CN103868659A - Leakage testing method for sealing property of cylinder cover oil atomizer copper bush - Google Patents
Leakage testing method for sealing property of cylinder cover oil atomizer copper bush Download PDFInfo
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- CN103868659A CN103868659A CN201310750428.3A CN201310750428A CN103868659A CN 103868659 A CN103868659 A CN 103868659A CN 201310750428 A CN201310750428 A CN 201310750428A CN 103868659 A CN103868659 A CN 103868659A
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- cylinder
- copper sheathing
- freezing solution
- oil return
- anti freezing
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Abstract
The invention discloses a leakage testing method for the sealing property of a cylinder cover oil atomizer copper bush. The method comprises the following steps of observing the oil return condition of an oil return connection pipe in each cylinder respectively at the moment of starting the diesel engine and increasing the rotating speed and at the moment of halting, wherein if antifreezing solution exists in an oil return connection pipe of a cylinder at the starting of the diesel engine, and the oil level falls after halting, judging the cylinder as a fault cylinder, of which the water path of the cylinder cover is communicated with a diesel path; removing an oil atomizer and a high-pressure connecting pipe of the fault cylinder, starting the diesel engine and properly increasing the rotating speed, observing the leakage position of the oil atomizer copper bush of the fault cylinder, and determining the reason of the fault; if the antifreezing solution leaks from an outer ring of the upper end of the copper bush, judging that the copper bush is deformed or the O-shaped ring of the copper bush is trimmed; if the antifreezing solution leaks from the other parts of the copper bush, judging that the copper bush is cracked. By starting and stopping the diesel engine, in the circumstance that the cylinder cover is not removed, the fault point of the cylinder cover is determined correctly, the reason of the fault can be quickly diagnosed at the spot, the cylinder cover does not need to be subjected to leakage test by taking the cylinder cover back in a factory, and thus the efficiency of the fault analysis is improved.
Description
Technical field
The present invention relates to engine art, particularly a kind of cylinder cap fuel injector copper sheathing sealing leak testing process.
Background technology
In the time finding that diesel engine anti freezing solution lacks, the after-sales service personnel of producer check the diesel colour in fuel tank conventionally at the scene, if there is bottle green in fuel tank, be the color of anti freezing solution, tentatively be judged as that cylinder head copper sheathing splits or the trimming of O type circle, cylinder head water cavity and diesel oil drainback passage are communicated with, and anti freezing solution seepage enters fuel tank.Because scene does not have leakage test device for cylinder cap, the after-sales service personnel of producer cannot carry out leak test to cylinder head and confirm fault, can only change cylinder head and checking is followed the tracks of by scene, and real failure cause need to be beamed back the cylinder head of pulling down general headquarters and carries out the confirmation of professional leak test-ability.
But it is no problem through leak test that cylinder head is got back to general headquarters, and cylinder head gets back to general headquarters and needs the time cycle longer from scene, causes failure reason analysis and rectification scheme to formulate and can not carry out in time.
Summary of the invention
The present invention is in order to overcome defect in above-mentioned prior art, judge that by removing diesel injector oil return house steward and starting diesel engine the water channel of which cylinder communicates with diesel oil road, then removes this cylinder injector and high-pressure connecting pipe starting engine and determines concrete failure cause.
For achieving the above object, the invention provides a kind of cylinder cap fuel injector copper sheathing sealing leak testing process, comprise the steps: in the time starting diesel engine and improve rotating speed and shut down, to observe respectively the oil return situation that each cylinder oil return is taken over, if the oil return in the time starting diesel engine of certain cylinder has anti freezing solution to overflow and falls after rise after shutdown in taking over, judge that this cylinder is Cylinder, the water channel of its cylinder head communicates with diesel oil road; Pull down fuel injector and the high-pressure connecting pipe of Cylinder, start diesel engine and suitably improve rotating speed, observe the seepage position of Cylinder copper bush of fuel injector, determine failure cause; If anti freezing solution from copper sheathing upper end cylindrical seepage, is judged copper sheathing distortion or the trimming of copper sheathing O type circle; If anti freezing solution from other position seepages of copper sheathing, is judged copper sheathing cracking.In the situation that not pulling down cylinder head, correct diagnosis is made in the trouble spot of cylinder head by starting and stop diesel engine, can draw fast at the scene failure cause, change and return factory's leak test without cylinder head, having improved fault analysis efficiency, having shortened Maintenance Demand Time.
