About 40 results
https://drivepatents.com/patents/1084383 · 1 Sep 2004
An apparatus of the invention controls the air-fuel ratio in response to the stable output of an oxygen sensor (37). When a system protector (138) detects a disorder in apower network (14), it outputs failure signal. A connection relay (135) is opened in r...
https://drivepatents.com/patents/1084380 · 1 Sep 2004
In exhaust gas purifying apparatus and method for an internal combustion engine, an abnormality determination of an NOx (Nitrogen Oxides) removing catalyst is executed on the basis of output values of both of a first exhaust gas atmosphere detecting sectio...
https://drivepatents.com/patents/1084992 · 11 Aug 2004
A sensor (200) including: an upper shell (102), an outer shield (108) disposed in physical communication with the upper shell (102), a sensing element (100) comprising a sensing electrode (12) and a reference electrode (14) disposed at a sensing end of the...
https://drivepatents.com/patents/1086053 · 30 Jun 2004
In order to maintain a conversion efficiency of a downstream catalyst at a high level, it is provided an exhaust purification device comprising a first catalyst provided in an engine exhaust pipe, a second catalyst provided downstream of said first catalys...
https://drivepatents.com/patents/1086928 · 26 May 2004
Method for diagnosis of the correct operation of a motor vehicle exhaust catalytic converter, whereby the vehicle engine is switched from lean to rich operation. When a preset start value is reached for a first lambda probe (4) a time measurement is trigge...
https://drivepatents.com/patents/1088277 · 7 Apr 2004
A method and system are provided for monitoring exhaust gas conversion efficiency of a catalytic converter 30 during operation of an internal combustion engine 12 coupled to the catalytic converter. The system 10 includes an upstream exhaust gas sensor 32 ...
https://drivepatents.com/patents/1094257 · 6 Aug 2003
A method for determining the effectiveness of a catalyst (36) having both first, relatively high oxidizable material provided to remove emissions from the exhaust of an internal combustion engine (12) and a second, relatively low oxidizable material provid...
https://drivepatents.com/patents/1096701 · 16 Apr 2003
In an internal combustion engine (1,100), a first exhaust passage (10A) having an oxygen storing catalyst (11A) is connected to cylinders of a first group (1A), and a second exhaust passage (10B) having an oxygen storing catalyst (11B) is connected to cyli...
https://drivepatents.com/patents/1096896 · 9 Apr 2003
This invention relates to a method and apparatus for controlling the air-fuel ratio demanded by a fuel controller in order to maintain optimum performance of a catalytic converter. The invention provides a controller for requesting an air fuel ratio accord...
https://drivepatents.com/patents/1099773 · 18 Dec 2002
A control unit for controlling an automobile has a one-chip microcomputer including an internal memory (2) for storing an operating program and an application program. An external memory (7) is connected to the one-chip microcomputer which stores an additi...