CN1069098A - Combustion chamber of piston engine - Google Patents
Combustion chamber of piston engine Download PDFInfo
- Publication number
- CN1069098A CN1069098A CN 91105081 CN91105081A CN1069098A CN 1069098 A CN1069098 A CN 1069098A CN 91105081 CN91105081 CN 91105081 CN 91105081 A CN91105081 A CN 91105081A CN 1069098 A CN1069098 A CN 1069098A
- Authority
- CN
- China
- Prior art keywords
- piston
- combustion chamber
- boss
- chamber
- main combustion
- 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
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 40
- 238000007906 compression Methods 0.000 claims abstract description 37
- 230000006835 compression Effects 0.000 claims abstract description 31
- 238000010304 firing Methods 0.000 claims description 10
- 238000005516 engineering process Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 4
- 239000007921 spray Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Images
Classifications
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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
- F02B21/00—Engines characterised by air-storage chambers
- F02B21/02—Chamber shapes or constructions
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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
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0618—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston having in-cylinder means to influence the charge motion
- F02B23/0627—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston having in-cylinder means to influence the charge motion having additional bores or grooves machined into the piston for guiding air or charge flow to the piston bowl
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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
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0618—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston having in-cylinder means to influence the charge motion
- F02B23/063—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston having in-cylinder means to influence the charge motion the combustion space in the piston interacting fluid dynamically with the cylinder head, the injector body or the cylinder wall
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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
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
- F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
- F02B23/0675—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston the combustion space being substantially spherical, hemispherical, ellipsoid or parabolic
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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
-
- 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
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Geometry (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
The invention relates to a combustion chamber of a piston engine. The piston of the engine is provided with an annular step or a boss, the cylinder cover or the cylinder wall is provided with an annular boss or a groove, the step and the boss (or the boss and the groove) enclose a compression cavity with an annular cross section, the compression cavity is communicated with the main combustion chamber through a channel, and after being compressed, gas in the compression cavity is sprayed into the main combustion chamber in a jet flow manner to form extremely strong turbulence and vortex, so that the combustion speed is accelerated, and the efficiency of the engine is improved. By matching with the dilute phase combustion technology, a 'dilute phase-rapid' combustion chamber can be formed.
Description
The present invention relates to combustion chamber of piston engine.
For reciprocating engine, in identical combustion gas than under the condition, turbulence intensity is the principal element of control rate of burning, the speed of combustion process depends on the speed that sweeps across of turbulence intensity and average flow to a great extent, therefore, improving turbulence intensity is the effective way of improving engine efficiency to improve combustion position.Existing piston formula motor is that the vortex that produced by gas handling system in intake process generates and control turbulent flow and the mixed process in it.Regrettably, the turbulent flow of this vortex and generation thereof has been decayed much after through air inlet and compression process, so that to improving much effects of not burnt.For spark ignition engines, adopt the dilute phase mixed combusting technology more and more widely, this burning can reduce harmful matter in the effulent (NO particularly significantly
X), thereby can reduce the expensive expense of handling waste gas, but this combustion technology descends rate of burning, thus reduced the specific power of motor.
General purpose of the present invention is to overcome existing piston-engined above-mentioned defective, a kind of improved firing chamber with additional compression chamber is provided, this improvement makes that turbulent flow and voorticity are improved in the latter stage of compression process main combustion chamber, accelerate velocity of combustion, thereby improved the efficient of motor.
Another object of the present invention is to cooperate the dilute phase combustion technology that a kind of " dilute phase one is quick " firing chamber is provided.
The objective of the invention is to realize by the shape that changes piston and cylinder cap or casing wall, on piston, be provided with annular boss or step, on cylinder cap or casing wall, be provided with annular groove or boss, boss on the piston (or step) matches with groove (or boss) on cylinder cap or the casing wall, in the latter stage of compression process, form the compression chamber of one or more sealings, compression ratio in the compression chamber is higher than the compression ratio of main combustion chamber, after gas is subjected to further compression in it, through passage and the nozzle between compression chamber and main combustion chamber, spray into main combustion chamber with very high speed, in main combustion chamber, generate strong turbulent flow and rotatablely move, simultaneously, rotate (sweeping across) motion apace by means of average flow, flame is promptly spread all over whole firing chamber, thereby accelerated rate of burning, improved the efficient of motor.
