Methods and systems are provided for controlling hybrid vehicle engine operation, where the vehicle engine comprises one or more cylinders dedicated to recirculating exhaust to an intake manifold. In one example, during an engine cold-start event or other event where temperature of one or more exhaust catalysts are below a temperature needed for catalytic activity, fuel injection to the dedicated exhaust gas recirculation cylinder(s) is maintained shut off, while its intake and exhaust valves are maintained activated, thus enabling the dedicated exhaust gas recirculation cylinder(s) to route air to the intake manifold of the engine, resulting in exhaust gas lean of stoichiometry that may serve to heat the catalyst. In this way, during cold start events and other events where temperature of one or more exhaust catalysts are below a temperature for catalytic activity, combustion stability issues may be avoided, and exhaust catalyst(s) rapidly heated, thereby reducing undesired tailpipe emissions.


    Access

    Download


    Export, share and cite



    Title :

    SYSTEM AND METHODS FOR IMPROVING FUEL ECONOMY


    Contributors:

    Publication date :

    2017-10-26


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen / F02M Zuführen von Brennstoff-Luft-Gemischen oder deren Bestandteilen bei Brennkraftmaschinen allgemein , SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF



    System and methods for improving fuel economy

    LEONE THOMAS G / MILLER KENNETH JAMES / MARTIN DOUGLAS RAYMOND | European Patent Office | 2018

    Free access

    System and methods for improving fuel economy

    LEONE THOMAS G / MILLER KENNETH JAMES / MARTIN DOUGLAS RAYMOND | European Patent Office | 2018

    Free access

    SYSTEM AND METHODS FOR IMPROVING FUEL ECONOMY

    LEONE THOMAS G / MILLER KENNETH JAMES / MARTIN DOUGLAS RAYMOND | European Patent Office | 2017

    Free access

    Comparing alternative methods of improving fuel economy

    Luchter,S. / Daye,C.J. / Dep.of Transp.,US et al. | Automotive engineering | 1977


    Improving automobile fuel economy

    Hickman,A.J. / Waters,M.H. / Transp. and Road Res.Lab.,Berkshire,GB | Automotive engineering | 1993