CN213654983U - Fuel preparation and supply system for active precombustion chamber - Google Patents
Fuel preparation and supply system for active precombustion chamber Download PDFInfo
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- CN213654983U CN213654983U CN202022056253.4U CN202022056253U CN213654983U CN 213654983 U CN213654983 U CN 213654983U CN 202022056253 U CN202022056253 U CN 202022056253U CN 213654983 U CN213654983 U CN 213654983U
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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Abstract
The present invention relates to a fuel preparation and supply system for an active prechamber, which mainly comprises a conventional fuel supply system and a fuel-air mixture preparation and supply system. The conventional fuel supply system comprises an oil tank, a fuel pipeline, a low-pressure oil pump, a high-pressure oil pump, an oil nozzle, a combustion chamber and an oil tank one-way valve, and the fuel-air mixture preparation and supply system comprises the oil tank, the fuel pipeline, the low-pressure oil pump, the oil nozzle, a premixing chamber, an air pump, a pressure regulating valve, a fuel nozzle, a pre-combustion chamber spark plug, the combustion chamber, a premixing chamber oil return one-way valve, a premixing chamber air inlet one-way valve and a pre-combustion chamber one-way valve. The utility model also discloses a fuel preparation and supply method for the initiative precombustor. The utility model is used for the fuel preparation and the feed system simple structure of initiative precombustor can reach simultaneously optimize the burning, improve effects such as emission, fuel economy.
Description
Technical Field
The utility model relates to a fuel preparation and feed system especially relates to a fuel preparation and feed system for initiative precombustion chamber, belongs to fuel preparation and feed system for spark-ignition engine.
Background
With the increasing demands on engine emissions and efficiency, gasoline engines increasingly use lean-burn technology to increase engine thermal efficiency and reduce emissions pollutants, whereas lean fuel mixtures are generally difficult to ignite reliably and reliably with conventional spark plugs.
The spark plug in the precombustion chamber is used for igniting fuel in the precombustion chamber, flame is sprayed out through the small holes, and a lean mixture in the cylinder is ignited so as to expand the lean combustion limit. In patent application WO2010EP51164 entitled "LASER SPARK PLUG AND PRE-CHAMBER MODULE burner, the Bosch company proposes an example of a passive prechamber, which during compression, the combustible mixture is forced into the prechamber through a prechamber opening, ignited by a spark PLUG to form a jet, igniting the in-cylinder mixture outside the prechamber.
In patent application EP20150002620 entitled "turbo JET injection PRE-CHAMBER COMBUSTION SYSTEM FOR SPARK IGNITION ENGINES", an example of an active prechamber is proposed by the company Mahle, in which the injector is integrated in a prechamber SPARK plug, the fuel is injected directly into the prechamber, atomized in the prechamber to form a combustible mixture, ignited by the IGNITION of the SPARK plug to form a JET, igniting the in-cylinder mixture outside the prechamber.
Although the above patents at least partially achieve more reliable ignition of lean fuel mixtures than conventional open spark plugs, they still suffer from unclean scavenging, difficult atomization, susceptibility to soot formation, and complex construction.
SUMMERY OF THE UTILITY MODEL
It is an object of the present invention to overcome the above-mentioned deficiencies of the prior art by providing a fuel preparation and supply system for an active prechamber.
