LASER IGNITION SYSTEM BASED DIAGNOSTICS

摘要

Methods and systems are provided for using an engine laser ignition system to perform a visual inspection of an engine and diagnose various cylinder components and conditions based on engine positional measurements. Laser pulses may be emitted at a lower power level during an intake and/or exhaust stroke to illuminate a cylinder interior while a photodetector captures images of the cylinder interior. Additionally, laser pulses may be emitted at a higher power level to initiate cylinder combustion while the photodetector captures images of the cylinder interior using the light generated during cylinder combustion.

主权项

1. A method for an engine, comprising:
over an engine cycle, operating a laser ignition device in each engine cylinder; identifying a piston position in each cylinder based on the operating; and indicating degradation of a crankshaft based on a piston position of each cylinder.