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We present a planar laser-induced fluorescence (PLIF) study of the effect of fuel volatility on the unburned hydrocarbons (UHC) outgassing from a simulated crevice in a single cylinder 1992 GM quad-4 engine. The crevice consists of a small volume in the cylinder wall which is connected to the cylinder by a small orifice. The crevice volume and orifice are intended to simulate the piston ring-pack region and the top ring gap. A fuel that consists of 90% by volume iso-octane and 10% of a ketone is used in these experiments. The ketone serves both to represent a particular fuel distillation fraction and as the fluorescent marker. A range of ketones are used to represent fuel distillation fractions between 56°C and 173°C. For each fuel, in-cylinder single-shot and multi-cycle averaged two-dimensional fluorescence images are obtained from a region near the simulated crevice.

RESULTS OF AN EXPERIMENTAL STUDY on the implementation of adaptive hydraulic mounts are presented. The objective of the study is to evaluate the effectiveness of adaptive hydraulic mounts in reducing frame vibrations to increase passenger comfort. The experimental study is conducted on a rear-wheel drive truck equipped with an in-line four cylinder engine. Details of experimental equipment, hardware implementation, and control design are reviewed. Experimental results are presented and discussed.