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Simultaneous NOX and CO2 Reduction for Meeting Future CARB Standards Using a Heavy-Duty Diesel CDA-NVH Strategy

SAE International Journal of Engines

Eaton, USA-James E McCarthy, Matthew Pieczko
Southwest Research Institute, USA-Gary Neely, Chris Sharp
  • Journal Article
  • 03-13-02-0014
Published 2019-12-10 by SAE International in United States
Commercial vehicles require continual improvements in order to meet fuel consumption standards, improve diesel aftertreatment (AT) system performance, and optimize vehicle fuel economy. Simultaneous reductions in both CO2 and NOX emissions will be required to meet the upcoming regulatory targets for both EPA Phase 2 Greenhouse Gas Standards and new Low NOX Standards being proposed by the California Air Resources Board (CARB). In addition, CARB recently proposed a new certification cycle that will require high NOX conversion while vehicles are operating at lower loads than current regulatory cycles require. Cylinder deactivation (CDA) offers a powerful technology lever for meeting these two regulatory targets on commercial diesel engines. There have been numerous works in the past year showing the benefits of diesel CDA for elevating exhaust temperatures during low-load operation where it is normally too cold for AT to function at peak efficiency. At the same time, CO2 and fuel consumption are reduced through a combination of lower pumping and friction losses and improved thermal efficiency in the cylinders that are still firing. However, CDA has…
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SAE Truck & Off-Highway Engineering: December 2019

  • Magazine Issue
  • 19TOFHP12
Published 2019-12-05 by SAE International in United States
Heavy-duty engine design What are the most significant factors influencing the way engine developers approach near-term design and development cycles? Two experts provide their insights from recent programs.Reducing winter range loss for electric trucks Researchers at the Austrian Institute of Technology have developed an air exchange system that's capable of reducing heat load by 37% in real-world tests.Narrower focus, bigger payoff Design teams are targeting focused markets for their commercial electric-vehicle programs to combat challenges like range and infrastructure.Removing complexity for autonomous trucks Narrowing the operating domains for driverless commercial vehicles reduces the requirements of autonomous technology and speeds time to market.Plastics innovations 2019 The 49th annual SPE Automotive Awards highlight the ongoing benefits of lightweight polymers and composites.Editorial Hop on the hydrogen highwayLeak testing of commercial-vehicle AC systems critical as move to HFO refrigerants loomsAkasol packs industry-leading energy density into new battery designMahle and partners develop super-efficient natural-gas engine for stationary powerHow battery technology will drive truck electrificationPlatinum nanoparticles for fuel-cell catalysts may cut costCaterpillar launches next-gen mini hydraulic excavator, skid steer and compact…
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Hydraulic Directional Control Valves, 3000 psi Maximum

CTTC C1, Hydraulic Systems
  • Ground Vehicle Standard
  • J748_201912
  • Current
Published 2019-12-04 by SAE International in United States
This SAE Recommended Practice has been set up by Subcommittee 4 of the Off-Road Machinery Technical Committee and is primarily for directional control valves on construction and industrial machinery equipment as referenced in SAE J1116. The purpose is to establish port area to flow relationship and match valve spool eye ends in relation to rated capacity. Port connections are optional for either the 4-bolt split flange connection or the internal straight thread "O" ring connection.
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GMAW Process Parameter Optimization to Reduce Porosity Defect in a Longitudinal Seam Welding of Pressure Vessels

SAE International Journal of Materials and Manufacturing

Amrita Vishwa Vidyapeetham, India-A. Kuppusamy, K. Rameshkumar, A. Sumesh
ELGI Equipment Limited, India-S. Premkumar
  • Journal Article
  • 05-13-01-0005
Published 2019-12-02 by SAE International in United States
Pressure vessels are critical equipment used in industries for storing liquids or gases at a pressure significantly different from ambient conditions. Porosity is one of the major weld defects in pressure vessels that leads to failure during inspection and as well as during its service. Gas Metal Arc Welding (GMAW) process is widely used in industries to fabricate pressure vessels using carbon steel “IS 2062 E250BR” material for storing compressed air. The main objective of this article is to reduce the porosity defect in the longitudinal seam (LS) welding of the pressure vessels. Detailed analysis is carried out to identify the parameters which are influencing the porosity defect. Central Composite Design (CCD) and Response Surface Methodology (RSM) approaches are used to find the optimum value of the weld parameters which produce weld without porosity or any major defects in the pressure vessel. An experimental setup has been established and welding experiments have been conducted under a controlled environment. Experiments were conducted without any external disturbances ensuring clean weld surface and filler wire without any moisture,…
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Nickel Alloy, Corrosion and Heat-Resistant, Bars and Forgings, 57Ni - 20Cr - 10Co - 8.5Mo - 2.1Ti - 1.5Al - 0.005B, Vacuum Induction and Consumable Electrode Melted, Solution Heat Treated, Precipitation Heat Treatable

