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.

公开(公告)号：US20160319765A1

公开(公告)日：2016-11-03

申请号：US14699586

申请日：2015-04-29

Applicant: Caterpillar Inc.

Inventor： Andrew J. Neaville

IPC: F02D41/38 ,  F02D41/26 ,  F02D41/00 ,  F02D41/24

CPC classification number: F02D41/0025 ,  F02D19/023 ,  F02D19/027 ,  F02D19/105 ,  F02D41/0027 ,  F02D41/20 ,  F02D41/26 ,  F02D41/345 ,  F02D2041/2051 ,  F02D2041/2055 ,  F02D2041/2058 ,  F02D2041/281 ,  F02M21/0233 ,  F02M21/0239 ,  Y02T10/32 ,  Y02T10/36 ,  Y02T10/44

Abstract: An internal combustion engine including a fuel system and cylinders is described. A gaseous fuel admission valve is associated with each cylinder and configured to connect the fuel system with each respective cylinder. A control unit is electrically connected to each of gaseous fuel admission valves and, for each gaseous fuel admission valve, configured to provide an opening electrical current to open the gaseous fuel admission valve, a holding electrical current to hold the gaseous fuel admission valve in an open position and a detection electrical current to detect the position of the gaseous fuel admission valve. The control unit is further configured to determine whether the gaseous fuel admission valve is closed based on the time required to achieve the detection electrical current.

Abstract translation: 描述了包括燃料系统和气缸的内燃机。 气体燃料入口阀与每个气缸相关联并且构造成将燃料系统与每个相应气缸相连接。 控制单元电连接到每个气体燃料入口阀，并且对于每个气体燃料入口阀，配置为提供打开的电流以打开气体燃料入口阀，保持电流以将气体燃料入口阀保持在 打开位置和检测电流以检测气体燃料入口阀的位置。 控制单元还被配置为基于实现检测电流所需的时间来确定气体燃料入口阀是否关闭。