INDUSTRIAL VEHICLE BUSINESS UNIT BUS ENERGY MANAGEMENT Virtual testing on bus lines for vehicle/fleet optimization MOTIVATIONS (why?) SORT tests are seldom representative of real on-road energy consumption, and don’t consider payload change, driver style or A/C consumption. In-line consumption tests require much time and money to give statistically strong results. Electric buses need a careful and in-depth energy evaluation and management. Energy/fuel consumption of buses is a key-parameter for both producers and transport companies: • Which bus model should I offer in the tender for this • How can I estimate the energy consumption of this on-road mission? bus before putting it on the road? • How much does the consumption change with • How can I be sure that the vehicle with best SORT another final axle ratio? Is it the same with empty values would be the best on my bus line? or full-load vehicle? • I have many lines: how can I handle my bus fleet to • Which engine power rate should I use to lower the optimize the energy consumption? Is better to use a energy consumption? And what will be the impact CNG, diesel or hybrid vehicle in this line? on the performances? • I want to buy an electric vehicle: is it suitable for my • Is this battery layout suitable with an aggressive or bus line? How often should I recharge it? Which is the ecologic driver? And with a low or high traffic? energy saving respect to a diesel vehicle? BUS PRODUCERS TRANSPORT COMPANIES SOLUTIONS (what?) To exploit the numerical simulation to estimate the on-line energy consumption of a bus. The energy simulation tool is composed of: vehicle model (*) generator: using general data (geometry, masses, rear axle ratio, gear ratios…); vehicle model (*) calibrator: using measured data from real SORT/CUNA tests; scenario generator: line: stops, pedestrian crosses, traffic lights traffic: using statistics from database; virtual driver: simulates the behaviour of a human driver. (*) The numerical model can be replaced with the real vehicle using a test-bench with Hardware-In-The-Loop approach. www.si-ita.it [email protected] +39. 0341. 320 755 BUS ENERGY MANAGEMENT BU1MA0 Rev.3 200507 PROVIDED SERVICES (how?) APPLICATIONS (when?) vehicle design “tailored” to an on-road mission; bus fleet optimization to save cost and energy; bus benchmark during tenders; electric/hybrid vehicle design, for both battery and recharging strategy VALUABLES In-line energy consumption, bus benchmark, sensitivity analysis on vehicle parameters, electric bus design. https://www.youtube.com/playlist?list=PLoLfq1rcT3EoP8F8aLd-yNGpZU-YW6xqt www.si-ita.it [email protected] +39. 0341. 320 755
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