Essen duobus switching between electric and diesel modes

  • 🎬 Video
  • ℹ️ Description
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Essen duobus switching between electric and diesel modes - seen in 1990 at the Viehofer Platz bus & tram stop which in 1991 was replaced by an extension to the underground / subway system - and for a while also served by kerb guided trolleybuses as well as trams.

More information on the 'dual-mode-bus' demonstration system which saw buses sharing part of the underground light rail system can be found here...

💬 Comments
Author

Thanks for posting this. = ) Please put up more trolleybuses videos.

Author — Jere Cullen

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Wann war das?? Welche Jahr?? Danke für super video!

Author — Влог Эренберга

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As long as the bus was stopped in the correct position it worked OK in the wind, especially as it was all mechanical - the bus driver stayed at the front of the bus, just pushed a few buttons!

Author — citytransportinfo

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Well, possibly... I know it's possible for regular articulated buses to have the engine either in the middle or at the back, after all. "So why not both?" :)

Still, if that's the case, it might still be able to use both systems if it was warranted for some reason (extra steep hill, for example, or to make it a "4x6" in winter), seeing as they'd be wholly separate right down to the mechanical side.

Author — mspenrice

Author

the buses were described as 200% power.

sometimes the diesel engine powered the bus, just like a normal mechanical diesel bus; sometimes the electricity powered the bus, just like a normal trolleybus.

I have a youtube film where I ride inside the bus (at the back) and you can here the difference

- - but you cannot feel the difference... it was much smoother as a trolleybus, less noise, hardly any vibrations.

Author — citytransportinfo

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Does that mean it could also run using both power sources somehow?

I wouldn't be surprised given your description if it was indeed running as a diesel-electric with the pantograph down, then. Some vibration from the engine itself, but still using all-electric drive to actually move along, so no jolting gearshifts and the like.

Author — mspenrice

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@tybruce37 Thanks - but what is Palikir?

Author — citytransportinfo

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yes, now the strassenbahn is underground.

Simon

Author — citytransportinfo

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Boston's MBTA does this too.  search for the MBTA silver line. 

Author — Sam Sitar

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sagts mal wie drahtet der ein ?
Mittels Joystick ? oder schafft der Bus das Automatisch ?

Author — Speedwagon1983

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I feel sure that it could only use one transmission at a time, and that the diesel engine powered the wheels directly.

It is possible that the diesel engine powered one set of wheels and the electric motor powered a different set of wheels (middle axle / rear axle). I do not know.

Author — citytransportinfo

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He´s got no mirror. It´s a defined position the bus has to stop at. do you see the metal-plates at 0:23? The poles aren´t set with that precision. the poles go a little bit to the right side and the metal-plates on the wires help the driver to set the poles exactly.

Author — Florijan Pavic

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Same way any other pantograph driven trolleybus, tram or train does...

Author — mspenrice

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sorry, that should be 'hear' and NOT 'here'

Author — citytransportinfo

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Does the diesel engine have a normal transmission, or is it just used as a generator? Hard to tell, here.

Author — mspenrice

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wenigstens ein museumsfahrzeug hätten die lassen sollen!

Author — afe31