System and method for measuring valve lift and for detecting a fault in a valve actuator based on the valve lift
AssigneeGM Global Technology Operations LLC
InventorsRonald J. Kubani, Scott T. Feldmann, Donovan L. Dibble
Life of this patent
Estimating the term…
Abstract
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.
Claims28
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;
- and
- determines 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.
A method comprising:
- obtaining samples of a valve lift signal generated by a valve lift sensor;
- determining whether a valve is open or closed based on a magnitude of the samples;
- determining 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;
- determining valve lift based on the first period, wherein the valve lift is an amount by which the valve is lifted;
- and
- detecting a fault in a valve actuator based on the valve lift.
A system comprising:
- a valve lift determination module that:
- obtains L samples of a valve lift signal when a valve is closed;
- obtains M samples of the valve lift signal when the valve is open;
- and
- determines valve lift based on N differences between the L samples of the valve lift signal and the M samples of the valve lift signal, wherein the valve lift is an amount by which the valve is lifted, and L, M, and N are integers greater than one;
- and
- a fault detection module that detects a fault in a valve actuator based on the valve lift.
A method comprising:
- obtaining L samples of a valve lift signal when a valve is closed;
- obtaining M samples of the valve lift signal when the valve is open;
- determining valve lift based on N differences between the L samples of the valve lift signal and the M samples of the valve lift signal, wherein the valve lift is an amount by which the valve is lifted, and L, M, and N are integers greater than one;
- and
- a fault detection module that detects a fault in a valve actuator based on the valve lift.
Dependencies are inferred from the claim text.