US Patent No: 5,272,871

Number of patents in Portfolio can not be more than 2000

Method and apparatus for reducing nitrogen oxides from internal combustion engine

7 Status Updates

Stats

ATTORNEY / AGENT: (SPONSORED)
 

Importance

Loading Importance Indicators... loading....

Abstract

Hydrogen gas from a hydrogen generator which creates hydrogen gas by the electrolysis of water or water vapor is supplied at the entrance to a catalyzer provided in an exhaust line. The catalyzer performs a catalytic reaction between hydrogen gas and nitrogen oxides to achieve decomposition into nitrogen gas and water vapor in the exhaust from an internal combustion engine. The nitrogen oxides are directly reduced with said hydrogen gas in a low temperature atmosphere not higher than 350.degree. C. to achieve efficient reduction in the nitrogen oxides. The improved method and apparatus provide a catalytic system with which the nitrogen oxides in the exhaust from a lean burnt engine or a diesel engine can be effectively reduced irrespective of the concentration of oxygen gas in the exhaust without impairing the good fuel economy of those engines.

Loading the Abstract Image... loading....

First Claim

Related Publications

Loading Related Publications... loading....

Patent Owner(s)

Patent OwnerAddressTotal Patents
KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHOAICHI-KEN847

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Abe, Katsushi Aichi-ken, JP 12 268
Fukui, Masayuki Kawasaki, JP 60 498
Kawahara, Kazuo Aichi-gun, JP 9 237
Muraki, Hideaki Aichi, JP 23 822
Oshima, Yujiro Nagoya, JP 18 591
Yokota, Koji Nagoya, JP 28 641

Cited Art

Patent Info (Count) # Cites Year
 
BIDWELL, HOWARD, A U.S. CITIZEN (1)
4,484,444 Apparatus and methods of amplifying engine emissions by which to increase the overall engine efficiency 4 1982

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
FORD GLOBAL TECHNOLOGIES, LLC (39)
6,843,051 Method and apparatus for controlling lean-burn engine to purge trap of stored NOx 0 2000
6,810,659 Method for determining emission control system operability 2 2000
6,708,483 Method and apparatus for controlling lean-burn engine based upon predicted performance impact 3 2000
6,629,453 Method and apparatus for measuring the performance of an emissions control device 3 2000
6,594,989 Method and apparatus for enhancing fuel economy of a lean burn internal combustion engine 30 2000
6,691,507 Closed-loop temperature control for an emission control device 11 2000
6,860,100 Degradation detection method for an engine having a NOx sensor 2 2001
6,694,244 Method for quantifying oxygen stored in a vehicle emission control device 5 2001
6,691,020 Method and system for optimizing purge of exhaust gas constituent stored in an emission control device 2 2001
6,650,991 Closed-loop method and system for purging a vehicle emission control 2 2001
6,615,577 Method and system for controlling a regeneration cycle of an emission control device 20 2001
6,604,504 Method and system for transitioning between lean and stoichiometric operation of a lean-burn engine 6 2001
6,553,754 Method and system for controlling an emission control device based on depletion of device storage capacity 13 2001
6,990,799 Method of determining emission control system operability 7 2001
7,168,239 Method and system for rapid heating of an emission control device 8 2002
7,111,450 Method for controlling the temperature of an emission control device 11 2002
7,032,572 Method for controlling an engine to obtain rapid catalyst heating 5 2002
6,925,982 Overall scheduling of a lean burn engine system 1 2002
6,868,827 Method for controlling transitions between operating modes of an engine for rapid heating of an emission control device 20 2002
6,769,398 Idle speed control for lean burn engine with variable-displacement-like characteristic 27 2002
6,758,185 Method to improve fuel economy in lean burn engines with variable-displacement-like characteristics 25 2002
6,745,747 Method for air-fuel ratio control of a lean burn engine 19 2002
6,735,938 Method to control transitions between modes of operation of an engine 44 2002
6,736,120 Method and system of adaptive learning for engine exhaust gas sensors 10 2002
6,736,121 Method for air-fuel ratio sensor diagnosis 48 2002
6,725,830 Method for split ignition timing for idle speed control of an engine 8 2002
6,715,462 Method to control fuel vapor purging 22 2002
6,568,177 Method for rapid catalyst heating 84 2002
6,779,337 Hydrogen fueled spark ignition engine 9 2002
6,895,747 Diesel aftertreatment systems 7 2002
6,862,879 Diesel aftertreatment system 7 2002
6,834,498 Diesel aftertreatment systems 4 2002
6,874,490 Method and system of adaptive learning for engine exhaust gas sensors 14 2004
6,955,155 Method for controlling transitions between operating modes of an engine for rapid heating of an emission control device 7 2004
7,059,112 Degradation detection method for an engine having a NOx sensor 10 2004
7,047,932 Method to improve fuel economy in lean burn engines with variable-displacement-like characteristics 3 2004
7,069,903 Idle speed control for lean burn engine with variable-displacement-like characteristic 8 2004
7,059,114 Hydrogen fueled spark ignition engine 0 2004
7,000,383 Diesel aftertreatment systems 8 2004
 
