CN101487416B - High compression ratio spark-ignition type engine - Google Patents
High compression ratio spark-ignition type engine Download PDFInfo
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- CN101487416B CN101487416B CN2009100737680A CN200910073768A CN101487416B CN 101487416 B CN101487416 B CN 101487416B CN 2009100737680 A CN2009100737680 A CN 2009100737680A CN 200910073768 A CN200910073768 A CN 200910073768A CN 101487416 B CN101487416 B CN 101487416B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
A high compression ratio spark-ignition engine includes an inlet manifold, an exhaust manifold and an air inlet throttle valve. An EGR valve and an EGR cooler are connected at the lower sequence of the exhaust manifold in sequence; the high compression ratio spark-ignition engine is characterized in that a venturi pipe is connected at the back end of the air inlet throttle valve, and an exhaust end of the venturi pipe is connected with the exhaust manifold of the engine. A metering hole is arranged in the middle of the venturi pipe and the exhaust end of the EGR cooler is connected with the metering hole. The high compression ratio spark-ignition engine mixes proportional waste gas with fresh air in the venturi pipe through the EGR valve and the EGR cooler, and then the mixed gas is absorbed by the engine so as to largely restrain phenomenon of detonation. By using methanol or gas fuel, the compression ratio can be improved to 15 and even more. The air inflow can be automatically adjusted by the throttle valve so as to prevent gas mixture from firing due to being over-thin under medium and small loads. The waste gas can be accelerated by a waste gas turbine to keep smooth exhaust. A turbine gas compressor for auxiliary intake is additionally installed, thus improving intake pressure and guaranteeing the supply of oxygen of the engine.
Description
Technical field
The present invention relates to a kind of spark ignition engine, particularly adopting methyl alcohol or natural gas is the high compression engine of fuel.
Background technique
Spark ignition engine uses homogeneous charge spark ignition combustion manner, the spraying mixing and compressed ignition combustion manner of relative diesel engine, advantage with low noise low emission, but owing to be subjected to the restriction of limit of detonability, its compression ratio is generally lower, even use methyl alcohol or this class antiknock gasoline of rock gas, compression ratio can not surpass 13, HL-495 methanol engine in the market for example, because compression ratio is low, the fuel economy of motor is than the low 15-20% of diesel engine.
Chinese patent 200610139512.1 disclosed " chamber structure of spark ignition engines "; Chinese patent 03242640.2 disclosed " a kind of high compression ratio Spark ignition type flexible fuel engine " and Chinese patent 200410021432.7 disclosed " a kind of spark-ignition engine preheating type combustion system " all are to improve compression ratio by changing engine combustion chamber structure or fuel injection manner.
Summary of the invention
The objective of the invention is to design a kind of novel high compression ratio spark-ignition type engine that is applicable to methanol fuel, its compression ratio will reach more than 15, but phenomenon of detonation can not occur, thereby reaches i.e. cleaning, purpose of energy saving again.
A kind of high compression ratio spark-ignition type engine that is applicable to methanol fuel of the present invention, comprise the intake manifold, engine cylinder-body, exhaust manifold and air inlet shutter, be connected to a Venturi tube in the rear end of air inlet shutter, the exhaust end of Venturi tube links to each other with engine intake manifold, the downstream of exhaust manifold be linked in sequence EGR valve and cooler for recycled exhaust gas, a gaging hole is arranged at the middle part of Venturi tube, the exhaust end of cooler for recycled exhaust gas links to each other with gaging hole, the tail end of exhaust manifold is connected to a waste gas worm gear that is and connects state with the EGR valve, inlet end at air inlet shutter links to each other with a worm gear gas compressor by air intake intercooler, described worm gear gas compressor is coaxial with the waste gas worm gear, and provide driving force to the worm gear gas compressor by the waste gas worm gear, it is characterized in that being connected to moisture trap between cooler for recycled exhaust gas and the gaging hole, be connected to discharging valve on moisture trap, described engine cylinder-body one side is provided with detonation sensor.
The high compression ratio spark-ignition type engine that is applicable to methanol fuel of the present invention, in the course of the work, a certain proportion of waste gas is mixed with fresh air and the suction of launched machine in Venturi tube inside through EGR valve and cooler for recycled exhaust gas, suppressed the generation of phenomenon of detonation greatly, therefore, if use methyl alcohol or gas fuel, its compression ratio can be brought up to more than 15 even 15.Because the effect of closure, make that the air inflow that can regulate air automatically prevented to catch fire because of mixed gas is rare excessively when motor was in medium and small load.Adopt the waste gas worm gear can quicken toxic emission, kept exhaust smooth and easy.Install the worm gear gas compressor of additional-air inlet additional, improved suction pressure, guaranteed the motor oxygen-supplying amount.
Description of drawings
Fig. 1 is the high compression ratio spark-ignition type engine structure diagram
1-common air chamber 2-cylinder body 3-exhaust manifold 4-EGR valve 5-waste gas worm gear 6-worm gear gas compressor 7-EGR cooler 8-air intake intercooler 9-air inlet shutter 10-Venturi tube gaging hole 11-Venturi tube 12-detonation sensor 13-moisture trap among the figure
Embodiment
Below in conjunction with accompanying drawing the present invention is described in detail.