The purpose of the utility model can be realized through the following technical scheme:
a fuel preparation and supply system for an active precombustion chamber comprises an oil tank, a gas bottle, a low-pressure oil pump, a first oil nozzle, a premixing chamber, an air pump, a pressure regulating valve, a gas nozzle, a precombustion chamber spark plug, a high-pressure oil pump, a second oil nozzle, a combustion chamber, an oil tank one-way valve, a premixing chamber oil return one-way valve for preventing fuel oil from continuously accumulating, a premixing chamber air inlet one-way valve for ensuring that the premixing chamber has enough air and a precombustion chamber one-way valve for preventing high-temperature gas from directly contacting with a pipeline, wherein the fuel preparation and supply system for the active precombustion chamber adopts different connection modes to form different fuel preparation and supply systems, wherein one of the connection modes is as follows:
the import of oil tank with the oil tank check valve is connected, the export of oil tank is connected with low-pressure oil pump through the fuel oil pipeline, low-pressure oil pump still passes through alone the fuel oil pipeline with set up in premix the first fuel sprayer on the room is connected, low-pressure oil pump along the fuel oil pipeline still pass through high-pressure oil pump alone with set up in second fuel sprayer on the combustion chamber is connected, premix the room still pass through premix room oil return check valve with the oil tank is connected, premix the room still alone with premix room air inlet check valve is connected, premix the room along the fuel oil pipeline still pass through in proper order behind air pump, pressure regulating valve, gas nozzle and the precombustion room check valve with set up in the precombustion room spark plug on the combustion chamber is connected.
Further, another connection mode is as follows:
the import of oil tank with the oil tank check valve is connected, the export of oil tank is connected with low-pressure oil pump through the fuel oil pipeline, low-pressure oil pump still passes through alone the fuel oil pipeline with set up in first fuel sprayer on the oil tank is connected, low-pressure oil pump along the fuel oil pipeline still passes through high-pressure oil pump alone with set up in second fuel sprayer on the combustion chamber is connected, place in the first fuel sprayer in the oil tank cavity along the fuel oil pipeline with the air pump is connected, the air pump along the fuel oil pipeline still passes through in proper order behind pressure regulating valve, gas nozzle and the precombustion chamber check valve with set up in precombustion chamber spark plug on the combustion chamber is connected.
Further, another connection mode is as follows:
the import of oil tank with the oil tank check valve is connected, the export of oil tank is connected with the low-pressure oil pump through the fuel oil pipeline, the low-pressure oil pump along the fuel oil pipeline still alone through the high-pressure oil pump with set up in second fuel sprayer on the combustion chamber is connected, the gas bottle along the fuel oil pipeline passes through pressure regulating valve with set up in gas nozzle on the precombustion chamber is connected, the precombustion chamber still alone with the precombustion chamber check valve that admits air is connected, the precombustion chamber along the fuel oil pipeline still passes through in proper order air pump, another pressure regulating valve, another gas nozzle with behind the precombustion chamber check valve with set up in precombustion chamber spark plug on the combustion chamber is connected.
Further, another connection mode is as follows:
the two groups of gas bottles are respectively connected with a gas nozzle arranged on the combustion chamber and a gas nozzle arranged on the premixing chamber through the respective pressure regulating valves, the premixing chamber is connected with a pre-combustion chamber spark plug arranged on the combustion chamber after sequentially passing through the air pump, the other pressure regulating valve, the other gas nozzle and the pre-combustion chamber one-way valve along the fuel oil pipeline, and the premixing chamber is also independently connected with the premixing chamber air inlet one-way valve.
Further, another connection mode is as follows:
the single group of gas bottles are respectively connected with a gas nozzle arranged on the combustion chamber and a gas nozzle arranged on the premixing chamber after passing through the pressure regulating valve, the premixing chamber is also sequentially connected with a pre-combustion chamber spark plug arranged on the combustion chamber after passing through the air pump, the other pressure regulating valve, the other gas nozzle and the pre-combustion chamber one-way valve along the fuel oil pipeline, and the premixing chamber is also independently connected with the premixing chamber air inlet one-way valve.
Further, the pre-chamber spark plug employs a spark plug with a pre-chamber structure.
Further, the gas bottle adopts a high-pressure gas bottle or a liquefied gas bottle.
