CN104612880A - Method for controlling ignition phase of premixed compressed combustion in internal combustion engine through plasma beam jet flow - Google Patents
Method for controlling ignition phase of premixed compressed combustion in internal combustion engine through plasma beam jet flow Download PDFInfo
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- CN104612880A CN104612880A CN201410837691.0A CN201410837691A CN104612880A CN 104612880 A CN104612880 A CN 104612880A CN 201410837691 A CN201410837691 A CN 201410837691A CN 104612880 A CN104612880 A CN 104612880A
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- combustion
- compression
- combustion engine
- ignition
- plasma flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P23/00—Other ignition
- F02P23/04—Other physical ignition means, e.g. using laser rays
Abstract
The invention discloses a method for controlling the ignition phase of premixed compressed combustion in an internal combustion engine through plasma beam jet flow and belongs to the field of combustion in the internal combustion engine. According to the control method, a combustion system does not limit fuel, and an in-cylinder early injection mode or a gas inlet channel injection mode is adopted to form premixed gas; operation is conducted at a low compression ratio and a high expansion ratio, the effective compression ratio of the premixed gas is slightly lower than the minimum compression ratio capable of making the premixed gas compressed and ignited spontaneously, and it is guaranteed that mixed gas will not ignite spontaneously; nearby a top dead center, the jet flow of a plasma flow igniter generates a high-temperature plasma beam flame, a small amount of the mixed gas is ignited in the region where the jet flow passes by, strong pressure waves are generated instantly, a large amount of the unburned mixed gas is quickly compressed for the second time, the temperature and pressure rise sharply, the ignition conditions are satisfied, and then multi-point spontaneous ignition begins; as a result, the ignition phase of premixed compressed combustion in the internal combustion engine is controlled actively, and a diesel engine and a gasoline engine are unified.
Description
Technical field
The present invention relates to a kind of method of Plasma flow controlling combustion engine premixing compression and combustion Ignition Timing, it belongs to combustion in IC engine field.
Background technique
Internal-combustion engine premixing compression and combustion has been proved to be the advanced combustion manner simultaneously realizing good Economy and minimum discharge.And the problems such as premixed gas preparation, Ignition Timing control, rate of burning control hinder the practical of internal-combustion engine premixing compression and combustion, wherein Ignition Timing controls is key problem, solves Ignition Timing and controls to be the prerequisite breaking through load range restriction.Have researcher to propose Ignition Timing that the measures such as fuel design, outside EGR, internal EGR, Variable Valve Time, variable compression ratio carry out controlling combustion engine premixing compression and combustion, achieve certain effect, but all need complex control system, especially high to the requirement of control system during engine operating condition change, reach the object accurately controlling Ignition Timing more difficult.Plasma jet firing technique is greatly improved relative to traditional electrical spark ignition technical performance, ignition energy is large, can realize pole lean combustion, ensures the reliability of low calorie fuels and cold start-up igniting, reduce fuel consumption, started to apply in field of internal combustion engine.
Summary of the invention
In order to reach ACTIVE CONTROL internal-combustion engine premixing compression and combustion Ignition Timing problem, the invention provides a kind of method of Plasma flow controlling combustion engine premixing compression and combustion Ignition Timing, this controlling method combustion system used should adopt low compression ratio, high voltage rise ratio, high expansion ratio thermodynamic cycle.In firing chamber, spray into fuel in compression stroke or intake stroke, or adopt intake port injection, form premixed gas, when low effective compression ratio ensures piston arrives top dead center, mixed gas can not catch fire; At near, through a small amount of premixed gas in region, produce strong pressure wave by jet in Plasma flow flame ignition cylinder, a large amount of unburned mixture of compression ignite, the Ignition Timing of effective controlling combustion engine premixing compression and combustion.Meanwhile, by EGR Technology, control pre-mixing combustion speed, thus reach the target of engine high-efficiency cleaning.
The concrete technological scheme that the present invention adopts: a kind of method of Plasma flow controlling combustion engine premixing compression and combustion Ignition Timing, the combustion system that this controlling method adopts comprises a firing chamber, fuel injector, a jet ignition device, described fuel injector is arranged in firing chamber or intake duct, fuel injector intake stroke or compression stroke in firing chamber or at intake stroke to burner oil in intake duct, form premixed gas; Adopt low compression ratio, high expansion ratio thermodynamic cycle; Before compression top center, the mixed gas of pilot combustion indoor jet in Plasma flow flame area through region produced by jet ignition device, is produced pressure wave compression ignite unburned mixture, forms multiple spot spontaneous combustion district, control Ignition Timing, realize premixing compression and combustion.
Described fuel injector, jet ignition device are installed in firing chamber.
