[SEL] Fuel Intake Compensating Valve Theory/Question

[John Hammink]

The purpose of the compensating air valve is to insure the correct
percentage of fuel in the mixture, regardless of whether the engine
is running fast or slow, under full load or idle. The suction of fuel
varies with the speed of the piston and the opening in the air intake
pipe. The compensating valve compensates for such conditions.
I think he found it experimentally after some different designs and
constructions.

John Hammink
Anna Paulowna, Netherlands.
jg.hammink at quicknet.nl
www.oldengine.org/members/hammink/web



> What is the theory in the use of this compensating valve?  It  seems that 
> this device acts as a partial choke to increase fuel flow into the  mixer.  The 
> other thing that I wonder about is how the original engine  designer/builder 
> discovered that this device was needed.  Does anyone  have any thoughts on this 
> subject?  
> 
> Francis Maciel
> Santa Maria, CA