/**
* Copyright (C) 2013 - 2015 the enviroCar community
*
* This file is part of the enviroCar app.
*
* The enviroCar app is free software: you can redistribute it and/or
* modify it under the terms of the GNU General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The enviroCar app is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
* Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with the enviroCar app. If not, see http://www.gnu.org/licenses/.
*/
package org.envirocar.core.trackprocessing;
import org.envirocar.core.entity.Car;
import org.envirocar.core.entity.CarImpl;
public class CalculatedMAFWithStaticVolumetricEfficiency extends
AbstractCalculatedMAFAlgorithm {
private static final double GAS_CONSTANT = 8.3144621;
private static final double MOLECULAR_MASS_OF_AIR = 28.9644;
private double volumetricEfficiency = 85.0d;
private Car car;
public CalculatedMAFWithStaticVolumetricEfficiency(Car car) {
this.car = car;
}
@Override
public double calculateMAF(double rpm, double intakeTemperature,
double intakePressure) {
//calculate alternative maf from iat (convert to °K), map, rpm
double imap = rpm * intakePressure / (intakeTemperature + 273.15d);
//VE = 85 in most modern cars
double calculatedMaf = imap / 120.0d * this.volumetricEfficiency / 100.0d * CarImpl
.ccmToLiter(this.car.getEngineDisplacement()) * MOLECULAR_MASS_OF_AIR / GAS_CONSTANT;
return calculatedMaf;
}
}