CN101660459A - Cylinder of piston engine - Google Patents
Cylinder of piston engine Download PDFInfo
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- CN101660459A CN101660459A CN200910092476A CN200910092476A CN101660459A CN 101660459 A CN101660459 A CN 101660459A CN 200910092476 A CN200910092476 A CN 200910092476A CN 200910092476 A CN200910092476 A CN 200910092476A CN 101660459 A CN101660459 A CN 101660459A
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- fuel
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- wall
- cylinder
- piston
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Abstract
The invention discloses a cylinder of a piston engine, comprising a cylinder cover, an inner wall and an outer wall, wherein the outer wall is arranged at the periphery of the inner wall; the cylindercover is fixedly connected with the inner wall; the outer wall is provided with a cooling channel the upper end of which is connected with a fuel inlet, and the lower end thereof is connected with afuel outlet; the fuel inlet and the fuel outlet are both arranged on the outer wall; fuel enters the cooling channel from the fuel inlet; after the fuel flows through the cooling channel, the temperature of the fuel is increased, and the temperature of the cylinder is reduced; and the fuel flows out from the fuel outlet. As the cooling channel is arranged on the outer wall of the cylinder, the engine can be effectively cooled by heat exchange, and the utilization rate of the energy is increased by more than 10%. The fuel oil is heated by the cylinder before entering the cylinder, so that the atomization and the gasification performances of the fuel can be improved, and the emission of harmful gases such as carbon monoxide and the like can be reduced; furthermore, the integration between the cylinder and a fuel oil channel effectively reduces the volume and the weight of the piston engine, and leads the minitype piston engine to use high-heating value fuels such as diesel oil and the like to be possible.
Description
Technical field
The present invention relates to a kind of piston-engined cylinder, belong to technical field of engines.
Background technique
In order to improve piston-engined performance, realize bigger power output, reduce oil consumption and improve stability, main method aspect thermomechanics is exactly the compression ratio that improves constantly motor, therefore especially heat load can be more and more heavier for the working load of each parts of motor, for having, the reliable operation that guarantees motor has the long life-span, need adopt an effective measure hot-end component is cooled off, and the coupling of the overall performance of effective cooling of piston engine hot-end component and motor and weight is becoming piston-engined development bottleneck on the large program very much.
Existing cooling structure becomes increasingly complex, but the increase rate of cooling effect is then much slow relatively.With fuel the engine thermal end piece being cooled off is a kind of scheme with broad prospect of application.Adopt heat-absorbing type hydrocarbon fuel such as diesel oil to have very huge advantage as low-temperature receiver, it is heat sink to be divided into two-part, and a part is the physics caloric receptivity, i.e. sensible enthalpy, and another part is the chemistry caloric receptivity that endothermic chemical reaction causes.
Existing cylinder, as shown in Figure 1, comprise cylinder head 1, inwall 2 and outer wall 3, outer wall 3 is arranged on inwall 2 peripheries, and cylinder head 1 is fixedlyed connected with inwall 2, is example with U.S. JP8 military aviation kerosene, this kerosene of 1kg is heated to 800K from normal temperature 298K, caloric receptivity reaches 1600kJ, and heat absorbing property is very remarkable, and it is big that the heat absorbing property of diesel oil is then also wanted.See He Huang, Louis J.Spadaccini, David R.sobel.[2004], Fuel-Cooled ThermalManagement for Advanced Aeroengines.Journal of Engineering for Gas Turbinesand Power, Vlo.126, APRIL 2004.
Summary of the invention
The objective of the invention is to propose a kind of piston-engined cylinder in order to solve existing piston engine cooling structure complexity, the relatively low problem of capacity usage ratio.
A kind of piston-engined cylinder of the present invention, comprise cylinder head, inner and outer wall, outer wall is arranged on the inwall periphery, cylinder head is fixedlyed connected with inwall, between outer wall and inwall, the cooling channel is set, described cooling channel processes outer wall again, the upper end of cooling channel connects fuel inlet, lower end in the cooling channel connects fuel outlet, and described fuel outlet and fuel inlet all are arranged on the outer wall, and fuel enters the cooling channel from fuel inlet, after flowing through the cooling channel, fuel temperature increases, and temperature cylinder reduces, and fuel flows out from fuel outlet.
