CN101498246B - Pressure reducing air inlet high compression ratio internal-combustion engines - Google Patents
Pressure reducing air inlet high compression ratio internal-combustion engines Download PDFInfo
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- CN101498246B CN101498246B CN2009101186990A CN200910118699A CN101498246B CN 101498246 B CN101498246 B CN 101498246B CN 2009101186990 A CN2009101186990 A CN 2009101186990A CN 200910118699 A CN200910118699 A CN 200910118699A CN 101498246 B CN101498246 B CN 101498246B
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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
Abstract
The invention relates to a four-stroke gasoline engine, in particular to a decompressed gas-intake internal combustion engine with high compression ratio, belonging to an engine. The decompressed gas-intake internal combustion engine with high compression ratio comprises an oil spout system, a spark plug, an gas cylinder, a piston, a piston pin, a connecting bar, a crank, an oil bottom shell, an intake pipe, an intake valve, an exhaust valve, an exhaust pipe and a crank case and also comprises a gas-intake decompressed valve, a valve drive of the gas-intake decompressed valve, an air pressuresensor and a flow sensor which are all arranged on the upper part of a motion valve and an extract opening of the crank case along a gas-intake direction to be used for restricting gas-intake quantity; the decompressed gas-intake internal combustion engine is improved in compression ratio and can not generate abnormal combustion such as deflagration, surface ignition, and the like. In addition, the decompressed gas-intake internal combustion engine with high compression ratio saves a water cooling system for a prior internal combustion engine. The invention reduces the exhaust emission, savesthe energy, and also simplifies the structure of an internal combustion engine, decreases the part number and lowers the production cost on the basis of enhancing the heat efficiency of the internal combustion engine.
Description
Technical field
The present invention relates to a kind of petrol engine, especially the four-journey petrol engine.
Background technique
At present, existing internal-combustion engine especially petrol engine adopts the normal pressure air inlet mostly, and promptly suction pressure is a barometric pressure.Some internal-combustion engine adopts super charge, and the purpose of super charge is in order to improve power per liter, the amount of promptly doing work with the method raising per unit volume of the many actings of many oil-feeds gas.But the petrol engine thermal efficiency of normal pressure air inlet and super charge is generally lower; Mean level is merely 28～35%, and delivery temperature is up to 900～1200K, and a big chunk energy of fuel combustion is all gone out as heat discharge; There is 1/3rd energy then to conduct to the cooling system of internal-combustion engine in addition via chamber wall; And then be discharged in the air, can not effectively do work, be actually a kind of waste of the energy.And because delivery temperature is high, the outlet pipe of petrol engine generally all adopts heavy cast-iron pipe, and heavy heat transmission gas device also will be installed, and has increased load for the vehicle that this petrol engine is installed.This has just further increased the consumption of fuel oil.
The compression ratio of petrol engine is generally 8～10, and general compression ratio is big more, and just high more at the pressure and temperature that compresses mixed gas at the end, velocity of combustion is also faster, thereby the power that motor sends is bigger, and the thermal efficiency is high more, and Economy better.But under the condition of normal pressure air inlet and super charge, when compression ratio is excessive, not only can not further improve combustion case, malcombustion phenomenons such as deflagration and surface ignition can occur on the contrary.Deflagration be since in the compression process mixture pressure and temperature too high, the terminal inflammable mixture spontaneous combustion of distant place and a kind of malcombustion of causing in the firing chamber from the center of lighting.Can send sharp-pointed engine knock sound during deflagration.Simultaneously, also can cause engine overheat, power descends, a series of adverse consequencess such as fuel consumption increase.Serious deflagration be in addition can cause valve to burn, bearing shell breaks, spark plug insulator is breakdown etc., and parts damage phenomenon.How can improve the thermal efficiency of petrol engine, can avoid malcombustion phenomenons such as detonation and surface ignition to become a technical problem that needs to be resolved hurrily again.
