公开(公告)号：US09890678B2

公开(公告)日：2018-02-13

申请号：US14503414

申请日：2014-10-01

申请人： Baohua Qi

发明人： Baohua Qi

IPC分类号： F01N3/00 ,  F01N3/20 ,  F01N9/00 ,  F01N13/00

CPC分类号： F01N3/208 ,  F01N9/00 ,  F01N13/0093 ,  F01N2610/02 ,  F01N2610/14 ,  F01N2610/146 ,  F01N2900/0408 ,  F01N2900/1621 ,  F01N2900/1818 ,  Y02T10/24 ,  Y02T10/47

摘要： A multi-stage SCR control system including a front reductant dosing device, a front SCR device, a back reductant dosing device, a back SCR device, and a dosing controller. In normal control cycles, a NSR of the front SCR device is controlled below a stoichiometric reaction ratio to decrease system sensitivity to catalyst aging. In a diagnostic cycle, the NSR of the front or the back SCR device is controlled lower than the stoichiometric reaction ratio, and a reductant quality ratio, which is indicative of reductant quality and dosing accuracy, is calculated. In another diagnostic cycle, the NSR is controlled above the stoichiometric reaction ratio, and an average deNOx efficiency is calculated. The reductant quality ratio and the average deNOx efficiency values are further used in SCR feedback control and permanent catalyst damages can also be isolated from temporary catalyst poisons with these values after a thermal recovery event is completed.

公开(公告)号：US20180016901A1

公开(公告)日：2018-01-18

申请号：US15652997

申请日：2017-07-18

申请人： AVL LIST GMBH ,  FPT INDUSTRIAL S.P.A. ,  IVECO S.P.A.

发明人： MICHAEL GLENSVIG ,  Markus Thaler ,  Susanne Mahler

IPC分类号： F01B25/26 ,  F01K23/10 ,  F22B1/18 ,  G08B21/18

CPC分类号： F01B25/26 ,  F01K23/065 ,  F01K23/101 ,  F01N3/0205 ,  F01N3/103 ,  F01N5/02 ,  F01N11/00 ,  F01N2550/00 ,  F01N2560/06 ,  F01N2560/14 ,  F01N2900/0408 ,  F01N2900/08 ,  F01N2900/1404 ,  F22B1/1807 ,  G08B21/187 ,  Y02T10/166

摘要： Temperatures of exhaust gas upstream and downstream of an oxidation catalytic converter in an exhaust gas line of an internal combustion engine are measured and the differences analyzed to detect a leakage in the EGR evaporator.

公开(公告)号：US20180010500A1

公开(公告)日：2018-01-11

申请号：US15548298

申请日：2016-02-04

申请人： MAN DIESEL & TURBO SE

发明人： Andreas DÖRING ,  Plamen TOSHEV

IPC分类号： F01N3/10 ,  F01N13/00 ,  F01N3/20

CPC分类号： F01N3/106 ,  F01N3/103 ,  F01N3/2066 ,  F01N3/208 ,  F01N13/009 ,  F01N13/0093 ,  F01N2430/06 ,  F01N2430/08 ,  F01N2560/026 ,  F01N2570/12 ,  F01N2570/14 ,  F01N2610/02 ,  F01N2900/0408 ,  F01N2900/1402 ,  F02B43/00 ,  Y02T10/24

摘要： Method for operating an internal combustion engine which has a gas combustion system and an exhaust gas post-treatment system. Exhaust gas that leaves the gas combustion system is directed to at least one CH4 oxidation catalytic converter of the exhaust gas post-treatment system. The CH4/NO2 mole ratio in the exhaust gas is set in a defined fashion by at least one gas-combustion-system-side and/or exhaust-gas-post-treatment-system-side measure upstream of at least one CH4 oxidation catalytic converter.

