CN101338694B - Method for in-cylinder direct-injection gasoline engine stratified equivalent proportion combustion - Google Patents
Method for in-cylinder direct-injection gasoline engine stratified equivalent proportion combustion Download PDFInfo
- Publication number
- CN101338694B CN101338694B CN 200810118653 CN200810118653A CN101338694B CN 101338694 B CN101338694 B CN 101338694B CN 200810118653 CN200810118653 CN 200810118653 CN 200810118653 A CN200810118653 A CN 200810118653A CN 101338694 B CN101338694 B CN 101338694B
- Authority
- CN
- China
- Prior art keywords
- equivalent proportion
- combustion
- gasoline engine
- stratified
- injection gasoline
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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 present invention discloses a direct injection gasoline engine stratified equivalent proportion combustion method which comprises the steps as follows: first fuel injection is processed during charging process, and homogeneous thin mixed gas is formed when an upper stop point is compressed; second or multiple fuel injections are processed during compressing process, and a dense mixed gas areais formed around a spark plug; the spark plug ignites to burn the fuel. The present invention also discloses a direct injection gasoline engine stratified equivalent proportion combustion system which comprises an oil atomizer, an electric control unit and the spark plug. When the method and the system of the present invention are used, harmful emission produced by gasoline delaminated equivalentproportion mixed gas combustion can be effectively controlled by the traditional gasoline engine three-way catalyst, thereby solving the problem that a first generation GDI stratified thin burning method has large difficulty for developing lean-burn catalyst and high cost and is not easy for controlling the discharge. At the same time, the stratified equivalent proportion combustion method can bring higher fuel economical efficiency than a second generation GDI homogeneous equivalent proportion combustion method and can inhibit detonation.
Description
Technical field
The present invention relates to technical field of internal combustion engines, particularly relate to a kind of method of in-cylinder direct-injection gasoline engine stratified equivalent proportion combustion.
Background technique
Direct spray petrol engine in cylinder can form the mixed gas of homogeneous or layering constantly by the control oil spout.The combustion method of the gasoline in-cylinder direct injection technology of having used at present mainly is divided into two kinds, i.e. layering lean combustion and homogeneous equivalent proportion burning.First generation GDI adopts the combustion method of layering lean combustion, mainly with 20th century the nineties Mitsubishi, Toyota and company such as daily output be representative, utilize internal combustion oil of cylinder to spray and form heterogeneous stratified mixtures, guarantee the instantaneous rich mixture that is easy to catch fire that around spark plug, forms of igniting, and all the other zones, firing chamber are weak mixture, but are excess air coefficient on the whole much larger than 1 lean combustion.But because layering lean-burn GDI motor can't use three-way catalyst, and the difficulty of lean-burn catalyst development and cost are very high, therefore along with constantly adding of Abgasgesetz tight this combustion method be restricted.
Second generation GDI adopts the combustion method of homogeneous equivalent proportion, form spark ignition behind the homogeneous charge by early spraying fuel in the cylinder in the aspirating stroke, remain under the stoichiometric proportion and work, thereby can adopt ripe three-way catalyst technology effectively to control engine emission like this.
But second generation GDI is owing to having adopted equivalent proportion homogeneous charge ignition combustion pattern, so pinking easily under the low speed high load working condition.(among the figure, 11 is oil sprayer to the mechanism of its pinking, and 12 is spark plug, and 13 are air inlet as shown in Figure 1,14 are exhaust, and 15 is the stoichiometric proportion homogeneous charge, and 16 is terminal mixed gas spontaneous combustion), at the low speed high load working condition, terminal equivalent proportion mixed gas by compression and thermal radiation, spontaneous combustion produces pinking easily.
Summary of the invention
The problem that the embodiment of the invention will solve provides a kind of method of in-cylinder direct-injection gasoline engine stratified equivalent proportion combustion, owing to adopt equivalent proportion homogeneous charge ignition combustion pattern, and cause conventional gasoline machine defective of pinking easily under the low speed high load working condition to overcome in the prior art.
