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camshaft layout

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BERTO10/12/2011 06:26:03
46 forum posts
Hi i was flicking through some of my books on I/C Engines and was reading up on camshafts .
These books seem to be mostly interested in describing how to make a camshaft by glueing the the lobes on or describing opening and closing of the valves and how many degrees of crank rotation they are open for etc.
Whilst this is all usefull info i am thinking about building a cam grinder that would use a template and a follower to to move the grinding wheel so it grinds the profile of the cam to what is set up on the template .
This is similar to the cam grinder featured in MEW a few years back but i would like to know if anyone knows of a book , website etc that shows how to draw these shapes ?
I am not worried about roller cams as they are two radii separated by flat flanks , what i'm after is cam lobes for flat based lifters which need a radius on the flanks .
What about asymetrical cams they have opening or closing ramps so how does one go about designing and laying out these ?
There are also things like what radius to use for the various sections of a cam lobe ?
Valvetrain velocity is another area that i would like to know about also.
 
 
Ian

 
John Stevenson10/12/2011 10:23:03
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5068 forum posts
3 photos
Take a read of this.
 
http://modelenginenews.org/design/CamTable.html
 
And the associated links on the page.
 
John S.

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