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11-23-2015

First Thermoplastic Oil Tank for Dry Sump Engines

New Serial Component for the Mercedes-AMG GT

The first-ever oil tank for dry sump ­engines is made of polyamide 66 with a 35 % glass fiber reinforcement, and weighs 59 % less than metal constructions hitherto used (figure: BASF)

The world’s first thermoplastic oil tank for dry sump engines has now been developed by Hummel-Formen, a brand by ElringKlinger AG, Lenningen, Germany. The reservoir weighs around 2.6 kg and is made of Ultramid A3WG7, a polyamide 66 with 35 % glass fiber reinforcement. Supplied by BASF SE, Ludwigshafen, Germany, the material is resistant to oil and thermal aging. Thanks to the glass fibers, the tank is 59 % lighter than previous steel or aluminum welded designs, and it has an integrated, improved and multi-functional oil separation system. The complex plastic component is used in the new Mercedes-AMG GT, which was made available in spring 2015 and which is the second car that AMG itself developed.

The oil reservoir has a smart geometry: It comprises ten different injection molded polyamide parts, which are connected to 13 more elements, e. g. sensors, sieves, covers and screws, to form one component. This is done by vibration welding and various snap-in joints. By utilizing the available space in an optimum way, a number of different functions could thus be integrated: In addition to merely storing the oil, the component assumes ventilation of the crankcase including oil separation, enables oil filling and changing, as well as control of the oil level and its quality. Moreover, it also slows down and roughly filters the incoming oil.

The Ultramid applied is highly resistant to oil and corrosion and thermally stable up to 180 °C (for short periods even up to 240 °C). Its high damping and stiffness contribute to favorable vibration and acoustic behavior. This means that the plastic oil tank is considerably quieter than metallic versions. The tried and tested PA66 also features the rigidity that is required for this application and which is necessary to withstand the requested burst pressures.

Translated from Kunststoffe 11/2015, p. 13

Company profile

BASF SE

Carl-Bosch-Str. 38
DE 67056 Ludwigshafen
Tel.: 0621 60-0
Fax: 0621 60-42525

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