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Exhaust gas particle burning method and apparatus for an internal combustion engine

  • US 4,424,671 A
  • Filed: 02/19/1982
  • Issued: 01/10/1984
  • Est. Priority Date: 02/20/1981
  • Status: Expired due to Fees
First Claim
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1. A method of burning away exhaust particles emitted by an internal combustion engine and collected on a filter by using a burner with a glow plug, which comprises the following steps of:

  • (a) detecting exhaust gas pressure on the upstream side of the filter;

    (b) detecting at least one engine operating condition;

    (c) detecting engine idling;

    (d) storing various reference exhaust gas pressure limit values allocated according to the detected engine operating conditions;

    (e) comparing the detected exhaust gas pressure with the stored reference exhaust gas pressure limit value;

    (f) measuring a predetermined time period after engine idling condition has been detected; and

    (g) outputting a signal to supply fuel to the burner and to actuate the glow plug for the predetermined period of time after engine idling condition has been detected and the detected exhaust gas pressure has exceeded the stored reference gas pressure limit value according to the detected engine operating conditions.

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