CN104879251A - Two-stroke homogeneity compression ignition multi-fuel engine and working method thereof - Google Patents
Two-stroke homogeneity compression ignition multi-fuel engine and working method thereof Download PDFInfo
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- CN104879251A CN104879251A CN201510265045.6A CN201510265045A CN104879251A CN 104879251 A CN104879251 A CN 104879251A CN 201510265045 A CN201510265045 A CN 201510265045A CN 104879251 A CN104879251 A CN 104879251A
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Abstract
The invention discloses a two-stroke homogeneity compression ignition multi-fuel engine and a working method thereof and belongs to the technical field of fuel engines. The engine comprises components including a crank case heating box (6), an electric heating pipe (5), an oil sprayer (3), an engine controller and the like. When the engine is started in a cold start mode, the heating box (6) is heated through the electric heating pipe (5), and then an engine crank case (10) and a fuel oil heating pipe (7) are heated, and then the engine is pre-heated. In the running process of the engine, high-temperature and high-pressure tail gas exhausted by the engine enters the heating box (6) to be heated, so that the temperatures of a crank case and fuel oil are raised to enable the mixed gases to be heated and fully pre-mixed. The mixed gases in a combustion chamber reach the auto-ignition temperature when the mixed gases approach to a top dead center, and then simultaneous ignition happens in the whole combustion chamber. The HCCI combustion process is a non-diffused uniform combustion process happening in the whole combustion chamber simultaneously, the flame propagation distance is short, the combustion duration is short, and the heat efficiency of the engine is high.
Description
Technical field
The present invention relates to one and improve two-stroke piston engine mixed gas formation quality, change engine combustion mode, improve multifuel engine and the method for work thereof of engine thermal efficiency.
Background technique
Traditional Spark ignition type petrol engine or compression ignition diesel engine combustion manner all belong to diffusive combustion, and combustion duration is long, and the thermal efficiency is low, and flame front temperature is high, easily generate the harmful gases such as NOx.Homogeneous compression-ignition (HCCI) combustion process is a kind of non-diffusing, and simultaneous homogenous combustion process in whole firing chamber, does not exist flame front and localized hyperthermia, substantially can eliminate generation and the discharge of the harmful gases such as NOx.Owing to no longer lighting the restriction with flame propagation by mixed gas, air fuel ratio can reduce greatly, thus reduces maximum gas temperature, avoids generation and the discharge of the harmful gases such as NOx.
The two-stroke piston engine mixed gas generation type that mixed gas outside is formed is: form degree of vacuum in crankcase during piston stroking upward, sucks in crankcase, form fuel-air mixture by fuel oil and fresh air.Now tiny in crankcase fuel particles easily condenses into droplet and is even attached on crankcase wall, and this will directly affect the quality entering cylinder interior mixed gas, thus reduces the performance of motor.This phenomenon is even more serious at low ambient temperatures or when using the astatki of atomization difference.Suitable raising crankcase temperature will be conducive to improving combustion oil atomization, improve the quality entering the mixed gas of cylinder interior, improve the performance of motor.
Therefore, need a kind of two-stroke piston engine crankcase heating equipment that abundant for mixed gas premix also can be heated, make motor can realize homogeneous compression-ignition (HCCI) and can pluralities of fuel be used.
Summary of the invention
The object of the invention is design and abundant for mixed gas premix can heat by development one, realize homogeneous compression-ignition (HCCI) and two-stroke homogeneous compression-ignition multifuel engine and the method for work thereof of pluralities of fuel can be used.
A kind of two-stroke homogeneous compression-ignition multifuel engine, comprises crankcase body, firing chamber, Carburetor or oil nozzle; It is characterized in that: also comprise gas exhaust manifold, heating box, electric heating tube, fuel Heating pipe; Wherein heating box and engine crankcase wall are fitted, and are connected with engine exhaust port by described gas exhaust manifold; Electric heating tube is embedded in heating box inside, is connected with external power supply by power lead; Fuel Heating pipe is embedded in heating box inside, and fuel Heating tube inlet is connected with fuel pump outlet, and the outlet of fuel Heating pipe is connected with Carburetor or oil nozzle entrance.
The method of work of described two-stroke homogeneous compression-ignition multifuel engine, it is characterized in that: during engine cold-start, utilize external power supply to power to the electric heating tube of heating box inside, heating box is heated, by the heat transfer between heating box and engine crankcase wall by engine warming up; In engine operation process, the High Temperature High Pressure tail gas that motor is discharged enters heating box heat exchange cavity by outlet pipe, and carries out with it convection heat exchange and be heated; Increased the quality of crankcase temperature and improving engine mixed gas by convection heat exchange by the heating box of tail gas heating; Fuel oil flows through fuel Heating Guan Shihui and is heated, thus the low fogging performance of fuel oil viscosity drop improves; After mixed gas enters crankcase, heating temperature raises, and fuel oil and air mix more even.
Entered behind firing chamber by the mixed gas heated through suction tude in crankcase, reach spontaneous ignition temperature near top dead center, the homogeneous mixture in whole firing chamber takes fire and heat release rapidly simultaneously.HCCI combustion process is a kind of non-diffusing, simultaneous homogenous combustion process in whole firing chamber.Flame travel is short, and combustion duration is short, and engine thermal efficiency improves greatly; Due to fuel oil through heating box heating and mixed gas heat through crankcase, so, no matter use the homogeneous charge that gasoline, kerosene or diesel oil can form abundant premix, make engine reliable smooth combustion of fighting.
