London introducing hybrid double-decker buses
Yesterday at Alexandra Palace, six Volvo B5L hybrid double-decker buses debuted in London. The buses have already started service on Route 141 in the capital.
The buses feature Volvo's I-SAM parallel hybrid system that is comprised of a starter motor, drive motor, and alternator. The system supports regenerative breaking, electric launch and assist and electrification of power steering, air compressor and air conditioning. The buses will be able to go up to 12 mph without using their diesel engines, which, on a route with a lot of stops like the one these buses are deployed on, could result in large fuel savings.
No numbers on fuel economy or emissions reductions have been released yet, but Volvo's hybrid single deck buses in Gothenburg, Sweden, have achieved a 30 percent improvement in fuel economy on routes with longer intervals between stops than those in London.
via Volvo and Treehugger
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