Exhaust purification device of internal combustion engine
    6.
    发明授权
    Exhaust purification device of internal combustion engine 失效
    内燃机排气净化装置

    公开(公告)号:US5473887A

    公开(公告)日:1995-12-12

    申请号:US66100

    申请日:1993-06-14

    摘要: An NO.sub.x absorbent (18) is disposed in an exhaust passage of an internal combustion engine and the exhaust gas is constantly made to circulate through the NO.sub.x absorbent (18) during the operation of the engine. The NO.sub.x absorbent (18) absorbs the NO.sub.x when the air-fuel ratio of the exhaust gas flowing into the NO.sub.x absorbent (18) is lean and releases the absorbed NO.sub.x when the air-fuel ratio of the exhaust gas flowing into the NO.sub.x absorbent (18) becomes the stoichiometric air-fuel ratio or rich. In the majority of the engine operation region, the lean air-fuel mixture is burned in the combustion chamber (3), and the NO.sub.x generated at this time is absorbed into the NO.sub.x absorbent (18). The air-fuel ratio of the exhaust gas flowing into the NO.sub.x absorbent (18) is periodically made the stoichiometric air-fuel ratio or rich, and the NO.sub.x absorbed in the NO.sub.x absorbent (18) is released, and simultaneously reduced.

    摘要翻译: PCT No.PCT / JP92 / 01279 Sec。 371日期:1993年6月14日 102(e)日期1993年6月14日PCT提交1992年10月2日PCT公布。 公开号WO93 / 07363 日本1999年04月15日。在内燃机的排气通道中设置有NOx吸收剂(18),并且在发动机运转期间不断地使废气循环通过NOx吸收剂(18)。 当流入NOx吸收剂(18)的排气的空燃比是稀的时,NOx吸收剂(18)吸收NOx,并且当流入NOx吸收剂的废气的空燃比释放吸收的NOx 18)成为化学计量空燃比或浓。 在大多数发动机运转区域,稀燃空气燃料混合物在燃烧室(3)中燃烧,此时产生的NOx被吸收到NOx吸收剂(18)中。 流入NOx吸收剂(18)的废气的空燃比被周期性地变成化学计量空燃比或浓,并且吸收在NOx吸收剂(18)中的NOx被释放,同时减少。