FORD GLOBAL TECHNOLOGIES, INC. (27)
6,272,849 Apparatus and method for heating an automotive catalyst to an emission reactive condition 5 2000
6,269,633 Emission control system 49 2000
6,539,704 Method for improved vehicle performance 4 2000
6,499,293 Method and system for reducing NOx tailpipe emissions of a lean-burn internal combustion engine 9 2000
6,487,849 Method and apparatus for controlling lean-burn engine based upon predicted performance impact and trap efficiency 13 2000
6,487,850 Method for improved engine control 9 2000
6,481,199 Control for improved vehicle performance 10 2000
6,477,832 Method for improved performance of a vehicle having an internal combustion engine 13 2000
6,438,944 Method and apparatus for optimizing purge fuel for purging emissions control device 9 2000
6,434,930 Method and apparatus for controlling lean operation of an internal combustion engine 2 2000
6,427,437 Method for improved performance of an engine emission control system 6 2000
6,374,597 Method and apparatus for accessing ability of lean NOx trap to store exhaust gas constituent 13 2000
6,360,530 Method and apparatus for measuring lean-burn engine emissions 7 2000
6,327,847 Method for improved performance of a vehicle 13 2000
6,308,515 Method and apparatus for accessing ability of lean NOx trap to store exhaust gas constituent 15 2000
6,308,697 Method for improved air-fuel ratio control in engines 10 2000
6,427,439 Method and system for NOx reduction 43 2000
6,389,803 Emission control for improved vehicle performance 7 2000
6,546,718 Method and system for reducing vehicle emissions using a sensor downstream of an emission control device 5 2001
6,539,706 Method and system for preconditioning an emission control device for operation about stoichiometry 1 2001
6,502,387 Method and system for controlling storage and release of exhaust gas constituents in an emission control device 11 2001
6,490,860 Open-loop method and system for controlling the storage and release cycles of an emission control device 7 2001
6,487,853 Method and system for reducing lean-burn vehicle emissions using a downstream reductant sensor 7 2001
6,467,259 Method and system for operating dual-exhaust engine 44 2001
6,463,733 Method and system for optimizing open-loop fill and purge times for an emission control device 32 2001
6,453,666 Method and system for reducing vehicle tailpipe emissions when operating lean 3 2001
6,490,856 Control for improved vehicle performance 8 2002
 
