About 15 results
https://drivepatents.com/patents/939320 · 10 Aug 2016
The abnormality diagnosis system of an air-fuel ratio sensor comprising an exhaust purification catalyst, an upstream side air-fuel ratio sensor provided at an upstream side of the exhaust purification catalyst, a downstream air-fuel ratio sensor provided ...
https://drivepatents.com/patents/942722 · 25 May 2016
An abnormality diagnosis system which can reliably detect a crack of element of an air-fuel ratio sensor. An abnormality diagnosis system of limit current type air-fuel ratio sensors (40, 41) provided in the exhaust passage of the internal combustion engin...
https://drivepatents.com/patents/947900 · 9 Dec 2015
This control device for an internal combustion engine is equipped with: an air/fuel ratio sensor provided to the exhaust passage of an internal combustion engine; and an engine control device that controls the internal combustion engine according to the ou...
https://drivepatents.com/patents/947894 · 9 Dec 2015
This control device for an internal combustion engine is equipped with: an air/fuel ratio sensor; and an engine control device that controls the internal combustion engine according to the output of the air/fuel ratio sensor. The air/fuel ratio sensor is c...
https://drivepatents.com/patents/998101 · 19 Sep 2012
A method for fault identification of gas sensors exposed to a gas mixture is disclosed for gas sensors having an output that depends on concentrations of two gas species in the gas mixture. The method includes receiving output signals from two such sensors...
https://drivepatents.com/patents/1072104 · 30 Nov 2005
The invention relates to a diagnostic device and method of an engine exhaust purifying system, which perform active control of an air-fuel ratio and can make diagnosis of air-fuel ratio sensors (81, 82), catalysts (70, 75), etc. in the engine exhaust purif...
https://drivepatents.com/patents/1082544 · 10 Nov 2004
To determine the components of an exhaust gas composition, from an internal combustion motor (1), a gas sensor (5) is downstream of a catalyst (4) in the exhaust gas pipe (3). The sensor is linked to an electronic control unit (7). A second sensor (5) is i...
https://drivepatents.com/patents/1085615 · 14 Jul 2004
The method involves measuring a time delay by a sensor (14) until rear lambdasond (17) senses the oxygen loaded or oxygen unloaded condition of a catalyst (16). Another delay is measured by the lambdasond until it senses the oxygen unloaded or loaded condi...
https://drivepatents.com/patents/1093958 · 20 Aug 2003
The forced stimulation method has 2 different weak/rich amplitude values superimposed on the lambda required value during successive sets of exhaust packets, the regulation device determining the second amplitude value and a component of the second exhaust...
https://drivepatents.com/patents/1094187 · 6 Aug 2003
The process to protect against mixing up of two measuring probes in a waste gas aftertreatment system for a motor vehicle engine digitizes voltage signals from the probes, stores and compares them with characteristic values to test for an exchange and exch...