HCCI Operation of a Dual-Fuel Natural Gas Engine for Improved Fuel Efficiency and Ultra-Low NOx Emissions at Low to Moderate Engine Loads

2001 ◽  
Author(s):  
Rudolf H. Stanglmaier ◽  
Thomas W. Ryan ◽  
Jason S. Souder
Keyword(s):  
Natural Gas ◽  
Fuel Efficiency ◽  
Dual Fuel ◽  
Nox Emissions ◽  
Gas Engine ◽  
Natural Gas Engine

Impact of natural gas injection strategies on combustion and emissions of a dual fuel natural gas engine ignited with diesel at low loads

Fuel ◽  
2020 ◽  
Vol 260 ◽  
pp. 116414 ◽  
Author(s):  
Jinwen You ◽  
Zhongchang Liu ◽  
Zhongshu Wang ◽  
Dan Wang ◽  
Yun Xu
Keyword(s):  
Natural Gas ◽  
Gas Injection ◽  
Dual Fuel ◽  
Gas Engine ◽  
Natural Gas Engine ◽  
Injection Strategies

Achieving Fast Catalyst Light-Off from a Heavy-Duty Stoichiometric Natural Gas Engine Capable of 0.02 g/bhp-hr NOX Emissions

2018 ◽  
Author(s):  
Ian Smith ◽  
James Chiu ◽  
Gordon Bartley ◽  
Eugene Jimenez ◽  
Thomas Briggs ◽  
...  
Keyword(s):  
Natural Gas ◽  
Nox Emissions ◽  
Heavy Duty ◽  
Gas Engine ◽  
Natural Gas Engine

Experimental investigation and combustion analysis of a direct injection dual-fuel diesel–natural gas engine

Energy ◽  
2008 ◽  
Vol 33 (2) ◽  
pp. 256-263 ◽  
Author(s):  
A.P. Carlucci ◽  
A. de Risi ◽  
D. Laforgia ◽  
F. Naccarato
Keyword(s):  
Experimental Investigation ◽  
Natural Gas ◽  
Direct Injection ◽  
Dual Fuel ◽  
Combustion Analysis ◽  
Gas Engine ◽  
Natural Gas Engine

An Experimental-Numerical Approach to Reduce Emissions of a Dual Fuel Diesel-Natural Gas Engine

2009 ◽  
Author(s):  
S. Cordiner ◽  
V. Mulone ◽  
V. Rocco ◽  
R. Scarcelli ◽  
S. Iannaccone ◽  
...  
Keyword(s):  
Natural Gas ◽  
Numerical Approach ◽  
Dual Fuel ◽  
Gas Engine ◽  
Natural Gas Engine ◽  
Reduce Emissions

scholarly journals Micro-pilot-induced Ignition Diesel/ Natural Gas Engine Control System Development and Engine Performance /Emission Optimization

2018 ◽  
Author(s):  
G Zhao
Keyword(s):  
Control System ◽  
Natural Gas ◽  
Gas Injection ◽  
Injection Pressure ◽  
Dual Fuel ◽  
Injection Timing ◽  
Gas Engine ◽  
Natural Gas Engine ◽  
Driving Circuit ◽  
Injection Ratio

Diesel/natural gas dual fuel engine is acquiring more and more attention due to its potential to reduce NOX and soot emission simultaneously. Micro-pilot-induced diesel ignition natural gas engine is a popular manner to further improve the emission reduction capability of dual fuel engine. A six cylinder, four stroke, commonrail diesel engine is converted into dual fuel engine. Natural gas is injected into the intake manifold after the throttle. Five gas injection valves are used to control natural gas flow rate. Based to the established fuel supply system, a dual fuel control system is developed by using MS9S12XEP100 MCU. Voltage boosting circuit, fuel injector driving circuit, gas injection valve driving circuit and MeUn driving circuit are integrated on the platform of MCU hardware. Two ECU is connected to each other by CAN bus and several I/O ports to fulfil the fuel injection functional requirement. A software framework involves gas injection timing synchronization, fuel mode managing, multi-time injection. A MAP based fresh air mass flow rate and intake charge efficiency model is integrated in the MCU to calculate the fresh air quality in cylinder. The last part is performance optimization research at low load. Ignition diesel is divided into two stages, and the first injection timing, first injection ratio and injection pressure are used as controllable parameter to reduce NOX and HC emission. Experimental result reveal that by dividing ignition injection into two stage and advancing first injection to 60°CA BTDC CH4 emission can be reduced by 77% while NOX remains unchanged. Increasing the first injection ratio and injection pressure can also reduce THC emission. If injection pressure is higher than 75MPa, the effect of HC reduction effect is not that obvious. Experimental results shows that developed control system can accomplish the functional requirements of dual fuel engine management. Emission test results demonstrate that IMO TierII can be satisfied at diesel mode. DF mode emission performance can meet the requirement of IMO TierIII. Furthermore, as the first domestic product dual fuel dedicated control system, which has passed through the CCS authentication in China, the engine emission level can meet the current and upcoming China’s emission standard on non-road engine on the premise of guaranteeing engine power and economy.

scholarly journals The Study on Dual Fuel Spray and Characteristics of Combustion of Diesel, Natural Gas and Dual Fuel

2018 ◽  
Vol 1 (1) ◽  
pp. 14-30
Author(s):  
Tasneem Abdalla Tasneem Abdalla ◽  
Tasneem Abdalla Tasneem Abdalla ◽  
Qian Wang ◽  
Qian Wang ◽  
Tan Xiaoqiang ◽  
...  
Keyword(s):  
Natural Gas ◽  
Heat Production ◽  
Diesel Fuel ◽  
High Speed ◽  
Initial Pressure ◽  
Dual Fuel ◽  
Schlieren Method ◽  
Gas Engine ◽  
Natural Gas Engine ◽  
Combustion Emissions

Combustion of fossil fuels provides around 88% of total energy supply for modern society, and meanwhile causes many environ mental problems and social problems such as air pollution and energy crisis. Therefore，both at home and abroad are focusing on the research and development of natural gas engine recently. However, the mass production and application of this kind of engine are restricted by some unsolved technical difficulties. This paper explored the injection, combustion and emission processes of diesel/ natural gas and dual fuel engine based on Chemkin II, Fire software and Schlieren method. The experimental study on the mixing process of dual fuel jet was carried out by using high-speed Schlieren method in a constant volume bomb. Based on the Fire software, and then applied to Chemkin II software to analyze the effect of the initial temperature and pressure on the net heat production and combustion emissions. The results show that Dual fuel mechanism is capable of producing different heat production behaviors when varying the initial pressure and temperature CO2 emissions are minimized by changing the initial pressure above or below the atmospheric value. However, CO emissions are peaked when diesel fuel is used. The dual fuel engine minimizes the CO emissions amount caused by diesel fuel. Increasing the initial pressure eliminates dual fuel CO2 combustion emissions. The research of this paper is important to optimize the in cylinder combustion processes of natural gas engine, and have a certain important meaning to guide the development of diesel ignition dual fuel engine.

Experience With Gas Engines Optimized for H2-Rich Fuels

2003 ◽  
Author(s):  
G. R. Herdin ◽  
F. Gruber ◽  
D. Plohberger ◽  
M. Wagner
Keyword(s):  
Natural Gas ◽  
Fuel Efficiency ◽  
Electrical Power ◽  
Nox Emissions ◽  
Engine Emissions ◽  
Lean Burn ◽  
Good Efficiency ◽  
Gas Engine ◽  
Natural Gas Engines ◽  
Fuel Technology

The gas engine is a very efficient possibility of a technological approach for the conversion of chemically bound energy into mechanical or electrical power. Degrees of efficiency achieved thus far through the electrification of natural gas amount to up to 45% depending on the engine size and further potentials are already being opened up. Gas engines therefore do not need to fear a comparison with diesel engines in terms of efficiency. The modern gas engines have considerable advantages regarding emissions. The state of the art for the NOx emissions of natural gas engines can presently be given as 0.7 g/kWh (diesel 5 g NOx/kWh) with practically particle-free combustion. As a result of these features the gas engine is especially suitable for the very efficient process of cogeneration of heat and power, through which total degrees of fuel efficiency of about 90% can be attained. As such, the gas engine is even superior to all previously introduced types of fuel cells. The utilization of H2-rich gases as fuel can be seen as a new field of application of gas engines. Jenbacher AG already has many years of experience in the field of “H2-rich fuels” with optimization of combustion control and mixture formation. The H2 content extend from 100% to very low caloric values of gases in the range of 1.67 MJ/Nm3. The gases to be utilized by the gas engines come primarily from thermal pyrolysis processes of biomass or RDF fuels. A very good efficiency behavior with uncommonly low NOx emissions can be determined as the common result of all gas engine sizes. In the case of the high NH3 content of e.g. wood gas, despite the extreme lean-burn operation through the primary formation of NOx from the fuel, no NOx minimum can be attained. For the future, making the step into H2-rich fuel technology particularly regarding emissions means a big step towards the low NOx concepts and thus the further reduction of engine emissions.

Effect of Double-Layer Hole Nozzle with Narrow Spray Angle on Combustion and Emissions in Dual-Fuel Natural Gas Engine

2021 ◽  
Author(s):  
Jinbao Zheng ◽  
Zhoayang Hao ◽  
DuiDui Wang ◽  
Yage Di ◽  
Haiyong Peng ◽  
...  
Keyword(s):  
Natural Gas ◽  
Double Layer ◽  
Spray Angle ◽  
Dual Fuel ◽  
Gas Engine ◽  
Natural Gas Engine

Improvement of Performance and Exhaust Emissions in a Converted Dual-Fuel Natural Gas Engine

2000 ◽  
Author(s):  
Takuji Ishiyama ◽  
Masahiro Shioji ◽  
Shin-ichi Mitani ◽  
Hiroaki Shibata ◽  
Makoto Ikegami
Keyword(s):  
Natural Gas ◽  
Exhaust Emissions ◽  
Dual Fuel ◽  
Gas Engine ◽  
Natural Gas Engine
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