System and method for measuring valve lift and for detecting a fault in a valve actuator based on the valve lift

摘要

A system according to the principles of the present disclosure includes a valve lift determination module and a fault detection module. The valve lift determination module determines valve lift based on at least one of a first period when a valve is open and N differences between a first value of a valve lift signal generated by a valve lift sensor when the valve is closed and a second value of the valve lift signal when the valve is open, wherein N is an integer greater than one. The fault detection module detects a fault in a valve actuator based on the valve lift.

主权项

1. A system comprising:
a valve lift determination module that:
obtains samples of a valve lift signal generated by a valve lift sensor;determines whether a valve is open or closed based on a magnitude of the samples;determines a first period for which the valve is open based on a number of the samples obtained while the valve is open and a corresponding sampling rate; anddetermines valve lift based on the first period, wherein the valve lift is an amount by which the valve is lifted; and a fault detection module that detects a fault in a valve actuator based on the valve lift.