公开(公告)号：US20240093659A1

公开(公告)日：2024-03-21

申请号：US18511375

申请日：2023-11-16

Applicant: Caterpillar Inc.

Inventor： Aaron S. Ness ,  Andrew J. Loetz ,  John R. Brubaker ,  Christopher L. Batta

IPC: F02F3/24

CPC classification number: F02F3/24

Abstract: A piston may have an annular body including a crown portion defining a longitudinal axis, a radial direction perpendicular to the longitudinal axis, a plane containing the longitudinal axis and the radial direction, and a contoured combustion bowl. In the plane containing the longitudinal axis and the radial direction, the crown portion includes a radially outer squish surface, and a swirl pocket having a reentrant surface that extends axially downwardly and radially outwardly from the squish surface defining a tangent that forms a reentrant angle with the squish surface that ranges from 53.0 degrees to 57.0 degrees.

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：US12037961B1

公开(公告)日：2024-07-16

申请号：US18352019

申请日：2023-07-13

Applicant: Caterpillar Inc.

Inventor： Aaron Ness ,  Andrew J. Loetz ,  Adam J. Clute ,  Sri Harsha Uddanda

IPC: F02B3/00 ,  F02F3/26

CPC classification number: F02F3/26

Abstract: A piston for an internal combustion engine includes a piston skirt and a piston crown attached to the piston skirt and including a combustion face. The combustion face forms a piston rim and a combustion bowl. A bowl edge defines an intersection of the combustion bowl and the piston rim, and a reentrant surface defining a reentrancy angle extends between the bowl edge and a bowl outer wall. A ratio of a bowl depth dimension coincident with the piston center axis to a compression height dimension coincident with the piston center axis is from about 0.30 to about 0.35.

公开(公告)号：US11840983B2

公开(公告)日：2023-12-12

申请号：US17677370

申请日：2022-02-22

Applicant: Caterpillar Inc.

Inventor： Aaron S. Ness ,  Andrew J. Loetz ,  John R. Brubaker ,  Christopher L. Batta

IPC: F02B23/00 ,  F02F3/24

CPC classification number: F02F3/24

Abstract: A piston may have an annular body including a crown portion defining a longitudinal axis, a radial direction perpendicular to the longitudinal axis, a plane containing the longitudinal axis and the radial direction, and a contoured combustion bowl. In the plane containing the longitudinal axis and the radial direction, the crown portion includes a radially outer squish surface, and a swirl pocket having a reentrant surface that extends axially downwardly and radially outwardly from the squish surface defining a tangent that forms a reentrant angle with the squish surface that ranges from 53.0 degrees to 57.0 degrees.

公开(公告)号：US11047341B2

公开(公告)日：2021-06-29

申请号：US16188996

申请日：2018-11-13

Applicant: Caterpillar Inc.

Inventor： Andrew J. Loetz

IPC: F02M25/03 ,  F02M25/022 ,  F02B19/12 ,  F02B47/02

Abstract: A system and method for combustion in an engine includes a combustion chamber, a prechamber, and a fluid injector. The prechamber extends from a first end to a second is fluidly connected to the combustion chamber through at least one port positioned at the first end of the prechamber. The fluid injector is configured to introduce a fluid into the prechamber following combustion of an air-fuel mixture within the prechamber and positioned to introduce the fluid into the prechamber at the second end of the prechamber.

公开(公告)号：US20160069251A1

公开(公告)日：2016-03-10

申请号：US14940179

申请日：2015-11-13

Applicant: Caterpillar Inc.

Inventor： Andrew J. Loetz

IPC: F02B19/18

CPC classification number: F02B19/18 ,  F02B19/06 ,  F02B19/108 ,  F02M21/0275 ,  Y02T10/125

Abstract: An engine with a main combustion chamber and a pre-combustion chamber assembly is provided. The pre-combustion chamber assembly includes a pre-combustion chamber, a pressure-limiting device, and a fluid conduit. The pressure-limiting device includes a first end and a second end. The first end includes a spring. The second end is exposed to the pre-combustion chamber. The pressure-limiting device is operable in a passive state and an active state. The fluid conduit is disposed between the main combustion chamber and the first end of the pressure-limiting device to facilitate fluid communication between the main combustion chamber and the pressure-limiting device. The pressure-limiting device is actuated to the active state when fluid pressure in the pre-combustion chamber reaches a threshold value during pre-chamber combustion. In the active state, the pressure-limiting device moves away from the pre-combustion chamber, to increase a volume in the pre-combustion chamber.

