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johnny: "Neither throttle angle nor RPM form a linear relationship with fuel usage."
I didn't mean to suggest that it was perfectly linear, but isn't it generally linear?
"If fuel consumption vs RPM were linear at WOT, you'd have a perfectly flat torque curve."
My casual observation, as I accelerate with WOT, while watching injector duty cycle (displayed on my dwell meter), is that RPM and duty cycle seem pretty linear. The numbers even coincide in a nice simple way, i.e., a duty cycle of 10% corresponds roughly to 1000 RPM. And a duty cycle of 30% corresponds roughly to 3000 RPM. Regardless of gear/vehicle speed, assuming that I'm using WOT.
Maybe this just means that my engine, at least in that range, has a fairly flat torque curve?
I also wonder if an engine with a wideband sensor would have more of tendency to behave this way (i.e., be more linear than one would expect).
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