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Design of functional automotive components with requirements for cleanliness

: Rochowicz, Markus

Glanz, Carsten (Chairperson) ; Forschungsinstitut für Kraftfahrwesen und Fahrzeugmotoren, Stuttgart:
15th Stuttgart International Symposium Automotive and Engine Technology 2015. Documentation. Vol.1 : Stuttgart, 17. und 18. März 2015, Stuttgart
Stuttgart, 2015
Stuttgart International Symposium "Automotive and Engine Technology" <15, 2015, Stuttgart>
Conference Paper
Fraunhofer IPA ()
Automobilindustrie; Verschmutzung; Konstruktion; design; technische Sauberkeit; VDA 19; Entwicklung (Evolution)

The technical developments that have taken place in the automotive industry over the last few years explain why the issue of technical cleanliness has become so important in the manufacture of functionally-relevant components nowadays. Together with the customer’s growing demand for safety and driving comfort, the trend towards increasing performance densities whilst simultaneously adhering to ever-stricter environmental requirements remains unbroken. In consequence, the tolerances of aggregates built into vehicles are now very low and the parts are subjected to higher and higher stress levels, making them increasingly sensitive to particulate contamination. As a result, component cleanliness has become a quality feature that is now specified in customer-supplier agreements and has to be measured.
Consequently, today’s design engineers and developers are frequently faced with the task of specifying cleanliness limiting values for vehicle systems and components. They often lack the necessary knowledge or experience to know which limiting values will ensure functionality and be economically feasible. In the course of revising VDA 19 – a standard for inspecting the technical cleanliness of functionally-relevant automotive components – a corresponding informative chapter was added to provide assistance to design engineers and developers. The contents of this new chapter are presented in the article.