CN1137096A - Piston for reciprocating fuel-oil engine - Google Patents
Piston for reciprocating fuel-oil engine Download PDFInfo
- Publication number
- CN1137096A CN1137096A CN95105861A CN95105861A CN1137096A CN 1137096 A CN1137096 A CN 1137096A CN 95105861 A CN95105861 A CN 95105861A CN 95105861 A CN95105861 A CN 95105861A CN 1137096 A CN1137096 A CN 1137096A
- Authority
- CN
- China
- Prior art keywords
- fuel
- piston
- recess
- firing chamber
- vortex
- 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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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/14—Direct injection into combustion chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
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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
Landscapes
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
A piston of direct-injection diesel engine has openings on its top surface to form combustion chamber with recesses whose number is equal to the number of fuel nozzles. The inner wall surface from beginning to center of said recess in vortex direction is set up on fuel spray axis of nozzle. As the fuel is sprayed towards upstream side in vortex direction, under cooperation of vortex, fuel is fully mixed with air and is uniformly distributed in combustion chamber. It features short ignition delay, high combustion efficiency and high performance.
Description
The present invention relates to direct injection type reciprocating fuel-oil (Diesel) engine piston.
Usually, direct spray type diesel engine, open clear 58-185921 number as the Japan Patent spy, the spy opens clear 63-170521 number, Te Kaiping 1-9641 number, and real open clear 62-148731 communique and the clear 63-186912 of Te Kai number, the spy opens clear 63-195315 number, the spy opens disclose on the clear 64-15424 communique such, usually the firing chamber that forms in the piston-top surface upper shed is constituted and have a plurality of recesses that on side wall surface, are processed to form, and formation has a plurality of shapes of stretching out along internal face, can make the fuel of injection and air-breathing good mixing by compression, shorten ignition delay time, improve combustion efficiency.
Yet, when the fuel of injecting burns in above-mentioned such firing chamber, combustion case is worsened because of flame propagation is subjected to the influence of vortex, cause engine performance to descend.
Therefore, the object of the invention is to provide and can makes ignition delay time shortening when injecting fuel combustion, improves the flame propagation situation, the reciprocating type engine fuel piston that combustion efficiency and performance are improved.
According to piston of the present invention, make in the firing chamber that the upper shed of piston crown end face forms to have and the same number of recess of fuel nozzle spout, and the wall that from processing begin scope to machining center till in of this recess on swirl direction is set on the fuel injection axis of this spout.
Because the relative swirl direction of fuel of coming from this fuel nozzle spout begins to spray to the recess wall of machining center scope to being positioned at from processing, mating reaction promotion fuel and air mixing because of all vortexs in this recess, fuel impels flame to propagate by same way as in the firing chamber because of the air turbulence that periphery in this recess produces evenly distributes in the firing chamber.
To the simple declaration of accompanying drawing,
Fig. 1 is the partial longitudinal section of expression automobile of the present invention with direct injection type diesel engine piston embodiment,
Fig. 2 is the drawing in side sectional elevation along the 2-2 line of Fig. 1,
Fig. 3 is the sectional drawing that the part among Fig. 2 is amplified,
Fig. 4 is the part sectioned view of expression automobile of the present invention with other embodiment of direct injection type diesel engine piston.
Fig. 1,2, the 3 expressions automobile of the present invention embodiment 1 of direct injection type diesel engine piston, particularly used the central injection h type engine h piston of fuel nozzle (not shown), in the corresponding to firing chamber 8 of end face 4 upper shed formation and piston shaft upper shed center of the bizet 2 of this piston 1 with 6 spouts.Limiting by the front edge 10 that on sidewall 9, stretches out of this firing chamber 8 in the opening scope on the end face 4.
In addition, on this firing chamber 8, form and the same number of 6 recesses 11 of its fuel nozzle spout, and make these recesses 11 respectively along the circumferential direction being processed to form on the little arc surface by equidistant formation on the sidewall 9 of this firing chamber 8.And, the zone 15 of ending from processing initial position 13 to machining center position 14 at the wall 12 of the recess 11 that is processed to form on the little arc surface that is positioned at like this along swirl direction 20 is set on the fuel injection axis 21 of this spout.In other words, be positioned at the zone from processing initial position 13 to machining center position 14 till of these recess 11 walls 12 by setting the fuel injection axis 21 make this spout respectively exactly along this swirl direction, and on the sidewall 9 of this firing chamber 8 these recesses of processing.And with the working depth of these recesses 11, the work in-process heart 14 is set at 3mm, exactly the recess that ends to this little circular arc wall 12 from the sidewall 9 of this firing chamber 8, much less, the working depth of this recess 11 becomes with the size of piston 1, and is set below 5mm, yet, be set in the 3-4mm usually.In addition, with the width of this recess 11, promptly so-called working width is set at about 1.5 times of its height, yet, preferably set for it and go back greatly highly about equally or than it.
In addition, in this piston 1,3 is the skirt section, and 5 is land or endless belt portion, and 6 is key seat, and 7 is pin-and-hole.
At recess 11, fuel is sprayed from the roundlet arc wall 12 of fuel nozzle to the upstream side that is positioned at eddy current direction 20, mating reaction at these recess 11 internal cause eddy current promotes fuel and air mixing, at this moment, because of fuel be attached to periphery air streams in this firing chamber 8 and this recess 11 on this periphery air stream of the turbulent condition of generation in this firing chamber 8 equally distributed result, the ignition delay time of fuel combustion is shortened, and flame is propagated by the same manner in this firing chamber 8.Thereby, adopt this piston 1 can improve automobile diesel engine combustion efficiency and performance.
Fig. 4 schematically illustrates automobile other concrete example with the piston of the present invention of direct injection type diesel engine.In this piston 14, on the sidewall 33 of firing chamber 32, be processed to form recess 34, wall 35 is by planar section 36, and roundlet cambered surface part 37 and planar section 38 are formed.
Hence one can see that, diesel engine piston of the present invention, be to have and the same number of recess of the spout of fuel nozzle in the firing chamber that the upper shed of piston crown end face forms, and setting the wall that begins to end to machining center scope from processing that this recess is positioned on the swirl direction for is on the fuel injection axis of this spout, in motor, fuel from fuel nozzle is sprayed to the part that is positioned at the swirl direction upstream side of this recess wall, mating reaction because of vortex, promote fuel and air in this recess, to mix, at this moment, because of fuel is attached to periphery air stream in this firing chamber and this of the turbulent condition that produces evenly distributes above periphery air stream in this firing chamber in this recess, the ignition delay time of fuel combustion is shortened, and pressing the same manner because of flame propagates, engine combustion efficiency and performance are improved, effectively promote the practicability of Reciprocating engine.
Claims (1)
1. piston for reciprocating fuel-oil engine, form the firing chamber in this piston crown end face upper shed, it is characterized in that this firing chamber formed and have the recess that equates with fuel nozzle mouth number, and set for and make being positioned at of described recess begin from processing that the wall of scope is on the fuel injection axis of described spout till the machining center on the swirl direction respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95105861A CN1137096A (en) | 1995-05-31 | 1995-05-31 | Piston for reciprocating fuel-oil engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95105861A CN1137096A (en) | 1995-05-31 | 1995-05-31 | Piston for reciprocating fuel-oil engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1137096A true CN1137096A (en) | 1996-12-04 |
Family
ID=5075610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95105861A Pending CN1137096A (en) | 1995-05-31 | 1995-05-31 | Piston for reciprocating fuel-oil engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1137096A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101790633B (en) * | 2007-06-15 | 2012-05-30 | 费德罗-莫格尔公司 | Piston and internal combustion engine therewith and method of constructing the piston |
-
1995
- 1995-05-31 CN CN95105861A patent/CN1137096A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101790633B (en) * | 2007-06-15 | 2012-05-30 | 费德罗-莫格尔公司 | Piston and internal combustion engine therewith and method of constructing the piston |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| REG | Reference to a national code |
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