CN206647171U - A kind of compression ignition engine system using methanol-based fuel - Google Patents
A kind of compression ignition engine system using methanol-based fuel Download PDFInfo
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- CN206647171U CN206647171U CN201720425595.4U CN201720425595U CN206647171U CN 206647171 U CN206647171 U CN 206647171U CN 201720425595 U CN201720425595 U CN 201720425595U CN 206647171 U CN206647171 U CN 206647171U
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- fuel
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- detonator
- compression ignition
- ignition engine
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Abstract
The utility model discloses a kind of compression ignition engine system using methanol-based fuel, it includes：Compression ignition engine (N101), it has air intake (N101 1) and fuel inlet (N101 2)；Air supply system, it includes the air pressurizing unit (C101) and blender (M101) of series connection, and the outlet of the blender (M101) is connected to the air intake (N101 1)；For fuel system, it includes the fuel tank (J101) and petrolift (P101) of series connection, the downstream connection of petrolift (P101) to the fuel inlet (N101 2)；The online preparing device of detonator (R101), its upstream are also connected to petrolift (P101), are connected to the blender (M101) downstream；And its inside has beds.The detonator that the utility model is prepared online by using methanol-based fuel methanol-based fuel that ignites come compression-ignited in compression ignition engine so that existing compression ignition engine methanol-based fuel can be used to replace diesel fuel completely in the case of without structural modification.
Description
Technical field
The utility model belongs to technical field of internal combustion engines, and in particular to a kind of compression ignition engine using methanol-based fuel
System and its operation method.
Background technology
Methanol-based fuel as a kind of new alternative energy source, with its " it is cheap, economy is high, powerful, wiper ring
The superior functions such as guarantor ", turn into the ideal product for substituting oil.Because methanol is readily ignited, sent out in spark ignitor formula gasoline
Implement methanol-based replacement of fuel technology in motivation in China's comparative maturity, and five provinces and cities (Shanxi, Shaanxi, Shanghai,
Gansu, Guizhou) popularization and application.Comparatively speaking, it is more in short supply than gasoline in China's diesel oil, and diesel engine produces because of its high compression ratio
Sheng Genggao heat power efficiency.Therefore, exploitation methanol-based replacement of fuel technology has more challenge on a diesel engine, also with more reality
Meaning.
Because diesel engine is the high cetane number such as high compression ratio compression ignition engine, polymethoxy dimethyl ether, liquid DME
Liquid ether class A fuel A can be directly compression-ignited as diesel oil；But these alternative fuel exist compared with the methanol of equal calorific value
The problems such as manufacturing process is complicated, cost is higher, economic benefit is poor.Methanol prices are low, the remarkable in economical benefits of diesel oil substitute, but
Its Cetane number is very low, and only 3 or so, pure methanol and high-proportion methanol base fuel is because Cetane number is too low to press
Combustion, the technical difficulty being applied in compression ignition diesel engine are very big.Dimethyl ether easy compression ignition on compression ignition engine, can be used for
The detonator of methanol-based fuel, but because it is in gaseous state under because of normal temperature, therefore need to be equipped with high-pressure storage tanks to store, this is to use
The vehicle of compression ignition engine brings added burden, because high-pressure bottle is inconvenient to carry and potential safety hazard be present.
Methanol-based replacement of fuel technology path on a diesel engine only has two major classes at present：First, start compression ignition with diesel oil,
Then spray into a small amount of methanol from gas phase and realize that low ratio mixes burning；Second, spark plug is installed on cylinder of diesel engine, to light methanol
Base fuel.The former is because of the lower economic benefit unobvious of substitution ratio；The latter is larger to the transformation of the body of diesel engine, difficulty compared with
Height, client are difficult to receive.
It is even complete how in compression ignition engine system to realize that methanol-based fuel substitutes to the large scale of diesel fuel
Substitute, while larger change need not be carried out to internal combustion engine again, and do not need optional equipment detonator high-pressure storage tank again, this
It is this area urgent problem to be solved.
