Graphing spikes

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grapeman
Posts: 1
Joined: 11 Apr 2015, 00:27

Graphing spikes

Post by grapeman » 11 Apr 2015, 00:35

Hi all,

I was using the engine RPM and desired RPM parameters as inputs yesterday to capture this graph:

https://www.dropbox.com/s/wx20wazhk6hzbqv/rpm.jpg?dl=0

I was trying to see if my crank sensor was on the way out looking for spikes in the engine RPM - which we can see. However the desired RPM is also spiking which is surprising. I would have thought the desired value is calculated in the ecu so wouldn't be susceptible to this behavior. Is this a bug in MES? A problem with the sampling rate or lag in the plotting?

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