Wire instead of Diesel

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Current customers: in the past, trolleybuses, as this is still a Diesel-auxiliary drive for the sections of track without overhead contact line. In the future, you should be able to, thanks to built-in memory technology anywhere in Solingen, Germany exclusively electrically driving – without the overhead line network should be expanded.
Image: Edgar Schoepal

The climate protection makes Obus interesting. With electricity from the overhead line battery during the travel charge for distances without catenary. Solingen wants to abolish all diesel bus lines.

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          In the mountain town of big on the edge of the Rhine they affectionately call him-ironically the “bar taxi”. Since 1952, Solingen-Obus-city, operates for a long time by far the largest German network of trolley buses, as the buses are called with the catenary-scale pantograph rods international. In Germany, trolleybuses also only in Eberswalde and Esslingen. In Solingen, there are six lines across the city, a fleet of around 50 buses. As a management consultant recommended a few years ago in many other German cities long ago completed transition to cost-effective diesel buses, was a little Grumpy by the clientele – in so audible a manner, that the policy is buried in the plans.

          Today, in the fight against CO2 and other emissions, turns out to be, the insistence on the electrical bus system as an opportunity for a climate-neutral transport with the time-proven Trolleybus technology. With your “BOB”, the battery-trolleybus, want the town of Solingen, is the second half of the fleet, just under 50 diesel buses, replace. In a few years all of the current diesel emission lines are to be driven free – even on routes without power supply from the catenary. The idea arouses worldwide interest: The international Association “trolley:motion”, which lists exactly 299 cities, the in a sense the Obus of the rod. 21. 22. November, the experts are now meeting to an E-Bus conference in Solingen and evaluate the local plans.

          In principle, this works very simple: Since in Solingen, almost all the main roads are electrified to diesel buses, parts of the way below the top line. The BOBs can be put in the future the rods to the driving wire. You can’t get there, only the energy for the drive, but download at the same time on Board a high-performance battery. In addition, you is powered by the “Recuperation” the recovery of energy when braking. As soon as the route of the bus then leaves the overhead line network, the rods from the driver by the push of a button, and the battery takes over the supply of the electric drive.

          Premiere will be next year on a line, the two districts outside connects with the City and in the centre under the contact wire of trolleybus lines on the way. “We want to come to the System from the current Two-Bus System for the ecological A-Bus,” says Conrad Troullier, chief of the municipal Transport company. And that’s without the overhead line infrastructure to expand: “we must ensure that our current Diesel lines with the future BOB-Generation return about 30 percent of their route under the wire. Then we will have enough electricity for the non-electrified Außenäste.“ To do this, the entire line network to the test.

          Four Bob’s curves so far, by Solingen, in the practice test as a classic trolleybuses. Your special skills are, however, already asked: A line, for some years at both Ends of the stretch, with the upper line. So far, the bus driver for the onward journey to the auxiliary Diesel engine, with the new buses, electric go mobile.

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          The step to the electrical-Bus System in Solingen, Germany, a research project, which is funded with 15 million euros from the Federal Ministry of transport. Involved experts on Transport, energy providers, consultants and the Bergische University in the neighboring city of Wuppertal. It go, the mountain society for resource efficiency as one of the project partners, a “holistic approach to the combination and optimization of transport and energy issues”. Obus-chief Troullier speaks of the “sector, the coupling of transport and mobility”. In clear text: If more and more buses, energy from the power grid, going to an intelligent, digitally-controlled optimization of the supply is required, a new German Smart Grid. Under the Heading of “Smart Trolley System” is not sought for an Interaction with the medium-voltage grid of energy suppliers, the municipal utilities operating only consumers, but also the electricity supplier may be, for example, for E-cars and Pedelecs. Also conceivable is the reverse direction – that the Solinger citizens provide through photovoltaic systems power for your rod taxis.

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