Hi to everyone on here
I am a student using a Pico Scope as part of a final year project based on a FORD TDCI engine that is fixed to an engine dyno. I have very little understanding of automotive electronics at this stage and I plan to use this forum to help me improve my understanding of the signals that I get from the engine.
So far, my project supervisor has shown me how set up the scope in order to record the signals of the crankshaft position sensor and a few other sensors.
During the testing we recorded the motor signal which controls the variable vanes on the turbo, the signal we were expecting was a Pulse width modulation signal. However we recorded a signal which appears to be an on/off positive and negative pulse. The signal appears to be at a frequency of 50 Hz, we are slightly concerned that this could be due to some interference from the mains.
Has anyone recorded a variable vane motor signal with similar results?
If anyone is able to shed any light on this It would really help move my project forward to the next stage.