Study of the In-Line Pump System for Diesel Engines to Meet Future Emission Regulations

1998 ◽  
Author(s):  
Katsunori Furuta ◽  
Shinobu Sasaki ◽  
Michihiro Tokuda
Keyword(s):  
Diesel Engines ◽  
Pump System ◽  
Emission Regulations ◽  
Future Emission

MAHLE Advanced EGR Systems for Commercial Diesel Engines to Meet Future Emission Demands

2007 ◽  
Author(s):  
Marco Warth ◽  
Boris Lerch ◽  
Adam Loch ◽  
Alfred Elsaesser
Keyword(s):  
Diesel Engines ◽  
Operating Conditions ◽  
Intake Manifold ◽  
Emission Regulations ◽  
Technical Advances ◽  
Future Emission ◽  
Heavy Duty Diesel ◽  
Low Torque ◽  
Key Aspects ◽  
Fast Acting

Given the ever more stringent emission regulations modern diesel engines undergo these days, the need for advanced EGR systems becomes crucial in all major applications, in particular on- & off-road commercial diesel engines. One of the key aspects of these so-called advanced EGR systems thereby is to reliably provide the engine with the appropriate, high amounts of EGR over the entire range of operating conditions. Whereas common systems are either optimized for low-torque/low-speed operating conditions, or a narrow range around one specific engine speed, the advanced systems aim to both cover the entire operating range and significantly increase the current level of EGR. The advanced EGR systems developed at MAHLE make use of two types of fast acting devices in a modular approach. Depending on the engine size/layout and the amount of EGR needed, the devices are either placed directly in the EGR line or the intake manifold. Using the latest technical advances in mechatronics, the oscillating valves can be opened or closed within less than 3ms, which makes it not only possible to accurately control the amount of EGR fed back into the engine, it also allows to boost the amount of EGR using the exhaust pressure oscillations. In addition to these oscillating valves, rotational flaps have been developed to significantly reduce the complexity of the systems, while still offering similar benefits in terms of EGR rates and variability. Shown hereafter are the results from thorough investigations conducted on both European and US heavy-duty diesel engines. Focusing on some of the most common engine characteristics, such as EGR rates, emissions of nitrogen oxide and fuel consumption, significant benefits can be seen using the newly developed technologies. Compared to conventional measures, such as increased exhaust backpressure and/or constant charge-air throttling, the advanced systems prove to be both more efficient and flexible in terms of EGR rates, as well as beneficial regarding some of the most important engine characteristics.

Possibilities to Achieve Future Emission Limits for HD DI Diesel Engines Using Internal Measures

2005 ◽  
Author(s):  
D. T. Hountalas ◽  
G. C. Mavropoulos ◽  
T. C. Zannis ◽  
V. Schwarz
Keyword(s):  
Diesel Engines ◽  
Future Emission ◽  
Emission Limits

Influence of Renewable Gas Addition to Natural Gas on the Combustion Performance of Cooktop Burners

2018 ◽  
Author(s):  
Yan Zhao ◽  
Shiny Choudhury ◽  
Vincent McDonell
Keyword(s):  
Carbon Dioxide ◽  
Natural Gas ◽  
Gas Composition ◽  
Combustion Performance ◽  
Emission Regulations ◽  
Future Emission ◽  
Overall Performance ◽  
Similarities And Differences ◽  
Testing Standards ◽  
Insight Into

This paper investigates the combustion performance of a commercial cooktop burner operating on natural gas and renewable biogas. Various blends of carbon dioxide and methane are used to simulate biogas and fed as fuel to the cooktop burners. Combustion operation on standard pipeline natural gas is taken as a reference for comparison with other fuel classes. In this study, different configurations of cooktop burners available in the market were investigated to establish similarities and differences. Based on the current regulations and testing standards, a protocol for testing and evaluating the cooktop burner combustion performance was generated and adopted in this research. Experimental investigation of the flame characteristics, ignition properties, cooking efficiency, and emissions (CO, NOx, UHC) were studied as a function of gas composition. The results indicate that, based on the overall performance of the cooktop burners, up to 5% CO2 can be added to pipeline natural gas without impacting operation. Different methodologies of analyzing emissions were compared with each other, which can provide insight into future emission regulations on open-air residential or light industrial burners.

