The Use of a Multizone Model for Prediction of Soot and NOx Emission in a D.I. Diesel Engine as a Function of Intake Air O2 Content

2000 ◽  
Author(s):  
Zhiming Gao ◽  
Will Schreiber
Keyword(s):  
Diesel Engine ◽  
Direct Injection ◽  
Gas Injection ◽  
Exhaust Gas Recirculation ◽  
Exhaust Gas ◽  
Compression Ignition ◽  
Split Injection ◽  
Analytical Work ◽  
Multizone Model ◽  
Gas Recirculation

Abstract A phenomenological model based on the use of multiple zones is described and compared with other experimental and analytical work. This multizone model is used to examine the effect on emissions of increasing the oxygen concentration in the intake air of a compression-ignition, direct-injection engine. It is concluded that O2-enriched air could only be useful if combined with other modifications such as auxiliary gas injection, split injection, and exhaust gas recirculation.

scholarly journals Emission Characteristics under Diesel and Biodiesel Fueled Compression Ignition Engine with Various Injector Holes and EGR Conditions

Energies ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2973
Author(s):  
Taejung Kim ◽  
Jungsoo Park ◽  
Honghyun Cho
Keyword(s):  
Diesel Engine ◽  
Environmental Pollutants ◽  
Exhaust Gas Recirculation ◽  
Emission Characteristics ◽  
Exhaust Gas ◽  
Compression Ignition ◽  
Fuel Type ◽  
Compression Ignition Engine ◽  
Conventional Rail ◽  
Gas Recirculation

The combustion performance of a conventional rail diesel engine was investigated by measuring the exhaust gas with the respect to the number of injector holes, fuel type, and the use of exhaust gas recirculation (EGR), to provide a detailed reduction of environmental pollutants. It was found that a six- or seven-hole injector was more effective than a five-hole injector for reducing the exhaust gas. In addition, the mixing of 20% biodiesel oil with diesel most effectively reduced the HC and NOx contents. The technology generally reduced the NOx and CO contents of the exhaust, but had no significant effect on the HC and CO2 contents.

Experimental Investigation of the Effect of Exhaust Gas Recirculation on Lubricating Oil Degradation and Wear of a Compression Ignition Engine

2005 ◽  
Vol 128 (4) ◽  
pp. 921-927 ◽  
Author(s):  
Shrawan Kumar Singh ◽  
Avinash Kumar Agarwal ◽  
Dhananjay Kumar Srivastava ◽  
Mukesh Sharma
Keyword(s):  
Experimental Investigation ◽  
Direct Injection ◽  
Exhaust Gas Recirculation ◽  
Lubricating Oil ◽  
Exhaust Gas ◽  
Scanning Electron Micrographs ◽  
Compression Ignition ◽  
Piston Rings ◽  
Compression Ignition Engine ◽  
Gas Recirculation

This experimental investigation was aimed to investigate the effect of exhaust gas recirculation (EGR) on wear of in-cylinder engine parts. EGR setup was prepared for a two-cylinder, air-cooled, constant-speed direct-injection compression-ignition engine. Test setup was run for 96hr under predetermined loading cycles in two phases; normally, operating condition (i.e., without EGR) and with a fixed EGR rate of 25%. Addition of metallic wear debris in the lubricating oil samples drawn after regular interval from both engine operating phases was investigated. Relatively higher concentrations of all wear metals were found in the lubricating oil of the EGR-operated engine, which indicates higher wear of various engine parts. Weight loss of piston rings used in both phases was compared to quantify the amount of wear of piston rings. To quantify the amount of cylinder wear surface roughness parameters of cylinder liners were measured at three positions (top dead center, mid-stroke, and bottom dead center) on thrust and anti-thrust side. A qualitative analysis was also carried out by taking surface profiles and Scanning Electron Micrographs at same locations.

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