US Patent No. 9,494,088

AVERAGING FILTER FOR SKIP FIRE ENGINE OPERATION


Patent No. 9,494,088
Issue Date November 15, 2016
Title Averaging Filter For Skip Fire Engine Operation
Inventorship Louis J. Serrano, Los Gatos, CA (US)
Mohammad R. Pirjaberi, San Jose, CA (US)
Charles H. Loucks, Santa Clara, CA (US)
Assignee Tula Technology, Inc., San Jose, CA (US)

Claim of US Patent No. 9,494,088

1. A method comprising:
operating an engine in an operating mode having a plurality of different effective firing fractions;
measuring an engine operating parameter during the operation of the engine at a current firing fraction having an effective
firing fraction of less than one;

averaging the measured operating parameter over a period that is based on and varies with changes in at least one of (i) a
denominator of the current firing fraction, and (ii) a repeating firing sequence length associated with the current firing
fraction; and

using the averaged measured operating parameter as the value of the measured operating parameter in an engine control calculation
or operation during the operation of the engine.