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throttle model gets real max engine flow 

(cherry picked from commit 6a05413e52)
This commit is contained in:
Matthew Kennedy 2023-03-16 01:11:19 -07:00 committed by Andrey
parent 3df13d10af
commit b0d43e2c18
5 changed files with 31 additions and 4 deletions
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22
firmware/controllers/algo/airmass/speed_density_airmass.cpp
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@ -4,6 +4,12 @@
AirmassResult SpeedDensityAirmass::getAirmass(int rpm) {
ScopePerf perf(PE::GetSpeedDensityFuel);
auto map = getMap(rpm);
return getAirmass(rpm, map);
}
AirmassResult SpeedDensityAirmass::getAirmass(float rpm, float map) {
/**
* most of the values are pre-calculated for performance reasons
*/
@ -13,8 +19,6 @@ AirmassResult SpeedDensityAirmass::getAirmass(int rpm) {
return {};
}
auto map = getMap(rpm);
float ve = getVe(rpm, map);
float airMass = getAirmassImpl(ve, map, tChargeK);
@ -32,6 +36,20 @@ AirmassResult SpeedDensityAirmass::getAirmass(int rpm) {
};
}
float SpeedDensityAirmass::getAirflow(float rpm, float map) {
auto airmassResult = getAirmass(rpm, map);
float massPerCycle = airmassResult.CylinderAirmass * engineConfiguration->specs.cylindersCount;
if (!engineConfiguration->twoStroke) {
// 4 stroke engines only do a half cycle per rev
massPerCycle = massPerCycle / 2;
}
// g/s
return massPerCycle * rpm / 60;
}
float SpeedDensityAirmass::getMap(int rpm) const {
float fallbackMap;
if (engineConfiguration->enableMapEstimationTableFallback) {

2
firmware/controllers/algo/airmass/speed_density_airmass.h
View File

@ -10,6 +10,8 @@ public:
{}
AirmassResult getAirmass(int rpm) override;
AirmassResult getAirmass(float rpm, float map);
float getAirflow(float rpm, float map);
float getMap(int rpm) const;

4
firmware/controllers/algo/fuel_math.cpp
View File

@ -171,6 +171,10 @@ AirmassModelBase* getAirmassModel(engine_load_mode_e mode) {
}
}
float getMaxAirflowAtMap(float map) {
return sdAirmass.getAirflow(Sensor::getOrZero(SensorType::Rpm), map);
}
// Per-cylinder base fuel mass
static float getBaseFuelMass(int rpm) {
ScopePerf perf(PE::GetBaseFuel);

2
firmware/controllers/algo/fuel_math.h
View File

@ -34,3 +34,5 @@ float getCylinderFuelTrim(size_t cylinderNumber, int rpm, float fuelLoad);
struct AirmassModelBase;
AirmassModelBase* getAirmassModel(engine_load_mode_e mode);
float getMaxAirflowAtMap(float map);

5
firmware/controllers/math/throttle_model.cpp
View File

@ -2,6 +2,8 @@
#include "throttle_model.h"
#include "fuel_math.h"
static const float pressureRatioCorrectionBins[] = { 0.53125, 0.546875, 0.5625, 0.578125, 0.59375, 0.609375, 0.625, 0.640625, 0.65625, 0.671875, 0.6875, 0.703125, 0.71875, 0.734375, 0.750, 0.765625, 0.78125, 0.796875, 0.8125, 0.828125, 0.84375, 0.859375, 0.875, 0.890625, 0.90625, 0.921875, 0.9375, 0.953125 };
static const float pressureRatioCorrectionValues[] = { 1, 0.9993, 0.998, 0.995, 0.991, 0.986, 0.979, 0.972, 0.963, 0.953, 0.942, 0.930, 0.916, 0.901, 0.884, 0.866, 0.845, 0.824, 0.800, 0.774, 0.745, 0.714, 0.679, 0.642, 0.600, 0.553, 0.449, 0.449 };
static float pressureRatioFlowCorrection(float pr) {
@ -141,6 +143,5 @@ float ThrottleModel::effectiveArea(float tps) const {
}
float ThrottleModel::maxEngineFlow(float map) const {
// TODO: implement this for real by consulting VE table, etc
return 0.5f;
return getMaxAirflowAtMap(map);
}