CN103868659B - A kind of cylinder cap fuel injector copper sheathing sealing leak testing process - Google Patents
A kind of cylinder cap fuel injector copper sheathing sealing leak testing process Download PDFInfo
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- CN103868659B CN103868659B CN201310750428.3A CN201310750428A CN103868659B CN 103868659 B CN103868659 B CN 103868659B CN 201310750428 A CN201310750428 A CN 201310750428A CN 103868659 B CN103868659 B CN 103868659B
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- cylinder
- copper sheathing
- icing fluid
- fuel injector
- diesel engine
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Abstract
The invention discloses 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-icing fluid in taking over and pasta falling after shutdown, 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-icing fluid from copper sheathing upper end cylindrical seepage, is judged copper sheathing distortion or the trimming of copper sheathing O type circle; If anti-icing fluid 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 point of cylinder head by starting and stop diesel engine, quick diagnosis failure cause at the scene, without arranging cylinder head to return factory's leak test, has improved accident analysis efficiency.
Description
Technical field
The present invention relates to engine art, particularly a kind of cylinder cap fuel injector copper sheathing sealing leak test sideMethod.
Background technology
In the time finding that diesel engine anti-icing fluid lacks, the after-sales service personnel of producer check in fuel tank conventionally at the sceneDiesel colour, if there is bottle green in fuel tank, be the color of anti-icing fluid, be tentatively judged as gasCylinder cap copper sheathing cracking or the trimming of copper sheathing O type circle, be communicated with cylinder head water cavity and diesel oil drainback passage, anti-Freeze liquid seepage and enter fuel tank. Because scene does not have leakage test device for cylinder cap, the after-sales service personnel of producer cannotCylinder head is carried out to leak test and confirm fault, can only change cylinder head checking tracking by scene, and realFailure cause the cylinder head of pulling down need to be beamed back to general headquarters and carry out professional leak test-ability and confirm.
But it is no problem through leak test that cylinder head is got back to general headquarters, and cylinder head is got back to from sceneGeneral headquarters need the time cycle longer, cause 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, total by removing diesel injector oil returnManage and start diesel engine and judge that the water channel of which cylinder communicates with diesel oil road, then removes this cylinder injector and heightPress tube connector ato unit to determine concrete failure cause.
For achieving the above object, the invention provides a kind of cylinder cap fuel injector copper sheathing sealing leak testMethod, comprises the steps: in the time starting diesel engine and improve rotating speed and shut down, to observe respectively each cylinder oil returnThe oil return situation of taking over, if the oil return in the time starting diesel engine of certain cylinder has anti-icing fluid to overflow and is stopping in taking overAfter machine, fall after rise, judge that this cylinder is Cylinder, the water channel of its cylinder head communicates with diesel oil road; Pull down faultThe fuel injector of cylinder and high-pressure connecting pipe, start diesel engine and suitably improve rotating speed, observes Cylinder fuel injectorThe seepage position of copper sheathing, determines failure cause; If anti-icing fluid, from copper sheathing upper end cylindrical seepage, is judgedCopper sheathing distortion or the trimming of copper sheathing O type circle; If anti-icing fluid, from other position seepages of copper sheathing, is judged copperCover cracking. By starting and stop diesel engine trouble point to cylinder head in the situation that not pulling down cylinder headMake correct diagnosis, can draw fast at the scene failure cause, change and return factory's leak test without cylinder head,Improve accident analysis efficiency, shortened Maintenance Demand Time.
In technique scheme, judging after Cylinder, in expansion tank, adding anti-icing fluid, ifCylinder oil return has anti-icing fluid and overflows in taking over, and confirms water channel and the diesel oil road of the cylinder head of CylinderCommunicate. In expansion tank, add anti-icing fluid to observe anti-icing fluid in oil return adapter and have situation, further trueRecognize 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, comprises the steps:In expansion tank, add anti-icing fluid, observe the pasta variation that each cylinder oil return is taken over, if in certain cylinder oil return adapterHave anti-icing fluid and overflow, judging that this cylinder is Cylinder, the water channel of its cylinder head communicates with diesel oil road; Tear openThe fuel injector of lower Cylinder and high-pressure connecting pipe, start diesel engine and suitably improve rotating speed, observes CylinderThe seepage position of copper bush of fuel injector, determines failure cause; If anti-icing fluid is from copper sheathing upper end cylindrical seepage,Judge copper sheathing distortion or the trimming of copper sheathing O type circle; If anti-icing fluid is from other position seepages of copper sheathing,Judge copper sheathing cracking. In the time that anti-icing fluid seepage is serious by directly sentencing toward adding anti-icing fluid in expansion tankDisconnected Cylinder, can not have a negative impact to the cylinder not breaking down, and simple and quick, has improved dimensionRepair efficiency.
Brief description of the drawings
Fig. 1 is the flow chart of cylinder cap fuel injector copper sheathing sealing leak testing process of the present invention.
Detailed description of the invention
Below the specific embodiment of the present invention is described in detail, but is to be understood that protection of the present inventionScope is not subject to the restriction of detailed description of the invention.
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 its cylinder headThe Cylinder that communicates with diesel oil road of water channel.
Remove at the scene diesel injector oil return house steward, start diesel engine and suitably improve rotating speed, observeThe oil return situation that each cylinder injector oil return is taken over. In the oil return of certain cylinder, there is anti-icing fluid (generally antifreeze if foundLiquid is bottle green, is easier to differentiate), the pasta that after shutting down, oil return is taken over simultaneously falls after rise, and preliminary judgement shouldThe water channel of cylinder communicates with diesel oil road.
2, alternatively, can after above-mentioned steps, in expansion tank, add anti-icing fluid to observe in oil return adapterVariation, communicate with diesel oil road with the water channel of confirming this cylinder.
If oil return adapter has anti-icing fluid and overflows after adding anti-icing fluid toward expansion tank, confirm this cylinder gasThe water channel of cylinder cap communicates with diesel oil road.
If diesel engine anti-icing fluid lacks serious, can directly in expansion tank, add water, observe each cylinder and returnThe pasta that oil is taken over changes, if the oil return of certain cylinder adapter has anti-icing fluid after expansion tank adds anti-icing fluidAnd overflow, judge that the water channel of this cylinder cylinder head communicates with diesel oil road. Because seepage is serious, toward swelling waterAfter adding water in case, the oil return of Cylinder is taken over pasta meeting fast rise and overflows, therefore, and without starting and stoppingOnly diesel engine judges.
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 carryHigh rotating speed, the seepage position of observation Cylinder copper bush of fuel injector.
If anti-icing fluid from copper sheathing upper end cylindrical seepage, is judged copper sheathing distortion or the trimming of copper sheathing O type circle;If anti-icing fluid, 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 right in the situation that not pulling down cylinder headCorrect diagnosis is made in the trouble point of cylinder head, and the quick diagnosis reason that is out of order at the scene, without dismountingCylinder head is returned factory's leak test, has improved accident analysis efficiency, has shortened Maintenance Demand Time.
Disclosed is above only a specific embodiment of the present invention, and still, the present invention is not limited thereto,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 while shutdown, observe respectively the oil return feelings that each cylinder oil return is taken overCondition, if the oil return in the time starting diesel engine and improve rotating speed of certain cylinder has anti-icing fluid to overflow in taking over and is shutting downRear falling, judges that this cylinder is Cylinder, and 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, observeThe seepage position of Cylinder copper bush of fuel injector, determines failure cause;
If anti-icing fluid from copper sheathing upper end cylindrical seepage, is judged copper sheathing distortion or the trimming of copper sheathing O type circle;If anti-icing fluid 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, its feature existsIn, judging after Cylinder, in expansion tank, add anti-icing fluid, if in Cylinder oil return adapterThere is anti-icing fluid and overflow, confirming 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-icing fluid, observe the pasta variation that each cylinder oil return is taken over, if certain cylinder oil returnIn adapter, there is anti-icing fluid and overflow, judging that this cylinder is Cylinder, the water channel of its cylinder head and diesel oil road phaseLogical;
Pull down fuel injector and the high-pressure connecting pipe of Cylinder, start diesel engine and suitably improve rotating speed, observeThe seepage position of Cylinder copper bush of fuel injector, determines failure cause;
If anti-icing fluid from copper sheathing upper end cylindrical seepage, is judged copper sheathing distortion or the trimming of copper sheathing O type circle;If anti-icing fluid from other position seepages of copper sheathing, is judged copper sheathing cracking.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310750428.3A 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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| CN201310750428.3A 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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| CN103868659A CN103868659A (en) | 2014-06-18 |
| CN103868659B true CN103868659B (en) | 2016-05-25 |
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Families Citing this family (4)
| 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 |
| 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 |
| 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 |
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| 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 | Method for testing air tightness of cylinder body and cylinder cover of diesel engine |
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7347087B2 (en) * | 2006-01-10 | 2008-03-25 | Honda Motor Co., Ltd. | Engine oil leak test system and method |
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| 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 | Method for testing air tightness of cylinder body and cylinder cover of diesel engine |
| 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 |
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| CN103868659A (en) | 2014-06-18 |
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