Browse Publications Technical Papers 2019-26-0289
2019-01-19

Virual Road Torque Data Collection Application 2019-26-0289

The traditional method of collecting the road torque data of a vehicle is by instrumenting and running the vehicle on different road terrains. In recent times, we are receiving repeated requests to conduct these exercises for a vehicle program based for its application and different powertrain configurations. Each of these measurements cost and consumes valuable resources of the company in collecting the data and analyzing the data. These challenges triggered us to develop an application, which will give us quick estimate of the required parameters from road torque measurements in the absence of physical prototype. The developed application will reduce the time required to conduct road torque measurements by quickly assessing the change in drivability performance with respect to the changes in different driveline parameters and to reduce the repetition of physical measurements in the cases of update in engine calibration for the vehicles built for different applications. The scope of this work is to estimate the demand torque at the driver wheels, gearshift pattern and gear utilization percentage of a vehicle by taking the vehicle speed and altitude of a particular road segment as input along with some vehicle parameters like mass, frontal area, rolling resistance of tires and coefficient of drag. For analysis of changes in road torque (RLD) with changes in driveline components, engine performance calibration and different applications of vehicle. The developed application will help in assessing the changes in driveline duty cycle for change in powertrain parameters & application. The developed application is having a user interface and some control buttons to carry out the required calculations. Major Deliverables of this application are percentage gear utilization and duty cycle generation for durability testing of powertrain components. The results from the algorithm compared with the results of physical measurements & analysis and a fair amount of correlation achieved.

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