CN2374648Y - Energy saving directly spraying diesel engine - Google Patents
Energy saving directly spraying diesel engine Download PDFInfo
- Publication number
- CN2374648Y CN2374648Y CN 99220285 CN99220285U CN2374648Y CN 2374648 Y CN2374648 Y CN 2374648Y CN 99220285 CN99220285 CN 99220285 CN 99220285 U CN99220285 U CN 99220285U CN 2374648 Y CN2374648 Y CN 2374648Y
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- diesel engine
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Abstract
The utility model relates to a direct spraying combustion technology on the SD1125 type diesel engine. The SD1125 type diesel engine is provided with maximum single-cylinder diameter and maximum single-cylinder power in domestic at present. An air cylinder cover (4) is provided with a spiral air inlet passage (7) and a porous oil nozzle (8). The top of a piston is provided with an omega combustion chamber (2). The spiral air inlet passage (7) generates the optimal air inlet swirl. The optimal air inlet swirl is mixed and combusted with oil mist sprayed by the porous oil nozzle (8) in the omega combustion chamber to do work. The utility model has the advantages that the heat radiation loss is small, the combustion efficiency is high, the fuel oil consumption is low, and the fuel oil consumption is 13-18% lower than the swirl-chamber 4125G2 type diesel engine; the utility model has no flow loss, the low-temperature staring performance is good, and the utility model is favorably started in-5 DEG C.
Description
The utility model is to adopt advanced straight spray combustion technology on the SD1125 of present domestic maximum single cylinder diameter and maximum power per cylinder diesel engine, makes it to become energy-saving diesel engine.
Cylinder diameter is the at present domestic also not production of the single cylinder engine of 125mm, former 4125G2 diesel engine adopts the swirl combustion technology, its working procedure is that air is inhaled in the cylinder when descent of piston, when piston stroking upward, sucking air clamp-ons in the vortex chamber on cylinder head, form rotating vortex, mixes with fuel oil that oil nozzle sprays into and carry out the combustion gas of primary combustion formation high pressure-temperature, the main combustion chamber relaying afterflame that sprays into from the vortex chamber again in the cylinder burns down into work done.Its shortcoming is: radiation loss is big, and combustion process is secondary combustion, and restriction loss is big.A little less than the hand starting extruding swirl, thermal loss is big, and starting difficulty is the fuel consume height, starting difficulty.
It is little that the purpose of this utility model just provides a kind of thermal loss, the energy-saving straight spray SD1125 diesel engine that fuel consume is low.
The utility model is to adopt energy-conservation straight spray combustion technology on the SD1125 diesel engine.Its principle is: when descent of piston, air is through the spiral inlet duct on the cylinder head, form rotating vortex and enter cylinder, perforated plate type atomizer sprays into atomized diesel fuel in the cylinder and the eddy current air mixing, the work done of directly burning in the ω firing chamber that cylinder head and piston head pit form.Thermal loss is little, no restriction loss.Therefore, fuel consume is low, and starting easily.Be described in detail principle of the present utility model and structure below.
Fig. 1 is the utility model principal section figure; Fig. 2 is the utility model left profile figure; Fig. 3 is the utility model air flue and W firing chamber plan view; Fig. 4 is the utility model spiral inlet duct plan view; Fig. 5 is the utility model spiral inlet duct plan view; Fig. 6 is the utility model suction port schematic representation; Fig. 7 is the utility model ω firing chamber plan view; Fig. 8 is the utility model ω firing chamber plan view.
