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Brass, Naval, Bars and Rods 60.5Cu - 38.7Zn - 0.8Sn Half Hard (H02)

AMS D Nonferrous Alloys Committee
  • Aerospace Material Specification
  • AMS4611J
  • Current
Published 2019-07-26 by SAE International in United States

This specification covers a copper alloy (naval brass) in the form of bars and rods.

 
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Experimental Studies of the Effect of Ethanol Auxiliary Fuelled Turbulent Jet Ignition in an Optical Engine

SAE International Journal of Engines

Brunel University, UK-Khalifa Bureshaid, Ray Shimura, Hua Zhao
MAHLE Powertrain, LLC, USA-Mike Bunce
  • Journal Article
  • 03-12-04-0026
Published 2019-07-26 by SAE International in United States
Internal combustion (IC) engines are widely used in automotive, marine, agricultural and industrial machineries because of their superior performance, high efficiency, power density, durability and versatility in size and power outputs. In response to the demand for improved engine efficiency and lower CO2 emissions, advanced combustion process control techniques and more renewable fuels should be adopted for IC engines. Lean-burn combustion is one of the technologies with the potential to improve thermal efficiencies due to reduced heat loss and higher ratio of the specific heats. In order to operate the IC engines with very lean air/fuel mixtures, multiple turbulent jet pre-chamber ignition has been researched and developed to extend the lean-burn limit. Turbulent Jet Ignition (TJI) offers very fast burn rates compared to spark plug ignition by producing multiple ignition sites that consume the main charge rapidly. In this research, studies were carried out on the ignition and combustion characteristics of pre-chamber ignition produced by a Mahle TJI unit installed in a single-cylinder engine with optical access. In particular, this article focuses on the spatial…
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Throat Unit Collector Modeling of Gasoline Particulate Filter Performance

SAE International Journal of Engines

Texas A&M University, USA-Pengze Yang, Michael B. Pate
University of Wisconsin-Madison, USA-Andrea Strzelec
  • Journal Article
  • 03-12-04-0028
Published 2019-07-26 by SAE International in United States
The wide application of Gasoline Direct Injection (GDI) engines and the increasingly stringent Particulate Matter (PM) and Particulate Number (PN) regulations make Gasoline Particulate Filters (GPFs) with high filtration efficiency and low pressure drop highly desirable. However, due to the specifics of GDI operation and GDI PM, the design of these filters is even more challenging as compared to their diesel counterparts. Computational Fluid Dynamics (CFD) studies have been shown to be an effective way to investigate filter performance. In particular, our previous two-dimensional (2D) CFD study explicated the pore size and pore-size distribution effects on GPF filtration efficiency and pressure drop. The “throat unit collector” model developed in this study furthers this work in order to characterize the GPF wall microstructure more precisely. Throat unit collectors with different diameter ratios were created and simulated in ANSYS FLUENT to calculate the size-dependent particle filtration efficiency. The simulation results indicated a nonlinear change of single-collector efficiency, as the efficiency first decreased and then increased with a decreasing throat unit collector diameter ratio. The simulation results also…
 
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Steel Bars, 1.0Cr - 0.20Mo - 0.045Se (0.39 - 0.48C) (4142H Modified), Die-Drawn, 130 ksi (896 MPa) Yield Strength, Free Machining

AMS E Carbon and Low Alloy Steels Committee
  • Aerospace Material Specification
  • AMS6378H
  • Current
Published 2019-07-26 by SAE International in United States

This specification covers a free-machining, low-alloy steel in the form of round bars 3.50 inches (88.9 mm) and under in nominal diameter produced by a die-drawing process.