The utility model also provides a combustion ignition working method based on a fuel preparation and feed system for initiative precombustor, the method includes following step:
step 1: drawing fuel oil from the fuel tank by the low-pressure oil pump, and injecting the fuel oil into the premixing chamber through the first oil nozzle to produce near-saturated steam;
step 2: the nearly saturated steam is compressed into high-pressure gas through the air pump, the pressure is regulated into target pressure through the pressure regulating valve, and the on-off is controlled through the gas nozzle;
and step 3: injecting the fuel steam finally obtained in the whole process of the step 2 into the spark plug of the pre-combustion chamber, igniting fuel gas through the spark plug, and injecting flame outwards to form jet flame;
and 4, step 4: and (3) performing normal fuel injection by the high-pressure oil pump through the second fuel injection nozzle, injecting the fuel into the combustion chamber, and igniting by the jet flame obtained in the step (3) to perform normal combustion ignition work.
Further, in the combustion ignition working method, the pre-chamber spark plug adopts a spark plug with a pre-chamber structure.
Further, in the combustion ignition working method, the gas bottle adopts a high-pressure gas bottle or a liquefied gas bottle.
Compared with the prior art, the utility model has the advantages of it is following:
1. the structure is simple: compared with an active pre-combustion chamber in which an oil nozzle is integrated on a spark plug of the pre-combustion chamber and fuel is directly injected in the pre-combustion chamber, the method has the advantages of simple system structure, small occupied space and no need of additionally changing an engine cylinder cover.
2. The fuel system is simple: compared with multi-fuel injection, such as direct injection of combustible gas such as natural gas into the pre-combustion chamber, the method does not need multiple fuels, only needs single fuel, reduces the system cost, and increases the use convenience and maintainability.
3. Easy to burn: compared with an active precombustion chamber in which an oil nozzle is integrated with a spark plug of the precombustion chamber and fuel is directly injected in the precombustion chamber, combustible gas premixed with air is directly injected into the precombustion chamber, so that the combustion is easier.
4. The scavenging action is strong: compared with a passive precombustion chamber, the gas is injected into the precombustion chamber, so that burnt waste gas in the precombustion chamber can be quickly and conveniently swept out.
5. Carbon deposition prevention: compared with an active pre-combustion chamber in which an oil nozzle is integrated with a spark plug of the pre-combustion chamber and fuel is directly sprayed in the pre-combustion chamber, gas is sprayed into the pre-combustion chamber, no oil film remained near the spark plug exists, and carbon deposition is not easy to generate.
6. And (3) improving the emission: the combustion is more sufficient, and the emission of pollutants such as unburned hydrocarbon and the like is reduced.
7. Fuel saving: the combustion is more sufficient, and efficiency is higher, saves fuel.
8. Expanding the lean combustion limit of lean combustion: compared with a passive precombustion chamber, the jet flame sprayed out of the precombustion chamber is more controllable, the ignition energy is higher, the stability is better, the flame jet speed is higher, the penetration distance is longer, and the lean combustion limit of lean combustion can be further expanded.
Drawings
To further clarify the above and other advantages and features of various embodiments of the present invention, a more particular description of various embodiments of the invention will be rendered by reference to the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. Also, the relative positions and sizes of the respective portions shown in the drawings are exemplary, and should not be understood as uniquely determining positional or dimensional relationships between the respective portions.
FIG. 1 is a schematic view of a first embodiment of a fuel preparation and supply system for an active prechamber according to the present invention;
FIG. 2 is a schematic diagram of a second embodiment of a fuel preparation and supply system for an active prechamber according to the present invention;
FIG. 3 is a schematic view of a third embodiment of a fuel preparation and supply system for an active prechamber according to the present invention;
FIG. 4 is a schematic diagram of a fourth embodiment of a fuel preparation and supply system for an active prechamber according to the present invention;
FIG. 5 is a schematic view of a fifth embodiment of a fuel preparation and supply system for an active prechamber according to the present invention;
in the figure, 1 is an oil tank, 2 is a gas cylinder, 3 is a low-pressure oil pump, 4 is a first oil nozzle, 5 is a premixing chamber, 6 is an air pump, 7 is a pressure regulating valve, 8 is a gas nozzle, 9 is a pre-combustion chamber spark plug, 10 is a high-pressure oil pump, 11 is a second oil nozzle, 12 is a combustion chamber, 13 is an oil tank check valve, 14 is a premixing chamber oil return check valve, 15 is a premixing chamber air inlet check valve, and 16 is a pre-combustion chamber check valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.
