CN101769200A - Petrol engine with superhigh compression ratio of 20:1 - Google Patents
Petrol engine with superhigh compression ratio of 20:1 Download PDFInfo
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- CN101769200A CN101769200A CN200810243206A CN200810243206A CN101769200A CN 101769200 A CN101769200 A CN 101769200A CN 200810243206 A CN200810243206 A CN 200810243206A CN 200810243206 A CN200810243206 A CN 200810243206A CN 101769200 A CN101769200 A CN 101769200A
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Abstract
The compression ratio is a symbolic index for measuring the heat efficiency of an internal combustion engine; due to inherent defects, the compression ratio of the common petrol engine is mostly below 10:1, the compression ratio of the most advanced cylinder direct injection petrol engine just reaches 11:1, and the compression ratio of a diesel engine which is famous for high efficiency just reaches 18:1 commonly. The design scheme realizes the compression ratio of 20:1 of the petrol engine by the other path, introduces a backlash return process of negative pressure closed expansion and negative pressure compression and doubles the working stroke distance with less cost (overcoming frictional resistance), thereby greatly improving the efficiency. Because the practical compression ratio of a gas is still 10:1, no damage is brought to the normal operation of a machine. The petrol engine with a compression ratio of 20:1 still retains the advantages of less vibration, light weight, and the like of the petrol engine when the heat efficiency reaches or exceeds the level of the traditional diesel engine, and has popularization value.
Description
The technical field internal-combustion engine, petrol engine
Background technique gasoline in-cylinder direct injection FSI technology; Continuous variable valve timing CVVT technology
Summary of the invention
Compression ratio is a significant index of weighing internal combustion engine thermal efficiency, because intrinsic defective, general petrol engine compression ratio is mostly below 10: 1, state-of-the-art in-cylinder direct injection petrol engine compression ratio also only reaches 11: 1, with the diesel engine that high efficiency is celebrated, compression ratio generally also can only reach 18: 1.Present design has realized 20: 1 compression ratio of petrol engine by looking for another way, make petrol engine still keep petrol engine when the realization thermal efficiency meets or exceeds the level of existing diesel and vibrate advantages such as little, in light weight.Concrete conceptual design is as follows
One, design proposal petrol engine running stroke
1, suction stroke
Compare with the regular gasoline machine, the present design suction stroke is divided two stages, and this also is the key that realizes 20: 1 compression ratio technology of gasoline engine.
Original state, establishing cylinder volume is 1, intake valve is opened, exhaust valve closing, descent of piston, suction stroke begins.Intake valve, exhaust valve Close All when descent of piston arrives the cylinder stage casing, this moment, air inflow was 9, cylinder volume reaches 10.The suction stroke phase I finishes.
The suction stroke second stage, intake valve, exhaust valve Close All present negative pressure state in the cylinder, and piston continues descending until reaching lower dead center, and suction stroke finishes.
When suction stroke finished, the cylinder internal volume reached 20, and actual gettering quantity but has only 9, and actual tolerance has only 10, and in-cylinder pressure is about 1/2 barometric pressure, and this is basic reason and core technology that petrol engine is realized 20: 1 compression ratio
2, compression stroke
Intake valve, exhaust valve continue to keep closing, and piston runs to top dead center from lower dead center.Compression stroke finishes.
The cylinder inner volume reverted to 1 when compression finished, and pressure is about 10 barometric pressure, temperature 600～700K, and this and common 10: 1 compression ratio petrol engine are identical.Therefore can not cause that gasoline burns in advance because of compression ratio is excessive causes running chaotic.
3, working stroke
Intake valve, exhaust valve continue to keep closing, plug ignition, and working stroke begins, and high-temperature high-pressure fuel gas promotes descent of piston until lower dead center.
In the acting process, gaseous-pressure, temperature sharply rise, and instantaneous pressure can reach 3MPa～5MPa, and transient temperature can reach 2200K～2800K.Along with moving down of piston, pressure, temperature descend, working stroke at the end, pressure is about 200kPa, temperature is about 700K～800K, the combustion gas volume also is expanded to 20 by 1.
4, exhaust stroke
At working stroke at the end, exhaust valve is opened, and piston is moved to top dead center by lower dead center under the drive of bent axle.Waste gas is discharged cylinder from exhaust valve under the residual pressure and the effect of driveing of piston of self, during to piston motion to top dead center, and exhaust valve closing, exhaust stroke finishes.
When exhaust stroke finished, the gas in the jar volume reverted to 1, and pressure is about 105Kpa, and temperature is 500～600K, and system makes zero, and prepared to enter next circulation.
Two, 20: 1 compression ratio petrol engine pluses and minuses
Present design has outstanding pluses and minuses, and is specific as follows
(1) advantage
1, high efficiency.Compare common 10: 1 compression ratio petrol engines of same displacement, in same running stroke, initialization system has been supplied with the fuel oil with amount, and both acting amount contrasts are as follows:
Setting the combustion gas maximum pressure is 40 barometric pressure, and pressure was 4 barometric pressure when compression ratio petrol engine working stroke finished in common 10: 1, and 20: 1 compression ratio petrol engines are 2 barometric pressure, simple computation result:
Compression ratio petrol engine acting amount was in common 10: 1: 22 units;
Compression ratio petrol engine acting amount was in 20: 1: 42 units;
Certainly, it can not be straight line that inner cylinder pressure changes, prior art also can not be simulated fully, compression ratio petrol engine total travel circulation in 20: 1 also has than common 10: 1 extra energy consumptions of compression ratio petrol engine of same displacement, therefore system effectiveness can not have above near 100% raising, but it is still safe fully to improve 50% the thermal efficiency, and the thermal efficiency that is about to petrol engine is brought up to more than 45% by present about 30%, meets or exceeds the diesel engine thermal efficiency.
