A Major Origin of Cyclic Energy Conversion Variations in SI Engines: Cycle-by-Cycle Variations of the Equivalence Ratio and Residual Gas of the Initial Charge Laser-Laboratorium Göttingen

Format:

Conference/Event

Author/Creator:

Grünefeld, G., author.

Conference Name:

International Fuels and Lubricants Meeting and Exposition (1994-10-17 : Baltimore, Maryland, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1994

Summary:

It is demonstrated that the cycle-by-cycle variations in the IMEP of a realistic automobile engine with port fuel injection are dominated by the cyclic fluctuations of the equivalence ratio and residual gas content of the initial charge at least for certain operating conditions. A new spontaneous Raman scattering technique yields simultaneously the densities of fuel, O2, N2, and H2O prior to ignition. In-cylinder equivalence ratio and residual gas content are determined quantitatively with high precision by ratios of densities. Prior-cycle effects are observed and explained by the properties of the initial charge. The results show that cyclic variability can be explained and may he consequently reduced by the help of the new measurement system

Notes:

Vendor supplied data

Publisher Number:

941880

Access Restriction:

Restricted for use by site license