公开(公告)号：US20180030907A1

公开(公告)日：2018-02-01

申请号：US15225464

申请日：2016-08-01

Applicant: Caterpillar Inc.

Inventor： Deepti Bhosekar ,  Venkat Vijay Kishore Turlapati ,  Brett A. Zook ,  Andrew J. Loetz

IPC: F02D19/02 ,  F02D23/00 ,  F02B43/12 ,  F02M21/02 ,  F02B43/10 ,  F02B43/04

Abstract: A reformer system may include a reformer device having a fuel inlet, an air inlet and a gas outlet, a first valve set coupled to the fuel inlet and configured to selectively supply a reformer fuel flow from an engine fuel flow to the fuel inlet, a second valve set coupled to the air inlet and configured to selectively supply a reformer air flow from a compressor outlet air flow to the air inlet, and a controller in electrical communication with the first valve set and the second valve set. The controller may determine a target reformer fuel flow based on a target gas flow, determine a target reformer air flow based on the reformer fuel flow and a target air-to-fuel ratio, adjust the reformer fuel flow according to the target reformer fuel flow, and adjust the reformer air flow according to the target reformer air flow.

公开(公告)号：US20220268232A1

公开(公告)日：2022-08-25

申请号：US17181231

申请日：2021-02-22

Applicant: Caterpillar Inc.

Inventor： Brett A. Zook ,  Christopher F. Gallmeyer ,  Karthik Jayasankaran ,  Kamalakannan Thammireddi Vajram

IPC: F02D41/22 ,  F02D41/00

Abstract: Operating a gaseous fuel engine system includes determining a detonation level in combustion cylinders in an engine in the gaseous fuel engine system, comparing the detonation level to a detonation level limit, calculating a detonation error, and limiting an engine load of the engine to a derated engine load level based on a reduction to intake manifold air pressure (IMAP) that is performed responsive to the detonation error. The gaseous fuel engine system can be operated at a reduced, derated engine load, rather than being shut down, and permitted to increase in engine load level as detonation events clear. Related control logic and structure are disclosed.

公开(公告)号：US11434842B1

公开(公告)日：2022-09-06

申请号：US17181231

申请日：2021-02-22

Applicant: Caterpillar Inc.

Inventor： Brett A. Zook ,  Christopher F. Gallmeyer ,  Karthik Jayasankaran ,  Kamalakannan Thammireddi Vajram

IPC: F02D41/22 ,  F02D41/00

Abstract: Operating a gaseous fuel engine system includes determining a detonation level in combustion cylinders in an engine in the gaseous fuel engine system, comparing the detonation level to a detonation level limit, calculating a detonation error, and limiting an engine load of the engine to a derated engine load level based on a reduction to intake manifold air pressure (IMAP) that is performed responsive to the detonation error. The gaseous fuel engine system can be operated at a reduced, derated engine load, rather than being shut down, and permitted to increase in engine load level as detonation events clear. Related control logic and structure are disclosed.

公开(公告)号：US10815912B2

公开(公告)日：2020-10-27

申请号：US15225464

申请日：2016-08-01

Applicant: Caterpillar Inc.

Inventor： Deepti Bhosekar ,  Venkat Vijay Kishore Turlapati ,  Brett A. Zook ,  Andrew J. Loetz

IPC: F02D19/02 ,  F02B43/04 ,  F02B43/12 ,  F02M21/02 ,  F02D23/00 ,  F02D41/00 ,  F02B43/10 ,  F02M31/04 ,  F02B29/04

Abstract: A reformer system may include a reformer device having a fuel inlet, an air inlet and a gas outlet, a first valve set coupled to the fuel inlet and configured to selectively supply a reformer fuel flow from an engine fuel flow to the fuel inlet, a second valve set coupled to the air inlet and configured to selectively supply a reformer air flow from a compressor outlet air flow to the air inlet, and a controller in electrical communication with the first valve set and the second valve set. The controller may determine a target reformer fuel flow based on a target gas flow, determine a target reformer air flow based on the reformer fuel flow and a target air-to-fuel ratio, adjust the reformer fuel flow according to the target reformer fuel flow, and adjust the reformer air flow according to the target reformer air flow.

公开(公告)号：US09856803B2

公开(公告)日：2018-01-02

申请号：US14851129

申请日：2015-09-11

Applicant: Caterpillar Inc.

Inventor： Jeff Howard ,  Timothy B. James ,  Todd A. Rezac ,  Brett A. Zook ,  David J. Lin ,  Gary Boyer ,  Robert Maxson

IPC: F02B33/44 ,  F02D41/00 ,  F02B63/04 ,  F02B43/10 ,  F02B21/00 ,  F02B37/02 ,  B60K3/00 ,  F02B37/10 ,  F02D41/10

CPC classification number: F02D41/0027 ,  B60K3/00 ,  F02B21/00 ,  F02B37/02 ,  F02B37/10 ,  F02B43/10 ,  F02B63/04 ,  F02B2043/103 ,  F02D41/0007 ,  F02D41/10 ,  Y02T10/144 ,  Y02T10/32

Abstract: A natural gas engine system may have an engine having at least one cylinder. The engine may also have an intake manifold configured to deliver air for combustion to the cylinder and an exhaust manifold configured to discharge exhaust from the cylinder. The natural gas engine system may have a generator coupled to the engine. The generator may be configured to generate electrical power for an electrical load. The natural gas engine system may have a fuel source configured to supply natural gas for combustion in the engine, and an air tank in fluid communication with the intake manifold and the exhaust manifold. Further, the natural gas engine system may have a controller. The controller may be configured to direct a first amount of air from the air tank to the exhaust manifold and a second amount of air from the air tank to the intake manifold.

公开(公告)号：US20140290614A1

公开(公告)日：2014-10-02

申请号：US13851377

申请日：2013-03-27

Applicant: Caterpillar Inc.

Inventor： Arvind Sivasubramanian ,  Christopher F. Gallmeyer ,  David J. Lin ,  Brett A. Zook

IPC: F02D41/00

CPC classification number: F02D41/0097 ,  F02D31/002 ,  F02D31/007 ,  F02D41/062 ,  F02D41/067 ,  Y02T10/42

Abstract: An engine system includes a fuel supply unit configured to supply fuel into a combustion chamber. The engine system includes a fuel supply unit to regulate the supply of fuel into an inlet port via a fuel rail and an air supply unit configured to supply compressed air into the combustion chamber. A control system is configured to receive operating conditions of the engine system. Further, the control system includes a detector component configured to generate a control signal indicative of a start-up condition of an engine system. A switching component of the controller receives the control signal indicative of the start-up condition of the engine system from the detector component and further transmits a fuel supply control signal to the fuel valve based on an air-fuel ratio error signal, and transmit an air supply control signal to the choke valve based on an engine speed error signal.

Abstract translation: 发动机系统包括被配置为将燃料供应到燃烧室中的燃料供应单元。 发动机系统包括：燃料供给单元，其经由燃料轨调节进入入口的燃料供给;以及空气供给单元，其构造成将压缩空气供给到燃烧室。 控制系统被配置为接收发动机系统的操作条件。 此外，控制系统包括被配置为产生指示发动机系统的启动状态的控制信号的检测器部件。 控制器的切换部件从检测器部件接收表示发动机系统的启动状态的控制信号，并且还基于空燃比误差信号向燃料阀发送燃料供给控制信号， 基于发动机转速误差信号向阻流阀供气控制信号。