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发明公开
CN102317588A 用于向内燃机的废气流中喷射还原剂的定量供应系统 无效 - 驳回

用于向内燃机的废气流中喷射还原剂的定量供应系统
摘要：
本发明涉及一种还原剂定量供应系统以及控制还原剂的喷射的方法，所述还原剂喷射到增压的内燃机的废气流(9)中，以进行选择性催化还原，其中所述还原剂定量供应系统能与还原剂容器(1)连接，还原剂能从所述还原剂容器中获取，其中所述还原剂定量供应系统具有至少一个喷嘴(5)，通过所述喷嘴借助压缩空气能将还原剂喷射到所述废气流(9)中，其中压缩空气的至少一部分从所述内燃机的增压器获取，其中，压缩空气供应装置(6)具有用于产生压缩空气的电动的空气泵(7)和与所述空气泵(7)并联的旁路(19)，从而增压器的增压空气能经由所述旁路(19)溢流越过空气泵(7)。
摘要（英）：

The invention relates to a reducing agent metering system, and to a method for controlling the injection of a reducing agent into the exhaust gas flow (9) of a turbocharged internal combustion engine for selective catalytic reduction, wherein the metering system can be connected to a reducing agent tank (1), from which reducing agent can be removed, wherein the metering system comprises at least one nozzle (5) through which the reducing agent can be injected by means of compressed air into the exhaust gas flow (9), wherein at least one part of the compressed air is taken from a charger of the internal combustion engine, wherein the compressed air supply (6) comprises an electric air pump (7) for generating compressed air, and comprises a bypass (19) in parallel with the air pump (7), so that the charge air of the turbocharger flows over or can flow over the air pump (7).

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