fan_control.cpp

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#include "pch.h"
 
#include "fan_control.h"
 
#include "bench_test.h"
 
PUBLIC_API_WEAK bool fansDisabledByBoardStatus() {
  return false;
}
 
PUBLIC_API_WEAK bool fansEnabledByBoardStatus() {
  return false;
}
 
bool FanController::getState(bool acActive, bool lastState) {
    auto clt = Sensor::get(SensorType::Clt);
    auto vss = Sensor::get(SensorType::VehicleSpeed);
 
#if EFI_SHAFT_POSITION_INPUT
    cranking = engine->rpmCalculator.isCranking();
    notRunning = !engine->rpmCalculator.isRunning();
#else
    cranking = false;
    notRunning = true;
#endif
 
    disabledBySpeed = disableAtSpeed() > 0 && vss.Valid && vss.Value > disableAtSpeed();
    disabledWhileEngineStopped = notRunning && disableWhenStopped();
    brokenClt = !clt;
    enabledForAc = enableWithAc() && acActive;
    hot = clt.value_or(0) > getFanOnTemp();
    cold = clt.value_or(0) < getFanOffTemp();
 
    if (fansEnabledByBoardStatus()) {
        radiatorFanStatus = (int)RadiatorFanState::BoardForcedOn;
        return true;
    } else if (cranking) {
        // Inhibit while cranking
        radiatorFanStatus = (int)RadiatorFanState::Cranking;
        return false;
    } else if (disabledWhileEngineStopped) {
        // Inhibit while not running (if so configured)
        radiatorFanStatus = (int)RadiatorFanState::EngineStopped;
        return false;
    } else if (disabledBySpeed) {
        // Inhibit while driving fast
        radiatorFanStatus = (int)RadiatorFanState::VehicleIsTooFast;
        return false;
  } else if (fansDisabledByBoardStatus()) {
    radiatorFanStatus = (int)RadiatorFanState::BoardStatus;
        return false;
    } else if (brokenClt) {
        // If CLT is broken, turn the fan on
        radiatorFanStatus = (int)RadiatorFanState::CltBroken;
        return true;
    } else if (enabledForAc) {
      radiatorFanStatus = (int)RadiatorFanState::AC;
        return true;
    } else if (hot) {
        radiatorFanStatus = (int)RadiatorFanState::Hot;
        return true;
    } else if (cold) {
        radiatorFanStatus = (int)RadiatorFanState::Cold;
        return false;
    } else {
      radiatorFanStatus = (int)RadiatorFanState::Previous;
        // no condition met, maintain previous state
        return lastState;
    }
}
 
void FanController::onSlowCallback() {
#if EFI_PROD_CODE
    if (isRunningBenchTest()) {
      radiatorFanStatus = (int)RadiatorFanState::Bench;
        return; // let's not mess with bench testing
    }
#endif
 
    bool acActive = engine->module<AcController>()->isAcEnabled();
 
    auto& pin = getPin();
 
    bool result = getState(acActive, pin.getLogicValue());
 
    m_state = result;
 
    pin.setValue(result);
}
 
void FanController::setDefaultConfiguration() {
    engineConfiguration->fanOnTemperature = 92;
    engineConfiguration->fanOffTemperature = 88;
    engineConfiguration->fan2OnTemperature = 95;
    engineConfiguration->fan2OffTemperature = 91;
}