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F01N2900/0412

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FMECHANICAL ENGINEERING LIGHTING HEATING WEAPONS BLASTING ENGINES OR PUMPS F01Engines F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES F01N2900/00Details of electrical control or of the monitoring of the exhaust gas treating apparatus

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F01N2900/0412using pre-calibrated maps, tables or charts

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Patents Grantslast 30 patents

Information Patent Grant
Systems and methods for determining amount of reductant deposits in...
- Patent number 12,152,522
- Issue date Nov 26, 2024
- Cummins Emission Solutions Inc.
- Anurag Kumra
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Method for calculating reaction heat in an exhaust system
- Patent number 12,104,511
- Issue date Oct 1, 2024
- Robert Bosch GmbH
- Elke Baeder
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Systems and methods for forecasting aftertreatment temperatures ove...
- Patent number 12,037,955
- Issue date Jul 16, 2024
- Cummins Inc.
- Thomas R. Nelson
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
System and method for in-cylinder dosing (ICD) for an engine
- Patent number 11,982,244
- Issue date May 14, 2024
- Caterpillar Inc.
- Michael Edward Sattler
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Device and method in connection with a pre-heating process of an af...
- Patent number 11,976,603
- Issue date May 7, 2024
- Volvo Truck Corporation
- Martin Wilhelmsson
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Method and device for inspecting and safeguarding a functionality o...
- Patent number 11,885,248
- Issue date Jan 30, 2024
- Vitesco Technologies GmbH
- Dietmar Ellmer
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Method, computing unit, and computer program for operating an inter...
- Patent number 11,879,406
- Issue date Jan 23, 2024
- Robert Bosch GmbH
- Michael Fey
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Exhaust after-treatment in heavy-duty motor vehicles
- Patent number 11,879,375
- Issue date Jan 23, 2024
- PACCAR Inc.
- Cynthia Chaffin Webb
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Hybrid electric vehicle and catalyst heating control method therefor
- Patent number 11,851,047
- Issue date Dec 26, 2023
- Hyundai Motor Company
- Jea Mun Lee
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Detecting reductant quality using a virtual sensor
- Patent number 11,781,464
- Issue date Oct 10, 2023
- Caterpillar Inc.
- Frank Lombardi
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Controlling operation of an engine based on emissions monitoring
- Patent number 11,773,798
- Issue date Oct 3, 2023
- Caterpillar Inc.
- Sylvain J. Charbonnel
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Exhaust gas purification device for internal combustion engine, and...
- Patent number 11,761,364
- Issue date Sep 19, 2023
- Isuzo Motors Limited
- Akihiro Sawada
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Apparatus and method for controlling a vehicle action
- Patent number 11,753,977
- Issue date Sep 12, 2023
- Jaguar Land Rover Limited
- Bhanuprakash Haranahalli Panchakshari
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Systems and methods for air-fuel ratio imbalance monitor
- Patent number 11,725,603
- Issue date Aug 15, 2023
- Ford Global Technologies, LLC
- Michael Uhrich
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Method of generating vehicle control data, vehicle control device,...
- Patent number 11,673,556
- Issue date Jun 13, 2023
- Toyota Jidosha Kabushiki Kaisha
- Yohsuke Hashimoto
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Flash boiling injection control
- Patent number 11,668,220
- Issue date Jun 6, 2023
- Faurecia Emissions Control Technologies, USA, LLC
- Edward Kinnaird
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Method to control a burner for an exhaust system of an internal com...
- Patent number 11,649,754
- Issue date May 16, 2023
- Marelli Europe S.p.A.
- Matteo De Cesare
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Method and system for determining internal temperature of a mid-bri...
- Patent number 11,542,849
- Issue date Jan 3, 2023
- Caterpillar Inc.
- Sylvain J. Charbonnel
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Method for analysing the operation of an anti-pollution system for...
- Patent number 11,525,382
- Issue date Dec 13, 2022
- Continental Automotive France
- Jean-Luc Boyer
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Heater diagnostics in heavy-duty motor vehicle engines
- Patent number 11,428,136
- Issue date Aug 30, 2022
- PACCAR Inc.
- Charles Wayne Reinhardt Swart
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Deceleration cylinder cut-off
- Patent number 11,352,966
- Issue date Jun 7, 2022
- Tula Technology, Inc.
- Steven E. Carlson
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Grant
Systems and methods for increasing reductant insertion accuracy
- Patent number 11,306,639
- Issue date Apr 19, 2022
- Cummins Emission Solutions Inc.
- Vikram Sundararajan
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Dynamic valve control in a skip fire controlled engine
- Patent number 11,261,807
- Issue date Mar 1, 2022
- Tula Technology, Inc.
- Jerry F. Fuschetto
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Dual UHEGO control of particulate filter regeneration
- Patent number 11,255,280
- Issue date Feb 22, 2022
- DENSO International America, Inc.
- Edward Szczepanski
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Selective catalytic reduction system
- Patent number 11,105,236
- Issue date Aug 31, 2021
- Perkins Engine Company Limited
- Leo Shead
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Method and system for leak detection at a particulate filter
- Patent number 11,041,423
- Issue date Jun 22, 2021
- Ford Global Technologies, LLC
- Eric Beatham
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Fuel heating
- Patent number 10,920,707
- Issue date Feb 16, 2021
- McLaren Automotive Limited
- Luca Stronati
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Grant
Engine diagnostics during cylinder cut off operation
- Patent number 10,900,425
- Issue date Jan 26, 2021
- Tula Technology, Inc.
- Xin Yuan
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Method and apparatus for controlling reductant injection into an ex...
- Patent number 10,883,404
- Issue date Jan 5, 2021
- GM Global Technology Operations LLC
- Francesco Laviola
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
NH3 slip detection using NOx sensor
- Patent number 10,871,097
- Issue date Dec 22, 2020
- Cummins Emission Solutions Inc.
- Jinqian Gong
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL

Patents Applicationslast 30 patents

Information Patent Application
SYSTEMS AND METHODS FOR FORECASTING AFTERTREATMENT TEMPERATURES OVE...
- Publication number 20240337225
- Publication date Oct 10, 2024
- Cummins Inc.
- Thomas R. Nelson
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
VEHICLE EMISSIONS MANAGEMENT
- Publication number 20240254909
- Publication date Aug 1, 2024
- Cummins Inc.
- Kartavya Neema
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
EXHAUST AFTER-TREATMENT IN HEAVY-DUTY MOTOR VEHICLES
- Publication number 20240200481
- Publication date Jun 20, 2024
- PACCAR Inc
- Cynthia Chaffin Webb
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
ADJUSTING THERMAL MANAGEMENT MODE ENTRY AND EXIT TEMPERATURE THRESH...
- Publication number 20240026808
- Publication date Jan 25, 2024
- Cummins Inc.
- Kristopher R. Bare
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
FLASH BOILING INJECTION CONTROL
- Publication number 20230033617
- Publication date Feb 2, 2023
- Faurecia Emissions Control Technologies, USA, LLC
- Edward Kinnaird
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
Method to Control a Burner for an Exhaust System of an Internal Com...
- Publication number 20230003155
- Publication date Jan 5, 2023
- MARELLI EUROPE S.p.A.
- Matteo De Cesare
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
APPARATUS AND METHOD FOR GASEOUS EMISSIONS TREATMENT WITH RESISTIVE...
- Publication number 20220082042
- Publication date Mar 17, 2022
- ADVANCED TECHNOLOGY EMISSION SOLUTIONS INC.
- Robin Crawford
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
Method and Device for Inspecting and Safeguarding a Functionality o...
- Publication number 20220025808
- Publication date Jan 27, 2022
- Vitesco Technologies GMBH
- Dietmar Ellmer
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
DYNAMIC VALVE CONTROL IN A SKIP FIRE CONTROLLED ENGINE
- Publication number 20210199061
- Publication date Jul 1, 2021
- TULA TECHNOLOGY, INC.
- Jerry F. FUSCHETTO
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
DECELERATION CYLINDER CUT-OFF
- Publication number 20210040904
- Publication date Feb 11, 2021
- TULA TECHNOLOGY, INC.
- Steven E. Carlson
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
METHOD AND APPARATUS FOR CONTROLLING REDUCTANT INJECTION INTO AN EX...
- Publication number 20200256231
- Publication date Aug 13, 2020
- GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Francesco LAVIOLA
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
METHOD FOR ANALYSING THE OPERATION OF AN ANTI-POLLUTION SYSTEM FOR...
- Publication number 20200208560
- Publication date Jul 2, 2020
- CONTINENTAL AUTOMOTIVE FRANCE
- Jean-luc BOYER
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
METHOD AND SYSTEM FOR CONTROL OF AT LEAST ONE OF A DOSAGE DEVICE AN...
- Publication number 20200049047
- Publication date Feb 13, 2020
- SCANIA CV AB
- Henrik BIRGERSSON
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
ENGINE CONTROL IN FUEL AND/OR CYLINDER CUT OFF MODES BASED ON INTAK...
- Publication number 20190323441
- Publication date Oct 24, 2019
- TULA TECHNOLOGY, INC.
- Xin YUAN
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
An Improved Selective Catalytic Reduction System
- Publication number 20190316503
- Publication date Oct 17, 2019
- PERKINS ENGINES COMPANY LIMITED
- Leo Shead
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
STOP VALVE, SCR SYSTEM, AND METHOD FOR DETECTING LEAKS AND/OR IDENT...
