CN1016003B - Contact channel of diesel engine toroidal swiral chamber - Google Patents
Contact channel of diesel engine toroidal swiral chamberInfo
- Publication number
- CN1016003B CN1016003B CN 89105395 CN89105395A CN1016003B CN 1016003 B CN1016003 B CN 1016003B CN 89105395 CN89105395 CN 89105395 CN 89105395 A CN89105395 A CN 89105395A CN 1016003 B CN1016003 B CN 1016003B
- Authority
- CN
- China
- Prior art keywords
- chamber
- diesel engine
- passage
- combustion 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.)
- Expired
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Images
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
- 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
Landscapes
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
The present invention relates to a connecting passage for the swirl combustion chamber of a diesel engine. The passage presents a reducing variable cross section shape from up to down along the length direction of the passage, and the mixing areas in a swirl chamber and a main combustion chamber are enlarged; simultaneously, the collision and the blowing of the fuel gas in the main combustion chamber to the cylinder wall are alleviated, so that the gas flow loss is reduced, the mixing process and the combustion process of fuel oil and air are improved, the specific fuel consumption of the diesel engine is reduced, the smoke intensity and NO-[x] ingredients are reduced, and the mean effective pressure Pe of the diesel engine is also enhanced.
Description
The present invention relates to the connecting passage of Swirl Chamber Diesel Engine.
The connecting passage of turbulence chamber has multiple shape at present, and as Fig. 2, Fig. 3 flat key type and beans shape etc., its each section is that uniform section is long-pending, and their major defect is that the uniformity of fuel and air mixing is relatively poor.Apply for a patent in CN86105755 number of on February 7 disclosed being entitled as in 1988 " inserted block for votex combustion chamber " and to disclose a kind of connecting passage shape, in the major diameter direction is the sectional shape of flaring from top to bottom, though it can reduce the energy loss of fluid, but the uniformity of fuel and air mixing is still relatively poor, therefore, the mean effective pressure of diesel engine is lower, easy over-emitting black exhaust during high load.
The present invention's purpose is for the Economy of improving swirl chamber diesel and power character, reduces the specific fuel consumption of diesel engine; With the mean effective pressure that improves diesel engine; Reduce exhaust smoke and toxic gas NOX.
The present invention's technical solution is: for improving fuel and air mixing uniformity and reducing the gas flow loss, the present invention has improved vortex chamber's channel shape, its structure is seen Fig. 4, this passage penetratingly is arranged in the swirl-chamber insert, it is suitable for reading to be communicated with the vortex chamber, end opening is communicated with main combustion chamber, the shape of cross section of this passage has a major diameter and minor axis, the width of described minor axis direction remains unchanged to end opening from suitable for reading, to the end opening convergent, passage sectional area suitable for reading is greater than the end opening sectional area from suitable for reading for the width of major diameter direction that it is characterized in that described channel cross-section shape.
After adopting said structure, in the diesel engine compression stroke, owing to compressed air stream produces eddy motion along the passage (2) of flaring from the space, vortex chamber that enters suitable for reading, make the fuel that sprays in the vortex chamber can be in bigger space range and air mixing, so the uniformity of mixed gas improve in the vortex chamber.In combustion process, the imperfect combustion fuel oil of spent mixed gas Buddhist monk is then along the passage (2) of convergent in the vortex chamber, from end opening can be more concentrated spray to main combustion chamber, and enter in the main combustion chamber (3) along the groove of piston fork, it has enlarged the secondary mixed area in the main combustion chamber (3) on the one hand, and air-flow is to the impact and the purge of cylinder (5) wall when alleviating simultaneously outlet again.Diesel engine specific fuel consumption ge is descended, and mean effective pressure pe improves, and exhaust emission pollution lowers.But its manufacturing is more complicated than uniform section passage.
Below in conjunction with accompanying drawing the present invention is described in detail as follows:
Fig. 1 is common Swirl Chamber Diesel Engine structural drawing.
Fig. 2 is common Swirl Chamber Diesel Engine flat key shape connecting passage.
Fig. 3 is common Swirl Chamber Diesel Engine beans shape connecting passage.
Fig. 4 is the embodiment of turbulence chamber connecting passage of the present invention.
Fig. 5 is the sectional shape of turbulence chamber connecting passage of the present invention.