In technique scheme, judging after Cylinder, in expansion tank, adding anti freezing solution, if Cylinder oil return has anti freezing solution and overflows in taking over, confirming that the water channel of the cylinder head of Cylinder communicates with diesel oil road.In expansion tank, add anti freezing solution to observe anti freezing solution in oil return adapter and have situation, further confirm Cylinder, for accurately finding failure cause to provide safeguard.
The present invention also provides a kind of cylinder cap fuel injector copper sheathing sealing leak testing process, comprise the steps: to add in expansion tank anti freezing solution, observe the pasta variation that each cylinder oil return is taken over, if certain cylinder oil return has anti freezing solution and overflows in taking over, judge that this cylinder is Cylinder, the water channel of its cylinder head communicates with diesel oil road; Pull down fuel injector and the high-pressure connecting pipe of Cylinder, start diesel engine and suitably improve rotating speed, observe the seepage position of Cylinder copper bush of fuel injector, determine failure cause; If anti freezing solution from copper sheathing upper end cylindrical seepage, is judged copper sheathing distortion or the trimming of copper sheathing O type circle; If anti freezing solution from other position seepages of copper sheathing, is judged copper sheathing cracking.In the time that anti freezing solution seepage is serious, by directly carrying out failure judgement cylinder toward adding anti freezing solution in expansion tank, can not have a negative impact to the cylinder not breaking down, and simple and quick, improve maintenance efficiency.
accompanying drawing explanation
Fig. 1 is the process flow diagram of cylinder cap fuel injector copper sheathing sealing leak testing process of the present invention.
Embodiment
Below the specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention is not subject to the restriction of embodiment.
Cylinder cap fuel injector copper sheathing sealing leak testing process of the present invention comprises the steps:
1, observe the oil return situation that each cylinder oil return takes over when starting and stop diesel engine and judge the Cylinder that the water channel of its cylinder head communicates with diesel oil road.
Remove at the scene diesel injector oil return house steward, start diesel engine and suitably improve rotating speed, observe the oil return situation that each cylinder injector oil return is taken over.If finding has anti freezing solution (general anti freezing solution is bottle green, is easier to differentiate) in the oil return of certain cylinder, the pasta that after shutting down, oil return is taken over simultaneously falls after rise, tentatively judges that the water channel of this cylinder communicates with diesel oil road.
2, alternatively, can after above-mentioned steps, in expansion tank, add anti freezing solution to observe the variation in oil return adapter, communicate with diesel oil road with the water channel of confirming this cylinder.
If oil return adapter has anti freezing solution and overflows after adding anti freezing solution toward expansion tank, confirm that the water channel of this cylinder cylinder head communicates with diesel oil road.
If diesel engine anti freezing solution lacks serious, can directly in expansion tank, add water, observe the pasta variation that each cylinder oil return is taken over, if the oil return of certain cylinder adapter has anti freezing solution and overflows after expansion tank adds anti freezing solution, judge that the water channel of this cylinder cylinder head communicates with diesel oil road.Because seepage is serious, taking over pasta toward the oil return of Cylinder after adding water in expansion tank can fast rise and overflow, and therefore, judges without starting and stopping diesel engine.
3, judge concrete leakage cause.
Under stopped status, pull down fuel injector and the high-pressure connecting pipe of Cylinder, start diesel engine and suitably improve rotating speed, observe the seepage position of Cylinder copper bush of fuel injector.
