Method of crank signal disturbance compensation
AssigneeGM Global Technology Operations LLC
InventorsDavid S. Mathews, Tameem K. Assaf, Ronald J. Kubani, David L. St. Pierre, Yong Xu
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Abstract
An engine system that compensates for disturbances in a crankshaft signal is provided. The system includes: an error module that computes an error between an ideal period and an actual period of a crankshaft signal; a correction factor module that determines a correction factor based on the error; and a compensation module that applies the correction factor to the actual period of the crankshaft signal.
Claims15
An engine system that compensates for disturbances in a crankshaft signal, comprising:
- an error module that computes an error between an ideal period and an actual period of a crankshaft signal;
- a correction factor module that determines a correction factor based on the error;
- and
- a compensation module that applies the correction factor to the actual period of the crankshaft signal,
- wherein the error module computes the ideal period from a position equation,
- wherein the error module determines an average period and an average angular acceleration for K number of reference periods, and
- wherein the ideal period is computed from an initial angular velocity, the average period, and the average angular acceleration.
A method of compensating for disturbances in a crankshaft signal, comprising:
- determining an actual period, an angular velocity, and an angular acceleration for K reference periods from a crankshaft position signal;
- computing an ideal period of rotation based on the actual period, the angular velocity, and the angular acceleration for the K reference periods;
- generating an error term for each of the K reference periods based on the ideal period and the corresponding actual period;
- computing a correction factor for each of the K reference periods based on the error term;
- and
- applying the correction factor based on the error term of the corresponding actual period to compensate for disturbances in the crankshaft signal.
Dependencies are inferred from the claim text.