DEVICE FOR CONTROLLABLY RECIRCULATING EXHAUST GAS IN DIESEL ENGINE

摘要

Apparatus is disclosed for supplying air to a corona discharge device to eliminate contamination within the corona unit and associated apparatus. Before introduction of the air into the corona device, the air is first passed through a particle filter to eliminate dust particles and then through an ammonia filter to prevent the formation of particulate material within the corona device. The ammonia filter contains a chemically active material to react with the ammonia in the air and apparatus is provided to sense end-of-life of the ammonia filter.