With reference to accompanying drawing, the high compression ratio spark-ignition type engine of methanol fuel that is applicable to of the present invention comprises cylinder body 2, intake manifold 1 and exhaust manifold 3, and the end of described exhaust manifold 3 links to each other with EGR valve 4 with a waste gas worm gear 5.Front end intake manifold 1 connects Venturi tube 11, and the front end of Venturi tube 11 then links to each other with air inlet shutter 9, and worm gear gas compressor 6 links to each other with air inlet shutter 9 by air intake intercooler 8.At the middle part of Venturi tube 11 gaging hole that is communicated with tube chamber 10 is arranged, EGR valve 4 is connected on the gaging hole 10 by cooler for recycled exhaust gas 7.Owing to contain a large amount of moisture in the tail gas of methyl alcohol burning back, waste gas by the EGR valve is after cooler 7 coolings, water vapor is condensed into water and is present in the gas handling system, engine mildness when influencing air inflow and big load, and the long-term existence of this moisture can cause corrosion to part, between cooler for recycled exhaust gas and Venturi tube, be provided with first moisture trap 13 for this reason, by discharging valve the water in the moisture separator bled off after every day, engine operation finished.
The effect of above-mentioned Venturi tube 11 is to utilize aerodynamic principle, produces certain degree of vacuum at the gaging hole place, impels waste gas to suck smoothly.The effect of closure is when motor is in medium and small load condition, regulates the air inflow of air, prevents from that mixed gas is rare excessively to catch fire.
During work, engine exhaust is divided into two-part by exhaust manifold 3, and a part is discharged by waste gas worm gear 5, and drives 6 work of coaxial worm gear gas compressor in exhaust.Another part waste gas then mixes with intraluminal incoming mixture after in intake manifold's 1 suction engine cylinder-body 2 through the tube chamber that EGR valve 4, cooler for recycled exhaust gas 7 and Venturi tube gaging hole 10 enter Venturi tube 10.Above-mentioned fresh air at first passes through 6 superchargings of worm gear gas compressor, enter charge air cooler 8 cooling after, enter Venturi tube 11 by air inlet shutter 9.When motor is in medium and small load, by the aperture of speed governing closure, can adjust air imbibed quantity, the concentration that makes mixed gas is in setting range.By adjusting the aperture of EGR valve 4, can adjust EGR and lead, realization can be controlled the purpose that pinking can take into account fuel economy again.
The aperture of the aperture of above-mentioned EGR valve 4 and air inlet shutter 9 can be controlled mechanically, also can adopt automatically controlled mode to control, and all has ripe prior art to select, and does not limit herein.
In order further to realize monitoring,, a detonation sensor 12 is installed, in order to the detonation signal of real-time monitoring motor in a side of motor to phenomenon of detonation.
Abovementioned technology can be used for methanol-fueled engine or natural gas fueled engines.
If the employing naturally aspirated engine is then cancelled waste gas worm gear 5 and worm gear gas compressor 6.
Claims (1)
1. high compression ratio spark-ignition type engine that is applicable to methanol fuel, comprise intake manifold (1), engine cylinder-body (2), exhaust manifold (3) and air inlet shutter (9), be connected to a Venturi tube (11) in the rear end of air inlet shutter (9), the exhaust end of Venturi tube (11) links to each other with engine intake manifold (1), the downstream of exhaust manifold (3) be linked in sequence EGR valve (4) and cooler for recycled exhaust gas (7), at the middle part of Venturi tube (11) gaging hole (10) is arranged, the exhaust end of cooler for recycled exhaust gas (7) links to each other with gaging hole (10), the tail end of exhaust manifold (3) is connected to a waste gas worm gear (5) that is and connects state with EGR valve (4), inlet end at air inlet shutter (9) links to each other with a worm gear gas compressor (6) by air intake intercooler (8), described worm gear gas compressor (6) is coaxial with waste gas worm gear (5), and provide driving force to worm gear gas compressor (6) by waste gas worm gear (5), it is characterized in that being connected to moisture trap (13) between cooler for recycled exhaust gas (7) and the gaging hole (10), be connected to discharging valve on moisture trap, described engine cylinder-body (2) one sides are provided with detonation sensor (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100737680A CN101487416B (en) | 2009-02-11 | 2009-02-11 | High compression ratio spark-ignition type engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100737680A CN101487416B (en) | 2009-02-11 | 2009-02-11 | High compression ratio spark-ignition type engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101487416A CN101487416A (en) | 2009-07-22 |
| CN101487416B true CN101487416B (en) | 2011-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100737680A Active CN101487416B (en) | 2009-02-11 | 2009-02-11 | High compression ratio spark-ignition type engine |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937043B (en) * | 2012-12-06 | 2015-09-30 | 西华大学 | A kind of EGR water filtering tank and Water straining type gas recirculation system |
| CN103758630B (en) * | 2014-01-03 | 2016-02-24 | 清华大学 | The combustion system of natural gas engine and natural gas engine |
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2009
- 2009-02-11 CN CN2009100737680A patent/CN101487416B/en active Active
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| CN101487416A (en) | 2009-07-22 |
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Address after: The new 045300 West Street in Shanxi County of Xiyang Province East International Trade Building or Cetra Building Patentee after: Jiaxin Energy Sources Chemical Industry Co., Ltd., Shanxi Address before: Yuci District of Shanxi city in Jinzhong province 030600 Street shop No. 61 Patentee before: Jiaxin Energy Sources Chemical Industry Co., Ltd., Shanxi |
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