German transmissions company Voith Turbo is to launch a four-speed automatic gearbox for the bus market at EuroBus Expo 2012 in November.
The gearbox, dubbed DIWA.6, will – says the company – reduce noise emissions, provide better thermal stability, and improve efficiency.
The design changes to previous models include modifications to the gear pump, heat exchanger, converter pump, working pressure valve, and acoustics and housing. It also has stop-start preparation. Also, the new planetary carrier is lighter but maintains the same strength as previous models.
"The reduced weight of DIWA.6 will contribute to improved fuel efficiency of between three and five per cent," says John Domigan, Voith Turbo's sales and marketing manager.
"The new gearbox has a number of additional benefits," he adds. "For example, the operating pressure automatically adjusts to the output required during the stop-start cycle of a bus so that pressure can be reduced whenever possible."
