Ignition Cylinder Information: Difference between revisions

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=== Main Cylinder Information Screened ===
=== Main Cylinder Information Screen ===
Note: This screen was superseded in EIM version 2.00. See the page "New Ignition Cylinder Information" for the page(s) on 2.00 and newer.


The Cylinder Information screen (Pg. 440) presents ignition information in bar graph form and provides access to additional individual cylinder information. It is accessed by selecting the spark bar graphs on the Ignition Home Screen.
The spark information screen is reached by selecting the spark duration bar graphs on the ICM home page. This page is shown below. If using more than 8 cylinders, a button will be shown that switches between the upper and lower half of cylinders, since the page will only show up to 8 cylinders at once.


[[File:Ignition Cylinder Info.jpg]]
[[File:Icm-spark-info.PNG]]


''Ignition Cylinder Information Screen''
On the left side of the screen is the spark durations. In general, the spark durations should be relatively steady and similar between cylinders. If one cylinder is much longer or shorter, it may have issues with the plug, coil, wiring, or cylinder compression. The preferred duration zone is shown. If too short, the combustion may be weak and incomplete. If too long, plug life will be shorter and there could be detonation issues if the plugs heat up too much.


The following information can be visually compared through the bar graphs, and can be changed by clicking on the data item above the bar graph and selecting a different data item. The current average is highlighted and an average bar is shown for that data value.
On the right side of the screen the misfire count for each cylinder is shown. These will accumulate indefinitely from power up. Sometimes a few misfires will be registered over time without being an issue. If one (or multiple) cylinders have many misfires in the past, the plugs and wiring should be checked. Selecting the 'Reset' box will clear the counts to zero.


* “Spark Duration” – Spark time for each cylinder
''Long term spark trend''
* “Cyc-to-Cyc Variation” – Changes in spark duration from cycle to cycle for each cylinder
* “Dwell Time” – Amount of time the ignition coil is being charged in ms
* “Total Timing” – Displays timing for each cylinder
* “Misfires” – Displays accumulated misfires for each cylinder. If in Engineering access mode, this value can be cleared.


If a bar graph background flashes yellow, then a misfire occurred on that cylinder. If this happens frequently on a given cylinder, the spark plug and coil should be checked.
Selecting the 'Spark Durations' box will bring up the spark trend page that shows the spark duration trend over the last month.


=== SPARK GRAPHING ===
The spark trend page shows up to 8 cylinders at once for the last one month. This page can be used to see if there is a trend in spark durations. If the sparks have been trending downward a fair amount, the plugs may be reaching time to be changed. This is the same information that is contained in the normal one-month ICM data log, but graphed out at once. The graph can be selected to cycle between graphing one month and one day of data.
The Spark Graph screen (Pg. 448) is accessed by selecting the “Spark Graphing” button from the Cylinder Information screen (Pg. 440).


To graph a spark waveform, select the cylinder to capture and press the “Capture Spark” button. A healthy spark should be drawn as shown below. Unhealthy sparks will be abnormally short/long or have intermittent jogs within the low duration of the spark.
Selecting one of the cylinder boxes on the left will highlight one cylinder's trend line to more easily compare it to the others.
 
[[File:Ignition Spark Display.jpg]]
 
''Spark Graph Screen''
 
=== INDIVIDUAL CYLINDER INFORMATION ===
The Individual Cylinder Information screen (Pg. 442) presents comparison data for the particular cylinder selected from the Cylinder Information screen (Pg. 440). The data displayed compares various information from the cylinder to the engine average. Data is displayed in table form as well as graphically through bar graphs.
 
Individual cylinder timing is adjustable from this screen. Selecting the “Advance Cylinder Timing” and “Retard Cylinder Timing” buttons adjusts the offset from the Total Timing of the system. Timing offsets are in increments of 0.25°. Security access of Setup or Engineering is required to adjust the timing.
 
[[File:Ignition Individual Cylinder.jpg]]
 
''Ignition Individual Cylinder Information Screen''

Latest revision as of 15:47, 4 August 2022

Main Cylinder Information Screen

The spark information screen is reached by selecting the spark duration bar graphs on the ICM home page. This page is shown below. If using more than 8 cylinders, a button will be shown that switches between the upper and lower half of cylinders, since the page will only show up to 8 cylinders at once.

Icm-spark-info.PNG

On the left side of the screen is the spark durations. In general, the spark durations should be relatively steady and similar between cylinders. If one cylinder is much longer or shorter, it may have issues with the plug, coil, wiring, or cylinder compression. The preferred duration zone is shown. If too short, the combustion may be weak and incomplete. If too long, plug life will be shorter and there could be detonation issues if the plugs heat up too much.

On the right side of the screen the misfire count for each cylinder is shown. These will accumulate indefinitely from power up. Sometimes a few misfires will be registered over time without being an issue. If one (or multiple) cylinders have many misfires in the past, the plugs and wiring should be checked. Selecting the 'Reset' box will clear the counts to zero.

Long term spark trend

Selecting the 'Spark Durations' box will bring up the spark trend page that shows the spark duration trend over the last month.

The spark trend page shows up to 8 cylinders at once for the last one month. This page can be used to see if there is a trend in spark durations. If the sparks have been trending downward a fair amount, the plugs may be reaching time to be changed. This is the same information that is contained in the normal one-month ICM data log, but graphed out at once. The graph can be selected to cycle between graphing one month and one day of data.

Selecting one of the cylinder boxes on the left will highlight one cylinder's trend line to more easily compare it to the others.

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