公开(公告)号：US10570863B1

公开(公告)日：2020-02-25

申请号：US16134170

申请日：2018-09-18

Applicant: Caterpillar Inc.

Inventor： Wade Robel ,  Thomas Jeffrey Crowell ,  Lifeng Wang

IPC: F02M55/04 ,  F02M47/02 ,  F02M55/00 ,  F01L1/18

Abstract: A fuel injector includes an injector body, and a plunger movable within a plunger cavity in the injector body. The fuel injector also includes a spill valve positioned at least partially within a main fuel passage, a fill passage forming a fluid connection between the plunger cavity and the main fuel passage, and a cross passage forming a second fluid connection between the plunger cavity and the main fuel passage. The fuel injector also includes a metering edge within the plunger cavity and positioned such that the plunger passes the metering edge during pumping to the plunger for valvetrain noise suppression. A metering slot may be formed in the injector body or the plunger.

公开(公告)号：US20200232365A1

公开(公告)日：2020-07-23

申请号：US16251724

申请日：2019-01-18

Applicant: Caterpillar Inc.

Inventor： Wade Robel

IPC: F01N3/20 ,  F01N3/035 ,  F01N3/08 ,  B01D53/94

Abstract: A compression ignition internal combustion engine system includes an engine and an exhaust system with an upstream exhaust conduit, a downstream exhaust conduit, and an exhaust placement mechanism for mixing exhaust with fuel and air within engine cylinders. The upstream exhaust conduit has a raw exhaust inlet, a raw exhaust outlet, and a diesel exhaust fluid (DEF) inlet between the raw exhaust inlet and the raw exhaust outlet. The downstream exhaust conduit includes a bare particulate filter and a selective catalytic reduction (SCR) device. Related methodology including operating the engine in a startup mode, and in a running mode once the SCR device is warmed, is also disclosed.

公开(公告)号：US11268418B2

公开(公告)日：2022-03-08

申请号：US16251724

申请日：2019-01-18

Applicant: Caterpillar Inc.

Inventor： Wade Robel

IPC: F01N3/10 ,  F01N3/20 ,  F01N3/035 ,  B01D53/94 ,  F01N3/08

Abstract: A compression ignition internal combustion engine system includes an engine and an exhaust system with an upstream exhaust conduit, a downstream exhaust conduit, and an exhaust placement mechanism for mixing exhaust with fuel and air within engine cylinders. The upstream exhaust conduit has a raw exhaust inlet, a raw exhaust outlet, and a diesel exhaust fluid (DEF) inlet between the raw exhaust inlet and the raw exhaust outlet. The downstream exhaust conduit includes a bare particulate filter and a selective catalytic reduction (SCR) device. Related methodology including operating the engine in a startup mode, and in a running mode once the SCR device is warmed, is also disclosed.

公开(公告)号：US10830191B1

公开(公告)日：2020-11-10

申请号：US16544757

申请日：2019-08-19

Applicant: Caterpillar Inc.

Inventor： Wade Robel ,  Spencer Huhn

IPC: F02M26/52 ,  F02D13/04 ,  F02M26/00

Abstract: A system is disclosed that may include a gas recirculation passageway configured to recirculate gas exiting an engine to an intake of the engine prior to the gas reaching an aftertreatment system associated with the engine. The system may include a valve configured to control a gas recirculation of the gas recirculation passageway. The system may include a controller configured to cause, during a compression braking procedure for the engine, actuation of the valve to produce the gas recirculation when the aftertreatment system is performing an operation that is temperature-dependent.

公开(公告)号：US20200088146A1

公开(公告)日：2020-03-19

申请号：US16134170

申请日：2018-09-18

Applicant: Caterpillar Inc.

Inventor： Wade Robel ,  Thomas Jeffrey Crowell ,  Lifeng Wang

IPC: F02M55/04 ,  F02M55/00 ,  F01L1/18 ,  F02M47/02

Abstract: A fuel injector includes an injector body, and a plunger movable within a plunger cavity in the injector body. The fuel injector also includes a spill valve positioned at least partially within a main fuel passage, a fill passage forming a fluid connection between the plunger cavity and the main fuel passage, and a cross passage forming a second fluid connection between the plunger cavity and the main fuel passage. The fuel injector also includes a metering edge within the plunger cavity and positioned such that the plunger passes the metering edge during pumping to the plunger for valvetrain noise suppression. A metering slot may be formed in the injector body or the plunger.