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I am examining the OBD2 info and trying to decide which data to use for my injection algorithm.
I thought i should share my way of thinking so some one can catch my brainfarts.
Objective: bring input air temp to 85 deg C. After maf so engine does not retard timing. (A good one??)
Intake air sensor says 4.5 g/s while idling. 100g/s full throttle.
Intake air temp about +5-10 deg C higher than ambient temp. It was 8.5 deg C outside and i saw 11-16 deg C on the sensor.
So
delta_t = 85-intake_temp
Injection_rate = delta_t * maf * k
Where k is a coefficient for injection that i kind of started calculating in previous posts.
Then the engineer in me started pondering and making things more complicated. Should i be looking at rpm and throttle position and/or fuel per minute (torque doesnt give a more precise fuel consumption figure) to predict the intake requirements an compensate for the time for the steam to reach the combustion chamber.
Right now the injection place will be after the maf. But i could go for egr valve aswell if some one says it will yield better results.
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