公开(公告)号：US20170130637A1

公开(公告)日：2017-05-11

申请号：US15345672

申请日：2016-11-08

申请人： Robert Bosch GmbH

发明人： Alexander Franz ,  Cornelia Nagel ,  Tobias Pfister

IPC分类号： F01N11/00 ,  F01N3/20

CPC分类号： F01N11/00 ,  F01N3/035 ,  F01N3/2066 ,  F01N3/208 ,  F01N13/0093 ,  F01N2550/02 ,  F01N2900/0408 ,  F01N2900/0411 ,  F01N2900/16 ,  F01N2900/1621 ,  F01N2900/1626 ,  Y02T10/24 ,  Y02T10/47

摘要： In a method for diagnosing an SCR catalyst system of an internal combustion engine, the SCR catalyst system comprises at least one first SCR catalyst device (20) and at least one second SCR catalyst device (30). A first injection position upstream of the first SCR catalyst device (20) in the form of a first metering device (40) is provided for injecting liquid reducing agent for the SCR catalyst devices (20, 30). A second injection position between the two SCR catalyst devices (20, 30) in the form of a second metering device (50) is furthermore provided. Both SCR catalyst devices (20, 30) are monitored in a differentiated way by means of active and passive diagnostic methods.

公开(公告)号：US09611793B2

公开(公告)日：2017-04-04

申请号：US14451025

申请日：2014-08-04

申请人： Caterpillar Inc.

发明人： Ryan T. Sunley ,  Sylvain Charbonnel ,  Spencer Huhn

IPC分类号： F01N3/00 ,  F02M25/06 ,  F01N3/10 ,  F02D41/00 ,  F02D41/02 ,  F02B37/16 ,  F01N3/20 ,  F01N9/00 ,  F01N11/00 ,  F02M26/47 ,  F02M26/00 ,  F01N13/00

CPC分类号： F02D41/0055 ,  F01N3/2066 ,  F01N9/002 ,  F01N11/002 ,  F01N13/009 ,  F01N2610/02 ,  F01N2900/0408 ,  F01N2900/0412 ,  F01N2900/1404 ,  F02B37/16 ,  F02D41/0007 ,  F02D41/0245 ,  F02D41/027 ,  F02D41/029 ,  F02D2200/0802 ,  F02M26/47 ,  F02M2026/004 ,  Y02T10/144 ,  Y02T10/24 ,  Y02T10/26 ,  Y02T10/47

摘要： There is disclosed a method of regenerating at least one aftertreatment device in an exhaust system of an internal combustion engine by changing a calibration of the exhaust gas recirculation system with the engine to increase temperature of exhaust gas provided to the at least one aftertreatment device, and further incrementally changing the calibration to obtain an exhaust gas temperature within a target regeneration temperature range.

公开(公告)号：US09606023B2

公开(公告)日：2017-03-28

申请号：US13806407

申请日：2011-06-22

申请人： Frederic Peucat ,  Jean-Claude Habumuremyi ,  Joel Op De Beeck

发明人： Frederic Peucat ,  Jean-Claude Habumuremyi ,  Joel Op De Beeck

IPC分类号： G01M15/04 ,  F01N3/20 ,  F01N11/00

CPC分类号： G01M15/04 ,  F01N3/208 ,  F01N11/002 ,  F01N2610/1433 ,  F01N2610/144 ,  F01N2610/146 ,  F01N2900/0408 ,  F01N2900/0412 ,  F01N2900/1806 ,  F01N2900/1808 ,  Y02T10/24 ,  Y02T10/47

摘要： A method for detecting whether an injector with a valve controlled by a PWM signal of an SCR system is at least partially clogged, the system including a pump, or a positive-displacement pump, driven by a motor and pressure of which is controlled by a controller that continuously measures the pressure and/or another parameter characteristic of energy transmitted by the motor to the pump. According to the method, during normal operation of the SCR system, specific portions of one of the measurements are compared with equivalent portions stored in a memory.

公开(公告)号：US09581099B1

公开(公告)日：2017-02-28

申请号：US14828867

申请日：2015-08-18

申请人： FEV NORTH AMERICA, INC.

发明人： Tamas Szailer ,  Harsha Nanjundaswamy ,  Joel Deussen ,  Dean Tomazic

IPC分类号： F02D41/00 ,  F01N3/00 ,  F01N3/10 ,  F02D41/02 ,  F01N3/035 ,  F01N3/20 ,  F01N9/00 ,  F01N11/00 ,  F01N13/00

CPC分类号： F02D41/029 ,  F01N3/021 ,  F01N3/035 ,  F01N3/103 ,  F01N3/2066 ,  F01N9/002 ,  F01N11/00 ,  F01N11/007 ,  F01N13/008 ,  F01N2550/02 ,  F01N2550/04 ,  F01N2560/026 ,  F01N2560/14 ,  F01N2610/02 ,  F01N2900/0408 ,  F01N2900/1402 ,  F01N2900/1404 ,  F02D41/0235 ,  F02D41/024 ,  F02D41/1463 ,  F02D2041/228 ,  Y02T10/24 ,  Y02T10/47

