CAM PROFILE AND DESIGN FOR PISTON RINGS
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Re: CAM PROFILE AND DESIGN FOR PISTON RINGS
Re: CAM PROFILE AND DESIGN FOR PISTON RINGS -- lakna_3581	Post Reply	Top of thread	Forum

Posted by: spgautam ® 06/26/2005, 13:45:10 Author Profile Mail author Edit

friend some problem in your question . camprofile incylinders are needed to operate inlet and exuast valves . in what reference you are asking for piston rings ? please clarify a bit more

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Re: CAM PROFILE AND DESIGN FOR PISTON RINGS
Re: Re: CAM PROFILE AND DESIGN FOR PISTON RINGS -- spgautam	Post Reply	Top of thread	Forum

Posted by: randykimball ® 06/26/2005, 22:37:17 Author Profile Mail author Edit

Pistons are no longer round they are elliptical shaped to provide a round shape when up to operating temp. This allows the direction with the rod boss to match the other 90° direction at run time. The skirt has other thermodynamic properties to effect it before and at operating temperature. FYI.. this why it is no longer correct to warm up you auto engine slowly, get in it and drive and get past the warm up as quickly as possible... this gets past the "doesn't fit" time where the most damage happens in piston/ring/cylinder wall fit tolerances sooner. Now for the rings... thinking out loud... and also wanting to know why and if they are cam shaped..... I'd guess the following... if I may....and it IS a guess..for conversation & discussion. The rings too are effected by the fact that there is one area that is not a circle, the gap. The ring too needs to be round and produce equal closure all the way around the cylinder wall when at operating temperature (except at the gap). Plus the piston and ring are not the same temperature all the way around.. this effects shape changes. However, I thought piston rings were still being manufactured round.... in spite of these facts. Someone please step up and give a definitive answer. -randy- The worst suggestion of your lifetime may be the catalyst to the grandest idea of the century, never let suggestions go unsaid nor fail to listen to them.

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