- Publication number 20190170047
- Publication date Jun 6, 2019
- ROBERT BOSCH GmbH
- Okke VENEKAMP
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
AFTERTREATMENT REGENERATION WITH VARIABLE TIME AND TEMPERATURE
- Publication number 20190010845
- Publication date Jan 10, 2019
- Cummins Inc.
- Salil H. Marathe
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
METHOD AND SYSTEM FOR CATALYST FEEDBACK CONTROL
- Publication number 20180094563
- Publication date Apr 5, 2018
- FORD GLOBAL TECHNOLOGIES, L.L.C.
- Stephen William Magner
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
METHOD AND SYSTEM FOR EXHAUST AFTERTREATMENT
- Publication number 20180023450
- Publication date Jan 25, 2018
- FORD GLOBAL TECHNOLOGIES, L.L.C.
- Xiaogang Zhang
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
REDUCTANT APPORTIONMENT FOR MULTI-DOSING ARCHITECTURES
- Publication number 20170191393
- Publication date Jul 6, 2017
- Cummins Emission Solutions Inc.
- Royce V. Koshy
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
USE OF PRESSURE DIFFERENTIAL IN SELECTIVE CATALYTIC REDUCTION SYSTEMS
- Publication number 20170152785
- Publication date Jun 1, 2017
- Cummins Emission Solutions Inc.
- Jaime A. Lugo-Castillo
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
METHOD FOR THE REGENERATION OF A PARTICLE FILTER, AND INTERNAL COMB...
- Publication number 20170030242
- Publication date Feb 2, 2017
- MAN TRUCK & BUS AG
- Markus KNAUER
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
EXHAUST PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE
- Publication number 20160265411
- Publication date Sep 15, 2016
- Toyota Jidosha Kabushiki Kaisha
- Yoshihisa TSUKAMOTO
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
METHOD FOR REDUCING EXHAUST GAS EMISSIONS DURING A TRANSIENT TRANSI...
- Publication number 20160221566
- Publication date Aug 4, 2016
- ROBERT BOSCH GmbH
- Sebastian Lachenmaier
- B60 - VEHICLES IN GENERAL
Information Patent Application
METHOD OF OPERATING AN ENGINE
- Publication number 20160160785
- Publication date Jun 9, 2016
- Caterpillar Inc.
- Amiyo K. Basu
- G01 - MEASURING TESTING
Information Patent Application
METHOD FOR MONITORING UREA QUALITY OF AN SCR SYSTEM
- Publication number 20150354429
- Publication date Dec 10, 2015
- Inergy Automotive Systems Research (Societe Anonyme)
- James Edward THOMPSON
- G01 - MEASURING TESTING
Information Patent Application
LEAK DETECTION AND MITIGATION IN REDUCTANT DELIVERY SYSTEMS
- Publication number 20150113960
- Publication date Apr 30, 2015
- Cummins Inc.
- Michael J. Ruth
- G01 - MEASURING TESTING
Information Patent Application
ENHANCED DIAGNOSTIC SIGNAL TO DETECT PRESSURE CONDITION OF A PARTIC...
- Publication number 20140366515
- Publication date Dec 18, 2014
- Janean E. Kowalkowski
- G01 - MEASURING TESTING
Information Patent Application
ADAPTIVE SOOT MASS ESTIMATION IN A VEHICLE EXHAUST AFTER-TREATMENT...
- Publication number 20140338434
- Publication date Nov 20, 2014
- GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Min Sun
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
EXHAUST GAS PURIFICATION SYSTEM AND EXHAUST GAS PURIFICATION METHOD
- Publication number 20140341781
- Publication date Nov 20, 2014
- Daiji Nagaoka
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL

using pre-calibrated maps, tables or charts

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

Systems and methods for determining amount of reductant deposits in...