This machine is single cylinder, four-cycle diesel. Take diesel oil as fuel, adopt advanced straight spray combustion during work Burning technology: namely be provided with spiral inlet duct (7), exhaust duct (3) and porous oil spout in cylinder head (4) Mouth (8) pushes up the ω combustion chamber (2) that is provided with dimple-shaped at piston (1). Former 1125 diesel engines The extruding swirl that is produced by piston stroking upward in the minor air cell changes into by the spirally inlet air on the cylinder head (4) The intake swirl that road (7) produces, cylinder head (4) is provided with spiral inlet duct (7) and exhaust duct (3). And fuel cam improved. When piston (1) is descending, produce negative pressure in the cylinder jacket (9), Because differential pressure action, air, forms in cylinder along A to entering in the cylinder through spiral inlet duct (7) The air inlet rotating vortex. When piston (1) was up, the rotating vortex in the cylinder was compressed, formed high temperature Gases at high pressure. When the close top dead centre of piston (1), perforated plate type atomizer (8) ejection atomized fuel, Interior and the rotating vortex mixed combustion in piston (1) ω combustion chamber, top (2), the descending work of pushing piston (1) Merit. After piston (1) was again up, exhaust valve (5) was opened, burnt gas from C outside being discharged from cylinder, Finish a full operation cycle. Its key problem in technology is that side spiral inlet duct (7) can produce suitable advancing Gas eddy stream, piston (1) top ω combustion chamber (2) shape, size and position. Perforated plate type atomizer (8) The installation site, injection diameter etc., the concrete size of each of following division:
1, spiral inlet duct (7) adopts side spiral inlet duct (seeing Fig. 4, Fig. 5, Fig. 6) through spiral shell
Precession air flue (7) forms suitable intake swirl in breathing process.The air flue parameter:
A, spiral inlet duct (7) inlet-duct area Sg/ air inlet throat area Sh=150～160%
B, spiral inlet duct (7) length L/cylinder bore D are 50～55%
The volute height of c, spiral inlet duct (7) (that is: aditus laryngis is to the distance of joint line) h/ aditus laryngis
Diameter of phi h is 0.7～0.8%
The eccentric e/ cylinder bore of d, suction port center and cylinder diameter D=28～33%
2, the shape of piston head ω firing chamber (2) (seeing Fig. 7, Fig. 8)
A, ω firing chamber (2) throat diameter dk/ cylinder bore D are 0.45～0.6
B, throat diameter dk/ pit depth hk are 2.6～2.8
C, ω firing chamber (2) volume V k=70～80cm
3
D, compression ratio δ=16.5 ± 1
3, perforated plate type atomizer (8), this machine adopts 4 hole oil nozzles, also can adopt 6 hole perforated plate type atomizers, and the spray orifice aperture is 0.32～0.36mm, and established angle is 20 °～25 °, and injection pressure is 19～20MPa.
Therefore the utility model has following advantage owing to adopted direct injection technology:
1, burning is mixed combustion in the firing chamber of cylinder head (4) and piston (1) end face composition, and radiation loss is little, and the fuel oil consumption is low.Than vortex chamber's 1125 diesel engine diesel oil fuel oils consumption low 13～18%.
2, because radiation loss is little, no flow losses, cold starting performance is good, does not add any measure-5 and ℃ can start smoothly.
Claims (4)
1, a kind of single cylinder, four-stroke energy-saving direct-injection diesel engine is characterized in that the cylinder head of this diesel engine is provided with spiral inlet duct (7) and perforated plate type atomizer (8), are provided with the ω firing chamber (2) of dimple-shaped on piston head.
2, according to the said energy-saving direct-injection diesel engine of claim 1, it is characterized in that said spiral inlet duct (7) adopts the side spiral inlet duct, spiral inlet duct (7) inlet-duct area Sg is 150～160% of air inlet throat area Sh, spiral inlet duct (7) length L/cylinder bore D is 50～55%, and the volute height h/ throat diameter Φ h of spiral inlet duct (7) is 0.7～0.8%.
3, according to the said energy-saving direct-injection diesel engine of claim 1, the throat diameter dk/ cylinder bore D that it is characterized in that the firing chamber (2) of the dimple-shaped on the said piston head is 0.45～0.60, throat diameter dk/ pit depth hk is 2.6～2.8, and ω firing chamber (2) volume V k is 70～80cm
3
4, according to the said energy-saving direct-injection diesel engine of claim 1, it is characterized in that said perforated plate type atomizer (8), is 4 hole oil nozzles, also available 6 hole perforated plate type atomizers, spray orifice aperture 0.32～0.36mm, established angle are 20 °～25 °, and injection pressure is 19～20MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99220285 CN2374648Y (en) | 1999-03-26 | 1999-03-26 | Energy saving directly spraying diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99220285 CN2374648Y (en) | 1999-03-26 | 1999-03-26 | Energy saving directly spraying diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2374648Y true CN2374648Y (en) | 2000-04-19 |
Family
ID=34011055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99220285 Expired - Fee Related CN2374648Y (en) | 1999-03-26 | 1999-03-26 | Energy saving directly spraying diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2374648Y (en) |
-
1999
- 1999-03-26 CN CN 99220285 patent/CN2374648Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |