POWER AND PROPULSION
−− Cooling, bearings, lubrication and sealing −− Noise considerations • Free-floating, Wastegate, Variable Area or Variable Geometry Turbochargers and Controls • Compressor and Turbine Aerodynamics −− Aerodynamic design features −− Figures of merit for aero performance −− Performance maps and their impact on engine characteristics −− Methodology to evaluate the performance of compressors and turbines
Variable Valve Actuation: Design and Performance Impact on Advanced Powertrains 2 Days | Classroom Seminar I.D.# C1332 Engine valvetrain systems have become more capable and increasingly more compact in the quest to improve efficiency. The developments parallel the advancements in other key engine components such as fuel injection or spark systems, turbocharging, aftertreatment, base engine and controls. While the gasoline sector has seen a steady rise in the adoption of Variable Valve Actuation (VVA), Diesel systems have lagged behind and only a few systems have seen production. The level of VVA activity however in the Diesel sector is beginning to increase as tighter regulations of CO2 emissions approach. Valve control plays a strong role in a number of key areas: turbocharger systems, allowing for better optimization matching across wide engine operating flows; enabling advanced combustion strategies where control over the charge mass and temperature are important; and cold start, where valve timing can be extremely effective for engine warm up compared with other strategies that rely on additional fueling. This seminar will cover the range of Variable Valve Actuation technologies present in the market, their operation principles, and their effect on engine performance. Both gasoline and Diesel applications will be covered including how they impact the in-cylinder combustion as well as the aftertreatment. Participants will have the opportunity to perform hands-on exercises to examine the effects of the engine valve profiles on performance and are asked to bring a laptop computer, with Excel, to the seminar for class exercises. Learning Objectives By attending this seminar, you will be able to: • Describe and differentiate the variable valve actuation technologies present in the automotive industry • Describe the defining features of each of these technologies, their requirements for engine design layouts, required actuators, lube oil, and need for control and ECU interface • Apply basic tools to gage the thermodynamic impact effected by varying the valve profiles: impact on pumping efficiency, resulting charge mass trapped in cylinder, estimated bulk and adiabatic flame temperatures • Articulate the contribution of valve timing and control over the engine performance and aftertreatment in modern engines in the context of today’s emissions standards • Describe the limitations of current technologies towards more efficient and cleaner engines and the future role of valve actuation and its integration aspects with other advanced powertrain components
DAY TWO • Engine Air and EGR Flow Requirements −− Power density and efficiency considerations −− Emissions control considerations • Turbocharger Matching
−− Matching principles with and without EGR −− Single and multi-stage turbo matching • Turbocharger Selection Based on Engine System Requirement • Transient Response Considerations • Basic Spreadsheet Tools for Engine and Turbocharger Parametric Explorations −− Hands-on exercises for turbocharger and engine performance calculations −− Hands-on parametric studies using simple calculation tools DAY THREE • Impact of Turbocharging on Gasoline and Diesel Engine Performance and Emissions • Charge (Air and EGR) Cooling Systems • Advanced Concepts in Turbocharging including Design Features of Advanced Concepts −− Advanced versions of variable geometry turbocharging −− High temperature and high strength materials −− Two-stage turbocharging, series, parallel and sequential −− Exhaust gas recirculation systems to minimize impact on efficiency −− Turbocompounding −− Electrically (and hydraulically) assisted turbocharging −− Impact on emissions control in diesel and gasoline engines −− Cold start emissions issues, catalyst temperature for diesel and gasoline −− Turbocharger response issues
Instructor: Fee: $1850
Kevin Hoag and Roy J. Primus
2 CEUs
URL:
sae.org/learn/content/c0314/
223
3 ways to get a no-obligation price quote to deliver a course to your company: Call SAE Corporate Learning at +1.724.772.8529 | Fill out the online quote request at sae.org/corplearning | Email us at corplearn@sae.org
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