Sökning: "Akichika Yamaguchi"

Hittade 2 avhandlingar innehållade orden Akichika Yamaguchi.

1. 1. Experimental Investigation of ultra-high fuel injection pressure spray for GDI engines

   Författare :Akichika Yamaguchi; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Spray; Spray imaging; Air entrainment; High Pressure; PIV; Spray tip penetration; GDI engine; PDI; drolet size;

   Sammanfattning : Gasoline Direct Injection Engines (GDI) for passenger cars currently use fuel injection systems operating at pressures of up to 350 bar. Injection pressures have increased over time, and there is evidence that particulate emissions could be reduced by raising them further, up to 500 bar. LÄS MER

3. 2. Ultra-High Pressure Spray for Gasoline Direct Injection Engines

   Författare :Akichika Yamaguchi; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; particulate emission.; gasoline direct injection engine; gasoline spray; high pressure spray; GDI;

   Sammanfattning : There is an increasingly urgent need for vehicle manufacturers to reduce emissions from passenger vehicles to protect the environment and comply with increasingly stringent emissions standards such as Euro 6d, which came into force in January 2021, and Euro 7, which will probably come into force around 2025. Current emissions standards limit passenger vehicles' particulate number emissions to at most 6*10^{11} [#/km], making it necessary to find ways of reducing the engine-out particulate emissions of gasoline direct injection engines to meet this requirement. LÄS MER