mirror of https://github.com/rusefi/rusefi-1.git
30 lines
807 B
C++
30 lines
807 B
C++
/**
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* @file speed_density_base.cpp
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*
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* Base for speed density (ie, ideal gas law) math shared by multiple fueling modes.
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*
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* @date July 22, 2020
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* @author Matthew Kennedy, (C) 2020
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*/
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#include "pch.h"
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#include "speed_density_base.h"
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/**
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* Derived via:
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* (8.31 J K mol^-1) <- ideal gas constant R
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* /
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* (28.97g mol^-1) <- molar mass of air
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* = 0.28705 J*K/g
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*/
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#define AIR_R 0.28705f
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mass_t idealGasLaw(float volume, float pressure, float temperature) {
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return volume * pressure / (AIR_R * temperature);
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}
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/*static*/ mass_t SpeedDensityBase::getAirmassImpl(float ve, float manifoldPressure, float temperature) {
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mass_t cycleAir = ve * idealGasLaw(engineConfiguration->specs.displacement, manifoldPressure, temperature);
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return cycleAir / engineConfiguration->specs.cylindersCount;
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}
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