Ride On CNG's

[Tristan]

Not sure what mechanism a CNG fuel system uses to get fuel from the tank to the engine...do you need fuel pumps and whatnot?  Any defect in that system could cause the same problem, not just low fuel volume.

I know at DASH we top off every fuel tank every night, but would that necessarily be the case at a larger TA?

[WayneNYC]

I'm assuming b/c of the different runs the buses have they get fueled at  different time? b/c in the summer I would always get 5907 on the 59 at the same time at 9:32 in the morning and it would do the same exact thing. At first I thought it was just isolated to the voiths. But I've been on a couple of the 5900's ZF's and the NF's and they done it also...

At NYCTA most of the buses get refueled when they're pulling in during the evening.  The bus operator into the depot.  From there the "drillers" take over and the bus will get it's farebox probed while being refueled and fluids checked, then it's through the wash and parked.  The buses that operate overnight (we call them hawks) generally pull-in toward the end of the AM rush hour and they'll get refueled and either go back out or get parked assuming there's no issues that would put it on the "bad order" line. 

[aznboy4305]

If I recall correctly, I always thought CNG buses have multiple (at least 6 or 8 ) individual tanks under that hump. I honestly don't think the cause of the issue is something as simple and obvious as CNG pressure dropping throughout the day.

[Tristan]

You're right that they do.  I don't profess to be an engine mechanic, I'm just stitching together things I've observed, things I've been told, and things I've learned to come up with a theory.  Maybe it's not correct, but why would it be incorrect simply on the basis that it is "simple and obvious"?

[ir0cq09]

Speaking of The CNG.......So i recorded this aboard 5914 on the 74 to Germantown, At red lights and stops this bus revved like crazy, does anyone know why it does that... i also know 5804 and 5905 does this.. i ride  5905 everyday home from work on the 76. Does anyone know what causes this? I actually like it though...This big had lots of personality.(sorry for the crappy recording)

Ha...sorry to bring up a old topic but i finally found a vid of what i was talking about a good vid. its lacmta 7311 sounds so cool   http://www.youtube.com/watch?v=HmLRjN2zjHc

[RideOn5905]

I've seen multiple buses in the past that have done this. The most recent was 5832 at GTC this morning on the 55. What I'd like to know is: Do WMATA's buses do this as well, or is it just Ride-On?

[ir0cq09]

I've seen multiple buses in the past that have done this. The most recent was 5832 at GTC this morning on the 55. What I'd like to know is: Do WMATA's buses do this as well, or is it just Ride-On?

i know some of the 2800's do. i was on the 79 last week and a wheelchair passenger got on. when the bus driver opened the ramp the engine started revving like that. it was so awesome. to bad the C-Gas+ is not being made anymore. The ISL-G sounds so bland.

[Tristan]

I've heard this sound from any combination of CNG powertrain, and I think I've experienced most (if not all) of them.  It's not restricted to a particular manufacturer or agency, it's just one of the properties of a natural gas engine.

[ir0cq09]

Saw this on BusChat-------> So it looks like Gillig is getting into the CNG business http://www.ngvglobal.com/emi-natural-gas-fuel-systems-for-gillig-buses-0327

Does anyone think that Ride On will probably get CNG Gillig's once they make there debut?? i was hoping for more Orion's or New Flyer's Ride On.

[NewFlyer9736BCT]

Saw this on BusChat-------> So it looks like Gillig is getting into the CNG business http://www.ngvglobal.com/emi-natural-gas-fuel-systems-for-gillig-buses-0327

Does anyone think that Ride On will probably get CNG Gillig's once they make there debut?? i was hoping for more Orion's or New Flyer's Ride On.

considering the fact on how Silver Spring has ordered tons of Gilligs recently, I wouldn't be surprised to see some of their CNGs ordered for Gaithersburg. if not, then I hope they go with New Flyer, i'm tired of seeing Orion VIIs all over the place

[RideOn5905]

CNG Gilligs? Okay, THAT is something I'd like to see Ride-On get. Plus, I don't think their next CNG batch is gonna be Orion VII NGs, since I remember reading an earlier post here that said that RO wasn't too happy with their current O.VIIs. Come to think of it, that post also said something about NABIs not being out of the question. I have to admit, it would be a nice change of pace. Plus, seeing so many VIIs does get a bit tiring after a while. Except for the '03 models; I'll NEVER get tired of those.
It just occurred to me... would this new CNG approach also apply to the 30-footers? Because it'd be pretty cool to see some of those buzzing around Germantown as well; like, doing the 97 and 98. Plus, if they do, this could mean the end for the Helldorados (I've actually never ridden one of those before).

[Tritransit Area]

Wow.  I must say that seeing so many Gillig Low Floors around gets tiring after a while too....

I wouldn't be surprised if they get more New Flyers or Gilligs, though...sigh...