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Viewing 121 to 150 of 23978
2016-04-05
Technical Paper
2016-01-0890
Richard Butcher
Measurement of lubricant related fuel economy with internal combustion [IC] engines presents technical challenges, though it does offer worthwhile insights into CO2 reduction. As engine technology progresses, large benefits become harder to find; so the importance of precise fuel economy measurement increases. Responding to the challenge of meeting CO2 targets, there are many successful areas of development currently for the IC engine; including downsizing/rightsizing, mechanical efficiency, advanced charging and combustion systems, thermal management, sophisticated electronic control and calibration. These technologies have been deployed against a back-drop of increasingly stringent criteria pollutant emission limits. The search for ever smaller improvements combined with growing engine and vehicle technology complexity significantly increases the challenge of producing high quality data.
2016-04-05
Technical Paper
2016-01-0499
Xu Zhang, Jennifer Johrendt
Successful manufacture of Carbon Fibre Reinforced Polymers (CFRP) by Long-Fibre Reinforced Thermoplastic (LFT) processes requires knowledge of the effect of numerous processing parameters such as temperature set-points, rotational machinery speeds, and matrix melt flow rates on the resulting material properties after the final compression moulding of the charge is complete. The degree to which the mechanical properties of the resulting material depend on these processing parameters is integral to the design of materials by any process, but the case study presented here highlights the manufacture of CFRP by LFT as a specific example. The material processing trials are part of the research performed by the International Composites Research Centre (ICRC) at the Fraunhofer Project Centre (FPC) located at the University of Western Ontario in London, Ontario, Canada.
2016-04-05
Journal Article
2016-01-0806
James Sevik, Michael Pamminger, Thomas Wallner, Riccardo Scarcelli, Ronald Reese, Asim Iqbal, Brad Boyer, Steven Wooldridge, Carrie Hall, Scott Miers
In recent times, interest in natural gas as a fuel for light-duty transportation has increased due to its domestic availability and lower cost relative to gasoline. Natural gas, comprised mainly of methane, has a higher knock resistance than gasoline making it advantageous for high load operation. However, the higher resistance to knock can cause ignitability issues at part-load operation leading to an increase in the initial flame development process. Part-load exhaust gas recirculation tolerance can also be affected by the lower flame speed of natural gas. While port-fuel injection of natural gas can lead to a loss in power density due to the displacement of intake air, injecting natural gas directly into the cylinder can reduce such losses. A study was designed and performed to evaluate the potential of natural gas for use as a light-duty fuel.
2016-04-05
Technical Paper
2016-01-0833
Lei Meng, Yuqiang Li, Karthik Nithyanandan, Timothy Lee, Chunnian Zeng, Chia-Fon Lee
To face the challenges of fossil fuel shortage and air pollution problems, there is growing interest in the potential usage of alternative fuels such as bio-ethanol and bio-butanol in internal combustion engines. The literature shows that the acetone in the Acetone-Butanol-Ethanol (ABE) blends plays an important part in improving the combustion performance and emissions, owing to its higher volatility. In order to study the effects of acetone addition into commercial gasoline, this study focuses on the differences in combustion, performance and emission characteristics of a port-injection spark-ignition engine fueled with pure gasoline (G100), ethanol-containing gasoline (E30) and acetone-ethanol-gasoline blends (AE30 at A:E volumetric ratio of 3:1). The tests were conducted at 1200RPM with the default calibration (for gasoline), at 3 bar and 5 bar BMEP under various equivalence ratios.
2016-04-05
Technical Paper
2016-01-0045
Takanori Uno, Akahori Ichiro, Yoichiro Hara
In this paper, consideration is made to create a simulation model of BCI test method, which is one of the EMC evaluation methods for in-vehicle electronic devices, and an intrinsic model of BCI probe is provided. Using this model, it is demonstrated that when the impedance of the BCI probe is sufficiently high, the BCI probe serves as a transformer with the coil turn ratio of 1:1, and the admittance of a line or a load connected to each wire becomes proportional to the magnitude of current flowing each wire. This model also can be applied when leakage inductance inside the BCI probe is taken into consideration. The validity of this model is verified by the experiment using a jig which can clamp multiple wires. In addition, by using this model, it is demonstrated that S-parameters when dozens of wires are clamped with the BCI probe can be generated from the measurement results of S-parameters when one wire is clamped.
