The invention relates to a method of reducing cold start emissions in a series mode hybrid electric vehicle, comprising an internal combustion engine with an exhaust duct having a catalyst and an oxygen sensor downstream of the catalyst, an output of the combustion engine being connected to an electric generator with a power output of at least 10 kW, that is connected to an electric motor which is coupled to a drive shaft of two or more wheels. The method comprises the steps of:- detecting a cold start condition,- injecting fuel into the combustion engine such that combustion at a lambda value, λ, is achieved for which λ >1, preferably 1< λ < 2, more preferably at a λ of about 1.4,- running the combustion engine at a speed of 1000 rpm or higher, preferably 1500 < rpm < 4000, more preferably at a speed of about 2500 rpm,- determining if the efficiency of the catalyst reaches a predetermined first level,- setting λ to about 1 after the predetermined efficiency level of the catalyst has been reached, and- reducing the engine speed to working conditions when the catalyst efficiency reaches a predetermined second level.


    Access

    Download


    Export, share and cite



    Title :

    METHOD OF REDUCING COLD START EMISSIONS IN HYBRID ELECTRIC VEHICLES


    Additional title:

    VERFAHREN ZUR REDUZIERUNG DER KALTSTARTEMISSIONEN BEI HYBRID-ELEKTROFAHRZEUGEN
    PROCÉDÉ DE RÉDUCTION DES ÉMISSIONS DE DÉMARRAGE À FROID DANS DES VÉHICULES ÉLECTRIQUES HYBRIDES


    Contributors:

    Publication date :

    2022-11-02


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / 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



    Method of reducing cold start emissions in hybrid electric vehicles

    ALMKVIST GÖRAN / EKSTRÖM MARKUS | European Patent Office | 2023

    Free access

    Method of Reducing Cold Start Emissions in Hybrid Electric Vehicles

    ALMKVIST GÖRAN / EKSTRÖM MARKUS | European Patent Office | 2022

    Free access

    Reducing Cold-Start Emissions

    Esser, K. | Online Contents | 1995


    Hydrocarbon adsorbers for reducing cold start emissions

    Colella, C. / Caputo, D. / Iucolano, F. et al. | SAE Technical Papers | 2000


    Hydrocarbon absorbers for reducing cold start emissions

    Corbo,P. / Migliardini,F. / Caputo,D. et al. | Automotive engineering | 2000