Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - What kind of FE instrumentation for Pre-OBD2 Diesel

bestclimb · 03-05-2012, 01:29 PM

vern if you are pulling the lever out for and it is making a mileage difference you may think about adjusting the injector timing.

my understanding of the VW injection system is that while pressure to the injector is over x value a spring allows the injector to open.

in the pump if a pressure measuring device "knew" when the injector was opening and closing by sensing the pressure in the line (vw uses a variable stroke injector pump) longer stroke means higher flow rate and longer duration with the injector open. that information could be fed to an MPguino.

What we would have then is frequency and duration which is handled well by MPGuino, unfortunately duration and volume of fuel is probably not linear, but that could likely be solved with software.

03-05-2012, 01:29 PM	#8 (permalink)
bestclimb Smeghead Join Date: Oct 2009 Location: South Central AK Posts: 933 escort - '99 ford escort sport 90 day: 42.38 mpg (US) scoobaru - '02 Subaru Forester s 90 day: 28.65 mpg (US) Thanks: 32 Thanked 146 Times in 97 Posts	vern if you are pulling the lever out for and it is making a mileage difference you may think about adjusting the injector timing. my understanding of the VW injection system is that while pressure to the injector is over x value a spring allows the injector to open. in the pump if a pressure measuring device "knew" when the injector was opening and closing by sensing the pressure in the line (vw uses a variable stroke injector pump) longer stroke means higher flow rate and longer duration with the injector open. that information could be fed to an MPguino. What we would have then is frequency and duration which is handled well by MPGuino, unfortunately duration and volume of fuel is probably not linear, but that could likely be solved with software. __________________ Learn from the mistakes of others, that way when you mess up you can do so in new and interesting ways. One mile of road will take you one mile, one mile of runway can take you around the world.