Mohammad R. Pirjaberi, San Jose, CA (US)
Louis J. Serrano, Los Gatos, CA (US)
Xin Yuan, Palo Alto, CA (US)
Steven E. Carlson, Oakland, CA (US)
Siamak Hashemi, Farmington Hills, MI (US)
Ryan A. Kuhlenbeck, San Francisco, CA (US)
1. An engine controller comprising:a firing fraction determining unit arranged to determine a desired operational firing fraction during operation of the engine; and
a transition adjustment unit arranged to manage transitions from a first firing fraction requested by the firing fraction determining unit to a target firing fraction requested by the firing fraction determining unit that is different from the first firing fraction, the transition adjustment unit being configured to gradually alter a commanded firing fraction from the first firing fraction to the target firing fraction, wherein the commanded firing fraction is altered each firing opportunity.