公开(公告)号：US08834820B1

公开(公告)日：2014-09-16

申请号：US13918059

申请日：2013-06-14

Applicant: Caterpillar Inc.

Inventor： Matthew Mowers ,  Karthik Jayasankaran ,  Deepti Bhosekar ,  Jason Bloms ,  Joshua Ratts ,  Aaron Harmon

IPC: B01D53/94 ,  F01N3/18 ,  F01N3/20

CPC classification number: F01N3/208 ,  B01D53/9431 ,  B01D53/9495 ,  F01N2550/02 ,  F01N2610/02 ,  F01N2900/0411 ,  F01N2900/1812 ,  Y02T10/24

Abstract: An emissions control system includes a Selective Catalytic Reduction (SCR) device, one or more monitoring devices and one or more sensors. The system further includes a controller configured to determine an operating emissions gas conversion ratio of the SCR device. The controller is further configured to determine an injection amount of a reduction agent to maintain an operating emissions gas conversion ratio of the SCR device and to adjust the operating emissions gas conversion ratio to a target emissions gas conversion ratio by adjusting the injection amount of the reduction agent to the SCR device. The system utilizes a Time-Temperature model to determine the target emissions gas conversion ratio and/or reduction agent injection ratio. The system further includes a reduction agent injector configured to supply the adjusted injection amount of the reduction agent to the SCR device.

Abstract translation: 排放控制系统包括选择性催化还原（SCR）装置，一个或多个监测装置和一个或多个传感器。 该系统还包括被配置为确定SCR装置的操作排放气体转化率的控制器。 所述控制器还被配置为确定还原剂的喷射量以维持SCR装置的操作排放气体转化率，并且通过调节所述还原剂的喷射量来将所述操作排放气体转化率调整为目标排放气体转化率 代理到SCR设备。 该系统利用时间 - 温度模型来确定目标排放气体转化率和/或还原剂注入比。 该系统还包括还原剂喷射器，该还原剂喷射器构造成将还原剂的调节喷射量提供给SCR装置。

公开(公告)号：US10294888B2

公开(公告)日：2019-05-21

申请号：US15254704

申请日：2016-09-01

Applicant: Caterpillar Inc.

Inventor： Shu Zhang ,  Aaron Harmon ,  Nikhil Lulla

IPC: F01P1/04 ,  F02F3/28 ,  F02B23/06 ,  F02F3/22

Abstract: A piston for an internal combustion engine includes a piston crown having a combustion bowl formed therein, a piston rim extending circumferentially around the combustion bowl and a heat-dissipating chamfer between the combustion bowl and the piston rim. The chamfer is structured by way of at least one of size, angle, or material thickness to an oil gallery to balance heat dissipation with combustion properties. Related methodology is disclosed.

公开(公告)号：US20180058371A1

公开(公告)日：2018-03-01

申请号：US15254704

申请日：2016-09-01

Applicant: Caterpillar Inc.

Inventor： Shu Zhang ,  Aaron Harmon ,  Nikhil Lulla

IPC: F02F3/28 ,  F02F3/22

CPC classification number: F02F3/28 ,  F02B23/0696 ,  F02F3/22 ,  Y02T10/125

Abstract: A piston for an internal combustion engine includes a piston crown having a combustion bowl formed therein, a piston rim extending circumferentially around the combustion bowl and a heat-dissipating chamfer between the combustion bowl and the piston rim. The chamfer is structured by way of at least one of size, angle, or material thickness to an oil gallery to balance heat dissipation with combustion properties. Related methodology is disclosed.

公开(公告)号：US09718037B2

公开(公告)日：2017-08-01

申请号：US14573581

申请日：2014-12-17

Applicant: Caterpillar Inc.

Inventor： Aaron Harmon ,  Andrew M. Denis ,  Anthony C. Rodman ,  Eric P. Spaeth ,  Jayaraman K. Venkataraghavan ,  Raymond U. Isada ,  Yong Yi

IPC: B01F3/04 ,  B01F5/06 ,  B01F5/04

CPC classification number: B01F5/0473 ,  B01F3/04049 ,  B01F5/0617 ,  B01F2005/0639

Abstract: A mixing system for an aftertreatment system is disclosed. The mixing system includes a mixing tube. The mixing tube is provided in fluid communication with an exhaust conduit. The mixing system also includes a reductant injector positioned at an injection location on the mixing tube. The mixing system further includes a mixer assembly positioned downstream of the injection location. The mixer assembly includes a plurality of mixing elements provided in a series arrangement, such that each of the plurality of mixing elements is provided downstream of one another.

