The all-new, open platform, London double decker bus has been unveiled by Mayor Boris Johnson.
The ‘New Bus for London’ project was inspired by a design commissioned by Autocar in December 2007 and backed by Johnson, who was then the Conservative party candidate for London Mayor.
Technically, the bus is significantly more advanced than current double-decker buses. It is built around an aluminium spaceframe chassis and is powered by a ‘range-extender’ electric transmission.
The rear wheels are driven by an electric motor, which is powered by both a lithium-Ion battery pack and a 4.5-litre diesel engine/generator, which is mounted at the rear of the bus under the staircase.
Wrightbus sources say that the battery will not charged overnight, but will be kept in a constant state of readiness by the engine/generator.
The on-board computer will constantly decide how to mix and match power to the electric motor from either the battery, the generator or both.