US Patent No. 9,964,051


Patent No. 9,964,051
Issue Date May 08, 2018
Title Firing Fraction Management In Skip Fire Engine Control
Inventorship Mohammad R. Pirjaberi, San Jose, CA (US)
Adya S. Tripathi, San Jose, CA (US)
Louis J. Serrano, Los Gatos, CA (US)
Assignee Tula Technology, Inc., San Jose, CA (US)

Claim of US Patent No. 9,964,051

1. A engine controller suitable for directing operation of an engine in a skip fire manner, the engine controller comprising:a firing fraction determining unit arranged to determine an operational firing fraction and associated engine settings for delivering a desired engine output, wherein the firing fraction determining unit is arranged to select the operational firing fraction from a set of available firing fractions; and
a firing controller arranged to direct firings in a skip fire manner that delivers the selected operational firing fraction, wherein the firing controller includes an accumulator that helps smooth transitions between different firing fractions; and
wherein all of the firing fractions in the set of available firing fractions other than a firing fraction of one, are simple fractions having an integer denominator of no more than 15.