Existing petrol engine is as shown in Figure 1, and critical piece comprises injection system 1, spark plug 2, cylinder 3, piston 4, wrist pin 5, connecting rod 6, bent axle 7, oil sump 8, intake manifold 9, outlet pipe 13, crankcase 14, water interlayer 15 and water pump 33.Intake manifold 9 is provided with closure 10 (being throttle), and intake manifold 9 is provided with intake valve 11 with cylinder 3 joints, and outlet pipe 13 is provided with exhaust valve 12 with cylinder 3 joints.There is cylinder head 301 on cylinder 3 tops, have been provided with the water interlayer 302 of cooling effect in the cylinder block 303 with cylinder head 301, and cylinder head 301 tops also have food tray 18.Be provided with the water interlayer 15 that adopts water-cooling pattern around the cylinder 3, water interlayer 15 relies on water pump 33 to carry out the cooling water circulation.Being arranged on oil pumps in the cylinder block 303 injects machine oil in the internal-combustion engine oil duct through food tray 18 and is lubricated; Machine oil above cylinder head 301; Flow down from camshaft, machine oil flows directly to oil sump 8 by the hole of the orifice flow on the cylinder head 301 on cylinder block 303.Intake manifold 9 has exhaust gas recirculation passage 25 to communicate with outlet pipe 13.Intake manifold 9 communicates with the crankcase 14 of bottom near the part of intake valve 11, and the connection of intake manifold 9 and crankcase 14 is that the existing machinery structure is communicated with, and does not have ad hoc passage, conveniently expresses crankcase bleed-off passage 16 separately in order to represent among Fig. 1.At present on the automobile ECU 24 is arranged mostly, i.e. ECU, it is connected with injection system 1 through signaling line 26, controls fuel injection quantity.
Summary of the invention
The object of the present invention is to provide a kind of pressure reducing air inlet high compression ratio petrol engine, this petrol engine adopts the method for pressure reducing air inlet, improves the expansion ratio of cylinder, improves the thermal efficiency, reduces delivery temperature.
The present invention is achieved in that a kind of pressure reducing air inlet high compression ratio petrol engine; Comprise injection system, spark plug, cylinder, piston, wrist pin, connecting rod, bent axle, oil sump, intake manifold, closure, intake valve, exhaust valve, outlet pipe, crankcase, water interlayer and water pump; The cylinder top is provided with cylinder head; Cylinder head is provided with food tray; Be provided with water interlayer with cylinder head in the cylinder block, this petrol engine also comprises an air inlet reduction valve and valve driver and two sensors, and said air inlet reduction valve is arranged on the intake manifold; Be positioned at the upstream position of closure on the airintake direction, and the position of air inlet reduction valve between crankcase bleed-off passage and exhaust gas recirculation passage; Valve driver is arranged on the position of intake manifold outside near the air inlet reduction valve, and valve driver is connected with the air inlet reduction valve and links to each other through signaling line with the ECU of automobile; Two sensors are arranged on the position between air inlet reduction valve and closure on the intake manifold, and link to each other through signaling line with the ECU of automobile;
The acting in conjunction of ECU on said air inlet reduction valve and valve driver thereof, two sensors and the automobile is reduced to the suction pressure of petrol engine below the normal atmosphere (An), improves compression ratio.
Said two sensors are respectively pressure transducer and flow transducer.
Said petrol engine saves water interlayer and water pump and water pump and water interlayer water pipe connecting.
Said petrol engine saves water interlayer and water pump and water pump and water interlayer water pipe connecting; Cylinder head is provided with oilhole and is communicated with the interior original water interlayer top of cylinder block, and original water interlayer becomes oily interlayer, and oily interlayer bottom is provided with oil outlet and is communicated with crankcase; The oil interlayer position relative with oilhole is provided with the machine oil return flow line and is communicated with crankcase.
The cylinder interior upper surface of said petrol engine, the top of cylinder head lower surface and piston is provided with thermal-protective coating.Thermal-protective coating can be a surface oxide layer, the heat filter of paint coatings, coating or heat-resistant material.
The invention provides a kind of unprecedented petrol engine intake method; Acting in conjunction through the ECU on air inlet reduction valve and valve driver, pressure transducer, flow transducer and the automobile; The suction pressure of petrol engine is reduced to below the normal atmosphere (An), and at the end the density of the inflammable mixture in the cylinder is lower at intake stroke like this, and temperature is lower; In compression stroke subsequently; Though (corresponding compression ratio is higher) mixture temperature can be not too high, can not cause the malcombustion phenomenon.
Air inlet air pressure and compression ratio are inverse correlation, and air inlet air pressure is low more, and the compression ratio of petrol engine just can be done highly more, and when for example air inlet air pressure was 0.8 barometric pressure, compression ratio can be designed near 12.5; When air inlet air pressure was 0.5 barometric pressure, compression ratio can be designed near 20.Compression ratio is high more, and the mechanical efficiency of fuel oil is just high more, and work by combustion final vacuum temperature is just low more.
ECU on the automobile (Electronic Control Unit) is an ECU; It is the computer controller of automobile; Can analyze and handle multiple signal; The signal that the present invention utilizes the ECU on the automobile to spread out of according to pressure transducer and flow transducer through valve driver control valve aperture, reaches the effect of control suction pressure.
The present invention has following beneficial effect: pressure reducing air inlet high compression ratio petrol engine of the present invention can effectively reduce mixed gas initial temperature in the cylinder compresses stroke; Improve compression ratio; On the basis of improving the petrol engine thermal efficiency, avoid malcombustion phenomenons such as detonation and surface ignition.Owing to reduced the heat that is transmitted to chamber wall, removed water cooling system again, alleviated the weight of petrol engine, thereby reduced the cost of production of petrol engine, energy saving has very high economic benefit.In addition, because intake manifold and crankcase and oil sump connection, therefore, crankcase and oil sump are negative pressure with respect to the external world, the leakage of oil situation of locating such as have alleviated at the bottom of crankshaft two end, valve cover, the food tray.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Fig. 1 is existing petrol engine structural representation;
Fig. 2 is pressure reducing air inlet high compression ratio petrol engine first embodiment's schematic representation of the present invention;
Fig. 3 is the intake manifold part enlarged diagram of pressure reducing air inlet high compression ratio petrol engine of the present invention;
Fig. 4 is pressure reducing air inlet high compression ratio petrol engine second embodiment's schematic representation of the present invention;
Among the figure: 1 injection system, 2 spark plugs, 3 cylinders, 301 cylinder head, 302 water interlayers, 303 cylinder blocks, 5 wrist pins; 6 connecting rods, 7 bent axles, 8 oil sumps, 9 intake manifold, 10 closures, 11 intake valves, 12 exhaust valves; 13 outlet pipes, 14 crankcases, 15 water interlayers, 150 oily interlayers, 16 crankcase bleed-off passages, 17 thermal-protective coatings, 18 food trays; 20 air inlet reduction valve, 21 valve drivers, 22 pressure transducers, 23 flow transducers, 24 ECUs, 25 gas recirculation inlet; 26 signaling lines, 33 water pumps, 34 machine oil return flow lines, 35 oilholes, 36 oil outlets, the direction of arrow is airintake direction among the figure.
Embodiment
First embodiment
Referring to Fig. 2, Fig. 3.A kind of pressure reducing air inlet high compression ratio petrol engine; Comprise injection system 1, spark plug 2, cylinder 3, piston 4, wrist pin 5, connecting rod 6, bent axle 7, oil sump 8, intake manifold 9, closure 10, intake valve 11, exhaust valve 12, outlet pipe 13 and crankcase 14; Cylinder 3 tops are provided with cylinder head 301; Cylinder head 301 is provided with food tray 18; Around the cylinder 3 is cylinder block 303, and this petrol engine also comprises an air inlet reduction valve 20 and valve driver 21, pressure transducer 22 and flow transducer 23, and said air inlet reduction valve 20 is arranged on the intake manifold 9; Be positioned at the upstream position of closure 10 on the airintake direction, and the position of air inlet reduction valve 20 between crankcase bleed-off passage 16 and exhaust gas recirculation passage 25; Valve driver 21 is arranged on the position of intake manifold 9 outsides near air inlet reduction valve 20, and valve driver 21 is connected with air inlet reduction valve 20 and links to each other through signaling line with the ECU of automobile 24; Pressure transducer 22 and flow transducer 23 are arranged on the position between air inlet reduction valve 20 and closure 10 on the intake manifold 9, and link to each other through signaling line with the ECU of automobile 24.
During the work of present embodiment petrol engine, first intake stroke valve 20 is closed, and intake valve 11 is opened, and exhaust valve 12 cuts out.Along with piston 4 moves to lower dead center from top dead center, cylinder 3 volumes of piston 4 tops increase, and the pressure in 3 this section spaces drops to below the atmospheric pressure thereby make from air inlet reduction valve 20 to cylinder; This moment pressure transducer 22 detection pressures; Drop to setting value Deng air pressure, ECU 24 control valve drivers 21 are opened air inlet reduction valve 20, let air get into intake manifold 9; Air sucks cylinder 3 through gas reduction valve 20, closure 10 and intake valve 11 successively; The air pressure signal that in breathing process, transmits according to pressure transducer 22, the aperture of ECU 24 control air inlet reduction valve 20 remains suction pressure and maintains certain limit.
Because present embodiment adopts pressure reducing air inlet, compression ratio increases, and the petrol engine expansion stroke cylinder temperature that finishes is lower, can save water interlayer, water pump and related accessories.
Second embodiment
Referring to Fig. 4.A kind of pressure reducing air inlet high compression ratio petrol engine; Comprise injection system 1, spark plug 2, cylinder 3, piston 4, wrist pin 5, connecting rod 6, bent axle 7, oil sump 8, intake manifold 10, intake valve 11, exhaust valve 12, outlet pipe 13 and crankcase 14; Cylinder 3 tops are provided with cylinder head 301; Cylinder head 301 is provided with food tray 18, and this petrol engine also comprises an air inlet reduction valve 20 and valve driver 21, pressure transducer 22 and flow transducer 23.Said air inlet reduction valve 20 is arranged on the intake manifold 9, is positioned at the upstream position of closure 10 on the airintake direction, and the position of air inlet reduction valve 20 between crankcase bleed-off passage 16 and exhaust gas recirculation passage 25; Valve driver 21 is arranged on the position of intake manifold 9 outsides near air inlet reduction valve 20, and valve driver 21 is connected with air inlet reduction valve 20 and links to each other through signaling line 26 with the ECU 24 of automobile; Pressure transducer 22 and flow transducer 23 are arranged on the intake manifold 9 positions between air inlet reduction valve 20 and closure 10, and link to each other through signaling line 26 with the ECU 24 of automobile.Cylinder head 301 is provided with oily interlayer 150 tops in oilhole 35 and the cylinder block 303 and is communicated with that (the oily interlayer 150 of the present invention is exactly original water interlayer; But the heat eliminating medium that originally passes through in the water interlayer is a water; And the heat eliminating medium that passes through in the present invention oil interlayer 150 is oil), machine oil flows to 15 li in oily interlayer in the cylinder block 303 through oilhole 35 on the cylinder head 301.Oil interlayer 15 is provided with machine oil return flow line 34 with oilhole 35 relative positions and is communicated with crankcase 14.Oily interlayer 15 bottoms in the cylinder block 303 have oil outlet 36 to be communicated with crankcase 14; In original petrol engine, machine oil flows directly to oil sump 8 by the hole of the orifice flow on the cylinder head 301 in cylinder block 303; Among the present invention, the hole in the cylinder block 303 is no longer led in the hole on the cylinder head 301, but leads to the oily interlayer 150 in the cylinder block 303; Form oilhole 35; Machine oil through oil-through hole 35, flows to 150 li in oily interlayer in the cylinder block 303 from cylinder head 301, flows to oil sump 8 again.Cylinder 3 inside upper surface of said petrol engine, the top of cylinder head 301 lower surfaces and piston 4 is provided with thermal-protective coating 17.Thermal-protective coating 17 can be commercially available high temperature resistant heat insulation coating coating for directly carrying out the oxide layer that surface oxidation treatment obtains in piston head, can be the alloy layer of low heat conductivity, and the high temperature resistant heat insulation sheet of materials such as pottery also can be installed.
Present embodiment petrol engine working principle is identical with first embodiment.
Because present embodiment adopts pressure reducing air inlet, compression ratio increases, and the petrol engine expansion stroke cylinder temperature that finishes is lower, can directly utilize machine oil to dispel the heat, and saves water pump and related accessories, and the water interlayer on the cylinder head.In addition for fear of the heat radiation excessive influence thermal efficiency, the cylinder interior upper surface of petrol engine, the top of cylinder head lower surface and piston is provided with thermal-protective coating.
