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High speed in-cylinder laser hygrometry for EGR quantification using a wavelength scanned vertical cavity surface emitting laser

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Abstract

The TDLAS based hygrometer was used for measurements of absolute water vapor concentrations in motored IC engines with time resolutions from 500µs up to 100µs. Measured concentrations indicate a detection limit of 0.06 vol%.

© 2012 Optical Society of America

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