Technical questions about buses , please post here.
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Is it qualified for low steps buses?Originally posted by carbikebus:Thanks so thats mean it can't have exit doors before the rear axles right?(Like VO/LO 3X Where the exits are nearby)
Another Questions:Is the Volvo B6R Still in production?I'm confused whether it's 10 or 10.5 m euro 2 midibus.What about the technical specs?Can MAN 18.250/280 Uses ZF Gearbox instead of Voith?
Thanks
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void
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I just don't get it... why does OF1417s made roaring engine sound when the bus slows down?? No other bus model had this roaring sound except OF1417s and that makes them unique and easy to be spotted. OF1413s did not have that roaring sound although manufactured by the same company
OF1417s used automatic gearbox right? Any kind soul kindly enlighten me, thanx. Even up till now, the roaring sound still amuses me in my mind 
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I wonder but why VO3X after some time on expressway, instead of roaring, actually becomes rather quiet, even though the DD may be speeding, had the same experience many times already. Switching off of turbo-charger? For only when the bus slows down considerably, as in gearing down will the VO3X start roaring again.
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i think cos the rpm of engine slows down at that gear at that particular speed maOriginally posted by SBS1908B:I wonder but why VO3X after some time on expressway, instead of roaring, actually becomes rather quiet, even though the DD may be speeding, had the same experience many times already. Switching off of turbo-charger? For only when the bus slows down considerably, as in gearing down will the VO3X start roaring again. -
Nah.......the pitch of the engine sound never change, only the amplitude of the sound wave (loudness) change.Originally posted by SBS2764S:i think cos the rpm of engine slows down at that gear at that particular speed ma -
actually pitch, for turbo-charged engines and big hub reducers. without turbo, it's only the speed of the turbo.Originally posted by SBS1908B:Nah.......the pitch of the engine sound never change, only the amplitude of the sound wave (loudness) change.
regarding low pitch for 4th gear on VO3x's, this is common on certain 94xx-96xx (actually more of 96xx and very few 94xx and 95xx) where the engine picks up faster (due to some mod maybe) and ends up changing to 4th gear at a speed (about 55kph instead of the normal 50kph) close to the speed limiter hence it has a low rpm and sounds very quiet. the downside is that it feels like it's low on power, and this group of VO3x's like to downshift to 3rd but jump to the 4th too quickly, which results in low rpm again and makes the driver will keep push it back to 3rd again to rev it up, which means it keeps on changing between 3rd and 4th when it's supposed to cruise at 60kph. -
I'll say it can have exit door before the rear axle but no point if it's going to be too close to the entrance door. Might as well then have only 1 but wide door with railing seperation for simultaneous entrance & exit ?!?Originally posted by carbikebus:Thanks so thats mean it can't have exit doors before the rear axles right?(Like VO/LO 3X Where the exits are nearby)
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I presume you're referring to the old generation 6-cylinder OF 1417 used here from the 1980's, not the current 4-cylinder version OF 1417 ?
I'm not sure what is 'roaring' sound to you but i do recall they specified it here with exhaust brake, which together with the naturally aspirated engine was extremely noisy during braking @ speed. The O 306 used in Indonesia also emits a similar sound but slightly less noisy due to its smaller cc engine.
In fact right now in SGP, you can still find some Hino & Scania with exhaust brakes in-use. The sound during braking can also be quite noisy but less noisy compared to the OF 1417, which i attribute as due to the smaller cc of the Hino with it & charge-cooled engine in the case of Scania with it, like 1 unit used by SJE.Originally posted by cool_elf:I just don't get it... why does OF1417s made roaring engine sound when the bus slows down?? No other bus model had this roaring sound except OF1417s and that makes them unique and easy to be spotted. OF1413s did not have that roaring sound although manufactured by the same company OF1417s used automatic gearbox right? Any kind soul kindly enlighten me, thanx. Even up till now, the roaring sound still amuses me in my mind -
Thanks,BTW What are the current low steps(Not stepless) buses available now besides MAN 18.250/280?Originally posted by hseochin:I'll say it can have exit door before the rear axle but no point if it's going to be too close to the entrance door. Might as well then have only 1 but wide door with railing seperation for simultaneous entrance & exit ?!? -
Didn't know the OF1417 chassis is still in production.Originally posted by hseochin:I presume you're referring to the old generation 6-cylinder OF 1417 used here from the 1980's, not the current 4-cylinder version OF 1417 ?
Who still uses such buses? -
I can think of the M-B O 500 M (which i believe is used in CW3) with entry-level low-floor of 3-steps as on O 405 or O 305.
There's also a lower height O 500 U but not sure if that's low enough to be stepless.Originally posted by carbikebus:Thanks,BTW What are the current low steps(Not stepless) buses available now besides MAN 18.250/280? -
I believe HI uses it on some of their 'short' midibuses.
The OF 1417 of today much more effficient than the old version 20 years ago.
The engine size reduced by 50 % yet output unchanged with higher emission standards & far lower noise & vibration levels although of course not as smooth running as the in-line 6 cylinder old model !!Originally posted by iveco:Didn't know the OF1417 chassis is still in production. Who still uses such buses? -
Short midibuses aren't likely to have a GVW of 14 000 kg, as thats what the 14 stands for in 1417. The GVW for HI's Mercedes 'short' buses would probably be 11 000 kg with a 150hp engine so that would make it an OF1115, if there's such a thing.Originally posted by hseochin:I believe HI uses it on some of their 'short' midibuses.
