Go Back   EcoModder Forum > EcoModding > Instrumentation > OpenGauge / MPGuino FE computer
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 04-02-2009, 08:51 AM   #1 (permalink)
EcoModding Apprentice
 
Join Date: Aug 2008
Location: UK
Posts: 104

Fizz - '06 Skoda Fabia Combi
TEAM VW AUDI Group
90 day: 56.62 mpg (US)
Thanks: 3
Thanked 9 Times in 7 Posts
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

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 04-02-2009, 09:06 AM   #2 (permalink)
dcb
needs more cowbell
 
dcb's Avatar
 
Join Date: Feb 2008
Location:
Posts: 5,038

pimp mobile - '81 suzuki gs 250 t
90 day: 96.29 mpg (US)

schnitzel - '01 Volkswagen Golf TDI
90 day: 53.56 mpg (US)
Thanks: 158
Thanked 267 Times in 210 Posts
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.

PHP Code:
  unsigned long injHiSec;// seconds the injector has been open      
  
unsigned long injHius;// microseconds, fractional part of the injectors open 
.75 is the latest version, just added some instant speed fixes in .74 and .75 was basically documentation only.
__________________
WINDMILLS DO NOT WORK THAT WAY!!!
  Reply With Quote
Old 04-02-2009, 10:22 AM   #3 (permalink)
EcoModding Apprentice
 
Join Date: Aug 2008
Location: UK
Posts: 104

Fizz - '06 Skoda Fabia Combi
TEAM VW AUDI Group
90 day: 56.62 mpg (US)
Thanks: 3
Thanked 9 Times in 7 Posts
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!
  Reply With Quote
Old 04-02-2009, 01:53 PM   #4 (permalink)
dcb
needs more cowbell
 
dcb's Avatar
 
Join Date: Feb 2008
Location:
Posts: 5,038

pimp mobile - '81 suzuki gs 250 t
90 day: 96.29 mpg (US)

schnitzel - '01 Volkswagen Golf TDI
90 day: 53.56 mpg (US)
Thanks: 158
Thanked 267 Times in 210 Posts
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.

__________________
WINDMILLS DO NOT WORK THAT WAY!!!
  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com