CN101270699A - Gas engine and its piston - Google Patents
Gas engine and its piston Download PDFInfo
- Publication number
- CN101270699A CN101270699A CNA2008100250393A CN200810025039A CN101270699A CN 101270699 A CN101270699 A CN 101270699A CN A2008100250393 A CNA2008100250393 A CN A2008100250393A CN 200810025039 A CN200810025039 A CN 200810025039A CN 101270699 A CN101270699 A CN 101270699A
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- CN
- China
- Prior art keywords
- piston
- nose
- petrol engine
- arc
- oil
- 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.)
- Pending
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- 239000000203 mixture Substances 0.000 claims abstract description 16
- 230000006835 compression Effects 0.000 claims abstract description 7
- 238000007906 compression Methods 0.000 claims abstract description 7
- 239000003921 oil Substances 0.000 claims description 30
- 238000002347 injection Methods 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 16
- 239000000295 fuel oil Substances 0.000 claims description 15
- 238000010304 firing Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 abstract description 14
- 239000000446 fuel Substances 0.000 abstract description 13
- 230000002265 prevention Effects 0.000 abstract 1
- 238000010298 pulverizing process Methods 0.000 abstract 1
- 238000007599 discharging Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010763 heavy fuel oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
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
Landscapes
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
The invention relates to a gasoline engine and the piston of the gasoline engine. The engine comprises a piston body equipped with two gas rings, an oil ring, a firebox and a pin hole, and is characterized in that the upper surface of said piston consists of a beveled arc groove, the arc bridge of nose and a valve prevention hole, which is able to well organize intake swirl and optimize the pulverization and the mixture of fuel from a fuel injector. The application of the invention realizes the layered mixture of gas and fuel in the cylinder and layered combustion, improves combustion thermal efficiency as well as solves a technical problem in high compression ratio, high power take-off and high response speed and meets the requirement of the further development of the high speed vehicle engine.
Description
Technical field
This invention relates to a kind of petrol engine and piston thereof, particularly inner cylinder direct injection petrol engine and piston thereof.
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, piston fitness for purpose in this case is not very high, the normal flat head piston that adopts is to reduce manufacture cost.After motor uses direct injection technology, fuel oil directly sprays in each firing chamber, this just has higher requirement to the firing chamber, must be able to make the abundant mixing of fuel oil and air, time for spraying and emitted dose to fuel oil are accurately controlled, realize that mixed gas fully burns, improve engine performance, fuel economy, reduce discharging.
The in-cylinder direct injection petrol engine is directly at cylinder the inside high-pressure injection fuel oil, realizes under charge air flow and piston-shaped guiding that gas in the jar flows to mix with fuel layering, thus the realization stratified mixture combustion, the raising combustion thermal efficiency.In the tradition intake port injection motor, the speed of response of fuel feeding and burning control all have been subjected to considerable restraint, and 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.Compare with the intake port injection petrol engine, direct spray petrol engine in cylinder can adopt higher compression ratio, reaches to solve high power output, high response speed, the technical problem of aspects such as low emission.
Summary of the invention
The object of the present invention is to provide the neotectonics of a kind of motor and piston thereof, enable to realize that gas in the jar flows mixes with fuel layering, thus the realization stratified mixture combustion, the raising combustion thermal efficiency.
The means that solve this technical problem mainly are the nose shapes that changes piston, in bridge of the nose district of piston head design, can organize the generation intake swirl well, make the fuel oil of oil sprayer ejection better atomize, mix, and then the realization stratified mixture combustion, the combustion efficiency of raising motor.High pressure fuel is ejected into the firing chamber from oil sprayer, can form denseer fuel-air mixture around spark plug under intake swirl and the piston-shaped guiding, and other parts are rarer, realize charge stratification burning in the cylinder, to improve combustion efficiency.
Concrete technological scheme is as follows: a kind of petrol engine piston, piston head are provided with an arc bridge of the nose, this bridge of the nose shape arc convex in the motor injection process, form arc bridge of the nose peripheral region than rich mixture.
In addition, piston head is positioned at the oil sprayer below and is provided with a curve bath, and it avoids fuel oil contact piston edge in the motor injection process, and piston head also is provided with recessed valve pit, and it is in order to avoid the collision of piston and valve.
Oil sprayer is installed in the last intake duct below of engine cylinder cover, and its axis tilts 10 °-30 ° with respect to the top of piston, and the oil spout direction is for pointing to the inner arc of the arc bridge of the nose.
The oil sprayer side, spark plug is mid-, is positioned at the top of the arc bridge of the nose, and an intake duct is arranged between oil sprayer and the spark plug.
Oil sprayer orientation of its axis arc bridge of the nose inner arc, spark plug is positioned at directly over the arc bridge of the nose, forms the arc bridge of the nose and spark plug near zone in the injection process than rich mixture.
When technological scheme of the present invention is applied to the direct spray petrol engine in cylinder piston, motor mainly is made of the piston body that is provided with twice compression ring, one oil ring, firing chamber, pin-and-hole, form by the curve bath of cutting sth. askew, the arc bridge of the nose, valve pit on the described piston upper surface, can organize the generation intake swirl well, make the fuel oil of oil sprayer ejection better atomize, mix.Adopt the present invention, can realize that gas in the jar flows and mixes with fuel layering, thus the realization stratified mixture combustion, the raising combustion thermal efficiency, solve the technical problem of aspects such as high compression ratio, the output of high power, high response speed, adapt to the needs of following high speed car motor better.
