C++ (Cpp) cc_minute_to_gramm_secondの例

コード例 #1

ファイル: speed_density.cpp プロジェクト: ngocphu811/rusefi

/**
 * @return value in seconds
 */
float sdMath(engine_configuration_s *engineConfiguration, float VE, float MAP, float AFR, float temp) {
	if (MAP < 0.001 || cisnan(MAP)) {
		warning(OBD_PCM_Processor_Fault, "invalid MAP value");
		return 0;
	}

	float injectorFlowRate = cc_minute_to_gramm_second(engineConfiguration->injectorFlow);
	float Vol = engineConfiguration->displacement / engineConfiguration->cylindersCount;
	return (Vol * VE * MAP) / (AFR * injectorFlowRate * GAS_R * temp);
}

コード例 #2

ファイル: speed_density.cpp プロジェクト: rusefi/rusefi

/**
 * @return per cylinder injection time, in seconds
 */
float sdMath(float airMass, float AFR DECLARE_GLOBAL_SUFFIX) {

	/**
	 * todo: pre-calculate gramm/second injector flow to save one multiplication
	 * open question if that's needed since that's just a multiplication
	 */
	float injectorFlowRate = cc_minute_to_gramm_second(get_injector_flow);
	/**
	 * injection_pulse_duration = fuel_mass / injector_flow
	 * fuel_mass = air_mass / target_afr
	 *
	 * injection_pulse_duration = (air_mass / target_afr) / injector_flow
	 */
	return airMass / (AFR * injectorFlowRate);
}

コード例 #3

ファイル: fuel_math.cpp プロジェクト: owenanthonyj/rusefi

/**
 * @return total duration of fuel injection per engine cycle, in milliseconds
 */
float getRealMafFuel(float airSpeed, int rpm DECLARE_ENGINE_PARAMETER_S) {
	if (rpm == 0)
		return 0;
	// duration of engine cycle, in hours
	float engineCycleDurationHr = 1.0 / 60 / rpm;

	float airMassKg = airSpeed * engineCycleDurationHr;

	/**
	 * todo: pre-calculate gramm/second injector flow to save one multiplication
	 * open question if that's needed since that's just a multiplication
	 */
	float injectorFlowRate = cc_minute_to_gramm_second(engineConfiguration->injector.flow);

	float afr = afrMap.getValue(airSpeed, rpm);
	float fuelMassGramm = airMassKg / afr * 1000;

	return 1000 * fuelMassGramm / injectorFlowRate;
}

コード例 #4

ファイル: speed_density.cpp プロジェクト: jon-weisz/rusefi

/**
 * @return per cylinder injection time, in seconds
 */
float sdMath(engine_configuration_s *engineConfiguration, float VE, float MAP, float AFR, float tempK) {
	if (MAP < 0.001 || cisnan(MAP)) {
		warning(OBD_PCM_Processor_Fault, "invalid MAP value");
		return 0;
	}

	/**
	 * todo: pre-calculate gramm/second injector flow to save one multiplication
	 * open question if that's needed since that's just a multiplication
	 */
	float injectorFlowRate = cc_minute_to_gramm_second(engineConfiguration->injector.flow);
	// todo: pre-calculate cylinder displacement to save one division
	float cylinderDisplacement = engineConfiguration->specs.displacement / engineConfiguration->specs.cylindersCount;
	float airMass = (cylinderDisplacement * VE * MAP) / (GAS_R * tempK);
	/**
	 * injection_pulse_duration = fuel_mass / injector_flow
	 * fuel_mass = air_mass / target_afr
	 *
	 * injection_pulse_duration = (air_mass / target_afr) / injector_flow
	 */
	return airMass / (AFR * injectorFlowRate);
}