CN101943075A - Diffusion combustion method for detonation-free compression ignition for direct injection gasoline engine in lean-combustion cylinder - Google Patents
Diffusion combustion method for detonation-free compression ignition for direct injection gasoline engine in lean-combustion cylinder Download PDFInfo
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- CN101943075A CN101943075A CN2010102452217A CN201010245221A CN101943075A CN 101943075 A CN101943075 A CN 101943075A CN 2010102452217 A CN2010102452217 A CN 2010102452217A CN 201010245221 A CN201010245221 A CN 201010245221A CN 101943075 A CN101943075 A CN 101943075A
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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
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- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The invention discloses a diffusion combustion method for detonation-free compression ignition for a direct injection gasoline engine in a lean-combustion cylinder, and belongs to the technical field of combustion in internal combustion engines. In the method, due to the adoption of high compression ratio and pressurization, the compression ignition and heat release rate of gasoline are controlled through in-cylinder fuel injection, and gasoline detonation under the condition of compression ignition is avoided. The compression ratio (more than or equal to 13) adopted in the method is obviously higher than that of a traditional spark ignition gasoline engine so as to fulfill the aims of implementing compression ignition of gasoline and improving the thermal efficiency of the gasoline engine. High-pressure gasoline is directly injected into the cylinder and begins to ignite and combust after a period of ignition delay. Therefore, an initial combustion point is controllable; and the combustion and heat release rate is controlled through multi-section fuel injection so as to achieve detonation-free soft combustion. By adopting intake pressurization, the combustion method has the advantages of realizing lean combustion, guaranteeing full mixing of fuel and air, reducing the emission of carbon smoke and nitric oxides and improving the thermal efficiency.
Description
Technical field
The present invention relates to the combustion in IC engine technical field, particularly a kind of lean-burn direct spray petrol engine in cylinder does not have the diffusion combustion method of pinking compression ignition.
Background technique
The thermal efficiency of uniform-charge Otto-engine is generally about 30% at present, the thermal efficiency much smaller than diesel engine 40%, one of the main reasons is that its combustion manner is an equivalent proportion homogeneous charge spark ignition combustion, and the intrinsic pinking problem of this combustion manner has limited the raising of uniform-charge Otto-engine compression ratio; And, cause its thermal efficiency lower because of using the three-way catalyst can't lean-burn.
The combustion method of the gasoline in-cylinder direct injection technology of having used at present (GDI) mainly is divided into two kinds, i.e. layering lean combustion and homogeneous equivalent proportion burning, and its ignition mode is spark ignition.The burning organizational process complexity of layering lean-burn GDI motor, the control difficulty is big; And homogeneous equivalent proportion GDI petrol engine has been owing to adopted equivalent proportion homogeneous charge ignition combustion pattern, thus still can't overcome the pinking problem that uniform-charge Otto-engine has, and because can not lean-burn, so its energy-saving potential is limited.
Homogeneous charge compression ignition (HCCI) combustion method of Chu Xianing has been realized the work of petrol engine compression ignite in recent years, but the ignition timing of this petrol engine and burning rate of heat liberation are wayward, occur the combustion instability phenomenon easily; And its available load range is less, daily middle low speed cruises and the requirement of most of city operating mode though can satisfy, but can not satisfy high power output requirements such as acceleration, high-performance cruise, cause this motor also not obtain practicality at present just because of above these shortcomings.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is: provide a kind of lean-burn direct spray petrol engine in cylinder not have the diffusion combustion method of pinking compression ignition, to break through uniform-charge Otto-engine and homogeneous equivalent proportion GDI because of the scruple pinking and can't improve compression ratio and because can not lean-burn and the lower problem of the thermal efficiency; And the burning initial point and the rate of heat liberation that overcome homogeneous charge compression ignition petrol engine be difficult to accurate control, and the operating load scope difficulty that is difficult for widening, finally realizes petrol engine combustion technology efficient, cleaning.
(2) technological scheme
For achieving the above object, the present invention adopts following technological scheme.
The invention provides a kind of lean-burn direct spray petrol engine in cylinder does not have the diffusion combustion method of pinking compression ignition, comprising:
In aspirating stroke, improve the air temperature that enters cylinder by air intake pressurized;
In compression stroke and near the expansion stroke top dead center, electronic control unit controls sprays into Fuel Petroleum and controls time for spraying, injecting times and the each fuel injection quantity that sprays into Fuel Petroleum to described cylinder inner high voltage, make the overall excess air coefficient of combustion process greater than 1.0, do not have the lean combustion of pinking to realize Fuel Petroleum under the high compression ratio;
The compression stroke later stage to the expansion stroke initial stage, described Fuel Petroleum through one section delay period after the beginning multiple spot catch fire simultaneously.
Preferably, the compression ratio of described gasoline mixture is more than or equal to 13.
