Mjn at 03:06, 30 May 2011

2011-05-30T03:06:25Z

← Older revision		Revision as of 03:06, 30 May 2011
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	{{Category=Steam Engine}}		{{Category=Steam Engine}}
			[[Steam Engine Research]]

	From "Steam Engineering: A Text Book" by William R. King.		From "Steam Engineering: A Text Book" by William R. King.

Mjn: Created page with "{{Category=Steam Engine}} From "Steam Engineering: A Text Book" by William R. King. =Valve Design= A defective design can cost as much as 20% loss in fuel consumption. It can..."

2011-05-28T12:48:09Z

Created page with "{{Category=Steam Engine}} From "Steam Engineering: A Text Book" by William R. King. =Valve Design= A defective design can cost as much as 20% loss in fuel consumption. It can..."

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{{Category=Steam Engine}}

From "Steam Engineering: A Text Book" by William R. King.

=Valve Design=

A defective design can cost as much as 20% loss in fuel consumption.

It can also cause uneven motion resulting in wear on the working parts that can make the engine unsafe.

The book focuses on a slide valve design staring with design of the eccentric to control it's operation. Can the following diagram be adapted to work with a bump valve design somehow?

[[Image:valve-eccentric-diagram.png]]

The bump valve somewhat like half of a slide valve, but instead of being controlled by a separate eccentric, it is controlled by the piston head itself. Admission and cut-off are determined by the length of the valve pin. Exhaust port opening is determined by the cylinder reaching a certain point near the bottom dead center of the stroke.

The Zeuner Valve Diagram can give the following information:

* Admission at F
* Cut-off at C
* Release at Q
* Compression at Q'
* Steam lap, OL
* Exhaust lap, OL'
* Travel of valve, EE'
* Maximum opening of port to steam, RE
* Maximum opening of port to exhaust, R'E''
* Angular advance of the eccentric, angle DOE

[[Category:Steam Engine]]

Steam Engine Research/Valve Design Notes - Revision history

Mjn at 03:06, 30 May 2011

Mjn: Created page with "{{Category=Steam Engine}} From "Steam Engineering: A Text Book" by William R. King. =Valve Design= A defective design can cost as much as 20% loss in fuel consumption. It can..."