AMS F Corrosion Heat Resistant Alloys Committee
  • Aerospace Material Specification
  • AMS5915A
  • Current
Published 2019-12-02 by SAE International in United States

This specification covers a corrosion and heat-resistant nickel alloy in the form of bars, forgings, and stock for forging.

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Platinum nanoparticles for fuel-cell catalysts may cut cost

SAE Truck & Off-Highway Engineering: December 2019

Stuart Birch
  • Magazine Article
  • 19TOFHP12_11
Published 2019-12-01 by SAE International in United States

Fuel-cell technology is a big subject with some very small but vital aspects, one of which is the size of platinum atoms. Reduce these and the cost of platinum-one of the major drawbacks of current fuel-cell systems-would also fall. So, establishing and creating the optimum size for platinum fuel-cell catalysis for cars and heavy-duty trucks is one of the ongoing research areas for future alternative energy solutions.

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Tips for Reducing Error When Using Eddy Current Measuring Techniques

Aerospace & Defense Technology: December 2019

  • Magazine Article
  • 19AERP12_02
Published 2019-12-01 by SAE International in United States

Inductive eddy current technology is an extremely versatile non-contact method for measuring an object's position, distance, or vibration. Unaffected by environmental contaminants or target finish characteristics, these sensors can operate in a vacuum or in fluids, so they work well for dirty applications, like those with oil or dust present. To get the most out of eddy current sensors, follow these tips for reducing errors that can affect a measurement's accuracy.

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Reducing winter range loss for electric trucks

SAE Truck & Off-Highway Engineering: December 2019

Paul Weissler
  • Magazine Article
  • 19TOFHP12_02
Published 2019-12-01 by SAE International in United States

Researchers at the Austrian Institute of Technology have developed an air exchange system that's capable of reducing heat load by 37% in real-world tests.

Battery-electric vehicle (BEV) range loss from winter use of PTC (positive temperature coefficient) heating has become a source of major concern as the industry works to make EVs a mainstream choice. Addressing this particular problem area with an economically viable solution was deemed a worthwhile effort by the Austrian Institute of Technology (AIT), which is jointly owned by the Austrian government and the Federation of Austrian Industries. A fleet test of electric delivery trucks is underway on European roads.

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How battery technology will drive truck electrification

SAE Truck & Off-Highway Engineering: December 2019

Alexander Schey
  • Magazine Article
  • 19TOFHP12_10
Published 2019-12-01 by SAE International in United States

The past three years have seen a major shift in the perception around electrified commercial vehicles, including trucks, driven by a variety of factors that have come together at this particular time. These factors include a growing awareness and acceptance of the impact of CO2 emissions on climate change and the dangers of diesel emissions-most notably highlighted by the Volkswagen emissions scandal-alongside a growing maturity and improved cost profile on electric vehicle (EV) technology. As a result, fleet owners and OEMs now consider e-trucks much more seriously.

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Heavy-duty engine design

SAE Truck & Off-Highway Engineering: December 2019

Jennifer Shuttleworth, Ryan Gehm
  • Magazine Article
  • 19TOFHP12_01
Published 2019-12-01 by SAE International in United States

What are the most significant factors influencing the way engine developers approach near-term design and development cycles? Two experts provide their insights from recent programs.

Engine developers face numerous challenges in their work. When building the new clean-sheet design C3.6 engine, Caterpillar Industrial Power Systems considered several factors including customer feedback and lower owning and operating costs. The result of this development process is a compact 134-hp (100-kW) engine that provides a 5% increase in power density and 12% increase in torque compared to its predecessor engine, the C3.4B.

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