|An Electrocity hybrid.|
Transport for London, the agency responsible for the city’s transport systems, has introduced six Wrightbus Electrocity series diesel-hybrid buses on an experimental basis to run alongside the Dennis Dart vehicles normally allocated to the route.
The single-deck Electrocity hybrids use an Enova 120kW series-hybrid drive coupled to Enova’s 60kW genset driven by a 1.9-liter Euro-4 common-rail diesel engine (earlier post). The Enova genset is designed to allow integrators to choose the engine best suited to their needs.
The buses have a range of 180–200 miles, with an average speed of 12–15 mph and a top speed of 40–45 mph.
The buses will run on the 360 route linking Elephant Castle and the Royal Albert Hall. An earlier test of a Wrightbus hybrid prototype in 2003 ran on a North London route.
Wrightbus estimates that the Electrocity vehicles will reduce CO2 emissions by at least 30% below Euro-3 conventional bus levels, and provide a significant reduction in other emissions, including NOX.
In earlier testing of an Electrocity bus at the Millbrook proving grounds in the UK, the hybrid emitted 740 g/km of CO2, compared to 1,050 g/km from a Euro-3 diesel that was, however, much lighter.
|Electrocity Emissions Tests, London Bus Cycle|
|Source: Millbrook Emissions Tests. Actual operational comparisons with convention bus will relate to Electrocity weight.|
|Euro-3 Diesel, 8.76 tonnes||0.53||1.3||18.6||1,050||n/a|
|Euro-3 Diesel, 14 tonnes||0.5||6||13.4||1,300||n/a|
|Electrocity, 12.5 tonnes||0||0.24||2.0||740||0.039|
(A hat-tip to Rhett Drew!)
Technology Information Programme Day (including presentation on Electrocity)