Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Squeezing extra MPG out of P&G (EOC WHILE KEEPING THE CAR ON??)

bestclimb · 04-02-2014, 06:58 PM

14.36v flow off
13.50v higher fuel flow
14.25 low fuel flow

My assumption is that the injectors are supplied with ~14.4 or system voltage (could confirm by checking and comparing voltage at injector to battery voltage with engine running (so charged by alternator) and off)

You are seeing an average voltage (PWM injector signal)
so calling for lots of fuel injector is open (therefore drawing more current) so voltage drops.

calling no fuel injectors off so you see supply voltage.

So... from 13.5 to 14.35 then 14.25 you are seeing call for lots of fuel, then no fuel then a little fuel.

At least that's how I read it.

04-02-2014, 06:58 PM	#39 (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	14.36v flow off 13.50v higher fuel flow 14.25 low fuel flow My assumption is that the injectors are supplied with ~14.4 or system voltage (could confirm by checking and comparing voltage at injector to battery voltage with engine running (so charged by alternator) and off) You are seeing an average voltage (PWM injector signal) so calling for lots of fuel injector is open (therefore drawing more current) so voltage drops. calling no fuel injectors off so you see supply voltage. So... from 13.5 to 14.35 then 14.25 you are seeing call for lots of fuel, then no fuel then a little fuel. At least that's how I read it. __________________ 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.