SPECIALLY COLLECTED PAPERS
Shimadzu Review 74[3・4] (2017.12)
Abstract
While current global trends for electrification of automobiles have advanced rapidly in the past several years, it is expected that internal combustion engines (engines) will be used for at least the next several decades. In addition to power output performance, demand for fuel efficiency and environmental performance continue to grow as people become more environmentally aware and more automobiles are used in emerging countries. Engine control technology has become more advanced and complex to respond to these demands. The technology to accurately measure in-cylinder conditions is indispensable for automobile manufacturers that have been efficiently developing powertrain control, using model-based development.
We have developed a high-speed response in-cylinder monitoring technology which adopts the wavelength tunable diode laser absorption spectroscopy method because of its excellent response characteristics and compact sensor probe that can withstand the harsh in-cylinder environment. These features enable the measurement of in-cylinder gas temperatures and concentrations of carbon dioxide (CO2) and hydrogen oxide (H2O) with a high time resolution of 50 µs. This tech-nology is expected to contribute to greater improvements in engine performance by using in-cylinder condition information for model-base development.
Keywords: TDLAS, Model-based development, Internal combustion engine, EGR, Carbon dioxide, Automotive engine
1Sensor Device Business Unit, Device Department, Shimadzu Corporation, Kyoto, Japan
2Human Resource Development Department, Human Resource Department, Shimadzu Corporation, Kyoto, Japan
3Optical Technology Unit, Technology Research Laboratory, Shimadzu Corporation, Kyoto, Japan
4Research Promotion Department, Technology Research Laboratory, Shimadzu Corporation, Kyoto, Japan
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