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Class Information
Number: 123/693
Name: Internal-combustion engines > Charge forming device (e.g., pollution control) > Including exhaust gas condition responsive means > With compensator for sensor output (e.g., current or voltage)
Description: Subject matter wherein a signal from a transducer is adjusted or modified before being received by a control means for the mixture forming means.

Sub-classes under this class:

Class Number Class Name Patents
123/697 Heater for sensor or sensor environment 155
123/694 Output fed to compensating circuit 137

Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8486166 Fuel reforming apparatus Jul. 16, 2013
8230846 Air-fuel ratio control device for internal combustion engine Jul. 31, 2012
8108130 Method for calibrating a lambda sensor and internal combustion engine Jan. 31, 2012
7968827 Oxygen sensor heater control strategy Jun. 28, 2011
7900614 Self-calibrating NO.sub.x sensor Mar. 8, 2011
7850833 Oxygen sensor and air/fuel ratio control system Dec. 14, 2010
7762244 Method and device for adapting the recording of a measured signal for an exhaust probe Jul. 27, 2010
6883510 Mixture adaptation method Apr. 26, 2005
6497135 Controller for use with wide range oxygen sensor Dec. 24, 2002
6352632 Connector for NOx sensor Mar. 5, 2002
6347544 Control method for gas concentration sensor Feb. 19, 2002
6231735 Oxygen linear sensor test arrangement May. 15, 2001
6192874 Device for measuring oxygen content in a gas medium Feb. 27, 2001
5925088 Air-fuel ratio detecting device and method Jul. 20, 1999
5837114 Arrangement for determining the concentration of a component in a gas mixture Nov. 17, 1998
5658445 Combination of lambda probes Aug. 19, 1997
5580440 Air fuel ratio sensory Dec. 3, 1996
5429105 Current replication circuit and method for use in exhaust gas oxygen monitoring Jul. 4, 1995
5227975 Air/fuel ratio feedback control system for internal combustion engine Jul. 13, 1993
5211154 Method and apparatus for maintaining stoichiometric air-to-fuel ratio in an internal combustion engine May. 18, 1993
5182907 System for monitoring performance of HC sensors for internal combustion engines Feb. 2, 1993
4981125 Output correction method for exhaust gas ingredient-concentration sensors of proportional-output type Jan. 1, 1991
4944274 Air-fuel ratio control apparatus for internal combustion engines Jul. 31, 1990
4915813 Oxygen concentration detecting device Apr. 10, 1990
4915077 Air-fuel ratio control apparatus Apr. 10, 1990
4842711 Device for detecting air-fuel ratio of engine Jun. 27, 1989
4841934 Oxygen pumping device for control of the air fuel ratio Jun. 27, 1989
4767520 Device for detecting air-fuel ratio of engine Aug. 30, 1988
4732127 Air/fuel ratio control system for an internal combustion engine with a function for preventing the blackening phenomenon of oxygen concentration sensor Mar. 22, 1988
4721084 Method for controlling an oxygen concentration sensor for sensing an oxygen concentration in an exhaust gas of an internal combustion engine Jan. 26, 1988
4706637 Oxygen concentration sensing device for an air-fuel ratio control system of an automotive internal combustion engine Nov. 17, 1987
4707241 Air/fuel ratio control system including means to well time start of feedback Nov. 17, 1987
4698209 Device for sensing an oxygen concentration in gaseous body with a source of pump current for an oxygen pump element Oct. 6, 1987
4665874 Device for sensing an oxygen concentration in gaseous body with a pump current supply circuit and an air/fuel ratio control system using an oxygen concentration sensing device May. 19, 1987
4663717 Fuel control system having sensor verification dual modes May. 5, 1987
4658790 Air/fuel ratio detecting device and control system using same Apr. 21, 1987
4622125 Oxygen concentration control system Nov. 11, 1986
4615787 Air/fuel ratio detector Oct. 7, 1986
4601809 Oxygen concentration detecting system using oxygen sensor including oxygen ion pump Jul. 22, 1986
4598682 Method of controlling air-fuel ratio of an engine Jul. 8, 1986
4586476 Air-to-fuel ratio detector for engines May. 6, 1986
4566419 Apparatus and method for controlling air-to-fuel ratio for an internal combustion engine Jan. 28, 1986
4548179 Air-fuel ratio control system Oct. 22, 1985
4539958 Method of learn-controlling air-fuel ratio for internal combustion engine Sep. 10, 1985
4519237 Oxygen-sensing system May. 28, 1985
4499880 Air-fuel ratio controlling apparatus for internal combustion engine Feb. 19, 1985
4440621 System for detection of air/fuel ratio in IC engine by using oxygen sensor operated with supply of current Apr. 3, 1984
4355618 Method and apparatus for obtaining a control variable for the closed-loop control of the fuel-air ratio in the operating mixture of internal combustion engines Oct. 26, 1982
4355615 Air/fuel ratio control device for an internal combustion engine Oct. 26, 1982
4344317 Air-fuel ratio detecting system Aug. 17, 1982

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