Engineering firm utilises Siemens Simcenter Amesim to produce intelligent transmissions that lead to greener city buses
Voith Turbo has improved design and reduced testing time of hydraulic valves with the help of Siemens PLM Software solution. The challenges were in improving the hydraulic valve behaviour of the four-speed automatic transmission and in introducing a systematic development process for mechatronic products. Voith Turbo’s automatic transmissions for buses – DIWA.3E and DIWA.5 – can be installed in any driveline bus and will enhance fuel economy, passenger comfort, operating efficiency and reliability. Voith Turbo has delivered over 150,000 Voith DIWA automatic transmissions to bus customers in Asia, Europe and the US.
Voith Turbo’s DIWA transmission is characterized by its unique differential torque converter principle: the lower-speed range of the DIfferential WAndler (converter) transmission replaces the first two gears of a standard automatic transmission. The differential torque converter principle functions on the basis of power separation: the engine power is split into mechanical and hydrodynamic components, which are later re-joined in the output drive.