LASER IGNITION SYSTEM BASED DIAGNOSTICS

摘要

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.

主权项

1. A method for a hybrid vehicle engine, comprising:
during selected non-combusting engine conditions in which the vehicle has been placed into a service mode, rotating the engine via an electric motor responsive to an operator input.