Injection Pressures of a Bio-Oil Driven Non-Road Diesel Engine: Experiments and Simulations

2012 ◽  
Author(s):  
Seppo Niemi ◽  
Jukka Kiijärvi ◽  
Mika Laurén ◽  
Erkki Hiltunen
Keyword(s):  
High Pressure ◽  
Diesel Engine ◽  
Diesel Engines ◽  
Injection Pressure ◽  
Injection System ◽  
Pump System ◽  
Engine Operation ◽  
Injection Pump ◽  
Bio Oil ◽  
Injection Pressures

The depletion of global crude oil reserves, increases in fossil fuel prices and environmental issues have encouraged the search for and study of bio-derived fuels. For years, fatty acid methyl esters (FAME) have already been used successfully. High-quality hydrogenated vegetable oil and Fischer-Tropsch biofuels have also been developed. Fuel refining processes, however, consume energy increasing CO2 emissions. For profitability reasons, large-scale industrial production is also required. Several distributed energy producers are instead willing to utilize various local waste materials as fuel feedstock. The target is local fuel production without any complicated manufacturing processes. Crude bio-oils are therefore also interesting fuel options, in particular for medium-speed diesel engines capable of burning such bio-oils without any major problems. Nevertheless, waste-derived crude bio-oils have also been studied in Finland in high-speed non-road diesel engines. One option has been mustard seed oil (MSO). Mustard has been cultivated in fallow fields. Non-food mustard seeds have been used for fuel manufacturing. In the performed studies with MSO, the exhaust smoke and HC emissions decreased, NOx remained approximately constant, and the thermal efficiency was competitive compared with operation on ordinary diesel fuel oil (DFO). The number of exhaust particles tended, however, to increase and deposits were formed in the combustion chamber, particularly if the engine was also run at low loads with MSO. On the whole, the results were so promising that deeper analyses of engine operation with MSO were considered reasonable. The kinematic viscosity of crude bio-oils is much higher than that of FAMEs or DFO. Consequently, the injection pressure tends to increase especially at the injection pump side of an in-line injection pump system. The flow characteristics of crude bio-oil also differ from those of DFO in the high-pressure pipe. With bio-oil, the flow seems to be laminar. The bulk modulus of bio-oils is also different from that of DFO affecting the rate of the injection pressure rise. In the present study, a turbocharged, inter-cooled direct-injection non-road diesel engine was driven with a mixture of MSO (95%) and rape seed methyl ester (RME, 5%), and standard DFO. The engine was equipped with an in-line injection pump. First, the injection pressures at pump and injector ends of the high-pressure injection pipe were measured for both fuels as a function of crank angle. Furthermore, a model was created for the injection system based on the method of characteristics. Free software called Scilab was adopted for numerical simulation of the model. Despite a few limitations in the built model, the results showed clear trends and the model can be used to predict changes in the fuel injection process when the fuel is changed.

Progress on Denitration and Desulfuration Technologies for Marine Diesel Engines

2015 ◽  
Vol 713-715 ◽  
pp. 51-56
Author(s):  
Ya Qiong Liu ◽  
Jia Zhen Du ◽  
Pi Qiang Tan ◽  
Ai Min Du
Keyword(s):  
Diesel Engines ◽  
Emission Control ◽  
Pollutant Emissions ◽  
Exhaust Emission ◽  
Formation Mechanisms ◽  
Emission Regulations ◽  
Marine Diesel ◽  
Practical Performance ◽  
Control Technologies ◽  
Future Technologies

Exhaust emission regulations issued by International Maritime Organization (IMO) for marine diesel engines are given and formation mechanisms for several pollutant emissions are introduced. Main denitration and desulfuration technologies for reducing NOx and SOx emissions are seperately summarized. In addition, working mechanism of different emission control technologies and their applications on marine diesel engines are introduced. These different emission control technologies are analyzed by evaluating conversion efficiency, economy and practical performance, and existed problems and future technologies are given. A Combination of different denitration and desulfuration technologies is a inevitable trend for emission reduction of marine diesel engines.

Development of a Valve Controlled Four-stroke Chainsaw to Meet Future Emission Regulations

2006 ◽  
Author(s):  
Jan Rodenbeck ◽  
Bernhard Auler ◽  
Johannes Lügger ◽  
Ernst Gorenflo
Keyword(s):  
Emission Regulations ◽  
Future Emission
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