 
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A New Approach for Development of a High-Performance Intake Manifold for a Single-Cylinder Engine Used in Formula SAE Application

SAE International Journal of Engines

VIT University, India-Venugopal Thangavel, Anubhav Routray
  • Journal Article
  • 03-12-04-0027
Published 2019-07-26 by SAE International in United States
The Formula SAE (FSAE) is an international engineering competition where a Formula style race car is designed and built by students from worldwide universities. According to FSAE regulation, an air restrictor with circular cross section of 20 mm for gasoline-fuelled and 19 mm for E-85-fuelled vehicles is to be incorporated between the throttle valve and engine inlet. The sole purpose of this regulation is to limit the airflow to the engine used. The only sequence allowed is throttle valve, restrictor and engine inlet. A new approach of combining ram theory and acoustic theory methods are investigated to increase the performance of the engine by designing an optimized intake runner for a particular engine speed range and an optimized plenum volume in this range. Engine performance characteristics such as brake power, brake torque and volumetric efficiency are taken into considerations. Ricardo Wave simulation software is used to evaluate the impacts of plenum volume and runner length on engine performance based on the afore-mentioned performance characteristics. Various intake manifold designs are iterated in accordance with the surface…
 
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Automotive Engineering: July/August 2019

  • Magazine Issue
  • 19AUTP08
Published 2019-07-25 by SAE International in United States
Extending the ICE age Future vehicle propulsion is not a single-solution challenge. Top engineers take Automotive Engineering into the next combustion-engine frontier.FCA's Micky Bly amping up electrification New powertrain boss Micky Bly and his team are building an advanced propulsion-strategy roadmap that includes at least one more ICE development cycle.Ford's Dave Filipe has some powerful choices to make These are interesting days for those managing global propulsion portfolios, but Ford's powertrain lead says a smart team has him relishing the challenges.GM's Ken Morris lives the pace of the powertrain revolution The purview of GM's VP of global product integrity includes the rapidly-shifting landscape of powertrain engineering.Hyundai's John Juriga optimizing ICE and fuels Hyundai is building on its lean-combustion knowledge in a DoE-sponsored collaborative program with MTU and Phillips 66.Other expert voices The 2019 'ICE's Still Not Dead' panel discussion was very much alive.Mahle MJI technology sparking ignition advances Engine-development supplier Mahle believes pre-chamber combustion technology for production gasoline engines has a promising future.For EVs to 'win,' battery tech must outpace oil-industry advances Analysts say moderate…
 
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Snowmobile Passenger Handgrips

Snowmobile Technical Committee
  • Ground Vehicle Standard
  • J1062_201907
  • Current
Published 2019-07-24 by SAE International in United States

This SAE Recommended Practice is intended to give information to engineers and designers in order that access to a passenger handgrip, when used, is easily obtained, and that such handgrips offer maximum safety for a person at least as large as a 95th percentile adult male during snowmobile operation.

 
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One-Way Clutches - Nomenclature and Terminology

Automatic Transmission and Transaxle Committee
  • Ground Vehicle Standard
  • J1087_201907
  • Current
Published 2019-07-24 by SAE International in United States

The definitions and illustrations in this SAE Recommended Practice are intended to establish common nomenclature and terminology for automotive transmission one-way clutches.

 
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Steel, Corrosion-Resistant, Bars, and Forgings, 10Cr - 5.5Ni - 14Co - 2Mo - 1W (0.19-0.23C), Vacuum Induction Melted, Vacuum Arc Remelted, Normalized, Annealed

AMS F Corrosion Heat Resistant Alloys Committee
  • Aerospace Material Specification
  • AMS5922C
  • Current
Published 2019-07-24 by SAE International in United States

This specification covers a corrosion-resistant, premium aircraft-quality alloy steel in the form of bars, forgings, and stock for forging.

 
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Calculation of Electron Vacancy Number in Superalloys

AMS F Corrosion Heat Resistant Alloys Committee
  • Aerospace Standard
  • AS5491D
  • Current
Published 2019-07-24 by SAE International in United States

This SAE Aerospace Standard (AS) establishes a uniform procedure for calculation of electron vacancy numbers in superalloys. It is intended for use by suppliers of raw materials and parts, typically castings, for which control of electron vacancy number is required by the raw material specification.