SPARK-IGNITION INTERNAL COMBUSTION ENGINE

摘要

1536747 Recirculating exhaust gases; sparkplug arrangements NISSAN MOTOR CO Ltd 11 May 1976 [15 May 1975] 19401/76 Heading F1B A spark ignition I.C. engine having means for recirculating exhaust gases comprises a plurality of spark-plugs per cylinder, there being one spark-plug per 15 to 40 cc of combustion chamber volume when a piston bounding the chamber is at TDC. Exhaust gas may be recirculated to the extent of 12 to 40 per cent by volume of the intake air via a conduit 28 with a control valve 32 which may be responsive to carburettor Venturi vacuum. A reactor 25 is provided for oxidizing carbon monoxide and unburned hydrocarbons. The spark-plugs may ignite simultaneously or their spark timings may be different from each other.