injus query for dcb
 

Still working at calibrating the mpguino on the HDi diesel - I have a question about the "injus" variable.

Is it simply the microseconds that the injector signal is "open"?

I have had to add some signal conditioning including a variable resistor to get a believable reading as I think it was just capturing the pre-injection and not the main injection.

Still on your v0.75 code I'm afraid, in case that makes a difference to the answer!

thanks

I don't know of a variable named specifically injus", there are these below:
for instant trip, injHiSec never gets incremented (the trip gets reset every half second) and injHius is the number of microseconds that the injector was open during the last 1/2 second.

.75 is the latest version, just added some instant speed fixes in .74 and .75 was basically documentation only.

sorry, I meant injHius.

I find that injHius returns a sensible number most of the time (about 10,000 at idle in my case) but then returns a number about 80% of that expected, say every fifth update. I guess this is when the injector open time crosses two half-second measurement periods?

Oh and another typo- I'm on v0.70 not v0.75!

That sounds about right. That is why there is all the timing of individual pulses and stuff just for instant consumption and speed, otherwise it bounces around on the display.