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发明公开
CN102257250A 排气净化装置 无效 - 撤回 复审申请

排气净化装置
摘要：
在对排气中的NOx进行还原净化的催化剂转换器的载体上，在排气流入侧的规定长度部分涂覆有氨吸附材料，另一方面，在排气流出侧的剩余部分涂覆有NOx还原催化剂。另外，在催化剂转换器的载体表面按照顺序涂覆有以混合状态含有氨吸附材料以及NOx还原催化剂的第1层、以及含有加水分解催化剂的第2层。而且，在发动机运转状态的过渡期中，使用吸附于氨吸附材料的氨来对NOx进行还原净化。
摘要（英）：

A catalytic converter for reducing and purifying NOx in exhaust gas is provided with a carrier. An ammonia adsorbing material is coated on that portion of the carrier which is on the exhaust inlet side and has a predetermined length, and a NOx reducing catalyst is coated on that remaining portion of the carrier which is on the exhaust outlet side. Also, a first layer in which an ammonia adsorbing material and a NOx reducing catalyst are contained in a mixed state and a second layer in which a hydrolytic catalyst is contained are coated in that order on the surface of the carrier of the catalytic converter. In a transitional phase during operation of an engine, NOx is reduced and purified using ammonia adsorbed on the ammonia adsorbing material.

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