InjectorModelBase Class Reference

#include <injector_model.h>

Inheritance diagram for InjectorModelBase:

Collaboration diagram for InjectorModelBase:

Public Member Functions
void	prepare () override
floatms_t	getInjectionDuration (float fuelMassGram) const override
float	getFuelMassForDuration (floatms_t duration) const override
virtual float	getInjectorFlowRatio ()=0
virtual void	updateState ()=0
virtual expected< float >	getFuelDifferentialPressure () const =0
virtual expected< float >	getFuelPressure () const =0
virtual float	getBaseFlowRate () const =0
virtual InjectorNonlinearMode	getNonlinearMode () const =0
floatms_t	getBaseDurationImpl (float fuelMassGram) const
virtual floatms_t	correctInjectionPolynomial (float floatms_t) const
virtual float	getSmallPulseFlowRate () const =0
virtual float	getSmallPulseBreakPoint () const =0
Public Member Functions inherited from IInjectorModel
virtual floatms_t	getDeadtime () const =0
Public Member Functions inherited from EngineModule
virtual void	initNoConfiguration ()
virtual void	setDefaultConfiguration ()
virtual void	onConfigurationChange (engine_configuration_s const *)
virtual void	onSlowCallback ()
virtual void	onFastCallback ()
virtual void	onEngineStop ()
virtual void	onIgnitionStateChanged (bool)
virtual bool	needsDelayedShutoff ()
virtual void	onEnginePhase (float, efitick_t, angle_t, angle_t)

Private Attributes
float	m_massFlowRate = 0
float	m_smallPulseBreakPoint = 0
float	m_smallPulseFlowRate = 0
float	m_smallPulseOffset = 0

Additional Inherited Members
Data Fields inherited from injector_model_s
float	m_deadtime = (float)0
float	pressureDelta = (float)0
float	pressureRatio = (float)0
float	pressureCorrectionReference = (float)0

Detailed Description

Definition at line 14 of file injector_model.h.

Member Function Documentation

correctInjectionPolynomial()

floatms_t InjectorModelBase::correctInjectionPolynomial ( float  floatms_t ) const

virtual

Definition at line 264 of file injector_model.cpp.

                                                                                    {
    if (baseDuration > engineConfiguration->applyNonlinearBelowPulse) {
        // Large pulse, skip correction.
        return baseDuration;
    }
 
    auto& is = engineConfiguration->injectorCorrectionPolynomial;
    float xi = 1;
 
    float adder = 0;
 
    // Add polynomial terms, starting with x^0
    for (size_t i = 0; i < efi::size(is); i++) {
        adder += is[i] * xi;
        xi *= baseDuration;
    }
 
    return baseDuration + adder;
}

Referenced by getBaseDurationImpl().

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getBaseDurationImpl()

floatms_t InjectorModelBase::getBaseDurationImpl

(

float

fuelMassGram

)

const

Definition at line 244 of file injector_model.cpp.

                                                                         {
    floatms_t baseDuration = fuelMassGram / m_massFlowRate * 1000;
 
    switch (getNonlinearMode()) {
    case INJ_FordModel:
        if (fuelMassGram < m_smallPulseBreakPoint) {
            // Small pulse uses a different slope, and adds the "zero fuel pulse" offset
            return (fuelMassGram / m_smallPulseFlowRate * 1000) + m_smallPulseOffset;
        } else {
            // Large pulse
            return baseDuration;
        }
    case INJ_PolynomialAdder:
        return correctInjectionPolynomial(baseDuration);
    case INJ_None:
    default:
        return baseDuration;
    }
}

Referenced by getInjectionDuration(), and InjectorModelWithConfig::getInjectionDuration().

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getBaseFlowRate()

virtual float InjectorModelBase::getBaseFlowRate ( ) const

pure virtual

Implemented in InjectorModelWithConfig.

Referenced by prepare().