Described fuel injector is installed in intake duct, and jet ignition device is installed in firing chamber.
Described fuel adopts diesel oil, gasoline, gaseous fuel, fuel combination, wide-cut fuel or fuel combination, the fire behaviour adjustment valve timing of based on fuel, makes compression ratio be less than the minimum effective compression ratio of mixed gas compression involuntary ignition.
Described combustion system adopts EGR Technology control combustion speed.
The guiding theory of such scheme is: Ignition Timing controls, and is the key realizing internal-combustion engine premixing compression and combustion.The present invention focuses on the Ignition Timing being controlled homogeneous charge compression ignition by Plasma flow, reaches the object controlling premixing compression and combustion.First by early spraying or intake port injection in cylinder, fuel and air fully being mixed, forms high-quality premixed gas; Secondly control its compression temperature, to ensure in cylinder that mixed gas can not spontaneous combustion, but controlled the Ignition Timing of premixed gas compression and combustion by Plasma flow; Also want control combustion speed simultaneously; Expand internal combustion engine load range, make the work of internal-combustion engine equal energy high-efficiency cleaning in full working scope.
The invention has the beneficial effects as follows: the controlling method of this internal-combustion engine premixing compression and combustion can ensure good Economy, emission performance and power character.The homogeneous charge compression ignition mode that described combustion system adopts Plasma flow to control works, and internal-combustion engine homogeneous charge compression ignition itself has ultralow NOx and the advantage of carbon smoke exhaust, can save the exhaust aftertreatment device that cost is higher; Expansion ratio can be made rational valve timing to be greater than compression ratio, and its effective compression ratio is less than the minimum compression ratio of mixed gas involuntary ignition in firing chamber, and the thermal efficiency that such internal-combustion engine is high can be guaranteed; Supercharging also can be adopted to cool air inlet, increase air inflow, make up the problem that the air inflow of low compression ratio generation is few, improve power performance; By high-energy plasma stream igniter fire, not only ensure the reliability of lighting a fire, and key is jet flame district produces strong pressure wave, a large amount of unburned mixture is compressed further, and then multiple spot spontaneous combustion simultaneously, Ignition Timing controls near top dead center, has played the maximal efficiency of mixture combustion acting; And jet ignition can expand lean combustion ignition limit greatly simultaneously, guarantee the reliability that cold start-up is lighted a fire; Compression terminal mixture temperature is lower, extends delay period, reduces velocity of combustion; Adopt EGR Technology simultaneously, reduce velocity of combustion, expanded premixing compression and combustion upper load limit, ensure that the work of this combustion system high-efficiency cleaning in larger load range.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is a kind of Plasma flow controlling combustion engine premixing compression and combustion system schematic adopting Incylinder direct injection.
Fig. 2 is that Incylinder direct injection combustion system starts to form Plasma flow flame area schematic diagram.
Fig. 3 is that Incylinder direct injection combustion system forms Plasma flow flame area and multiple spot spontaneous combustion district schematic diagram.
Fig. 4 is a kind of Plasma flow controlling combustion engine premixing compression and combustion system schematic adopting port injection type.
Fig. 5 is that port injection type combustion system starts to form Plasma flow flame area schematic diagram.
Fig. 6 is that port injection type combustion system forms Plasma flow flame area and multiple spot spontaneous combustion district schematic diagram.
In figure: 1, firing chamber, 2, fuel injector, 3, jet ignition device, 4, intake duct, 5, Plasma flow flame area, 6, multiple spot spontaneous combustion district.
Embodiment
Plasma flow controlling combustion engine premixing compression and combustion system shown in Fig. 1, Fig. 2, Fig. 3, fuel injector is installed in firing chamber 1.
Plasma flow controlling combustion engine premixing compression and combustion system shown in Fig. 4, Fig. 5, Fig. 6, fuel injector is installed in intake duct 4.
In the Plasma flow controlling combustion engine premixing compression and combustion system shown in Fig. 1, fuel injector 2 to burner oil in firing chamber 1, forms premixed gas in intake stroke or compression stroke.Intake method adopts natural aspiration or super charge.When adopting super charge, pressurized air needs cooling, or adopts air inlet humidification, the modes such as water spray, and adjusts valve timing, reduces compression top center temperature, ensures that mixed gas can not spontaneous combustion.As shown in Figure 2, near top dead center, to igniter signal, produces high-temperature plasma Shu Huoyan.As shown in Figure 3, and instantaneous formation Plasma flow flame area 5, produce strong pressure wave, a large amount of unburned mixture of compression ignite, form large multiple spot spontaneous combustion district 6, control Ignition Timing.
