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Viewing 1 to 30 of 3430
2015-09-06
Technical Paper
2015-24-2526
Borislav Klarin, Thomas Resch, Chiara Sessarego, Giorgio Spanu, Gianni Lamonaca
Modern engines with low number of cylinders (I4, I3, I2) are typically equipped with a mass balancing unit to reduce free mass forces and moments and to keep powerunit vibrations, transferred via the mounts into the chassis, on an acceptable level and by that meet the required comfort quality. Typical disadvantages of mass balancing systems are increased friction, which reduces the engine efficiency, but also space, costs, increased complexity and negative effect on the engine acoustics. Especially the latter is defined by the design of the drive for the balancer unit. In many cases, this is realized by a gear drive, directly driven from the crankshaft. Therefore, special care has to be taken for the layout of this gear(s) to avoid potential rattle, gear tooth failure and negative noise transfer from gear contact to the housing structure (e.g. increased axial excitation due to selection of helix angle).
2015-06-30
Article
Off-highway machine mounting systems, especially the cab mounting system, significantly affect the operator comfort in the cab by providing enough damping for a good ride and isolating the structure-borne forces from traveling into the cab.
2015-06-29
WIP Standard
J1555
This SAE Recommended Practice applies to all portions of the vehicle, but design efforts should focus on components and systems with the highest contribution to the overall average repair cost (see 3.7). The costs to be minimized include not only insurance premiums, but also out-of-pocket costs incurred by the owner. Damageability, repairability, serviceability and diagnostics are inter-related. Some repairability, serviceability and diagnostics operations may be required for collision or comprehensive loss-related causes only, some operations for non-collision-related causes only (warranty, scheduled maintenance, non-scheduled maintenance, etc.), and some for both causes. The scope of this document deals with only those operations that involve collision and comprehensive insurance loss repairs.
2015-06-18
Article
Passenger Experience automates cabin completion processes with essential intelligent “building blocks” capturing rules, regulations, and manufacturing knowledge to automate cabin interior design, development, and delivery.
2015-06-15
Technical Paper
2015-01-2187
Mark A. Gehringer, Keith Thompson
Abstract This paper describes the development of a semi-automated end-of-line driveline system balance tester for an automotive assembly plant. The overall objective was to provide final quality assurance for acceptable driveline noise and vibration refinement in a rear wheel drive vehicle. The problem to be solved was how to measure the driveline system unbalance within assembly plant constraints including cycle time, operator capability, and integration with a pre-existing vehicle roll test machine. Several challenging aspects of the tester design and development are presented and solutions to these challenges are addressed. Major design aspects addressed included non-contacting vibration sensing, data acquisition/processing system and vehicle position feedback.
2015-06-15
Journal Article
2015-01-2336
Anastasios Arvanitis, Jeff Orzechowski, Todd Tousignant, Kiran Govindswamy
Abstract Automotive companies are studying to add extra value in their vehicles by enhancing powertrain sound quality. The objective is to create a brand sound that is unique and preferred by their customers since quietness is not always the most desired characteristic, especially for high-performance products. This paper describes the process of developing a brand powertrain sound for a high-performance vehicle using the DFSS methodology. Initially the customer's preferred sound was identified and analyzed. This was achieved by subjective evaluations through voice-of-customer clinics using vehicles of similar specifications. Objective data were acquired during several driving conditions. In order for the design process to be effective, it is very important to understand the relationship between subjective results and physical quantities of sound. Several sound quality metrics were calculated during the data analysis process.
2015-06-12
Article
Small, electrically driven propellers spaced along wing leading-edges could benefit both small and medium-size aircraft
2015-06-12
Standard
AS9014A
These requirements are applicable to IAQG sector schemes when making use of ABs, CRBs and their auditors, for the assessment and certification/registration of supplier quality systems in accordance with the requirements of this document. The quality management system standard used by the CRB shall be 9100/9110/9120, as appropriate to the supplier's activities. It shall be applied to the supplier's complete Quality System that covers aerospace products. Sectors may use these requirements for other standards. IAQG members have committed to recognize the equivalence of certification/registration of a suppliers quality management system to either of the AS, EN or JISQ/SJAC standards. This AS provides the approval process for Auditor Authentication Bodies (AAB), training course providers, trainers and auditors who meet the requirements of AIR5493 and outlines the America's sector specific process to implement AS9104. This document is created to be in conformance with AS9104.
