CN203296950U - Pool-shaped combustion chamber of diesel engine using natural gas as fuel - Google Patents
Pool-shaped combustion chamber of diesel engine using natural gas as fuel Download PDFInfo
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- CN203296950U CN203296950U CN2013202292876U CN201320229287U CN203296950U CN 203296950 U CN203296950 U CN 203296950U CN 2013202292876 U CN2013202292876 U CN 2013202292876U CN 201320229287 U CN201320229287 U CN 201320229287U CN 203296950 U CN203296950 U CN 203296950U
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- combustion chamber
- natural gas
- diesel engine
- pool
- firing chamber
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Abstract
The utility model discloses a pool-shaped combustion chamber of a diesel engine using natural gas as fuel. The pool-shaped combustion chamber is characterized in that a combustion chamber is positioned at the center of the upper part of a piston body, the bottom of the combustion chamber is in a flat-surface round-pool shape, the diameter W of the combustion chamber is 78mm, the height H of the combustion chamber is 19.5mm, the top surface of the combustion chamber and the upper surface of a wall surface are in transition in a way that an arc-length radius R1 is 3mm, and the bottom surface of the combustion chamber and the wall surface are in transition in a way that the arc-length radius R2 is 5mm; a valve reserved clearance h which is reserved on the top part of the piston body is 0.3-0.4mm, and a compression space of the diesel engine is formed by the valve reserved clearance and the combustion chamber together. According to the pool-shaped combustion chamber disclosed by the utility model, the requirements on a compression ratio of the diesel engine using a natural gas engine can be met, and a detonation and vibration phenomenon of a spark-ignition natural gas engine due to too-high compression ratio cannot be caused on the premise of ensuring the dynamic performance requirements of the spark-ignition natural gas engine; according to the pool-shaped combustion chamber, the same dynamic performance of the natural gas engine and the diesel engine is ensured, the emission is lower, and the national IV emission standard can be met by the whole engine.
Description
Technical field
The utility model belongs to internal-combustion engine technology, is specifically related to the pond that acts as a fuel with rock gas type piston combustion bowl.
Background technique
Due to the needs of environmental protection, the impact that environment is caused for reducing motor vehicle exhaust emission, strict automobile emission regulation has been formulated in countries in the world.Under identical rules, because natural gas engine more easily meets emission request, the complete machine cost is also low, so the relative bavin of rock gas, the cheap natural gas engine of gas price have obtained application more and more widely simultaneously.In densely populated big city, the motor of many full-sized buses all uses rock gas to act as a fuel.But a present quite a lot of part is used the bus of natural gas engine, is all on original diesel engine basis, after related components is improved, puts into operation.The special requirement that acts as a fuel in order to adapt to rock gas, most important improvement are exactly by the original compression-ignited Spark ignition type that changes into by the combustion manner of motor.Just need to improve the structure of original burning chamber of diesel engine, the technical solution of the utility model proposes with regard to being aimed at this specific (special) requirements, to meet the characteristic requirements of motor Spark ignition type combustion manner for this reason.
Summary of the invention
The purpose of this utility model is, a kind of engine piston combustion chamber of pool-type structure is provided, and changes the original combustion manner of diesel engine, to adapt to the needs with the Ignition Natural Gas Engine normal operation.
Below in conjunction with accompanying drawing, theory and structure of the present utility model is explained.，Qi firing chamber, shape firing chamber, diesel engine pond take rock gas as fuel is positioned at the piston body central upper portion, and the bottom, firing chamber is the plane round pond shape.Firing chamber diameter W=78 ± 0.05mm, height H=19.5 ± 0.1mm.The firing chamber end face and above wall with arc length radius R 1=3mm transition, bottom surface, firing chamber and wall are with arc length radius R 2=5mm transition.Owing to there being valve overlap, during work, for fear of valve and piston head, collide, at piston head, be provided with the reserved clearance space of valve, the reserved clearance of valve has formed the compression volume of natural gas engine together with firing chamber, guarantee the rational compression clearance of motor, make rock gas fully mix postignition with air.