Abstract translation: 提供具有主燃烧室和预燃室组件的发动机。 预燃室组件包括预燃室，压力限制装置和流体导管。 压力限制装置包括第一端和第二端。 第一端包括一个弹簧。 第二端暴露于预燃室。 压力限制装置可操作在被动状态和活动状态。 流体导管设置在主燃烧室和压力限制装置的第一端之间，以便于主燃烧室和压力限制装置之间的流体连通。 当预燃室内的流体压力达到阈值时，压力限制装置被致动到活动状态。 在活动状态下，限压装置移动远离预燃室，以增加预燃室中的体积。

公开(公告)号：US20160053668A1

公开(公告)日：2016-02-25

申请号：US14929440

申请日：2015-11-02

Applicant: Caterpillar Inc.

Inventor： Andrew J. Loetz ,  Joel D. Hiltner

IPC: F02B19/10 ,  F02B19/18 ,  F02B19/12

CPC classification number: F02B19/1085 ,  F02B19/1014 ,  F02B19/108 ,  F02B19/12 ,  F02B19/18 ,  F02B43/00 ,  Y02T10/125

Abstract: A prechamber assembly for an engine is provided. The prechamber assembly includes a prechamber located upstream of a main combustion chamber and adapted to receive fuel from a fuel supply system of the engine. The prechamber includes a first portion, a taper portion, and a second portion. The prechamber assembly further includes a fuel injection member located downstream of the taper portion of the prechamber and fluidly connected to the second portion of the prechamber. The fuel injection member is inclined at an angle with respect to a central axis of the prechamber. The fuel injection member is in electric communication with a controller. The controller is configured to actuate the fuel injection member to supply the fuel into the second portion of the prechamber to provide rich mixing of the fuel with an air-fuel mixture received from the main combustion chamber during operation of the engine.

Abstract translation: 提供了一种用于发动机的预制器组件。 前房组件包括位于主燃烧室上游并适于从发动机的燃料供应系统接收燃料的预燃室。 前置室包括第一部分，锥形部分和第二部分。 预燃室组件还包括燃料喷射构件，该燃料喷射构件位于预燃室的锥形部分的下游并且流体地连接到预燃室的第二部分。 燃料喷射构件相对于预制室的中心轴线倾斜一定角度。 燃料喷射构件与控制器电连通。 控制器被配置为致动燃料喷射构件以将燃料供应到预燃室的第二部分中，以在发动机运行期间提供燃料与从主燃烧室接收的空气燃料混合物的丰富混合。

公开(公告)号：US12264636B2

公开(公告)日：2025-04-01

申请号：US18511375

申请日：2023-11-16

Applicant: Caterpillar Inc.

Inventor： Aaron S. Ness ,  Andrew J. Loetz ,  John R. Brubaker ,  Christopher L. Batta

IPC: F02B23/00 ,  F02F3/24

Abstract: A piston may have an annular body including a crown portion defining a longitudinal axis, a radial direction perpendicular to the longitudinal axis, a plane containing the longitudinal axis and the radial direction, and a contoured combustion bowl. In the plane containing the longitudinal axis and the radial direction, the crown portion includes a radially outer squish surface, and a swirl pocket having a reentrant surface that extends axially downwardly and radially outwardly from the squish surface defining a tangent that forms a reentrant angle with the squish surface that ranges from 53.0 degrees to 57.0 degrees.

公开(公告)号：US20230265810A1

公开(公告)日：2023-08-24

申请号：US17677370

申请日：2022-02-22

Applicant: Caterpillar Inc.

Inventor： Aaron S. Ness ,  Andrew J. Loetz ,  John R. Brubaker ,  Christopher L. Batta

IPC: F02F3/24

CPC classification number: F02F3/24

Abstract: A piston may have an annular body including a crown portion defining a longitudinal axis, a radial direction perpendicular to the longitudinal axis, a plane containing the longitudinal axis and the radial direction, and a contoured combustion bowl. In the plane containing the longitudinal axis and the radial direction, the crown portion includes a radially outer squish surface, and a swirl pocket having a reentrant surface that extends axially downwardly and radially outwardly from the squish surface defining a tangent that forms a reentrant angle with the squish surface that ranges from 53.0 degrees to 57.0 degrees.

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.