Exhaust gas purifier for internal combustion engines
AssigneeMitsubishi Jidosha Kogyo Kabushiki Kaisha
InventorsYasuki Tamura, Kojiro Okada, Tomohiro Ohashi, Naoto Yamada, Kazuo Koga
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Abstract
An exhaust passage (20) of an internal-combustion engine (1) is provided with exhaust emission control means (40) capable of reducing harmful substances in exhaust gas under a given exhaust pressure condition and an exhaust sensor (22) for detecting the concentration of a specific exhaust component (H2, O2) in the exhaust gas, and performance lowering identifying means identifies lowering of the performance of the exhaust emission control means (40) by detecting a failure to fulfill the given exhaust pressure condition in accordance with the output of the exhaust sensor.
Claims12
An exhaust emission control device of an internal-combustion engine, comprising:
- exhaust emission control means located in an exhaust passage of the internal-combustion engine and capable of reducing harmful substances in exhaust gas under a given exhaust pressure condition;
- an exhaust sensor for detecting the concentration of a specific exhaust component in said exhaust gas;
- and
- performance lowering identifying means for identifying lowering of the performance of said exhaust emission control means by detecting a failure to fulfill said given exhaust pressure condition in accordance with the output of said exhaust sensor.
Dependencies are inferred from the claim text.