Browse Publications Technical Papers 2020-28-0346

An Optimal Method for Prediction of Engine Operating Points for an Effective Correlation in Fuel Economy Benchmarking 2020-28-0346

It is imperative that all automobile manufacturers conduct vehicle level benchmarking at the initial stage of any new project. From the benchmark information, the manufacturers can set relevant targets for their own vehicles under development. In this regard, an accurate prediction of the engine operating points can improve the correlation of the measured fuel economy of the benchmark vehicle. The present work describes a novel method that can be used for the accurate prediction of the engine operating points of any benchmark vehicle. Since the idea of instrumenting the crankshaft/driveshaft with torque transducers is a costlier and time-consuming process, the proposed method can be effective in reducing the benchmarking. Hence, the objective of this work is to develop a mathematical model to calculate the real-time engine operating points (engine speed and torque) using parameters like vehicle speed, accelerator pedal map, driveline inertia, vehicle coastdown force and gradient. This novel method is automated using a 1-dimensional mathematical tool Matlab. Moreover, the results of the predicted engine operating points are validated in one of the test vehicles of Mahindra and Mahindra by comparing with the torque values measured from the engine control unit (ECU). Furthermore, transient dynamometer measurement using AVL ISAC software was conducted and found that the measured operating points of the engine are having an excellent correlation of 98% with the predicted operating points. Thus, the proposed method could be considered as an optimal approach for the calculation of the real-time engine operating points of any of the benchmark vehicles.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:

On the Validity of Steady-State Gasoline Engine Characterization Methodology for Generation of Optimal Calibrations Used in Real World Driving


View Details


Fuel Economy Prediction of the Two Wheeler through System Simulation


View Details


Rapid Boundary Detection for Model Based Diesel Engine Calibration


View Details