exhaust gas recirculation
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Fuel ◽  
2022 ◽  
Vol 309 ◽  
pp. 122226
Author(s):  
Xuyang Tang ◽  
Peng Wang ◽  
Zhongyuan Zhang ◽  
Fengli Zhang ◽  
Lei Shi ◽  
...  


2022 ◽  
pp. 155-187
Author(s):  
Dhinesh Balasubramanian ◽  
Inbanaathan Papla Venugopal ◽  
Rajarajan Amudhan ◽  
Tanakorn Wongwuttanasatian ◽  
Kasianantham Nanthagopal


2022 ◽  
Vol 961 (1) ◽  
pp. 012044
Author(s):  
Miqdam T. Chaichan ◽  
Noora S. Ekab ◽  
Mohammed A. Fayad ◽  
Hayder A. Dhahad

Abstract The fuel injection timings, equivalence ratio (Ø) and exhaust gas recirculation are considered the most important parameters can effect on combustion process and lower exhaust emissions concentrations. The influence of 15% EGR technology and operating parameters (Ø and injection timing) on NOX emissions and particulate matter (PM) using oxygenated fuel (ethanol and methanol) blends were investigated in this experimental study. The results showed that the NOX emissions concentrations with increasing the equivalence ratio (Ø) and applied EGR for all fuels studied. Besides, the E10 and M10 decreased the PM concentrations compared to the diesel fuel under various equivalence ratios (Ø). The applied EGR increased the PM concentrations, but when combination of oxygenated fuels and EGR leading to the decrease in the PM formation. The NOX emissions concentrations decreased from the combined effect of EGR and oxygenated fuels by 16.8%, 22.91% and 29.5% from the combustion of diesel, M10 and E10, respectively, under various injection timings. It is indicated that NOX emissions decreased with retarded injection timings, while the PM decreased under advanced injection timings.







2022 ◽  
Vol 225 ◽  
pp. 107061
Author(s):  
Mii Betchaku ◽  
Yoshinao Nakagawa ◽  
Masazumi Tamura ◽  
Mizuho Yabushita ◽  
Yasutomo Miura ◽  
...  


2021 ◽  
Vol 15 (5) ◽  
Author(s):  
Vittorio Ravaglioli ◽  
Fabrizio Ponti ◽  
Giacomo Silvagni ◽  
Davide Moro ◽  
Federico Stola ◽  
...  


Machines ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 7
Author(s):  
Diming Lou ◽  
Guokang Lou ◽  
Bo Wang ◽  
Liang Fang ◽  
Yunhua Zhang

Exhaust gas recirculation (EGR) can improve the fuel economy of gasoline direct-injection (GDI) engines, but at the same time it will have a significant impact on emissions. In this paper, the effects of low-pressure exhaust gas recirculation (LP-EGR) and its rate on the main gaseous and particulate emission characteristic of a GDI engine were investigated. The results showed that the particle size distribution of the GDI engine presented bimodal peaks in nucleation and accumulation mode, and the nucleation mode particles comprised the vast majority of the total particles. The effect of LP-EGR on emissions depended on the engine conditions. At low and medium speed, the particle emissions increased with the increase in the EGR rate, while at high speed, a reduction in the particle emission was observed. When the engine operated in full load condition, an increase in the EGR rate reduced the particle number (PN) concentration significantly, but increased the particle mass (PM) concentration. In terms of the gaseous emission, the EGR could reduce as much as 80% of the NOx emission; however, the total hydrocarbons (THC) emission presented an increased trend, and the maximum increase reached 23.5%. At low and medium loads, the EGR could reduce the CO emission, but at high load, the CO emission worsened with the EGR.



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