Utility model content
To solve the above problems, the utility model considers the operation principle and methanol-based fuel of compression ignition engine
Combustion characteristics, the deficiencies in the prior art are overcome, develop a kind of compression ignition engine system using methanol-based fuel.Opened
The system of hair can realize the online preparation of gaseous state detonator dimethyl ether (DMEV) and stably, continuously, accurately be supplied to internal combustion engine
Give, solve methanol-based fuel in compression ignition engine because Cetane number it is low can not direct compression ignition technical problem, realize first
Alcohol-based fuel in compression ignition engine to the complete replacement of diesel fuel, and without using high voltage ignition agent storage tank.
The utility model first aspect provides a kind of compression ignition engine system using methanol-based fuel, and its feature exists
In it includes：
Compression ignition engine (N101), it has air intake (N101-1) and fuel inlet (N101-2)；
Air supply system, it includes the air pressurizing unit (C101) and blender (M101) of series connection, the blender (M101)
Outlet be connected to the air intake (N101-1)；
For fuel system, it includes the fuel tank (J101) and petrolift (P101) of series connection, the downstream of petrolift (P101)
It is connected to the fuel inlet (N101-2)；
The online preparing device of detonator (R101), its upstream are also connected to petrolift (P101), are connected to downstream described mixed
Clutch (M101)；And its inside has beds.
Preferably, the blender (M101) is static mixer, its internal gas channel with complications.
Preferably, it is provided between the petrolift (P101) outlet and the online preparing device of the detonator (R101) entrance
At least one heat exchanger to the fuel to preheat.
Preferably, it is provided between the petrolift (P101) outlet and the online preparing device of the detonator (R101) entrance
Two heat exchangers of series connection, upstream are cooling water of internal combustion engine heat exchanger (E101), and downstream is the online preparing device inlet and outlet of detonator
Heat exchanger (E102), to carry out step preheating to the fuel.
Preferably, in the online preparing device inlet outlet heat exchanger (E102) of detonator and the online preparing device of the detonator
(R101) pipeline between entrance is provided with least one electric heater (E103) with the internal combustion engine (N101) cold start-up
The fuel is preheated.
Preferably, the compression ignition engine system using methanol-based fuel described in the utility model can also include one
Individual standby detonator storage tank, so as to when the online preparing device of the detonator just starts or the when of breaking down, to the compression ignition
Detonator is supplied in formula internal combustion engine.
The catalyst for being wherein used to changing into methanol shrink into dimethyl ether or methoxyl group dimethyl ether (DMMN) is known, example
Such as the solid acid catalyst that chemical field is common.
The utility model second aspect provides the compression ignition engine system using methanol-based fuel described in any of the above-described
The operating method of system, comprises the following steps：
A, methanol-based fuel is pumped out from fuel tank (J101) with petrolift (P101), and makes the methanol-based fuel point
For two-way, the first via leads to the fuel inlet (N101-2) of compression ignition engine (N101) as fuel, and the second tunnel, which leads to, ignites
The online preparing device of agent (R101), there by reacting production detonator online, and detonator is led into blender (M101)；With
Air is also passed into blender (M101) by this simultaneously, with air pressurizing unit (C101) so that the detonator fills with the air
Divide and be mixed to get detonator-air mixture；
B, make compression ignition engine successively according to intake stroke, compression stroke, combustion stroke and exhaust stroke iterative cycles,
Wherein, the detonator-air mixture is passed through cylinder via the air intake in intake stroke；Then operation compression
Stroke, at this stroke end by the detonator-air mixture compression ignition；Then first via fuel penetrating cylinder is burnt
So that compression ignition engine runs combustion stroke, and externally do work；Finally, the exhaust stroke is run, combustion tail gas is discharged
Cylinder.
Wherein described second tunnel methanol-based fuel accounts for the 5-10% of the methanol-based fuel total flow pumped out, the first via first
Alcohol-based fuel accounts for the 90-95% of the methanol-based fuel total flow pumped out.
In the preferred scheme of the utility model second aspect, in step, the second tunnel methanol-based fuel is towards igniting
Before the online preparing device of agent, successively by cooling water of internal combustion engine heat exchanger E101 and the online preparing device inlet outlet heat exchanger of detonator
E102, to carry out step preheating to the fuel and make the fuel be gasified.
In the preferred scheme of the utility model second aspect, in compression ignition engine Cold Start, in step A
In, make the second tunnel methanol-based fuel that it be preheated and be gasified by the electric heater E103.
