A vehicle on which a single-cylinder four-stroke engine unit which is able to stably detect the oxygen density in exhaust gas is mounted is provided. A single-combustion-chamber main catalyst 39 is at least partially positioned frontward of a crankshaft axis Cr1, and purifies the exhaust gas exhausted from one combustion chamber 29 most in an exhaust path extending from the one combustion chamber 29 to a discharge port 35e. A single-combustion-chamber upstream oxygen detector 37 is provided upstream of the single-combustion-chamber main catalyst 39 in the flow direction of the exhaust gas. The path length from the one combustion chamber 29 to the single-combustion-chamber upstream oxygen detector 37 is longer than the path length from the single-combustion-chamber upstream oxygen detector 37 to the upstream end of the single-combustion-chamber main catalyst 39.


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    Title :

    VEHICLE AND SINGLE-CYLINDER FOUR-STROKE ENGINE UNIT


    Additional title:

    FAHRZEUG UND EINZYLINDRIGE VIERTAKTMOTOREINHEIT
    VÉHICULE ET UNITÉ DE MOTEUR À QUATRE TEMPS MONOCYLINDRE


    Contributors:

    Publication date :

    2021-05-26


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES



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