DIWA.6

DIWA.6 – Less Consumption, Lower Emissions

Voith's DIWA.6 is our response to the increased demand for lower fuel consumption and lower emissions. The intelligent start-up management and the need-based reduction of the operating pressure reduce fuel consumption by up to 5%! That protects the environment with lower CO2 emissions. The newly designed housing and an optimized operating strategy ensure lower noise emissions.

Supplemented by the electronic E 300.1 control , the SensoTop topography-dependent gear-shifting program, the ALADIN diagnosis software and Stop-Start Technology, the DIWA.6 automatic transmission is the perfect example of an economical city bus transmission.

Another important characteristic of DIWA,6 is the need-based reduction of operating pressure. Full operating pressure is only produced if it is really necessary. This significantly increases transmission efficiency.
DIWA.6 combines the Automatic Neutral Shift ANS with intelligent start-up management: Sensors prevent the engine from working against the still-active brake during start-up and thus consuming unnecessary fuel.

Contact

Voith Turbo GmbH & Co. KG
Commercial Vehicles
Alexanderstraße 2
89522 Heidenheim, Germany

Tel. +49 7321 37 8579
Fax +49 7321 37 7818
sales-diwa@voith.com

Stop-Start Technology 

DIWA 6

In addition to more profitability due to the markedly reduced fuel consumption, the new and unique Stop-Start Technology for the Voith DIWA.6 transmission also offers a tangible added value to passengers, drivers and pedestrians thanks to to the reduced noise during stopping times. This expansion of our existing transmission leads directly to a reduction of CO2, NOx, particulate and noise emissions, which is a significant contribution to environmental sustainability. This enhancement of the DIWA.6 is an unparalleled and simple extension of an existing transmission for urban bus transportation, which increases the attractiveness of public transport, in addition to the economic benefits from the reduction of operating costs.

Find out more about our new Stop-Start Technology:

www.voith.com

Your benefits at a glance

  • Higher efficiency
  • Lower noise emissions
  • Lower fuel consumption
  • Lower CO2-emissons

Design

The design of the DIWA.6 transmission is simple, logical and clear. The main piece is the hydrodynamic offset converter. The pump brake, coupling, differential transmission and input coupling as well as the coupling for the overdrive are located to the front of it.

DIWA.6 Design
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Differential converter principle

starting range

All Voith DIWA transmissions work according to the power distribution principle. It provides even start-up and acceleration through a speed range in which other drives would have to shift 2 to 3 times.

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Retarder

The differential converter, the core component of the DIWA transmission, works as a retarder when braking. Thus, it enables driving and braking with a hydraulic circuit.

The brake performance for average and high speeds is increased by up to 30% in comparison to conventional automatic transmissions.

The advantage is that the operating brake is relieved, thus reducing brake wear.

By constantly filling the converter with oil, a faster response time is achieved when activating the retarder. To deactivate the retarder, the transmission control merely opens a coupling. The retarder responds in a matter of seconds; thus, driving safety is increased.

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Stop-Start Technology

City buses spend up to 40% of their operating time in idling mode. The new Stop-Start Technology from Voith for the DIWA.6 transmission offers an ideal enhancement for these stop-times. This technology, already established in the passenger car field, contributes considerably to reducing fuel consumption when used together with an engine that is equipped with the same function. Test results show a fuel savings potential of 10-12% (depending on application). The great advantage here is that this requires only a software enhancement, with no need to modify the design of the existing DIWA.6 transmission. The Voith DIWA.6 can achieve the spectacular value of up to 60 seconds shutdown time without any effect on start-up readiness. This technology is already in use in more than 100 vehicles in the UK and has been proving its capabilities and reliability very successfully since July 2015.


Benefits of the DIWA.6 Stop-Start Technology
In addition to more profitability due to the markedly reduced fuel consumption, the new and unique Stop-Start Technology for the Voith DIWA.6 transmission also offers a tangible added value to passengers, drivers and pedestrians thanks to the reduced noise during stopping times. This extension of our existing transmission leads directly to a reduction of CO2, NOx, particulate and noise emissions, which is a significant contribution to environmental sustainability. This enhancement of the DIWA.6 is an unparalleled and simple extension of an existing transmission for urban bus transportation, which increases the attractiveness of public transport, in addition to the economic benefits from the reduction of operating costs

DIWA

  • DIWA transmission supports a stop-time up to 60 sec. without influence of the driveline’s readiness.
  • A reduction from 10 to 12 % fuel consumption can be achieved, depending on application.
  • Proven in service: Over 100 buses have already been equipped with Stop-Start Technology.

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SensoTop shifting program

Zur Großansicht

The topography-dependent shifting program SensoTop adjusts all gear-shifting points to the acceleration, line profile and load.

A tilt sensor delivers to the transmission control the necessary information for the stepless adjustment of gear-shifting points. The driver has the best engine power available for level roads or mountainous terrain and heavy or light loads.

Practice shows that depending on topography and vehicle use, you can save up to 7% in fuel. A significant contribution to economical and environmentally-friendly vehicle operation.

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Stay Green at every Red Light. Experience the new DIWA.6 Start-Stop Technology

Stay Green at every Red Light. Experience the new DIWA.6 Start-Stop Technology

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Better on the Road All Along the Line.  DIWA Efficiency Package

Better on the Road All Along the Line. DIWA Efficiency Package

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SensoTop

SensoTop

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