公开(公告)号：US20160084135A1

公开(公告)日：2016-03-24

申请号：US14492694

申请日：2014-09-22

Applicant: Caterpillar Inc.

Inventor： Aaron Harmon ,  Joshua Ratts ,  Wilce Williams ,  Adwait Joshi ,  Brandon Abel

IPC: F01N9/00 ,  F01N3/20

CPC classification number: F01N9/005 ,  F01N3/103 ,  F01N3/2066 ,  F01N3/208 ,  F01N13/009 ,  F01N13/0097 ,  F01N13/011 ,  F01N13/017 ,  F01N2590/08 ,  F01N2610/02 ,  F01N2900/0412 ,  F01N2900/0416 ,  F01N2900/1402 ,  F01N2900/1602 ,  F01N2900/1616 ,  F01N2900/1618 ,  F01N2900/1621 ,  F02D41/0235 ,  F02D41/025 ,  F02D41/064 ,  F02D41/068 ,  F02D41/1459 ,  F02D2200/021 ,  F02D2200/0404 ,  F02D2200/0802 ,  Y02A50/2325 ,  Y02T10/24 ,  Y02T10/26 ,  Y02T10/47

Abstract: A system to protect an after treatment system from the effects of hydrocarbon accumulation on a catalyst. An engine system microprocessor using software estimates the amount of hydrocarbon accumulation on the after treatment system based on engine system parameters and other parameters. The accumulated hydrocarbons can cause an exothermic event if the catalyst temperature is allowed to ramp up too quickly. Similarly, accumulated hydrocarbon can temporarily reduce after treatment system performance. In the case of SCR, the microprocessor can control a reductant injector to modulate the amount of reductant being injected into the after treatment system to control the amount of ammonia slip. Alternatively or in addition to, the microprocessor can communicate with proper electronic control modules to modulate the engine system parameters such as engine speed, fuel, and back pressure to control engine exhaust flow temperature during operation of the engine system.

Abstract translation: 一种保护后处理系统免受烃积累对催化剂的影响的系统。 使用软件的发动机系统微处理器基于发动机系统参数和其他参数来估计后处理系统上的碳氢化合物积累量。 如果允许催化剂温度升高太快，累积的烃会引起放热事件。 类似地，积累的碳氢化合物可以在处理系统性能后暂时降低。 在SCR的情况下，微处理器可以控制还原剂注入器来调节注入到后处理系统中的还原剂的量以控制氨的滑移量。 或者或另外，微处理器可以与适当的电子控制模块进行通信，以调节发动机系统参数，例如发动机速度，燃料和背压，以在发动机系统运行期间控制发动机排气流量温度。

公开(公告)号：US20160175784A1

公开(公告)日：2016-06-23

申请号：US14573581

申请日：2014-12-17

Applicant: Caterpillar Inc.

Inventor： Aaron Harmon ,  Andrew M. Denis ,  Anthony C. Rodman ,  Eric P. Spaeth ,  Jayaraman K. Venkataraghavan ,  Raymond U. Isada ,  Yong Yi

IPC: B01F5/04 ,  B01F15/02

CPC classification number: B01F5/0473 ,  B01F3/04049 ,  B01F5/0617 ,  B01F2005/0639

Abstract: A mixing system for an aftertreatment system is disclosed. The mixing system includes a mixing tube. The mixing tube is provided in fluid communication with an exhaust conduit. The mixing system also includes a reductant injector positioned at an injection location on the mixing tube. The mixing system further includes a mixer assembly positioned downstream of the injection location. The mixer assembly includes a plurality of mixing elements provided in a series arrangement, such that each of the plurality of mixing elements is provided downstream of one another.

Abstract translation: 公开了一种后处理系统的混合系统。 混合系统包括混合管。 混合管设置成与排气管道流体连通。 混合系统还包括定位在混合管上的注射位置的还原剂喷射器。 混合系统还包括位于注射位置下游的混合器组件。 混合器组件包括以串联方式设置的多个混合元件，使得多个混合元件中的每一个被设置在彼此的下游。