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Passenger Car Side Door Latch Systems

Motor Vehicle Council
  • Ground Vehicle Standard
  • J839_201910
  • Current
Published 2019-10-09 by SAE International in United States
This SAE Recommended Practice establishes minimum performance requirements and test procedures for evaluating and testing passenger car side door latch systems. It is limited to tests that can be conducted on uniform test fixtures and equipment in commercially available laboratory test facilities. The test procedures and minimum performance requirements outlined in this document are based on currently available engineering data. It is intended that all portions of the document will be periodically reviewed and revised, as additional knowledge regarding vehicle latch performance under impact conditions is developed.
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Measuring Stickiness of Microscale Surfaces

  • Magazine Article
  • TBMG-35124
Published 2019-09-01 by Tech Briefs Media Group in United States

At the scale of bridges or buildings, the most important force that engineered structures need to deal with is gravity. But at the scale of microelectro-mechanical systems (MEMS) — devices like the tiny accelerometers used in smartphones — the relative importance of gravity decreases and adhesive forces become more important.

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Effect of Using Exhaust Gas Recirculation (EGR) on the Emission Characteristics of the CI Engine Fuelled by Acetone-Butanol-Ethanol (ABE) Diesel Blends

CASRAE, Delhi Technological University-Aahan Malhotra, Mukesh Yadav, Mukul Tomar, Shikhar Jain
Delhi Technological University-Naveen Kumar
Published 2019-04-02 by SAE International in United States
The power generation, agriculture, and transportation sectors are dominated by diesel engines due to better thermal efficiency and durability. Diesel engines are also a major contributor to the air pollutants such as NOx and particulate matter. Acetone-butanol-ethanol (ABE) is considered a promising alternative fuel as it emits less pollutants compared to conventional fuels. In current work, the ABE used was of the ratio (3:6:1) and four samples were prepared for engine trial ABE (10%90%diesel), ABE (20%80%diesel), ABE (30%70%diesel) and ABE (40%60%diesel). Their physio-chemical properties like kinematic viscosity, density, specific gravity and calorific value were checked and tested on compression ignition engine at different operating parameters. The experimental work was conducted upon Kirloskar 4-stroke single cylinder, vertical, air-cooled 661cc compression ignition engine at different speeds and loads. The operational parameters taken were injection temperature, injection pressure and injection timings. The main aim of the current work is to find the effect of exhaust gas recirculation (EGR) on the emission characteristics of acetone-butanol-ethanol (ABE) blends with diesel in compressed ignition engine. Exhaust gas recirculation (EGR) is a…
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Standard Oil Filter Test Oil

Filter Test Methods Standards Committee
  • Ground Vehicle Standard
  • J1260_201901
  • Current
Published 2019-01-16 by SAE International in United States
This SAE Standard defines the requirements for an oil to be used in the SAE HS 806 Oil Filter Test Procedures.
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Space Debris Orbit and Attitude Prediction for Enhanced and Efficient Space Situational Awareness

  • Magazine Article
  • TBMG-33025
Published 2018-10-01 by Tech Briefs Media Group in United States

This research deals with the problem of modelling the orbit and attitude motion of uncontrolled manmade objects in orbit about the Earth, which tumble due to the natural influences of the near-Earth space environment. A mathematical, physics-based and computational approach is taken to model the forces and torques that drive the orbit and attitude evolution of such objects. The main influence modelled is solar radiation pressure (SRP), which is the interaction of solar electromagnetic radiation with the surface of an object, leading to both forces and torques that influence the orbital and attitude motion. Other influences, such as the gravitational field of the Earth, are also modelled.

Active Response Gravity Offload System

  • Magazine Article
  • TBMG-29696
Published 2018-07-01 by Tech Briefs Media Group in United States

NASA has used two systems to train astronauts for weightlessness. The first is the Reduced Gravity Simulator that suspended the astronaut at an angle of 80.5 so that only 1/6th of his or her weight was supported by the ground, while the rest was supported by a pulley system. The other system, designed during the Apollo era, is the Partial Gravity Simulator (POGO), which uses an air-controlled piston along with air bearings and gimbals to simulate reduced gravity. This pneumatic system is attached to an air-bearing rail to allow for maneuverability in two dimensions. POGO was used to train astronauts on how to use tools and other hardware in microgravity.

All-in-One Lab Device Gets New Instruments via Software Update

  • Magazine Article
  • TBMG-28838
Published 2018-05-01 by Tech Briefs Media Group in United States

Spinoff is NASA’s annual publication featuring successfully commercialized NASA technology. This commercialization has contributed to the development of products and services in the fields of health and medicine, consumer goods, transportation, public safety, computer technology, and environmental resources.

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Reusable Lock for Spanner Nuts

E-25 General Standards for Aerospace and Propulsion Systems
  • Aerospace Standard
  • ARP688B
  • Current
Published 2018-04-28 by SAE International in United States
This aerospace recommended practice is applicable to the design of a reusable locking device for cylindrical nuts which are generally tightened with a spanner wrench. Nuts of this type are commonly used to pre-load, and/or position, anti-friction bearings.
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Flexible, Gravity-Fed Heat Pipe

  • Magazine Article
  • TBMG-28544
Published 2018-03-01 by Tech Briefs Media Group in United States

The advent of cryocooler technology ushers in an era where a cryogenic environment is created and maintained locally. It is no longer necessary to transport cryogen from a factory where it is produced to the location where it is needed. One problem remains for cooling large cryogenic systems with cryocoolers that extract more than 50 W of power. Although high-capacity cryocoolers are available from several commercial sources, the thermal link for connecting the cryocooler to a large system is not yet available. For small systems requiring less heat extraction, flexible heat straps made of braided copper wires are available for the thermal link. For heat extraction of more than 50 W at −100 K, this type of heat strap cannot be made short enough and flexible enough.

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Sintered Carbide Tools

Metals Technical Executive Steering Committee
  • Ground Vehicle Standard
  • J439_201801
  • Current
Published 2018-01-09 by SAE International in United States
This recommended practice covers methods for measuring or evaluating five properties or characteristics of sintered carbide which contribute significantly to the performance of sintered carbide tools. These properties are: hardness, specific gravity, apparent porosity, structure, and grain size. They are covered under separate headings below.
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