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US08490385B2 Catalyst deterioration diagnosis system and method for internal combustion engine 有权
催化剂劣化诊断系统和内燃机方法

Catalyst deterioration diagnosis system and method for internal combustion engine
摘要：
A catalyst deterioration diagnosis system performs a diagnosis of deterioration of the oxidation catalyst based on a high-temperature-inflow-condition exhaust gas temperature and a low-temperature-inflow-condition exhaust gas temperature. The high-temperature-inflow-condition exhaust gas temperature is a temperature detected by a temperature sensor while the temperature of the exhaust gas that flows into the oxidation catalyst is in a high temperature region H while the reducing agent is supplied from the reducing agent supply means into the exhaust gas that flows into the oxidation catalyst. The low-temperature-inflow-condition exhaust gas temperature is a temperature detected by the temperature sensor while the temperature of the exhaust gas that flows into the oxidation catalyst is in a low temperature region L while the reducing agent is supplied from a reducing agent supply means into the exhaust gas that flows into the oxidation catalyst.
摘要（中）：

催化剂劣化诊断系统基于高温流入条件排气温度和低温流入条件排气温度来诊断氧化催化剂的劣化。 高温流入条件废气温度是由温度传感器检测的温度，而流入氧化催化剂的废气的温度处于高温区域H，同时还原剂从还原剂供给源供给 意味着流入氧化催化剂的废气。 低温流入条件废气温度是由温度传感器检测的温度，而流入氧化催化剂的废气的温度处于低温区域L，而还原剂由还原剂供给源 意味着流入氧化催化剂的废气。

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