US Patent No: 5,845,487

Number of patents in Portfolio can not be more than 2000

Method and device for operating an internal combustion engine with low nitrogen oxide emissions

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Abstract

A method and an apparatus for operating an internal combustion engine, in particular a motor-vehicle diesel engine, with low nitrogen-oxide emissions, has a first mode of operation which sets an early start of fuel injection and a nitrogen-oxide reducing agent is added to the stream of exhaust gases upstream of a nitrogen-oxide-reducing exhaust-gas catalytic converter, and a second mode of operation which sets a late start of fuel injection. A temperature sensor measures the temperature of the exhaust-gas catalytic converter. The engine is operated in the second mode of operation when the measured temperature of the exhaust-gas catalytic converter lies outside a prescribable temperature range for an effective catalytic nitrogen-oxide reduction to ensure low nitrogen-oxide emissions.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
DAIMLERCHRYSLER AGSTUTTGART1719

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fraenkle, Gerhard Remshalden, DE 5 83
Marquartdt, Klaus-Juergen Remshalden, DE 1 61

Cited Art

Patent Info (Count) # Cites Year
 
TOYOTA JIDOSHA KABUSHIKI KAISHA (3)
5,211,010 Exhaust gas purification system for a diesel engine 22 1991
5,201,802 Exhaust gas purification system for an internal combustion engine 125 1992
5,713,199 Device for detecting deterioration of NO.sub.x absorbent 97 1996
 
CATERPILLAR INC. (1)
5,709,080 Leak detection method and apparatus for an exhaust purification system 17 1996
 
FUJI JUKOGYO KABUSHIKI KAISHA (1)
5,050,551 System for controlling ignition timing and fuel injection timing of a two-cycle engine 37 1990
 
MAZDA MOTOR CORPORATION (1)
5,501,074 Exhaust gas purifying system 12 1994

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
FORD GLOBAL TECHNOLOGIES, INC. (11)
6,305,160 Emission control system 23 1999
6,295,809 Emission control system with a catalyst 22 1999
6,470,673 Control of a NOX reductant delivery system 29 2000
6,269,633 Emission control system 49 2000
6,427,439 Method and system for NOx reduction 42 2000
6,408,616 Diesel OBD-II system for detection of degradation of catalyst activity 14 2000
6,363,713 On-board diagnostics for detecting the operation of diesel emissions control system 4 2000
6,293,093 Method and system for directly monitoring the efficiency of a conditioning catalyst having negligible oxygen storage capacity 2 2000
6,532,736 Emission control system with a catalyst 16 2001
6,546,720 Method and apparatus for controlling the amount of reactant to be added to a substance using a sensor which is responsive to both the reactant and the substance 36 2001
6,487,852 Method and apparatus for controlling reactant injection into an active lean NOx catalyst 23 2001
 
FORD GLOBAL TECHNOLOGIES, LLC (10)
6,928,359 High efficiency conversion of nitrogen oxides in an exhaust aftertreatment device at low temperature 11 2001
6,742,326 High efficiency conversion of nitrogen oxides in an exhaust aftertreatment device at low temperature 18 2001
6,698,191 High efficiency conversion of nitrogen oxides in an exhaust aftertreatment device at low temperature 12 2001
6,421,599 Control strategy for an internal combustion engine in a hybrid vehicle 30 2001
7,121,085 Method and apparatus for controlling hydrocarbon injection into engine exhaust to reduce NOx 2 2001
7,110,904 Control strategy for an internal combustion engine in a hybrid vehicle 12 2002
6,895,747 Diesel aftertreatment systems 6 2002
6,862,879 Diesel aftertreatment system 7 2002
6,834,498 Diesel aftertreatment systems 4 2002
7,000,383 Diesel aftertreatment systems 8 2004
 
TOYOTA JIDOSHA KABUSHIKI KAISHA (7)
6,581,373 Vehicle with reduced emission of harmful component 6 2001
6,595,307 Hybrid vehicle capable of reducing NOx emissions and method of operating same 9 2001
6,698,188 Emission control apparatus of internal combustion engine 15 2001
6,959,540 Exhaust gas purification device of internal combustion engine 11 2004
7,272,924 Exhaust gas purification device of internal combustion engine 6 2005
7,086,222 Exhaust gas purification device of internal combustion engine 7 2005
7,086,223 Exhaust gas purification device of internal combustion engine 6 2005
 
