CN101265834A - Gasoline engine combustion system - Google Patents
Gasoline engine combustion system Download PDFInfo
- Publication number
- CN101265834A CN101265834A CNA2007100735101A CN200710073510A CN101265834A CN 101265834 A CN101265834 A CN 101265834A CN A2007100735101 A CNA2007100735101 A CN A2007100735101A CN 200710073510 A CN200710073510 A CN 200710073510A CN 101265834 A CN101265834 A CN 101265834A
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- China
- Prior art keywords
- piston
- degree
- oil
- gasoline engine
- intake duct
- Prior art date
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 19
- 239000003502 gasoline Substances 0.000 title claims abstract description 15
- 239000000446 fuel Substances 0.000 claims abstract description 26
- 230000007246 mechanism Effects 0.000 claims abstract description 7
- 239000003921 oil Substances 0.000 claims description 40
- 239000007921 spray Substances 0.000 claims description 17
- 239000000295 fuel oil Substances 0.000 claims description 10
- 238000010304 firing Methods 0.000 claims description 6
- 239000002828 fuel tank Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 abstract description 8
- 238000007906 compression Methods 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract 1
- 239000007924 injection Substances 0.000 description 9
- 238000002347 injection Methods 0.000 description 9
- 239000003595 mist Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000007599 discharging Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000010763 heavy fuel oil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
Images
Classifications
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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
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- Fuel-Injection Apparatus (AREA)
Abstract
The invention relates to a gasoline combustion system, which consists of a combustion chamber enclosed by a piston and a cylinder cover, a porous injector, a spark plug, an inlet channel, an exhaust passage, and a high and a low pressure fuel mechanisms capable of supplying high pressure fuel for the injector; the inlet channel is horizontal. The combustion system has the advantages that factors of engine performance such as fuel consumption and discharge are considered comprehensively; the injector is installed beneath the inlet channel; the porous injector is arranged beneath the horizontal inlet channel and opposite to the top of the piston with an inclination of 25 to 35 degree; the cone angle of the jet is 55 to 65 degree; the compression ratio can be improved; the air current is well organized; the flame transmission is good; and the fuel consumption is low.
Description
Technical field
The present invention relates to gasoline engine combustion system.
Background technique
Petrol engine in the market adopts multiple spot Electronic Fuel Injection (EFI) (MPI) more, fuel oil sprays in each cylinder intake duct, fuel oil with enter cylinder again after air mixes in air flue, this has limited the speed of response and the burning control of fuel feeding to a certain extent, thereby has limited the lifting of engine performance and fuel economy.In addition, in traditional intake port injection motor, the residual fuel oil that airway surface adheres to influences the control of fuel injection quantity accurate Calculation, under the cold start-up operating mode, also can bring the problem of discharging aspect especially.
The in-cylinder direct injection petrol engine is directly in cylinder the inside injected petrol, by to oil spout constantly and the accurate control of fuel injection pulsewidth, thereby accurately controls fuel injection quantity; Higher jet pressure makes fuel-oil atmozation good simultaneously, can mix with even air, promotes fuel mixture perfect combustion.Compare with the MPI petrol engine, direct spray petrol engine in cylinder can adopt higher compression ratio, brings the advantage of aspects such as high power output, high response speed.Direct spray petrol engine in cylinder mainly contains stratified charge type, homogeneous charging type etc. at present, the former utilizes wall guiding method or spray bundle guiding method, in cylinder, form stratified mixtures, at first by spark ignitor around it than rich mixture, carry out again flame propagation to remaining weak mixture zone with burning; The latter utilizes then that organized air motion interacts with the oil bundle in the cylinder, forms air fuel ratio near 1 homogeneous charge in most of operating mode scope.
Because spray angle is provided with inappropriately, cause compression ratio low in the existing gasoline engine combustion system, air distribution, flame propagation are bad; The fuel consume height.
Summary of the invention
The invention provides a kind of gasoline engine combustion system, low to solve existing gasoline engine combustion system compression ratio, air distribution, flame propagation are bad; The technical problem that fuel consume is high.
In order to solve above technical problem, the technological scheme that the present invention takes is:
A kind of gasoline engine combustion system, comprise firing chamber, porous oil sprayer, spark plug, intake duct, the air outlet flue that surrounds by piston and cylinder cap and can be the high and low pressure fuel oil mechanism that oil sprayer provides high pressure fuel, it is characterized in that, described intake duct is a horizontal type, described porous oil sprayer is arranged at the position of horizontal type intake duct below with respect to piston-top surface inclination 25-35 degree, and spray angle is the 55-65 degree.
Described porous oil sprayer is arranged at the position of horizontal type intake duct below with respect to piston-top surface inclination 28-32 degree, and described spray angle is the 58-62 degree.
Described porous oil sprayer is arranged at the position of horizontal type intake duct below with respect to piston-top surface inclination 29-31 degree, and described spray angle is the 59-61 degree.
Described high and low pressure fuel oil mechanism comprises high pressure oil rail, high pressure oil pump, fuel filter, low pressure fuel pump and fuel tank.
Described piston is the bowl-type piston of band pit.
After having adopted technique scheme, owing to taken all factors into consideration the factor of engine performance aspects such as fuel oil consumption and discharging, oil sprayer is installed in the intake duct below, according to intake duct and the formed spatial structure of cylinder head, the porous oil sprayer is arranged at the position of horizontal type intake duct below with respect to piston-top surface inclination 25-35 degree, spray angle is the 55-65 degree, adapting to the relative geometrical relation with the firing chamber, that has avoided may existing between mist of oil and piston head, cylinder sleeve and the intake valve contacts.Can improve compression ratio, air distribution, flame propagation are good; Fuel consume is low.It is low to have solved existing gasoline engine combustion system compression ratio, and air distribution, flame propagation are bad; The technical problem that fuel consume is high.
