Exhaust purification device for internal combustion engine

Exhaust purification device for internal combustion engine

  • CN 105,765,186 A
  • Filed: 11/27/2014
  • Published: 07/13/2016
  • Est. Priority Date: 11/27/2013
  • Status: Active Application
First Claim
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1. an emission-control equipment for internal combustion engine, possesses:

  • Selective reduction type catalyst, it is configured in the exhaust passage of internal combustion engine, and using ammonia as reducing agent to the NO in aerofluxusXPurify;

    Feedway, it adds the additive as ammonia or the presoma of ammonia to compared with described selective reduction type catalyst in aerofluxus by the upstream;

    Temperature detecting unit, the temperature of described selective reduction type catalyst is detected by it;

    Control unit, it, when the temperature detected by described temperature detecting unit is higher than predetermined temperature, compared with when being below predetermined temperature with the temperature detected by described temperature detecting unit, makes the NO as the aerofluxus flowed into described selective reduction type catalystXThe NO of concentrationXInflow concentration increases, and makes the addition of additive increase, so that as ammonia amount relative to NO contained in the aerofluxus flowed into described selective reduction type catalystXAmount ratio equivalent proportion increase.

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