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Forums
Engineering
Mechanical Engineering
"Engine fuel consumption map" without the torque possible?
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[QUOTE="joker1319, post: 6111470, member: 655566"] Hello, I am currently facing a problem. I'm on a project and trying to create an "engine fuel consumption map (engine torque / engine speed)" among other things. Unfortunately, the engine torque is not measured in my measurements. More specifically, the "actual engine - percent torque (OBD PID 98)" outputs only "-125". Therefore, I wonder if it is possible to derive the torque (approximately) with the following information I have: [LIST] [*]Velocity GPS km/h [*]Velocity ECU km/h [*]Engine Speed rpm [*]Ambient Temperature degC [*]Relative Humidity % [*]Ambient Pressure kPa [*]GPS Altitude m [*]Altitude Amb, Pressure m [*]Exhaust Temperature degC [*]Exhaust Mass Flow g/s [*]Exhaust Volume Flow (1atm 20degC) m3/s [*]Coolant Temperature degC [*]Intake Manif, Pressure Abs kPa [*]Intake Manif, Pressure Rel kPa [*]Intake Manif, Temperature degC [*]Oil Temperature degC [*]Throttle Position % [*]Intake Mass Flow g/s [*]OBD_Accelerator_Pedal_Position_D_(PID_73) % [*]OBD_Ambient_air_temperature_(PID_70) °C [*]OBD_Barometric_pressure_(PID_51) kPa [*]OBD_Calculated_engine_load_value_(PID_4) % [*]OBD_Commanded_throttle_actuator_(PID_76) % [*]OBD_Control_module_voltage_(PID_66) V [*]OBD_Relative_throttle_position_(PID_69) % [*]OBD_Run_time_since_engine_start_(PID_31) s [*]va m2/s3 [*]va_pos m2/s3 [*]Acceleration m/s² [*]m_CO2 g [*]m_CO g [*]m_NOx g [*]n_PN - [*]y_CO2 % [*]y_CO ppm [*]y_NO ppm [*]y_NO2 ppm [*]y_NOx ppm [*]y_O2 % [*]ndot_PN #/s [*]mdot_CO2 g/s [*]mdot_CO g/s [*]mdot_NO g/s [*]mdot_NO2 g/s [*]mdot_NOx g/s [*]mdot_O2 g/s [/LIST] Some people claim that with the "OBD_Calculated_engine_load_value" somehow the engine torque can be derived. Unfortunately I have not yet found the formula of "Calculated_engine_load" which does not include the torque. [/QUOTE]
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"Engine fuel consumption map" without the torque possible?
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