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1. 发明授权

US4884398A Method of and apparatus for reducing engine smoke emissions 失效
标题翻译：减少发动机烟雾排放的方法和设备
公开(公告)号：US4884398A
公开(公告)日：1989-12-05
申请号：US217418
申请日：1988-07-08
申请人： Izuru Morita , Keisuke Kishitani , Masayoshi Kajitani , Shoji Tozawa , Masanori Satoh , Kisaburo Otabe , Mamoru Onda
发明人： Izuru Morita , Keisuke Kishitani , Masayoshi Kajitani , Shoji Tozawa , Masanori Satoh , Kisaburo Otabe , Mamoru Onda
IPC分类号： F01N3/022 , F01N3/023 , F01N3/035 , F01N9/00 , F01N13/04 , F02B3/06 , F02D41/38
CPC分类号： F01N3/023 , F01N13/011 , F01N3/0222 , F01N3/035 , F01N9/002 , F02D41/38 , F01N2330/06 , F01N2350/02 , F01N2350/04 , F01N2450/24 , F01N2470/10 , F01N2510/00 , F01N2510/06 , F02B3/06 , F02D2041/0022 , F02D2200/0406 , F02D2250/38 , Y02T10/47
摘要： A method of and apparatus for reducing smoke emitted from a diesel engine are disclosed. The apparatus comprises: a trap for trapping black smoke particles which is disposed within the exhaust system of the engine, the trap including a ceramic trap assembly having a honeycomb structure in which a catalyst which enables lowering of the combustion temperature of black smoke is carried on internal passage walls; a pressure sensor provided at the inlet of the trap; an engine speed sensor; a butterfly valve provided in the intake system of the engine; and a combination of a controller and an actuator for the butterfly valve. In this apparatus and method the controller obtains a specified exhaust pressure range in the trap on the basis of a signal from the engine speed sensor, compares an exhaust pressure signal from the pressure sensor with the specified exhaust pressure range, and controls the actuator so that the actuator controls the degree of opening of the butterfly valve so that the exhaust pressure inside the trap is maintained within the specified exhaust pressure range. By this means, black smoke particles can be controllably burned by means of exhaust gas without causing any engine trouble. Since the trap can be regenerated with the ceramic trap assembly left in place in, for example, a construction machine, it is possible to provide a diesel engine smoke reducing apparatus which is superior in both serviceability and durability.
摘要翻译：公开了一种用于减少从柴油发动机排放的烟雾的方法和装置。该装置包括：用于捕获布置在发动机的排气系统内的黑色烟雾颗粒的捕集阱，捕集器包括具有蜂窝结构的陶瓷捕集器组件，其中可以进行能够降低黑烟燃烧温度的催化剂内部通道壁; 设置在所述捕集器入口处的压力传感器; 发动机转速传感器; 设置在发动机的进气系统中的蝶阀; 以及用于蝶阀的控制器和致动器的组合。在该装置和方法中，控制器基于来自发动机转速传感器的信号，在陷阱中获得指定的排气压力范围，将来自压力传感器的排气压力信号与规定的排气压力范围进行比较，并且控制致动器，使得致动器控制蝶阀的开度，使得捕集器内的排气压力保持在规定的排气压力范围内。通过这种方式，黑烟粒子可以通过废气可控地燃烧，而不会引起任何发动机故障。由于在例如建筑机械中将陶瓷捕集器组件保持在适当位置的情况下可以再生捕获阱，所以可以提供一种在使用性和耐久性方面都优异的柴油机减烟装置。

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