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Diesel engine exhaust particle collection device

  • US 5,950,424 A
  • Filed: 10/07/1996
  • Issued: 09/14/1999
  • Est. Priority Date: 10/24/1995
  • Status: Expired due to Fees
First Claim
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1. A diesel engine exhaust particle collection device for collecting, under electrical control, particles in an exhaust from a diesel engine, comprising:

  • a needle electrode having a needle tip for charging up said particles by creating a corona discharge around said needle tip;

    a collecting electrode for collecting said charged particles by electrostatic force;

    a deflection electrode for imparting deflection force to said charged particles towards said collecting electrode;

    a high voltage power source for applying a prescribed high voltage between said needle electrode and said collecting electrode and between said deflection electrode and said collecting electrode;

    said needle electrode being fixed to a tip of said deflection electrode;

    said deflection electrode being rod-shaped and larger in diameter than said needle electrode, a shoulder portion being formed thereby;

    wherein exhaust gas passing close to said needle electrode is disturbed in flow by said shoulder portion and forced to stay for a longer period of time in said corona discharge.

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