For achieving the above object, the technological scheme of the embodiment of the invention provides a kind of method of in-cylinder direct-injection gasoline engine stratified equivalent proportion combustion, said method comprising the steps of: in intake process, carry out the fuel injection first time, when compression top center, form the homogeneous weak mixture; In compression process, carry out the second time or multiple fuel injection, in compression process, carry out after the second time or the multiple fuel injection, mixed gas integral body is in stoichiometric proportion in the cylinder, and forms rich mixture zone, periphery formation weak mixture zone, firing chamber on every side at spark plug; Plug ignition burns described fuel.
Wherein, the empty equivalent proportion λ of the combustion of described weak mixture＞1.
Wherein, the scope of the empty equivalent proportion λ of the combustion of described weak mixture is 1.2～2.0.
Wherein, the empty equivalent proportion λ of the combustion of described rich mixture＜1.
Wherein, the scope of the empty equivalent proportion λ of the combustion of described rich mixture is 0.7～0.9.
Compared with prior art, technological scheme of the present invention has following advantage:
Adopt when of the present invention, the noxious emission that gasoline layering equivalent proportion mixture combustion produces, can use conventional gasoline machine three-way catalyst to control effectively, solve that first generation GDI layering lean combustion method lean-burn catalyst development difficulty is big, cost is high, discharges uppity problem.Simultaneously, the combustion method of layering equivalent proportion can bring than the higher fuel economy of second generation GDI homogeneous equivalent proportion combustion method, and can suppress the generation of pinking.
Description of drawings
Fig. 1 is the mechanism schematic representation that a kind of petrol engine pinking of prior art takes place;
Fig. 2 is the flow chart of a kind of in-cylinder direct-injection gasoline engine stratified equivalent proportion combustion method of the embodiment of the invention;
Fig. 3 is the structural representation of a kind of gasoline direct injection engines stratified equivalent proportion combustion system of the embodiment of the invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used to illustrate the present invention, but are not used for limiting the scope of the invention.
The method of a kind of in-cylinder direct-injection gasoline engine stratified equivalent proportion combustion of the embodiment of the invention may further comprise the steps as shown in Figure 2:
Step s201 carries out the fuel injection first time in intake process, form the homogeneous weak mixture when compression top center.The empty equivalent proportion λ of the combustion of described weak mixture＞1, its scope can be 1.2～2.0.
Step s202 carries out the second time or multiple fuel injection in compression process, form the rich mixture zone around spark plug.The empty equivalent proportion λ of the combustion of described rich mixture＜1, its scope can be 0.7～0.9.At this moment, mixed gas integral body is in stoichiometric proportion in the cylinder.
Step s203, plug ignition burns described fuel.
The structural representation of a kind of gasoline direct injection engines stratified equivalent proportion combustion system of the embodiment of the invention as shown in Figure 3, wherein, 31 is oil sprayer, 32 is spark plug, and 33 are air inlet, and 34 are exhaust, 35 is the rich mixture district, it fires empty equivalent proportion λ=0.7～0.9, and 16 is the weak mixture district, and it fires empty equivalent proportion λ=1.2～2.0.This combustion system cylinder bore is 95 millimeters, and compression ratio is 11, is 60 ° high pressure cyclone umbrella spray gasoline electric-controlled fuel injector with cone angle, adopts twice injection.In in same work cycle, the fuel injection pulse signal that provides according to ECU (Electrical Control Unit) (control oil spout constantly and fuel injection quantity), carrying out the first time in intake process sprays, spray into 3/4 fuel, oil spout is 100 ° of air inlet atdc constantly, and these fuel have formed the homogeneous weak mixture when compression top center; Carrying out the second time then in compression process sprays, spray into 1/4 fuel, mixed gas integral body in the cylinder is adjusted to stoichiometric proportion, oil spout is preceding 100 ° of compression top center constantly, owing to have little time fully to spread and be subjected to the restriction of combustion recess, form than rich mixture in the center region, firing chamber.Like this, when compression top center, inflammable mixture forms two different zones of concentration in the cylinder, near the time of ignition spark plug is the rich mixture of air excess factor＜1, on every side for firing the weak mixture of empty equivalent proportion λ＞1, be in stoichiometric ratio on the whole, promptly form the mixed gas of layering equivalent proportion.From test result as can be known, adopt stratified equivalent proportion combustion method (the compression stroke secondary injection forms stratified mixtures) than homogeneous equivalent proportion combustion method (aspirating stroke is sprayed and formed homogeneous charge), the back inflammable mixture velocity of combustion of catching fire is fast, thermal efficiency height.
