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Optimization Of A Retrofit Urea-Scr System, Clinton R. Bedick
Optimization Of A Retrofit Urea-Scr System, Clinton R. Bedick
Graduate Theses, Dissertations, and Problem Reports
Oxides of nitrogen (NOx) emissions from legacy diesel engines are often many times over currently mandated standards, contributing significantly to degradation of air quality and negative environmental impact. A retrofit urea-SCR (selective catalytic reduction) aftertreatment system offers a viable solution for reducing NOx emissions from older diesel engines. A stand-alone retrofit urea-SCR aftertreatment system was previously developed by West Virignia University (WVU) engineers, implementing a pre-SCR NOx sensor, open-loop feed-forward control, and stoichiometric NOx reduction logic. During experimental testing at WVU, the urea-SCR system demonstrated NOx reductions of 2% to 53%, depending on the test cycle. In order to optimize …
Transient Flow Characteristics Of A High Speed Rotary Valve, Patrick H. Browning
Transient Flow Characteristics Of A High Speed Rotary Valve, Patrick H. Browning
Graduate Theses, Dissertations, and Problem Reports
Pressing economic and environmental concerns related to the performance of fossil fuel burning internal combustion engines have revitalized research in more efficient, cleaner burning combustion methods such as homogeneous charge compression ignition (HCCI). Although many variations of such engines now exist, several limiting factors have restrained the full potential of HCCI. A new method patented by West Virginia University (WVU) called Compression Ignition by Air Injection (CIBAI) may help broaden the range of effective HCCI operation. The CIBAI process is ideally facilitated by operating two synchronized piston-cylinders mounted head-to-head with one of the cylinders filled with a homogeneous mixture of …
Characterization Of Exhaust Emissions From Palm Oil-Based And Soybean Oil-Based Biodiesel Fueled Heavy-Duty Transit Buses, Trampas Jay Efaw
Characterization Of Exhaust Emissions From Palm Oil-Based And Soybean Oil-Based Biodiesel Fueled Heavy-Duty Transit Buses, Trampas Jay Efaw
Graduate Theses, Dissertations, and Problem Reports
Biodiesel blends offer a renewable energy fueling option for compression-ignition internal combustion engines. Typically, biodiesel blended at or less than 20% (B20), by volume, will exhibit substantial reductions in diesel particulate matter (PM), while not significantly impacting oxides of nitrogen (NO X) emissions. Additionally, operation on biodiesel blended at B20 levels or less has not been associated with substantial fuel economy penalties.;A study was conducted, wherein two transit buses were utilized to quantify the emissions and performance effects associated with the use of biodiesel fuels, derived from palm oil and soybean oil. Evaluation of the two fuels was accomplished through …
Design And Testing Of The Wvu Challenge X Competition Hybrid Diesel Electric Vehicle, Howard Andrew Mearns
Design And Testing Of The Wvu Challenge X Competition Hybrid Diesel Electric Vehicle, Howard Andrew Mearns
Graduate Theses, Dissertations, and Problem Reports
The WVU Challenge X Team was tasked with improving the fuel economy of a 2005 Chevrolet Equinox while maintaining the stock performance of the vehicle. A through-the-road-parallel hybrid diesel-electric was implemented to accomplish this goal. The greatest potential for improvement to hybrid electric vehicle technology is in energy storage in terms of cost, size, lifespan, and efficiency. Currently, battery cost is limited by the expense of the base materials. The characteristically low power density of electrochemical energy storage rather than energy density is responsible for the size of current hybrid energy storage systems. A limited lifespan is inherent in electrochemical …
Influence Of Accelerator Pedal Position Control On Heavy Duty Diesel Engine Emissions And Performance, Michael Ursic
Influence Of Accelerator Pedal Position Control On Heavy Duty Diesel Engine Emissions And Performance, Michael Ursic
Graduate Theses, Dissertations, and Problem Reports
Heavy-duty diesel engines (HDDEs) typically burn hydrocarbon fuels and as a result their emissions cause harmful products of combustion to be emitted into the atmosphere. Due to these harmful emissions, the United States Environmental Protection Agency (EPA) has created strict emissions standards for these heavy-duty engine manufacturers to meet. Engine manufacturers strive to meet these stringent standards while maintaining performance requirements set forth by the consumer. The EPA currently mandates laboratory testing of all HDDE families on an engine dynamometer utilizing a standard testing procedure. One standard testing procedure that HDDEs must execute is commonly known as a Federal Testing …
The Effect Of Different Road Load Implementation Strategies On Fuel Economy Of Usps Step Vans, Seiar Ahmad Zia
The Effect Of Different Road Load Implementation Strategies On Fuel Economy Of Usps Step Vans, Seiar Ahmad Zia
Graduate Theses, Dissertations, and Problem Reports
West Virginia University (WVU) is continuously improving and updating their testing quality, procedures and goals. As tests are conducted on the Transportable Heavy Duty Vehicle Emissions Testing Laboratory (THDVETL), real world implementation is crucial in order to compare and contrast vehicles within fleets, use of exhaust aftertreatment devices and hybridized vehicles. WVU implements road loads on the chassis dynamometer using a method described in 40 CFR §86.1229-85. The proposed method requires three variables from the vehicle: maximum height, maximum width and vehicle weight. The issue with this method arises due to the fact that it does not cover a wide …
Fuel Economy And Emissions Benefits From Diesel Fuel Additives, Geoffrey James Newlin
Fuel Economy And Emissions Benefits From Diesel Fuel Additives, Geoffrey James Newlin
Graduate Theses, Dissertations, and Problem Reports
With the spike in fuel costs during 2008, fuel consumption, and methods to reduce it, has come to the forefront of society, and recognition that inexpensive energy sources for mobile transportation may be a thing of the past. Even though fuel costs did significantly decrease by 75% after this spike [1], they will most likely continue to rise. Improvements to mobile transportation and the reduction of greenhouse gas emissions are a major agenda item of the United States and many industrialized nations. New and improved technologies will be developed and employed for future transportation needs of society. However, the existing …