Described cooling channel is arranged on outer wall wing location of root.
Described cooling channel is shape or ring-type in the shape of a spiral, when the cooling channel is ring-type, will be communicated with between two adjacent rings.
The cross section of described cooling channel is a rectangle.
The rectangular cross-section of described cooling channel is wide to be W, and height is H, and Aspect Ratio W: H is between 0.3～1.
The invention has the advantages that:
(1) the present invention adopts spiral or circular groove to carry out effectively cooled engine of heat exchange at the casing outer wall face, makes capacity usage ratio improve more than 10%;
(2) fuel is heated by cylinder before entering cylinder among the present invention, improve fuel atomizing and gasification performance, thereby shortened with the Air mixing time and improved mixed-level, and the enhancing that mixes helps lend some impetus to igniting and improve combustion efficiency and power output, effectively reduces discharge of harmful gases such as carbon monoxide;
(3) the integrated piston-engined volume and the weight of effectively reducing of cylinder and fuel channel makes the microminiature piston engine use the fuel of higher calorific value such as diesel oil to become possibility.
Description of drawings
Fig. 1 is the structural representation of existing cylinder in the background technique;
Fig. 2 is a cylinder structure schematic representation of the present invention;
Fig. 3 is that structural representation cuts open in the office of cylinder of the present invention;
Fig. 4 is the structure enlarged diagram of A part among Fig. 2.
Among the figure:
4 cooling channels, 5 fuel outlets, 6 fuel inlets of 1-cylinder head 2-inwall 3-outer wall
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
The present invention is a kind of piston-engined cylinder, as shown in Figure 2, comprises cylinder head 1, inwall 2 and outer wall 3, outer wall 3 is arranged on inwall 2 peripheries, cylinder head 1 is fixedlyed connected with inwall 2, between outer wall 3 and inwall 2 cooling channel 4 is set, and 4 processing of described cooling channel are on outer wall 3.Cooling channel 4 is shape or ring-type in the shape of a spiral, when cooling channel 4 is ring-type, to be communicated with between two adjacent rings, as shown in Figure 3,4 upper end connects fuel inlet 6 in the cooling channel, 4 lower end connects fuel outlet 5 in the cooling channel, and described fuel outlet 5 and fuel inlet 6 are not all established the person on outer wall 3, fuel outlet 5 and Carburetor UNICOM.Fuel enters cooling channel 4 from fuel inlet 6, after flowing through cooling channel 4, flow out from fuel outlet 5, enter Carburetor, the cross section of described cooling channel 4 is a rectangle, cooling channel 4 and casing outer wall 3 whole processing, as shown in Figure 4, if the wide of rectangular cross-section is W, height is H, wide and the high ratio of 4 rectangular cross-sections, cooling channel between inwall 2 and the outer wall 3 changes according to the overall performance of motor, and the ratio of sectional dimension W and H is that Aspect Ratio countercylinder and piston-engined whole usability etc. all can produce considerable influence, and the present invention adopts Aspect Ratio between 0.3～1, obtain very effective cooling effect, simultaneously the fuel temperature of the fuel outlet 5 of cooling channel 4 is also very even, when Aspect Ratio greater than 2, cooling effect is not obvious.
Fuel enters from fuel inlet 6,4 flow along the cooling channel, fuel cools off inwall 2, self temperature is improved, come out from fuel outlet 5 then, through entering crankcase after Carburetor and the air mixing again in suction stroke enters cylinder or in the DCI direct cylinder injection, after plug ignition burn or be compressed after high temperature air light, the present invention is applicable to hydrocarbon fuels commonly used such as gasoline, diesel oil.
