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Training / Education
2014-12-03
Turbocharging is already a key part of heavy duty diesel engine technology. However, the need to meet emissions regulations is rapidly driving the use of turbo diesel and turbo gasoline engines for passenger vehicles. Turbocharged diesel engines improve the fuel economy of baseline gasoline engine powered passenger vehicles by 30-50%. Turbocharging is critical for diesel engine performance and for emissions control through a well designed exhaust gas recirculation (EGR) system. In gasoline engines, turbocharging enables downsizing which improves fuel economy by 5-20%. This web seminar will explore turbocharging for gasoline and diesel (heavy and light duty) engines, including the fundamentals of turbocharging, design features, performance measures, and matching and selection criteria.
Training / Education
2014-11-10
The need to control emissions and maintain fuel economy is driving the use of advanced turbocharging technology in both diesel and gasoline engines. As the use of diesel engines in passenger car gasoline and diesel engines increases, a greater focus on advanced turbocharging technology is emerging in an effort to reap the benefits obtained from turbocharging and engine downsizing. This seminar covers the basic concepts of turbocharging of gasoline and diesel engines (light and heavy duty), including turbocharger matching and charge air and EGR cooling, as well as associated controls. The limitations and future possibilities of today's systems will be covered, as well as details on how emerging technologies will impact engine/vehicle performance.
Event
2014-10-22
This session describes design, performance, and operating characteristic of crucial peripheral devices, intake and exhaust manifolds, and engine block structures and features.
Event
2014-10-21
This session will cover conceptual, modeling and experimental studies relating to advanced turbochargers/superchargers and advanced boosting systems to achieve increased power density, better fuel economy, and reduced emissions.
Technical Paper
2014-10-13
Elias Sundström, Bernhard Semlitsch, Mihai Mihaescu
This paper focuses on numerical analysis of the flow in a ported-shroud centrifugal compressor at stable and unstable near-surge operating conditions. A production turbocharger compressor which is widely used in the heavy automotive sector is considered. A systematic approach is taken to assess the flow solver employed and to characterize the flow field under steady-state and unsteady conditions. The computational data are compared with available experimental measurements, which represent an idealized installation. The Reynolds Averaged Navier-Stokes (RANS) method is used initially on successively refined grids and cell types to assess the dependency of the computed flow solution to the mesh resolution used. The RANS method used is based on the integral formulation of the Navier-Stokes equation with the time-dependent part set to zero. Convection and diffusion terms are approximated in finite volumes with averaged values over cell faces. The SST k-omega two-equation model is used, assuming isotropy of turbulence with no curvature correction option.
Technical Paper
2014-10-13
Ian S. Park, Andrew M. Williams
Modelling of turbochargers based on steady state operating maps for turbine and compressor rotors is widely recognized to have limitations arising from flow pulsations and heat transfer effects that are not well accounted for by interpolation and extrapolation from the mapped data. With implementation of low pressure exhaust gas recirculation systems and multi-stage boosting, the inlet conditions of centrifugal compressors vary more widely than traditional single stage compression systems. Understanding the impact of the inlet conditions on irreversibilities, and therefore efficiency complements existing works on pulse flow and heat transfer effects in informing the engine modelling community. This research experimentally explores the effect of inlet pressure and temperature on the total-total efficiency of a steady flow centrifugal compressor across a range of conditions in isolation of pulse flow effects and with negligible heat transfer. The results suggest that for any given corrected mass flow rate and total-total pressure ratio the isentropic efficiency is dependent on inlet conditions.
Technical Paper
2014-10-13
Jose Serrano, Pablo Olmeda, Francisco Arnau, Artem Dombrovsky
These days many research effort on internal combustion engines is centred on optimising turbocharger matching and performance on the engine. In the last years a number of studies have pointed that heat transfer phenomena have a strong effect on turbocharger behaviour. The difficulty of determining the necessary data to take into account such phenomena arises as a consequence of the little information provided by turbocharger manufacturers. In this background, Original Engine Manufacturers (OEM) need general engineering tools able to provide reasonably precise results in predicting the mentioned heat transfer phenomena. Therefore, the purpose of this paper is to provide a procedure, applicable to small automotive turbochargers, able to give necessary heat transfer properties that can be used in a lumped 1D turbocharger heat transfer model. Such model must be suitable to work coupled to whole-engine simulation codes (such as GT-Power or Ricardo WAVE) for its usage in a global engine models by the OEM.
Technical Paper
2014-10-13
S. Loganathan, M. Anand, V. Vikraman, R. Vikas
Fuel Economy & CO2 Reduction in IC Engines is the key driving factor for the Product performance & Customer satisfaction all around the world. The Stringent CO2 Limits calls for Engine Friction Reduction, Engine Downsizing & other Alternative measures. The challenges were to measure the component level Friction Contribution on the Engine & to select the critical contribution parameter & to optimize the same. Oil pump is one such important engine parasitic load which takes up engine power through crankshaft to deliver oil flow rate according to engine demand. The proper functioning of the Oil pump is considered with required engine Oil pressure along with optimum power consumption over various operating speed and temperature. Hence the various Oil pump critical design metrics are reviewed for two cylinder common rail diesel engine to have optimal power consumption and without reduction the Oil pressure at the engine oil gallery. Then the design should is validated with the engine testing against the current and optimized design to deploy the same.
Technical Paper
2014-10-13
Ming Chen, Yanjun Wang, Wenrui Wu, Jun Xin
Because of increasing performance and emission demands, turbo charged gasoline engines are becoming popular in the market. These downsized engines have higher thermal loads and experience increased levels of vibration. As a result, thermo mechanical fatigue cracks on exhaust manifold and gasket sealing failure are often observed during engine durability tests, such as thermal shock test. The present paper describes a CAE approach to evaluate the exhaust manifold design. It allows the design engineers to identify structural weakness at the early stage and/or to find the root cause of the exhaust manifold failure. A transient none-linear finite element method is used to calculate the plastic deformation and thermal mechanical behaviors of the exhaust manifold assembly under the thermal shock test cycles, which include rated speed full load, rated speed motored and idle speed conditions. Transient heat transfer simulation is performed to provide thermal boundary conditions for the nonlinear stress/strain analysis.
Technical Paper
2014-10-13
D. Saravanan, Anish Gokhale, N. Karthikeyan
The demand of Torque from an engine is highly variable, good torque at Partially Open Throttle (POT) condition improves drivability at city driving condition and good torque at Wide Open Throttle (WOT) condition improves cruising at highway driving condition, conventionally engine produces better torque at one particular operating condition leaving poor drivability at others. The Torque characteristics of an engine depends upon the volumetric efficiency of the engine, volumetric efficiency of a naturally aspirated engine can be improved by tuning the intake manifold, with an overall improvement in volumetric efficiency throughout the engine operating conditions better torque curve can be achieved which facilitates improved combustion and drivability. For improving volumetric efficiency, several technologies were developed and used, among that Dual Intake Manifold system is one where the flow of charge is channelized between longer and shorter flow path depending on the engine operating condition.
Technical Paper
2014-10-13
He Changming, Xu Sichuan
The in-cylinder tumble intensity of GDI engine is crucial to combustion stability and thermal efficiency, required to be changed as the different operation conditions. A variable tumble system (VRS) applied to GDI engine was introduced to meet tumble ratio requirements in various situations. The transient gas exchange of four combustion systems all were investigated during both intake and compression strokes based on CFD simulation, namely (1) Case 1-Intake port B (with flap valve)/Spherical piston top; (2) Case 2-Intake port B (without flap valve)/Spherical piston top; (3) Case 3- Intake port A/Spherical piston top; (4) Case 4- Intake port A/Dented piston top. The simulated results of dynamic tumble ratio showed that during the whole intake process the dynamic tumble ratio of Case1 was obviously higher than other cases under the same boundary conditions, and the maximum value was about 5~6 times higher. The crank angle range, at which the strong tumble motion fully developed, was merely about 70oCA, roughly from 410oCA to 480oCA.
Event
2014-10-09
Session CV302 focuses on the mechanical design of Powertrain and drive train components, sub-systems, and systems. Relevant topics include but are not limited to: Materials, coatings, and processes Design/Analysis/Test methods Novel designs of Powertrain and drive train components and sub-systems: Noise/Vibrations of Powertrain/drive train components and sub-systems- gear rattle, torsional vibration, sound power, etc. Powertrain and drive train includes but is not limited to engine, mounting, transmission, driveshaft(s),differential(s),dropbox(es), and axles.
Training / Education
2014-10-06
As diesel engines become more popular, a fundamental knowledge of diesel technology is critical for anyone involved in the diesel engine support industry. This course will explain the fundamental technology of diesel engines starting with a short but thorough introduction of the diesel combustion cycle, and continue with aspects of engine design, emission control design, and more. An overview of developing technologies for the future with a comprehensive section on exhaust aftertreatment is also included. The text, Diesel Emissions and Their Control, authored by Magdi Khair and W. Addy Majewski is included with the seminar.
Training / Education
2014-10-02
The purpose of this course is to provide an overview of the factors in the cylinder kit assembly of natural gas, gasoline, and diesel engines that affect oil consumption, ring and cylinder bore wear, and blow-by. This course includes background and the evolution of designs and materials currently employed in modern engines as well as providing an overview of computer models, designs, and material systems that can be utilized to optimize the performance of new engines. An overview of the trends in materials and designs employed in U.S., European and Japanese engines will be presented.
Technical Paper
2014-09-30
Igor Taratorkin, Viktor Derzhanskii, Alexander Taratorkin, Sergey Kharitonov
The paper presents the findings of the investigation of consistent patterns of parametric resonances in the nonlinear system "Engine unit – Torque Converter – Planetary Transmission Elements (Drum and Lined Plate). The mentioned oscillations and resonances form dynamic loading of powertrain lined plates. The paper validates the ways of tuning parametric oscillations providing for increasing durability of multiplate clutches plates of vehicle powertrain in terms of the research results. The evaluation of dynamic stability was led on the basis of the analysis of Mathieu equation and Ince-Strutt diagram. The restriction of the depth of rigidity modulation parameter is offered by filtering of high-frequency disturbances which are generated in the nonlinear system by the power unit (internal combustion engine (ICE) or electric motor (EM)), by hydrodynamic processes in the hydraulic transformer (torque converter or hydraulic coupling) and in the system of its oil supply. The efficiency evaluation of the influence of the developed actions on lined plate’s durability is performed.
Technical Paper
2014-09-30
Balakrishnan Natesan
Abstract Phosphorous is an important alloying element in powder metallurgy applications. It is used in P/M parts for effective Sintering, dimensional stability, improved machinability, corrosion resistance etc. However it does have some negative effects on properties of P/M parts. The purpose of the paper is to study the effect of phosphorous on PM gear of Mix A and Mix B having identical composition differing only in phosphorous content. The samples were detailed on each stage, viz. sintering & Heat treatment. In addition 2 defective samples were studied to observe the extent to which phosphorous may deteriorate the P/M Gear.
Technical Paper
2014-09-30
Nishant Mohan, Mayank Sharma, Ramesh Singh, Naveen Kumar
The economics of operating internal combustion engines in cars, buses and other automotive equipment is heavily affected by friction and wear losses caused by abrasive contaminants. As such, dust is a universal pollutant of lubricating oils. Road dust consists of depositions from vehicular and industrial exhausts, tire and brake wear, dust from paved roads or potholes, and from construction sites. Present research investigates the influence of SAE dust powder of size 5 µm-100 µm as contaminant in SAE 20W-40 lubricant on the relative motion of a plane surface over the other having circular surface in contact. A pin-on-disk setup as per ASTM G99 has been used to conduct the experiments, firstly at increasing rpm keeping constant load of 118 N, and secondly by increasing loads, keeping rpm constant at 1000. The contaminated lubricant has been used to study its influence on friction and wear rate at the interface of pin of 12 mm diameter and disk at track diameter of 98 mm. Based on the experiments at constant load, the coefficient of friction decreased with increase in rpm and the wear rate first increased and then decreased.
Technical Paper
2014-09-30
K Giridharan
Abstract: In this research paper, a novel train traction system is described (Indian patent and PCT application are pending). In this system, the vehicle is lifted like a hovercraft by air cushion and the traction is achieved by using horizontally mounted all wheel drive. Chance of derailment is completely eliminated and wherein even in the event of failure of few traction wheel stations during run, the train remains mobile with absolute safety even at high speeds. Horizontally mounted all wheel drive traction is powered by overhead electrification to maintain high power to weight ratio and faster acceleration. In the present invention, no rail but just a flat surface on the vertical side walls of the simple traction bed is used. This eliminates the enormous cost of laying the complex and expensive railway tracks. Other advantages include the lack of exhaust fumes and carbon emissions at point of use especially in countries where electricity comes primarily from non-fossil sources, less noise, lower maintenance requirements of the traction units.
Technical Paper
2014-09-30
Sibel Kaya, Barış Ayber
This study is inspired by the calculations and validations required for front wheel drive (FWD)-halfshaft joint selection. To increase design efficiency with decreased response time; a tool is required to validate calculations of strength based on maximum impact torque and endurance life based on corresponding vehicle usage. The tool has been developed to cover both strength and endurance life calculations. It also includes a constant velocity joint (CVJ) size library in order to compare different cases and to be able to see opportunities between different sizes. Validation and correlation has been completed using road load data from actual vehicles and standard load cycle (SLC) rig test results. This study introduces a more efficient methodology that will help the user select a joint that is sized best for strength and cost. After the completion of the study, one can be assured that the joint selected is the proper size-for all kinds of FWD vehicles.
Technical Paper
2014-09-30
Jagjeet Singh, Gagandeep Singh
As technology advanced, synchronizer which were previously sold as feature in hi-end vehicles are becoming a "standard" feature. In most off road vehicle / tractors constant mesh gear box are replaced with synchromesh gearbox as driver demand for more and more comfort. In synchromesh gear box when gear is shifted from one gear to another a locking provision is provided in gear dog teeth and shifting sleeve which is known as "Back Taper angle" which avoid gear jump out. This locking provision is different from "interlocking" which avoid double gear engagement. In this paper, a new design method is mentioned in which back taper angle is eliminated from both shifting sleeve and gear dog teeth and machining is provided on hub and entry chamfer on both gear dog teeth and shifting sleeve are changed from symmetric to asymmetric. This new design reduced gear shift effort and avoid gear jump out. This new machining can be done by simple gear cutting operations and there is no need for an special machine as required to generate back taper angle.
Technical Paper
2014-09-30
Michael Franke, Shirish Bhide, Jack Liang, Michael Neitz, Thomas Hamm
Exhaust emission reduction and improvements in energy consumption will continuously determine future developments of on-road and off-road engines. Fuel flexibility by substituting Diesel with Natural Gas is becoming increasingly important. To meet these future requirements engines will get more complex. Additional and more advanced accessory systems for waste heat recovery (WHR), gaseous fuel supply, exhaust aftertreatment and controls will be added to the base engine. This additional complexity will increase package size, weight and cost of the complete powertrain. Another critical element in future engine development is the optimization of the base engine. Fundamental questions are how much the base engine can contribute to meet the future exhaust emission standards, including CO2 and how much of the incremental size, weight and cost of the additional accessories can be compensated by optimizing the base engine. This paper describes options and potentials to improve the base engine for future commercial and industrial engines.
Event
2014-09-24
This session will contain papers describing progress in new engine concepts relating to both airbreathing and non-airbreathing congiurations. Of particular interest are concepts which will improve performance, safety, noise, emissions and cost.
Technical Paper
2014-09-16
Mark Mataczynski, John Hoke, Daniel Paxson, Marc D. Polanka
The engines used to power small unmanned aerial systems are often commercial off the shelf products that were originally intended to be used by hobbyists on very small model aircraft. These aircraft typically fly very close to the ground at conditions similar to that of standard sea level. For military applications, it is desirable to fly at higher altitudes. Maintaining enough power from the engine at the reduced ambient air pressures associated with higher altitudes requires some method of increasing oxygen delivery or increasing the manifold absolute pressure back to that of sea level conditions. Conventional turbochargers and superchargers are typically very inefficient for the small mass flows associated with these engines. Due to its unique characteristics, a pressure wave supercharger may be able to avoid some of these losses for very small compressors. This project designed a small scale pressure wave supercharger for turbo-normalization of a Brison 95 cc engine for a small unmanned aerial vehicle.
Standard
2014-08-28
This document covers the mechanisms associated with the power cylinder system which might affect blow-by. It will not discuss in detail the blow-by mechanisms from other systems or engine subsystems.
Standard
2014-08-05
This document describes methodologies to determine the causes of high oil consumption caused by primarily the power cylinder system.
Standard
2014-08-05
This document describes methodologies to determine the causes blow-by oil consumption caused by the power cylinder.
Viewing 1 to 30 of 6298

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