CN201121544Y - Direct-spraying petrol engine cylinder cover - Google Patents
Direct-spraying petrol engine cylinder cover Download PDFInfo
- Publication number
- CN201121544Y CN201121544Y CNU2007201914246U CN200720191424U CN201121544Y CN 201121544 Y CN201121544 Y CN 201121544Y CN U2007201914246 U CNU2007201914246 U CN U2007201914246U CN 200720191424 U CN200720191424 U CN 200720191424U CN 201121544 Y CN201121544 Y CN 201121544Y
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- CN
- China
- Prior art keywords
- cylinder cover
- engine
- intake duct
- gasoline engine
- cylinder
- 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.)
- Expired - Fee Related
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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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- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
The utility model relates to a cylinder cover used for a direct injection petrol engine. The cylinder cover comprises a cylinder cover body which is provided with a plurality of inlet channels, the inlet channels are downthrust type straight channels and incline in a lange-angle, the inlet channels are large at the upper part and small at the lower part, the two sides of the inlet channels are both provided with an exhaust gas recirculation passage which aims at the outer wall of the opening of each inlet channel. The part arranged at the top of a fire chamber of the direct injection petrol engine of the bottom of the cylinder cover body is a roof ridge type. The fire chamber formed by the cylinder cover matching with a lambdoidal piston crown forms strong rotational flow in the gas intake and compression stroke of the engine, and forms strong throttling current at the tail end of the compression stroke, realizes that mixed gases are formed around a spark plug and the mixed gases are formed at the periphery, realizes thin ignition and stratified combustion, at the same time, can improve the cold start performance of the engine and the Nox discharging of the engine.
Description
Technical field
The utility model belongs to automobile component and makes the field, relates in particular to a kind of directly jetting gasoline engine cylinder cap.
Background technique
Directly jetting gasoline engine advantage be that oil consumption is low, power per liter is big, the output of power and moment of torsion is higher, can improve the cold starting property of motor simultaneously, one of key technology that realizes these advantages is the layering lean burn technology.The layering lean burn technology mainly is to utilize swirling motion in the cylinder, makes near the mixed gas that accumulates in the spark plug the denseest, earlier by spark ignitor, advances burning to skin rapidly then, adopts the motor of layering lean burn technology can adopt higher compression ratio.Air motion depends on the design of air flue, combustion-chamber shape and piston head shape in the cylinder, so the design of cylinder cap has special important meaning to air motion in the cylinder of directly jetting gasoline engine.Used cylinder cap in the regular price gasoline machine, intake duct tilts inadequately, and the top of the firing chamber that cylinder cap and piston space form is also more smooth, and it is relatively poor that this structure forms the effect of swirling motion in the cylinder.
Summary of the invention
The utility model to provide a kind of and can effectively form swirling motion in the cylinder in order to solve the problems of the technologies described above, and satisfies performance requirement, processes better simply again directly jetting gasoline engine cylinder cap.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals: the utility model comprises cylinder body, cylinder body is provided with some intake ducts, described intake duct is the straight air flue of diving type, and be wide-angle tilt, the part at top that the bottom surface of described cylinder body is positioned at the firing chamber of directly jetting gasoline engine is ridge-roof type.At engine charge and compression stroke initial stage, in conjunction with the piston head of the gabled roof shape of designing voluntarily, in cylinder, form surging eddy flow, form strong crowded stream in the compression stroke later stage.Wherein tangential eddy current helps to realize that mixed gas evenly distributes and the quickening velocity of combustion in the cylinder, vertically roll stream and help to realize charge stratification in the cylinder, realize mixed gas in cylinder by the concentration gradient layered arrangement---make the mixed gas at close spark plug place denseer relatively, mixed gas away from the spark plug place is rarer relatively, so just in cylinder, realize the layering of mixed gas, thereby realized " thin " igniting and stratified mixture combustion.
As preferably, the angle α that described intake duct and cylinder body bottom surface form is 35 °～40 °.Further guarantee in cylinder, to form strong eddy flow.
As preferably, described intake duct is up big and down small.Similar funnel-like is further guaranteed to obtain the stronger stream that rolls.
As preferably, the both sides of described intake duct are provided with exhaust gas recirculation passage, and exhaust gas recirculation passage is aimed at the outer wall at the road junction of described intake duct.By the layering that the stream motion realizes exhaust gas recirculation of rolling of air-flow in the cylinder, guarantee near the quality of the mixed gas of spark plug, improve the discharging of the Nox of motor.
