New Concept on Lower Exhaust Emission of Diesel Engine

Paper #:
  • 952062

Published:
  • 1995-09-01
Citation:
Fujimoto, H., Senda, J., Shibata, I., and Matsui, K., "New Concept on Lower Exhaust Emission of Diesel Engine," SAE Technical Paper 952062, 1995, https://doi.org/10.4271/952062.
Pages:
16
Abstract:
One of countermeasures for exhaust emissions from a diesel engine, especially, DI diesel engine, is the use of a super high pressure injection system with a small hole diameter. However, the system needs greater driving force than that with normal injection pressure, and its demerit is increase in NOx, although soot is decreasing. Then, authors propose the new concept on the simultaneous reduction of NOx and soot. The concept is that the utilization of flash boiling phenomenon in a diesel engine. The phenomenon can be realized by use of the injection of fuel oil with CO2 gas dissolved. Flash boiling facilitates the distinguished atomization of fuel oil and CO2 gas contributes to realizes the internal EGR during combustion. Fundamental information on the characteristics of a flash boiling spray of n-tridecane with CO2 gas dissolved is described in this paper, as a first step.
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