The invention has the beneficial effects as follows:
(1) the present invention can significantly improve the combustion thermal efficiency of motor, significantly reduces engine consumption;
(2) the present invention can eliminate harmful gas generation and the discharges such as NOx substantially;
(3) the present invention can make engine for combusting pluralities of fuel, increases the adaptability of motor under different service condition;
(4) the present invention can carry out modification in construction for Multiple Type two stroke engine, and applicability is extensive.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and example, the present invention will be further described.
The overall schematic diagram of Fig. 1;
In figure: 1. firing chamber, 2. engine air inlet tube, 3. oil nozzle, 4. fuel tank, 5. electric heating tube, 6. heating box, 7. fuel Heating pipe, 8. fuel pump, 9. external power supply, 10. crankcase body, 11. engine exhaust pipe.
Embodiment
In FIG, to be powered to the electric heating tube 5 being inlaid in heating box 6 inside by external power supply 9 and heating box 6 heated, by engine crankshaft box 10 preheating, the mixed gas entering motor is heated, improve its atomization quality, thus ensure that motor can start smoothly.The High Temperature High Pressure tail gas that in engine operation process, engine exhaust pipe 11 is discharged enters heating box 6 and is heated, and makes it to maintain higher temperature, for crankcase body 10 provides enough heats.Mixed gas is heated after entering crankcase body 10, and temperature raises, and fuel oil and air mixing are more evenly, make mixed gas can reach spontaneous ignition temperature near, burn in whole firing chamber simultaneously.Suitable increase fuel oil temperature can improve the atomization of fuel oil, therefore fuel Heating can be reduced the viscosity of fuel oil before entering oil nozzle 3 at fuel oil, improves the atomization quality of fuel oil.Consider heat source, it is inner that fuel Heating pipe 7 is integrated in heating box 6 by the present invention.Fuel oil flowed through fuel Heating pipeline and is heated before entering oil nozzle 3.
Claims (2)
1. a two-stroke homogeneous compression-ignition multifuel engine, comprises crankcase body (10), firing chamber (1), Carburetor or oil nozzle (3); It is characterized in that:
Also comprise gas exhaust manifold (11), heating box (6), electric heating tube (5), fuel Heating pipe (7);
Wherein heating box (6) and engine crankcase wall are fitted, and are connected with engine exhaust port by described gas exhaust manifold (11); It is inner that electric heating tube (5) is embedded in heating box (6), is connected with external power supply (9) by power lead; It is inner that fuel Heating pipe (7) is embedded in heating box (6), and fuel Heating tube inlet is connected with fuel pump outlet, and the outlet of fuel Heating pipe is connected with Carburetor or oil nozzle (3) entrance.
2. the method for work of two-stroke homogeneous compression-ignition multifuel engine according to claim 1, is characterized in that:
During engine cold-start, utilize external power supply (9) to power to the electric heating tube (5) that heating box (6) is inner, heating box (6) is heated, by the heat transfer between heating box (6) and engine crankcase wall by engine warming up;
In engine operation process, the High Temperature High Pressure tail gas that motor is discharged enters heating box heat exchange cavity (6) by gas exhaust manifold (11), and carries out with it convection heat exchange and be heated; Increased the quality of crankcase temperature and improving engine mixed gas by convection heat exchange by the heating box of tail gas heating (6);
Fuel oil can be heated when flowing through fuel Heating pipe (7), thus fuel oil viscosity reduces the better atomization of acquisition;
After mixed gas enters crankcase, heating temperature raises, and fuel oil and air mix more even.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510265045.6A CN104879251A (en) | 2015-05-22 | 2015-05-22 | Two-stroke homogeneity compression ignition multi-fuel engine and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510265045.6A CN104879251A (en) | 2015-05-22 | 2015-05-22 | Two-stroke homogeneity compression ignition multi-fuel engine and working method thereof |
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| CN104879251A true CN104879251A (en) | 2015-09-02 |
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| CN201510265045.6A Pending CN104879251A (en) | 2015-05-22 | 2015-05-22 | Two-stroke homogeneity compression ignition multi-fuel engine and working method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108506121A (en) * | 2018-06-08 | 2018-09-07 | 生三胜 | A kind of heat energy from waste gas engine fuel atomization heating device and atomization system |
| CN110219729A (en) * | 2019-05-30 | 2019-09-10 | 张宏杰 | A kind of two-stroke homogeneity compression-ignition engine and burning tissues method |
| CN111664037A (en) * | 2020-06-24 | 2020-09-15 | 北京高鑫伟业科技有限公司 | Preheating system and preheating method for engine crankcase |
-
2015
- 2015-05-22 CN CN201510265045.6A patent/CN104879251A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108506121A (en) * | 2018-06-08 | 2018-09-07 | 生三胜 | A kind of heat energy from waste gas engine fuel atomization heating device and atomization system |
| CN110219729A (en) * | 2019-05-30 | 2019-09-10 | 张宏杰 | A kind of two-stroke homogeneity compression-ignition engine and burning tissues method |
| CN111664037A (en) * | 2020-06-24 | 2020-09-15 | 北京高鑫伟业科技有限公司 | Preheating system and preheating method for engine crankcase |
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Application publication date: 20150902 |