Quote:
Originally Posted by stevej37
repost: selectable squish
snip... nline-four demonstrator can adjust its compression ratio from 8.8:1 to 12.0:1 in 0.2 to 0.6 second. |
Quote:
Originally Posted by stevej37
Probably right! I wish the article would have gone further and explained what controls the miniature pistons that rotate the cam. Oil pressure? Electronic?
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Oil pressure. Note the long slot in the main.
edit: internal passages must feed (selective) pressure up from the main bearing.
I can see how this could hold pressure (like a hydraulic valve) but I'm not seeing the control side.