In the preferred scheme of the utility model second aspect, the methanol quality content of the methanol-based fuel is 50-
100%, preferably 70-95%, more preferably 80-90%.
In the preferred scheme of the utility model second aspect, the detonator is dimethyl ether or methoxyl group dimethyl ether
(DMMN) the other ethers detonator materials or by methanol prepared, or the molecule such as C8-C12 of similar diesel oil straight chain or isomeric alkane
Hydrocarbon and other compounds that can with compression ignition.
The beneficial effects of the utility model：
1st, compression ignition engine system of the present utility model is real in the case where that need not carry out structural modification to internal combustion engine
Show complete replacement of the methanol-based fuel to diesel fuel, while do not need optional equipment to be used for the high pressure for storing detonator again
Tank.
2nd, the utility model carries out methanol evaporation using engine exhaust heat gives birth to the online catalytic and dehydration reaction of small part methanol
The other detonator materials prepared into dimethyl ether or methoxyl group dimethyl ether (DMMN) or by methanol, overall thermal is improved using effect
Rate.
3rd, it is the online Efficient Conversion of raw material into gaseous state two that compression ignition engine system of the present utility model, which uses liquid methanol,
Methyl ether (DMEV) or methoxyl group dimethyl ether (DMMN) or the other detonator materials prepared by methanol are compressing as detonator
It is compression-ignited in stroke, and then the low-cetane methanol-based fuel fed in combustion stroke that ignites, realize detonator
It is online to prepare and stably, continuously, accurately supplied to internal combustion engine so that compression ignition engine can carry out generation with methanol-based fuel completely
For diesel fuel, while avoid while carry the bifuel system of high voltage ignition agent storage tank and methanol-based fuel and bring not
Just.
4th, the utility model had both been different from the compression ignition to high cetane number liquid fuel of general diesel engine, also different from right
The spark ignitor of the methanol-based fuel of diesel engine is reequiped, and it is complete that i.e. achievable methanol-based fuel need not be changed to diesel engine
Full diesel oil substitute fuel, and keep the power performance of engine not reduce.Both 1/3 or so fuel cost can have been saved, again can be with
The discharge of gaseous contaminant, PM2.5 and SO is greatly lowered2Discharge close to zero, there is good economic benefit and environmental protection
Benefit.By closely about ten years NORTHWEST CHINA area diesel oil and methanol the market price exemplified by contrasted, methanol prices are probably
1/3 or so of diesel-fuel price.Calculate by the current market price of equal calorific value, 2t methanol (about 4000RMB) and additive are (about
1t diesel oil (6500-7500RMB) 500RMB) is substituted, then often economic benefit caused by replacement 1t diesel oil is 2000-3000RMB.
China's about 200,000,000 tons of diesel oil of consumption in 2015, it is assumed that methanol-based replacement of fuel diesel fuel ratio is 10%, then, it is annual caused
Economic benefit is about the RMB of 400-600 hundred million.Therefore there is obvious economy using the compression ignition engine system of methanol-based fuel
And social benefit.
Brief description of the drawings
Fig. 1 is the operation principle flow chart of the compression ignition engine system of the present utility model using methanol-based fuel；
Reference is：N101, compression ignition engine；N101-1, air intake；N101-2, fuel inlet；C101, sky
Gas booster；M101, blender；J101, fuel tank；P101, petrolift；The online preparing device of R101, detonator；E101 and
E102- heat exchangers；E101, cooling water of internal combustion engine heat exchanger；The online preparing device inlet outlet heat exchanger of E102, detonator；E103, electricity
Heater；P, pressure controller；T, temperature controller.