摘要： An exhaust diagnostic system. The system includes a diesel engine having an exhaust system with a diesel particulate filter (DPF), a diesel oxidation catalyst (DOC), a selective catalytic reduction (SCR) catalyst, a first NOx sensor located upstream of the SCR catalyst and a second NOx sensor located downstream of the SCR catalyst. In addition, an engine control unit (ECU) is in electronic communication with the first NOx sensor and the second NOx sensor. An SCR coordinator can be included and be configured to execute a non-intrusive SCR deNOx efficiency test, an intrusive SCR/DOC deNOx efficiency test and an intrusive DOC non-methane hydrocarbon (NMHC) conversion efficiency test on the exhaust system. As a result of the conversion efficiency tests, a distinction can be made as to whether the SCR catalyst or DOC is failing.

摘要翻译： 排气诊断系统。 该系统包括具有排气系统的柴油发动机，其具有柴油机微粒过滤器（DPF），柴油机氧化催化剂（DOC），选择性催化还原（SCR）催化剂，位于SCR催化剂上游的第一NOx传感器和第二NOx 传感器位于SCR催化剂的下游。 此外，发动机控制单元（ECU）与第一NOx传感器和第二NOx传感器电子通信。 可以包括SCR协调器，并配置为执行非侵入式SCR脱硝效率测试，侵入性SCR / DOC脱硝效率测试和排气系统上的侵入式DOC非甲烷烃（NMHC）转换效率测试。 作为转换效率测试的结果，可以区分SCR催化剂或DOC是否失效。

公开(公告)号：US20170044949A1

公开(公告)日：2017-02-16

申请号：US14826678

申请日：2015-08-14

申请人： Cummins Emission Solutions Inc.

发明人： Nassim Khaled ,  Bryce R. Larson ,  Sarang S. Sonawane ,  Tushar H. Sharma

IPC分类号： F01N3/20 ,  F01N11/00 ,  F01N3/28

CPC分类号： F01N11/00 ,  F01N3/208 ,  F01N3/2896 ,  F01N2550/05 ,  F01N2610/02 ,  F01N2610/10 ,  F01N2610/105 ,  F01N2610/1406 ,  F01N2610/148 ,  F01N2900/0408 ,  F01N2900/1811 ,  F01N2900/1812 ,  F01N2900/1814 ,  G01F23/0061 ,  Y02A50/2325 ,  Y02T10/24 ,  Y02T10/47

摘要： An aftertreatment system comprises a reductant storage tank and a SCR system fluidly coupled thereto. A reductant physical level sensor and a tank temperature sensor are operatively coupled to the reductant storage tank. A controller is communicatively coupled with each of the sensors and configured to: interpret a first level output value from the physical level sensor and a first temperature output value from the tank temperature sensor. If the first level output value is below a first threshold, the controller determines if the first temperature output value is below a second threshold. If the first level output value is below the first threshold and the first temperature output value is below the second threshold, the controller determines a virtual reductant level in the reductant storage tank and indicates the virtual reductant level in lieu of a physical reductant level in the reductant storage tank to a user.

摘要翻译： 后处理系统包括还原剂储罐和与其流体耦合的SCR系统。 还原剂物理水平传感器和罐温度传感器可操作地耦合到还原剂储存罐。 控制器与每个传感器通信地耦合，并且被配置为：从物理水平传感器解释第一级输出值和来自罐温度传感器的第一温度输出值。 如果第一级输出值低于第一阈值，则控制器确定第一温度输出值是否低于第二阈值。 如果第一级输出值低于第一阈值并且第一温度输出值低于第二阈值，则控制器确定还原剂储存罐中的虚拟还原剂水平，并指示虚拟还原剂水平代替物理还原剂水平 还原剂储存罐给用户。

公开(公告)号：US20160363029A1

公开(公告)日：2016-12-15

申请号：US15177554

申请日：2016-06-09

申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA

发明人： Kenji SUZUKI ,  Shuntaro OKAZAKI ,  Hiroshi MIYAMOTO ,  Yasushi IWAZAKI ,  Toru KIDOKORO

