volumetric efficiency

Mattias Nyberg matny at isy.liu.se
Mon Mar 11 16:58:16 GMT 1996


> 
> "We concluded this when we got an volumetric efficiency of 1.1 !"
> 
> What makes you think having a volumetric efficiency of 1.1 makes your 
> meter incorrect? It is entirely possible to get volumetric efficiencies
> greater than one. What engine? What rpm? What was it designed to do?

The engine is a SAAB 2.3L standard production engine (fuel injection, 
no turbo, no EGR). The volumetric efficiencies close to 1.1 was obtained 
around 4000 rpm. Normally the vol. eff. should be 0.85 (see any engine
book) which makes an error of (1.1-.85)/.85=29%.

How can vol. eff. be greater than 1?

Mattias Nyberg



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