US Patent No. 10,012,161

TORQUE ESTIMATION IN A SKIP FIRE ENGINE CONTROL SYSTEM


Patent No. 10,012,161
Issue Date July 03, 2018
Title Torque Estimation In A Skip Fire Engine Control System
Inventorship Mark A. Shost, Northville, MI (US)
Ihab S. Soliman, Washington, MI (US)
James J. Daley, Jackson, MI (US)
Assignee Tula Technology, Inc., San Jose, CA (US) FCA US LLC, Auburn Hills, MI (US...

Claim of US Patent No. 10,012,161

1. A method for performing diagnostics on a skip fire engine control system, the skip fire engine control system including an engine having a plurality of working chambers, the method comprising:calculating an operational engine torque;
operating an engine in a skip fire manner to deliver the operational engine torque;
calculating a reference engine torque using a torque model wherein the torque model involves estimating torque individually for each working chamber;
comparing the reference engine torque to the operational engine torque to assess accuracy of the operational engine torque calculation;
identifying a potential error when a discrepancy between the calculated reference engine torque and the calculated operational engine torque exceeds a threshold; and
performing an action in response to the identification of the potential error.