To meet current US emission standards for automobiles, hydrocarbon (HC) and carbon monoxide (CO) emissions are usually controlled by a catalytic converter in the automobile exhaust. Federal standards for nitrogen oxides (NOx) emissions are met mainly by exhaust-gas recirculation (EGR) techniques. However, in 1981, when NOx emissions standards are tightened from the current limit of 2.0 grams per mile to 1.0 gram per mile, these techniques alone may no longer be sufficient. Although many schemes are under investigation for meeting the 1981 emissions standards for all three emissions, one of the most promising employs a three-way catalyst-for HC, CO, and NOx emissions-in conjunction with a closed loop engine-control system. The problems involved in this approach and the engineering designs to solve these problems are addressed in this article.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Closed-loop engine control


    Additional title:

    Motor-Regelung


    Contributors:

    Published in:

    IEEE Spectrum ; 14 , 11 ; 52-55


    Publication date :

    1977


    Size :

    4 Seiten


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    Closed-Loop Control of an HCCI Engine

    Johansson, Bengt / Olsson, Jan-Ola / Tunestål, Per | SAE Technical Papers | 2001


    Closed-loop control of an HCCI engine

    Olsson,J.O. / Tunestal,P. / Johansson,B. et al. | Automotive engineering | 2001


    Nonlinear, Closed Loop, SI Engine Control Observers

    Hendricks, Elbert / Sorenson, Spencer C. / Vesterholm, Thomas | SAE Technical Papers | 1992


    Closed loop engine control using multiple microprocessors

    Sharma,R.P. / Ganesan,S. / Thacker,B. et al. | Automotive engineering | 1991


    Open-loop versus closed-loop control for hydraulic engine mounts

    Shoureshi, R. / Graf, P.L. / Bauchillon, S. et al. | Tema Archive | 1988