抄録
In the past decade,high-pressure direct injection systems in petrol engines have widely penetrated in the market supported by the raising environmental consciousness.The essential component of a gasoline direct injection system is the high-pressure fuel pump,which pressurizes the petrol as high as 20MPa High-pressure fuel pump commonly used is smgle-cylinder type driven mechanically by the cam-shaft.This typically generates inherent undesirable high pressure pulsation noise which renders the sound of the traditionally petrol engine similar to that of a common-rail diesel engine.In this paper,we will describe the method we deployed to mitigate the high pressure pulsation noise.We applied Taguchi methodology to search for the sensitive design parameters.As a result,by modifying design parameters of the outlet valve,we confirmed 48% reduction of pulsation noise.