2016-04-05
Technical Paper
2016-01-1549
Nicola Bartolini, Lorenzo Scappaticci, Francesco Castellani, Alberto Garinei
The knocking noise is a transient structural noise triggered by the shock absorber's piston rod vibrations that excites the vibration of chassis components. Piston rod vibrations can be caused by valves motion (opening and closing) and dry friction during stroke inversions. This study investigates the shock absorber knocking noise on a twintube gas-filled automotive shock absorber and the aim is to define an acceptance criterion (threshold level) for a sample check of the component. If infact the damper derives from a large mass production, may happen that small differences in the assembly might lead to different behaviours resulting in higher or lower levels of knocking noise. To achieve the goal, experimental tests were carried out at various excitation frequencies and amplitudes. Test were performed using a oleodynamic test bench monitoring displacement and force; accelerometers were placed in proximity of the rebound valve, on the body of the damper and on the piston rod.
2016-04-05
Technical Paper
2016-01-1594
Petter Ekman, Roland Gardhagen, Torbjorn Virdung, Matts Karlsson
Considerable amounts of the everyday goods transport in Sweden is done with light trucks. In the last ten years (2005-2015) the number of light trucks has increased by 33% in Sweden. The majority of these light trucks are fitted with a swapbody, and encounter the same problem as many other truck configurations, namely that several different manufacturers contribute to the final shape of the vehicle. Due to this, the aerodynamics of the final vehicle is often not fully considered, hence there appear to be room for improving the aerodynamic performance. The flow around a light truck fitted with a swapbody has been investigated with use of Computational Fluid Dynamics (CFD). Focus has been on improving the swapbody shape in order to reduce the aerodynamic drag and the fuel consumption, but still keeping it usable for daily operations.
2016-04-05
Technical Paper
2016-01-0441
Aref M. A. Soliman
ABSTRACT An active suspension system has better performance than a passive suspension. However, it requires a significant amount of energy and is constructed from high cost components. To solve the problem of the power required, a switchable damper suspension system has been studied. In this paper, control strategies for the switchable damper suspension system and passive are compared in terms of their relative ride performance capabilities. Practical limitations involving switching time delay and threshold delay values are modeled and their effect on the ride performance are evaluated. The four setting switchable damper is compared with the two and three setting switchable dampers. The control strategies are used to maintain suspension working space level within design limit and to minimize body acceleration level. The results showed that the four setting switchable damper gives better ride improvements compared with the two and three setting switchable dampers.
2016-04-05
Technical Paper
2016-01-1191
Saher Al Shakhshir, Torsten Berning
Proton exchange membrane fuel cells (PEMFC’s) are currently being commercialized for various applications ranging from automotive (e.g. the Toyota Mirai) to stationary such as powering telecom back-up units. In PEMFC’s, oxygen from air is internally combined with hydrogen to form water and produce electricity and waste heat. One critical technical problem of these fuel cells is still the water management: the proton exchange membrane in the center of these fuel cells has to be hydrated in order to stay proton-conductive while on the other hand excessive liquid water can lead to cell flooding and increased degradation rates. Clearly, a fundamental understanding of all aspects of water management in PEMFC is imperative. This includes the fuel cell water balance, i.e. which fraction of the product water leaves the fuel cell via the anode channels versus the cathode channel.
