CN104533675A - Fuel gas air-fuel ratio control device - Google Patents
Fuel gas air-fuel ratio control device Download PDFInfo
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- CN104533675A CN104533675A CN201410644647.8A CN201410644647A CN104533675A CN 104533675 A CN104533675 A CN 104533675A CN 201410644647 A CN201410644647 A CN 201410644647A CN 104533675 A CN104533675 A CN 104533675A
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- air
- fuel ratio
- control device
- intake duct
- ratio control
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Abstract
The invention discloses a fuel gas air-fuel ratio control device which comprises a natural gas jet nozzle, wherein the natural gas jet nozzle is placed in a radial direction in the air inlet pipe of an engine and divides the inner cavity of the air inlet pipe into two symmetric air passages; each air passage comprises a high-pressure passage area with a diminishing flow section and a negative-pressure passage area with an increasing flow section, and a throat with the smallest flow section is arranged between the high-pressure passage area and the negative-pressure passage area; a natural gas main pipe is processed in the natural gas jet nozzle; two rows of small jet holes pointing to the negative-pressure passage areas slantways are processed symmetrically in the natural gas jet nozzle; and each small jet hole is communicated with the natural gas main pipe. After flowing through the throats via the high-pressure passage areas, air in the air inlet pipe is accelerated to form pressure differences in the negative-pressure passage areas; and automatic adjustment and control of the optimum air-fuel ratio of an air and fuel gas mixture are realized according to the pressure differences and the amount of fuel gas sucked into the small jet holes.
Description
Technical field
The present invention relates to a kind of air-fuel ratio control device of air-fuel ration control technical field, particularly diesel/natural gas dual-fuel engine or natural gas engine use, specifically a kind of combustion gas air-fuel ratio control device.
Background technique
It is apply more, more advanced intake method that middle high-power diesel/natural gas double fuel engine sprays air inlet in intake manifold or cylinder head intake duct place, but traditional air-fuel ratio control device system complex, working life and reliability have considerable restraint, and be only applicable to mesohigh rock gas, inapplicable for the low pressure natural gas close to suction tude air pressure, this causes a lot of low pressure natural gas source very inconvenient in actual use, even can not effectively utilize.
Summary of the invention
Technical problem to be solved by this invention is the present situation for above-mentioned prior art, and provides that a kind of structure is simple, reliability is high, long service life, empty combustion gas mixing are effective and be applicable to the combustion gas air-fuel ratio control device that low pressure and mesohigh gas source use.
The present invention solves the problems of the technologies described above adopted technological scheme: combustion gas air-fuel ratio control device, comprise rock gas shower nozzle, rock gas shower nozzle radial direction is positioned in the air intake duct of motor, and the lumen segmentation of air intake duct is become two symmetrical air flow channels by this rock gas shower nozzle; Air flow channel comprises the gradually little high pressure flow path area of flow area and the gradually large negative pressure flow path area of flow area, and high pressure flow path area and negative pressure runner interval are formed with the minimum aditus laryngis of flow area, natural gas main is processed with in rock gas shower nozzle, and this rock gas shower nozzle is symmetrily processed with the jet apertures that two rows tilt to point to respective negative pressure flow path area, each jet apertures is all connected with natural gas main; Air in air intake duct utilizes the pressure extent formed in negative pressure flow path area when high pressure flow path area flows through and accelerates after aditus laryngis, by suck gas quantity in jet apertures number, realize the automatic regulation and control of mixed gas optimal air-fuel ratio after air and combustion gas mixing.
For optimizing technique scheme, the measure taked also comprises:
Above-mentioned air intake duct is processed with assembling radial hole, and rock gas shower nozzle is fixedly mounted in air intake duct through assembling radial hole.
The convex stage body that above-mentioned rock gas shower nozzle comprises main rod body and is connected with main rod body one; The shape of main rod body transverse section is be gradient to large semiellipse body and by the shape being gradient to greatly the asymmetric fusiformis that little sub warhead body is combined to form by little, main rod body extend in air intake duct, and convex stage body is located with the outer wall of air intake duct and matched.
The center of circle of the semiellipse body of arbitrary transverse section is all dropped on the central axis of natural gas main, and the exterior edge face of convex stage body is shaped with the import of natural gas main.
Above-mentioned jet apertures is molded over sub warhead physically.
In two row's jet apertures of above-mentioned symmetrical machining, the shaft axis of two jet apertures of any pair title distribution all intersects on the central axis of natural gas main.
Angle between above-mentioned two symmetrical jet apertures is 20 degree-160 degree.
Angle between above-mentioned two symmetrical jet apertures is 30 degree-120 degree.
Two above-mentioned row's jet apertures are symmetrical with separated time in sub warhead body.
The air intake duct of above-mentioned motor is the air inlet manifold of motor, or the cylinder head intake duct of motor.
Compared with prior art, rock gas shower nozzle radial direction of the present invention is positioned in the air intake duct of motor, and the lumen segmentation of air intake duct is become two symmetrical air flow channels by rock gas shower nozzle; Air flow channel comprises the gradually little high pressure flow path area of flow area and the gradually large negative pressure flow path area of flow area, and high pressure flow path area and negative pressure runner interval are formed with the minimum aditus laryngis of flow area, natural gas main is processed with in rock gas shower nozzle, rock gas shower nozzle is symmetrily processed with the jet apertures that two rows tilt to point to respective negative pressure flow path area, each jet apertures is all connected with natural gas main; Air in air intake duct utilizes the pressure extent formed in negative pressure flow path area when high pressure flow path area flows through and accelerates after aditus laryngis, by suck gas quantity in jet apertures number, realize the automatic regulation and control of mixed gas optimal air-fuel ratio after air and combustion gas mixing.The present invention designs according to bernoulli principle, the throughput of rock gas can be controlled automatically according to the flow of air, the concentration formed after ensureing air mixing remains within the scope of optimal air-fuel ratio, have the advantages that structure is simple, reliability is high, the life-span is long, the combustion gas air-fuel ration control being suitable for low pressure and mesohigh gas source uses.
Accompanying drawing explanation
Fig. 1 is sectional structure schematic diagram of the present invention;
Fig. 2 is the sectional structure schematic diagram of another angle of the present invention;
Fig. 3 is the close-up schematic view of rock gas shower nozzle in Fig. 2.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in further detail.
Fig. 1 to Fig. 3 is structural representation of the present invention.
Reference character is wherein: high pressure flow path area A, negative pressure flow path area B, aditus laryngis C, central axis L, shaft axis Q, middle separated time F, rock gas shower nozzle 1, natural gas main 1a, jet apertures 1b, main rod body 11, convex stage body 12, semiellipse body 13, sub warhead body 14, air intake duct 2, H represent to, T, mixed airflow represents that natural gas flow represents air flow to, K.
Fig. 1 to Fig. 3 is structural representation of the present invention, as shown in the figure, combustion gas air-fuel ratio control device of the present invention, comprise rock gas shower nozzle 1, rock gas shower nozzle 1 radial direction is positioned in the air intake duct 2 of motor, and the lumen segmentation of air intake duct 2 is become two symmetrical air flow channels by this rock gas shower nozzle 1; Air flow channel comprises the gradually little high pressure flow path area A of flow area and the gradually large negative pressure flow path area B of flow area, and between high pressure flow path area A and negative pressure flow path area B, be formed with the minimum aditus laryngis C of flow area, the present invention is simultaneously processed with the natural gas main 1a for transport gas in rock gas shower nozzle 1, this rock gas shower nozzle 1 is symmetrily processed with the jet apertures 1b that two rows tilt to point to respective negative pressure flow path area B, the equal interval of jet apertures 1b often in row is arranged, and the quantity of often arranging jet apertures 1b can carry out suitable setting according to the diameter of air intake duct 2.Each jet apertures 1b is all connected with natural gas main 1a, the pressure extent that air in air intake duct 2 is formed when utilizing bernoulli principle to accelerate after high pressure flow path area A flows through aditus laryngis C in negative pressure flow path area B, by suck gas quantity in jet apertures 1b number, realize the automatic regulation and control of mixed gas optimal air-fuel ratio after air and combustion gas mixing.In prior art, tradition air-fuel ratio control device system all more complicated, its working life and reliability are greatly limited, and be only applicable to mesohigh rock gas, then inapplicable for the low pressure natural gas close to suction tude air pressure, this causes a lot of low pressure natural gas source very inconvenient in actual use.Rock gas shower nozzle 1 is positioned in the air intake duct 2 of motor by the present invention, utilize bernoulli principle, rock gas sucks by the negative pressure relying on the air accelerated after flowing through aditus laryngis C to produce at negative pressure flow path area B, ensure that rock gas and air form the mixed gas of certain air fuel ratio, the concentration of mixed mixed Daqu is remained within the scope of optimal air-fuel ratio.
In embodiment, as seen from Figure 1, air intake duct 2 is processed with assembling radial hole, and rock gas shower nozzle 1 is fixedly mounted in air intake duct 2 through assembling radial hole.
In embodiment, the convex stage body 12 that rock gas shower nozzle 1 comprises main rod body 11 and is connected with main rod body 11 one; The shape of main rod body 11 transverse section is be gradient to large semiellipse body 13 and by the shape being gradient to greatly the asymmetric fusiformis that little sub warhead body 14 is combined to form by little, main rod body 11 extend in air intake duct 2, and convex stage body 12 is located with the outer wall of air intake duct 2 and matched.The shape of the assembling radial hole of air intake duct 2 and the shape of main rod body 11 transverse section suitable.
In embodiment as can be seen from Figures 2 and 3, the center of circle of the semiellipse body 13 of arbitrary transverse section is all dropped on the central axis L of natural gas main 1a, and the exterior edge face of convex stage body 12 is shaped with the import of natural gas main 1a.
Jet apertures 1b of the present invention is molded on sub warhead body 14.
In embodiment, in two row jet apertures 1b of symmetrical machining, the shaft axis Q of two jet apertures 1b of any pair title distribution all intersects on the central axis L of natural gas main 1a.
Angle between above-mentioned two symmetrical jet apertures 1b is 20 degree-160 degree.
Angle between two preferably symmetrical jet apertures 1b is at 30 degree-and 120 degree.
Two row jet apertures 1b are symmetrical with separated time F in sub warhead body 14.
The air intake duct 2 of motor is the air inlet manifold of motor, or the cylinder head intake duct of motor.
The present invention is achieved in that the Cross section Design Cheng You little of rock gas shower nozzle 1 is gradient to greatly, less by being gradient to greatly, the shape of similar asymmetric fusiformis.Rock gas shower nozzle 1 is inserted in prismatic air inlet manifold or cylinder head intake duct, intake manifold or form the aditus laryngis C that flow area reduces between cylinder head intake duct inner chamber and rock gas shower nozzle 1, when air draught is by aditus laryngis C, air-flow accelerates, according to bernoulli principle, when air-flow accelerates, cause local compression to decline, form certain vacuum, such rock gas is just inhaled into, certain density mixed gas is formed, i.e. the mixed gas of certain air fuel ratio after mixing with air.When motor accelerates or load strengthens, because pressurized machine efficiency when middle high load is high, air mass flow strengthens more, when flowing through aditus laryngis C, local compression declines and strengthens, namely the vacuum formed strengthens, this causes the pressure difference between rock gas and air to widen, rock gas is made to spray into intake manifold or cylinder head intake duct by fusiformis rock gas shower nozzle 1 with higher flow velocity, the concentration formed after mixing with air like this remains within the scope of optimal air-fuel ratio, and low pressure, middle pressure, high-pressure natural gas all can move smoothly through shower nozzle, enter in air inlet manifold or cylinder head intake duct and well mix with air.
Claims (10)
1. combustion gas air-fuel ratio control device, comprise rock gas shower nozzle (1), it is characterized in that: described rock gas shower nozzle (1) radial direction is positioned in the air intake duct (2) of motor, the lumen segmentation of air intake duct (2) is become two symmetrical air flow channels by this rock gas shower nozzle (1), described air flow channel comprises the gradually little high pressure flow path area (A) of flow area and the gradually large negative pressure flow path area (B) of flow area, and be formed with the minimum aditus laryngis of flow area (C) between described high pressure flow path area (A) and negative pressure flow path area (B), natural gas main (1a) is processed with in described rock gas shower nozzle (1), and this rock gas shower nozzle (1) is symmetrily processed with the jet apertures (1b) that two rows tilt to point to respective negative pressure flow path area (B), each jet apertures (1b) is all connected with natural gas main (1a), air in described air intake duct (2) utilizes the pressure extent formed in negative pressure flow path area (B) when high pressure flow path area (A) flows through and accelerates after aditus laryngis (C), by suck jet apertures (1b) interior gas quantity number, realize the automatic regulation and control of mixed gas optimal air-fuel ratio after air and combustion gas mixing.
2. combustion gas air-fuel ratio control device according to claim 1, it is characterized in that: described air intake duct (2) is processed with assembling radial hole, described rock gas shower nozzle (1) is fixedly mounted in air intake duct (2) through assembling radial hole.
3. combustion gas air-fuel ratio control device according to claim 2, is characterized in that: the convex stage body (12) that described rock gas shower nozzle (1) comprises main rod body (11) and is connected with main rod body (11) one; The shape of described main rod body (11) transverse section is be gradient to large semiellipse body (13) and by the shape being gradient to greatly the asymmetric fusiformis that little sub warhead body (14) is combined to form by little, described main rod body (11) extend in air intake duct (2), and described convex stage body (12) is located with the outer wall of air intake duct (2) and matched.
4. combustion gas air-fuel ratio control device according to claim 3, it is characterized in that: the center of circle of the semiellipse body (13) described in arbitrary transverse section is all dropped on the central axis (L) of natural gas main (1a), and the exterior edge face of described convex stage body (12) is shaped with the import of natural gas main (1a).
5. combustion gas air-fuel ratio control device according to claim 4, is characterized in that: described jet apertures (1b) is molded on sub warhead body (14).
6. combustion gas air-fuel ratio control device according to claim 5, is characterized in that: in two rows' jet apertures (1b) of described symmetrical machining, the shaft axis (Q) of two jet apertures (1b) of any pair title distribution all intersects on the central axis (L) of natural gas main (1a).
7. combustion gas air-fuel ratio control device according to claim 6, is characterized in that: the angle between described symmetrical two jet apertures (1b) is 20 degree-160 degree.
8. combustion gas air-fuel ratio control device according to claim 7, is characterized in that: the angle between described symmetrical two jet apertures (1b) is 30 degree-120 degree.
9. combustion gas air-fuel ratio control device according to claim 8, is characterized in that: two described rows' jet apertures (1b) are symmetrical with the middle separated time (F) of sub warhead body (14).
10. combustion gas air-fuel ratio control device according to claim 9, is characterized in that: the air inlet manifold that the air intake duct (2) of described motor is motor, or the cylinder head intake duct of motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410644647.8A CN104533675B (en) | 2014-11-14 | 2014-11-14 | Combustion gas air-fuel ratio control device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410644647.8A CN104533675B (en) | 2014-11-14 | 2014-11-14 | Combustion gas air-fuel ratio control device |
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| Publication Number | Publication Date |
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| CN104533675A true CN104533675A (en) | 2015-04-22 |
| CN104533675B CN104533675B (en) | 2017-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410644647.8A Active CN104533675B (en) | 2014-11-14 | 2014-11-14 | Combustion gas air-fuel ratio control device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106993825A (en) * | 2017-05-04 | 2017-08-01 | 黄印坤 | A kind of Arabic shredded tobacco for water pipes |
| CN109826730A (en) * | 2019-03-25 | 2019-05-31 | 安徽华菱汽车有限公司 | A kind of automobile and its inlet duct |
| CN111005824A (en) * | 2019-12-20 | 2020-04-14 | 哈尔滨工程大学 | Intensified flow-guiding type large-flow injection device of gas fuel engine |
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| JPH09268923A (en) * | 1996-04-01 | 1997-10-14 | Mitsubishi Motors Corp | Fuel supplying device of gas engine |
| JP2003090266A (en) * | 2001-09-18 | 2003-03-28 | Honda Motor Co Ltd | Fuel feeding device in internal combustion engine |
| CN202348479U (en) * | 2011-11-18 | 2012-07-25 | 广西玉柴机器股份有限公司 | Gas engine mixer |
| CN203335279U (en) * | 2013-06-19 | 2013-12-11 | 中国船舶重工集团公司第七一一研究所 | Natural gas mixer |
| CN204312209U (en) * | 2014-11-14 | 2015-05-06 | 宁波中策动力机电集团有限公司 | Combustion gas air-fuel ratio control device |
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2014
- 2014-11-14 CN CN201410644647.8A patent/CN104533675B/en active Active
Patent Citations (6)
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| JPH09268923A (en) * | 1996-04-01 | 1997-10-14 | Mitsubishi Motors Corp | Fuel supplying device of gas engine |
| JP2003090266A (en) * | 2001-09-18 | 2003-03-28 | Honda Motor Co Ltd | Fuel feeding device in internal combustion engine |
| JP4767458B2 (en) * | 2001-09-18 | 2011-09-07 | 本田技研工業株式会社 | Fuel supply device for internal combustion engine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106993825A (en) * | 2017-05-04 | 2017-08-01 | 黄印坤 | A kind of Arabic shredded tobacco for water pipes |
| CN109826730A (en) * | 2019-03-25 | 2019-05-31 | 安徽华菱汽车有限公司 | A kind of automobile and its inlet duct |
| CN109826730B (en) * | 2019-03-25 | 2024-02-09 | 安徽华菱汽车有限公司 | Automobile and air inlet device thereof |
| CN111005824A (en) * | 2019-12-20 | 2020-04-14 | 哈尔滨工程大学 | Intensified flow-guiding type large-flow injection device of gas fuel engine |
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| Publication number | Publication date |
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| CN104533675B (en) | 2017-11-07 |
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