Systems Integration for Vehicles

Specification and Feasibility

The Fraunhofer IVI carries out projects covering all aspects of systems integration, from simulation to demonstration and implementation to serial test runs.

With a broad overview of the current state of the art as well as future trends in the field of vehicle technologies, the feasibility of a project can be determined and the necessary expenditures can be estimated in a minimum of time.

The general process is as follows: The requirements made by customers, which are in most cases very specific, are transferred into functional descriptions. In the following step, the Fraunhofer IVI develops a detailed specification of the overall system as well as the resulting specifications for component suppliers, including the invitation of offers.

Characterization of Individual Components and Overall Integration

In order to achieve maximum dynamics and efficiency in the interaction of individual components, the components are measured on the institute’s own test stands (test stands for DC/DC converters, batteries, combustion engines, auxiliaries), engine maps are drawn up and controllers are developed.

After the individual components have been defined for a desired system, the actual system integration takes place. The Fraunhofer IVI reliably covers the entire process chain starting with the assembly of the overall system to the entry into service and the testing procedures. In addition, it offers support during regular operation in order to support and validate the development process.

Interface Definition

When combining components of different manufacturers in order to implement new functionalities, it is essential to put great care and attention into the definition of interfaces, both during the mechanical integration and mountingphase and in terms of electric compatibility.

The communication interfaces between individual components are also taken into consideration. The preferred strategy consists in designing components so that they are self-controlled and function independently as »black boxes«. Thus, communication between the individual components becomes simple, robust and narrow band-based.

Functional Safety

In working with public transport vehicles, high current traction systems and steering systems for utility vehicles, functional safety is highly important. The Fraunhofer IVI offers risk analyses according to relevant standards such as EN ISO 13849, EN/IEC 62061, EN/IEC 61508, EN/IEC 61508 and develops measures for creating and increasing safety integrity, realizing these measures in close cooperation with the customer.

During the implementation process, the Fraunhofer IVI uses SIL controllers of different manufacturers as well as certified software. The institute also assumes the responsibility for communicating with registration authorities and accompanies the development process until product maturity.