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：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：US09360463B1

公开(公告)日：2016-06-07

申请号：US14633510

申请日：2015-02-27

Applicant: Caterpillar Inc.

Inventor： Joshua Ratts ,  Wilce Damion Williams ,  Robert D. Clayton, Jr.

IPC: B01J19/00 ,  G01N31/10 ,  G01N31/00

CPC classification number: G01N31/10 ,  B01J19/00 ,  B01J19/0046 ,  G01N31/00

Abstract: A method for testing a condition of a catalyst is provided. The method includes providing a gas source in communication with the catalyst. The method also includes passing compressed gas from the gas source over the catalyst at normal operating temperature. The method further includes invoking a reaction with the catalyst based on the passage of the compressed gas. The method includes measuring a performance of the catalyst based on the reaction.

Abstract translation: 提供了一种用于测试催化剂条件的方法。 该方法包括提供与催化剂连通的气源。 该方法还包括在正常操作温度下将来自气体源的压缩气体通过催化剂。 该方法还包括基于压缩气体的通过引起与催化剂的反应。 该方法包括基于反应测量催化剂的性能。