2016-04-05
Technical Paper
2016-01-1559
Francesco Vinattieri, Tim Wright, Renzo Capitani, Claudio Annicchiarico, Giacomo Danisi
Nowadays, the common steering systems are no more able to satisfy the customers’ requirements and this has caused the spread of electrical controlled steering systems. Their application is possible only after a proper tuning of the control system, which is essential to guarantee the desired functioning; but to fulfil this purpose an appropriate knowledge of all the influencing factors of steering torque feedback is necessary. The limited repeatability of vehicle tests, as well as their high cost, are the main drawbacks of vehicle tests and lead to using specific test rigs. On account of that, in the present work a test bench for steering feeling simulation, which combines a static driving simulator with a physical EPS assisted steering rack, has been designed. The end goal is to more accurately reproduce the tactile feedback to the driver by including a physical hardware in lieu of complicated and difficult to obtain software models.
2016-03-27
Technical Paper
2016-01-1720
Anurag Durve, Jyotirmoy Barman, Rizwan Khan
Direct injection compression ignition engines have proved to be the best option in light duty applications but rapid depleting sources of conventional fossil fuels, their rising prices and ever increasing environmental issues are the major concerns. Alternate fuels, particularly bio fuels are receiving increasing attention during the last few years. Biodiesel has already been commercialized in the transport sector. In the present work, a turbocharged, intercooled, DI diesel engine has been alternatively fuelled with biodiesel and its 20% blend with commercial diesel. The effect of biodiesel addition to diesel on engine performance, combustion, and emissions were studied in a turbocharged, high-pressure common rail diesel engine. Biodiesel/diesel blends with different biodiesel fractions were used and compared with neat biodiesel and diesel at different engine loads and speeds.
2016-02-11
WIP Standard
J2087
This SAE Standard provides test procedures, requirements, and guidelines for a daytime running light (DRL) function.
2016-02-11
Standard
AMS2642E
This specification covers a procedure for revealing the macrostructure and microstructure of selected titanium alloys.
2016-02-08
WIP Standard
AIR6384
This SAE Aerospace Information Report (AIR) is intended to provide guidance for installing GFI/AFCB in the fuel pumps power circuits for protection of fuel vapors ignition inside the tank in case of a failure that causing arcing inside the pump. Besides, this AIR is also intended to provide minimum specification and testing for ground fault interrupter (GFI) and arc fault circuit breaker (AFCB), addressing the issues associated with the verification requirements based on current regulatory guidance per AC25.981-1C.
2016-02-08
WIP Standard
AS7928/15
A CLASS 1 FLAG SHAPE, UN-INSULATED COPPER TERMINAL FOR CRIMPING ON WIRE SIZE 14 THRU 22 WITH STANDARD TOOLS.
2016-02-05
Magazine
Off-highway hybrids: Opportunities and challenges With oil prices declining and emissions regulations in North America 'stabilized,' is there a place for hybrid powertrains in this new world of cheap oil? Looking for a better image Display advances are helping to reduce operator fatigue. Charging up electrified powertrains Control technologies race forward while batteries improve and adopt standard sizes. Measuring and accounting for suspension TARDEC teamed with SEA Ltd. to develop a system to measure the suspension parameters, center of gravity, and moments of inertia of wheeled vehicles in the never ending quest to model and predict vehicle dynamic behavior. Looking at mobility in 2050 Cuneyt L. Oge begins his term as 2016 SAE International President with a vision about the future of auto- and aero-mobility.
2016-02-04
Standard
J1542_201602
This SAE Recommended Practice is applicable to all liquid-to-air, liquid-to-liquid, air-to-liquid, and air-to-air heat exchangers used in vehicle and industrial cooling systems. This document outlines the tests to determine durability characteristics of the heat exchanger under thermal cycling.
2016-02-03
Article
Britain has established a real-world test highway for connected and autonomous vehicle technologies. JLR is one of the companies investing in the 66-km-long R&D route.
2016-02-03
WIP Standard
AS36102B
This SAE Aerospace Standard (AS) provides requirements on how to test air cargo Unit Load Devices (ULD).