The beneficial effects of the utility model are: the shape of top section that is positioned at the firing chamber of directly jetting gasoline engine by the bottom surface of improving intake duct inclination and cylinder body, the firing chamber that makes the cylinder cap of directly jetting gasoline engine cooperate the piston head of design voluntarily to surround forms strong eddy flow in engine charge and compression stroke, can also be at the strong crowded stream of the terminal formation of compression stroke, realize mixed gas in cylinder by the concentration gradient layered arrangement---form rich mixture on every side at spark plug, form weak mixture in the periphery, realize " thin " igniting and stratified mixture combustion, the guarantee point realization smooth combustion of fighting, improve the discharging of the Nox of motor simultaneously, process more convenient again.
Description of drawings
Fig. 1 is a kind of plan structure schematic representation of the present utility model.
Fig. 2 is the structural representation of a kind of air inlet side of the present utility model.
Fig. 3 is a kind of structural representation of looking up of the present utility model.
Fig. 4 is a kind of partial schematic diagram of vertically analysing and observe from the center of the present utility model.
1. cylinder bodies among the figure, 2. intake duct, 3. firing chamber, 4. exhaust gas recirculation passage.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment 1: the directly jetting gasoline engine cylinder cap of present embodiment, as Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, comprise cylinder body 1, four intake ducts 2 are arranged on the cylinder body 1, and intake duct 2 is the straight air flue of diving type, and is wide-angle tilt, intake duct 2 is 38 ° with the angle α that cylinder body 1 bottom surface forms, intake duct 2 is up big and down small, and the both sides of intake duct 2 are provided with exhaust gas recirculation passage 4, and exhaust gas recirculation passage 4 is aimed at the outer wall at the road junction of intake duct 2.The part at top that the bottom surface of cylinder body 1 is positioned at the firing chamber 3 of directly jetting gasoline engine is ridge-roof type 4.
Use directly jetting gasoline engine of the present utility model,,, in cylinder, form surging eddy flow, form strong crowded stream in the compression stroke later stage in conjunction with the piston head that is gabled roof shape in the cylinder body at engine charge and compression stroke initial stage.Wherein tangential eddy current helps to realize that mixed gas evenly distributes and the quickening velocity of combustion in the cylinder, vertically roll stream and help to realize charge stratification in the cylinder, realize mixed gas in cylinder by the concentration gradient layered arrangement---make the mixed gas at close spark plug place denseer relatively, mixed gas away from the spark plug place is rarer relatively, so just in cylinder, realized the layering of mixed gas, thereby realize " thin " igniting and stratified mixture combustion, it is low to guarantee that directly jetting gasoline engine has oil consumption, power per liter is big, the performance that the output of power and moment of torsion is higher can be improved the discharging of the Nox of the cold starting property of motor and motor simultaneously.
Claims (5)
1. directly jetting gasoline engine cylinder cap, comprise cylinder body (1), cylinder body (1) is provided with some intake ducts (2), it is characterized in that described intake duct (2) is the straight air flue of diving type, and be wide-angle tilt, the part at top that the bottom surface of described cylinder body (1) is positioned at the firing chamber (3) of directly jetting gasoline engine is ridge-roof type.
2. directly jetting gasoline engine cylinder cap according to claim 1 is characterized in that described intake duct (2) and the angle α that cylinder body (1) bottom surface forms are 35 °～40 °.
3. directly jetting gasoline engine cylinder cap according to claim 1 and 2 is characterized in that described intake duct (2) is up big and down small.
4. directly jetting gasoline engine cylinder cap according to claim 1 and 2 is characterized in that the both sides of described intake duct (2) are provided with exhaust gas recirculation passage (4), and exhaust gas recirculation passage (4) is aimed at the outer wall at the road junction of described intake duct (2).
5. directly jetting gasoline engine cylinder cap according to claim 3 is characterized in that the both sides of described intake duct (2) are provided with exhaust gas recirculation passage (4), and exhaust gas recirculation passage (4) is aimed at the outer wall at the road junction of described intake duct (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201914246U CN201121544Y (en) | 2007-11-21 | 2007-11-21 | Direct-spraying petrol engine cylinder cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201914246U CN201121544Y (en) | 2007-11-21 | 2007-11-21 | Direct-spraying petrol engine cylinder cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201121544Y true CN201121544Y (en) | 2008-09-24 |
Family
ID=40008770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201914246U Expired - Fee Related CN201121544Y (en) | 2007-11-21 | 2007-11-21 | Direct-spraying petrol engine cylinder cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201121544Y (en) |
-
2007
- 2007-11-21 CN CNU2007201914246U patent/CN201121544Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080924 Termination date: 20131121 |