In the Helsinki demonstration, the innovations are implemented in commercial battery-electric buses, and validated in real-world conditions and in real revenue service on an existing bus lines in the citiy of Espoo and Helsinki.
EnergyStrategy and Auxiliaries
Adaptive control for auxiliaries in an electric bus (ADAPTAUX) aims to lower energy use of the auxiliaries. It is based on an innovative adaptation scheme that uses real-time data collection from the bus together with real-time route position, traffic situation and characteristics of the line ahead to determine the optimum use of the auxiliaries. A back-office system collects all the data on-line, processes it, and feeds the bus with optimised use profiles.
Intelligent Driver Support System applied to an electric bus (EDRIVEAID) is an innovative driver support system aiming at reducing energy use in electric busses. It is based on a system already verified on regular ICE-powered busses. The main principle of this technological innovation is to collect data from the bus, and together with real-time route position, traffic situation, schedule information and characteristics of the line ahead to provide the driver with a speed/acceleration suggestion that should lead to the lowest energy use. Simultaneously it should also ensure keeping up with the schedule. A back-office system collects all the data on-line, processes it, and feeds the driver’s display with optimised speed and acceleration information.
The functionality testing of the EDRIVEAID shall begin with a phase where only data collection is performed, and driving styles of the drivers are analysed. This “learn from the best – teach to the rest” principle shall identify the best driving characteristics, based on the collected data.
Propulsion technology: full-size battery-electric busses with opportunity charging, normal ICE/diesel busses running parallel on the same route as reference.
Number of buses: 4 commercial and 1 prototype/test bus (ADAPTAUX only).
Test site: urban line
The Helsinki Demonstration is led by VTT.