engine_math.h File Reference

Detailed Description

Date

Jul 13, 2013

Author

Andrey Belomutskiy, (c) 2012-2020

Definition in file engine_math.h.

Data Structures
struct	BlendResult

Functions
void	setAlgorithm (engine_load_mode_e algo)
void	setFlatInjectorLag (float value)
floatms_t	getCrankshaftRevolutionTimeMs (float rpm)
floatms_t	getEngineCycleDuration (float rpm)
float	getFuelingLoad ()
float	getIgnitionLoad ()
ignition_mode_e	getCurrentIgnitionMode ()
void	setTimingRpmBin (float from, float to)
void	setSingleCoilDwell ()
angle_t	getPerCylinderFiringOrderOffset (uint8_t cylinderIndex, uint8_t cylinderNumber)
BlendResult	calculateBlend (blend_table_s &cfg, float rpm, float load)

Function Documentation

calculateBlend()

BlendResult calculateBlend	(	blend_table_s &	cfg,
		float	rpm,
		float	load
	)

Definition at line 161 of file engine_math.cpp.

                                                                      {
    // If set to 0, skip the math as its disabled
    if (cfg.blendParameter == GPPWM_Zero) {
        return { 0, 0, 0, 0 };
    }
 
    auto value = readGppwmChannel(cfg.blendParameter);
 
    if (!value) {
        return { 0, 0, 0, 0 };
    }
 
    // Override Y axis value (if necessary)
    if (cfg.yAxisOverride != GPPWM_Zero) {
        // TODO: is this value_or(0) correct or even reasonable?
        load = readGppwmChannel(cfg.yAxisOverride).value_or(0);
    }
 
    float tableValue = interpolate3d(
        cfg.table,
        cfg.loadBins, load,
        cfg.rpmBins, rpm
    );
 
    float blendFactor = interpolate2d(value.Value, cfg.blendBins, cfg.blendValues);
 
    return { value.Value, blendFactor, 0.01f * blendFactor * tableValue, load };
}

Referenced by BoostController::getOpenLoop(), getRunningAdvance(), BoostController::getSetpoint(), FuelComputer::getTargetLambda(), and AirmassVeModelBase::getVe().

Here is the call graph for this function:

Here is the caller graph for this function:

getCrankshaftRevolutionTimeMs()

floatms_t getCrankshaftRevolutionTimeMs

(

float

rpm

)

Returns

number of milliseconds in one crank shaft revolution

Definition at line 40 of file engine_math.cpp.

                                                   {
    if (rpm == 0) {
        return NAN;
    }
    return 360 * getOneDegreeTimeMs(rpm);
}

Referenced by getCoilDutyCycle(), getEngineCycleDuration(), and InjectionEvent::onTriggerTooth().

Here is the caller graph for this function:

getCurrentIgnitionMode()

ignition_mode_e getCurrentIgnitionMode

(

)

Returns

IM_WASTED_SPARK if in SPINNING mode and IM_INDIVIDUAL_COILS setting

engineConfiguration->ignitionMode otherwise

Definition at line 78 of file engine_math.cpp.

                                         {
    ignition_mode_e ignitionMode = engineConfiguration->ignitionMode;
#if EFI_SHAFT_POSITION_INPUT
    // In spin-up cranking mode we don't have full phase sync info yet, so wasted spark mode is better
    if (ignitionMode == IM_INDIVIDUAL_COILS) {
        bool missingPhaseInfoForSequential =
            !engine->triggerCentral.triggerState.hasSynchronizedPhase();
 
        if (engine->rpmCalculator.isSpinningUp() || missingPhaseInfoForSequential) {
            ignitionMode = IM_WASTED_SPARK;
        }
    }
#endif /* EFI_SHAFT_POSITION_INPUT */
    return ignitionMode;
}

Referenced by getCoilDutyCycle(), onTriggerEventSparkLogic(), prepareCylinderIgnitionSchedule(), prepareIgnitionSchedule(), and startDwellByTurningSparkPinHigh().

Here is the call graph for this function:

Here is the caller graph for this function:

getEngineCycleDuration()

floatms_t getEngineCycleDuration

(

float

rpm

)

Definition at line 33 of file engine_math.cpp.

                                            {
    return getCrankshaftRevolutionTimeMs(rpm) * (getEngineRotationState()->getOperationMode() == TWO_STROKE ? 1 : 2);
}

Referenced by getBaseFuelMass(), getInjectorDutyCycle(), getInjectorDutyCycleStage2(), and IFuelComputer::getTChargeCoefficient().

