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Re: engine talk (archive)

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Posted by Jon on November 13, 2000 at 14:56:17:

In Reply to: engine talk posted by joe on November 13, 2000 at 14:38:09:

Here is an approximate explanation for you.


Pushrod engines actuate the valves like this:
cam -> lifter -> pushrod -> rocker -> valve

Overhead cam engines do it like this:
cam -> lifter -> valve (basically)


Pushrod setup:
_________ ___
/_________O____\ <- rocker
|| ||
|| <-valve ||
|| ||
/__\ || <- pushrod
||
||
||
||
||
| |
| | <-lifter
|__|
/ \
/ __ \
| (__) | <-cam
\____/

Then, for an overhead cam, imagine putting the cam up on top of the valve. Then you don't need the pushrod.

-Jon


what does "pushrod" refer to? what do engines that do not use this use instead?

thanks
joe





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