×

Carbon particulates cleaning device for diesel engine

  • US 4,450,682 A
  • Filed: 08/22/1983
  • Issued: 05/29/1984
  • Est. Priority Date: 02/18/1980
  • Status: Expired due to Term
First Claim
Patent Images

1. A carbon particulates cleaning device for cleaning the carbon particulates contained in the exhaust gas discharged from a diesel engine of an automobile or the like, comprising:

  • an exhaust gas passage adpated to be communicated with an exhaust manifold of a diesel engine;

    said exhaust gas passage being formed by an exhaust gas main pipe and an exhaust gas branch pipe which is diverged from said exhaust gas main pipe;

    a carbon particulates catching member which is provided within at least one of said exhaust gas main pipe and said exhaust gas branch pipe;

    said carbon particulates catching member being composed of a plurality of ceramic foamed bodies which are arranged in the exhaust gas flowing direction so that opposed end surfaces of each ceramic foamed body are closely contacted with each other, the length of the upstream ceramic foamed body being shorter than that of the downstream ceramic foamed body;

    a valve means which is provided in the portion where said exhaust gas branch pipe is diverged from said exhaust gas main pipe for selectively supplying said exhaust gas into said exhaust gas main pipe or said exhaust gas branch pipe;

    a heating means which is provided adjacent to the upstream end of said carbon particulates catching member on the upstream side thereof for applying heat to said carbon particulates catching member so as to burn the carbon particulates caught by said carbon particulates catching member;

    a gas supplying means which is provided in at least one of said exhaust gas main pipe and said exhaust gas branch pipe, adjacent to said heating means on the upstream side thereof for supplying gas into said carbon particulates catching member;

    a carbon particulates volume detecting means which is provided in at least one of said exhaust gas main pipe and said exhaust gas branch pipe for detecting the volume of the carbon particulates caught by said carbon particulates catching member and which generates electrical signals when the volume of caught carbon particulates reaches a predetermined volume; and

    a control means which is electrically connected to said carbon particulates volume detecting means, said valve means, said heating means and said gas supplying means for supplying electrical signals to said valve means, said heating means and said gas supplying means upon receiving said electrical signals from said carbon particulates volume detecting means so as to start the operation of said valve means, said heating means and said gas supplying means;

    whereby when the volume of the carbon particulates caught by said carbon particulates catching member reaches a predetermined volume, said valve means closes said exhaust gas passage leading to said carbon particulates catching member and opens another exhaust gas passage, said heating means applies heat to the upstream end of said carbon particulates catching means for a predetermined time and said gas supplying means supplies gas into said heating means until the carbon particulates caught by said carbon particulates catching member are burnt off.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×