Method for calculating reaction heat in an exhaust system

Systems and methods for forecasting aftertreatment temperatures ove...

System and method for in-cylinder dosing (ICD) for an engine

Device and method in connection with a pre-heating process of an af...

Method and device for inspecting and safeguarding a functionality o...

Method, computing unit, and computer program for operating an inter...

Exhaust after-treatment in heavy-duty motor vehicles

Hybrid electric vehicle and catalyst heating control method therefor

Detecting reductant quality using a virtual sensor

Controlling operation of an engine based on emissions monitoring

Exhaust gas purification device for internal combustion engine, and...

Apparatus and method for controlling a vehicle action

Systems and methods for air-fuel ratio imbalance monitor

Method of generating vehicle control data, vehicle control device,...

Flash boiling injection control

Method to control a burner for an exhaust system of an internal com...

Method and system for determining internal temperature of a mid-bri...

Method for analysing the operation of an anti-pollution system for...

Heater diagnostics in heavy-duty motor vehicle engines

Deceleration cylinder cut-off

Systems and methods for increasing reductant insertion accuracy

Dynamic valve control in a skip fire controlled engine

Dual UHEGO control of particulate filter regeneration

Selective catalytic reduction system

Method and system for leak detection at a particulate filter

Fuel heating

Engine diagnostics during cylinder cut off operation

Method and apparatus for controlling reductant injection into an ex...

NH3 slip detection using NOx sensor

Patents Applicationslast 30 patents

SYSTEMS AND METHODS FOR FORECASTING AFTERTREATMENT TEMPERATURES OVE...

VEHICLE EMISSIONS MANAGEMENT

EXHAUST AFTER-TREATMENT IN HEAVY-DUTY MOTOR VEHICLES

ADJUSTING THERMAL MANAGEMENT MODE ENTRY AND EXIT TEMPERATURE THRESH...

FLASH BOILING INJECTION CONTROL

Method to Control a Burner for an Exhaust System of an Internal Com...

APPARATUS AND METHOD FOR GASEOUS EMISSIONS TREATMENT WITH RESISTIVE...

Method and Device for Inspecting and Safeguarding a Functionality o...

DYNAMIC VALVE CONTROL IN A SKIP FIRE CONTROLLED ENGINE

DECELERATION CYLINDER CUT-OFF

METHOD AND APPARATUS FOR CONTROLLING REDUCTANT INJECTION INTO AN EX...

METHOD FOR ANALYSING THE OPERATION OF AN ANTI-POLLUTION SYSTEM FOR...

METHOD AND SYSTEM FOR CONTROL OF AT LEAST ONE OF A DOSAGE DEVICE AN...

ENGINE CONTROL IN FUEL AND/OR CYLINDER CUT OFF MODES BASED ON INTAK...

An Improved Selective Catalytic Reduction System

STOP VALVE, SCR SYSTEM, AND METHOD FOR DETECTING LEAKS AND/OR IDENT...

AFTERTREATMENT REGENERATION WITH VARIABLE TIME AND TEMPERATURE

METHOD AND SYSTEM FOR CATALYST FEEDBACK CONTROL

METHOD AND SYSTEM FOR EXHAUST AFTERTREATMENT

REDUCTANT APPORTIONMENT FOR MULTI-DOSING ARCHITECTURES

USE OF PRESSURE DIFFERENTIAL IN SELECTIVE CATALYTIC REDUCTION SYSTEMS

METHOD FOR THE REGENERATION OF A PARTICLE FILTER, AND INTERNAL COMB...

EXHAUST PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE

METHOD FOR REDUCING EXHAUST GAS EMISSIONS DURING A TRANSIENT TRANSI...

METHOD OF OPERATING AN ENGINE

METHOD FOR MONITORING UREA QUALITY OF AN SCR SYSTEM

LEAK DETECTION AND MITIGATION IN REDUCTANT DELIVERY SYSTEMS

ENHANCED DIAGNOSTIC SIGNAL TO DETECT PRESSURE CONDITION OF A PARTIC...

ADAPTIVE SOOT MASS ESTIMATION IN A VEHICLE EXHAUST AFTER-TREATMENT...

EXHAUST GAS PURIFICATION SYSTEM AND EXHAUST GAS PURIFICATION METHOD