Powertrain Test Beds for Transmission Calibration of Commercial Vehicles
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By means of new fully automatized test methods in combination with powertrain test beds, the effort for engine, transmission and vehicle control unit calibration can be reduced drastically compared to conventional calibration on the road. On the test bed, the vehicle or at least the powertrain is installed in a fixed position, and the tires are replaced by electric machines. The wheel speeds and torques are controlled according to a vehicle simulation model. Here, AVL compares measurement results of an agricultural tractor and a long-haul truck mounted on a test bed to road measurements. Thus, the feasibility of applying this calibration method for commercial vehicles is shown.
Calibration Effort is Increasing
Due to increasing complexity of powertrains, customer expectations and legal requirements, the calibration effort during vehicle development is steadily increasing. AVL recognized early on that a computer-aided and integrated development process for the entire drivetrain was...
The authors thank Gerhard Putz, Siegfried Puster and Jörg Schlager (all from the AVL-VSM Simulation Team) for supporting this publication. Also, they would like to thank Günther Peritsch (Lead Engineer for Commercial Vehicle Calibration) for his valuable working input.