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Process for acquiring a charged state of a nitrogen oxides storage catalyst arranged in an exhaust gas channel of a lean-burn internal combustion engine comprises determining the nitrogen oxides
Process for acquiring a charged state of a nitrogen oxides storage catalyst arranged in an exhaust gas channel of a lean-burn internal combustion engine comprises determining the nitrogen oxides
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机译:用于获取布置在稀薄内燃机的排气通道中的氮氧化物存储催化剂的带电状态的方法包括确定氮氧化物
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摘要
Process for acquiring a charged state of a NOx storage catalyst (22) arranged in an exhaust gas channel (18) of a lean-burn internal combustion engine (10) comprises determining the NOx removal depending on a concentration of reducing agent in the exhaust gas downstream of the storage catalyst or a parameter derived from the reducing agent concentration. Preferred Features: The NOx removal is determined depending on a cumulated reducing agent leakage which is detected using an oxygen-sensitive measuring device (26) arranged downstream of the storage catalyst. The reducing agent consists of unburned hydrocarbons, carbon monoxide and/or hydrogen.
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