engine emissions Articles
-
Experimental method for marine engine’s emissions analysis
Abstract The world is considering various solutions to reduce exhaust emissions, the use of alternative fuels and the development of more efficient marine engines. IMO the company gave guidance for future borders of individual exhaust components, taking into account a variety of applications and conditions for the operation of marine engines. Engine manufacturers have been forced to ...
-
Entropy approach for mitigation of environmental aviation impact and airport capacity increase
The implementation of the operational procedures to reduce aircraft noise and engine emission in the airport vicinity was under consideration in the paper. Emphasis was put on optimal aircraft operational procedures for noise and emission reduction taking into account interrelations of aircraft noise and engine emission. The task of minimising of aircraft noise impact and engine emission ...
-
NO x emission model of turbofan engine
During last decade a lot of investigations also focused on the evaluation of aircraft engine impact on local and regional air quality in the vicinity of the airport. The emission inventory of aircraft engines are usually calculated on the basis of certificated emission indexes, which is provided by the engine manufacturer and reported in the database of ICAO. The certificated emission indices ...
-
Impact of ambient air temperature and injection timing on reduction of engine out emissions of DI diesel engine operating under the influence of oxygen enriched hydrogen gas
The present experimental work is a study of the impact of ambient air temperature and the injection timing of diesel fuel on reduction of engine–out emissions of DI diesel engine, operating under the influence of oxygen enriched hydrogen gas. Here the oxygen enriched hydrogen gas was produced by the process of water electrolysis. The produced gas was aspirated into the combustion process of ...
-
Emission behaviour of modern heavy duty vehicles in real world driving
Within a national and two international research projects, a vehicle emission model was developed, which calculates emissions in real world driving from the engine emission maps by simulating engine power and engine speed. Influences of transient load changes on the emission level are taken into consideration by special functions. Model parameters are gained from a common measurement protocol on ...
-
Advice on choosing 2010 compatible specs for heavy haulers
Heavy haulers that transport loads above 120,000 pounds gross combination weight (GCW) must carefully specify their trucks for both durability and power. An over-spec’d truck may reduce fuel mileage and increase acquisition costs, while an under spec’d truck may not be sufficient to move the load, or may increase maintenance costs. The challenge is to achieve the right balance between ...
-
Oxidation Catalysts for BTC Pipeline
Description Eighteen (18) compressors, powered by 7600 hp Wartsila engines. The compressors move oil from the Caspian Sea to the Mediterranean Sea in the Turkish portion of the Baku-Tbilissi-Ceyhan (BTC) pipeline. Challenge Engine-out emissions for this major pipeline project were to meet the World Bank standards. The design target called for an oxidation catalyst to reduce ...
-
Exergy analysis of combustion characteristics and NOx emissions of a dual–fuel engine
The combustion characteristics and NOx emissions of compression ignition engines working on a dual fuel mode are investigated numerically and their exergetic efficiencies are determined. The model has been validated with available experimental results. The simulation results show that dual fuel engine combustion and trend of NOx emissions are well predicted by the present model. Parametric study ...
-
See How Cubic Effectively Controls Car Pollution Through Innovation in Engine Emission Detection Technology
Environmental pollution has always been the focus of attention. In order to alleviate the air pollution caused by motor vehicle emissions, countries around the world have been scrambling to develop new energy vehicles in recent years. Although new energy vehicles have been developed, the application of gasoline and diesel fueled internal combustion engines is still dominant at this stage.How to ...
-
New engines: Time to clear the air
In response to new federal emission standards that went into effect Jan. 1, 2010 in the U.S. and Canada, engine manufacturers selected one of two choices to achieve a reduction in emissions of oxides of nitrogen (NOx). They either provide an in-cylinder approach through increased exhaust gas recirculation (EGR) only, or an engine aftertreatment approach using selective catalytic reduction (SCR) ...
