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Class Information
Number: 123/691
Name: Internal-combustion engines > Charge forming device (e.g., pollution control) > Including exhaust gas condition responsive means > Multiple sensors controlling group of cylinders
Description: Subject matter wherein a plurality of transducers are located in the flow path of the products of combustion, which are sensitive to a particular component of the products of combustion for adjusting the ratio of fuel and oxidant supplied to a plurality of combustion chambers or cylinders of the engine.










Sub-classes under this class:

Class Number Class Name Patents
123/692 Controlling plural groups of cylinders 74


Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8315782 Method and device for operating an internal combustion engine Nov. 20, 2012
8165789 Vehicle diagnostic tool--determining the efficiency of a catalytic converter Apr. 24, 2012
7850833 Oxygen sensor and air/fuel ratio control system Dec. 14, 2010
7721711 Engine control system including means for learning characteristics of individual fuel injectors May. 25, 2010
7703437 Electronic control device for controlling the internal combustion engine in a motor vehicle Apr. 27, 2010
7546827 Methods for variable displacement engine diagnostics Jun. 16, 2009
7377273 Air-fuel ratio control apparatus for internal combustion engine May. 27, 2008
7328673 Valve timing correction control apparatus and method for an internal combustion engine Feb. 12, 2008
7177711 Interface module Feb. 13, 2007
7159547 Control apparatus for multi-cylinder internal combustion engine and control method Jan. 9, 2007
7103467 Device for detecting response characteristics of sensor Sep. 5, 2006
7021046 Engine system and method for efficient emission control device purging Apr. 4, 2006
7010416 Systems and methods for resetting vehicle emission system error indicators Mar. 7, 2006
6938410 Temperature management of catalyst system for a variable displacement engine Sep. 6, 2005
6882928 Enhanced diagnosis of a multi-banked catalyst exhaust system Apr. 19, 2005
6631611 Methodology of robust initialization of catalyst for consistent oxygen storage capacity measurement Oct. 14, 2003
6615812 Method and arrangement for operating an internal combustion engine Sep. 9, 2003
6567738 Fueling control system May. 20, 2003
6550466 Method for controlling the frequency of air/fuel ratio oscillations in an engine Apr. 22, 2003
6470867 Multi cylinder internal combustion engine comprising a cylinder head internally defining exhaust passages Oct. 29, 2002
6371097 UEGO control circuit board portion with ASIC Apr. 16, 2002
6324835 Engine air and fuel control Dec. 4, 2001
6202415 Method and device for monitoring the functioning of two exhaust-gas turbochargers Mar. 20, 2001
6182498 Oxygen sensor Feb. 6, 2001
6067794 Dual control loop system and method for internal combustion engines May. 30, 2000
6055970 Control system for an outboard motor May. 2, 2000
6018945 Air-fuel ratio control device for engine Feb. 1, 2000
6000218 System for monitoring the functioning ability of catalytic converters and/or lambda sensors Dec. 14, 1999
5974786 Adaptive time window to synchronize pre- and post-catalyst oxygen sensor switch counters Nov. 2, 1999
5970707 Exhaust gas purification device for an internal combustion engine Oct. 26, 1999
5954039 Air/fuel ratio control system Sep. 21, 1999
RE35887 Conversion efficiency measuring apparatus of catalyst used for exhaust gas purification of internal combustion engine and the method of the same Sep. 8, 1998
5767386 Exhaust gas sensor and circuit configuration for the exhaust gas sensor Jun. 16, 1998
5598702 Method and apparatus for controlling the air-fuel ratio of an internal combustion engine Feb. 4, 1997
5537321 Diagnostic apparatus for controlling the operation of a catalytic converter Jul. 16, 1996
5533332 Method and apparatus for self diagnosis of an internal combustion engine Jul. 9, 1996
5515834 Air-fuel ratio control system for an internal combustion engine May. 14, 1996
5485382 Oxygen sensor deterioration-detecting system for internal combustion engines Jan. 16, 1996
5473888 Air-fuel ratio control system for internal combustion engine Dec. 12, 1995
5426935 Air-fuel ratio control system for internal combustion engines Jun. 27, 1995
5426934 Engine and emission monitoring and control system utilizing gas sensors Jun. 27, 1995
5417060 Air fuel ratio control apparatus for an internal combustion engine May. 23, 1995
5414995 Failure detection system for air-fuel ratio control system May. 16, 1995
5402640 Air-fuel ratio control system of internal combustion engine Apr. 4, 1995
5375415 Adaptive control of EGO sensor output Dec. 27, 1994
5365216 Catalyst monitoring using ego sensors Nov. 15, 1994
5361582 Dual sensor type air fuel ratio control system for internal combustion engine Nov. 8, 1994
5363091 Catalyst monitoring using ego sensors Nov. 8, 1994
5357754 Catalyst deterioration-detecting device for internal combustion engines Oct. 25, 1994
5357751 Air/fuel control system providing catalytic monitoring Oct. 25, 1994

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