Examples
Example 1:
as shown in FIG. 1, the present invention relates to a fuel preparation and supply system for an active prechamber, comprising a conventional fuel supply system and a fuel-air mixture preparation and supply system. The conventional fuel supply system comprises an oil tank 1, a fuel pipeline, a low-pressure oil pump 3, a high-pressure oil pump 10, a second oil nozzle 11, a combustion chamber 12 and an oil tank check valve 13, wherein the fuel-air mixture preparation and supply system comprises the oil tank 1, the fuel pipeline 2, the low-pressure oil pump 3, a first oil nozzle 4, a premixing chamber 5, an air pump 6, a pressure regulating valve 7, a gas nozzle 8, a pre-combustion chamber spark plug 9 and the combustion chamber 12.
The above design can complete the fuel preparation and supply for the active prechamber, and the preferable scheme is given on the basis of the scheme:
the premixing chamber 5 is provided with a premixing chamber air inlet one-way valve 15, so that the premixing chamber is ensured to have enough air. The premixing chamber 5 is communicated with the oil tank 1 through a premixing chamber oil return one-way valve 14, and the fuel oil is prevented from accumulating continuously. The pre-chamber spark plug 9 is a spark plug with a pre-chamber structure. And a pre-chamber check valve 16 is installed on the pre-chamber spark plug 9 to prevent high-temperature gas from directly contacting with the pipeline.
As shown in fig. 1, a fuel preparation and supply method using the fuel preparation and supply system for an active prechamber of embodiment 1 includes the steps of:
the low-pressure oil pump 3 extracts fuel oil from the oil tank 1, the fuel oil is sprayed into the premixing chamber 5 through the first oil nozzle 4 to produce near saturated steam, the near saturated steam is compressed into high-pressure gas through the air pump 6, the pressure is adjusted to be target pressure through the pressure adjusting valve 7, the on-off is controlled through the gas nozzle 8, the fuel oil steam is sprayed into the pre-combustion chamber spark plug 9, the fuel gas is ignited through the spark plug, and flame is sprayed outwards to form jet flame.
The high-pressure oil pump 10 and the second oil nozzle 11 perform normal fuel injection, and inject the fuel into the combustion chamber 12, and the fuel is ignited by the jet flame to perform normal combustion and work.
Example 2
As shown in FIG. 2, the present invention relates to a fuel preparation and supply system for an active prechamber, comprising a conventional fuel supply system and a fuel-air mixture preparation and supply system. The conventional fuel supply system comprises an oil tank 1, a fuel pipeline, a low-pressure oil pump 3, a high-pressure oil pump 10, a second oil nozzle 11, a combustion chamber 12 and an oil tank check valve 13, wherein the fuel-air mixture preparation and supply system comprises the oil tank 1, the fuel pipeline, the low-pressure oil pump 3, a first oil nozzle 4, an air pump 6, a pressure regulating valve 7, a gas nozzle 8, a pre-combustion chamber spark plug 9, the combustion chamber 12 and a pre-combustion chamber check valve 16.
The oil tank 1 is provided with a certain cavity, so that the oil sprayer can spray oil mist into the cavity when the oil tank is filled with oil. The pre-chamber spark plug 9 is a spark plug with a pre-chamber structure. And a pre-chamber check valve 16 is installed on the pre-chamber spark plug 9 to prevent high-temperature gas from directly contacting with the pipeline.