Claims (5)
1. pressure reducing air inlet high compression ratio petrol engine; Comprise injection system, spark plug, cylinder, piston, wrist pin, connecting rod, bent axle, oil sump, intake manifold, closure, intake valve, exhaust valve, outlet pipe, crankcase, water interlayer and water pump; The cylinder top is provided with cylinder head; Cylinder head is provided with food tray, is provided with water interlayer with cylinder head in the cylinder block, it is characterized in that; This petrol engine also comprises an air inlet reduction valve and valve driver and two sensors; Said air inlet reduction valve is arranged on the intake manifold, is positioned at the upstream position of closure on the airintake direction, and the position of air inlet reduction valve between crankcase bleed-off passage and exhaust gas recirculation passage; Valve driver is arranged on the position of intake manifold outside near the air inlet reduction valve, and valve driver is connected with the air inlet reduction valve and links to each other through signaling line with the ECU of automobile; Two sensors are arranged on the position between air inlet reduction valve and closure on the intake manifold, and link to each other through signaling line with the ECU of automobile;
The acting in conjunction of ECU on said air inlet reduction valve and valve driver thereof, two sensors and the automobile is reduced to the suction pressure of petrol engine below the normal atmosphere (An), improves compression ratio.
2. pressure reducing air inlet high compression ratio petrol engine as claimed in claim 1 is characterized in that, said two sensors are respectively pressure transducer and flow transducer.
3. according to claim 1 or claim 2 pressure reducing air inlet high compression ratio petrol engine is characterized in that said petrol engine saves water interlayer and water pump and water pump and water interlayer water pipe connecting.
4. according to claim 1 or claim 2 pressure reducing air inlet high compression ratio petrol engine is characterized in that said petrol engine saves water pump and water pump and water interlayer water pipe connecting; Cylinder head is provided with oilhole and is communicated with the interior original water interlayer top of cylinder block, and original water interlayer becomes oily interlayer, and oily interlayer bottom is provided with oil outlet and is communicated with crankcase; The oil interlayer position relative with oilhole is provided with the machine oil return flow line and is communicated with crankcase.
5. pressure reducing air inlet high compression ratio petrol engine as claimed in claim 3 is characterized in that the top of the cylinder interior upper surface of said petrol engine, cylinder head lower surface and piston is provided with thermal-protective coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101186990A CN101498246B (en) | 2009-03-03 | 2009-03-03 | Pressure reducing air inlet high compression ratio internal-combustion engines |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101186990A CN101498246B (en) | 2009-03-03 | 2009-03-03 | Pressure reducing air inlet high compression ratio internal-combustion engines |
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| CN101498246A CN101498246A (en) | 2009-08-05 |
| CN101498246B true CN101498246B (en) | 2012-07-04 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103982331B (en) * | 2014-04-23 | 2016-06-08 | 镇江市博林光电科技有限公司 | Compression knock jet engine |
| CN104481708A (en) * | 2014-11-18 | 2015-04-01 | 中国科学院福建物质结构研究所 | Reciprocating piston engine with large expansion ratio |
| CN105756792A (en) * | 2016-05-05 | 2016-07-13 | 孟书芳 | Novel diesel engine capable of intelligently controlling combustion |
| CN108506122A (en) * | 2018-05-12 | 2018-09-07 | 陈向红 | High compression ratio ignition internal combustion engine and its working method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5722565A (en) * | 1994-02-18 | 1998-03-03 | Tapematic U.S.A., Inc. | Cassette feeding system and method |
| CN2739365Y (en) * | 2004-10-19 | 2005-11-09 | 无锡开普动力有限公司 | Engine decompression device |
| GB2420591A (en) * | 2004-11-26 | 2006-05-31 | Connaught Motor Co Ltd | Assisting start of an internal combustion engine by restricting gas flow through the inlet |
-
2009
- 2009-03-03 CN CN2009101186990A patent/CN101498246B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5722565A (en) * | 1994-02-18 | 1998-03-03 | Tapematic U.S.A., Inc. | Cassette feeding system and method |
| CN2739365Y (en) * | 2004-10-19 | 2005-11-09 | 无锡开普动力有限公司 | Engine decompression device |
| GB2420591A (en) * | 2004-11-26 | 2006-05-31 | Connaught Motor Co Ltd | Assisting start of an internal combustion engine by restricting gas flow through the inlet |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平9-4474A 1997.01.07 |
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