The beneficial effect of characteristics of the present utility model and generation is: firing chamber has met diesel engine and has used the requirement of natural gas engine to compression ratio instead, guaranteeing under the prerequisite that the Ignition Natural Gas Engine power character requires, can not cause because compression ratio is too high that motor produces phenomenon of detonation.Shape firing chamber, pond has guaranteed that natural gas engine and diesel engine have the power performance that is equal to, and discharging simultaneously is lower, makes complete machine meet state's four emission standards.
The accompanying drawing explanation
Fig. 1 the utility model structural principle sectional drawing.
Fig. 2 the utility model structure plan view.
Embodiment
Referring to accompanying drawing, also in conjunction with specific embodiments structure of the present utility model is further described.Firing chamber is positioned at piston body 1 central upper portion, bottom, firing chamber 2 is the plane round pond shape, firing chamber diameter W=78 ± 0.05mm, height H=19.5 ± 0.1mm, the firing chamber end face and above wall with arc length radius R 1=3mm transition, bottom surface, firing chamber and wall are with arc length radius R 2=5mm transition.The valve that the piston body top is left is reserved clearance h=0.4mm, and the reserved clearance of valve forms the compression volume of diesel engine together with firing chamber.
Embodiment is natural gas engine, combustion chamber volume 92.38ml.The pool-type structure of firing chamber can be supplied with rock gas, gas handling system matches, and makes mixed gas obtain rational premixing.The electronics of supplying with by rock gas is simultaneously accurately controlled, and has guaranteed the reasonable concentration of mixed gas, and mixed gas, after spark ignitor, effectively avoids occurring detonation and surface ignition phenomenon, has guaranteed power character and the economical index of motor.
The utility model is verified enforcement on the CY4102-N4A natural gas engine, engine calibration power 88kW/ 2800 r/min, moment of torsion 343N.m, emission level meet state's four limit values of GB17691-2005 standard code, delivery temperature≤700 ℃, noise level limit≤116 dB(A).With diesel engine, compare, substantially without the PM discharging, CO and NMHC discharging are also far below diesel emission.
Claims (2)
1. the shape firing chamber, diesel engine pond take rock gas as fuel, it is characterized in that firing chamber is positioned at piston body (1) central upper portion, bottom, firing chamber (2-4) is the plane round pond shape, firing chamber diameter W=78 ± 0.05mm, height H=19.5 ± 0.1mm, the firing chamber end face and above wall with arc length radius R 1=3mm transition, bottom surface, firing chamber and wall are with arc length radius R 2=5mm transition.
2. according to the shape firing chamber, diesel engine pond take rock gas as fuel claimed in claim 1, it is characterized in that the valve that leaves at described piston body (1) top reserves clearance h=0.3-0.4mm, the reserved clearance of valve forms the compression volume of diesel engine together with firing chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202292876U CN203296950U (en) | 2013-04-29 | 2013-04-29 | Pool-shaped combustion chamber of diesel engine using natural gas as fuel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202292876U CN203296950U (en) | 2013-04-29 | 2013-04-29 | Pool-shaped combustion chamber of diesel engine using natural gas as fuel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203296950U true CN203296950U (en) | 2013-11-20 |
Family
ID=49572964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202292876U Expired - Lifetime CN203296950U (en) | 2013-04-29 | 2013-04-29 | Pool-shaped combustion chamber of diesel engine using natural gas as fuel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203296950U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106536889A (en) * | 2014-07-19 | 2017-03-22 | 道依茨股份公司 | Combustion method |
-
2013
- 2013-04-29 CN CN2013202292876U patent/CN203296950U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106536889A (en) * | 2014-07-19 | 2017-03-22 | 道依茨股份公司 | Combustion method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Pool-shaped combustion chamber of diesel engine using natural gas as fuel Effective date of registration: 20190612 Granted publication date: 20131120 Pledgee: LINGYUAN IRON & STEEL GROUP CO.,LTD. Pledgor: DONGFENG CHAOYANG DIESEL Co.,Ltd. Registration number: 2019210000021 |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131120 |