Example 3
As shown in fig. 3, the present invention relates to a fuel preparation and supply system for an active prechamber, comprising a conventional fuel supply system and a fuel gas preparation and supply system for a secondary fuel. The conventional fuel supply system comprises a fuel tank 1, a fuel pipeline, a low-pressure oil pump 3, a high-pressure oil pump 10, a second fuel spray nozzle 11, a combustion chamber 12 and a fuel tank check valve 13, wherein the second fuel gas fuel preparation and supply system comprises a gas cylinder 2 (a high-pressure gas cylinder/liquefied gas cylinder can be adopted), a pressure regulating valve 7, a gas nozzle 8, a pre-mixing chamber 5, an air pump 6, another pressure regulating valve 7, another gas nozzle 8, a pre-combustion chamber spark plug 9, a combustion chamber 12, a pre-mixing chamber air inlet check valve 15 and a pre-combustion chamber check valve 16.
Example 4
As shown in fig. 4, the present invention relates to a fuel preparation and supply system for an active prechamber, comprising a conventional fuel supply system and a fuel gas preparation and supply system for a secondary fuel. The conventional fuel supply system includes a gas cylinder 2 (a high-pressure gas cylinder/liquefied gas cylinder may be specifically employed), a pressure regulating valve 7, a gas nozzle 8, a combustion chamber 12, and the second fuel gas fuel preparation and supply system includes another group of gas cylinders 2 (a high-pressure gas cylinder/liquefied gas cylinder may be specifically employed), another pressure regulating valve 7, another gas nozzle 8, a pre-mixing chamber 5, an air pump 6, yet another pressure regulating valve 7, yet another gas nozzle 8, a pre-combustion chamber spark plug 9, a combustion chamber 12, a pre-mixing chamber intake check valve 15, a pre-combustion chamber check valve 16.
Example 5
As shown in fig. 5, the present invention relates to a fuel preparation and supply system for an active prechamber, comprising a conventional fuel supply system and an air-fuel mixture preparation and supply system. The conventional fuel supply system includes a gas cylinder 2 (a high-pressure gas cylinder/liquefied gas cylinder may be specifically adopted), a pressure regulating valve 7, a gas nozzle 8, a combustion chamber 12, and the preparation and supply system of the air-fuel mixture includes the gas cylinder 2 (a high-pressure gas cylinder/liquefied gas cylinder may be specifically adopted), another gas nozzle 8, a pre-mixing chamber 5, an air pump 6, another pressure regulating valve 7, another gas nozzle 8, a pre-combustion chamber spark plug 9, a combustion chamber 12, a pre-mixing chamber intake check valve 15, and a pre-combustion chamber check valve 16.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. The utility model provides a fuel preparation and feed system for initiative precombustion chamber, its characterized in that, this system includes oil tank (1), gas bottle (2), low-pressure oil pump (3), first fuel sprayer (4), premix chamber (5), air pump (6), pressure regulating valve (7), gas nozzle (8), precombustion chamber spark plug (9), high-pressure oil pump (10), second fuel sprayer (11), combustion chamber (12), oil tank check valve (13), premix chamber oil return check valve (14), premix chamber air inlet check valve (15) and precombustion chamber check valve (16), through adopting different connected modes to constitute different fuel preparation and feed system for initiative precombustion chamber, one of them the connected mode is:
the inlet of the oil tank (1) is connected with the oil tank one-way valve (13), the outlet of the oil tank (1) is connected with a low-pressure oil pump (3) through a fuel pipeline, the low-pressure oil pump (3) is connected with a first oil nozzle (4) arranged on the premixing chamber (5) through the fuel pipeline, the low-pressure oil pump (3) is connected with a second oil nozzle (11) arranged on the combustion chamber (12) through a high-pressure oil pump (10) along the fuel pipeline, the premixing chamber (5) is connected with the oil tank (1) through the premixing chamber oil return one-way valve (14), the premixing chamber (5) is connected with the premixing chamber air inlet one-way valve (15) alone, and the premixing chamber (5) sequentially passes through the air pump (6), the pressure regulating valve (7) along the fuel pipeline, The gas nozzle (8) and the pre-combustion chamber one-way valve (16) are connected with a pre-combustion chamber spark plug (9) arranged on the combustion chamber (12).
