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English   Alternative drive systems in Buses of Daimler AG – Part I
23.12.2008 von admin

Parts of this vision, from mechanical track guidance to tunnel operation, were realized by Daimler-Benz in Essen beginning in 1980, and later on under the keyword O-Bahn – though with diesel-powered buses – also in Adelaide, Australia. In 1984 the company also tested an electronic track guidance system in Fürth, Germany. Of course, the abundance of innovations also gave rise to a large number of unforeseen problems in detail. Today bus lanes and guidance systems have long since arrived on the regular bus service scene. The idea of a universal public transport conveyance could not gain general acceptance, however.

The testing of the combination of diesel-electric and battery-electric drive did not come to an end with the Esslingen dual-powered bus. In 1978, a five-year practical test commenced with 20 OE 305 hybrid electric buses in daily scheduled service in Stuttgart and Wesel. The partner in the tests was Gesellschaft für elektrischen Strassenverkehr (Association for Electric Road Transportation); the project was sponsored by the German Federal Ministry of Transportation and the states of Baden-Württemberg and North Rhine-Westphalia.

In the main the buses were identical with the predecessor, the OE 302. Fitted with a two-ton battery, they had a GVW of 19 tons so that they could carry up to 100 passengers. With heavier batteries, weighing 3.5 tons, the passenger capacity was reduced accordingly. The diesel engine generating the electricity was the 100 hp six-cylinder OM 352.

Mercedes-Benz O 305 TD DUO solo bus in regular service in Esslingen/Neckar, 1979.

In Esslingen meanwhile, beginning in 1979 four dual-mode buses saw operation, two of which operated outside the overhead cable network on battery, as usual, while the two others were equipped with a diesel engine. They were joined by an articulated bus with current collector and diesel engine. This happened to be the converted world-first articulated pusher bus which the technical director of Hamburger Hochbahn, O.W.O. Schultz, had developed in Falkenried in 1976 and introduced in Hamburg in the following year.

Mercedes-Benz O 305 GTD DUO articulated bus in regular service in Esslingen/Neckar, 1979.

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