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This article presents state-of-the art of modern hardware-in-the-loop systems for testing electronic chassis control systems in trucks and in truck/trailer combinations. In the last few years, hardware-in-the-loop has proven to be a time and cost-saving testing method for passenger cars, ideally complementing real driving tests. Due to the increasing functionality and complexity of chassis control systems in trucks, HIL will certainly prove to be a key technology for testing control systems of trucks.

This paper shows economical as well as technical aspects when using Realtime Simulation with Hardware in the Loop for developing and testing of complex mechatronical control systems within the different stages of truck development. The economical view gives an estimation on the improvement of the efficiency in the development. It shows the potential of the reduction of development costs and of the shortening of development periods by using Hardware in the Loop as method and in addition by installing true concurrent engineering as strategy. The technical view examines the possibilities of the improvement of functionality, quality and security of mechatronical control systems for trucks. It shows aspects like growing networking and communication, higher integration, early recognizing and avoiding of development errors, fail save behavior and product liability.