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UDM Tip Temperature Control using Thermosyphon Principle

Mahindra & Mahindra, Ltd.-Samson Solomon, Rajesh Thiyagarajan, Parvej Khan
  • Technical Paper
  • 2020-28-0040
To be published on 2020-04-30 by SAE International in United States
In today’s automobile industry where BS6 is posing a high challenge and with limited timeline. The main target is to provide the cooling system to have less impact on the in terms of cost, weight and meeting challenging engineering requirement. Thus, the frugal engineering comes into the picture. An important technology that has come into highlight in recent years is the application of thermosyphon principle for UDM injector cooling thereby reducing the rotation parts and power consumption such as an electric pump. Thermosyphon is a method of passive heat exchange and is based on natural convection, which circulates a fluid without the necessity of a mechanical or electric pump. The natural convection of the liquid commences when heat transfer to the liquid gives rise to a temperature difference from one side of the loop to the other. The Flow through the UDM is maintained by changing Temperature (hence density) of the fluid at one end using the force airflow. The main objective of the UDM cooling is to keep the UDM tip temperature below 120…
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Unsettled Technology Opportunities for Vehicle Health Management and the Role for Health-Ready Components

VHM Innovations LLC-Steve Holland
  • Research Report
  • EPR2020003
Published 2020-03-17 by SAE International in United States
Game-changing opportunities abound for the application of vehicle health management (VHM) across multiple transportation-related sectors, but key unresolved issues continue to impede progress. VHM technology is based upon the broader field of advanced analytics. Much of traditional analytics efforts to date have been largely descriptive in nature and offer somewhat limited value for large-scale enterprises. Analytics technology becomes increasingly valuable when it offers predictive results or, even better, prescriptive results, which can be used to identify specific courses of action. It is this focus on action which takes analytics to a higher level of impact, and which imbues it with the potential to materially impact the success of the enterprise. Artificial intelligence (AI), specifically machine learning technology, shows future promise in the VHM space, but it is not currently adequate by itself for high-accuracy analytics. The recent push for health-ready components offers hope in resolving some of the issues slowing the implementation of VHM technology. Health-ready components are those components that provide the necessary functionality or information to allow them to be gracefully integrated into…
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Maintenance of Pitot-Static Systems of Transport Aircraft

A-4 Aircraft Instruments Committee
  • Aerospace Standard
  • AIR975B
  • Current
Published 2020-02-20 by SAE International in United States
In efforts to increase the accuracy and reliability of altimetry, speed measurement and other aspects of air data, a great deal of attention and money have been expended on new and refined pressure transducing and computing systems and on the standards by which they are calibrated. So much progress has been made in this that the limiting factor is, or may soon be, the sensing and transmitting in the aircraft of the pressures to be transduced. Until the appearance of References 1-13 and 18 there was little guidance available on the maintenance of pitot and static systems. This report presents what information is available, suggests limits, and lists the principal original papers on the subject.
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Superior Interiors

Autonomous Vehicle Engineering: January 2020

Bill Visnic
  • Magazine Article
  • 20AVEP01_03
Published 2020-01-01 by SAE International in United States

New-mobility thinking is changing how vehicle interiors will work for everyone.

Future-vehicle interior renderings have always stoked our imaginations for what may be possible in the cabin environment. Automated vehicle (AV) developments, including high-function driver assistance features and mobility as a service (MaaS), are bringing new dimensions to those possibilities.

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Unsettled Impacts of Integrating Automated Electric Vehicles into a Mobility-as-a-Service Ecosystem and Effects on Traditional Transportation and Ownership