The OF 1417 of today much more effficient than the old version 20 years ago.
The engine size reduced by 50 % yet output unchanged with higher emission standards & far lower noise & vibration levels although of course not as smooth running as the in-line 6 cylinder old model !!
Anyway, I don't know the exact GVW and power rating so I can't point out its correct model. -
Hi, can anyone share how buses are "born", that is, from selection of chassis, bodyworks to seats? Thanks.
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Hi guys , I was wondering ..
As you know , you have to turn on the iginiation to start the engine. I am aware of Scania buses , if you cant start the engine by iginiation , you can open the engine bonnet and there is a button for you to start the engine.
My question is , how about Volvo Mark II , III and IV ?
Thanks ! -
Hi all,
as we all noe, all buses need a key to turn on the ignition to start the bus. But how is the key assign to the BC? take from Depot everyday? A shift pass to P shift? or any other ways?
Thanks a million
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Yes for Scania and some 3x DDs suchs as Volvo OlympianOriginally posted by Airbus330Captain:Hi guys , I was wondering ..
As you know , you have to turn on the iginiation to start the engine. I am aware of Scania buses , if you cant start the engine by iginiation , you can open the engine bonnet and there is a button for you to start the engine.
My question is , how about Volvo Mark II , III and IV ?
Thanks ! -
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Each bus captain has their own personal key that is issued to them when they first start work. This key is a universal key, which can be used to start any bus in the company's fleet.
To turn on the engine, the driver must insert the key and then press a button to start it. If he removes the key with engine running (ie in the case of Sv. 36 where drivers do layover) the bus is immobilised. Gears cannot be changed, so bus cannot move.
To turn off engine, driver presses a button again. Removing the key prevents the bus from starting up since removing the key activates the immobiliser. -
thanks...so if any1 gets hold of the key, he can drive any bus in their fleet rite?Originally posted by SBS9818A:Each bus captain has their own personal key that is issued to them when they first start work. This key is a universal key, which can be used to start any bus in the company's fleet.
To turn on the engine, the driver must insert the key and then press a button to start it. If he removes the key with engine running (ie in the case of Sv. 36 where drivers do layover) the bus is immobilised. Gears cannot be changed, so bus cannot move.
To turn off engine, driver presses a button again. Removing the key prevents the bus from starting up since removing the key activates the immobiliser. -
Yup, that's what I was referring to.. those 80's OF1417s on SBS sv 171 and sv 24 back then. The 'roaring' sound that I meant was the low pitch loud engine sound when the bus slows down or braking. I'm sure some of the forummers here who grew up in the 80's are aware of that soundOriginally posted by hseochin:I presume you're referring to the old generation 6-cylinder OF 1417 used here from the 1980's, not the current 4-cylinder version OF 1417 ?
I'm not sure what is 'roaring' sound to you but i do recall they specified it here with exhaust brake, which together with the naturally aspirated engine was extremely noisy during braking @ speed. The O 306 used in Indonesia also emits a similar sound but slightly less noisy due to its smaller cc engine.
In fact right now in SGP, you can still find some Hino & Scania with exhaust brakes in-use. The sound during braking can also be quite noisy but less noisy compared to the OF 1417, which i attribute as due to the smaller cc of the Hino with it & charge-cooled engine in the case of Scania with it, like 1 unit used by SJE. Yup, you got the description right abt the sound.
Erm.. What are exhaust brakes? Not sure la
The Scania u mentioned is Scania CRB? Or CRL? As for Hino, is it SMRT Hino Volgren? I didn't notice the exhaust brake sound of the 2 buses.
Thanks Mr Hseochin -
Erm.. where is HI? Any pics of the newer version of OF1417? Interested to see it..Originally posted by hseochin:I believe HI uses it on some of their 'short' midibuses.
The OF 1417 of today much more effficient than the old version 20 years ago.
The engine size reduced by 50 % yet output unchanged with higher emission standards & far lower noise & vibration levels although of course not as smooth running as the in-line 6 cylinder old model !!
I thought OF1417 phased out already, hehe.. -
for DDs there is another button the BC has to press to deactivate the immobiliser. It is to prevent an outsider from using a stolen/found key to steal the bus.Originally posted by SBS9818A:Each bus captain has their own personal key that is issued to them when they first start work. This key is a universal key, which can be used to start any bus in the company's fleet.
To turn on the engine, the driver must insert the key and then press a button to start it. If he removes the key with engine running (ie in the case of Sv. 36 where drivers do layover) the bus is immobilised. Gears cannot be changed, so bus cannot move.
To turn off engine, driver presses a button again. Removing the key prevents the bus from starting up since removing the key activates the immobiliser.
Removing the key when the engine is off cuts off all electricity in the bus except the IDFC, which will automatically turn off after a while. -
Yep, that's the engine brake all right.Originally posted by cool_elf:The 'roaring' sound that I meant was the low pitch loud engine sound when the bus slows down or braking.