US Patent No. 9,726,094

SYSTEM FOR MANAGING CATALYTIC CONVERTER TEMPERATURE


Patent No. 9,726,094
Issue Date August 08, 2017
Title System For Managing Catalytic Converter Temperature
Inventorship Matthew A. Younkins, San Jose, CA (US)
Ram Subramanian, Saratoga, CA (US)
Leo Breton, Washington, DC (US)
Assignee Tula Technology, Inc., San Jose, CA (US)

Claim of US Patent No. 9,726,094

1. An engine controller for operating an internal combustion engine in a skip fire manner, the engine controller including
a plurality of working chambers, the engine controller comprising:
a catalytic monitor arranged to obtain data relating to a temperature of a catalytic converter wherein the catalytic converter
temperature data is obtained from one selected from the group consisting of a catalytic converter temperature model and a
sensed catalytic converter temperature; and

a firing timing determination unit that is arranged to determine a firing sequence for operating the working chambers of the
engine in a skip fire manner wherein the firing sequence is generated at least in part based on the catalytic converter temperature
data; and

wherein the firing timing determination unit is arranged to perform firings only in a first subset of the working chambers
and not in a second subset of the working chambers during an engine startup period.