Fig. 1 shows that Swirl Chamber Diesel Engine is made up of two-part, and top (1) is the vortex chamber, and it is combined by cylindrical body and spheroid.The bottom is a main combustion chamber, and it is made up of the flattened cylindrical body bulk (3) of groove on the piston (4) and cylinder (5), and the groove on the piston plays guide functions.Connecting passage (2) penetratingly is arranged in the swirl-chamber insert (6), and the vortex chamber is communicated with main combustion chamber, in the compression stroke, high-pressure air enters vortex chamber (1) by main combustion chamber through this passage (2) and forms organized eddy motion, the diesel oil droplet that sprays into can be evenly distributed in the space, vortex chamber, yet, channel exit is because of being subjected to the restriction of strength of vortex, its channel outlet area can not be very big, therefore main eddy motion can only form in the sub-fraction space of vortex chamber, so fuel and Air mixing are even inadequately in the vortex chamber.After fuel catches fire in the vortex chamber, combustion process begins, high temperature, pressurized gas are through this passage (2), spray into main combustion chamber (3), make the air in the still unburned fuel and main combustion chamber carry out mixing the second time, so that fuel is able to abundant burning, high velocity air produces strong throttling and consumed energy through this passage simultaneously.This shows that the structural type of connecting passage is to the formation of mixed gas and burning, play an important role to effective utilization of energy.
Fig. 2, Fig. 3 passage (2) shape of cross section have flat key shape and beans shape, and its each cross section is a homalographic, and promptly its major diameter and minor axis all equate in each cross section.Channel shape of the present invention is seen Fig. 4 and Fig. 5, it is suitable for reading to be communicated with vortex chamber (1), end opening is communicated with main combustion chamber (3), the shape of cross section of this passage has a major diameter and minor axis, the width of described minor axis B direction remains unchanged to end opening from suitable for reading, to the end opening convergent, last open area is greater than following open area from suitable for reading for the width of major diameter L direction.Because open area is big on the passage, and compressed air stream enters the space, vortex chamber along the flaring passage, air-flow is diffusion type, thereby enlarged the area of space of main eddy current, fuel oil is mixed in bigger space, vortex chamber with main eddy motion, thereby fuel and Air mixing are more even, adopt the runner of flaring that restriction loss is reduced simultaneously.In combustion process, the fuel oil that the burnt gas Buddhist monk is imperfect combustion more sprays to main combustion chamber (3) in the concentrated area along the passage (2) of convergent, and effectively cooperate with diversion groove on the piston (4), their forks are imported flat main combustion chamber space (3), enlarge the blending space zone second time in the main combustion chamber (3) on the one hand, can alleviate behind the flow outlet bump again with cylinder wall (5), so both can improve the uniformity of air mixing in do not catch fire as yet fuel and the main combustion chamber, fuel oil is fully burned, can reduces the throttling and the bump loss of fluid simultaneously again.Because burnt gas flows to the outflow that main combustion chamber also can suppress gas along the passage of convergent, can reduce the pressure build-up rate in the main combustion chamber like this, promptly dp/de can reduce, and makes diesel engine work more soft.Owing to improved the uniformity of mixed gas, make fuel oil be able to abundant burning, thereby improve the Economy of diesel engine, so the specific fuel consumption ge of diesel engine can reduce.Owing to enlarged the first time and secondary mixed area.The air utilization ratio of diesel engine is improved, thereby can improves the mean effective pressure pe of diesel engine, simultaneously the smoke intensity during high load is reduced.
Passage of the present invention can be made with machining process, and it will increase by a convergent mouth manufacturing procedure than prismatic passage, if adopt the method for precision casting to make this passage, then processing technology can be simplified.
The present invention verifies on S195 diesel engine and S1100 diesel engine, diesel engine calibration point, sub load specific fuel consumption ge than low 2～5 grams of uniform section passage/horsepower-hour, mean effective pressure pe increases, the specific fuel consumption and the smoke intensity of busy hour all descend.
Claims (1)
1, the connecting passage of Swirl Chamber Diesel Engine, this passage penetratingly is arranged in the swirl-chamber insert, it is suitable for reading to be communicated with the vortex chamber, end opening is communicated with main combustion chamber, the shape of cross section of this passage has a major diameter and minor axis, the width of described minor axis direction remains unchanged to end opening from suitable for reading, and to the end opening convergent, passage sectional area suitable for reading is greater than the end opening sectional area from suitable for reading for the width of major diameter direction that it is characterized in that described channel cross-section shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89105395 CN1016003B (en) | 1989-02-13 | 1989-02-13 | Contact channel of diesel engine toroidal swiral chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89105395 CN1016003B (en) | 1989-02-13 | 1989-02-13 | Contact channel of diesel engine toroidal swiral chamber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1040076A CN1040076A (en) | 1990-02-28 |
| CN1016003B true CN1016003B (en) | 1992-03-25 |
Family
ID=4856157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89105395 Expired CN1016003B (en) | 1989-02-13 | 1989-02-13 | Contact channel of diesel engine toroidal swiral chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1016003B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005121522A1 (en) * | 2004-06-10 | 2005-12-22 | Ichiro Kamimura | Independent combustion chamber-type internal combustion engine |
-
1989
- 1989-02-13 CN CN 89105395 patent/CN1016003B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1040076A (en) | 1990-02-28 |
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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 | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |