An Insight Into Effect of Split Injection on Mixture Formation and Combustion of DI Gasoline Engines

Tie Li; Keiya Nishida; Yuyin Zhang; Masahisa Yamakawa; Hiroyuki Hiroyasu

doi:10.4271/2004-01-1949

2004-06-08

An Insight Into Effect of Split Injection on Mixture Formation and Combustion of DI Gasoline Engines 2004-01-1949

In the previous study of the authors, it was found that some benefits for the mixture preparation of DI gasoline engines can be offered by splitting the fuel injection, such as the phenomenon of high density liquid phase fuel piling up at the leading edge of the spray can be circumvented. In a further analysis, the vapor quantity in the “stable operating” range (equivalence ratio of vapor ϕ_v in a range of 0.7≤ϕ_v≤1.3) was significantly increased by the split injection compared to the single injection.

In this work, the mechanism of the effect of the split injection on the mixture formation process was studied by combining the laser-sheet imaging, LIF-PIV and the LAS (Laser Absorption Scattering) technique. As a result, it is found that the spray-induced ambient air motion can help the formation of the more combustible mixture of the split injection whereas it played a minus role of diluting the spray by the single injection.

Finally, the experiments on a wall-guided-type DI gasoline engine were done. The engine performance and exhaust emissions were presented and discussed.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Digital $37.00 Print $37.00

Preview Document

We also recommend:

Standards

SAE Mobilus®

Publications

News

Events

Professional Development

A World in Motion (PreK-12)

Participate with SAE

SAE Membership

Donate

An Insight Into Effect of Split Injection on Mixture Formation and Combustion of DI Gasoline Engines 2004-01-1949

SAE MOBILUS