schlimm What's a typical price for the new GE vs the EMD models?
What's a typical price for the new GE vs the EMD models?
C&NW, CA&E, MILW, CGW and IC fan
M636C Some notes from the EMD Power Products Brochure currently on their website. "Fuel Injectors - Electronic Unit Injectors - needle valve" "Since EMD is the only medium speed two cycle diesel engine manufacturer in the world, we are the experts. The fact is that the EMD 710 family has been Tier 2 certified since January 2005. EMD received our EPA Tier 2 certification in May 2006. So how did we do it? Common rail fuel injection, adding another turbocharger, new electronic controls? No none of these were required,,," M636C
Some notes from the EMD Power Products Brochure currently on their website.
"Fuel Injectors - Electronic Unit Injectors - needle valve"
"Since EMD is the only medium speed two cycle diesel engine manufacturer in the world, we are the experts. The fact is that the EMD 710 family has been Tier 2 certified since January 2005. EMD received our EPA Tier 2 certification in May 2006. So how did we do it? Common rail fuel injection, adding another turbocharger, new electronic controls? No none of these were required,,,"
M636C
Does anyone know which engine is more reliable, the SD70ACe or the GEVO? I'd be curious to see which one on average costs more to service and/or repair.
All of that fancy mumbo-jumbo and they still take forever to load up. Just another bean counter loco.
.
carnej1 ... the fact that the GEVOS have four fewer cyinders than an EMD 16-710 is def. a factor. That is a major difference...
... the fact that the GEVOS have four fewer cyinders than an EMD 16-710 is def. a factor. That is a major difference...
...that is almost meaningless in terms of BSFB (engine fuel efficiency).
It's the engine's BMEP (compression ratio + boost, sort of) that's important!
-Don (Random stuff, mostly about trains - what else? http://blerfblog.blogspot.com/)
edbenton I know GE uses a Individual metered Injecter for each Cylinder. Emd still uses a Common rail setup with a Mechaincal linkage to the Governoer. GE has had Electroncis controling the Fuel Injectioon since the Dash-9's. When each piston gets the perfect amount of fuel not any extra makes a differance. Also there are a few other things on the EVO,s that are way out there when the computer looks at the demands from the Engineer and then the power needed from the Prime mover to decide if it needs to increase the fuel flow that is why GE loads slower put while it is doing that it is pouring the amps if possible to the TM's
I know GE uses a Individual metered Injecter for each Cylinder. Emd still uses a Common rail setup with a Mechaincal linkage to the Governoer. GE has had Electroncis controling the Fuel Injectioon since the Dash-9's. When each piston gets the perfect amount of fuel not any extra makes a differance. Also there are a few other things on the EVO,s that are way out there when the computer looks at the demands from the Engineer and then the power needed from the Prime mover to decide if it needs to increase the fuel flow that is why GE loads slower put while it is doing that it is pouring the amps if possible to the TM's
What are those differences? Is the 6 individual inverters vs 2 on EMD?. Or is other items and how would all these items is be a factor in electric motors?
3 things are different and make the Differance in the GE over the EMD prime Movers. One is the Turbocharger arrangnement. A clutch driven turbo/supercharger is a FUEL HOG til the motor is spinning fast enough to overrunnig the clutch. Second is the Air to Air Intercooler When you cool the charge of air that is feeding the cylinders you get a more complete burn and better more efficent motors also. Lastly a 4 stroke is plain and simple more efficant over a 2 storke design. The Piston is still going down when it uncovers the intake ports and the exhaust valves open dumping out any cahnce the 710 had to catch the EVO series at all.
Keep in mind that the EMD has twice as many firing events as the GEVO does due to it being a two stroke engine ... but as it is, that's still pretty good. The GEVO engine has a higher top speed in RPM.
carnej1 BaltACD trainfan1221 I'm sure GE is enjoying it. I would maybe guess the fuel economy has to do with the 12 cylinder engine. Without knowing any specifics of either design, I am certain that the different consumption rates are the result of myriad of very subtle design and engineering differences between the prime movers, as well as the accessories that are necessary for line of road operation. From the outside looking in, we would like to ascribe the differences to one or two specific things....the reality always goes to dozens if not hundreds of little things, that when all added together result in a much bigger difference. ... the fact that the GEVOS have four fewer cyinders than an EMD 16-710 is def. a factor. That is a major difference...
BaltACD trainfan1221 I'm sure GE is enjoying it. I would maybe guess the fuel economy has to do with the 12 cylinder engine. Without knowing any specifics of either design, I am certain that the different consumption rates are the result of myriad of very subtle design and engineering differences between the prime movers, as well as the accessories that are necessary for line of road operation. From the outside looking in, we would like to ascribe the differences to one or two specific things....the reality always goes to dozens if not hundreds of little things, that when all added together result in a much bigger difference.
trainfan1221 I'm sure GE is enjoying it. I would maybe guess the fuel economy has to do with the 12 cylinder engine.
I'm sure GE is enjoying it. I would maybe guess the fuel economy has to do with the 12 cylinder engine.
From the outside looking in, we would like to ascribe the differences to one or two specific things....the reality always goes to dozens if not hundreds of little things, that when all added together result in a much bigger difference.
EVO 9.84 in. bore x 12.59 in. stroke x 12 cyl = 11397.87 cu.in.
710 9.02 in. bore x 11 in. stroke x 16 cyl = 11246.45 cu.in
in theory, more cubic inches should consume more fuel.
Never too old to have a happy childhood!
"I Often Dream of Trains"-From the Album of the Same Name by Robyn Hitchcock
I thought this might be of interest to some of you:
http://finance.yahoo.com/news/GEs-Evolution-Series-bw-15551743.html?.v=2
Ed
Our community is FREE to join. To participate you must either login or register for an account.