If anti freezing solution from copper sheathing upper end cylindrical seepage, is judged copper sheathing distortion or the trimming of copper sheathing O type circle; If anti freezing solution, from other position seepages of copper sheathing, as sidewall, is judged copper sheathing cracking.
Cylinder cap fuel injector copper sheathing sealing leak testing process of the present invention is made correct diagnosis to the trouble spot of cylinder head in the situation that not pulling down cylinder head, the quick diagnosis reason that is out of order at the scene, return factory's leak test without dismounting cylinder head, improve fault analysis efficiency, shortened Maintenance Demand Time.
Disclosed is above only a specific embodiment of the present invention, and still, the present invention is not limited thereto, and the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (3)
1. a cylinder cap fuel injector copper sheathing sealing leak testing process, is characterized in that, comprises the steps:
In the time starting diesel engine and improve rotating speed and shut down, observe respectively the oil return situation that each cylinder oil return is taken over, if the oil return in the time starting diesel engine of certain cylinder has anti freezing solution to overflow and falls after rise after shutdown in taking over, judge that this cylinder is Cylinder, the water channel of its cylinder head communicates with diesel oil road;
Pull down fuel injector and the high-pressure connecting pipe of Cylinder, start diesel engine and suitably improve rotating speed, observe the seepage position of Cylinder copper bush of fuel injector, determine failure cause;
If anti freezing solution from copper sheathing upper end cylindrical seepage, is judged copper sheathing distortion or the trimming of copper sheathing O type circle; If anti freezing solution from other position seepages of copper sheathing, is judged copper sheathing cracking.
2. cylinder cap fuel injector copper sheathing sealing leak testing process according to claim 1, it is characterized in that, judging after Cylinder, in expansion tank, add anti freezing solution, if Cylinder oil return has anti freezing solution and overflows in taking over, confirm that the water channel of the cylinder head of Cylinder communicates with diesel oil road.
3. a cylinder cap fuel injector copper sheathing sealing leak testing process, is characterized in that, comprises the steps:
In expansion tank, add anti freezing solution, observe the pasta variation that each cylinder oil return is taken over, if certain cylinder oil return has anti freezing solution and overflows in taking over, judge that this cylinder is Cylinder, the water channel of its cylinder head communicates with diesel oil road;
Pull down fuel injector and the high-pressure connecting pipe of Cylinder, start diesel engine and suitably improve rotating speed, observe the seepage position of Cylinder copper bush of fuel injector, determine failure cause;
If anti freezing solution from copper sheathing upper end cylindrical seepage, is judged copper sheathing distortion or the trimming of copper sheathing O type circle; If anti freezing solution from other position seepages of copper sheathing, is judged copper sheathing cracking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310750428.3A CN103868659B (en) | 2013-12-31 | 2013-12-31 | A kind of cylinder cap fuel injector copper sheathing sealing leak testing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310750428.3A CN103868659B (en) | 2013-12-31 | 2013-12-31 | A kind of cylinder cap fuel injector copper sheathing sealing leak testing process |
Publications (2)
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| CN103868659A true CN103868659A (en) | 2014-06-18 |
| CN103868659B CN103868659B (en) | 2016-05-25 |
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| CN201310750428.3A Active CN103868659B (en) | 2013-12-31 | 2013-12-31 | A kind of cylinder cap fuel injector copper sheathing sealing leak testing process |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104344952A (en) * | 2014-11-18 | 2015-02-11 | 武汉船用机械有限责任公司 | Horizontal pressure testing method for shafting copper bush of controllable-pitch propeller |
| CN105840380A (en) * | 2016-03-09 | 2016-08-10 | 广西玉柴机器股份有限公司 | Detecting and judging method for leakproofness of oil injector |
| CN109029852A (en) * | 2018-07-27 | 2018-12-18 | 广西玉柴机器股份有限公司 | A kind of simplicity blocking film hole leak testing process and tooling |
| CN114088373A (en) * | 2021-11-24 | 2022-02-25 | 临沂市金立机械有限公司 | Intelligent detection method and device for copper bush press fitting |
| CN109029852B (en) * | 2018-07-27 | 2024-05-03 | 广西玉柴机器股份有限公司 | Simple and convenient plugging hole leakage test method and tool |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1186775A2 (en) * | 2000-09-07 | 2002-03-13 | Cummins Engine Company, Ltd. | Method for detecting leakage in a fuel rail |
| CN1746647A (en) * | 2004-09-09 | 2006-03-15 | 扬动股份有限公司 | Inspection of cylinder cap leakage of diesel engine |
| US20070157714A1 (en) * | 2006-01-10 | 2007-07-12 | Honda Motor Co., Ltd. | Engine oil leak test system and method |
| CN101210531A (en) * | 2006-12-30 | 2008-07-02 | 广西玉柴机器股份有限公司 | Cylinder cap fuel injector copper sheathing pressure-mounting method |
| CN101556202A (en) * | 2008-04-11 | 2009-10-14 | 广西玉柴机器股份有限公司 | Copper bush simulation testing device of oil injector hole of diesel engine cylinder cover and testing method thereof |
| CN201532290U (en) * | 2009-11-20 | 2010-07-21 | 潍柴动力股份有限公司 | Detection device for checking tightness of common-rail fuel injectors and copper bushes |
-
2013
- 2013-12-31 CN CN201310750428.3A patent/CN103868659B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1186775A2 (en) * | 2000-09-07 | 2002-03-13 | Cummins Engine Company, Ltd. | Method for detecting leakage in a fuel rail |
| CN1746647A (en) * | 2004-09-09 | 2006-03-15 | 扬动股份有限公司 | Inspection of cylinder cap leakage of diesel engine |
| US20070157714A1 (en) * | 2006-01-10 | 2007-07-12 | Honda Motor Co., Ltd. | Engine oil leak test system and method |
| CN101210531A (en) * | 2006-12-30 | 2008-07-02 | 广西玉柴机器股份有限公司 | Cylinder cap fuel injector copper sheathing pressure-mounting method |
| CN101556202A (en) * | 2008-04-11 | 2009-10-14 | 广西玉柴机器股份有限公司 | Copper bush simulation testing device of oil injector hole of diesel engine cylinder cover and testing method thereof |
| CN201532290U (en) * | 2009-11-20 | 2010-07-21 | 潍柴动力股份有限公司 | Detection device for checking tightness of common-rail fuel injectors and copper bushes |
Non-Patent Citations (2)
| Title |
|---|
| 王丽 等: "引起发动机气缸盖密封质量下降的原因探讨", 《内燃机》 * |
| 马慧斌 等: "柴油机气缸盖喷油器铜套压装技术分析研究", 《装备制造技术》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104344952A (en) * | 2014-11-18 | 2015-02-11 | 武汉船用机械有限责任公司 | Horizontal pressure testing method for shafting copper bush of controllable-pitch propeller |
| CN105840380A (en) * | 2016-03-09 | 2016-08-10 | 广西玉柴机器股份有限公司 | Detecting and judging method for leakproofness of oil injector |
| CN109029852A (en) * | 2018-07-27 | 2018-12-18 | 广西玉柴机器股份有限公司 | A kind of simplicity blocking film hole leak testing process and tooling |
| CN109029852B (en) * | 2018-07-27 | 2024-05-03 | 广西玉柴机器股份有限公司 | Simple and convenient plugging hole leakage test method and tool |
| CN114088373A (en) * | 2021-11-24 | 2022-02-25 | 临沂市金立机械有限公司 | Intelligent detection method and device for copper bush press fitting |
| CN114088373B (en) * | 2021-11-24 | 2022-11-18 | 临沂市金立机械有限公司 | Intelligent detection method and device for copper bush press fitting |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103868659B (en) | 2016-05-25 |
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