In the plasma jet controlling combustion engine premixing compression and combustion system shown in Fig. 4, fuel injector 2 to burner oil in intake duct 4, forms premixed gas at intake stroke.Intake method adopts natural aspiration or super charge.When adopting super charge, pressurized air needs cooling, or adopts air inlet humidification, the modes such as water spray, and adjusts valve timing, reduces compression top center temperature, ensures that mixed gas can not spontaneous combustion.As shown in Figure 5, near top dead center, to igniter signal, produces high-temperature plasma Shu Huoyan.As shown in Figure 6, and instantaneous formation Plasma flow flame area 5, produce strong pressure wave, a large amount of unburned mixture of compression ignite, form large multiple spot spontaneous combustion district 6, control Ignition Timing.
Claims (5)
1. the method for a Plasma flow controlling combustion engine premixing compression and combustion Ignition Timing, the combustion system that this controlling method adopts comprises a firing chamber (1), a fuel injector (2), a jet ignition device (3), it is characterized in that: described fuel injector (2) is arranged in firing chamber (1) or intake duct (4), fuel injector (2) intake stroke or compression stroke in firing chamber (1) or at intake stroke to burner oil in intake duct (4), form premixed gas; Adopt low compression ratio, high expansion ratio thermodynamic cycle; Before compression top center, the mixed gas of Plasma flow flame area (5) ignition combustion chamber (1) interior jet through region produced by jet ignition device (3), produce pressure wave compression ignite unburned mixture, form multiple spot spontaneous combustion district (6), control Ignition Timing, realize premixing compression and combustion.
2. the method for Plasma flow controlling combustion engine premixing compression and combustion Ignition Timing according to claim 1, is characterized in that: described fuel injector (2), jet ignition device (3) are installed in firing chamber (1).
3. the method for Plasma flow controlling combustion engine premixing compression and combustion Ignition Timing according to claim 1, it is characterized in that: described fuel injector (2) is installed in intake duct (4), and jet ignition device (3) is installed in firing chamber (1).
4. the method for Plasma flow controlling combustion engine premixing compression and combustion Ignition Timing according to claim 1, it is characterized in that: described fuel adopts diesel oil, gasoline, gaseous fuel, fuel combination, wide-cut fuel or fuel combination, the fire behaviour adjustment valve timing of based on fuel, compression ratio is made to be less than the minimum effective compression ratio of mixed gas compression involuntary ignition.
5. the method for Plasma flow controlling combustion engine premixing compression and combustion Ignition Timing according to claim 1, is characterized in that: described combustion system adopts EGR Technology control combustion speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410837691.0A CN104612880A (en) | 2014-12-30 | 2014-12-30 | Method for controlling ignition phase of premixed compressed combustion in internal combustion engine through plasma beam jet flow |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410837691.0A CN104612880A (en) | 2014-12-30 | 2014-12-30 | Method for controlling ignition phase of premixed compressed combustion in internal combustion engine through plasma beam jet flow |
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| CN104612880A true CN104612880A (en) | 2015-05-13 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3921605A (en) * | 1974-02-04 | 1975-11-25 | Gen Motors Corp | Plasma jet ignition engine and method |
| US4446826A (en) * | 1981-01-07 | 1984-05-08 | Hitachi, Ltd. | Ignition system for internal combustion engine |
| CN1213743A (en) * | 1997-10-06 | 1999-04-14 | 杨锦耀 | Method of fuel conbustion in automotive engine combustion chamber by using plasma to excite fuel |
| CN101297109A (en) * | 2005-10-25 | 2008-10-29 | 通用汽车环球科技运作公司 | Combustion control method for a direct-injection controlled auto-ignition combustion engine |
| CN101855444A (en) * | 2007-11-16 | 2010-10-06 | 日产自动车株式会社 | Internal combustion engine |
-
2014
- 2014-12-30 CN CN201410837691.0A patent/CN104612880A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3921605A (en) * | 1974-02-04 | 1975-11-25 | Gen Motors Corp | Plasma jet ignition engine and method |
| US4446826A (en) * | 1981-01-07 | 1984-05-08 | Hitachi, Ltd. | Ignition system for internal combustion engine |
| CN1213743A (en) * | 1997-10-06 | 1999-04-14 | 杨锦耀 | Method of fuel conbustion in automotive engine combustion chamber by using plasma to excite fuel |
| CN101297109A (en) * | 2005-10-25 | 2008-10-29 | 通用汽车环球科技运作公司 | Combustion control method for a direct-injection controlled auto-ignition combustion engine |
| CN101855444A (en) * | 2007-11-16 | 2010-10-06 | 日产自动车株式会社 | Internal combustion engine |
Non-Patent Citations (1)
| Title |
|---|
| 隆武强: "射流控制柴油机预混合压缩着火相位和排放研究", 《内燃机工程》 * |
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Application publication date: 20150513 |