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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 20:07, 9 June 2020
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==Engine Configuration== | ==Engine Configuration== | ||
One of the objectives of the EngineDiag module is to integrate in NVGate the physical data related to the engine under test in order to have all this information during the analysis. | One of the objectives of the EngineDiag module is to integrate, in NVGate, the physical data related to the engine under test in order to have all this information during the analysis. | ||
The design and the kinematic information can be described by clicking on the button Engine. | The design and the kinematic information can be described by clicking on the button Engine. | ||
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By clicking on "new", a default engine model is loaded and the "settings" panel is automatically displayed. | By clicking on "new", a default engine model is loaded and the "settings" panel is automatically displayed. | ||
Here, some modifications can be done. | |||
* Load: Load an existing engine model | * Load: Load an existing engine model | ||
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===Settings=== | ===Settings=== | ||
The settings panel allows to describe the engine characteristics. | The settings panel allows you to describe the engine characteristics. | ||
[[Image:EngineDiag_23.png|framed|none]] | [[Image:EngineDiag_23.png|framed|none]] | ||
The 3 fields: Nominal power, rated speed and cylinder bank angle are here for information. The results are not influenced by these values. | The 3 fields: Nominal power, rated speed and cylinder bank angle are here for more information. The results are not influenced by these values. | ||
The | The other settings will influence the results. | ||
* Cylinder configuration: Vee or In Line | * Cylinder configuration: Vee or In Line | ||
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* Cylinders number: indicate the 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 automatically drawn. The | With this information, a schematic picture is automatically drawn. The cylinder's names can be modified by clicking directly on them. | ||
On this picture, the small numbers in red represent the firing order. This order can be modified panel below the picture. | 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=== | ||
The timing information corresponds to the machine kinematics. The cycle of each reciprocating machine is divided in to several phases. These phases are separated by kinematic events. The figure below shows the typical cycle of a 4-stroke diesel engine with the different phases: | The timing information corresponds to the machine kinematics. The cycle of each reciprocating machine is divided in to several phases. These phases are separated by kinematic events. The figure below shows the typical cycle of a 4-stroke diesel engine with the different phases: | ||
[[File:Engine_diag3.png|framed|none]] | [[File:Engine_diag3.png|framed|none]] | ||
The duration of each phase is defined by the valves opening and closing. The position of these events is given in angle | The duration of each phase is defined by the valves opening and closing. The position of these events is given in angle relative to the Top Dead Center (TDC) where the piston is at top of the cylinder or Bottom Dead Center (BDC) where the piston is at the bottom of the cylinder. | ||
This information is generally contained in the timing diagram provided by the engine manufacturer. | This information is generally contained in the timing diagram provided by the engine manufacturer. | ||
EngineDiag supports the ability to enter the timing diagram information to be used in the analysis. <br> | EngineDiag supports the ability to enter the timing diagram information to be used in the analysis. <br> | ||
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The timing panel allows to describe the timing information generally provided by the engine manufacturer. | The timing panel allows you to describe the timing information generally provided by the engine manufacturer. | ||
[[Image:EngineDiag_24.png|framed|none]] | [[Image:EngineDiag_24.png|framed|none]] | ||
* The events table | * The events table | ||
The events table allows define the kinematic events (Intake opening, exhaust opening,…) and position them in relation to the events Top Dead Center (TDC) and Bottom Dead Center (BDC). | The events table allows you to define the kinematic events (Intake opening, exhaust opening,…) and position them in relation to the events Top Dead Center (TDC) and Bottom Dead Center (BDC). | ||
An event is defined by: | An event is defined by two things: | ||
* an angle from the TDC or BDC, | * 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. | * its position in the engine cycle. | ||
Every | 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. | |||
A new event can be added by clicking on | A new event can be added by clicking on the | ||
[[Image:EngineDiag_25.png]] | [[Image:EngineDiag_25.png]] | ||
below the events table. | below the events table. | ||
. | . | ||
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From the events described in the events table, the different phases of the engine cycle can be defined. Each phase is defined by its start and stop event as well as a color. The settings can be modified by double clicking on the concerned setting. | From the events described in the events table, the different phases of the engine cycle can be defined. Each phase is defined by its start and stop event as well as a color. The settings can be modified by double clicking on the concerned setting. | ||
A new phase can be added by clicking on | A new phase can be added by clicking on the | ||
[[Image:EngineDiag_27.png]] | [[Image:EngineDiag_27.png]] | ||
below the phases table. The selected phase can be removed by clicking on | below the phases table. The selected phase can be removed by clicking on the | ||
[[Image:EngineDiag_28.png]] | [[Image:EngineDiag_28.png]] | ||
. | . | ||
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* Analyzer input, | * Analyzer input, | ||
* Label, | * Label, | ||
* Type of transducer by using the transducer database. The sensitivity of the selected transducer is automatically displayed. | * Type of transducer by using the transducer database. | ||
The sensitivity of the selected transducer is automatically displayed. | |||
[[Image:EngineDiag_30.png|framed|none]] | [[Image:EngineDiag_30.png|framed|none]] | ||
Several transducers can be installed on the same cylinder. | Several transducers can be installed on the same cylinder. You can define the maximum number of inputs per cylinder. See the example below with 3 inputs: | ||
[[Image:EngineDiag_31.png|framed|none]] | [[Image:EngineDiag_31.png|framed|none]] | ||
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[[Image:EngineDiag_32.png|framed|none]] | [[Image:EngineDiag_32.png|framed|none]] | ||
Several groups of transducers can be defined often associated to a machine part: bearing, absorber... | Several groups of transducers can be defined, which are often associated to a machine part: bearing, absorber... | ||
Double click on "New part" to define the part name and click on | Double click on "New part" to define the part name and click on the | ||
[[Image:EngineDiag_33.png]] | [[Image:EngineDiag_33.png]] | ||
to add a new part. | to add a new part. | ||
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====Analysis==== | ====Analysis==== | ||
The Analysis panel allows to select the type of analysis that will be done. This information will be used to help the user to configure NVGate. | The Analysis panel allows you to select the type of analysis that will be done. This information will be used to help the user to configure NVGate. | ||
[[Image:EngineDiag_36.png|framed|none]] | [[Image:EngineDiag_36.png|framed|none]] | ||
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* The asynchronous analysis uses the FFT plug-in | * The asynchronous analysis uses the FFT plug-in | ||
When the engine model is defined do not forget to save it in the Engine panel with the Save as button. | When the engine model is defined, do not forget to save it in the Engine panel with the "Save as" button. | ||
==NVGate configuration== | ==NVGate configuration== | ||