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Brisbane Transport, Mercedes Benz Citaro W1599

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Re: Brisbane Transport, Mercedes Benz Citaro W1599

Postby Swift » Fri Mar 29, 2019 3:29 pm

Megumi wrote:
Swift wrote:So now that we know that any regular length bus put on a 14.5m route is likely to fill up too quickly, is there any other reason on offer why drivers would hate it?
Sounds like someone is trying to discredit the bus for being fully shipped here and not produced by a beloved local body builder.


One more thing should be mentioned: the demonstrator Citaro was equipped with a Voith 4-speed gearbox which is not good at high-speed services as it makes the engine sounds noisy, such as any routes via the southern busway like 111, 150, 140, 130, etc. Most services via the busway are utilising ZF gearbox except some CNG buses (MAN CNG bendy), but it doesn't matter because the CNG engine is fine in high engine speed and even they need high engine speed for better torque.

Umm, that's easily addressed and doesn't exactly preclude the bus from consideration on it's own.
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Re: Brisbane Transport, Mercedes Benz Citaro W1599

Postby PoweredByCNG » Tue Apr 30, 2019 8:16 pm

Megumi wrote:One more thing should be mentioned: the demonstrator Citaro was equipped with a Voith 4-speed gearbox which is not good at high-speed services as it makes the engine sounds noisy, such as any routes via the southern busway like 111, 150, 140, 130, etc. Most services via the busway are utilising ZF gearbox except some CNG buses (MAN CNG bendy), but it doesn't matter because the CNG engine is fine in high engine speed and even they need high engine speed for better torque.


The CNG engine found on the Brisbane MANs are a low-revving engine with high stroke to bore ratio and high displacement. Peak torque is produced over a wide 700 rpm "window" that allows good performance no matter what gearbox is selected. The engine is not especially powerful compared to more modern diesel engines, but the performance figures are more than adequate for most city bus applications. The engine does not benefit from being revved high.

The Citaro had a much lower displacement engine, relatively short final drive ratio and low profile tyres. It was designed for urban environments with low average speeds. The above is indicative that high engine speeds are required for anything more than average road speeds before you even consider the different gearboxes, and yes, the Voith is at a distinct disadvantage in this case.
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Re: Brisbane Transport, Mercedes Benz Citaro W1599

Postby Megumi » Thu May 02, 2019 3:15 pm

Alright, so a couple of years have passed, is there any change in our imports rule?
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Re: Brisbane Transport, Mercedes Benz Citaro W1599

Postby 1of55 » Wed May 15, 2019 6:47 pm

So much in such a small space, but the engine compartment does extend up into the passenger area with the loss of two seats in rear row.
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Re: Brisbane Transport, Mercedes Benz Citaro W1599

Postby Swift » Wed May 15, 2019 9:12 pm

^ looks like you need to be a rocketry engineer to design all that!!
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Re: Brisbane Transport, Mercedes Benz Citaro W1599

Postby Megumi » Mon May 27, 2019 11:27 pm

https://www.mercedes-benz-bus.com/en_AU ... _385184368
The Citaro has been put on Mercedes-Benz.com.au for half of a year. Does it mean something?
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