2016-02-03
Magazine
Baking in protection With vehicles joining the Internet of Things, connectivity is making cybersecurity a must-have obligation for automotive engineers, from initial designs through end-of-life. New Engines 2016 Highlighting the design, engineering, and technologies inside some of the most competitive new gasoline and light-duty diesel ICEs. Citizen of the world Cuneyt L. Oge begins his term as 2016 SAE International President with a vision about auto-mobility and aero-mobility 2050. CES rollouts extend connectivity, app integration Ford looks to spread Corning's new lightweight Gorilla Glass beyond the 2017 GT New 40%-scale wind tunnel increases GM's aero-development capacity Surface Generation speeds composites throughput with one-shot stamp-forming process 2017 Cadillac XT5 debuts GM's new lightweight crossover architecture Porsche and Bentley plan electric future
2016-02-02
Article
Imetrum’s precision, noncontact 3D measurement system, the Precision Displacement Tracker, slashes setup times and provides richer data sets without compromising measurement resolution or sampling speed.
2016-02-02
Article
Intertek’s Milton Keynes Transportation Technologies laboratory has developed a portable vehicle exhaust emissions testing system that enables manufacturers to report real-world driving emissions.
2016-02-02
Article
EngineLab’s EL129 control units for engine simulation and testing have a range of input and output options and can be adapted for flexible control system development.
2016-02-02
WIP Standard
AS6376
NEW PART STANDARDS TO BE ADDED TO THE PART FAMILY LISTS PER THE REQUIREMENTS OF AS4459
2016-02-01
Technical Paper
2016-28-0102
Vinayak Jadhav, Shubham Kanchan, Sukrut Thipse, Kishorkumar Kavathekar, Ashwin Dsouza, Shailesh Sonawane
Abstract Environmental pollution has proven to be a big threat to our eco-system and pollution from automobiles using conventional fuels is a major contributor to this. Alternative fuels are the only immediate option that can help us counter the ever rising environmental pollution. In today’s date we cannot directly replace an IC engine, so the most efficient option available is using a fuel that can work with the IC engines other than gasoline and diesel. CNG proves to be the most promising fuel. A diesel engine converted to stoichiometric CNG engine was used for optimization. The paper deals with the improvement of engine power from 50HP to 60HP and up-gradation of the emission from BS-III to BS-IV norms of a multi-cylinder naturally aspirated engine. This was achieved by varying the compression ratio, valve-lift profile, intake plenum volume, runner length, spark-advance timing, fuel injection location, exhaust pipe length and catalytic converter selection.
2016-02-01
Technical Paper
2016-28-0171
Kaushal Kumar Darpkar, Anand Bidre
Abstract Primary function of a drive half shaft is to transfer torque from transaxle to the wheels in East West configuration powertrain vehicles. Conventional practice is to consider either 1st gear max torque or the Wheel slip torque, whichever being the maximum as design torque. However vehicle dynamics and Powertrain characteristics have a major influence on the Driveshaft torque and the torques experienced can thus go beyond the design torque. This questions the design endurance limit for the driveshaft based on conventional design. One such situation is the torque experienced by the driveshaft during vehicle coasting condition with gear downshift. The torque experienced in such a scenario can go beyond the maximum design torque leading to failure as was observed in Vehicle level validation test.
2016-02-01
Technical Paper
2016-28-0168
Prashant Shinde, Omprakash Kota
Abstract Increasing demand of Electric and Hybrid vehicles questions more about Reliability and Lifetime of electronic circuits associated with them. It is very important for a hardware circuit designer to evaluate if module will last the expected lifetime. This paper elaborates the methods and steps to find the expected lifetime of critical components; and to decide whether Hybrid Power Electronics Unit (PEU) will meet the OEM requirements on lifetime. Accelerated thermal stress method is used to determine the required High Temperature Operational Life (HTOL) hours for given thermal profile of Hybrid vehicle passenger car in driving (8,000Hrs), charging(30,000Hrs) and total lifetime (38000Hrs ≈ 15Years). Example calculation of required HTOL hours against expected lifetime for critical component from Hybrid ECUs is explained in this paper. Also inclusions and exclusions of this method in evaluating lifetime assessment are also discussed here.
Viewing 121 to 150 of 23978

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