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Hit & Miss Gas Engine Discussion

Brayton Cycle Engines


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  #381  
Old 06-23-2016, 01:46:47 PM
imotorhead64
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Default Re: Brayton Cycle Engines

Continued improvements... new larger exhaust valve (to reduce pumping losses) also valve and ignition timing adjustments.


Last edited by imotorhead64; 06-23-2016 at 02:17:42 PM.
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  #382  
Old 07-02-2016, 03:49:59 AM
imotorhead64
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Default Re: Brayton Cycle Engines

I was reading through Clerks book "the gas, petrol and oil engine vol 2 1913 edition" and stumbled across him stating that in 1886 he went back and built another engine similar to his original compressor / expander 1878 (made from a Brayton) design. Here is a some of what Clerk had to say.








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  #383  
Old 07-02-2016, 04:00:25 AM
imotorhead64
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Default Re: Brayton Cycle Engines

Here Clerk talks about his second engine having one cylinder for compression and another for expansion... In the second engine he eliminated the reservoir to prevent explosion problems.

Here's a link to the book... it's chapter 2 titled the development of two-cycle gas engines page 184

https://books.google.com/books?id=aB...0Clerk&f=false







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  #384  
Old 07-05-2016, 07:23:16 PM
imotorhead64
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Default Re: Brayton Cycle Engines

In addition to the "Differential" and the "Cycle" engine Atkinson also made a third and often overlooked engine which is worthy of some study and recognition... Atkinson was able to make a more conventional engine yet preserved the efficiency of having a short compression stroke and a long expansion stroke in a rather ingenious way. It sounds much like a standard 2 stroke except that the exhaust port is located at about the middle of the stroke. The exhaust is prevented from escaping by a timed valve which remains closed until the piston reaches the end of the stroke. Once the valve is opened it remains open as the piston heads toward compression letting air and exhaust escape until the port is covered. a rich fuel /air mixture is injected by a small piston pump at the start of compression. This results in a shorter compression and longer expansion stroke. The Atkinson "Utilite'" engine is described By Clerk as follows:








Last edited by imotorhead64; 07-05-2016 at 11:12:32 PM.
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  #385  
Old 07-05-2016, 07:27:00 PM
imotorhead64
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Default Re: Brayton Cycle Engines







I found this in "the Practical Engineer" from 1893 patent # for the Utilite' engine is # 2492 ( British) I've not been able to locate much information or pictures of this engine... maybe someone knows how to access the British patent system? it would be neat to see a drawing of it.

https://books.google.com/books?id=Dl...kinson&f=false

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Last edited by imotorhead64; 07-05-2016 at 10:12:14 PM.
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  #386  
Old 07-05-2016, 10:17:44 PM
imotorhead64
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Default Re: Brayton Cycle Engines

After quite a lot of searching I finally found a drawing of Atkinson's Utilite' engine.





https://books.google.com/books?id=H0...kinson&f=false

Last edited by imotorhead64; 07-05-2016 at 10:37:57 PM.
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