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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
8712667 Air-fuel ratio control apparatus for an internal combustion engine Apr. 29, 2014
8706424 System for estimating a gas concentration in a mixed atmosphere Apr. 22, 2014
8682566 Engine idle speed and turbocharger speed control Mar. 25, 2014
8670920 Uego sensor air-fuel ratio determination system and method Mar. 11, 2014
8670919 Method for diagnosing the condition of an engine fuel supply system Mar. 11, 2014
8649956 Apparatus for acquiring responsibility of oxygen concentration sensor Feb. 11, 2014
8627648 Engine control system, engine control method Jan. 14, 2014
8594907 Robust estimation of biodiesel blend ratio for alternative fuel combustion Nov. 26, 2013
8589055 Inter-cylinder air/fuel ratio imbalance determination apparatus and inter-cylinder air/fuel ratio imbalance determination method Nov. 19, 2013
8583348 Fuel injection amount control system, fuel injection amount control device, and fuel injection amount control method of multi-cylinder internal combustion engine Nov. 12, 2013
8571785 Universal tracking air-fuel regulator for internal combustion engines Oct. 29, 2013
8560208 Inter-cylinder air-fuel ratio imbalance determination apparatus for internal combustion engine Oct. 15, 2013
8554450 Control apparatus and control method for internal combustion engine Oct. 8, 2013
8554447 Internal combustion engine system controller Oct. 8, 2013
8534265 Fuel supply control apparatus for internal combustion engine and fuel supply control method thereof Sep. 17, 2013
8494753 Method and device for operating an internal combustion engine Jul. 23, 2013
8463532 Control device for engine Jun. 11, 2013
8443601 Method for controlling a wastegate in a turbocharged internal combustion engine May. 21, 2013
8442744 Compensation for oxygenated fuel use in a diesel engine May. 14, 2013
8406983 Engine idle speed and turbocharger speed control Mar. 26, 2013
8402943 Method for controlling spark for particulate filter regenerating Mar. 26, 2013
8406980 Air-fuel ratio control device and air-fuel ratio control method for internal combustion engine Mar. 26, 2013
8387592 Method and apparatus for operating an internal combustion engine Mar. 5, 2013
8360040 Engine controller Jan. 29, 2013
8352158 Method and system for compensating engine thermal conditions Jan. 8, 2013
8291893 Device for determining activation of exhaust gas sensor and control device for internal combustion engine Oct. 23, 2012
8286610 Control device for internal combustion engine Oct. 16, 2012
8239117 Method and device for operating an internal combustion engine Aug. 7, 2012
8224557 Control systems and methods using geometry based exhaust mixing model Jul. 17, 2012
8205605 Method for operating an internal combustion engine Jun. 26, 2012
8209106 Control apparatus for internal combustion engine Jun. 26, 2012
8190349 Control device of internal combustion engine May. 29, 2012
8161954 Fuel supply control apparatus Apr. 24, 2012
8136513 Internal combustion engine Mar. 20, 2012
8140248 System and method for obtaining an optimal estimate of NOx emissions Mar. 20, 2012
8131446 Engine idle speed and turbocharger speed control Mar. 6, 2012
8126632 Engine idle speed and turbocharger speed control Feb. 28, 2012
8109255 Engine controller Feb. 7, 2012
8103393 Aircraft exhaust gas temperature monitor Jan. 24, 2012
8103425 Simulation-based control for HCCI power systems Jan. 24, 2012
8103429 System and method for operating a compression-ignition engine Jan. 24, 2012
8061121 Flex fuel internal combustion engine system Nov. 22, 2011
8050852 Abnormality detection device for internal combustion engine and air/fuel ratio control apparatus for internal combustion engine Nov. 1, 2011
7997257 Method and a device for operating a internal combustion engine Aug. 16, 2011
8000881 Internal combustion engine control device Aug. 16, 2011
7975679 Other-type fuel contamination determination apparatus for internal combustion engine Jul. 12, 2011
7968827 Oxygen sensor heater control strategy Jun. 28, 2011
7946280 Method for the operation of an internal combustion engine May. 24, 2011
7937209 Air fuel ratio control system for internal combustion engines May. 3, 2011
7925421 Off-line calibration of universal tracking air fuel ratio regulators Apr. 12, 2011

1 2 3 4 5

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