scholarly journals Effects of Emulsified Fuel, Fuel Injection Control and EGR that Uses Exhaust Gas from Gas Engine on Emission Characteristics of Marine Diesel Engine

2017 ◽  
Vol 52 (5) ◽  
pp. 666-674 ◽  
Author(s):  
Sumito Nishio ◽  
Dong-Hoon Yoo ◽  
Yoshifuru Nitta ◽  
Yasuhisa Ichikawa
Keyword(s):  
Diesel Engine ◽  
Fuel Injection ◽  
Emission Characteristics ◽  
Marine Diesel Engine ◽  
Exhaust Gas ◽  
Gas Engine ◽  
Emulsified Fuel ◽  
Marine Diesel ◽  
Injection Control

scholarly journals Exhaust Emission Characteristics of a Marine Diesel Engine with an Electronically Controlled Fuel Injection System

2000 ◽  
Vol 35 (12) ◽  
pp. 841-847
Author(s):  
Jie Zhang ◽  
Yoshio Takasugi ◽  
Magoshirou Kuwabara ◽  
Masaaki Kikuchi ◽  
Sumito Nishio ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Fuel Injection ◽  
Injection System ◽  
Exhaust Emission ◽  
Emission Characteristics ◽  
Fuel Injection System ◽  
Marine Diesel Engine ◽  
Marine Diesel

scholarly journals Effect of Fuel Injection Control on Vegetable Oil Combustion in Marine Diesel Engine

2011 ◽  
Vol 46 (2) ◽  
pp. 252-256 ◽  
Author(s):  
Zhide Xu ◽  
Sumito Nishio ◽  
Masaru Ikame ◽  
Magoshiro Kuwabara
Keyword(s):  
Diesel Engine ◽  
Vegetable Oil ◽  
Fuel Injection ◽  
Marine Diesel Engine ◽  
Marine Diesel ◽  
Injection Control

Evaluation of Emissions Characteristics of Marine Diesel Engine Intake of Exhaust Gas of Lean Burn Gas Engine

2017 ◽  
Vol 140 (2) ◽  
Author(s):  
Yoshifuru Nitta ◽  
Dong-Hoon Yoo ◽  
Sumito Nishio ◽  
Yasuhisa Ichikawa ◽  
Koichi Hirata ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Natural Gas ◽  
Co2 Emissions ◽  
Exhaust Gas Recirculation ◽  
Marine Diesel Engine ◽  
Exhaust Gas ◽  
Lean Burn ◽  
Gas Engine ◽  
Marine Diesel ◽  
Gas Recirculation

The need for reductions of nitrogen oxides (NOx), sulfur oxides (SOx), and carbon dioxide (CO2) emissions has been acknowledged on the global level. However, it is difficult to meet the strengthened emissions regulations by using the conventional marine diesel engines. Therefore, lean burn gas engines have been recently attracting attention in the maritime industry. Because they use natural gas as fuel and can simultaneously reduce both NOx and CO2 emissions. On the other hand, since methane is the main component of natural gas, the slipped methane, which is the unburned methane emitted from the lean burn gas engines, might have a potential impact on global warming. The authors have proposed a combined exhaust gas recirculation (C-EGR) system to reduce the slipped methane from the gas engines and NOx from marine diesel engines by providing the exhaust gas from lean burn gas engine to the intake manifold of the marine diesel engine using a blower. Since the exhaust gas from the gas engine includes slipped methane, this system could reduce both the NOx from the marine diesel engine and the slipped methane from the lean burn gas engine simultaneously. This paper introduces the details of the proposed C-EGR system and presents the experimental results of emissions characteristics on the C-EGR system. As a result, it was confirmed that the C-EGR system attained more than 75% reduction of the slipped methane in the intake gas. Additionally, the NOx emission from the diesel engine decreased with the effect of the exhaust gas recirculation (EGR) system.

Evaluation of Emissions Characteristics by Charging Exhaust Gas From Lean Burn Gas Engine Into Marine Diesel Engine

2016 ◽  
Author(s):  
Yoshifuru Nitta ◽  
Dong-Hoon Yoo ◽  
Sumito Nishio ◽  
Yasuhisa Ichikawa ◽  
Koichi Hirata ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Natural Gas ◽  
Co2 Emissions ◽  
Diesel Engines ◽  
Marine Diesel Engine ◽  
Exhaust Gas ◽  
Maritime Industry ◽  
Lean Burn ◽  
Gas Engine ◽  
Marine Diesel

Reductions of Nitrogen oxides (NOx), sulphur oxides (SOx) and carbon dioxide (CO2) emissions have been acknowledged on the global level. The International Maritime Organization (IMO) has developed some mandatory or non-mandatory instruments such as codes, amendments, recommendations or guidelines to strengthen the emissions regulations on ships engaged in international voyage. However, it is difficult to meet the strengthened emissions regulations on the conventional marine diesel engines. Lean burn gas engines have been thus recently attracting attention in the maritime industry. The lean burn gas engines use natural gas as fuel and can simultaneously reduce both NOx and CO2 emissions. On the other hand, since methane is the main component of natural gas, the slipped methane which is the unburned methane emitted from the lean burn gas engines might have a potential impact on global warming. The authors investigated on a ship installed conventional marine diesel engines and lean burn gas engines, and have proposed a C-EGR (combined exhaust gas recirculation) system to reduce the slipped methane from the gas engines and NOx from marine diesel engines. This system consists of a marine diesel engine and a lean burn gas engine, and the exhaust gas emitted from the lean burn gas engine is provided to the intake manifold of the marine diesel engine by a blower installed between both engines. Since exhaust gas from the gas engine including slipped methane, this system could reduce both the NOx from the marine diesel engine and the slipped methane from the lean burn gas engine simultaneously. This paper introduces the details of the proposed C-EGR system, and presents the experimental results of emissions and engine performance characteristics on the C-EGR system. In the experiment, the diesel engine was operated at three load conditions of 25, 50 and 75% along with the propeller load curve. In order to keep the slipped methane concentration constant, the gas engine was operated at a constant load condition of 25%. The intake exhaust gas quantity which is supplied to the diesel engine was adjusted by the blower speed. As a result, it was confirmed that the C-EGR system attained more than 75% reduction of the slipped methane in the intake gas. In addition, the NOx emission from the diesel engine decreased with the effect of the EGR system. Also the fuel consumption of the diesel engine did not increase, because of the methane combustion in the intake gas.

scholarly journals The influence of fuel injection pump malfunctions of a marine 4-stroke Diesel engine on composition of exhaust gases

2016 ◽  
Vol 167 (4) ◽  
pp. 53-57
Author(s):  
Joanna LEWIŃSKA
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Thermodynamic Parameters ◽  
Laboratory Study ◽  
Fuel Injection ◽  
Marine Diesel Engine ◽  
Fuel Pump ◽  
Engine Cylinder ◽  
Marine Diesel ◽  
Fuel Leakage

The article presents results of a laboratory study on exhaust gas emission level from a marine diesel engine. The object of the laboratory study was a four-stroke marine diesel engine type Al 25/30 Sulzer, operated at a constant speed. The examination on the engine was carried out according to regulations of the Annex VI to MARPOL 73/78 Convention. The laboratory study consisted of 3 observations: the engine assumed to be operating without malfunctions, delay of the fuel injection by 5° of crankshaft angle in the second engine cylinder, and the leakage of the fuel pump on the second engine cylinder. Additionally, parameters of fuel consumption and thermodynamic parameters of the marine engine were measured during the research. Simulated malfunctions caused changes in total weighed NOx, CO, and CO2 emissions for all considered engine loads. All simulated malfunctions caused a small change in measured thermodynamic parameters of the engine. The engine operation with the delayed fuel injection and the fuel leakage in the fuel pump in one cylinder caused a decrease of NOx and CO emission level. Fuel leakage in the fuel pump causes the CO2 emission to decrease only at low engine load. Calculations of the weighed specific fuel consumption present a 1-2% change in the engine efficiency.

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