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Viewing 271 to 300 of 7399
2017-11-15
Event
In the past, vehicle hybridization often resulted in electrified powertrains with increased mass and size. This was accepted by the vehicle system because overall reduction in CO2 emissions and fuel consumption could still be achieved. With the increasing battery size in BEV/PHEV and the increasing demand for low cost electrification solution with minimum modification to base vehicle today, transmission engineers are challenged to deliver more package efficient hybrid transmission system. This presentation will discuss the possible solutions including hybrid system architecture, 48V system, and electric motor component technology for the weight reduction and its challenges.
2017-11-15
Event
Jaguar Land Rover has developed a revolutionary hybrid transmission that will both improve the efficiency of future vehicles and expand our all-wheel drive capability. The £30 million advanced research project, TRANSCEND, uses an innovative ultra-wide ratio spread architecture that integrates the functionality of a conventional transfer case (low-range gear box), dual-clutch transmission and hybrid technologies in to one single transmission unit, to deliver new levels of on and off-road performance with fuel economy improvements of nearly 10%. TRANSCEND is an advanced research project that combines innovative mechanical design and advanced manufacturing techniques to deliver a compact, lightweight eight-speed transmission with an ultra-wide ratio spread of 20, more than double that of a conventional eight-speed automatics.
2017-11-15
Event
This presentation will cover the status, outlook, and challenges for vehicle weight reduction. This will cover topics from weight trends in developed markets, as well as regulatory effects. These topics will then be evaluated for an understanding of what transmissions will be subjected to for sizing and capability, as well the focus on transmissions themselves for weight reduction.
2017-11-15
Event
2017-11-15
Event
Honda designed and developed an all-new FWD (front-wheel drive) 10-speed transmission. This new transmission is based on Honda original structure optimized for recently demands of improvement fuel economy and drivability, compactification to correspond to small FWD engine room layout. This transmission has four planetary gear sets, seven clutch & brake elements including a new forward and reverse switching technology. This new technology enables low friction and compactness. Also with optimized structure and direct control hydraulic control system, quick and smooth shift response is available.
2017-11-14
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2017-11-14
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2017-11-14
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2017-11-14
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2017-11-14
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Various technologies have been developed in recent years to make vehicles more environmentally friendly and easier to drive.
2017-11-14
Event
Driveline shudder occurred during power-on up-shifts is an undesirable phenomenon observed in some automatic transmissions. To understand the cause of this kind shudder, mode analysis is performed on various transmissions. The result shows a strong correlation between existence of a mode with low frequency and low damping ratio and existence of shudder problem. To reduce the shift shudder, a control method is proposed. The proposed method generates shudder reduction control signal, and add it to the oncoming clutch control command. The effectiveness and limitation of the proposed shudder reduction method is evaluated using dynamic simulation.
2017-11-14
Event
Traction batteries, used in electrified powertrains, have achieved considerable progress over the past ten years. This progress is driving a re-assessment of the development priorities for energy storage systems. This presentation discusses the transition in traction battery development priorities, currently being experienced within the Industry. Batteries used for both hybrid and plug-in applications will be addressed, as well as for low voltage systems. Factors discussed will include battery performance, cost, and safety. The roles of battery design, materials development and manufacturing processes will be contrasted.
2017-11-14
Event
2017-11-14
Event
A new generation of a planetary-gear-based automatic transmission system is designed with an increasing number of ratio steps. It requires synchronous actuation of multiple wet clutches, often more than 2 elements, in order to execute a complex shift sequence on demand. Accurate knowledge of clutch behaviors in actual vehicle environment is indispensable for achieving precise clutch controls and reducing shift calibration effort. Wet clutches are routinely evaluated on industry-standard SAE#2 tester during clutch design process. However, they do not correlate well with vehicle shift behaviors due to the limited reproducibility of realistic slip, actuator force profiles and lubrication conditions. Thus, it remains a challenge to substantiate bench test data in the absence of actual clutch behaviors observed in a vehicle. This article describes in-vehicle characterization of wet clutch engagement torque, with a focus on temperature effects during gear-ratio changing.
2017-11-14
Event
2017-11-14
Event
: The automotive industry continues to drive better fuel economy requirements for axles, transmissions, and wheel ends to meet aggressive 2025 U.S. CAFE standards, and their equivalent global regulations. As North America looks to newer future standards, and manufacturers in Europe and Asia migrate to a more globalized WLTP cycle, bearing manufacturers must be flexible to design unique solutions to effectively compete in the global marketplace. This technical presentation will cover fundamental bearing application and design knowledge to create unique, optimized, and efficient solutions to meet these varying and sometimes conflicting design targets.
2017-11-14
Event
2017-11-14
Event
Two-stroke diesel engines could be a promising solution for reducing carbon dioxide (CO2) emissions from light-duty vehicles. The main objective of this study was to assess the potential of two-stroke diesel engines in achieving a substantial reduction in CO2 emissions compared to four-stroke diesel baselines in conventional and hybrid electric light-duty vehicles. As part of this study, 1-D models were developed for the various engine concepts. Based on the engine models and an in-house vehicle model, projections were made for the CO2 emissions from two representative vehicle configurations - a conventional light-duty vehicle and a light-duty hybrid electric vehicle, over the US FTP-72 Cycle and the Highway Fuel Economy Test.
Viewing 271 to 300 of 7399