公开(公告)号：US11920528B1

公开(公告)日：2024-03-05

申请号：US18198408

申请日：2023-05-17

Applicant: Caterpillar Inc.

Inventor： Michael T. Graziano, Jr. ,  Eric L. Schroeder ,  Christopher R. Gehrke ,  Jaswinder Singh ,  Patrick J. Seiler ,  Andrew J. Neaville ,  Geetika Dilawari ,  Zachary S. Engstrom

IPC: F02D41/00 ,  F02B43/12 ,  F02D41/38

CPC classification number: F02D41/0027 ,  F02B43/12 ,  F02D41/38 ,  F02D2041/389 ,  F02D2200/024

Abstract: Operating a gaseous fuel engine system includes detecting preignition in one or more of a plurality of cylinders based on a monitored cylinder pressure during combustion of a gaseous fuel such as a gaseous hydrogen fuel. Operating a gaseous fuel engine system also includes reducing a fuel injection amount for the one or more of the plurality of cylinders to a derated fuel injection amount that is based on a timing of the detected preignition. Fuel injection amount may be reduced to a greater relative extent if detected preignition is early, and to a lesser relative extent if detected preignition is later, in an engine cycle. Related apparatus and control logic is also disclosed.