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getFuelDifferentialPressure()

virtual expected< float > InjectorModelBase::getFuelDifferentialPressure ( ) const

pure virtual

Implemented in InjectorModelWithConfig.

getFuelMassForDuration()

float InjectorModelBase::getFuelMassForDuration ( floatms_t  duration ) const

overridevirtual

Implements IInjectorModel.

Definition at line 238 of file injector_model.cpp.

                                                                        {
    // Convert from ms -> grams
    return duration * m_massFlowRate * 0.001f;
}

getFuelPressure()

virtual expected< float > InjectorModelBase::getFuelPressure ( ) const

pure virtual

Implemented in InjectorModelWithConfig.

getInjectionDuration()

floatms_t InjectorModelBase::getInjectionDuration ( float  fuelMassGram ) const

overridevirtual

Implements IInjectorModel.

Reimplemented in InjectorModelWithConfig.

Definition at line 186 of file injector_model.cpp.

                                                                          {
    if (fuelMassGram <= 0) {
        // If 0 mass, don't do any math, just skip the injection.
        return 0.0f;
    }
 
    // Get the no-offset duration
    floatms_t baseDuration = getBaseDurationImpl(fuelMassGram);
 
    return baseDuration + m_deadtime;
}

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getInjectorFlowRatio()

virtual float InjectorModelBase::getInjectorFlowRatio ( )

pure virtual

Implemented in InjectorModelWithConfig.

Referenced by prepare().

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getNonlinearMode()

virtual InjectorNonlinearMode InjectorModelBase::getNonlinearMode ( ) const

pure virtual

Implemented in InjectorModelPrimary, and InjectorModelSecondary.

Referenced by getBaseDurationImpl(), and prepare().

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getSmallPulseBreakPoint()

virtual float InjectorModelBase::getSmallPulseBreakPoint ( ) const

pure virtual

Implemented in InjectorModelPrimary, and InjectorModelSecondary.

Referenced by prepare().

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getSmallPulseFlowRate()

virtual float InjectorModelBase::getSmallPulseFlowRate ( ) const

pure virtual

Implemented in InjectorModelPrimary, and InjectorModelSecondary.

Referenced by prepare().

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prepare()

void InjectorModelBase::prepare ( )

overridevirtual

Implements IInjectorModel.

Definition at line 6 of file injector_model.cpp.

                                {
    float flowRatio = getInjectorFlowRatio();
 
    // "large pulse" flow rate
    m_massFlowRate = flowRatio * getBaseFlowRate();
    m_deadtime = getDeadtime();
 
    if (getNonlinearMode() == INJ_FordModel) {
        m_smallPulseFlowRate = flowRatio * getSmallPulseFlowRate();
        m_smallPulseBreakPoint = getSmallPulseBreakPoint();
 
        // amount added to small pulses to correct for the "kink" from low flow region
        m_smallPulseOffset = 1000 * ((m_smallPulseBreakPoint / m_massFlowRate) - (m_smallPulseBreakPoint / m_smallPulseFlowRate));
    }
}

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updateState()

virtual void InjectorModelBase::updateState ( )

pure virtual

Implemented in InjectorModelWithConfig.

Field Documentation

m_massFlowRate

float InjectorModelBase::m_massFlowRate = 0

private

Definition at line 37 of file injector_model.h.

Referenced by getBaseDurationImpl(), getFuelMassForDuration(), and prepare().

m_smallPulseBreakPoint

float InjectorModelBase::m_smallPulseBreakPoint = 0

private

Definition at line 40 of file injector_model.h.

Referenced by getBaseDurationImpl(), and prepare().

m_smallPulseFlowRate

float InjectorModelBase::m_smallPulseFlowRate = 0

private

Definition at line 43 of file injector_model.h.

Referenced by getBaseDurationImpl(), and prepare().

m_smallPulseOffset

float InjectorModelBase::m_smallPulseOffset = 0

private

Definition at line 46 of file injector_model.h.

Referenced by getBaseDurationImpl(), and prepare().

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The documentation for this class was generated from the following files:

• controllers/algo/fuel/injector_model.h
• controllers/algo/fuel/injector_model.cpp