Possible to set coefficient greater than 1 for RPM+TPS mode of Charge Temperature Estimation

[DenisMitchell]

fome-fw/firmware/integration/rusefi_config.txt

Lines 1154 to 1157 in fabfd6a

	float tChargeMinRpmMinTps;;"", 1, 0, 0, 3, 4
	float tChargeMinRpmMaxTps;;"", 1, 0, 0, 3, 4
	float tChargeMaxRpmMinTps;;"", 1, 0, 0, 3, 4
	float tChargeMaxRpmMaxTps;;"", 1, 0, 0, 3, 4

I'm not sure why the coefficient here can go to 3 - I'd think it should only be possible to define a maximum of 1, which to my understanding would mean that 100% of the calculated charge temperature would be coming from the IAT.

Looking at speed_density.cpp it looks like rpmMin and rpmMax might be hard-coded to 500RPM and 8000 RPM respectively, so setting a number higher than 1 could allow the coefficient to hit 1 (and be clamped to 1) at a lower RPM than 8000 RPM. I'm not sure if this intended behavior but it may be better to expose the values for low RPM and high RPM as user configurable settings.
reference: fome-fw/firmware/controllers/math/speed_density.cpp: lines 25, 26, 103-106

[DenisMitchell]

Reference implying coefficient should be 0-1:

fome-fw/firmware/controllers/math/speed_density.cpp

Lines 103 to 106 in fabfd6a

	// Interpolate between CLT and IAT:
	// 0.0 coefficient -> use CLT (full heat transfer)
	// 1.0 coefficient -> use IAT (no heat transfer)
	float Tcharge = interpolateClamped(0.0f, coolantTemp, 1.0f, airTemp, sdTcharge_coff);

possibly hard-coded minRPM and maxRPM values:

fome-fw/firmware/controllers/math/speed_density.cpp

Lines 25 to 26 in fabfd6a

	#define rpmMin 500
	#define rpmMax 8000