2015-06-09
Article
New surface scanning technology is being utilized by rFpro to produce digital road models with unprecedented accuracy and speed to help make autonomous driving safer.
2015-06-09
Article
To reduce cost and improve performance in engines, Honeywell is offering a software tool to embed virtual sensors in engines, using first-principles models that resides in the engine control unit.
2015-06-09
Article
The AUTOSAR standard is all about improving embedded electronic systems in vehicles, but did you know that it also promotes the early testing of software code? The early testing and validation of embedded software reduces the number of ECU prototypes and additional test systems needed down the road, and it benefits the whole development process.
2015-06-09
Article
For the design process of the class of aircraft known as an efficient supersonic air vehicle, particular attention must be paid to the propulsion system design as a whole, including installation effects integrated into a vehicle performance model.
2015-05-19
Standard
AS9132B
This standard defines uniform quality and technical requirements relative to metallic parts marking performed using "data matrix symbology" within the aviation, space, and defense industry. ISO/IEC 16022 specifies general requirements (e.g., data character encodation, error correction rules, decoding algorithm). In addition to ISO/IEC 16022 specification, part identification with such symbology is subject to the requirements in this standard to ensure electronic reading of the symbol. The marking processes covered by this standard are as follows: - Dot Peening - Laser - Electro-Chemical Etching Further marking processes will be included, if required. Unless specified otherwise in the contractual business relationship, the company responsible for the design of the part shall determine the location of the data matrix marking. Symbol position should allow optimum illumination from all sides for readability. This standard does not specify information to be encoded.
2015-05-14
Article
The newly named Johnson Controls Vehicle Engineering Laboratory, on the Lawrence Technological University campus in Michigan, will serve the energy-storage-system supplier and benefit LTU engineering students.
2015-05-06
WIP Standard
AMS2631E
This specification covers the procedure for ultrasonic inspection of wrought titanium and titanium alloy products 0.25 inch (6.4 mm) and over in cross-section (thickness) or diameter.
2015-05-05
Article
At Intermat, LiuGong announced that it was in a 60-day countdown before its new Global Research and Development Center opens in June at Liuzhou, also home to the company's global headquarters.
2015-04-30
Article
New AWD systems from BorgWarner and Honda deliver significant improvements in efficiency, as well as vehicle dynamic performance.
2015-04-29
Article
One of the key differentiators of the EP-8100 for commercial and military simulation and training is the system’s ability to use customers’ existing databases.
2015-04-28
Article
EM Test now offers the VDS 200Q Series, a four-quadrant voltage drop simulator that can source and sink current using a programmed voltage in both positive and negative polarities.
2015-04-24
Article
Julabo introduces two additional highly dynamic temperature control systems: the process circulators Presto A45 and A45t.
2015-04-24
Article
Boeing is in the midst of several months of flights with its ecoDemonstrator 757 in a first-round effort to evaluate new technologies in 2015 that are expected to reduce environmental effects on natural laminar flow as a way to improve aerodynamic efficiency while reducing noise and carbon emissions.
2015-04-24
Article
The engine bay is an essential component of the AgustaWestland AW609 tilt rotor nacelle, since it determines the performance of the engine and assures safe maneuvers for every flight condition.
2015-04-21
Article
Schmitt Industries announces availability of the AR 2000 line, with special capabilities for distance measurement on hot surfaces—e.g., red hot, glowing steel, and for outdoor use in bright lighting conditions with high constant or stray light levels.
2015-04-15
Article
Given the pace of innovation, the goal of autonomy and automation will force more and more features into the electronics of off-highway vehicles, according to Ian Fountain, NI's Director of Application Segments.
