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Difference between revisions of "NVGate Diesel Engine Vibration Solution: EngineDiag"
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NVGate Diesel Engine Vibration Solution: EngineDiag (view source)
Revision as of 20:30, 24 June 2020
, 20:30, 24 June 2020English edits
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By clicking on "Load", an existing engine model can be loaded by selecting a file .engine. | By clicking on "Load", an existing engine model can be loaded by selecting a file .engine. | ||
* Remove: Remove the current engine model | * Remove: Remove the current engine model. | ||
* Save as: Save the current engine model to a file | * Save as: Save the current engine model to a file. | ||
This panel gives also the model name defined in the settings panel and all the comments written by the user. The field "comments" is saved in the engine model. | This panel gives also the model name defined in the settings panel and all the comments written by the user. The field "comments" is saved in the engine model. | ||
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The other settings will influence the results. | The other settings will influence the results. | ||
* Cylinder configuration: | * Cylinder configuration: Free or In Line. | ||
* Engine cycle: 2 strokes or 4 strokes | * Engine cycle: 2 strokes or 4 strokes. | ||
* Cylinders number: | * Cylinders number: Indicate the cylinders number. | ||
* Rotating Direction: Clockwise or counterclockwise | * Rotating Direction: Clockwise or counterclockwise | ||
With this information, a schematic picture is | With this information, a schematic picture is automatic.ally drawn. The cylinder's names can be modified by clicking directly on them. | ||
On this picture, the small numbers in red represent | On this picture, the small numbers in red represent the firing order. This order can be modified in the panel below the picture. | ||
===Timing=== | ===Timing=== | ||
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An event is defined by two things: | An event is defined by two things: | ||
* | * An angle from the TDC or BDC. | ||
* | * Its position in the engine cycle. | ||
This information is important for four-stroke engines. It<nowiki>'</nowiki>s necessary to know if the event appears in the first or in the second crankshaft revolution. | This information is important for four-stroke engines. It<nowiki>'</nowiki>s necessary to know if the event appears in the first or in the second crankshaft revolution. | ||
Every modification done in the events table is automatically reported on the two graphs displayed here. At the top, a typical timing diagram and at the bottom the linear engine cycle representation. | Every modification done in the events table is automatically reported on the two graphs displayed here. At the top, a typical timing diagram and at the bottom the linear engine cycle representation. | ||
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For each cylinder, one can define: | For each cylinder, one can define: | ||
* Analyzer input | * Analyzer input. | ||
* Label | * Label. | ||
* Type of transducer by using the transducer database. | * Type of transducer by using the transducer database. | ||
The sensitivity of the selected transducer is automatically displayed. | The sensitivity of the selected transducer is automatically displayed. | ||
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, solves the selected errors in the list. | , solves the selected errors in the list. | ||
The advisor gives only | The advisor gives only advice. The user can read the information and decide to ignore some of the errors. Each error can be hidden by clicking on the button shown below. | ||
[[Image:EngineDiag_49.png|framed|none]] | [[Image:EngineDiag_49.png|framed|none]] | ||
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The cycle overview (defined in Engine/Timing) of each displayed cylinders are shown at the bottom of the window. The cycle overview of each cylinders is determined by: | The cycle overview (defined in Engine/Timing) of each displayed cylinders are shown at the bottom of the window. The cycle overview of each cylinders is determined by: | ||
* The tachometer reference | * The tachometer reference. | ||
* The firing order | * The firing order. | ||
* The timing diagram | * The timing diagram. | ||
2 cursors displayed on the signals and the cycle overview allow you to identify the kinematic events on the signals. | 2 cursors displayed on the signals and the cycle overview allow you to identify the kinematic events on the signals. | ||
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On the example above the cursors are positioned at the beginning of the 2 main events of the signal. Looking at the cycle overview, one can note that: | On the example above the cursors are positioned at the beginning of the 2 main events of the signal. Looking at the cycle overview, one can note that: | ||
* The first cursor corresponds to the end of the exhaust phase, i.e. the exhaust valve closing | * The first cursor corresponds to the end of the exhaust phase, i.e. the exhaust valve closing. | ||
* The second cursor corresponds to the end of the intake phase, i.e. the intake valve closing. | * The second cursor corresponds to the end of the intake phase, i.e. the intake valve closing. | ||
* By default, only one cycle is displayed in this window, 360° (crankshaft angle) for a 2-strokes engine or 720 ° (crankshaft angle) for a 4-strokes engine. More cycles can be displayed. The number can be defined in the Engine Ribbon. | * By default, only one cycle is displayed in this window, 360° (crankshaft angle) for a 2-strokes engine or 720 ° (crankshaft angle) for a 4-strokes engine. More cycles can be displayed. The number can be defined in the Engine Ribbon. | ||
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[[Image:EngineDiag_60.png|framed|none]] | [[Image:EngineDiag_60.png|framed|none]] | ||
Otherwise right click in the window and click on "Add to result selection", like below. | Otherwise, right click in the window and click on "Add to result selection", like below. | ||
[[Image:EngineDiag_61.gif|framed|none]] | [[Image:EngineDiag_61.gif|framed|none]] | ||
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===Comparison=== | ===Comparison=== | ||
This Avg. RMS Engine result can be saved like the other NVGate results. Add the results in the "Save Selection" tab available in the "Save setup" window, | This Avg. RMS Engine result can be saved like the other NVGate results. Add the results in the "Save Selection" tab available in the "Save setup" window, which is accessible in the Measurement Ribbon. | ||
[[Image:EngineDiag_68.png|framed|none]] | [[Image:EngineDiag_68.png|framed|none]] | ||
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The History mode shows the values with the standard deviation in absolute time. It allows you to follow the parameters during a long period. | The History mode shows the values with the standard deviation in absolute time. It allows you to follow the parameters during a long period. | ||
In this representation, a color is associated to each cylinder. | In this representation, a color is associated to each cylinder. The same color is used on the graph and in the results table in the infotrace. | ||
==Angle-Frequency Analysis and Display== | ==Angle-Frequency Analysis and Display== | ||
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The second step is to define the tachometers that will be used for the analysis: | The second step is to define the tachometers that will be used for the analysis: | ||
* Assoc. Tach: | * Assoc. Tach: Here you can define the tachometer that will be used for the synchronous analysis. | ||
* Samp. Pulse: | * Samp. Pulse: Indicate the tachometer that will be used for the angular sampling. This signal must contain several pulses per revolution and will lead to a better accuracy in angle. Nevertheless, it<nowiki>'</nowiki>s not necessary to define a sampling pulse. The angular sampling can be done with the Assoc. Tach. In this case, set this parameter to none. | ||
'''Tracks''' | '''Tracks''' | ||