Quote:
Originally Posted by Brian Carlton
As FI mentioned above, when we refer to compression ratio, we're talking about static compression ratio. Simply take the volume of the cylinder with the piston at BDC and compare it to the volume of the cylinder at TDC. That's your ratio.
If you then manage a higher effective ratio via the use of additional boost pressure, that's another condition altogether and it's got nothing to do with the static compression ratio.
Even 25:1 is significant for a diesel when looking at static compression ratio. Clearance for the valves becomes a significant problem. Were these DI engines?
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Yes. A piece of thin paper would be the only thing you could fit inside the cylinder for instance.
At first, we wanted to be behind an explosion barrier when at first start!
02-03-2007, 01:51 PM
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