Exhaust gas purifying apparatus for internal combu

专利名称：Exhaust gas purifying apparatus for internal

combustion engine

发明人：TAGA, Junichi,YOKOTA, Kazuya,KUJI, Youichi申请号：EP02100672.1申请日：20020606公开号：EP1270908A2公开日：20030102

专利附图：

摘要：An exhaust gas purifying apparatus comprises a control unit (29) operative toestimate an amount of NOx absorbed by a NOx trap material (17) disposed in an exhaustpassage (10) and to make an air-fuel ratio richer so as thereby to cause the NOx trap

material to release sulfur when the estimated amount of NOx absorption exceeds aspecified amount. Further, the control unit (29) operative to estimate an amount of sulfurabsorbed by the NOx trap material (17) and to make an air-fuel ratio richer and rising atemperature of exhaust gas so as thereby to cause the NOx trap material to releasesulfur when the estimated amount of sulfur absorption exceeds a specified amount. Thecontrol means restricts an air-fuel ratio from being made richer when the NOx trapmaterial is not expected to absorb NOx due to progress of sulfur absorption resultingfrom conditionally the sulfur releasing.

申请人：Mazda Motor Corporation

地址：No. 3-1, Shinchi Fuchu-cho Aki-gun Hiroshima-ken JP

国籍：JP

代理机构：Messulam, Alec Moses

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