Fuel is being caused viscosity to reduce gradually along constantly heating in 4 process of flowing of cooling channel, thereby its flowing velocity also constantly increases, and be transformed into strong turbulence gradually from Laminar Flow, the transformation of fuel flowing state can effectively strengthen the cooling effect of cylinder wall, guarantees that cylinder is operated in the temperature range of permission.Piston-engined cylinder of the present invention under the situation of volume that does not change existing cylinder and size, the circulation passage that acts as a fuel in the cooling channel of cylinder cooling fin (outer wall 3) wing location of root processing helical or ring-type only, technology processing is very simple.
The present invention combines the cooling of piston engine cylinder and the raising of capacity usage ratio together, utilize the cooling channel 4 in the cylinder self to come cooling cylinder, the fuel temperature that flows in cooling channel 4 can be improved to some extent simultaneously, the energy that originally entered atmosphere is become the interior energy of fuel self, improved the capacity usage ratio of motor; In addition, the raising of fuel temperature does well out of fuel atomizing and can strengthen and Air mixing, improves the combustion efficiency of fuel in cylinder, increases power output; At last, cylinder and cooling channel 4 integrated will obviously reduce the accessory system (such as existing water cooling system) of motor, alleviates the weight of motor, makes the microminiature piston engine use the fuel of higher calorific value such as diesel oil to become possibility.
Claims (5)
1, a kind of piston-engined cylinder, comprise cylinder head, inner and outer wall, outer wall is arranged on the inwall periphery, cylinder head is fixedlyed connected with inwall, it is characterized in that: between outer wall and inwall, the cooling channel is set, described cooling channel processes outer wall again, the upper end of cooling channel connects fuel inlet, lower end in the cooling channel connects fuel outlet, and described fuel outlet and fuel inlet all are arranged on the outer wall, and fuel enters the cooling channel from fuel inlet, after flowing through the cooling channel, fuel temperature increases, and temperature cylinder reduces, and fuel flows out from fuel outlet.
2, a kind of piston-engined cylinder according to claim 1, it is characterized in that: described cooling channel is arranged on outer wall wing location of root.
3, a kind of piston-engined cylinder according to claim 1, it is characterized in that: described cooling channel is shape or ring-type in the shape of a spiral, when the cooling channel is ring-type, will be communicated with between two adjacent rings.
4, a kind of piston-engined cylinder according to claim 1, it is characterized in that: the cross section of described cooling channel is a rectangle.
5, a kind of piston-engined cylinder according to claim 4 is characterized in that: the rectangular cross-section of described cooling channel is wide to be W, and height is H, Aspect Ratio W: H is between 0.3-1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910092476A CN101660459A (en) | 2009-09-15 | 2009-09-15 | Cylinder of piston engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910092476A CN101660459A (en) | 2009-09-15 | 2009-09-15 | Cylinder of piston engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101660459A true CN101660459A (en) | 2010-03-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910092476A Pending CN101660459A (en) | 2009-09-15 | 2009-09-15 | Cylinder of piston engine |
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| CN (1) | CN101660459A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106077394A (en) * | 2016-07-29 | 2016-11-09 | 宜兴市鑫锤锻压设备有限公司 | A kind of air-cooled compression cylinder of pneumatic hammer |
| CN108691684A (en) * | 2017-03-30 | 2018-10-23 | 大众汽车有限公司 | Cylinder crankcase and internal combustion engine with this cylinder crankcase |
| CN113775408A (en) * | 2020-06-10 | 2021-12-10 | 马思正 | Waste-reducing and energy-saving equipment for internal combustion engine |
-
2009
- 2009-09-15 CN CN200910092476A patent/CN101660459A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106077394A (en) * | 2016-07-29 | 2016-11-09 | 宜兴市鑫锤锻压设备有限公司 | A kind of air-cooled compression cylinder of pneumatic hammer |
| CN108691684A (en) * | 2017-03-30 | 2018-10-23 | 大众汽车有限公司 | Cylinder crankcase and internal combustion engine with this cylinder crankcase |
| CN113775408A (en) * | 2020-06-10 | 2021-12-10 | 马思正 | Waste-reducing and energy-saving equipment for internal combustion engine |
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Application publication date: 20100303 |