The present invention is by carrying out twice or multiple fuel injection in cylinder, form the mixed gas of the stoichiometric ratio of concentration stratification, be center, firing chamber (around the spark plug) mixed gas denseer, and periphery is a weak mixture, but still is stoichiometric proportion on the whole than stoichiometric proportion.Owing to around the instantaneous spark plug of igniting, be in the rich mixture district, can accelerate velocity of combustion, shorten the time that the flame front face arrives edge of combustion chamber; Secondly, layering makes that the firing chamber is a weak mixture away from the zone that pinking easily takes place spark plug, its involuntary ignition may be littler than equivalent mixed gas, and near compression top center, carry out secondary and three injections can reduce cylinder temperature, so just make the tendency that pinking takes place weaken.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1. the method for an in-cylinder direct-injection gasoline engine stratified equivalent proportion combustion is characterized in that, said method comprising the steps of:
In intake process, carry out the fuel injection first time, when compression top center, form the homogeneous weak mixture;
In compression process, carry out the second time or multiple fuel injection, in compression process, carry out after the second time or the multiple fuel injection, mixed gas integral body is in stoichiometric proportion in the cylinder, and forms rich mixture zone, periphery formation weak mixture zone, firing chamber on every side at spark plug;
Plug ignition burns described fuel.
2. the method for in-cylinder direct-injection gasoline engine stratified equivalent proportion combustion according to claim 1 is characterized in that, the empty equivalent proportion λ of the combustion of described weak mixture＞1.
3. as the method for in-cylinder direct-injection gasoline engine stratified equivalent proportion combustion as described in the claim 2, it is characterized in that the scope of the empty equivalent proportion λ of the combustion of described weak mixture is 1.2～2.0.
4. the method for in-cylinder direct-injection gasoline engine stratified equivalent proportion combustion according to claim 1 is characterized in that, the empty equivalent proportion λ of the combustion of described rich mixture＜1.
5. as the method for in-cylinder direct-injection gasoline engine stratified equivalent proportion combustion as described in the claim 4, it is characterized in that the scope of the empty equivalent proportion λ of the combustion of described rich mixture is 0.7～0.9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810118653 CN101338694B (en) | 2008-08-21 | 2008-08-21 | Method for in-cylinder direct-injection gasoline engine stratified equivalent proportion combustion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810118653 CN101338694B (en) | 2008-08-21 | 2008-08-21 | Method for in-cylinder direct-injection gasoline engine stratified equivalent proportion combustion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101338694A CN101338694A (en) | 2009-01-07 |
| CN101338694B true CN101338694B (en) | 2011-01-26 |
Family
ID=40212847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810118653 Active CN101338694B (en) | 2008-08-21 | 2008-08-21 | Method for in-cylinder direct-injection gasoline engine stratified equivalent proportion combustion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101338694B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182608A (en) * | 2011-03-16 | 2011-09-14 | 奇瑞汽车股份有限公司 | Combustion system of gasoline direct injection engine and control method thereof |
| JP5753142B2 (en) * | 2012-09-19 | 2015-07-22 | 本田技研工業株式会社 | Combustion control device for internal combustion engine and method for burning homogeneous lean mixture |
| CN103334846B (en) * | 2013-07-23 | 2016-03-30 | 清华大学 | A kind of judgement of super detonation and controlling method |
