engine emissions Articles
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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 ...
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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) ...
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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 ...
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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 ...
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`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 ...
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Calculation of HC, CO and NO
xfrom civil aviation in Turkey in 2012To meet the growing demand for air transport, airline companies doubled their aircraft numbers in Turkey, where civil aviation activities have shown great development in recent years. This increase in aircraft numbers resulted in an emission problem. Considering its impact on regional air quality, the growing emission amounts are at a non–negligible level. We especially take the busiest airports ...
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Gas analysis implications of the new non-road mobile machinery (NRMM) regulation
On September 2014 the European Commission proposed a new regulation to harmonise across the EU the emissions limit values (ELV’s) from engines installed in Non-Road Mobile Machinery (NRMM). This new regulation replaces a number of national laws and, with effect from 1 Jan 2017, repeals a complex directive including 15 annexes and amended 8 times since 1997. Implementation timeframe for ...
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Catalytic Exhaust Emission Control of Small Internal Combustion Engines
ABSTRACT Gaseous emissions present in the engine exhaust of on-road motor vehicles are subject to stringent exhaust emission 2ontrol standards for carbon monoxide (CO), hydrocarbons, and oxides of nitrogen (NOx). All major automobile manufacturers utilize three-way catalytic converters to meet these standards. There are millions of small engines in on-road and off-road applications whose ...
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The effect of aircraft engine exhaust gases on the environment
The sources of air pollution are classified as point, line and surface sources. Motor vehicle pollution is modelled as a line source. Hitherto, studies of air pollution have emphasised surface pollution caused by fossil fuel burning for the purposes of obtaining energy and heating, and motor vehicle pollution studies are usually concentrated on land vehicles. In this study, the effect of aircraft ...
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Effect of turbulence intensity on PM emission of heavy duty diesel trucks – Wind tunnel studies
Abstract Stringent emission regulations have forced drastic technological improvements in diesel aftertreatment systems, particularly in reducing Particulate Matter (PM) emissions. The formation and evolution of PM from modern engines are more sensitive to overall changes in the dilution process, such as rapidity of mixing, background PM present in the air. These technological advancements ...
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Particulate partial flow sampling
The sampling method of the Sierra Instruments Model BG-3 sets the standard for engine particulate emissions measurement protocols of the future sierra instruments In a study at West Virginia University, evidence showed that the Sierra Model BG-3 partial-flow system is equivalent to full-flow CVS. At the August 2008 DEER conference, the university’s Dr Ben Shade presented a paper evaluating ...
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Key Considerations When Choosing a Concrete Mixer Pump
Concrete mixing pumps are essential equipment in the construction industry, offering a versatile solution for mixing and delivering concrete to various construction sites. Whether you are a construction professional or a business owner looking to invest in a concrete mixing pump, making the right choice is crucial. In this article, we will discuss the key considerations to keep in mind when ...
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Reducing the cost of emissions testing – Case Study
In the early 1970¹s, the U.S. Environmental Protection Agency (EPA) was formed in response to growing concern about air quality. The EPA developed emissions regulations that targeted the carcinogenic impact of engine exhaust, and set tough regulatory standards for manufacturers to develop cleaner engines. Engine makers needed an instrument that could accurately measure the quantity of ...
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Air Contaminant Control Ventilation for Controlling Worker Exposure
Local Exhaust Ventilation to Control Air Contaminants Local Exhaust Ventilation for reducing worker exposure is the best description of ventilation for the purpose of controlling air contaminants that may be released inside the building. The objective is to capture the containment before it reaches the operation and gets into the general air stream. As of 2017, Industrial Production has ...
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Black carbon emissions of individual cars measured under real conditions
Measurements of individual vehicle emissions are usually made in laboratory tests. In this study, researchers followed cars driving in real conditions to measure emissions of air pollutants, including black carbon and nitrogen oxides. The study shows that diesel cars contribute disproportionately to air pollution, and highlights the value of on-road measurements. Vehicle traffic is a major ...
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New Non-Road Regulations in USA and Europe
Earlier this year, the United States Environmental Protection Agency (EPA) introduced Tier 4 emissions standards for diesel engines in non-road mobile machinery (NRMM), which will come into force between 2008 and 2015.The European Union (EU) has also published its own, equivalent rules. Although the two sets of regulations are structured very differently, the effect is the same: a 90% ...
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VOC composition and ozone-forming potential of the exhaust gas of in-use motorcycles
The emission profile of volatile organic compounds (VOC) and the ozone-forming potential (OP) of the exhaust gas of six in-use motorcycles (four 4-stroke- and two 2-stroke-engines) were determined. The motorcycles were tested on a chassis dynamometer in a real-world driving cycle. The analysis involved the C2–C12-hydrocarbons as well as the aldehydes and ketones. Additionally, the regulated THC ...
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Environmental Considerations for Rubber-Tired Gantry Cranes
In an era where sustainability and environmental consciousness are at the forefront of industrial decision-making, the adoption of eco-friendly technologies becomes paramount. Rubber-tired gantry cranes (RTGs), commonly used in container terminals for efficient cargo handling, are no exception. This article explores the environmental considerations associated with rubber-tired gantry cranes and ...
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Multiple Pathway Health Risk Assessment of a Municipal Waste Resource Recovery Facility in Maryland
Untitled Document Following a 1986 decision by Montgomery County in Maryland to construct a municipal waste resource recovery facility near the town of Dickerson, local residents expressed concern regarding the potential health risks associated with the proposed facility. In response, the county conducted a multiple pathway health risk assessment for a generic ...
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Environmental Protection Advancements: The Role of Self-Loading Concrete Mixers in Sustainable Construction
In an era where environmental consciousness is increasingly becoming a priority, innovations in the construction industry are aligning with sustainable practices. The self-loading concrete mixer has emerged as a technological marvel not only for its efficiency but also for its positive impact on environmental protection. This article explores how self-loading concrete mixers contribute to ...
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