Laser ignition system based diagnostics
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United States of America Patent
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Dec 15, 2015
Grant Date -
Oct 23, 2014
app pub date -
Apr 17, 2013
filing date -
Apr 17, 2013
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Abstract
Methods and systems are provided for enabling engine diagnostics, including visual inspections of an engine cylinder, using existing hardware from a laser ignition system. Light pulses from a laser ignition device are received at a photodetector during non-combusting conditions and used to generate images of an inside of the cylinder that can be assessed by a service technician. An electric motor of the vehicle system can be used during a service mode of the vehicle to rotate the engine to, and hold the engine at, specified engine positions that enable the technician to perform selected diagnostic tests.
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