| CN105986915B (en) * | 2015-01-27 | 2019-01-29 | 江铃汽车股份有限公司 | A kind of control method of direct-injection supercharging gasoline engine super detonation |
| CN105201670A (en) * | 2015-09-08 | 2015-12-30 | 清华大学 | Method and device for inhibiting super-knock of supercharged direct-injection engine |
| US10711708B2 (en) * | 2017-08-25 | 2020-07-14 | Mazda Motor Corporation | Control device for engine |
| JP6642539B2 (en) * | 2017-08-25 | 2020-02-05 | マツダ株式会社 | Control device for compression ignition engine |
| CN113153594A (en) * | 2021-02-07 | 2021-07-23 | 联合汽车电子有限公司 | Lean combustion system and method |
| CN113417753B (en) * | 2021-07-30 | 2023-02-03 | 广西玉柴机器股份有限公司 | Control method for improving cold start of engine |
-
2008
- 2008-08-21 CN CN 200810118653 patent/CN101338694B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN101338694A (en) | 2009-01-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101338694B (en) | Method for in-cylinder direct-injection gasoline engine stratified equivalent proportion combustion | |
| CN101619670B (en) | Petrol engine spark ignition excite homogeneous compression ignition combustion control method | |
| CN109296446B (en) | Diesel micro-injection ignition natural gas engine combustion organization method with natural gas high-low pressure mixed injection and pre-combustion chamber | |
| CN103061908B (en) | Flexible double fuel HPCC engine combustion, discharge control method and device | |
| CN102057151B (en) | Fuel injection controller of internal combustion engine | |
| CN105545516B (en) | The control device of internal combustion engine | |
| CN112761780B (en) | Lean combustion system and method and engine | |
| CN104454190B (en) | Intra-cylinder direct injection double gas fuel ignition type combustion and control device | |
| CN109209656A (en) | A kind of multi-injection and precombustion chamber low pressure gas supply and diesel oil is micro- sprays the natural gas engine burning tissues method ignited | |
| CN210239841U (en) | Pre-combustion chamber jet flow flame ignition combustion system of piston type aviation heavy oil engine | |
| CN104712445A (en) | Compression ignition and ignition mixed combustion control method for single fuel and internal combustion engine | |
| CN108571392B (en) | Lean burn system and method for spark-ignition engine | |
| CN110318859A (en) | A kind of engine layering jet quick-burning method of multi-injection natural gas | |
| CN108547697A (en) | A kind of rotary engine using high-energy ignition technology | |
| CN104373207A (en) | Lean-combustion gas dual-fuel ignition type internal combustion engine system and control method | |
| CN102226426A (en) | Dual-fuel composite homogenous charge compression ignition combustion system based on activation heat atmosphere | |
| CN110529321A (en) | A kind of cylinder is interior to spray hydrogen rotator electromechanical control ignition control method | |
| CN110145405A (en) | The double injected petrol lean-combustion engines of perforated plate type atomizer | |
| CN107939517B (en) | Jet ignition-based engine ultrahigh compression ratio combustion control device and method | |
| CN1279271C (en) | Method of controlling charge compression Ignition of direct spray type gasoline engine homogeneous | |
| CN204299708U (en) | The two gaseous fuel Spark ignition type burning of a kind of in-cylinder direct injection and control gear | |
| CN106523227B (en) | The multi-point spark combustion system of the double injection apparatus of band | |
| CN101929364B (en) | Diffusion combustion method for knock-resisting compression ignition of equivalence-ratio gasoline direct injection engine | |
| US7404390B2 (en) | Method for operating an externally ignited internal combustion engine | |
| CN103216316A (en) | Low-temperature combustion method of internal-combustion engine with fuel reformation inside cylinders and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |