Motorvate DIY Video: How Drive by Wire Works

SouthArk370Z

Nice job.

What causes the negative spike at the end of each pulse? Motor inductance?


Edit: Watched a few more of your vids and was impressed.

For the K&N vs OEM air filter test, I would like to have seen another run with the OEM filter - this would show if engine internals (and other parts in the engine bay) warming had any effect. Going by fuel/oil/water temp data, the effect should be minimal but a third run with the OEM filter would "prove" it.

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MotorvateDIY

Correct!
When the MOSFET is turned off, the magnetic field in the DC motor collapses and induces a reverse current. This is also known as "Back EMF"

MotorvateDIY

Thanks for the kind words about my videos.

I am planning to go back to a different dyno and re-test. This time with a new Infiniti filter, used K&N, freshly cleaned K&N and NO air filter.

Plus I will be data logging the air pressure just after the filter with an Arduino Uno clone and differential +/- 10KPa Honeywell pressure sensor, writing to a SD card.

AND using an other Arduino, data log the differential oil temps and trans oil temps on the 6 speed manual.

As you may of guessed, I do like my data