Misfire detection system for internal combustion engine

Misfire detection system for internal combustion engine

  • CN 1,796,754 B
  • Filed: 12/22/2005
  • Issued: 02/22/2012
  • Est. Priority Date: 12/28/2004
  • Status: Active Grant
First Claim
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1. the misfire detecting apparatus of an internal-combustion engine is characterized in that, has:

  • angular velocity of crankshaft detection unit, its every angular velocity of crankshaft of crossing predetermined crank angle detection internal-combustion engine;

    Computing unit;

    Its burning cycle of calculating the aforementioned predetermined crank angle of every mistake pair and aforementioned internal-combustion engine synchronously generates the torque of each cylinder and carries out modelling and retrieve resulting value according to the periodic function that aforementioned each cylinder is set and amass with aforementioned detected angular velocity of crankshaft is, and aforementioned amassing of calculating carried out integration and calculated integral value in the predetermined interval that is configured to the value suitable with the integral multiple in previous combustion cycle;

    And the detection unit that catches fire, its aforementioned integral value calculated and predetermined value compare, and detect the generation of catching fire of aforementioned internal-combustion engine.

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