SPARK-PLUG LDV, LIF, AND LII PROBE FOR ENGINE FLOW AND COMBUSTION ANALYSIS

摘要

A traversable, fiber-optic probe design for flow-related measurements in a production- car IC engine during normal operating conditions may be fitted into an M8 spark-plug hole and traversed as much as 50 mm in an axial direction of the spark plug, allowing measurements inside the engine cylinder including the spark plug location. Components of the laser-based system include on-table optics used to generate laser beams and a data acquisition and reduction system used to extract the information measured from the signal produced by the fiber-optic probe.