Have found that, adopt said structure of the present invention, in compression process latter stage, the average turbulence intensity in the main combustion chamber improves more than ten times, thereby has improved the efficient of motor significantly.
Below in conjunction with embodiment and accompanying drawing thereof the present invention is described further.Wherein,
Fig. 1 is the basic structure sectional drawing of the reciprocating engine firing chamber of proposition according to the present invention;
Fig. 2 is the schematic representation of the situation that is provided with of passage among reflection Fig. 1;
Fig. 3-the 7th, the sectional drawing of other embodiments of the invention, wherein, the structure shown in Fig. 3 and 5 is applicable to diesel engine, Fig. 4,6 and 7 structure are applicable to petrol engine.
In above-mentioned each figure, the identical or associated components of same numeral representative, label 1 expression piston, step or boss on the 2 expression pistons, 3 expression cylinder walls, 4 expression cylinder head, boss or groove on 5 expression cylinder head or the cylinder wall, 6 expression passages, 7 expression main combustion chambers, 8 expression compression chambers.
Fig. 1 is a basic structure schematic representation of the present invention.At this Fig. 1, there is a ring-shaped step 2 on the top of piston 1, and piston 1 can slide in cylinder.With described step 2 corresponding positions an annular boss 5 is arranged on the cylinder head 4, the ring-shaped step 2 on this annular boss 5 and the piston 1 matches, and in the latter stage of compression process, forms a compression chamber 8 with circular crosssection.Near the position of step 2, be provided with one group of passage 6 on piston 1, these passages 6 are communicated with compression chamber 8 and main combustion chamber 7.When piston 1 was in top dead center, the volume of compression chamber 8 was zero, and therefore, the compression ratio in the compression chamber 8 is higher than the compression ratio in the main combustion chamber 7.In compression process latter stage, after this compression chamber 8 forms, gas in it is subjected to further compressing, spray into main combustion chamber 7 through passage 6 with very high speed then, form several strands of powerful turbulent jets in main combustion chamber 7, these jets have greatly improved the turbulence intensity in the main combustion chamber.Simultaneously, as shown in Figure 2, the orientation of passage 6 and piston radially inconsistent, the angle between them is A, so just can form whole rotatablely moving in main combustion chamber, this helps to make flame to spread all over whole firing chamber rapidly.And at the igniting initial stage, jet does not touch nucleus of flame, helps keeping the stable of flame.In Fig. 1, the angle between passage 6 and the horizontal plane is B, because under situation shown in Figure 1, passage 6 is straight, and therefore above-mentioned angle A and B have determined gas in the compression chamber 8 to the injection direction of main combustion chamber 7.
Fig. 3-6 demonstrates two kinds respectively and implements structure, because the rotation symmetry, so every kind of half that implement structure its section only is shown in the following description, is called first kind of structure with every width of cloth figure left-half section, the right half part section is called second kind of structure.
In Fig. 3, main combustion chamber 7 is positioned on the piston, the characteristics of first kind of structure are, the top of piston 1 is provided with annular boss 2, there is annular groove 5 position corresponding with described boss 2 of cylinder head 4, compression chamber 8 is formed by groove 5 and boss 2 cooperations, and the one group of passage 6 that is provided with on cylinder head 4 comprises horizontal segment that links to each other with compression chamber 8 and the tilting section that links to each other with main combustion chamber.The characteristics of second kind of structure are, piston 1 top is provided with ring-shaped step 2, and cylinder head 4 is provided with annular boss 5, and compression chamber 8 is surrounded by step 2, boss 5 and cylinder wall 3, one group of passage 6 horizontal alignment that forms on piston 1.
In Fig. 4, main combustion chamber 7 is mainly on cylinder head.The characteristics of first kind of structure are, piston 1 top is provided with ring-shaped step 2, and cylinder wall 3 inboards are provided with annular boss 5, and compression chamber 8 is surrounded by step 2, cylinder wall 3 and boss 5, and the one group of passage 6 that forms on piston 1 is communicated with main combustion chamber 7 obliquely from compression chamber 8.The different of first kind of structure are that annular boss 5 is located on the cylinder head 4 among second kind of structure and this figure.
In Fig. 5, main combustion chamber 7 is by constituting in the part on the piston 1 and the another part on cylinder head 4.The characteristics of first kind of structure are, piston 1 top is provided with annular boss 2, and cylinder head 4 is provided with annular groove 5 and one group of passage 6, and compression chamber 8 is surrounded by groove 5 and boss 2.The characteristics of second kind of situation are, piston 1 top is provided with ring-shaped step 2, and cylinder head 4 is provided with boss 5, and step 2, boss 5 and cylinder wall 3 surround compression chamber 8, and passage 6 is positioned on the piston 1 and comprises horizontal segment and tilting section.
In Fig. 6, main combustion chamber 7 is on cylinder head 4.The characteristics of first kind of structure are, piston 1 top is provided with ring-shaped step 2, and cylinder head 4 is provided with annular boss 5, and passage 6 is positioned on the piston 1.The characteristics of second kind of situation are, piston 1 top is provided with annular boss 2, and cylinder head 4 is provided with annular groove 5 and one group of passage 6.
Consider the distribution of four stroke engine upper air valve, spirit according to the present invention has proposed structure shown in Figure 7, be characterized in, and more than 8 of compression chambers in this structure, these compression chambers or independently, or by channel connection.Like this, both can utilize existing space, not influence the distribution (especially to four air valve cylinders) of air valve again.According to same principle, the new combustion chamber structure that the present invention proposes can be suitable for multi-form reciprocating engine such as two-stroke, four-stroke and six-stroke.
Firing chamber of the present invention cooperates with the dilute phase combustion technology can form " dilute phase one is quick " firing chamber.
Under the condition that does not break away from the spirit and scope of the present invention, can make various conversion or improvement, such as the parameters such as sectional shape that change spray angle and passage, these all belong to protection scope of the present invention.
Claims (3)
1, a kind of combustion chamber of piston engine, this reciprocating engine comprises piston 1, cylinder wall 3, cylinder head 4 and main combustion chamber 7, it is characterized in that, described firing chamber is made up of main combustion chamber 7 and additional circular crosssection compression chamber 8, press chamber 8 to surround by piston 1, cylinder head 4 and/or cylinder wall 3, when piston was in top dead center, the compression chamber volume was zero, and one group of passage 6 is communicated with compression chamber 8 and main combustion chamber 7.
2, firing chamber according to claim 1 is characterized in that, piston 1 is provided with ring-shaped step or boss 2, and cylinder head 4 or cylinder wall 3 are provided with annular boss or groove 5, and passage 6 is located on piston 1 or the cylinder head 4.
3, firing chamber according to claim 1 and 2 is characterized in that, it can be used for various reciprocating engine such as two-stroke, four-stroke and six-stroke.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91105081 CN1069098A (en) | 1991-07-27 | 1991-07-27 | Combustion chamber of piston engine |
| FR9209330A FR2680545A1 (en) | 1991-07-27 | 1992-07-23 | Combustion chamber with turbulent jets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91105081 CN1069098A (en) | 1991-07-27 | 1991-07-27 | Combustion chamber of piston engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1069098A true CN1069098A (en) | 1993-02-17 |
Family
ID=4906967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91105081 Pending CN1069098A (en) | 1991-07-27 | 1991-07-27 | Combustion chamber of piston engine |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1069098A (en) |
| FR (1) | FR2680545A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114607522A (en) * | 2022-03-18 | 2022-06-10 | 潍柴动力股份有限公司 | Combustion system and engine |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LT4031B (en) | 1995-12-13 | 1996-08-26 | Serlat Vladislav Stanislav | The combustion chamber with turbulent jets characterised by diminution of work hardness, particularly for diesel engines |
| GR20080100240A (en) * | 2008-04-09 | 2009-11-19 | Διονυσιος Χαραλαμπους Χοϊδας | Protection method of the flange of the head of a reciprocating internal combustion engine. |
-
1991
- 1991-07-27 CN CN 91105081 patent/CN1069098A/en active Pending
-
1992
- 1992-07-23 FR FR9209330A patent/FR2680545A1/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114607522A (en) * | 2022-03-18 | 2022-06-10 | 潍柴动力股份有限公司 | Combustion system and engine |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2680545A1 (en) | 1993-02-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination |