CN107489575B - Multi-parameter measuring device and method for fuel injection performance of engine - Google Patents
Multi-parameter measuring device and method for fuel injection performance of engine Download PDFInfo
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- CN107489575B CN107489575B CN201710565904.2A CN201710565904A CN107489575B CN 107489575 B CN107489575 B CN 107489575B CN 201710565904 A CN201710565904 A CN 201710565904A CN 107489575 B CN107489575 B CN 107489575B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
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Abstract
The invention discloses a device and a method for measuring multiple parameters of fuel injection performance of an engine, wherein the device comprises a measuring plate, a crankshaft mounting hole, a crankshaft angle dial, a dial pointer, a fuel injector mounting hole, a fuel beam measuring scale mark and a camera device. The method solves the problems that the traditional method for measuring the fuel injection performance of the engine can only measure one of two parameters, but can not collect all the parameters in place, and has the disadvantages of various instruments, complex operation and high measurement cost. Has the advantages of multifunction, low cost, high efficiency, convenient and fast operation, etc.
Description
Technical Field
The invention relates to the field of piston engine oil injection performance parameter measurement, in particular to a device and a method for measuring oil injection performance parameters of a two-stroke aviation heavy oil piston engine.
Background
Two-stroke aviation heavy oil piston engines play a very important role in the fields of general aviation and unmanned aerial vehicles. The method for measuring the fuel injection performance of the engine in the prior art can only measure one of the two parameters, and a large amount of instruments and equipment are needed for measuring all the fuel injection performance parameters of the whole engine, so that the method is expensive in cost, complex and tedious in process, inconvenient to operate and low in measurement efficiency. Therefore, it is necessary to develop a measuring method capable of measuring multiple parameters of the fuel injection performance of the full two-stroke aviation heavy oil piston engine.
Although the traditional method for measuring the fuel injection performance parameters of the engine, such as the fuel injector opening time measuring equipment disclosed in the chinese utility model CN201110261378 can accurately determine the fuel injector opening time, other important fuel injection performance parameters such as the fuel injection advance angle and the like cannot be measured; as the oil injection law measuring method disclosed in patent CN201410248080, the oil injection quantity can be accurately measured, but the whole set of system components are numerous, and other oil injection performance parameters such as the oil beam injection penetration cannot be measured; the device for observing the oil injection condition of the diesel injector disclosed in patent CN201410429321 is provided with complex additional devices such as an exhaust fan and a spiral exhaust pipe, and the measured oil injection quality and the real oil injection condition of the engine have large errors.
Disclosure of Invention
Based on the technical problems of incomplete measurement of the fuel injection performance parameters of the engine, complex device, high cost and the like, the invention provides a device and a method for measuring the fuel injection performance parameters of a two-stroke aviation heavy oil piston engine. The designed multifunctional measuring plate can meet the requirement of multi-parameter measurement of oil injection performance, and compared with the traditional measuring method, the method has the advantages of multiple functions, low cost, high efficiency, convenience and quickness in operation and the like.
The complete technical scheme of the invention comprises the following steps:
the multi-parameter measuring device for the fuel injection performance of the engine comprises a measuring plate, a crankshaft mounting hole, a crankshaft corner dial, a dial indicator, a fuel injector mounting hole, a fuel bundle measuring scale mark and a camera device.
The measuring plate is provided with a crankshaft corner dial, a crankshaft mounting hole and an oil sprayer mounting hole, the crankshaft mounting hole is positioned in the center of the crankshaft corner dial and is mounted on the crankshaft through the crankshaft mounting hole, the crankshaft corner dial is concentric with the crankshaft, the crankshaft mounting hole is in clearance fit with the crankshaft of the engine, the crankshaft corner dial is provided with angle scales, a dial pointer is positioned in the mounting hole in the surface of the crankshaft and can rotate along with the crankshaft, and the crankshaft corner can be indicated by the dial pointer at once; the oil sprayer mounting hole is arranged on the oil sprayer, and the oil beam measuring scale mark is arranged on the measuring plate and is positioned at the position where each oil spraying hole is opposite to the outlet.
The scales on the crank angle dial are 360 scales by taking 1 degree as a unit.
The dial indicator and the surface mounting hole of the crankshaft are in interference fit.
The crankshaft of the engine is arranged on the left side of the measuring plate, and the oil injector is arranged on the right side of the measuring plate.
The important scales on the crank angle dial are represented by red, and preferably, the crank angle dial is the scales pointed by the dial pointer when the engine piston reaches the top dead center and the scales corresponding to the scales reaching 9 degrees, 12 degrees and 15 degrees before the top dead center.
The oil sprayer mounting hole is in small interference fit with the oil sprayer, the oil sprayer and the measuring plate form close fit and are vertical to the oil sprayer, and relative motion is avoided;
the distance measuring plate for the position of the oil spray hole of the oil sprayer after installation is 5 mm.
The number of the oil beam measuring scale marks is determined according to the number of the oil injection holes of the oil injector, and is preferably 4 or 5.
The oil beam measuring scale mark is 300mm long, the minimum scale is 1mm, and 0 scale is the position of the oil injection hole.
The surface of the measuring plate is subjected to sanding treatment.
The imaging device is a high-speed camera, and preferably, the high-speed camera can take 1000 frames in 1 second.
The method for measuring the oil injection performance parameters by using the multi-parameter measuring device for the oil injection performance of the engine is characterized in that the method for measuring the oil injection advance angle comprises the following steps: the measurement starts when the dynamometer reversely drags the engine speed to a certain speed, the whole fuel injection process of the fuel injector is recorded by the camera device, the fuel injection condition is observed in image processing software, and when the fuel beam appears at the outlet of a fuel injection hole of a certain frame for the first time, the included angle phi between the position of the dial indicator and the top dead center position is the fuel injection advance angle.
The certain rotating speed is 600 revolutions per minute.
The measuring method of the oil injection continuous angle is that the measuring starts when the dynamometer reversely drags the engine rotating speed to a certain rotating speed, the whole oil injection process of the oil injector is recorded by a camera device, the oil injection condition is observed in image processing software, and when a certain frame of oil beam starts to leave the outlet of the oil injection hole, the included angle △ phi between the position pointed by the dial indicator and the position of the oil injection advanced angle is the oil injection continuous angle.
The certain rotating speed is 600 revolutions per minute.
The oil injection penetration measuring method comprises the following steps: when the dynamometer reversely drags the engine to a first rotating speed, a second rotating speed and a third rotating speed, the whole fuel injection process of the fuel injector is recorded by the camera device respectively, the fuel injection condition of the corresponding rotating speed is observed in image processing software, when a certain frame of fuel bundle starts to leave the outlet of the fuel injection hole, the position where the starting end of the fuel bundle reaches the measurement scale line of the fuel bundle and the position where the tail end of the fuel bundle are located are recorded, and the scale difference L of the two positions represents the size of the penetration degree of the fuel injection.
Preferably, the first rotation speed is 600 rpm, the second rotation speed is 1800 rpm, and the third rotation speed is 2400 rpm.
The measuring method of the oil injection amount comprises the following steps: when the dynamometer reversely drags the engine to the first rotating speed, the second rotating speed and the third rotating speed, the whole oil injection process of the oil injector is recorded by the camera device respectively, the pixel area of the picture occupied by the oil beam when the oil beam leaves the oil injector at the corresponding rotating speed is calculated in the image processing software, and the oil injection quantity is determined according to the relation between the calibrated pixel area and the oil quantity.
Preferably, the first rotation speed is 600 rpm, the second rotation speed is 1800 rpm, and the third rotation speed is 2400 rpm.
The wide-angle measuring method for oil injection comprises the steps of respectively recording the whole oil injection process of an oil injector by using a camera when a dynamometer reversely drags the rotating speed of an engine to a first rotating speed, a second rotating speed and a third rotating speed, observing the shape of an oil bundle of the corresponding rotating speed in image processing software, and determining an included angle α between the upper boundary and the lower boundary of the oil bundle as a wide-angle oil injection angle.
Preferably, the first rotation speed is 600 rpm, the second rotation speed is 1800 rpm, and the third rotation speed is 2400 rpm.
The injection rate measuring method comprises the following steps: when the dynamometer reversely drags the engine to the first rotating speed, the second rotating speed and the third rotating speed, the whole fuel injection process of the fuel injector is recorded by the camera device respectively, and a certain T of the corresponding rotating speed is recorded in the image processing software1Scale value L of starting end of oil beam on scale mark at moment1And the next frame T2Scale value L of starting end of oil beam on scale mark at moment2The difference △ L between the two scales and the time interval △ T are used to calculate the injection rate at that moment.
Preferably, the first rotation speed is 600 rpm, the second rotation speed is 1800 rpm, and the third rotation speed is 2400 rpm.
The injection condition analysis method comprises the following steps: when the dynamometer reversely drags the engine to the first rotating speed, the second rotating speed and the third rotating speed, and the rotating angle of the plunger is respectively adjusted to the positions of the single-cylinder circulating oil quantity at the first oil quantity and the second oil quantity, the whole oil injection process of the oil injector in multiple cycles of the engine is recorded by the camera device, whether abnormal injection conditions such as secondary injection and secondary injection occur or not is observed in image processing software, whether the difference of the oil injection quantity of adjacent cycles meets the requirement or not can be measured when the secondary injection occurs, and whether the oil injection continuation angle and the oil injection penetration degree meet the requirement or not can be measured when the secondary injection occurs.
Preferably, the first rotation speed is 600 rpm, the second rotation speed is 1800 rpm, and the third rotation speed is 2400 rpm.
Preferably, the first amount of oil is 3mg and the second amount of oil is 12 mg.
Preferably, the plurality of cycles is 10 cycles.
Compared with the prior art, the invention has the advantages that:
(1) the multifunctional measuring plate simultaneously comprises the crank angle dial and the oil beam measuring scale mark, can be coupled with various measuring methods, and has the advantages of multiple functions and high efficiency.
(2) The measuring method of the invention needs few instruments and has the advantage of low cost.
(3) The measuring method of the invention has the advantages of simple operation, reliable measuring result and strong practicability.
Drawings
Fig. 1 is a plan view of the multifunctional measuring board of the present invention.
FIG. 2 is a schematic diagram of the method for measuring the fuel injection advance angle of the present invention.
FIG. 3 is a schematic diagram of a method of measuring the fuel injection duration angle of the present invention.
FIG. 4 is a schematic diagram of the injection penetration, wide-angle injection and injection quantity measuring method of the present invention.
FIG. 5 is a schematic of the injection rate measurement method of the present invention.
In the figure: 101-crankshaft mounting hole, 102-crankshaft angle dial, 103-dial pointer, 104-important scale, 105-oil injector mounting hole, 106-oil beam measuring scale mark, 201-position of dial pointer, 202-oil injector, 203-oil beam, 204-oil injection advance angle.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
In one aspect of the present invention, a multifunctional measuring board is provided, and the implementation manner is as follows:
as shown in fig. 1, the multifunctional measuring plate of the present invention includes five portions, namely, a crankshaft mounting hole 101, a crank angle dial 102, a dial pointer 103, an injector mounting hole 105, and an oil beam measuring scale 106. The crankshaft of the engine is arranged on the left side of the measuring plate, and the oil injector is arranged on the right side of the measuring plate.
Crankshaft mounting hole 101 and engine crankshaft between be clearance fit, can not cause mutual friction between the two, consequently the vibrations of engine crankshaft can not transmit for measuring the board, guaranteed measuring the stability of board.
The dial is arranged at a position concentric with the crankshaft, and 360 scales are provided in total by taking 1 degree as a unit, wherein important scales 104, such as the scale pointed by a dial pointer 103 when an engine piston reaches the top dead center, and the scales corresponding to the scales 9 degrees, 12 degrees and 15 degrees before the top dead center are drawn by red lines, so that the actual fuel injection advance angle and the theoretical fuel injection advance angle can be conveniently compared during measurement.
The dial indicator 103 is located in an installation hole in the surface of the crankshaft, the dial indicator and the installation hole are in interference fit, super glue is added into the installation hole during installation, the dial indicator 103 after installation is guaranteed not to be thrown out due to centrifugal force of high-speed rotation of the crankshaft, and the indicator can indicate the rotation angle of the crankshaft.
The surface of the measuring plate is subjected to frosting treatment, so that the lens cannot be reflected when the oil injection performance measurement shooting is carried out, and the performance measurement needs to be matched with a high-speed camera which can shoot 1000 frames in 1 second.
The oil sprayer mounting hole 105 is in small interference fit with the oil sprayer, the oil sprayer is tightly matched with the measuring plate after being mounted and is vertical to the measuring plate, relative motion is avoided, the position of the oil sprayer in the performance measuring process is ensured to be fixed, and the measuring reliability is improved; the distance measuring plate for the position of the oil spray hole of the oil sprayer after installation is 5 mm.
The oil beam measuring scale mark 106 is pasted on the measuring plate through a magic tape, so that the paste is firm and cannot be loosened in the measuring process; the number of the scale marks is determined according to the number of the oil injection holes of the oil injector, and is usually 4 or 5, and the scale marks are attached to positions, facing out, of each oil injection hole after the oil injector is mounted on the measuring plate, so that the accuracy of measuring related oil injection performance parameters is ensured; the scale mark is 300mm long, the minimum scale is 1mm, and the scale 0 is regarded as the position of the oil spray hole.
According to another aspect of the invention, a method for measuring an injection advance angle, an injection duration angle, an injection penetration, an injection wide angle, an injection quantity, an injection rate and analyzing a normal injection condition is provided, and the method comprises the following steps:
the method for measuring the oil injection advance angle is schematically shown in the attached figure 2. The measurement begins when the dynamometer is dragging the engine speed back to 600 rpm, and the high speed camera is used to record the entire process of fuel injection by the fuel injector 202. Observing the oil injection condition in professional image processing software, and when the oil beam 203 appears at the outlet of the oil injection hole of a certain frame for the first time, the included angle phi 204 between the position 201 of the dial indicator 103 and the top dead center position is the oil injection advance angle.
The measuring method of the oil injection continuous angle is shown in the figure 3, the measuring is started when the dynamometer reversely drags the engine speed to 600 revolutions per minute, the whole oil injection process of the oil injector is recorded by using a high-speed camera, the oil injection condition is observed in professional image processing software, and when a certain frame of oil beam 303 begins to leave the outlet of an oil injection hole, the included angle △ phi between the position 301 pointed by the dial indicator 103 and the oil injection advanced angle position is the oil injection continuous angle.
The schematic diagram of the measuring method of the injection penetration, the wide angle of the oil injection and the amount of the oil injection is shown in the attached figure 4.
And the measurement of the penetration degree of the oil injection starts when the dynamometer reversely drags the engine to rotate at 600 rpm, 1800 rpm and 2400 rpm, and the whole oil injection process of the oil injector is recorded by using a high-speed camera. The oil injection condition of the corresponding rotating speed is observed in professional image processing software, when a certain frame of oil beam 303 begins to leave the outlet of the oil injection hole, the position where the initial end of the oil beam reaches the oil beam measuring scale mark 106 and the position where the tail end of the oil beam is located are recorded, and the scale difference L401 between the two positions can represent the oil injection penetration.
The oil injection wide-angle measurement is started when the dynamometer reversely drags the engine to rotate at 600 rpm, 1800 rpm and 2400 rpm, the whole oil injection process of the oil injector is recorded by using a high-speed camera, the shape of an oil bundle with the corresponding rotating speed is observed in professional image processing software, and the included angle α 402 between the upper boundary and the lower boundary of the oil bundle is the oil injection wide-angle.
And the fuel injection quantity measurement is started when the dynamometer reversely drags the engine to rotate at 600, 1800 and 2400 revolutions per minute, and the whole fuel injection process of the fuel injector is recorded by using the high-speed camera. Calculating the pixel area of the picture occupied by the oil beam 403 when the oil beam leaves the oil injector at the corresponding rotating speed in professional image processing software, and determining the oil injection quantity according to the relation between the calibrated pixel area and the oil quantity.
A schematic of the injection rate measurement method of the present invention is shown in FIG. 5. And starting measurement when the rotating speed of the dynamometer back-dragging engine reaches 600, 1800 and 2400 revolutions per minute, and recording the whole fuel injection process of the fuel injector by using a high-speed camera. Recording the corresponding speed of rotation T in the professional image processing software1Scale value L of the beginning end of the oil beam 502 on the scale mark at the moment1And the next frame T2Scale value L of the beginning end of the oil beam 501 on the scale mark at the moment2The difference △ L503 between the two scales and the time interval △ T are used to calculate the injection rate at that moment.
The normal injection condition analysis is started when the dynamometer reversely drags the engine to rotate at 600, 1800 and 2400 revolutions per minute, the plunger rotation angle is adjusted to the single-cylinder circulating oil quantity at the positions of 3mg and 12mg, the whole oil injection process of the oil injector in 10 cycles of the engine is recorded by a high-speed camera, 6 groups are measured in total, whether abnormal injection conditions such as alternate injection, secondary injection and the like occur or not is observed in professional image processing software, whether the difference of the oil injection quantity of adjacent cycles meets the requirement or not can be measured when the alternate injection occurs, and whether the oil injection continuation angle and the oil injection penetration meet the requirement or not can be measured when the secondary injection occurs.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (8)
1. The engine oil injection performance multi-parameter measuring device is characterized by comprising a measuring plate, a crankshaft mounting hole, a crankshaft corner dial, a dial indicator, an oil injector mounting hole, an oil beam measuring scale mark and a camera device,
the measuring plate is provided with a crankshaft angle dial, a crankshaft mounting hole and an oil injector mounting hole, and the crankshaft mounting hole is positioned in the center of the crankshaft angle dial and is in clearance fit with the crankshaft of the engine; the crankshaft corner dial is concentric with the crankshaft, the crankshaft mounting hole is in clearance fit with the crankshaft of the engine, the crankshaft corner dial is provided with angle scales, the dial pointer is positioned in the mounting hole on the surface of the crankshaft and can rotate along with the crankshaft, and the crank corner can be indicated by the dial pointer at once; the oil sprayer mounting holes are arranged on the oil sprayer, the oil beam measuring scale marks are arranged on the measuring plate and are positioned at the positions where each oil spraying hole is opposite to each other,
the scales on the crank angle dial are 360 scales with 1 degree as a unit,
the dial indicator and the surface mounting hole of the crankshaft are in interference fit,
the crankshaft of the engine is arranged on the left side of the measuring plate, the fuel injector is arranged on the right side of the measuring plate,
the important scales on the crank angle dial are represented in red, and refer to the scales pointed by the dial pointer when the piston of the engine reaches the top dead center and the corresponding scales at 9 degrees, 12 degrees and 15 degrees before the top dead center;
the oil injector is tightly matched with the measuring plate and is vertical to the measuring plate, and no relative motion exists;
the distance measuring plate of the position of the oil spray hole of the oil sprayer after installation is 5mm,
the number of the oil beam measuring scale marks is determined according to the number of the oil injection holes of the oil injector, and is 4 or 5,
the scale length of the oil beam measuring scale mark is 300mm, the minimum scale is 1mm, the 0 scale is the position of the oil spray hole,
the surface of the measuring plate is subjected to sanding treatment,
the camera device is a high-speed camera, and the high-speed camera can shoot 1000 frames in 1 second.
2. The method for measuring the oil injection performance parameters by using the multi-parameter measuring device for the oil injection performance of the engine as claimed in claim 1, wherein the measuring method of the oil injection advance angle comprises the following steps: when the dynamometer reversely drags the engine to a certain rotation speed, the whole fuel injection process of the fuel injector is recorded by the camera device, the fuel injection condition is observed in image processing software, when the fuel beam appears at the outlet of a fuel injection hole of a certain frame for the first time, the included angle phi between the position of a dial indicator and the position of the top dead center is the fuel injection advance angle, and the certain rotation speed is 600 revolutions per minute.
3. The method for measuring the fuel injection performance parameters by using the multi-parameter measuring device for the fuel injection performance of the engine of claim 1 is characterized in that the measuring method for the fuel injection continuous angle is that when a dynamometer reversely drags the engine speed to a certain speed, the whole fuel injection process of a fuel injector is recorded by a camera device, the condition of fuel injection is observed in image processing software, when a certain frame of fuel beam starts to leave an outlet of a fuel injection hole, an included angle △ phi between the position pointed by a dial indicator and a fuel injection advanced angle position is an oil injection continuous angle,
the certain rotating speed is 600 revolutions per minute.
4. The method for measuring the fuel injection performance parameters by using the multi-parameter measuring device for the fuel injection performance of the engine as claimed in claim 1, wherein the fuel injection penetration measuring method comprises the following steps: when the dynamometer reversely drags the engine to a first rotating speed, a second rotating speed and a third rotating speed, the whole fuel injection process of the fuel injector is recorded by the camera device respectively, the fuel injection condition of the corresponding rotating speed is observed in the image processing software, when a certain frame of fuel beam starts to leave the outlet of the fuel injection hole, the position where the initial end of the fuel beam reaches the measurement scale mark of the fuel beam and the position where the tail end of the fuel beam are located are recorded, and the scale difference L of the two positions represents the size of the penetration degree of the fuel injection,
the first rotating speed is 600 revolutions per minute, the second rotating speed is 1800 revolutions per minute, and the third rotating speed is 2400 revolutions per minute.
5. The method for measuring the oil injection performance parameters by using the multi-parameter measuring device for the oil injection performance of the engine as claimed in claim 1, wherein the measuring method of the oil injection quantity is as follows: when the dynamometer reversely drags the engine to a first rotating speed, a second rotating speed and a third rotating speed, the whole fuel injection process of the fuel injector is recorded by the camera device respectively, the pixel area of the picture occupied by the fuel beam when the fuel beam leaves the fuel injector at the corresponding rotating speed is calculated in the image processing software, the fuel injection quantity is determined according to the relation between the calibrated pixel area and the fuel quantity,
the first rotating speed is 600 revolutions per minute, the second rotating speed is 1800 revolutions per minute, and the third rotating speed is 2400 revolutions per minute.
6. The method for measuring the oil injection performance parameters by using the multi-parameter measuring device for the oil injection performance of the engine as claimed in claim 1 is characterized in that the wide-angle measuring method for the oil injection is that when a dynamometer reversely drags the rotating speed of the engine to a first rotating speed, a second rotating speed and a third rotating speed, the whole oil injection process of an oil injector is recorded by using a camera respectively, the shape of an oil bundle of the corresponding rotating speed is observed in image processing software, the included angle α between the upper boundary and the lower boundary of the oil bundle is the wide-angle of oil injection,
the first rotating speed is 600 revolutions per minute, the second rotating speed is 1800 revolutions per minute, and the third rotating speed is 2400 revolutions per minute.
7. The method for measuring the fuel injection performance parameters by using the multi-parameter measuring device for the fuel injection performance of the engine as claimed in claim 1, wherein the injection rate measuring method comprises the following steps: when the dynamometer reversely drags the engine to the first rotating speed, the second rotating speed and the third rotating speed, the shooting device is respectively used for recording the sprayingThe oil sprayer sprays oil in the whole process, and corresponding rotation speed T is recorded in image processing software1Scale value L of starting end of oil beam on scale mark at moment1And the next frame T2Scale value L of starting end of oil beam on scale mark at moment2The difference △ L between the two scales and the time interval △ T are used for calculating the oil injection rate at the moment,
the first rotating speed is 600 revolutions per minute, the second rotating speed is 1800 revolutions per minute, and the third rotating speed is 2400 revolutions per minute.
8. The method for measuring the fuel injection performance parameters by using the multi-parameter measuring device for the fuel injection performance of the engine as claimed in claim 1, wherein the injection condition analysis method comprises the following steps: when the dynamometer reversely drags the engine to a first rotating speed, a second rotating speed and a third rotating speed, and the rotating angle of the plunger is respectively adjusted to the positions of single-cylinder circulating oil quantity at the first oil quantity and the second oil quantity, the whole oil injection process of the oil injector in a plurality of cycles of the engine is recorded by the camera device, whether abnormal injection occurs or not is observed in image processing software, whether the difference of the oil injection quantity of adjacent cycles meets the requirement or not can be measured when every other injection occurs, whether the oil injection continuous angle and the oil injection penetration degree meet the requirement or not can be measured when the secondary injection occurs,
the first rotating speed is 600 revolutions per minute, the second rotating speed is 1800 revolutions per minute, the third rotating speed is 2400 revolutions per minute,
the first oil amount is 3mg, the second oil amount is 12mg,
the plurality of cycles is 10 cycles.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329200A (en) * | 2014-08-21 | 2015-02-04 | 陈锦华 | Diesel engine oil sprayer oil spraying condition observing device |
| CN104763488A (en) * | 2015-01-30 | 2015-07-08 | 奇瑞汽车股份有限公司 | Optical engine timing mechanism, optical engine timing method and optical engine |
| CN105275700A (en) * | 2015-11-13 | 2016-01-27 | 广西玉柴机器股份有限公司 | Detecting device for electronic control oil injector |
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| KR100786033B1 (en) * | 2006-07-03 | 2007-12-17 | 지.티.에스 (주) | A Test device spray form and spray angle for upper block and lower block |
| DE102011100523A1 (en) * | 2011-05-05 | 2012-11-08 | Volkswagen Aktiengesellschaft | Injector nozzle i.e. multi-hole injector nozzle, for use in diesel engine, has nozzle body whose wall is penetrated by four spraying holes, which alternatively include flattened angle and steep spraying hole angle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329200A (en) * | 2014-08-21 | 2015-02-04 | 陈锦华 | Diesel engine oil sprayer oil spraying condition observing device |
| CN104763488A (en) * | 2015-01-30 | 2015-07-08 | 奇瑞汽车股份有限公司 | Optical engine timing mechanism, optical engine timing method and optical engine |
| CN105275700A (en) * | 2015-11-13 | 2016-01-27 | 广西玉柴机器股份有限公司 | Detecting device for electronic control oil injector |
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