Method to diagnose a failure of an OPCJ valve of an internal combustion engine

摘要

A method is provided to diagnose a failure of an OPCJ valve of an internal combustion engine. The OPCJ valve is located in an auxiliary line connecting an engine lubrication line to at least an oil jet for squirting lubricating oil from the engine lubrication line towards a piston surface. The method provides for monitoring the pressure variation in the engine lubrication line due to a switching signal sent to the OPCJ valve.

主权项

1. A method to diagnose a failure of an OPCJ valve of an internal combustion engine, the OPCJ valve located in an auxiliary line connecting an engine lubrication line to an oil jet for squirting lubricating oil from the engine lubrication line towards a piston surface, and the method comprises:
receiving a switching signal sent to the OPCJ valve; and monitoring a pressure variation in the engine lubrication line due to the switching signal sent to the OPCJ valve, wherein monitoring the pressure variation includes monitoring the pressure variation at a portion of the engine lubrication line that is in constant fluid communication with a pump.