Embodiment
Compression ignition engine system of the present utility model using methanol-based fuel is added on existing compression ignition engine
The devices such as preparation and heat exchange mounted in line detonator, and main fuel methanol-based fuel common fuel case, and be gasification, temperature control, tune
The system for pressing integration, including：Compression ignition engine 101, it has air intake N101-1 and fuel inlet N101-2；Supply
System, it includes the air pressurizing unit C101 of series connection and blender M101, the outlet of the blender M101 are connected to the sky
Gas entrance N101-1；For fuel system, it includes the fuel tank J101 and petrolift P101 of series connection, and petrolift P101 downstream connects
It is connected to the fuel inlet N101-2；The online preparing device R101 of detonator, its upstream is also connected to petrolift P101, connected downstream
It is connected to the blender M101；And its inside has beds；Wherein blender M101 upstreams are respectively connecting to the sky
The gas booster C101 and online preparing device R101 of the detonator, is connected to the air intake N101-1 downstream.It is described mixed
Clutch M101 is static mixer, its internal gas channel with complications；Export in the petrolift P101 and ignited with described
At least one heat exchanger is provided between the online preparing device R101 entrances of agent to be preheated to the fuel.In the present embodiment
The petrolift P101 outlets are with being provided with two heat exchangers connected, upstream between the online preparing device R101 entrances of the detonator
It is cooling water of internal combustion engine heat exchanger E101, downstream is the online preparing device inlet outlet heat exchanger E102 of detonator, with to the fuel
Carry out step preheating；The present embodiment is also in the online preparing device inlet outlet heat exchanger of detonator and the online preparing device of the detonator
Pipeline between entrance be provided with least one electric heater E103 with the internal combustion engine N101 cold start-ups to the fuel
Preheated.
Now operation principle combination accompanying drawing 1 of the present utility model is illustrated：
Embodiment：Internal combustion engine 1 of the present utility model is anti-according to intake stroke, compression stroke, combustion stroke and exhaust stroke
Multiple circulation；
In case of a cold start, petrolift P101 pumps out methanol-based fuel from fuel tank J101, and makes the first
Alcohol-based fuel is divided into two-way, and wherein first via methanol-based fuel accounts for the 90-95% of the methanol-based fuel total flow pumped out, as combustion
Fuel inlet N101-2 of the material towards compression ignition engine N101；It is total that second tunnel methanol-based fuel accounts for the methanol-based fuel pumped out
The 5-10% of flow, then methanol temperature is set to reach optimum response device feeding temperature 200-250 under electric heater E103 heating
In the range of DEG C, for example, 220 DEG C, pressure 0.2913MPa, subsequently into the online preparing device R101 of detonator, make in catalyst
Under, methanol leaves the online preparing device R101 of detonator after being converted into dimethyl ether, and this reaction is exothermic reaction, leaves now gaseous state
The temperature of dimethyl ether is, for example, 351.8 DEG C, pressure 0.2513MPa, subsequently into the online preparing device inlet and outlet heat exchange of detonator
Device E102, mixed after heat exchange into blender M101 with the air pressurizing unit C101 air come in, form temperature as 84.7 DEG C,
Pressure is 0.1213MPa detonator-air mixture, subsequently into internal combustion engine N101 air intakes N101-1；Internal combustion engine
Temperature is 84.7 in intake stroke according to intake stroke, compression stroke, combustion stroke and exhaust stroke iterative cycles by N101
DEG C, detonator-air mixture that pressure is 0.1213MPa sucks cylinder via the air intake N101-1；Then run
Compression stroke, by the detonator-air mixture compression ignition；Now first via methanol fuel sprays into cylinder and is ignited and burnt
So that internal combustion engine operation combustion stroke, and externally do work；Finally, the exhaust stroke is run, combustion tail gas is discharged into cylinder.
After internal combustion engine 101 starts normal operation, then carry out heating methanol base fuel without electric heater E103, but more than using
Heat utilization mode is heated.Petrolift P101 pumps out methanol-based fuel from fuel tank J101, and makes the methanol-based
Fuel is divided into two-way, and first via methanol-based fuel accounts for the 90-95% of the methanol-based fuel total flow pumped out, leads to pressure as fuel
Combustion internal combustion engine N101 fuel inlet N101-2, the second tunnel methanol-based fuel account for the 5- of the methanol-based fuel total flow pumped out
10%, it is 100 DEG C to be introduced into temperature after cooling water of internal combustion engine heat exchanger E101 is exchanged heat with cooling water of internal combustion engine, and pressure is
0.3013MPa, enter back into the online preparing device inlet outlet heat exchanger E102 of detonator and leave the temperature of the online preparing device of detonator
For 351.8 DEG C, pressure is that 0.2513MPa gaseous dimethyl is exchanged heat, and it is 220 DEG C to form temperature, pressure 0.2913MPa
Methanol, subsequently into the online preparing device R101 of detonator, under catalyst action, methanol is converted into after dimethyl ether to leave and ignited
The online preparing device R101 of agent, now the temperature of gaseous dimethyl is 351.8 DEG C, pressure 0.2513MPa, subsequently into detonator
Online preparing device inlet outlet heat exchanger E102, is mixed after heat exchange into the blender M101 and air pressurizing unit C101 air come in
Close, form temperature as 84.7 DEG C, pressure is 0.1213MPa detonator-air mixture, subsequently into internal combustion engine N101 air
Entrance N101-1；Internal combustion engine N101 is according to intake stroke, compression stroke, combustion stroke and exhaust stroke iterative cycles, in air-breathing
In stroke by temperature be 84.7 DEG C, pressure be 0.1213MPa detonator-air mixture via the air intake N101-1
Suck cylinder；Then compression stroke is run, by the detonator-air mixture compression ignition；Now first via methanol fuel sprays into
Cylinder, which is ignited, to be burnt so that internal combustion engine operation combustion stroke, and is externally done work；Finally, the exhaust stroke is run, will
Combustion tail gas discharges cylinder.
