration float chamber main body 5 below carburetor main body 1 forms float chamber 6 by the below recess and the float chamber main body 5 of carburetor main body 1.
In float chamber 6, by by float 7, flow into valve seat that the road connects together with not shown fuel, fixedly leveling device that the float-controlled valve that opens and closes valve seat constitutes forms fixing level of fuel X-X.
And the top position of the fixing level of fuel X-X in float chamber 6 forms chamber 6A on the liquid level, so chamber 6A is communicated with atmosphere by ventilating hole path A on this liquid level.
The ventilating hole path A of present embodiment extends on the left top of chamber 6A from the liquid level upward, then is bent into substantially horizontal to the right, and its atmosphere opening end A1 is towards being close to the downward direction B opening of quadrature with fixed fuel liquid level X-X.
In addition, the 8th, stop up the stopper of the substantially horizontal opening of the ventilating hole path A of extension in the horizontal direction.
And at the atmosphere opening end A1 place of ventilating hole path A, following windproof wall 9 is set to one with carburetor main body.
At first, be installed at Carburetor under the state on the internal-combustion engine of not shown vehicles such as motorcycle, in Fig. 2, if the direct of travel Y of supposition vehicle is direction left, just the left at atmosphere opening end A1 forms as one windproof wall 9 and carburetor main body 1.
This windproof wall 9 is to erect continuously in the face of the opening A2 of direct of travel one side of atmosphere opening end A1 to be provided with.In other words, at the opening A2 place configuration plane of direct of travel one side of atmosphere opening end A windproof wall 9 to its direct of travel.
At this, if internal combustion engine operation and vehicle enter travelling state, in Fig. 2, the wind that travels flows from left to right, so upper section at ventilating hole path A, produce the air-flow U of the wind that travels along ventilating hole path A (being ventilating hole path seat specifically), part produces the air-flow D of the wind that travels below ventilating hole path A.
At this, if be conceived to the air-flow D of the wind that travels of below part, in a single day the wind that travels knock windproof wall 9, just changes direction and flow along the direction away from the atmosphere opening end A1 of ventilating hole path A.
According to the above, by the air-flow D of the wind that travels, can significantly reduce the influence of the atmosphere opening end A1 wind that travels nearby of ventilating hole path A, can suppress the generation of atmosphere opening end A1 negative pressure nearby greatly.
Therefore, the negative pressure that produces because of the wind that travels can not act on the liquid level on the 6A of chamber by atmosphere opening end A1, ventilating hole path A, can make that chamber 6A always remains on stable atmospheric pressure state on the liquid level, thus, always can stably keep the pressure reduction between the 6A of chamber on fuel jet orifices such as main nozzle, low speed spray orifice and the liquid level, with fuel sucking-off correctly to air intake passage 2.
And described windproof wall can form as one with carburetor main body by for example casting, does not therefore need special parts, do not increase component number, number etc. is installed, compared with the existing, do not improve manufacture cost yet, can easily implement conventional device.
And, as shown in Figure 3, can on Carburetor, dispose jaw opening sensor 20, this jaw opening sensor 20 detects the aperture signal of throttle valve 4 in the electric signal mode, and described aperture signal exported to the outside, the fitting seat 11 that will be used to install this jaw opening sensor 20 is set to one with carburetor main body 1, so this fitting seat 11 can be used as above-mentioned windproof wall 9.
New windproof wall in addition need not be set in view of the above, and fitting seat 11 can play the effect of windproof wall 9.
In addition, except being used to install the fitting seat of described jaw opening sensor, the path seat of starting arrangement etc. is set integratedly on carburetor main body also, also can utilizes these seats.
And the atmosphere opening end A1 of ventilating hole path A is towards better with the lower direction opening of the intimate quadrature of fixed fuel liquid level X-X.
Claims (2)
1. the ventilating hole device of a Carburetor, it forms float chamber below the air intake passage that connects carburetor main body, to be formed at by the ventilating hole path that the chamber is communicated with atmosphere on the liquid level of the fixed fuel liquid level in the float chamber, the atmosphere opening end (A1) of described ventilating hole path (A) is towards being close to the lower direction opening of quadrature with fixed fuel liquid level X-X, it is characterized in that, configuration windproof wall (9) in opening (A2) portion of an end of the vehicle direct of travel front side of described atmosphere opening end, this windproof wall (9) is integral with carburetor main body (1), and blocking acts on the wind that travels of atmosphere opening end (A1).
2. the ventilating hole device of Carburetor as claimed in claim 1 is characterized in that, described windproof wall and carburetor main body (1) is formed as one, as the fitting seat (11) that other parts are installed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001018638A JP2002221096A (en) | 2001-01-26 | 2001-01-26 | Air vent device of caburetor |
| JP2001018638 | 2001-01-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1367312A CN1367312A (en) | 2002-09-04 |
| CN1216230C true CN1216230C (en) | 2005-08-24 |
Family
ID=18884629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02102706 Expired - Lifetime CN1216230C (en) | 2001-01-26 | 2002-01-23 | Air vent for carburetor |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP2002221096A (en) |
| CN (1) | CN1216230C (en) |
| HK (1) | HK1049199B (en) |
| MY (1) | MY138601A (en) |
| TW (1) | TW550339B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954041B (en) * | 2012-11-20 | 2015-09-02 | 石狮市通达电机有限公司 | Centrifugal blower and comprise the air conditioner of this kind of centrifugal blower |
| CN108590891B (en) * | 2018-05-14 | 2023-11-17 | 重庆宗申通用动力机械有限公司 | Carburetor for general purpose engine |
| CN108488008A (en) * | 2018-05-14 | 2018-09-04 | 重庆宗申通用动力机械有限公司 | A kind of logical machine carburetor |
| CN108488009A (en) * | 2018-05-14 | 2018-09-04 | 重庆宗申通用动力机械有限公司 | It is a kind of to be used to lead to the carburetor on machine |
-
2001
- 2001-01-26 JP JP2001018638A patent/JP2002221096A/en active Pending
-
2002
- 2002-01-23 CN CN 02102706 patent/CN1216230C/en not_active Expired - Lifetime
- 2002-01-25 MY MYPI20020290 patent/MY138601A/en unknown
- 2002-01-25 TW TW91101305A patent/TW550339B/en not_active IP Right Cessation
-
2003
- 2003-02-27 HK HK03101445.6A patent/HK1049199B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| JP2002221096A (en) | 2002-08-09 |
| CN1367312A (en) | 2002-09-04 |
| HK1049199B (en) | 2005-11-11 |
| HK1049199A1 (en) | 2003-05-02 |
| TW550339B (en) | 2003-09-01 |
| MY138601A (en) | 2009-07-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20050824 |
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| CX01 | Expiry of patent term |