In the beginning of the week the German public transport organization VDV arranged the “Landshuter Omnibustage”. Landshut is a picturesque town close to Munich. The sun was shining and it was a warm day even for soon being mid-September. Prof. Ralph Pütz hosted the sessions and kept the dialogue going.
Future challenges were identified. And, Euro VI is no doubt one to take seriously. Tail pipe emissions for low load cycles, which buses are frequently using, is one thing. Fuel quality, in particular the specification of biofuels, is another. Even when biofuels meet the specification, particulate filters, oxidation catalysts and SCR catalysts are endangered, in particular when the durability demand is considered.
Energy efficiency is another issue. Particulate filters needs to be regenerated to remove the collected soot, and exhaust heat management needs to be realized with great care to balance ash melting and the associated solid state reactions with the filter medium with the completeness of the regeneration. The heat management will have a price in fuel consumption.
The meeting offered an excellent combination of in depth discussions and long term foresight inspiration.
I was invited to speak on the subject of Euro VI and future hybrid technology. Volvo Bus now has three years of experience and many hundred hybrid buses on the streets. We have achieved the fortunate position where we can secure a reliable combination of the Euro VI engine technology in combination with electrical hybrid drivetrains to realize the highest reliability.