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Parametric CO2MPAS Inputs
stefanosts edited this page Aug 5, 2016
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The tables bellow summarize the main inputs / parameters used by Parametric CO2MPAS.
You can find further information concerning the calculation of the unknown parameters (see bellow) in the relevant section, here.
| Name | Values | Units | Comments | Parameter |
|---|---|---|---|---|
| Aspiration Method | Turbo or Natural Aspiration | - | Turbo concerns all charging technologies | engine_is_turbo |
| Cycle Type | WLTP or NEDC | - | cycle_type | |
| Dynamic Rolling Radius | mm | r_dynamic | ||
| Engine Capacity | cc | engine_capacity | ||
| Final Drive Ratio | - | final_drive_ratio | ||
| Fuel | - | fuel_type | ||
| Gear Box Ratios | - | gear_box_ratios | ||
| Gear Box Type | manual or automatic | - | gear_box_type | |
| Mass in Running Order | kg | running_order_mass | ||
| Nominal Power | kW | engine_max_power | ||
| Nominal Speed | RPM | engine_max_speed_at_max_power | ||
| Nominal Torque | Nm | engine_max_torque | ||
| Reference Mass | kg | vehicle_mass | ||
| Start Stop Technology | - | has_start_stop | ||
| Stroke | mm | engine_stroke | ||
| Unladen Mass | kg | unladen_mass | ||
| Velocity Profile | km/hr, sec, - | Velocity, Time, Gears | times, velocities, gears | |
| Wheel Drive | 2WD or 4WD | - | n_wheel_drive |
| Name | Values | Units | Comments | Parameter |
|---|---|---|---|---|
| Air Density | 1.2 | kg/m3 | air_density | |
| Auxiliaries Power Loss | 0 | kW | auxiliaries_power_loss | |
| Auxiliaries Torque Loss | 0.5 | Nm | auxiliaries_torque_loss | |
| Balance State of Charge | 80 | % | state_of_charge_balance | |
| Balance Window State of Charge | 1 | % | state_of_charge_balance_window | |
| Constant Angle Slope | 0 | radians | angle_slope | |
| Coolant Constant | 0.4 | - | engine_coolant_constant | |
| Coolant Flow | 0.008 | - | engine_coolant_flow | |
| Delta Speed Cold | 50 | RPM | delta_speed_cold | |
| Eco Mode for ATs | True | - | eco_mode | |
| Energy Recuperation System | 1 | - | has_energy_recuperation | |
| Full Load Curve | table | - | full_load_curve | |
| Heat to Engine Ratio | 0.35 | - | heat_to_engine | |
| Starting State of Charge | 80 | % | 99% when running NEDC | initial_state_of_charge |
| Starting Temperature | 23 | oC | 25 when running NEDC | initial_temperature |
| Temperature Increase when Engine is Off | 0 | oC | temperature_increase_when_engine_off |
The table bellow summarizes the parameters which are calculated from the pool of measured cars / based on empirical formulas before being used to the model.
The functions for the calculation of the main of those parameters are provided in the relevant section along with some comments, here.
| Name | Values | Units | Comments | Parameter |
|---|---|---|---|---|
| Alternator Charging Currents | A | Alternator ON/OFF & BERS - Function of Alternator Specs | alternator_charging_currents | |
| Alternator Efficiency | - | Average of Measured Cars | alternator_efficiency | |
| Alternator Nominal Power | kW | Average of Measured Cars | alternator_nominal_power | |
| Alternator Nominal Voltage | V | Average of Measured Cars | alternator_nominal_voltage | |
| AT Gear Box Models | - | Function of Average of Measured Cars and STV | CMV & MVL | |
| Battery Capacity | Ah | Function of Capacity | battery_capacity | |
| Electric Loads | kW | Engine ON/OFF, Function of Capacity | electric_load | |
| Engine Parameters | - | a, b, c, a2, b2, l, l2, t, trg - Function of Max Power, Capacity, Engine Type | co2_params | |
| Engine Thermostat Temperature | oC | From Engine Parameters | engine_thermostat_temperature | |
| Fuel Carbon Content | gCO2/gFuel | Function of Fuel | fuel_carbon_content | |
| Fuel Heating Value | kJ/kg | Function of Fuel | engine_fuel_lower_heating_value | |
| Gear-shifting | - | Only for Manuals - Calculated by the WLTP Tool | gears | |
| Idle Fuel Consumption | gr/sec | Function of Capacity | engine_idle_fuel_consumption | |
| Idle Speed | RPM | Function of Capacity | idle_engine_speed_median | |
| Max Battery Charging Current | A | Function of Capacity | max_battery_charging_current | |
| Max Engine Temperature | oC | Thermostat Temperature + 10oC | temperature_max | |
| Max Speed | RPM | Function of Nominal Speed | engine_max_speed | |
| Road Loads | - | F0, F1, F2, Calculates as Specified in the Relevant Section | f0, f1, f2 | |
| Speed Velocity Ratios | - | Function of Final Drive, Gear Box Ratios, Dynamic Rolling Radius | stv | |
| Starting Current Demand | A | Function of Capacity | start_demand | |
| Start Stop Activation Time | sec | Function of Capacity | start_stop_activation_time | |
| Temperature Threshold | oC | Thermostat Temperature - 5oC | temperature_threshold |