International Transportation Innovation Center (ITIC)-Joachim Taiber
Tallinn University of Technology-Raivo Sell
  • Research Report
  • EPR2019004
Published 2019-12-20 by SAE International in United States
The current business model of the automotive industry is based on individual car ownership, yet new ridesharing companies such as Uber and Lyft are well capitalized to invest in large, commercially operated, on-demand mobility service vehicle fleets. Car manufacturers like Tesla want to incorporate personal car owners into part-time fleet operation by utilizing the company’s fleet service. These robotaxi fleets can be operated profitably when the technology works in a reliable manner and regulators allow driverless operation.Although Mobility-as-a-Service (MaaS) models of private and commercial vehicle fleets can complement public transportation models, they may contribute to lower public transportation ridership and thus higher subsidies per ride. This can lead to inefficiencies in the utilization of existing public transportation infrastructure. MaaS platforms can also cause a reduced reliance on parking infrastructure (e.g., street parking lanes and parking garages) which can contribute to an improvement in overall traffic flow, and a reduction in capital investment for commercial and residential real-estate development. Urban planning can be better centered around the true mobility needs of the citizens without sacrificing valuable…
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REPAIR SLEEVE, LARGE WIRE/CABLE INSULATION DAMAGE, ELECTRIC, PERMANENT, ENVIRONMENT RESISTANT, 260 °C MAXIMUM OPERATING TEMPERATURE, TYPE II

AE-8C2 Terminating Devices and Tooling Committee
  • Aerospace Standard
  • AS6224/2
  • Current
Published 2019-11-11 by SAE International in United States
No Abstract Available.
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New-Vehicle Collision Repair Information

Motor Vehicle Council
  • Ground Vehicle Standard
  • J2376_201910
  • Current
Published 2019-10-28 by SAE International in United States
This SAE Recommended Practice defines the various types of information required by the collision repair industry to properly restore light-duty, highway vehicles to their pre-accident condition. Procedures and specifications are defined for damage-related repairs to body, mechanical, electrical, steering, suspension, and safety systems. The distribution method and publication timeliness are also considered.
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Uniform Reference and Dimensional Guidelines for Collision Repair

Motor Vehicle Council
  • Ground Vehicle Standard
  • J1828_201910
  • Current
Published 2019-10-28 by SAE International in United States
This SAE Recommended Practice defines, for vehicle manufacturers and collision information and equipment providers, the types of vehicle dimensional data needed by the collision repair industry and aftermarket equipment modifiers to properly perform high-quality repairs to damaged vehicles. Both bodyframe and unitized vehicles, including passenger cars and light trucks, are addressed.
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OEM Plastic Parts Repair

Motor Vehicle Council
  • Ground Vehicle Standard
  • J1573_201910
  • Current
Published 2019-10-24 by SAE International in United States
This SAE Recommended Practice defines the information required to repair the various types of plastics found on modern light-duty highway vehicles. Information is included for the repair and refinishing of most plastic body parts, both interior and exterior. Repair information is described for all commonly used plastics including, but not limited to, polyurethanes, polycarbonate blends, modified polypropylenes, polyethylenes and nylons. Repairs can be made to these types of plastics using two-part (2K) repair adhesives, plastic welding, and other materials available from body shop suppliers. When a new type of plastic is being introduced to the market through a new vehicle program, specific repair and refinishing procedures should be provided, following the format in this document. Sheet-molded compounds (SMC), fiber-reinforced plastics (FRP) and carbon fiber reinforced plastics can also be repaired using slightly different procedures and repair materials.
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The Right Stuff for Aging Electronics/Intermittence/No Fault Found

Universal Synaptics-Hector I. Knudsen
Published 2019-09-16 by SAE International in United States
For those in the avionics repair and maintenance business, the acronyms NFF (No Fault Found), NTF (No Trouble Found), and CND (Cannot Duplicate) are, unfortunately, all too familiar terms. After several decades of frustration with this illusive phenomenon, it continues to consume an enormous amount of test and diagnostic effort and is the source of considerable cost and discomfort within the multi-level avionics repair model.There are undoubtedly many causes of NFF and all of them should be addressed. The question is: Where do you start and which solution will be the most beneficial?Our particular efforts have focused on the literal or statistical analysis of NFF, recognizing that if the system’s MTBF (Mean Time Between Failure) has decreased, or if the device's NFF rate has increased with age and deterioration, a physical fault is most likely present. However, if it isn’t found during conventional testing then it probably only fails intermittently. Similarly, having an intermittent failure mode, it in all probability cannot be detected or diagnosed at testing time because of known and demonstrated limitations in…
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