| 摘要 |
<P>PROBLEM TO BE SOLVED: To realize a safe and low-cost device with a simple structure by generating an electric field necessary for purifying exhaust particulates in the entire region of a discharge space with low voltage in a device for and burning these particulates by oxidization in the emission gas of an internal combustion engine by means of corona discharge. <P>SOLUTION: An exhaust emission control device 1 has an inner peripheral wall of a cylindrical housing H connected with an emission flow path E1 of an engine E as a first ground electrode 31, and a second ground electrode 32 is disposed along the center of the housing. An electrode disk 21 of a high voltage electrode 2 is disposed between the first ground electrode 31 and second ground electrode 32 to cause its needle electrodes 24 on the inner and outer peripheries to face the electrodes. An interelectrode gap G between the high voltage electrode 2 and the first ground electrode 31 and second ground electrode 32 is constant, and the cylindrical part radius R of the housing H forming the discharge space 12 and the interelectrode gap G satisfy relation expressed by the cylindrical part radius R≥interelectrode gap G×3. <P>COPYRIGHT: (C)2012,JPO&INPIT |
