US Patent No. 10,808,672

DYNAMIC CHARGE COMPRESSION IGNITION ENGINE WITH MULTIPLE AFTERTREATMENT SYSTEMS


Patent No. 10,808,672
Issue Date October 20, 2020
Title Dynamic Charge Compression Ignition Engine With Multiple Aftertreatment Systems
Inventorship Elliott A. Ortiz-Soto, San Jose, CA (US)
Matthew A. Younkins, Campbell, CA (US)
Assignee Tula Technology, Inc., San Jose, CA (US)

Claim of US Patent No. 10,808,672

1. A method of controlling the operation of a variable displacement internal combustion engine having a plurality of working chambers arranged to selectively operate at a reduced effective displacement that is less than full displacement of the internal combustion engine, the method comprising:operating the engine in a firing level modulation mode when operating at the reduced effective displacement, the operation of the engine in the firing level modulation mode involving controlling first working cycles to be fired and to generate a low torque output and controlling second working cycles to be fired and to generate a high torque output, wherein the low torque outputs of the first working cycles are interspersed with the high torque outputs of the second working cycles; and
using different types of working cycles as the first working cycles are fired at the low torque output and the second working cycles are fired at the high torque output, wherein the different types of working cycles include a low temperature gasoline combustion working cycle.