A microcomputer control system for managing the automotive engine’s air-fuel ratio, spark ignition timing, exhaust gas recirculation and idle speed has been developed and is marketed in Japan under the name of ECCS.By installing this system in a 1,500 kg vehicle’s 6 cylinder 2.8 liter engine, the four factors listed above have been controlled so precisely that their optimum relative calibration has been realized.As a result, fuel economy has been improved by 10% while good drivability has been maintained.This paper outlines ECCS and describes how control factors in a “steady state” are determined. It also discusses the control sequence in transient conditions, such as “cold” starts, “hot” restarts, clutch engagement, acceleration, deceleration, gearshifts and the “warm-up” process.


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    Title :

    Microprocessor Control Brings About Better Fuel Economy with Good Drivability


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    1980 Automotive Engineering Congress and Exposition ; 1980



    Publication date :

    1980-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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