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 Post subject: Re: History of the EMD 567 Diesel Engine
PostPosted: Sun May 26, 2013 9:36 am 
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 Post subject: Re: History of the EMD 567 Diesel Engine
PostPosted: Mon May 27, 2013 6:50 pm 
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 Post subject: Re: History of the EMD 567 Diesel Engine
PostPosted: Wed May 29, 2013 6:55 pm 
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 Post subject: Re: History of the EMD 567 Diesel Engine
PostPosted: Thu May 30, 2013 9:51 pm 
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 Post subject: Re: History of the EMD 567 Diesel Engine
PostPosted: Fri May 31, 2013 1:12 am 

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Seems like there would be advantage to using valves for intake and the cylinder ports for exhaust. I suppose the plumbing to work that way would be undesirable since they'd probably not want the entire space around the power assemblies, now filled with air, to be filled with hot exhaust so that would mean a manifold of some sort down there.

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 Post subject: Re: History of the EMD 567 Diesel Engine
PostPosted: Fri May 31, 2013 10:27 pm 
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filmteknik wrote:
Seems like there would be advantage to using valves for intake and the cylinder ports for exhaust.
The major problem I see in that arrangement is intake/exhaust area ratio.

I am familiar with car engines and I've always seen greater intake area than exhaust area. For example, the Chevrolet 202 heads run 2.02 intake and 1.60 exhaust valves. The surface area is proportional to the square of the diameter (area of circle is πr²) therefore the area ratio is 2.02²=4.08 and 1.60²=2.56. The exhaust area is about 63% of the intake area and to get that ratio in the small confines of the 567 head would be to severely limit the intake flow with the intake valves in the head. Much larger intake area is available as ports around the cylinder liner.

I suspect the reason for the 37% difference is the intake pressure and exhaust pressure are vastly different. Intake pressure (normally aspirated) is atmospheric (14.7 lb/in²) compared to exhaust pressure which can be much greater as the piston forces the gas out.

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Exhaust Pressure (PE) is higher than intake pressure (PI) thus Intake valves need to be larger to fill the same volume as the exhaust valve to empty the same volume in the same time (180 degrees crank rotation).

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Last edited by machinehead61 on Sat Jun 01, 2013 12:02 am, edited 3 times in total.

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 Post subject: Re: History of the EMD 567 Diesel Engine
PostPosted: Fri May 31, 2013 11:49 pm 

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Note the the FM OP uses ports for both. I do not know if the port areas are the same or not.

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 Post subject: Re: History of the EMD 567 Diesel Engine
PostPosted: Sat Jun 01, 2013 12:08 am 
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filmteknik wrote:
Note the the FM OP uses ports for both. I do not know if the port areas are the same or not.

I'm not familiar with the Fairbanks Morse opposed piston engine. I suspect that intake port area would be larger than exhaust. Forced induction (supercharging) could reduce the needed intake area.

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 Post subject: Re: History of the EMD 567 Diesel Engine
PostPosted: Mon Jun 03, 2013 12:48 am 
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 Post subject: Re: History of the EMD 567 Diesel Engine
PostPosted: Mon Jun 10, 2013 12:03 am 
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 Post subject: Re: History of the EMD 567 Diesel Engine
PostPosted: Mon Jun 10, 2013 9:53 pm 
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 Post subject: Re: History of the EMD 567 Diesel Engine
PostPosted: Tue Jun 11, 2013 7:09 pm 
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 Post subject: Re: History of the EMD 567 Diesel Engine
PostPosted: Tue Jun 11, 2013 7:49 pm 

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Anyone contemplating spending a large amount of their supporters donations to reverse engineer or duplicate a product the principal designer considered to be less than satisfactory should read page 55 of this superb technical paper very carefully.

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 Post subject: Re: History of the EMD 567 Diesel Engine
PostPosted: Tue Jun 11, 2013 10:37 pm 
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I've really enjoyed reading this because I now appreciate just how much trial and error, perseverance and genius went into making this great engine as reliable as they did.

Unsung heros are the engineers, machinists, molders, welders and other craftsmen that contributed to the success of this engine.

I feel far too often that these behind the scenes people are never appreciated for what history they made because so much of what they had to over come never was told.

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 Post subject: Re: History of the EMD 567 Diesel Engine
PostPosted: Tue Jun 11, 2013 11:16 pm 

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Thank you for taking the time to scan and post this. I am really looking forward to reading it.

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