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Class Information
Number: 123/672
Name: Internal-combustion engines > Charge forming device (e.g., pollution control) > Including exhaust gas condition responsive means
Description: Subject matter wherein the means for forming the mixture of fuel and oxidant senses at least one characteristic or parameter of the products of combustion (e.g., composition, or temperature or pressure, etc.) and uses such information to modify the relative proportion or ratio of fuel and oxidant in the mixture supplied to the internal combustion engine.










Sub-classes under this class:

Class Number Class Name Patents
123/677 Combined with ambient condition responsive means (e.g., pressure) 62
123/679 Combined with engine condition responsive means 138
123/703 Exhaust gas composition sensor 152
123/676 Exhaust gas temperature or pressure repsonsive 291
123/691 Multiple sensors controlling group of cylinders 151
123/698 With addition of secondary fluid (e.g., fuel or exhaust gas) 278
123/701 With auxiliary control of carburetor 48
123/693 With compensator for sensor output (e.g., current or voltage) 58
123/690 With fail-safe, backup, or malfunction means 193
123/674 With modifying or updating memory (i.e., learning) 447
123/673 With sensor controlling each cylinder individually 178


Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
7320309 Method and device for controlling an internal combustion engine Jan. 22, 2008
7314044 Marine emissions control Jan. 1, 2008
7296562 Control system and method for estimating turbocharger performance Nov. 20, 2007
7270118 Control apparatus of engine Sep. 18, 2007
7243017 Method for controlling internal combustion engine emissions Jul. 10, 2007
7234455 Robust maximum engine torque estimation Jun. 26, 2007
7225763 Fumigation system for a diesel engine Jun. 5, 2007
7209826 Fuel properties estimation for internal combustion engine Apr. 24, 2007
7191050 Variable valve control apparatus for internal combustion engine and method thereof Mar. 13, 2007
7177752 Method of regulating an internal combustion engine Feb. 13, 2007
7168423 Gas sensor units for engines Jan. 30, 2007
7149619 Method of regulating an internal combustion engine Dec. 12, 2006
7128065 Method and device for controlling an internal combustion engine Oct. 31, 2006
7117078 Intake oxygen estimator for internal combustion engine Oct. 3, 2006
7028675 Vapor fueled engine Apr. 18, 2006
6990968 Engine fuel injection amount control device Jan. 31, 2006
6985809 Control apparatus, control method, and engine control unit Jan. 10, 2006
6978774 Emission control valve for gas-fueled engines Dec. 27, 2005
6975933 Fuel properties estimation for internal combustion engine Dec. 13, 2005
6966308 Vapor fueled engine Nov. 22, 2005
6962139 Speed control method Nov. 8, 2005
6962145 Failure detection apparatus for an internal combustion engine Nov. 8, 2005
6939037 Determining the temperature of an exhaust gas sensor by means of calibrated internal resistance measurement Sep. 6, 2005
6932067 Exhaust gas purifying system Aug. 23, 2005
6925373 Virtual sensor for the exhaust emissions of an endothermic motor and corresponding injection control system Aug. 2, 2005
6907866 Vapor fueled engine Jun. 21, 2005
6904899 Air-fuel ratio controller for internal-combustion engine Jun. 14, 2005
6901889 Fumigation system for a diesel engine Jun. 7, 2005
6877498 Oxygen sensor deterioration diagnosis apparatus Apr. 12, 2005
6873901 Method for operating an electronic controller of a motor vehicle Mar. 29, 2005
6868326 Control apparatus, control method, control unit, and engine control unit Mar. 15, 2005
6863058 System and method for reducing NOx emissions during transient conditions in a diesel fueled vehicle Mar. 8, 2005
6848438 Internal combustion engine exhaust device and method for making same Feb. 1, 2005
6820603 Control system and control method for internal combustion engine, and engine control unit Nov. 23, 2004
6789533 Engine control system Sep. 14, 2004
6760657 Engine air-fuel ratio control Jul. 6, 2004
6758201 Fuel injection control system for internal combustion engine Jul. 6, 2004
6745747 Method for air-fuel ratio control of a lean burn engine Jun. 8, 2004
6679222 Method of metering fuel using a fuel injector Jan. 20, 2004
6675788 Air-Fuel ratio control apparatus for an internal combustion engine and controlling method Jan. 13, 2004
6672296 Cylinder head structure in multi-cylinder engine Jan. 6, 2004
6666197 Process and device for controlling cylinder selective filling in a combustion engine having a variable operation Dec. 23, 2003
6619277 Engine air-fuel ratio control Sep. 16, 2003
6609496 Engine controller for an internal combustion engine Aug. 26, 2003
6591822 Air-fuel ratio controller of internal combustion engines Jul. 15, 2003
6508241 Equivalence ratio-based system for controlling transient fueling in an internal combustion engine Jan. 21, 2003
6470867 Multi cylinder internal combustion engine comprising a cylinder head internally defining exhaust passages Oct. 29, 2002
6408680 Sensor and method for the manufacture Jun. 25, 2002
6374817 Application of OP-AMP to oxygen sensor circuit Apr. 23, 2002
6311680 Active adaptive bias for closed loop air/fuel control system Nov. 6, 2001

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