ENGELHARD CORPORATION (4)
6,311,484 System for reducing NOx transient emission 34 2000
6,446,430 System for reducing NOx transient emission 35 2001
6,662,553 Control system for mobile NOx SCR applications 30 2002
7,150,145 Control system for mobile NOx SCR applications 27 2003
 
SIEMENS AKTIENGESELLSCHAFT (3)
6,209,313 Method of reducing the Nox content in the exhaust gas of a diesel internal combustion engine 17 1998
6,247,303 Method and device for removing oxidic noxious substances in an oxygen-containing exhaust gas and engine which is operated therewith 14 1999
6,470,676 Method for the catalytic conversion of nitrogen oxides contained in the exhaust gas of an internal combustion engine 7 2001
 
TNO AUTOMOTIVE (3)
6,415,602 Control system for mobile NOx SCR applications 64 2000
6,742,330 Method for determining catalyst cool down temperature 52 2002
6,581,374 Control system for mobile NOx SCR applications 20 2002
 
EXTENGINE SYSTEMS, INC. (2)
7,065,958 Emission control system 39 2003
7,497,076 Emission control system 3 2005
 
GM GLOBAL TECHNOLOGY OPERATIONS LLC (2)
7,178,328 System for controlling the urea supply to SCR catalysts 40 2004
7,426,825 Method and apparatus for urea injection in an exhaust aftertreatment system 5 2006
 
VOLKSWAGEN AG (2)
6,408,615 Method for controlling an NOx accumulating catalytic converter 7 2000
6,499,291 Apparatus and method for monitoring NOx storage catalytic converters 12 2001
 
CATERPILLAR INC. (1)
6,761,025 Enhanced ammonia feed control for selective catalytic reduction 15 2002
 
CHRYSLER GROUP LLC (1)
6,357,226 Control system for lean air-fuel ratio NOx catalyst system 22 1998
 
CONTINENTAL AUTOMOTIVE GMBH (1)
7,380,983 Method and device for checking temperature values of a temperature sensor of an internal combustion engine 2 2005
 
EXTENGINE TRANSPORT SYSTEMS, INC. (1)
7,644,579 Emission control system 1 2006
 
FLEETGUARD, INC. (1)
6,922,987 System and method for enhancing internal combustion engine aftertreatment applications by superheated fuel injection 3 2003
 
FORD MOTOR COMPANY (1)
6,449,945 Emission control system 10 2001
 
GENERAL ELECTRIC COMPANY (1)
7,736,608 Methods and systems for reducing the emissions from combustion gases 1 2007
 
HALDOR TOPSOE A/S (1)
6,550,250 Process for the reduction of SCR NOx emissions and apparatus therefor 9 2002
 
HONDA MOTOR CO., LTD. (1)
7,204,081 Exhaust gas purifying apparatus and method for internal combustion engine, and engine control unit 13 2003
 
INSTITUT FRANCAIS DU PETROLE (1)
6,508,057 Process and device intended for nitrogen oxides elimination in an exhaust line of an internal-combustion engine 25 1999
 
JOHNSON MATTHEY CATALYSTS (GERMANY) GMBH (1)
6,209,315 Method and device for exhaust gas after-treatment in an internal combustion engine equipped with an SCR catalyst 38 1999
 
JOHNSON MATTHEY PUBLIC LIMITED COMPANY (1)
7,861,516 Methods of controlling reductant addition 4 2004
 
MACK TRUCKS, INC. (1)
8,240,134 Engine with exhaust cooling and method 0 2006
 
MITSUBISHI FUSO TRUCK AND BUS CORPORATION (1)
6,935,104 Engine control system 3 2003
 
NISSAN DIESEL MOTOR CO., LTD. (1)
7,685,810 Engine control apparatus and engine operating method 8 2004
 
PERKINS ENGINES COMPANY LIMITED (1)
7,886,528 System for controlling exhaust aftertreatment 0 2008
 
TENNECO AUTOMOTIVE OPERATING COMPANY INC. (1)
6,941,746 Mobile diesel selective catalytic reduction systems and methods 16 2003