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The driving comfort influences the customer purchase decision; hence it is an important aspect for the vehicle development. To better quantify the comfort level and reduce the experiment costs in the development process, the subjective comfort assessment by test drivers is nowadays more and more replaced by the objective comfort evaluation. Hereby the vibration comfort is described by scalar objective characteristic parameters that correlate with the subjective assessments. The correlation analysis requires the assessments and measurements at different vehicle vibration. To determine the objective parameters regarding the powertrain excitations, most experiments in the previous studies were carried out in several test vehicles with different powertrain units.

Cost- and time-efficient vehicle development is increasingly depending on the usage of adequate software tools to enhance effectiveness. The aim is a continuous integration of simulation tools and test environments within the vehicle development process in order to save time and costs. This paper introduces a procedure to reveal the cause of low-frequency powertrain vibrations and the influences on the dynamic behavior of a vehicle on a roller test bench. The affected longitudinal acceleration signal is an arbitrative criterion for the driveability assessment with AVL-DRIVE™, a well-known driveability analysis and development tool for the objective assessment concerning NVH and driveability aspects of full vehicles. These experimental studies are embedded into an approach, which describes the functional assembly of three applied test environments "road," "roller test bench" and "simulation" with according tools in order to facilitate an integrated driveability development process.

The purpose of the Institute of Machine Design and Automotive Engineering at the University of Karlsruhe, Germany is to carry out power train engineering as a closed process by means of modern design methodology. Because vehicles become more and more complex and the interaction of their different sub-systems is increasing, the integrated consideration of the complete system, sub-systems, parts and elements is one precondition in order to achieve a product development process that is as optimal as possible. An integrated development method in addition to real drive situations in road traffic contains experiments and simulations. In this article, a part of the integrated development method and environment of the institute is introduced. Using the Dual Mass Flywheel as an example, the practicality of the integrated method is proven.