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Rockets re-engineered-a step further into the cosmos

MOBILITY ENGINEERING: December 2017

  • Magazine Article
  • 17MEIP12_01
Published 2017-12-01 by SAE International in United States

The 20th-Century nuclear arms race led to pioneering efforts in space technology, primarily driven by nations' desire to surpass one another for supremacy in spaceflight capability. Despite the largely deplorable motivations that drove the so-called “space race,” it resulted in a massive surge in aerospace engineering efforts that eventually led to the development of artificial satellites orbiting the earth, space probes that have explored the moon and other planets and the most challenging accomplishment: human spaceflight.

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ICE BREAKER!

MOBILITY ENGINEERING: December 2017

Ian Adcock
  • Magazine Article
  • 17MEIP12_03
Published 2017-12-01 by SAE International in United States

Mazda's Skyactiv-X beats the big companies to market with a promising new engine that marries Otto and Diesel attributes.

One of the most significant developments in internal combustion engine (ICE) technology for decades, Mazda's innovative Skyactiv-X Spark Controlled Compression Ignition (SpCCI) combustion system is slated for production in 2018. It has the potential to extend the practical life of gasoline engines, which are increasingly under threat from both global emissions legislation and the accelerating development of electric vehicles (EVs).

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Aeroacoustic simulation delivers breakthroughs in aircraft noise reduction

MOBILITY ENGINEERING: December 2017

  • Magazine Article
  • 17MEIP12_05
Published 2017-12-01 by SAE International in United States

Aircraft manufacturers face increasingly stringent standards for reducing community noise. Conventional aircraft development methods based on engineering experience, past designs and flight testing will not suffice to meet future noise reduction targets. Computational Fluid Dynamics (CFD) software based on so-called Reynolds-averaged Navier-Stokes (RANS) methods has revolutionized aerodynamics engineering, but is insufficient for high-fidelity aeroacoustic simulation. However, the Lattice-Boltzmann-based technology of Exa Corp.'s PowerFLOW software provides aeroacoustic simulation accuracy comparable to wind tunnels and flight testing.

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Powertrain Design for Reliability

MOBILITY ENGINEERING: December 2017

  • Magazine Article
  • 17MEIP12_02
Published 2017-12-01 by SAE International in United States

Component and System reliability have long been the Achilles heel in engineering-and for that matter any domain. With increasing importance for customer satisfaction and safety, high reliability and product quality have become basic requirements for a successful and returns-yielding product.

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Advances for off-highway ENGINE DESIGN

MOBILITY ENGINEERING: December 2017

Bruce Morey
  • Magazine Article
  • 17MEIP12_04
Published 2017-12-01 by SAE International in United States

As manufacturers continue to drive out cost and meet a worldwide patchwork of regulatory frameworks, the tools for developing those engines are advancing. From showcase prototypes to advanced analytical techniques, suppliers are helping the cause.

“It is an exciting time for commercial engine designers,” said Michael Franke, director, light-duty diesel and commercial engines for FEV. The U.S. Tier 4 Final emissions regulation forced developers to deliver compliance in a shorter-than-normal design cycle. Now that the industry has had an opportunity to optimize Tier 4 Final products, the focus has shifted to longer-term objectives in meeting end-user expectations and responding to competition, according to Franke.

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Autonomy testing: SIMULATION TO THE RESCUE

MOBILITY ENGINEERING: December 2017

Kami Buchholz
  • Magazine Article
  • 17MEIP12_06
Published 2017-12-01 by SAE International in United States

Autonomous technology development injects new rigors on vehicle-development testing.

Engineers like a good challenge, and the development path for autonomous technologies is putting logical and creative thinkers to the ultimate test. “Use case and endurance testing-although highly relevant-are not enough to get to the confidence level that's needed before going into production with a highly-complex automated driving system. When you're trying to hit a metric that's 500 million to a billion miles of accident-free driving, you just can't drive that many miles, even in a decade. Challenges haven't stopped engineering progress in the past, and it isn't stopping progress now,” David Agnew, Director Advanced Engineering, Autonomous Vehicle Research for Mobis North America, asserted in a recent interview with Mobility Engineering.

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An approach for FEATURE prediction of MOTORCYCLE ENGINE NOISE under combustion load

MOBILITY ENGINEERING: September 2017

  • Magazine Article
  • 17MEIP09_03
Published 2017-09-01 by SAE International in United States

This paper presents an approach to predict engine noise under combustion forces. The methodology is divided into three stages: 1. Multibody dynamic (MBD) simulation to determine excitation forces 2. Vibration analysis of the engine under combustion load 3. Acoustic analysis of the engine to predict Sound Pressure Levels (SPL).

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Opposed-piston engines: the powerplant of the future

MOBILITY ENGINEERING: September 2017

  • Magazine Article
  • 17MEIP09_01
Published 2017-09-01 by SAE International in United States

The invention of the IC engine has not only facilitated but revolutionized civilization. Since its inception, it has undergone multitude of improvements in design and size. Although it has generated wealth and improved the standard of living, it also brought the problem of air pollution. Globally, air pollution is demonstrating a dominant and costly effect on human health and the climate, and automobiles are contributing significantly to global warming.

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More intelligence equals more efficiency, enhanced functionality

MOBILITY ENGINEERING: September 2017

Terry Costlow
  • Magazine Article
  • 17MEIP09_05
Published 2017-09-01 by SAE International in United States

Advanced systems require renewed focus on architectures, processors, sensors and networks.

Intelligent controls are continuing to reshape commercial vehicles, giving operators more functions and more space while also improving safety. Increasingly more powerful controls are being integrated to improve efficiency and lighten operator workloads.

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India's dream of an all-EV fleet by 2030: MYTH, MIRACLE, OR REALITY?

MOBILITY ENGINEERING: September 2017

  • Magazine Article
  • 17MEIP09_02
Published 2017-09-01 by SAE International in United States

India currently is the fourth-largest passenger-vehicle market in the world, with 3.04 million vehicles sold in 2016-2017 and a car parc of 25.9 million. Annual sales are projected to grow to 5 million by 2020.

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