2. A fuel preparation and delivery system for an active prechamber according to claim 1, wherein another of said connections is:
the inlet of the oil tank (1) is connected with the oil tank one-way valve (13), the outlet of the oil tank (1) is connected with the low-pressure oil pump (3) through a fuel pipeline, the low-pressure oil pump (3) is also independently connected with a first oil nozzle (4) arranged on the oil tank (1) through the fuel oil pipeline, the low-pressure oil pump (3) is also connected along the fuel line solely via a high-pressure oil pump (10) to a second fuel injector (11) arranged on the combustion chamber (12), the first oil nozzle (4) is connected with the air pump (6) along the fuel oil pipeline through a cavity arranged in the oil tank (1), the air pump (6) is connected with a pre-combustion chamber spark plug (9) arranged on the combustion chamber (12) along the fuel pipeline after sequentially passing through the pressure regulating valve (7), the fuel nozzle (8) and the pre-combustion chamber one-way valve (16).
3. A fuel preparation and delivery system for an active prechamber according to claim 1, wherein another of said connections is:
the inlet of the oil tank (1) is connected with the oil tank one-way valve (13), the outlet of the oil tank (1) is connected with the low-pressure oil pump (3) through a fuel pipeline, the low-pressure oil pump (3) is also connected along the fuel line solely via a high-pressure oil pump (10) to a second fuel injector (11) arranged on the combustion chamber (12), the gas bottle (2) is connected with a gas nozzle (8) arranged on the premixing chamber (5) along the fuel pipeline through the pressure regulating valve (7), the premixing chamber (5) is also connected with the premixing chamber air inlet one-way valve (15) separately, the premixing chamber (5) is connected with a pre-chamber spark plug (9) arranged on the combustion chamber (12) after sequentially passing through the air pump (6), the pressure regulating valve (7), the gas nozzle (8) and the pre-chamber one-way valve (16) along the fuel pipeline.
4. A fuel preparation and delivery system for an active prechamber according to claim 1, wherein another of said connections is:
two sets of gas bottle (2) are through respective pressure regulating valve (7) respectively with set up in gas nozzle (8) on combustion chamber (12) and set up in gas nozzle (8) on premixing room (5) are connected, premixing room (5) are along the fuel oil pipeline still in proper order through air pump (6), another pressure regulating valve (7), another gas nozzle (8) and after precombustion room check valve (16) with set up in precombustion room spark plug (9) on combustion chamber (12) are connected, premixing room (5) still alone with premixing room air inlet check valve (15) are connected.
5. A fuel preparation and delivery system for an active prechamber according to claim 1, wherein another of said connections is:
the single group of gas bottles (2) are respectively connected with a gas nozzle (8) arranged on the combustion chamber (12) and a gas nozzle (8) arranged on the premixing chamber (5) after passing through the pressure regulating valve (7), the premixing chamber (5) is also connected with a pre-combustion chamber spark plug (9) arranged on the combustion chamber (12) after passing through the air pump (6), the other pressure regulating valve (7), the other gas nozzle (8) and the pre-combustion chamber one-way valve (16) along the fuel pipeline in sequence, and the premixing chamber (5) is also independently connected with the premixing chamber air inlet one-way valve (15).
6. A fuel preparation and delivery system for an active prechamber according to any of claims 1-5, characterized in that the prechamber spark plug (9) is a spark plug with a prechamber structure.
7. A fuel preparation and supply system for an active prechamber according to any of claims 1-5, characterized in that the gas bottle (2) is a high-pressure gas bottle or a liquefied gas bottle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022056253.4U CN213654983U (en) | 2020-09-18 | 2020-09-18 | Fuel preparation and supply system for active precombustion chamber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022056253.4U CN213654983U (en) | 2020-09-18 | 2020-09-18 | Fuel preparation and supply system for active precombustion chamber |
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| CN213654983U true CN213654983U (en) | 2021-07-09 |
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| CN202022056253.4U Active CN213654983U (en) | 2020-09-18 | 2020-09-18 | Fuel preparation and supply system for active precombustion chamber |
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