ARVIN TECHNOLOGIES, INC. (12)
6,651,597 Plasmatron having an air jacket and method for operating the same 7 2002
7,021,048 Combination emission abatement assembly and method of operating the same 11 2002
7,014,930 Apparatus and method for operating a fuel reformer to generate multiple reformate gases 6 2002
6,976,353 Apparatus and method for operating a fuel reformer to provide reformate gas to both a fuel cell and an emission abatement device 14 2002
6,758,035 Method and apparatus for purging SOX from a NOX trap 12 2002
6,702,991 Apparatus and method for reducing power consumption of a plasma fuel reformer 8 2002
6,715,452 Method and apparatus for shutting down a fuel reformer 10 2002
6,903,259 Thermoelectric device for use with fuel reformer and associated method 6 2002
6,851,398 Method and apparatus for controlling a fuel reformer by use of existing vehicle control signals 20 2003
6,959,542 Apparatus and method for operating a fuel reformer to regenerate a DPNR device 14 2003
7,285,247 Apparatus and method for operating a fuel reformer so as to purge soot therefrom 2 2003
7,244,281 Method and apparatus for trapping and purging soot from a fuel reformer 3 2003
 
HNO GREENFUELS, INC. (6)
8,454,808 Hydrogen supplemental system for on-demand hydrogen generation for internal combustion engines 0 2011
8,449,733 Hydrogen supplemental system for on-demand hydrogen generation for internal combustion engines 0 2011
8,449,734 Hydrogen supplemental system for on-demand hydrogen generation for internal combustion engines 0 2011
8,449,735 Hydrogen supplemental system for on-demand hydrogen generation for internal combustion engines 0 2011
8,449,736 Hydrogen supplemental system for on-demand hydrogen generation for internal combustion engines 0 2011
8,449,754 Hydrogen supplemental system for on-demand hydrogen generation for internal combustion engines 0 2011
 
NISSAN MOTOR CO., LTD. (6)
6,276,132 Exhaust gas purifying system 24 2000
6,823,662 Exhaust gas purifying system 20 2000
6,557,342 Exhaust gas purifying system 13 2001
6,845,610 Exhaust gas purification apparatus and method 18 2001
6,708,484 Exhaust gas purifying system 15 2002
6,729,125 Exhaust gas purifying system 19 2002
 
DELPHI TECHNOLOGIES, INC. (5)
6,758,036 Method for sulfur protection of NOx adsorber 17 2000
6,655,130 System and controls for near zero cold start tailpipe emissions in internal combustion engines 27 2000
6,832,473 Method and system for regenerating NOx adsorbers and/or particulate filters 54 2002
7,093,428 Exhaust system and method of thermal management 22 2004
7,435,275 System and method of heating an exhaust treatment device 2 2005
 
TOYOTA JIDOSHA KABUSHIKI KAISHA (5)
5,412,946 NOx decreasing apparatus for an internal combustion engine 149 1992
6,959,540 Exhaust gas purification device of internal combustion engine 11 2004
7,272,924 Exhaust gas purification device of internal combustion engine 7 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
 
LYNNTECH POWER SYSTEMS, LTD. (4)
6,036,827 Electrolyzer 19 1997
5,964,089 Diagnostics and control of an on board hydrogen generation and delivery system 43 1997
6,122,909 Catalytic reduction of emissions from internal combustion engines 85 1998
6,698,389 Electrolyzer for internal combustion engine 15 2002
 
Donaldson Company, Inc. (3)
7,257,942 Apparatus for emissions control, systems, and methods 3 2003
7,278,259 Apparatus for emissions control, system, and methods 5 2003
7,607,289 Apparatus for emissions control, systems, and methods 2 2007
 
ROBERT BOSCH GMBH (3)
6,041,594 Mixture delivery device for internal combustion engines 36 1998
7,594,393 Apparatus for introducing a reducing agent into the exhaust of an internal combustion engine 7 2004
7,975,472 Exhaust gas system for an internal combustion engine 0 2007
 
SOUTHWEST RESEARCH INSTITUTE (3)
6,293,096 Multiple stage aftertreatment system 50 1999
6,615,580 Integrated system for controlling diesel engine emissions 32 2001
6,718,757 Integrated method for controlling diesel engine emissions in CRT-LNT system 24 2003
 
