/ 71 INTEGRATION TESTS High dynamic integration testbeds (powertrain-in-the-loop and vehicle-in the-loop) are used for testing the powertrain system in virtual drive tests. Suitable simulation models for the driver, vehicle, road and environment make it easy to bring real driving maneuvers from the drive test into the laboratory environment of the high dynamic integration testbed. This sort of testbed is based on high dynamic electric dynamometers, built to have a similar inertia on the wheel. Simulation models then calculate the respective load of each wheel during tire-road contact. The dynamometers then apply this load. This ensures the dynamic behavior of the powertrain on the testbed is identical in the drive test. This provides insights at an early development stage that would once have required time-consuming and cost-intensive drive tests. BENEFITS AT A GLANCE • Endurance strength testing in continuous unmanned operation, 24/7 • Integration tests in the virtual drive test with simulation of driver, vehicle, road and environment • Transmission system calibration and drivability tuning at an early development stage without the need for a vehicle prototype • Transmission and driveline testing with a directly connected prime mover as substitute for the IC engine PERFORMING Example applications include: • Vibration testing • Optimizing gear shift comfort • Optimizing control unit functions • Drivability testing • Recuperation • Drive maneuvers on various surfaces to validate the overall system behavior • Load cycle change testing (tip-in/back-out) • Realistic curving AVL testbeds with prime mover as IC engine substitute for front-wheel drive vehicles with transversely mounted engine. AVL all-wheel testbed with prime mover for vehicles with longitudinally mounted engine
Solutionskatalog2014_E
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