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Viewing 1 to 30 of 5373
Event
2015-06-22
This session deals with analytical, computational and experimental studies of the dynamic response including noise and vibration of automotive driveline system and components. Typical topics of interests include, but not limited to, torque converters, gear noise, axle noise driveline system dynamics, transmission noise and vibrations, powertrain dynamics, transient dynamic response and propshaft balancing.
Event
2015-06-22
The focus of the Structural Analysis session is to share experiences on analyzing, testing, and developing solutions to structural noise and vibration problems from powertrain sources. Analytical modeling, experimental testing and predictive correlation are just a few of the tools used in this endeavor.
Event
2014-12-09
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.
Training / Education
2014-12-02
An efficient, robust, and quiet running drivetrain is as essential to customer satisfaction as styling and interior creature comforts. In this seminar, you will be exposed to various methods that can be used to accomplish this goal. Designed to help you visualize both individual components and the entire drivetrain system - without reference to complicated equations - this seminar focuses on the terms, functions, nomenclature, operating characteristics and effect on vehicle performance for each of the drivetrain components. Attendees will receive an introduction to the various components of the drivetrain, including the clutch or torque converter, manual or automatic transmission, driveshaft, axle, wheel ends, and brakes.
Event
2014-10-22
This session sets out to reflect the recent advances on the research, development and practices of Powertrain NVH treatment. The technical papers are of interest to powertrain system designers, testing specialists, NVH experts, and other individuals who evaluate and develop technologies to control powertrain NVH. The coverage includes: engine, engine subsystem and components noise and vibration; powertrain systems noise measurement and instrumentation; powertrain systems noise analysis.
Event
2014-10-22
This session sets out to reflect the recent advances on the research, development and practices of Powertrain NVH treatment. The technical papers are of interest to powertrain system designers, testing specialists, NVH experts, and other individuals who evaluate and develop technologies to control powertrain NVH. The coverage includes: engine, engine subsystem and components noise and vibration; powertrain systems noise measurement and instrumentation; powertrain systems noise analysis.
Event
2014-10-21
The industry continues to work on understanding the interaction of lubricating fluids with driveline hardware in order to improve vehicle efficiency, durability, and performance. Discussions in this session involve lubricant studies that offer improvements to current fluids, alterations of test methods or provide new insights into how lubricants impact current technology.
Event
2014-10-15
Gears have found prevalent use in automotive industry; and most commonly used in vehicle drive trains. During transmission of power through gears, power is lost through heat dissipation, occurring due to friction between geared elements and churning losses of lubricating oil. While fuel consumption alone is a sufficient reason for seeking reduced drive train power losses, there are other supplementary reasons as well. Excessive power losses within the transmission amount to additional heat generation and higher temperatures, thus, adversely impacting gear contact fatigue, scuffing failure modes, operator comfort and reduce lubricating oil life. A more efficient transmission will free up the demands on the capacity and the size of the lubrication system; consequently, the amount and quality of the gearbox lubricant are also eased with improved efficiency. The load-independent churning losses are caused by a host of factors including viscous dissipation of bearings and gear oil churning and windage that are present as a result of oil/air drag on the face and sides of the gears as well as pocketing/squeezing of lubricant in the meshing zone.
Event
2014-10-15
To control transmission solenoid efficiently and ensure its functionality, ASIC is used in TCU and it has its own diagnostic function to detect abnormal functionality. Through this diagnosis function of ASIC, mechanical part of transmission can be protected from wrong shifting control by shutting off all of solenoid power when circuit failure of each solenoid or its related wiring connection is happened. After confirmation of failure of solenoid or its related wiring connection, then TCU does not control any of solenoids and vehicle goes into limp home mode for vehicle maintenance by shutting off power of solenoids. Some of TCU uses high side driver for solenoid to supply power on each of solenoid and to control each of solenoids and it has its own limited diagnostic function. But provided diagnosis function of high side driver can not be used because it can cause wrong diagnosis of ASIC which used for low side control of solenoids. In addition, supplied diagnosis function of high side driver can not distinguish correct failure root cause so that it can violate OBD (On Board Diagnosis) regulation released by California Air Resource Board.
