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专利名称：Apparatus for controlling exhaust
concentration
发明人：Minoru Ohsuga,Toshimichi Minowa,Nobuo
Kurihara,Yoshishige Ohyama
申请号：US07/883200申请日：19920514公开号：US05357749A公开日：19941025
摘要：A NOx reducing catalyst can most efficiently remove both NOx and HC whenconcentrations of NOx and HC in exhaust have a specified relationship between them. Forthis purpose, an apparatus is adapted to control the concentrations of NOx and HC at anupstream of a catalyst to have a specified relationship. Sensors for detecting theconcentration of NOx and HC are arranged at an upstream side of the catalyst.Additionally, a device for levelling a quantity of HC discharge is disposed to suppressvariation thereof.
申请人：HITACHI LTD.
代理机构：Antonelli, Terry, Stout & Kraus
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