Preferably, the diffusion combustion method that described lean-burn direct spray petrol engine in cylinder does not have a pinking compression ignition also is included in the compression stroke and near the expansion stroke top dead center, described electronic control unit is controlled ignition timing and burning rate of heat liberation by the moment, number of times and the injection rate of control oil spout.
Preferably, adopt air intake pressurized, realize lean combustion, guarantee that fuel oil and air fully mix, reduce soot and discharged nitrous oxides, and improve the thermal efficiency.
(3) beneficial effect
The diffusion combustion method that lean-burn direct spray petrol engine in cylinder of the present invention does not have the pinking compression ignition makes the air temperature that enters cylinder improve by air intake pressurized, add and adopt higher compression ratio, guaranteed that the temperature in the compression stroke later stage cylinder can reach the spontaneous ignition temperature of gasoline.Electronic control unit is controlled the burning rate of heat liberation by the moment, number of times and the injection rate of control oil spout, make the rate of pressure rise and the highest detonation pressure be unlikely to too big, can control combustion duration again and be unlikely to drag oversizely, thereby make the diffusion combustion method of this kind direct spray petrol engine in cylinder compression ignition become soft controlled and the gasoline combustion mode that the thermal efficiency is very high of a kind of combustion process.
Gasoline has volatile characteristic, adds the effect of entrainmenting that high-pressure injection and high speed spray form, and big excess air coefficient in the cylinder, make spray into gasoline in the cylinder can finish at short notice oil droplet fragmentation, fuel gasification and with the process of air mixing; Cetane number owing to gasoline is lower simultaneously, so delay period is longer relatively, so the gasoline that sprays in the cylinder is able to fully mix with air, has suppressed the generation of a large amount of soots.The electronic control unit controls fuel injection quantity makes the overall excess air coefficient of combustion process greater than 1.0, has realized lean combustion, has guaranteed that fuel oil and air fully mix; Because lean-burn can reduce combustion temperature, reduced the generation of nitrogen oxide and soot, and improved the thermal efficiency simultaneously.
Embodiment
The lean-burn direct spray petrol engine in cylinder that the present invention proposes does not have the diffusion combustion method of pinking compression ignition, is described in detail as follows in conjunction with the embodiments.
A kind of lean-burn direct spray petrol engine in cylinder provided by the invention does not have the diffusion combustion method of pinking compression ignition, comprising by air intake pressurized makes the air temperature that enters cylinder improve, add that this petrol engine adopts higher compression ratio, for example, compression ratio 〉=13 have guaranteed that the temperature in compression stroke later stage cylinder can reach the spontaneous ignition temperature of gasoline.High pressure spray into Fuel Petroleum in the cylinder through one section delay period after, just begin the combustion process that multiple spot catches fire simultaneously, thereby the burning initial point of this kind combustion manner is a flexible and controllable.Electronic control unit (ECU) is controlled the burning rate of heat liberation by the moment, number of times and the injection rate of control oil spout, makes the rate of pressure rise and the highest detonation pressure be unlikely to too big, can control combustion duration again and be unlikely to drag oversizely.Especially, in aspirating stroke, adopt multistage fuel injection in the cylinder, thereby control is caught fire and rate of heat liberation.The diffusion combustion method that above technical measures make this kind direct spray petrol engine in cylinder not have the pinking compression ignition becomes soft controlled and the gasoline combustion mode that the thermal efficiency is very high of a kind of combustion process.
Gasoline has volatile characteristic, adds the effect of entrainmenting that high-pressure injection and high speed spray form, and big excess air coefficient in the cylinder, make spray into gasoline in the cylinder can finish at short notice oil droplet fragmentation, fuel gasification and with the process of air mixing; Cetane number owing to gasoline is lower simultaneously, so delay period is longer relatively, so the gasoline that sprays in the cylinder is able to fully mix with air, has suppressed the generation of a large amount of soots.ECU control fuel injection quantity makes the overall excess air coefficient of combustion process greater than 1.0, to realize lean combustion, guarantees that fuel oil and air fully mix; Because lean-burn can reduce combustion temperature, reduced the generation of nitrogen oxide and soot, and improved the thermal efficiency simultaneously.
Compression ignition and rate of heat liberation by internal combustion oil of cylinder sprays control gasoline adopt high compression ratio and air intake pressurized, realize lean combustion.Based on the various supercharging modes (as engine driven supercharging, turbosupercharging, multistage composite supercharging etc.) and the various pressure ratio of this combustion mode, and the protection domain that all should be this patent based on the various Load Regulation modes (regulating, measure adjusting etc. as matter) of this combustion mode.In ideal conditions; can in the whole working condition plane, adopt the diffusive combustion pattern of single gasoline compression ignition, also should be within the protection domain of this patent but other gasoline combustion pattern (for example homogeneous light etc.) and this combustion mode are mixed the gasoline combustion method of using in the whole working condition plane.