2015-04-15
WIP Standard
AMS2451/9C
This specification covers the requirements for brush plating of zinc-nickel by electrodeposition.
2015-04-14
Collection
This collection of technical papers will address theoretical developments and automotive applications in RBDO and Robust Design. Topics include: computational algorithms for efficient estimation of reliability, Monte Carlo simulation, Bayesian reliability, Dempster-Shafer Evidence Theory, and Multi-Disciplinary Optimization, among others.
2015-04-14
Technical Paper
2015-01-1473
Kalu Uduma, Dipu Purushothaman, Darshan Subhash Pawargi, Sukhbir Bilkhu, Brian Beaudet
Abstract NHTSA issued the FMVSS 226 ruling in 2011. It established test procedures to evaluate countermeasures that can minimize the likelihood of a complete or partial ejection of vehicle occupants through the side windows during rollover or side impact events. One of the countermeasures that may be used for compliance of this safety ruling is the Side Airbag Inflatable Curtain (SABIC). This paper discusses how three key phases of the optimization strategy in the Design for Six Sigma (DFSS), namely, Identify; Optimize and Verify (I_OV), were implemented in CAE to develop an optimized concept SABIC with respect to the FMVSS 226 test requirements. The simulated SABIC is intended for a generic SUV and potentially also for a generic Truck type vehicle. The improved performance included: minimization of the test results variability and the optimization of the ejection mitigation performance of the SABIC.
2015-04-14
Technical Paper
2015-01-0238
Nick Smith
Abstract Manufacturing companies are benefiting from technology in most key areas of the flow from design through manufacture. This applies to the wire harness industry which is a key element of the modern automotive industry. Wire harness manufacturing engineering, however, is a critical path function that is under severe pressure and yet has been under-served by technology. In some respects it has become the weak link in the chain. Recent innovations in commercial off-the-shelf (COTS) technology are set to change this situation. Software applications are now available to deliver transformational manufacturing engineering automation as well as being able to integrate with technology in other areas of the process. This will enable a digitally continuous data flow that can remove excessive cost, time, and pressure - while helping manufacturers meet the increasing demands of the industry.
2015-04-14
Technical Paper
2015-01-0363
Vasanth Balashunmuganathan, Ramakrishna Nukala, Sathishkumar Sampath Kumar, Murali Govindarajalu
In recent years clearing the mist on side windows is one of the main criterions for all OEMs for providing comfort level to the person while driving. Visibility through the side windows will be poor when the mist is not cleared to the desired level. “Windows fog up excessively/don't clear quickly” is one of the JD Power question to assess the customer satisfaction related to HVAC performance. In a Mobile Air Conditioning System, HVAC demister duct and outlet plays an important role for removing the mist formation on vehicle side window. Normally demister duct and outlet design is evaluated by the target airflow and velocity achieved at driver and passenger side window. The methodology for optimizing the demister outlet located at side door trim has been discussed. Detailed studies are carried out for creating a parametric modeling and optimization of demister outlet design for meeting the target velocity.
2015-04-14
Journal Article
2015-01-0420
Musarrat Jehan, Efstratios Nikolaidis
Abstract There is randomness in both the applied loads and the strength of systems. Therefore, to account for the uncertainty, the safety of the system must be quantified using its reliability. Monte Carlo Simulation (MCS) is widely used for probabilistic analysis because of its robustness. However, the high computational cost limits the accuracy of MCS. Smarslok et al. [2010] developed an improved sampling technique for reliability assessment called Separable Monte Carlo (SMC) that can significantly increase the accuracy of estimation without increasing the cost of sampling. However, this method was applied to time-invariant problems involving two random variables. This paper extends SMC to problems with multiple random variables and develops a novel method for estimation of the standard deviation of the probability of failure of a structure. The method is demonstrated and validated on reliability assessment of an offshore wind turbine under turbulent wind loads.
Viewing 1 to 30 of 3430

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