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Exhaust gas analyzer for diesel engines

  • US 4,257,258 A
  • Filed: 08/22/1979
  • Issued: 03/24/1981
  • Est. Priority Date: 08/23/1978
  • Status: Expired due to Term
First Claim
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1. An exhaust gas analyzer apparatus having a conduit means including an inlet for receiving exhaust gas from an internal combustion engine and an outlet, said apparatus comprising:

  • (a) a gas analyzer device connected to the conduit means at the outlet thereof;

    (b) electrostatic filter means interposed in said conduit means between the inlet and the gas analyzer device to receive said gas from said conduit means and to filter said exhaust gas for delivery to said gas analyzer device, said electrostatic filter means comprising ionization electrode means, first and second collector electrode means, an electrical power source and means connecting said electrical power source to said ionization electrode means and to at least one of said first and second collector electrode means;

    (c) a source of pressurized fluid, and(d) valve means interposed in said conduit means between said electrostatic filter means and said analyzer device and coupled also to said source of pressurized fluid for selectively controlling flow of said pressurized fluid to said electrostatic filter means and interrupting flow of exhaust gas to said gas analyzing device.

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