2, the submissive noise of engine operation is little.In the work cycle of identical fuel delivery, more common 10: 1 compression ratio petrol engines of 20: 1 compression ratio petrol engines working pressure curve is more mild, and the endurance increases near one times, thereby more continual and steady power is provided.Moment when opening owing to exhaust valve in addition, compression ratio petrol engine exhaust gas pressure was about 2 barometric pressure in 20: 1, and compression ratio petrol engine exhaust gas pressure was about 4 barometric pressure in common 10: 1, so its noise is lower.
3, compatibility.The compression ratio petrol engine did not conflict with current state-of-the-art petrol engine in-cylinder direct injection technology, CVVT technology in 20: 1, and is opposite, can also provide more stable systematic environment for introducing these technology.
(2) shortcoming
Compression ratio petrol engine shortcoming also was conspicuous in 20: 1.By running stroke diagram as can be known, 20: 1 compression ratio petrol engines of 1 liter capacity and 10: 1 compression ratio regular gasoline size of engine of 2 liter capacities are identical, and cost is close, and this also is the intrinsic shortcoming of this technology.
Three, realize 20: 1 compression ratio theoretical foundation of petrol engine
By 20: 1 compression ratio petrol engine running stroke as can be known: present design has been introduced the exhumation process of " negative pressure hold one's breath expansion～negative pressure compress " of a backlash, realized the double of working stroke distance with less cost (overcoming surface friction drag), thereby efficient improves greatly.Because the actual compression ratio of gas still is 10: 1, so can not bring any harm to the normal operation of machine.
Embodiment
It is original 1/2 only need dwindling the cylinder chamber volume to existing 10: 1 compression ratio petrol engine, changes its inlet valve cam, and intake valve is closed for existing 1/2 o'clock in advance in air inflow, can transform 10: 1 compression ratio petrol engine as 20: 1 compression ratio petrol engine.But its discharge capacity is little half.20: 1 compression ratio petrol engine are not that old name for the Arabian countries in the Middle East is talked night.If present technique is succeeded in developing, will produce the most advanced world petrol engine, will play revolutionary impetus to revitalizing China's automobile industry.
Claims (1)
1. present design has realized 20: 1 compression ratio of petrol engine by looking for another way: the exhumation process of having introduced " negative pressure hold one's breath expansion～negative pressure compression " of a backlash, realized the double of working stroke distance with less cost (overcoming surface friction drag), thereby efficient improves greatly.Because the actual compression ratio of gas still is 10: 1, so can not bring any harm to the normal operation of machine.20: 1 compression ratio petrol engine have still kept petrol engine and have vibrated advantages such as little, in light weight when realizing that the thermal efficiency meets or exceeds the level of existing diesel, have promotional value.
Need protection domain to have:
The idle exhumation process of " negative pressure hold one's breath expansion～negative pressure compress " of the backlash that 20: 1 compression ratio petrol engine are introduced and the series technique of realizing 20: 1 compression ratios of petrol engine in view of the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810243206A CN101769200A (en) | 2008-12-31 | 2008-12-31 | Petrol engine with superhigh compression ratio of 20:1 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810243206A CN101769200A (en) | 2008-12-31 | 2008-12-31 | Petrol engine with superhigh compression ratio of 20:1 |
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| Publication Number | Publication Date |
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| CN101769200A true CN101769200A (en) | 2010-07-07 |
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| CN200810243206A Pending CN101769200A (en) | 2008-12-31 | 2008-12-31 | Petrol engine with superhigh compression ratio of 20:1 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2505809A1 (en) * | 2011-03-29 | 2012-10-03 | Weigel, Doris | Combustion engine with high compression ratio and method for its operation |
| CN104685186A (en) * | 2012-07-06 | 2015-06-03 | 奥托·M·威尔顿斯坦纳 | Long power stroke engine |
| RU2689486C2 (en) * | 2014-11-01 | 2019-05-28 | Филип КРИСТАНИ | Four-stroke internal combustion engine with shortened intake process |
-
2008
- 2008-12-31 CN CN200810243206A patent/CN101769200A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2505809A1 (en) * | 2011-03-29 | 2012-10-03 | Weigel, Doris | Combustion engine with high compression ratio and method for its operation |
| DE202012012891U1 (en) | 2011-03-29 | 2014-02-20 | Doris Weigel | Internal combustion engine with high compression ratio and kit for retrofitting an Otto four-stroke engine |
| CN104685186A (en) * | 2012-07-06 | 2015-06-03 | 奥托·M·威尔顿斯坦纳 | Long power stroke engine |
| EP2870338A4 (en) * | 2012-07-06 | 2016-03-02 | Otto M Wildensteiner | Long power stroke engine |
| RU2689486C2 (en) * | 2014-11-01 | 2019-05-28 | Филип КРИСТАНИ | Four-stroke internal combustion engine with shortened intake process |
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Open date: 20100707 |