WAVELENGTH-MULTIPLEXED ABSORPTION SPECTROSCOPY APPLIED TO AN HCCI ENGINE
Abstract
A new optical technique to measure real time in-cylinder temperature was developed
using fiber Bragg gratings. For this aim, a time multiplexing and a frequency
multiplexing sensor system were designed and developed. This paper focuses primarily
on the time multiplexing sensor system design and development. The time multiplexing
sensor system was developed and experiments were performed on an HCCI engine
located in Honda R&D in Japan using a 19-in-1 fiber Bragg grating array. These data
represent the first successful measurements of real time in-cylinder temperatures by our
group. The frequency multiplexing sensor system was developed in order to improve the
measurement.