[Diy_efi] crankcase vacuum control
Brian Dessent
brian at dessent.net
Wed Apr 30 00:58:34 GMT 2003
md4etal wrote:
> > Inches in mercury, is not a unit I'm used to, I note some have commented
> > 10-15" of vacuum but where is that in relation to?
> >
> Atmosphere is 31.92" Hg absolute pressure or 0" relative. 10" of vacuum
> from the zero reference is 21.92" Hg absolute. Ill leave you to the
> engineering units/books to get it to bar.
Here's a chart I made a while ago with all the common pressure units.
All the values in a row (i.e., across) are equivalent, so 1"Hg = 13.595
inches water column = 3.386 kpa, etc.
inHg inH2O kPa bar psi atm
1.000 13.595 3.386 0.034 0.491 0.033
0.074 1.000 0.249 0.002 0.036 0.002
0.295 4.015 1.000 0.010 0.145 0.010
29.530 401.463 100.000 1.000 14.504 0.987
2.036 27.680 6.895 0.069 1.000 0.068
29.921 406.782 101.325 1.013 14.696 1.000
Brian
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