Here is the call graph for this function:

Here is the caller graph for this function:

getFuelingLoad()

float getFuelingLoad

(

)

Definition at line 47 of file engine_math.cpp.

                       {
    return getEngineState()->fuelingLoad;
}

Referenced by IdleController::getClosedLoop(), VvtController::getSetpoint(), handleGetDataRequest(), EngineState::periodicFastCallback(), and readGppwmChannel().

Here is the call graph for this function:

Here is the caller graph for this function:

getIgnitionLoad()

float getIgnitionLoad

(

)

Definition at line 51 of file engine_math.cpp.

                        {
    return getEngineState()->ignitionLoad;
}

Referenced by KnockController::getMaximumRetard(), EngineState::periodicFastCallback(), and readGppwmChannel().

Here is the call graph for this function:

Here is the caller graph for this function:

getPerCylinderFiringOrderOffset()

angle_t getPerCylinderFiringOrderOffset	(	uint8_t	cylinderIndex,
		uint8_t	cylinderNumber
	)

Gets phase offset for a particular cylinder's ID and number For example on 4 cylinder engine with firing order 1-3-4-2, this returns 0-180-360-540 for index 0-1-2-3 Cylinder number is used for per-cylinder adjustment, if you have an odd-fire engine (v-twin, V10, some v6, etc)

Definition at line 131 of file engine_math.cpp.

                                                                                       {
    // base = position of this cylinder in the firing order.
    // We get a cylinder every n-th of an engine cycle where N is the number of cylinders
    auto firingOrderOffset = engine->engineState.engineCycle * cylinderIndex / engineConfiguration->cylindersCount;
 
    // Plus or minus any adjustment if this is an odd-fire engine
    auto adjustment = engineConfiguration->timing_offset_cylinder[cylinderNumber];
 
    auto result = firingOrderOffset + adjustment;
 
    assertAngleRange(result, "getCylinderAngle", ObdCode::CUSTOM_ERR_CYL_ANGLE);
 
    return result;
}

Referenced by InjectionEvent::computeInjectionAngle(), and prepareCylinderIgnitionSchedule().

Here is the caller graph for this function:

setAlgorithm()

void setAlgorithm

(

engine_load_mode_e

algo

)

this method sets algorithm and ignition table scale

Definition at line 153 of file engine_math.cpp.

                                           {
    engineConfiguration->fuelAlgorithm = algo;
}

Referenced by cypressBoardDefaultConfiguration(), hellen112_17_boardDefaultConfiguration(), hellen88_boardDefaultConfiguration(), hellen_honda_k_boardDefaultConfiguration(), kinetis_boardConfigOverrides(), set201xHyundai(), setAlgorithmInt(), setDodgeNeonNGCEngineConfiguration(), setFordEscortGt(), setFrankensoConfiguration(), setTestVVTEngineConfiguration(), setVwAba(), subaru_eg33_boardDefaultConfiguration(), super_uaefi_boardDefaultConfiguration(), and uaefi_boardDefaultConfiguration().

Here is the caller graph for this function:

setFlatInjectorLag()

void setFlatInjectorLag

(

float

value

)

Definition at line 157 of file engine_math.cpp.

                                     {
    setTable(engineConfiguration->injector.battLagCorrTable, value);
}

Referenced by fuelBenchMode().

Here is the call graph for this function:

Here is the caller graph for this function:

setSingleCoilDwell()

void setSingleCoilDwell

(

)

see also setConstantDwell

Definition at line 58 of file engine_math.cpp.

                          {
    for (int i = 0; i < DWELL_CURVE_SIZE; i++) {
        config->sparkDwellRpmBins[i] = (i + 1) * 50;
        config->sparkDwellValues[i] = 4;
    }
 
    config->sparkDwellRpmBins[5] = 500;
    config->sparkDwellValues[5] = 4;
 
    config->sparkDwellRpmBins[6] = 4500;
    config->sparkDwellValues[6] = 4;
 
    config->sparkDwellRpmBins[7] = 12500;
    config->sparkDwellValues[7] = 0;
}

Referenced by setFordAspireEngineConfiguration(), and setFordEscortGt().

Here is the caller graph for this function:

setTimingRpmBin()

void setTimingRpmBin	(	float	from,
		float	to
	)

Definition at line 146 of file engine_math.cpp.

                                           {
    setRpmBin(config->ignitionRpmBins, IGN_RPM_COUNT, from, to);
}

Referenced by setDefaultIgnition().

Here is the call graph for this function:

Here is the caller graph for this function:

Go to the source code of this file.