The present invention is specially adapted to the gasoline direct injection motor, and it is remarkable to use advantage, and advantage is as follows:
(1) compression ratio height;
(2) air distribution, flame propagation are good;
(3) power output is big, fuel consume is low.
Description of drawings
Fig. 1: the present invention is to the schematic representation of injected fuel motor tissue;
Fig. 2: the piston plan view among the present invention;
Fig. 3: the piston side view among the present invention;
Fig. 4: the piston stereo appearance figure among the present invention.
Description of reference numerals:
The 1-firing chamber; The 2-oil sprayer; The 3-spark plug; The 4-intake duct; The 5-piston; The 6-arc bridge of the nose; The 7-curve bath; The 8-valve pit; The 9-cylinder cap;
Embodiment
Accompanying drawing the 2, the 3rd, the top profile view of piston 5, piston crown adopts band nose shape zonal combustion chamber, below intake duct side oil sprayer 2, having designed the fuel oil that a curve bath of cutting sth. askew 7 avoids spraying directly contacts with nose shape piston 5 edges, bridge of the nose district 6 of piston head design, the fuel oil of being convenient to oil sprayer 2 ejections is organized eddy current.In order to realize the lightweight of piston 5, piston 5 global designs are lighter and handier, and head thickness is less, for fear of colliding with valve, designed valve pit 8.
The fuel oil of inner cylinder direct injection forms stratified mixtures under the tissue that gas in the jar flows, realize stratified mixture combustion.Oil sprayer 2 is installed in intake duct 4 belows on the cylinder cap 9, and the axis of oil sprayer tilts 10 °-30 ° with respect to piston head 5, the structure that oil sprayer 2 side spark plugs 3 are mid-.Adopt nose shape piston 5, after oil sprayer 2 oil spouts, flowed by air inlet and the piston motion of nose shape influences, most of mist of oil all concentrates on the nose shape zone of piston 5, to the compression stroke later stage, (piston nose shape zone is denseer, as the center by dense extremely rare mixed gas in formation in the firing chamber 1, thinning gradually toward external diffusion), before the igniting, be the center with spark plug 3, from thick to thin stratified mixtures is distributing, help smooth igniting, realize the layering lean-burn simultaneously.
Claims (10)
1, a kind of petrol engine piston is characterized in that, piston (5) top is provided with an arc bridge of the nose (6), this bridge of the nose shape arc convex in the motor injection process, form the arc bridge of the nose (6) peripheral region than rich mixture.
2, petrol engine piston according to claim 1 is characterized in that, piston (5) top is positioned at oil sprayer (2) below and is provided with a curve bath (7), and it avoids the edge of fuel oil contact piston (5) in the motor injection process.
3, petrol engine piston according to claim 1 and 2 is characterized in that, piston (5) top also is provided with recessed valve pit (8), and it is in order to avoid the collision of piston (5) and valve.
4, a kind of petrol engine that has as piston as described in the claim 1-3 is characterized in that, the oil spout direction of oil sprayer (2) is for pointing to the inner arc of the arc bridge of the nose (6).
5, petrol engine according to claim 4 is characterized in that, spark plug (3) is positioned at the top of the arc bridge of the nose (6).
6, petrol engine according to claim 4 is characterized in that, oil sprayer (2) is installed in last intake duct (4) below of engine cylinder cover (9), and its axis tilts 10 °-30 ° with respect to the top of piston (5).
7, petrol engine according to claim 4 is characterized in that, oil sprayer (2) side, and spark plug (3) is mid-.
8, petrol engine according to claim 7 is characterized in that, an intake duct (4) is arranged between oil sprayer (2) and the spark plug (3).
9, petrol engine according to claim 4, it is characterized in that, oil sprayer (2) the orientation of its axis arc bridge of the nose (6) inner arc, spark plug (3) are positioned at directly over the arc bridge of the nose (6), form the arc bridge of the nose (6) and spark plug (3) near zone in the injection process than rich mixture.
10, petrol engine according to claim 4, it is characterized in that, it is a direct spray petrol engine in cylinder, be provided with the piston of twice compression ring, one oil ring, firing chamber (1) and pin-and-hole, curve bath, the arc bridge of the nose (6) and the valve pit (8) of cutting sth. askew are arranged on piston (5) upper surface, said structure can be organized and produce intake swirl, makes the mixing that atomizes better of the fuel oil of oil sprayer ejection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100250393A CN101270699A (en) | 2008-04-24 | 2008-04-24 | Gas engine and its piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100250393A CN101270699A (en) | 2008-04-24 | 2008-04-24 | Gas engine and its piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101270699A true CN101270699A (en) | 2008-09-24 |
Family
ID=40004893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100250393A Pending CN101270699A (en) | 2008-04-24 | 2008-04-24 | Gas engine and its piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101270699A (en) |
Cited By (2)
| 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 |
| CN104727924A (en) * | 2013-12-21 | 2015-06-24 | 窦斌 | Gasoline engine combustion chamber with different combustion regions |
-
2008
- 2008-04-24 CN CNA2008100250393A patent/CN101270699A/en active Pending
Cited By (2)
| 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 |
| CN104727924A (en) * | 2013-12-21 | 2015-06-24 | 窦斌 | Gasoline engine combustion chamber with different combustion regions |
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20080924 |