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Training / Education
2015-03-25
On-board diagnosis of engine and transmission systems has been mandated by government regulation for light and medium vehicles since the 1996 model year. The regulations specify many of the detailed features that on-board diagnostics must exhibit. In addition, the penalties for not meeting the requirements or providing in-field remedies can be very expensive. This course is designed to provide a fundamental understanding of how and why OBD systems function and the technical features that a diagnostic should have in order to ensure compliant and successful implementation. Fundamental design objectives and features needed to achieve those objectives for generic on-board diagnostics will be covered.
Training / Education
2015-03-02
Public awareness regarding pollutants and their adverse health effects has created an urgent need for engineers to better understand the combustion process as well as the pollutants formed as by-products of that process. To effectively contribute to emission control strategies and design and develop emission control systems and components, a good understanding of the physical and mathematical principles of the combustion process is necessary. This seminar will bring issues related to combustion and emissions "down to earth," relying less on mathematical terms and more on physical explanations and analogies.
Event
2014-12-10
Event
2014-12-10
Pd based catalysts has not been considered sufficient for converting methane to carbon dioxide for lean-CNG applications mainly in terms of durability, which finally impact the performance on long period. In the present investigation, we were addressed the substantial improvement of Pd-based catalyst with respect to its durability and initial activity. To obtain this, primarily the improvement was mainly achieved based on the new insight on the deactivation routes of Pd-based catalysts under normal operating condition of lean-CNG engines using various physicochemical tools. In addition, optimal engine control logic was carried in second stage of catalysts development by keeping the catalyst more durable. The system, comprised of improved Pd-based catalyst and engine control logic, has demonstrated the capability of complying EURO-6 regulations.
Event
2014-12-10
New rounds of stringent nitrogen oxides (NOx) emissions reduction regulations in Europe (Euro 6c) and North America (CARB LEV III, EPA Tier 3) are driving the optimization of existing diesel exhaust aftertreatment systems. Urea - Selective Catalytic Reduction (SCR) systems are among the de-NOx technologies that have been successfully introduced in recent years. The new regulations are bringing a closer look to SCR de-NOx performance particularly during the cold start phase of the existing emissions certification cycles. This presentation will review some of the options under consideration to address cold start NOx emissions. Some of these approaches impose new and more severe requirements on the urea injection function – these are also reviewed as well as the response to these requirements by the injection system designers.
Event
2014-12-10
One of the most important aspects of meeting emission standards is catalyst robustness. Emissions must be met at high mileage, termed “full useful life”, which is 150,000 mi for light and medium duty vehicles under Tier3/LEV3. Catalyst durability is application and system specific. Full useful life aging and correlations to accelerated aging schemes typically include both hydrothermal exposure and chemical poisoning. Robustness tests are designed to exceed the limits of a particular catalyst or filter material and test to failure. New aging schemes and robustness tests are needed when new technologies such as cold start traps for HC and NOx, gasoline particle filters, and SCR coated filters are incorporated into conventional three-way and diesel exhaust systems. This presentation will include a summary of recent emission certifications and publications by various vehicle manufacturers, aging and robustness testing of conventional exhaust systems, as well as a look into the durability of future emission control technologies.
Event
2014-12-10
Event
2014-12-10
Event
2014-12-10
Event
2014-12-10
The automotive industry is facing a combination of challenges over the next decade. Fuel economy regulations are increasing for light-duty vehicles, and U.S. EPA Tier 3 emissions standards are requiring lower tailpipe emissions. Advanced combustion techniques are being pursued to enable improved fuel economy, and lower NOx and PM emissions can be obtained by the more homogeneous combustion from these techniques. However, CO and HC emissions are often higher from advanced combustion engines, and the higher efficiency of these engines results in lower exhaust temperatures. The combination of higher CO and HC emissions with lower exhaust temperatures challenges conventional oxidation catalysts. Thus, new catalyst technologies are being pursued to lower light-off temperatures to enable emissions compliance. Research on novel catalyst formulations for control of CO and HC emissions will be presented.
Event
2014-12-09
Event
2014-12-09
Event
2014-12-09
Event
2014-12-09
Lean NOx Trap (LNT) is one of the two NOx control technologies for diesel cars. However, LNT generates high levels of H2S during its desulfation process. We have successfully developed an advanced CSF technology that can effectively control the H2S emission and at the same time maintain its oxidation function for CO/HC. We will show engine and lab data for LNT+CSF system, discuss the chemistry for H2S control and illustrate the functional principle for CSF design.
Event
2014-12-09
Recent legislation has been enacted requiring unprecedented reductions in greenhouse gas emissions, and thus improved fuel efficiency, from internal combustion engines. The aggressive rate of improvement in fuel consumption mandated by this legislation has resulted in the proposal of more exotic combustion strategies than have previously been considered for serial production. The new combustion strategies that are being considered for near term applications can result in substantially different operating environments and thus the required performance of the emission control system. To deliver the most efficient engine system for each application, the impact of the combustion strategy on emission control system requirements must be taken into account when selecting the combustion strategy for production to ensure the benefits of the combustion strategy are not offset by penalties associated with treating exhaust emissions. This discussion will present data on the impact of novel combustion strategies on the operating environment for the emissions control system.
Event
2014-12-09
Event
2014-12-09
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