Effect of injection timing on particle size distribution from a diesel engine

The use of a variety of means of control in the engine combustion temperature in the low load has been more widely used. Although the opacity of the filter paper on smoke (FSN) was used as a standard in many laboratories PM quality parameters measured, but cannot be measured under different conditions the engine size and number of particles in a major change, especially in smaller size The particles on the human body more dangerous trends. So a study of particle size distribution of a heavy diesel engine emission was investigated under the condition of different intake valve closing timing, different EGR, different injection timing and multiple injections.

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Study of Particle Size Distribution Emitted From a Diesel Engine by Diesel and Biodiesel-Diesel Blends Fuels

Volume 2: Fuels; Numerical Simulation; Engine Design, Lubrication, and Applications ◽

10.1115/icef2013-19222 ◽

2013 ◽

Author(s):

Xiaobei Cheng ◽

Liang Chen ◽

Fangqin Yan ◽

Guohua Chen

Keyword(s):

Particle Size ◽

Diesel Engine ◽

Particle Size Distribution ◽

Size Distribution ◽

Diesel Fuel ◽

Number Concentration ◽

High Load ◽

Injection Timing ◽

Biodiesel Blends ◽

Biodiesel Blend

The effect of diesel and biodiesel blends on particle size and number concentration distributions were studied in diesel engine under different operating conditions, including speeds, loads, and injection timing. The results showed that the engine load was more influential on particle size distribution than the engine speed. At the high load, diesel fuels produced mainly accumulation-mode particles, and at medium or lower load, diesel fuel produced more nuclei-mode particles. The injection timing had obviously influence on particle size distribution and number concentration. Advanced injection timing induced higher number concentrations of nuclei-mode particles for the low load and more accumulation mode particles for high load. Compared to the neat diesel fuel, the combustion process was improved when fueled with diesel-biodiesel blends. The oxygen contained in the biodiesel fuel may improve combustion. The number and mass concentration of PM was greatly decreased with the increase in biodiesel blend ratio. Biodiesel blends had an early start of injection, and particle size distributions tended to be ultra-fine particles with the increase in the ratio of biodiesel blend. The average mid-diameter range of particles was significantly affected by the change in fuel injection timing.

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Effect of injection timing on particle size distribution of a diesel engine fueled with biodiesel-diesel blends

E3S Web of Conferences ◽

10.1051/e3sconf/202130201004 ◽

2021 ◽

Vol 302 ◽

pp. 01004

Author(s):

Theeranan Phatai ◽

Raschanon Kumpiranon ◽

Kritsana Ounnarut ◽

Nattapol Pongrasri ◽

Pubet Meenaroch ◽

...

Keyword(s):

Particle Size ◽

Diesel Engine ◽

Particle Size Distribution ◽

Size Distribution ◽

Engine Speed ◽

Particle Concentration ◽

Fuel Injection ◽

Combustion Efficiency ◽

Injection Timing ◽

Black Smoke

The purpose of this study is to investigate injection timing affected particle size distribution of a diesel engine fueled with biodiesel/diesel blends. The biodiesel blending ratios include 7, 10 and 20%vol. The experiments were operated at engine speed 1,500 rpm under 25, 50 and 75% engine loads and two different injection timing (25.5 CAD BTDC and 27.5 CAD BTDC). The effects of biodiesel addition and injection timing on the changes in black smoke and particle size distribution were discussed. Results showed that the standard injection timing for the addition of biodiesel, especially for 20% biodiesel blended with diesel fuel (B20) had a significant effect of increasing particle concentration and thus black smoke emission. The advanced injection timing for B20 could improve combustion efficiency and reduce small particles emission in nucleation-mode (Dp 5 – 50 nm) and particles in accumulation-mode (Dp 50 – 1,000 nm) became the smaller particle size, compared to standard and retarded injection timing. Moreover, the oxygen content in biodiesel could improve combustion efficiency and reduce the emission but it is necessary to modify the engine especially fuel injection timing.

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