Above mode of execution only is used to illustrate the present invention; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; under the situation that does not break away from the spirit and scope of the present invention; can also make various variations and modification; therefore all technological schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (4)
1. a lean-burn direct spray petrol engine in cylinder does not have the diffusion combustion method of pinking compression ignition, it is characterized in that the diffusion combustion method that described lean-burn direct spray petrol engine in cylinder does not have the pinking compression ignition comprises:
In aspirating stroke, improve the air temperature that enters cylinder by air intake pressurized;
In compression stroke and near the expansion stroke top dead center, electronic control unit controls sprays into Fuel Petroleum and controls time for spraying, injecting times and the each fuel injection quantity that sprays into Fuel Petroleum to described cylinder inner high voltage, make the overall excess air coefficient of combustion process greater than 1.0, do not have the lean combustion of pinking to realize Fuel Petroleum;
The compression stroke later stage to the expansion stroke initial stage, described Fuel Petroleum through one section delay period after the beginning multiple spot catch fire simultaneously.
2. lean-burn direct spray petrol engine in cylinder as claimed in claim 1 does not have the diffusion combustion method of pinking compression ignition, it is characterized in that, the compression ratio of described gasoline mixture is more than or equal to 13.
3. do not have the diffusion combustion method of pinking compression ignition as claim 1 or 2 described lean-burn direct spray petrol engine in cylinder, it is characterized in that,
The diffusion combustion method that described lean-burn direct spray petrol engine in cylinder does not have a pinking compression ignition also is included in the compression stroke and near the expansion stroke top dead center, described electronic control unit is controlled ignition timing and burning rate of heat liberation by the moment, number of times and the injection rate of control oil spout.
4. do not have the diffusion combustion method of pinking compression ignition as claim 3 described lean-burn direct spray petrol engine in cylinder, it is characterized in that, adopt air intake pressurized, realize lean combustion, guarantee that fuel oil and air fully mix, reduce soot and discharged nitrous oxides, and improve the thermal efficiency.
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| CN2010102452217A CN101943075A (en) | 2010-08-04 | 2010-08-04 | Diffusion combustion method for detonation-free compression ignition for direct injection gasoline engine in lean-combustion cylinder |
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| CN2010102452217A CN101943075A (en) | 2010-08-04 | 2010-08-04 | Diffusion combustion method for detonation-free compression ignition for direct injection gasoline engine in lean-combustion cylinder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015085645A1 (en) * | 2013-12-13 | 2015-06-18 | 周向进 | Combined homogeneous compression ignition and diffused compression ignition combustion control method for low-octane-value gasoline |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2221105Y (en) * | 1995-04-05 | 1996-02-28 | 陈俊川 | Automotive gasoline boosting and diluting device |
| JP2003013785A (en) * | 2001-06-28 | 2003-01-15 | Nissan Motor Co Ltd | Control device of direct injection spark ignition type internal combustion engine |
| GB2420152A (en) * | 2004-11-10 | 2006-05-17 | Lotus Car | Pressure-charged gasoline internal combustion engine |
| JP2008267276A (en) * | 2007-04-20 | 2008-11-06 | Toyota Motor Corp | Fuel injection quantity control device for internal combustion engine |
-
2010
- 2010-08-04 CN CN2010102452217A patent/CN101943075A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2221105Y (en) * | 1995-04-05 | 1996-02-28 | 陈俊川 | Automotive gasoline boosting and diluting device |
| JP2003013785A (en) * | 2001-06-28 | 2003-01-15 | Nissan Motor Co Ltd | Control device of direct injection spark ignition type internal combustion engine |
| GB2420152A (en) * | 2004-11-10 | 2006-05-17 | Lotus Car | Pressure-charged gasoline internal combustion engine |
| JP2008267276A (en) * | 2007-04-20 | 2008-11-06 | Toyota Motor Corp | Fuel injection quantity control device for internal combustion engine |
Non-Patent Citations (2)
| Title |
|---|
| 梁小强, 刘圣华, 周龙保: "火花点火发动机冷启动和暖机过程未燃碳氢排放及控制", 《内燃机》, no. 3, 30 June 2005 (2005-06-30), pages 36 - 39 * |
| 王志等: "均质压燃发动机研究开发新进展", 《车用发动机》, no. 03, 30 June 2007 (2007-06-30), pages 1 - 7 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015085645A1 (en) * | 2013-12-13 | 2015-06-18 | 周向进 | Combined homogeneous compression ignition and diffused compression ignition combustion control method for low-octane-value gasoline |
| US10174703B2 (en) | 2013-12-13 | 2019-01-08 | Xiangjin Zhou | Combined homogeneous compression ignition and diffused compression ignition combustion control method for low-octane-value gasoline |
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