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1. (WO2017039614) INDIVIDUAL CYLINDER PRESSURE ESTIMATION

Pub. No.:    WO/2017/039614    International Application No.:    PCT/US2015/047733
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Tue Sep 01 01:59:59 CEST 2015
IPC: F02M 7/28
Applicants: CUMMINS INC.
Inventors: GARIMELLA, Phanindra, V.
HSIEH, Ming-feng
Title: INDIVIDUAL CYLINDER PRESSURE ESTIMATION
Abstract:
A system and method for determining an estimated absolute in-cylinder pressure for one or more engine cylinders that do not have an in-cylinder pressure sensor. According to certain embodiments, an absolute in-cylinder pressure in a first cylinder may be measured using an in-cylinder pressure sensor. Further, one or more engine dynamics may be measured or determined and used with a model to determine a relative in-cylinder pressure between the first cylinder and the one or more cylinders that do not have an in-cylinder pressure sensor. The measured absolute in-cylinder pressure of the first cylinder may be adjusted using the determined relative in-cylinder pressure(s) to estimate an in-cylinder pressure(s) for the one or more engine cylinders that do not have an in-cylinder pressure sensor.