-
2022 Updated Engine Emission Detection Technology and Equipment Technology and Market Analysis by Cubic
Environmental pollution has always been the focus of attention. In order to alleviate the air pollution caused by motor vehicle emissions, countries around the world have been scrambling to develop new energy vehicles in recent years. Although new energy vehicles have been developed, the application of gasoline and diesel fueled internal combustion engines is still dominant at this stage. How to ...
-
A method to extend flamelet manifolds for prediction of NOx and long time scale species with tabulated chemistry
Numerical simulation is currently used to help design low NOx devices for aircraft engines. In order to improve the prediction of pollutant species, combustion models based on tabulated chemistry have been commonly used in recent years. However, the short time scales of usual flamelet manifolds can lead to errors concerning the NO prediction in post flame area, as shown in this paper. Thus, a new ...
-
Air/Fuel Control Key to Engine Performance
Continental Controls’ products combine to increase output and fuel efficiency while holding the line on exhaust emissions The increased demand and cost of natural gas coupled with ever tightening exhaust emission standards presents a challenge to those who must extract the most power from their engines while using less fuel and staying within exhaust emission regulations. One company ...
-
Characterising emissions from private passenger vehicles using engine operating patterns
A method to simulate emissions factors using frequency distribution plots of engine speed and engine load is proposed. The distribution plots and corresponding emissions factors were developed from speed time series' of real-world driving cycles and physical properties of a range of private passenger vehicles tested at the EMPA. Emissions factors were estimated for a set of simultaneously ...
-
A Predictive Model for Catalytic Converters on Stationary IC Engines
SUMMARY This paper describes the details of a predictive model specifically designed for catalytic converters used for stationary industrial engines. This model uses inputs such as engine emission characteristics, fuel, exhaust system design and engine duty cycle. The architecture of the model provides two main modes of computation: transient conditions and steady state conditions. The ...
-
Multi response optimisation in emission control of CI engine fuelled with crude rice bran oil blend
In the present work, high free fatty acid (FFA) crude rice bran oil (CRBO) blend was tested in a stationary CI engine and investigation was focused to reduce NOx emission than diesel with lesser smoke density. Combustion process was modified by varying the factors namely fuel injection timing, percentage EGR and fuel injection pressure in a combination suggested by Taguchi's L9 orthogonal array. ...
-
Federal PSD/Title V Stationary Source Permitting Exclusion of Nonroad Engines
The PSD and Title V programs derive their applicability based on the aggregate air emissions from on-site equipment at each facility. Many railyards operate small combustion equipment such as gasoline-powered welders, compressors, and generators. These units may qualify as nonroad engines. Air emissions from nonroad engines need not be included in a facility’s aggregate air emissions when ...
-
Static and dynamic instantaneous emission modelling
Emission models can be categorised into three categories: average speed models; traffic situation models, used at macro-scale or meso-scale level (national, regional, city level); and instantaneous (modal) models, useful at micro-scale level (street, vehicle level). To improve the existing instantaneous emission models, some preconditions must be fulfilled: the emission signals should be measured ...
-
`Federal PSD/Title V Stationary Source Permitting Exclusion of Nonroad Engines,` presented at the 2004 Railroad Environmental Conference
Abstract The PSD and Title V programs derive their applicability based on the aggregate air emissions from on-site equipment at each facility. Many railyards operate small combustion equipment such as gasoline-powered welders, compressors, and generators. These units may qualify as nonroad engines. Air emissions from nonroad engines need not be included in a facility's aggregate air emissions ...
-
Performance and exhaust emissions of a two-stroke spark-ignition engine with a direct-injection system
A direct fuel-injection system has been adapted to a small two-stroke spark-ignition engine to prevent the charge from flowing through the cylinder during the scavenging process. The injection system consists of a jerk-type pump and a single-hole nozzle which supplies gasoline to the cylinder. Engine tests were carried out for comparison with the carburettor version of the same engine. The ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you