Claims (5)
1. a kind of compression ignition engine system using methanol-based fuel, it is characterised in that it includes：
Compression ignition engine (N101), it has air intake (N101-1) and fuel inlet (N101-2)；
Air supply system, it includes the air pressurizing unit (C101) and blender (M101) of series connection, and blender (M101's) goes out
Mouth is connected to the air intake (N101-1)；
For fuel system, it includes the fuel tank (J101) and petrolift (P101) of series connection, the downstream connection of petrolift (P101)
To the fuel inlet (N101-2)；
The online preparing device of detonator (R101), its upstream are also connected to petrolift (P101), are connected to the blender downstream
(M101)；And its inside has beds.
2. compression ignition engine system according to claim 1, it is characterised in that the blender (M101) is static mixed
Clutch, its internal gas channel with complications.
3. compression ignition engine system according to claim 1, it is characterised in that the petrolift (P101) outlet with
At least one heat exchanger is provided between the online preparing device of detonator (R101) entrance to be preheated to the fuel.
4. compression ignition engine system according to claim 1, it is characterised in that the petrolift (P101) outlet with
Two heat exchangers of series connection are provided between the online preparing device of detonator (R101) entrance, upstream is cooling water of internal combustion engine heat exchange
Device (E101), downstream are the online preparing device inlet outlet heat exchangers (E102) of detonator, to carry out step preheating to the fuel.
5. compression ignition engine system according to claim 4, it is characterised in that in the online preparing device inlet and outlet of detonator
Pipeline between heat exchanger (E102) and the online preparing device of the detonator (R101) entrance is provided with least one electric heater
(E103) to be preheated in the internal combustion engine (N101) cold start-up to the fuel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720425595.4U CN206647171U (en) | 2017-04-21 | 2017-04-21 | A kind of compression ignition engine system using methanol-based fuel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720425595.4U CN206647171U (en) | 2017-04-21 | 2017-04-21 | A kind of compression ignition engine system using methanol-based fuel |
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| CN206647171U true CN206647171U (en) | 2017-11-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107084045A (en) * | 2017-04-21 | 2017-08-22 | 深圳瑞科天启科技有限公司 | The compression ignition engine system and its operation method of a kind of use methanol-based fuel |
| CN113669156A (en) * | 2021-08-11 | 2021-11-19 | 哈尔滨工程大学 | Direct injection type dual-fuel engine using polymethoxy dimethyl ether prepared by methanol hydrolysis as ignition agent and control method thereof |
-
2017
- 2017-04-21 CN CN201720425595.4U patent/CN206647171U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107084045A (en) * | 2017-04-21 | 2017-08-22 | 深圳瑞科天启科技有限公司 | The compression ignition engine system and its operation method of a kind of use methanol-based fuel |
| CN113669156A (en) * | 2021-08-11 | 2021-11-19 | 哈尔滨工程大学 | Direct injection type dual-fuel engine using polymethoxy dimethyl ether prepared by methanol hydrolysis as ignition agent and control method thereof |
| CN113669156B (en) * | 2021-08-11 | 2023-02-14 | 哈尔滨工程大学 | Direct injection type dual-fuel engine using polymethoxy dimethyl ether prepared by methanol hydrolysis as ignition agent and control method thereof |
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