A Method of Estimating Gasoline Engine Performance

960011

02/01/1996

Event
International Congress & Exposition
Authors Abstract
Content
When the power or specific fuel consumption is estimated in design process, thermodynamic consideration for the estimation is generally insufficient. Hence, a theory that can estimate these performances accurately is investigated in this paper.
As a result of investigation, it is clear that the effect of pumping loss in wide-opene throttle valve operation has to be excluded from the mechanical loss which is measured in the motoring test. It also becomes clear that a new coefficient called pumping loss coefficient ηP has to be considered for the negative work for pumping.
From the foregoing, theoretical formulas for estimating the net power Pe and net specific fuel consumption be. which are formed with various efficiencies and coefficients are as follows:
No Caption Available
It is verified that the estimation from these formulas agree well with the experimental test values using stoichiometric mixture ratio. By using these formulas, the mechanism for improvement of specific fuel consumption in the lean burn engine is also examined by analyzing the effect of air/fuel ratio on Pe and be.
Meta TagsDetails
DOI
https://doi.org/10.4271/960011
Pages
12
Citation
Gomi, T., Suzuki, T., and Yoshida, M., "A Method of Estimating Gasoline Engine Performance," SAE Technical Paper 960011, 1996, https://doi.org/10.4271/960011.
Additional Details
Publisher
Published
Feb 1, 1996
Product Code
960011
Content Type
Technical Paper
Language
English