Event
2014-10-15
In order to improve fuel economy to meet future regulatory standards, many new features must be added to vehicle powertrains. One of these is Stop/Start (micro hybrid) technology; allowing engine stop when operation is not necessary such as idling during traffic stops. Stop/Start technology allows auto manufactures to meet increasingly difficult fuel economy standards. In automatic transmission vehicles, the transmission must remain able to quickly engage gear in order to allow quick response on engine restart.
Event
2014-10-15
The European and Chinese passenger car markets are seeing the continued growth of the dual clutch transmission (DCT) which can be well understood against the background of its advantages. These include improved fuel economy, acceleration, shift quality, and compatibility with diesel engine use and electric drive motors. As an alternative to manual transmissions, the platform sharing provided offers favourable manufacturing opportunities where they are based on manual transmission architecture. The same fluid cannot be used in both applications however. The industry expects the DCT penetration to increase over time as roads become more congested and driving becomes more of an effort due to the increased driver frequency of declutching, handshift, clutching episodes. This change in transmission choice globally will be influenced by the important factors of fuel economy, durability, and driving quality, which will be enhanced - in some cases solved - by the lubricant fluid technology. There are significant fluid and additive design challenges to be overcome for the DCT.
Event
2014-10-15
Global OEMs face increasing regulatory requirements to reduce CO2 emissions and fuel consumption. One of the key technologies to enable meeting these requirements are engine stop-start systems, which can typically achieve a 2 to 4% fuel consumption benefit. As a result, stop-start systems are having significant growth with sales projected to reach 50 million units/year by the end of this decade.
Event
2014-10-15
GKN Driveline has launched a unique transmission for hybrid vehicles. Developed in Japan, the transmission works in combination with an electric motor, generator and internal combustion engine to deliver greatly improved fuel efficiency, high performance and flexibility. The powertrain can switch from: - Pure EV with a top speed of 120kph to - Series Hybrid, supported by the ICE via Generator when SOC is below 30% and - Parallel Hybrid with direct ICE support on the front for best efficiency and maximum performance This flexibility provides unmatched performance with a range of 900km and a fuel consumption of as low as 123.9mpg(1,9l/100km). The Multi-Mode eTransmission is driving the front wheels and combines ICE, Generator and electric Motor in a way to provide either EV, parallel ore serial hybrid mode with smooth, comfortable transition, fully transparent to the driver. The layout combines an electric motor, a generator and ICE powertrain in one transmission. Key elements of the transmission are the hydraulic clutch system to connect/disconnect smoothly the ICE to the front wheels, and the advanced gear design to achieve high efficiency and near-silent running.
Event
2014-10-15
Predicting the temperature distribution within a gearbox under operating conditions is a challenging task. This is due to the unsteady multiphase flow of the oil, local heat generation sources between the intermeshing gears and within the bearing, and the complex external airflow pattern surrounding the casing. Geometrical details within the gearbox, for example small gaps and features, as well as detailed cooling fins structure sounding the casing add to the modeling challenges. Complexities also arise due to the drastically different time scales representing the highly transient flow within the gearbox and the near steady external airflow removing that thermal load. For example, the gearbox needs minutes to reach its steady state temperature which represents tens of thousands of revolutions of the gears. The current work represents a methodology for modeling this multi-scale problem. A generic four-speed gearbox is considered. First, the detailed isothermal multiphase flow of the oil is modeled using the volume of fluid (VOF) technique to predict the splashing pattern, oil coverage and churning losses.
Event
2014-10-15
. Modern vehicles are becoming increasingly complex – partially due to the growing requirement of transmissions that need optimisation of the gearshift process – examples being automated conventional and automatic transmissions, as well as double clutch and continuous variable transmissions (CVT). This increasing variety of configurations leads to complex development scenarios, that can manifest themselves as problematic issues affecting sensitive shift procedures – for example, a down-shift manoeuvre, that needs to be calibrated to provide seamless transition between ratios To assist in solving these problems, AVL has developed a tool chain and methodology, using powerful system architecture, to reproduce measure and model the problematic symptoms. In a particular case, the coast down shift from 3 to 2, in an automatic transmission with a high number of gears. One of the major tasks was to identify the quality problems that occur during a specific coast down shift manoeuvre whilst driving the vehicle on the road.
Event
2014-10-14
Event
2014-10-14
Event
2014-10-14
Viewing 1 to 30 of 5373

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