BAYERISCHE MOTOREN WERKE AKTIENGESELLSCHAFT (2)
6,931,841 Process for the catalytic exhaust gas aftertreatment of engine combustion emissions 0 2002
7,003,946 Process for the catalytic exhaust gas aftertreatment of engine combustion emissions 2 2004
 
HONDA GIKEN KOGYO KABUSHIKI KAISHA (2)
6,543,216 Heating device for external combustion engine 2 2002
7,485,160 Hydrogen generating apparatus, hydrogen generating system and use thereof 1 2003
 
INSTITUT FRANCAIS DU PETROLE (2)
6,327,851 Process for controlled injection of hydrocarbons into an exhaust line of an internal-combustion engine 5 1999
6,508,057 Process and device intended for nitrogen oxides elimination in an exhaust line of an internal-combustion engine 25 1999
 
KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO (2)
5,474,745 Catalytic converter for purifying exhaust gas 7 1994
5,543,124 Process for reducing nitrogen oxides 33 1994
 
LYNNTECH, INC. (2)
6,427,639 Method and apparatus for warming intake air to an internal combustion engine 16 1998
RE39720 Catalytic reduction of emissions from internal combustion engines 2 2001
 
MASSACHUSETTS INSTITUTE OF TECHNOLOGY (2)
6,560,958 Emission abatement system 57 1999
6,718,753 Emission abatement system utilizing particulate traps 18 2002
 
NUCELLSYS GMBH (2)
7,152,394 System and method for reducing nitrogen oxides in the exhaust of an internal combustion engine 1 2002
7,051,518 Internal combustion engine fuel supply system 2 2005
 
The Texas A&M University System (2)
5,813,222 Method and apparatus for heating a catalytic converter to reduce emissions 41 1994
5,953,908 Method and apparatus for heating a catalytic converter to reduce emissions 18 1997
 
CHRYSLER GROUP LLC (1)
6,236,930 Sensor output precision enhancement in an automotive control system 0 1999
 
COLLIER TECHNOLOGIES, LLC (1)
6,739,125 Internal combustion engine with SCR and integrated ammonia production 50 2002
 
DAIMLER AG (1)
8,181,445 Device and method for exhaust gas aftertreatment 0 2004
 
DR. FRIEDRICH WIRBELEIT (1)
5,921,076 Process and apparatus for reducing nitrogen oxides in engine emissions 64 1997
 
ET US HOLDINGS LLC (1)
7,776,280 Method and apparatus for selective catalytic reduction of NOx 2 2005
 
GM GLOBAL TECHNOLOGY OPERATIONS, INC. (1)
6,981,367 Hydrogen and oxygen generation from a water vapor containing exhaust 4 2003
 
MITSUBISHI DENKI KABUSHIKI KAISHA (1)
6,755,017 Device for purifying exhaust gas of an internal combustion engine 6 2001
 
MITSUBISHI HEAVY INDUSTRIES, LTD. (1)
8,281,577 Exhaust gas purification system and exhaust gas purification method 0 2008
 
NELSON BURGESS LIMITED (1)
6,722,124 Catalytic converter 22 2002
 
NORSK HYDRO ASA (1)
7,288,135 Solid multicomponent mixed proton and electron conducting membrane 1 2002
 
SHELL OIL COMPANY (1)
7,601,316 Method of reducing NOx and particulates from internal combustion engines 0 2003
 
TOKYO ROKI CO., LTD. (1)
7,562,521 SCR muffler 0 2005
 
UMICORE AG & CO. KG (1)
7,767,163 Exhaust treatment devices 2 2004
 
Other [Check patent profile for assignment information] (4)
7,249,598 Hydrogen augmented diesel crankcase ventilation 3 2006
7,571,719 Hydrogen augmented diesel crankcase ventilation 0 2007
8,163,142 Hydrogen system for internal combustion engine 0 2009
8,464,667 Hydrogen system for internal combustion engine 0 2010