mirror of https://github.com/FOME-Tech/fome-fw.git
78 lines
2.2 KiB
C++
78 lines
2.2 KiB
C++
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#include "engine_configuration.h"
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#include "sensor.h"
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#include "dfco.h"
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bool DfcoController::getState() const {
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if (!engineConfiguration->coastingFuelCutEnabled) {
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return false;
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}
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const auto tps = Sensor::get(SensorType::DriverThrottleIntent);
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const auto clt = Sensor::get(SensorType::Clt);
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const auto map = Sensor::get(SensorType::Map);
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// If some sensor is broken, inhibit DFCO
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if (!tps || !clt || !map) {
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return false;
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}
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float rpm = Sensor::getOrZero(SensorType::Rpm);
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float vss = Sensor::getOrZero(SensorType::VehicleSpeed);
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bool mapActivate = map.Value < engineConfiguration->coastingFuelCutMap;
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bool tpsActivate = tps.Value < engineConfiguration->coastingFuelCutTps;
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bool cltActivate = clt.Value > engineConfiguration->coastingFuelCutClt;
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// True if throttle, MAP, and CLT are all acceptable for DFCO to occur
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bool dfcoAllowed = mapActivate && tpsActivate && cltActivate;
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bool rpmActivate = (rpm > engineConfiguration->coastingFuelCutRpmHigh);
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bool rpmDeactivate = (rpm < engineConfiguration->coastingFuelCutRpmLow);
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// greater than or equal so that it works if both config params are set to 0
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bool vssActivate = (vss >= engineConfiguration->coastingFuelCutVssHigh);
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bool vssDeactivate = (vss < engineConfiguration->coastingFuelCutVssLow);
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// RPM is high enough, VSS high enough, and DFCO allowed
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if (dfcoAllowed && rpmActivate && vssActivate) {
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return true;
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}
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// RPM too low, VSS too low, or DFCO not allowed
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if (!dfcoAllowed || rpmDeactivate || vssDeactivate) {
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return false;
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}
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// No conditions hit, no change to state (provides hysteresis)
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return m_isDfco;
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}
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void DfcoController::update() {
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// Run state machine
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bool newState = getState();
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// If fuel is cut, reset the timer
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if (newState) {
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m_timeSinceCut.reset();
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} else {
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// If fuel is not cut, reset the not-cut timer
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m_timeSinceNoCut.reset();
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}
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m_isDfco = newState;
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}
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bool DfcoController::cutFuel() const {
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float cutDelay = engineConfiguration->dfcoDelay;
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// 0 delay means cut immediately, aka timer has always expired
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bool hasBeenDelay = (cutDelay == 0) || m_timeSinceNoCut.hasElapsedSec(cutDelay);
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return m_isDfco && hasBeenDelay;
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}
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float DfcoController::getTimeSinceCut() const {
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return m_timeSinceCut.getElapsedSeconds();
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}
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