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cddcd0d88c
* Multichannel AFR * heater: fixes for multi channel mode * f1_dual: fix configuration names * pump_dac: fixes for multi-channel mode * pwm: fixes for multichannel mode * pump_control: reference instead of pointer * sampling: reference instead of pointer * heater_control: reference instead of pointer * sampling: comment about heater/battery voltage * f0_module: fixes for multi-channel update * f1_rev2: fix for multichannel AFR * hello rev 3 Co-authored-by: rusefillc <sdfsdfqsf2334234234>
32 lines
765 B
C++
32 lines
765 B
C++
#include "lambda_conversion.h"
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#include "sampling.h"
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static float GetPhi(float pumpCurrent)
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{
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// Maximum lambda ~2
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if (pumpCurrent > 1.11f)
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{
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return 0.5f;
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}
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// Minimum lambda ~0.5
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if (pumpCurrent < -3.5f)
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{
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return 1 / 0.5f;
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}
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// This estimation is accurate within 0.5% from 0.8 to 1.0, and 0.01% from 1 to 1.2 lambda when compared to the lookup table in the Bosch datasheet
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// This error is less than half of the claimed accuracy of the sensor itself
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float gain = pumpCurrent < 0 ? -0.28299f : -0.44817f;
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return gain * pumpCurrent + 0.99559f;
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}
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float GetLambda(int ch)
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{
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float pumpCurrent = GetPumpNominalCurrent(ch);
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// Lambda is reciprocal of phi
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return 1 / GetPhi(pumpCurrent);
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}
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