[sedqp5]

Hello,

I am a mechanical engineering student at Mizzou and recently we have be studying cam design. Of course this led me to look into the internal combustion engine where I ran into a question.

I've noticed that it seems that people are moving away from pushrod cam systems to overhead cams but I'm not exactly sure why. I guess that I understand that by removing the push rods it frees up some logistical space in the lower portion of the motor but is there any advantages other than this?(i.e. advantages in available cam design such as to minimize acceleration or jerk?)

I was also wondering if there are any engine manufacturers who are utilizing form-closed cams rather than the standard seeing that this would eliminate the need for valve springs.

BTW, this information isn't for a project or anything, just curiosity, It's nice to see how this information is getting applied from time to time.

Thanks in advance