IPC分类号： F01N9/00 ,  F01N3/08 ,  F02D41/02 ,  F01N3/10 ,  F01N11/00 ,  F02D41/14

CPC分类号： F01N9/00 ,  F01N3/0835 ,  F01N3/0842 ,  F01N3/0864 ,  F01N3/101 ,  F01N11/007 ,  F01N2430/06 ,  F01N2550/02 ,  F01N2560/02 ,  F01N2560/025 ,  F01N2560/14 ,  F01N2570/14 ,  F01N2570/16 ,  F01N2900/0402 ,  F01N2900/0408 ,  F02D41/0235 ,  F02D41/0295 ,  F02D41/1441 ,  F02D41/1454 ,  F02D41/1474 ,  F02D41/1495 ,  F02D41/2461 ,  F02D41/2474 ,  F02D2041/1422 ,  Y02T10/22 ,  Y02T10/47

摘要： An internal combustion engine comprises an upstream side air-fuel ratio sensor, a downstream side air-fuel ratio sensor, an air-fuel ratio control means, a learning means and an abnormality judging means. When the air-fuel ratio control means sets the target air-fuel ratio to a first side of a rich side or a lean side, if it is judged that the air-fuel ratio of the outflowing exhaust gas is maintained at a second side at an opposite side to the first side for a predetermined air-fuel ratio maintenance judgment time or more, the learning means corrects a parameter relating to the feedback control so that the air-fuel ratio of the inflowing exhaust gas changes to the first side. A correction amount of the parameter at the stuck learning is made small when the abnormality judging means judges that the downstream side air-fuel ratio sensor exhibits abnormal response delay.

摘要翻译： 内燃机包括上游侧空燃比传感器，下游侧空燃比传感器，空燃比控制装置，学习装置和异常判定装置。 当空燃比控制装置将目标空燃比设定为富侧或稀侧的第一侧时，如果判断为排出废气的空燃比维持在第二侧 为了预定的空燃比维护判断时间以上，与第一侧相反的一侧，学习装置校正与反馈控制有关的参数，使得流入的排气的空燃比向第一侧变化。 当异常判断装置判断出下游侧空燃比传感器呈现异常的响应延迟时，使卡入学习时的参数的校正量变小。

公开(公告)号：US09518492B2

公开(公告)日：2016-12-13

申请号：US12081894

申请日：2008-04-23

申请人： Mary Lou Kesse ,  Zhiyong Wei ,  Liangtao Zhu

发明人： Mary Lou Kesse ,  Zhiyong Wei ,  Liangtao Zhu

IPC分类号： F01N3/00 ,  F01N3/10 ,  F01N3/20

CPC分类号： F01N3/208 ,  F01N2560/026 ,  F01N2610/02 ,  F01N2900/0408 ,  F01N2900/0411 ,  F01N2900/0412 ,  Y02T10/24

摘要： An exhaust system for use with a combustion engine is disclosed. The exhaust system may have an exhaust passageway, a reduction catalyst, a reductant injector, and a controller. The controller may have a NOX/reductant relationship map, and be configured to receive a first input relating to an amount of NOX within the exhaust passageway upstream of the reduction catalyst, and reference the NOX/reductant relationship map to determine an initial amount of reductant that should be directed into the exhaust passageway based on the first input. The controller may also be configured to receive a second input relating to performance of the reduction catalyst, determine an adjustment to the initial amount of reductant based on the second input, and regulate operation of the reductant injector to direct an adjusted amount of reductant into the exhaust passageway. The controller may further be configured to update the NOX/reductant relationship map based on the determined adjustment.

摘要翻译： 公开了一种用于内燃机的排气系统。 排气系统可以具有排气通道，还原催化剂，还原剂喷射器和控制器。 控制器可以具有NOX /还原剂关系图，并且被配置为接收与还原催化剂上游的排气通道内的NOX量相关的第一输入，并引用NOX /还原剂关系图以确定还原剂的初始量 其应当基于第一输入引导到排气通道中。 控制器还可以被配置为接收与还原催化剂的性能相关的第二输入，基于第二输入确定对初始还原剂量的调节，并调节还原剂喷射器的操作以将调节量的还原剂引入 排气通道。 控制器还可以被配置为基于所确定的调整来更新NOX /还原剂关系图。