Description of drawings
Fig. 1 is an overall structure schematic representation of the present invention.
Fig. 2 is the structural representation of firing chamber part among the present invention.
Embodiment
As shown in Figure 1, a kind of gasoline engine combustion system, comprise firing chamber 1, porous oil sprayer 2, spark plug 3, intake duct 4, air outlet flue 5, piston 6 and high and low pressure fuel oil mechanism, high and low pressure fuel oil mechanism comprises high pressure oil rail 7, high pressure oil pump 8, fuel filter 9, low pressure fuel pump 10 and fuel tank 11, intake duct is a horizontal type, the porous oil sprayer is arranged at the position of horizontal type intake duct below with respect to piston-top surface inclination 25-35 degree, and spray angle is the 55-65 degree.Be generally ground, the porous oil sprayer is arranged at the position of horizontal type intake duct below with respect to piston-top surface inclination 28-32 degree, and spray angle is the 58-62 degree.Be preferably, the porous oil sprayer is arranged at the position of horizontal type intake duct below with respect to piston-top surface inclination 29-31 degree, and spray angle is the 59-61 degree.This place can select the porous oil sprayer to be arranged at the positions of horizontal type intake duct below with respect to piston-top surface inclination 30 degree, spray angle is 60 degree, piston is the bowl-type piston of band pit, when engine operation, fuel is at the intake stroke direct cylinder injection, oil spout can be spent to the top dead center in air inlet budc 40 by VVT constantly and be regulated between 110 degree, most of mist of oil all concentrates in the pit of piston after the oil nozzle oil spout, forming eddy current by air inlet drives mist of oil to form excess air coefficient in cylinder is 1 even mixed gas, when the Piston Compression mixed gas is near top dead center, ignite by plug ignition, then flame front advances rapidly, thereby finishes whole combustion process.In the working procedure, the piston head oil film is the main cause that forms soot, so should shift to an earlier date oil spout constantly as far as possible.Mist of oil can allow the contact piston top, but can not be reflected, and can increase the weight of oil dilution because the mist of oil of reflection is run into cylinder sleeve.Mist of oil can only be by avoiding with the interaction of inlet stream to the infiltration of exhaust side cylinder sleeve, i.e. oil spout must be finished before inlet stream weakens.By postponing the IO Intake Valve Opens angle, make intake lag, prolong injection time.It is extremely important that this point just seems under the slow-speed of revolution, because this moment, air inflow was less, under the little situation of air inlet disturbance, increases injection time and help to form homogeneous charging.In addition, when being applied to supercharged engine, should increase suitable turbulent flow, air inlet charge and mist of oil are interacted, reduce mist of oil and spread downwards, avoid wet wall phenomenon.Find that through overtesting the tendency to detonate of homogeneous charging type direct spray petrol engine in cylinder is little, all there is certain improvement aspect such as air distribution, flame propagation in the firing chamber.It is good to have compression ratio height, air distribution, flame propagation; The advantage that power output is big, fuel consume is low.
Claims (5)
1. gasoline engine combustion system, comprise firing chamber, porous oil sprayer, spark plug, intake duct, the air outlet flue that surrounds by piston and cylinder cap and can be the high and low pressure fuel oil mechanism that oil sprayer provides high pressure fuel, it is characterized in that, described intake duct is a horizontal type, described porous oil sprayer is arranged at the position of horizontal type intake duct below with respect to piston-top surface inclination 25-35 degree, and spray angle is the 55-65 degree.
2. gasoline engine combustion system as claimed in claim 1 is characterized in that, described porous oil sprayer is arranged at the position of horizontal type intake duct below with respect to piston-top surface inclination 28-32 degree, and described spray angle is the 58-62 degree.
3. gasoline engine combustion system as claimed in claim 1 is characterized in that, described porous oil sprayer is arranged at the position of horizontal type intake duct below with respect to piston-top surface inclination 29-31 degree, and described spray angle is the 59-61 degree.
4. as claim 1 or 2 or 3 described gasoline engine combustion systems, it is characterized in that described high and low pressure fuel oil mechanism comprises high pressure oil rail, high pressure oil pump, fuel filter, low pressure fuel pump and fuel tank.
5. as claim 1 or 2 or 3 described gasoline engine combustion systems, it is characterized in that described piston is the bowl-type piston of band pit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100735101A CN101265834A (en) | 2007-03-14 | 2007-03-14 | Gasoline engine combustion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100735101A CN101265834A (en) | 2007-03-14 | 2007-03-14 | Gasoline engine combustion system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101265834A true CN101265834A (en) | 2008-09-17 |
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ID=39988479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100735101A Pending CN101265834A (en) | 2007-03-14 | 2007-03-14 | Gasoline engine combustion system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101265834A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107401452A (en) * | 2016-05-20 | 2017-11-28 | 上汽通用汽车有限公司 | Turbocharged engine assembly |
-
2007
- 2007-03-14 CN CNA2007100735101A patent/CN101265834A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107401452A (en) * | 2016-05-20 | 2017-11-28 | 上汽通用汽车有限公司 | Turbocharged engine assembly |
| CN107401452B (en) * | 2016-05-20 | 2023-10-03 | 上汽通用汽车有限公司 | Turbocharged engine assembly |
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20080917 |