By the end of 2010, a total of 16 buses had gone into operation in various client fleets across Europe. Production and servicing personnel received continual training in working efficiently and safely with the new technology. During the reporting period, the vehicle concept, which had previously only been portrayed in prototype form, was further developed.
As part of the hybridisation process, design adjustments were made to the drive system components, e.g. the axles. In order to reduce fuel consumption, hybrid-specific adaptations were made in relation to the control and optimisation of auxiliary unit management. Optimisation of the heating and cooling circuits, adaptation of the HV system in terms of cable runs and distributor system and also battery development were further project outcomes during the reporting period.
The serial hybrid bus vehicle concept proved its suitability in daily use for the project clients. For public use of the vehicles at Hamburger Hochbahn, specific approval needed to be obtained pursuant to clause 21 of the German Road Traffic Licensing Regulations (StVZO). An application for European type approval was also prepared.
Further significant outcomes of the project include the measured data on emissions and consumption, diverse test results, technical drawings and parts lists and corresponding documentation.