mirror of https://github.com/FOME-Tech/fome-fw.git
76 lines
2.5 KiB
C++
76 lines
2.5 KiB
C++
#include "fuel_computer.h"
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#include "map.h"
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EXTERN_ENGINE;
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mass_t FuelComputerBase::getCycleFuel(mass_t airmass, int rpm, float load) const {
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load = getTargetLambdaLoadAxis(load);
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float stoich = getStoichiometricRatio();
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float lambda = getTargetLambda(rpm, load);
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float afr = stoich * lambda;
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ENGINE(engineState.currentAfrLoad) = load;
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ENGINE(engineState.targetLambda) = lambda;
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ENGINE(engineState.targetAFR) = afr;
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ENGINE(engineState.stoichiometricRatio) = stoich;
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return airmass / afr;
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}
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FuelComputer::FuelComputer(const ValueProvider3D& lambdaTable) : m_lambdaTable(&lambdaTable) {}
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float FuelComputer::getStoichiometricRatio() const {
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// TODO: vary this with ethanol content/configured setting/whatever
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float primary = (float)CONFIG(stoichRatioPrimary) / PACK_MULT_AFR_CFG;
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// Config compatibility: this field may be zero on ECUs with old defaults
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if (primary < 5) {
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// 14.7 = E0 gasoline AFR
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primary = 14.7f;
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}
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// Without an ethanol/flex sensor, return primary configured stoich ratio
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if (!Sensor::hasSensor(SensorType::FuelEthanolPercent)) {
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return primary;
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}
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float secondary = (float)CONFIG(stoichRatioSecondary) / PACK_MULT_AFR_CFG;
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// Config compatibility: this field may be zero on ECUs with old defaults
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if (secondary < 5) {
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// 9.0 = E100 ethanol AFR
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secondary = 9.0f;
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}
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auto flex = Sensor::get(SensorType::FuelEthanolPercent);
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// TODO: what do do if flex sensor fails?
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// Linear interpolate between primary and secondary stoich ratios
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return interpolateClamped(0, primary, 100, secondary, flex.Value);
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}
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float FuelComputer::getTargetLambda(int rpm, float load) const {
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efiAssert(OBD_PCM_Processor_Fault, m_lambdaTable != nullptr, "AFR table null", 0);
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return m_lambdaTable->getValue(rpm, load);
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}
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float FuelComputer::getTargetLambdaLoadAxis(float defaultLoad) const {
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return getLoadOverride(defaultLoad, CONFIG(afrOverrideMode) PASS_ENGINE_PARAMETER_SUFFIX);
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}
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float getLoadOverride(float defaultLoad, afr_override_e overrideMode DECLARE_ENGINE_PARAMETER_SUFFIX) {
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switch(overrideMode) {
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case AFR_None: return defaultLoad;
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// MAP default to 200kpa - failed MAP goes rich
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case AFR_MAP: return Sensor::get(SensorType::Map).value_or(200);
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// TPS/pedal default to 100% - failed TPS goes rich
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case AFR_Tps: return Sensor::get(SensorType::Tps1).value_or(100);
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case AFR_AccPedal: return Sensor::get(SensorType::AcceleratorPedal).value_or(100);
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case AFR_CylFilling: return 100 * ENGINE(engineState.sd.airMassInOneCylinder) / ENGINE(standardAirCharge);
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default: return 0;
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}
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}
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