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I'm working on a fuel consumption meter and trip meter. I propose to display lph, distance to empty, fuel used since refill, fuel used since trip reset etc etc
Here is a picture of the prototype. The numbers on the diplay are 3223 & 5015. The 3223 is 32.23 km and the 5015 is the ml of fuel used for the trip. The number 15 is the l/100 km which is well rounded off.
What I am seeking is the injector cc/min and injector opening times.
I have assumed a 400cc/min injector with a 1ms opening time. The fuel calcs appear to be about low by about 15%, so my best guess is the injector is about 450cc/min. Hopefully someone could confirm?
This would make my numbers line up. I generally get around 18l/100km.
for the interested techo, I am sniffing the VSS from the CAN bus and directly measuring the fuel injector pulse width.
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