Exhaust gas purifying system for internal combustion engines

Details Exhaust gas purifying system for internal combustion engines Exhaust gas purifying system for internal combustion engines

2005-04-19

2005-04-19

Tran, Binh Q. (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

C060S274000, C060S276000, C123S689000, C073S118040

Reexamination Certificate

active

06880329

ABSTRACT:
A first oxygen sensor is mounted on an exhaust pipe. An ECU determines an electric power to be fed to a sensor heater, by a heater control quantity calculating block, in accordance with a difference between an actual impedance and a target impedance calculated by a running condition determining block and a specific gas sensitivity priority determining block. As a result, the detection sensitivity of the oxygen sensor to a rich component or a lean component is improved according to the running condition. This improved output is detected by an output detecting block and reflected on the air/fuel ratio control so that an air/fuel ratio is controlled thereby.

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patent: 6082345 (2000-07-01), Ikeuchi et al.
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patent: 6210641 (2001-04-01), Yamada et al.
patent: 6304813 (2001-10-01), Ikeda et al.
patent: 9-127035 (1997-05-01), None

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