US Patent No. 10,519,876

CONTROLLER SYSTEM AND METHOD FOR SELECTING A FIRING FRACTION FOR A SKIP FIRE CONTROLLED INTERNAL COMBUSTION ENGINE BASED AT LEAST ON NON-DRIVE TRAIN LEVELS OF NOISE, VIBRATION AND HARSHNESS


Patent No. 10,519,876
Issue Date December 31, 2019
Title Controller System And Method For Selecting A Firing Fraction For A Skip Fire Controlled Internal Combustion Engine Based At Least On Non-drive Train Levels Of Noise, Vibration And Harshness
Inventorship Vijay Srinivasan, Farmington Hills, MI (US)
Louis J. Serrano, Los Gatos, CA (US)
Siamak Hashemi, Farmington Hills, MI (US)
Robert S. Bailey, San Jose, CA (US)
Geoffrey Routledge, Gilroy, CA (US)
Assignee Tula Technology, Inc., San Jose, CA (US)

Claim of US Patent No. 10,519,876

1. A skip fire engine controller, comprising:a skip fire profile module arranged to monitor noise and vibration generated by one or more sources external to an engine and determine an operational firing fraction and associated cylinder load for delivering a desired engine output, wherein the selection of the operational firing fraction is based at least in part on whether the noise and vibration generated external to the engine at least partially masks noise and vibration generated by the engine; and
a firing controller arranged to direct firings of one or more cylinders of the engine in a skip fire manner that delivers the selected operational firing fraction,
wherein the engine when operating at the selected operational firing fraction has at least one cylinder that is fired, skipped and either fired or skipped over successive firing opportunities.