Low Speed Hunting of the Pneumatically Governed Compression-ignition Engine : 4th Report, Effect of Simulated Venturi Diameter on Phase Lag of the Fuel Control Rack Response

Abstract

The effect of venturi diameter on phase lag of the fuel control rack response has been investigated using 5 kinds of simulated venturis, which are different in size but similar in shape of flow passage to the actual subventuri, installed in an apparatus simulating the intake air flow at hunting or in a hunting engine intake system. The results show that the phase difference between subventuri pressure and suction pressure depends on the difference of ascribed to the phase lag of the reduced pressure at subventuri. Furthermore, this study provides a preventive measure against hunting.