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Noise and Vibration Optimization Using TMR Analysis for CI Engine Fueled by Blends of Simarouba Methyl Ester

  • Technical Paper
  • 2019-01-1894
To be published on 2019-09-16 by SAE International in United States
Today’s frenetic engine manufacturing and transportation sector and its related traces viz; noise and vibration of our modern societies has adverse effect on environment as well as all of us. Generally, vehicle extensively tested to withstand against mechanical shocks, noise, vibration etc. While, accordingly make the provision such as suspension, dampers, air bags etc. still the problem of noise/vibration day-by-day incrementally arise and become severe with the age of vehicles. Noise/vibration is a controllable pollutant that deserves the attention were all the scientific community work hard for controlling their harmful effects. Modern research affords us the opportunity to understand the subject better and to develop advance technologies. Widely immediate slogan and goal of all industries might be to reduce Noise/vibration on predominantly basis while, make the quietest and smoothest running Engines. Noise/vibration cause and adverse effect on C.I engine, engine component and ultimately vehicle, may reduce the life of the engine. To, reduce the dependency on diesel fuel (Due to rapid worldwide depletion) Biodiesel is one of the immediate, alternative and complimentary solution. In the…

Stapp Car Crash Journal Vol. 62, 2018

  • Book
  • B-STAPP2018
Published 2019-04-30 by The Stapp Association in United States
This title includes the technical papers developed for the 2018 Stapp Car Crash Conference, the premier forum for the presentation of research in impact biomechanics, human injury tolerance, and related fields, advancing the knowledge of land-vehicle crash injury protection. The conference provides an opportunity to participate in open discussion about the causes and mechanisms of injury, experimental methods and tools for use in impact biomechanics research, and the development of new concepts for reducing injuries and fatalities in automobile crashes. The topics covered this year include: • Effect of restraints on chest deflection • Thoracic response in dynamic front loading • Side impact assessments and comparisons • Front airbag deployment rates and implications • Reanalysis of experimental brain strain data • Modeling pedestrian impacts • Short communications o New data on the biomechanics of injury and human tolerance, new methods and tools to study the biomechanics of injury, new developments in occupant protection systems, and new concepts on the biomechanics of injury based on experimental and analytical studies.

Innovative Knee Airbag (KAB) Concept for Small Overlap and Oblique Frontal Impacts

Detroit Engineered Products (DEP) Inc.-Rahul Makwana
Ford Motor Co., Ltd.-Pardeep Jindal
Published 2019-04-02 by SAE International in United States
Considerable research has been conducted in terms of attempting to reduce lower leg injury risk in full frontal impacts, in some cases by the use of a knee airbag (KAB). However, there has been limited research into the performance of KAB systems during a crash test with increased oblique loading, such as the IIHS small overlap frontal test, an oblique moving deformable barrier test (OI) being researched by NHTSA, and a mobile progressive deformable barrier test (MPDB) that is expected to be implemented by Euro NCAP in the next few years. The objective of the current numerical study was concentrated on the evaluation of an innovative KAB concept design intended to reduce ATD right inboard lower leg/foot responses under small overlap and oblique loading conditions. A novel appendage KAB concept design was developed with the help of morphing and computational studies which were performed with different ATD sizes. In the study, one of the lower leg/foot responses was monitored and compared over a conventional KAB design. Cases investigated in the study showed that the novel…
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Performance of Event Data Recorders Found in Toyota Airbag Control Modules in High Severity Frontal Oblique Offset Crash Tests

Kineticorp, LLC.-William Bortles
University of Tulsa-Ryan Hostetler
Published 2019-04-02 by SAE International in United States
This paper presents an in-depth analysis of the performance of Event Data Recorders (EDRs) found in the Airbag Control Modules (ACMs), as tested in support of the National Highway Traffic Safety Administration’s Frontal Oblique Offset Program. Previous studies have examined EDR performance in high severity full-frontal barrier crash tests and moving deformable barrier side impact tests. This paper presents data from a high severity oblique frontal impact test in which the vehicle was struck by a moving deformable barrier. This paper examines the results of EDR data downloaded from two 2015 model year Toyota Highlanders, and the results of EDR reported change in velocity (delta-v), to vehicle mounted accelerometers and reference instrumentation. This paper will analyze EDR performance in reporting: Seatbelt buckle status,Occupant Size Classification, Front Passenger,Airbag and seatbelt pretensioner deployment time(s),Longitudinal delta-v, andLateral acceleration/crash pulse.
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Study of Optimization Strategy for Vehicle Restraint System Design

ESTECO North America-Zhendan Xue
Ford Motor Co., Ltd.-Guosong Li, Ching-Hung Chuang, Kevin Pline
Published 2019-04-02 by SAE International in United States
Vehicle restraint systems are optimized to maximize occupant safety and achieve high safety ratings. The optimization formulation often involves the inclusion or exclusion of restraint features as discrete design variables, as well as continuous restraint design variables such as airbag firing time, airbag vent size, inflator power level, etc. The optimization problem is constrained by injury criteria such as Head Injury Criterion (HIC), chest deflection, chest acceleration, neck tension/compression, etc., which ensures the vehicle meets or exceeds all Federal Motor Vehicle Safety Standard (FMVSS) requirements. Typically, Genetic Algorithms (GA) optimizations are applied because of their capability to handle discrete and continuous variables simultaneously and their ability to jump out of regions with multiple local optima, particularly for this type of highly non-linear problems. However, the computational time for the GA based optimization is often lengthy because of the relatively slow convergence comparing to derivative based algorithms. This study compares GA and multi-strategy optimization algorithms on driver’s side full frontal 90-degree rigid barrier impact MADYMO simulations at different impact speeds with belted and unbelted occupants. The…
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Annotation icon - Occupant Crash Simulation Analysis Made Easy

Hork Enterprises-Henk Helleman
Published 2019-04-02 by SAE International in United States
Over 30 years of occupant crash safety simulations have seen ever more sophisticated tools and models to keep pace with ever more demanding and expanding requirements. These sophisticated tools, however, require highly trained and experienced analysis specialists to operate. This keeps them out of reach of occasional users such as program managers, restraints buyers, and design engineers. Yet, the people involved in the early stages of vehicle development can have a great impact on vehicle safety performance and the costs of achieving the targets. By combining prebuilt models and a fully capable finite element solver with an easy to use web interface, we aim to make the simulation technology available to anybody with a web browser.The application is richly featured. Alike to sled testing, there is a choice of multiple vehicle geometries, from sub-compacts to large trucks. They come with crash pulses that are typical for their class that may be scaled up or down to make them more or less severe. If that does not suit the purpose, a custom crash pulse may…
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Probability of Frontal Airbag Deployment in Bumper-Bumper and Underride Collisions

National Biomechanics Institute-Felix Lee, Caitlin H. McCleery, Christina Ngo, Manon Limousis-Gayda, Rami Hashish
Published 2019-04-02 by SAE International in United States
Airbag deployment thresholds can be a useful metric of collision severity in accident reconstruction applications. The National Automotive Sampling System (NASS) has provided a publicly-available database of real-world motor vehicle collisions, including more than 10,000 event data recorder (EDR) reports retrieved from airbag control modules. These reports typically indicate the airbag deployment status and the corresponding Delta-V of each recorded event. A prior study analyzing crash data in the NASS database demonstrated the airbag deployment threshold varies between vehicle manufacturers and over time. However, the analysis was limited to Ford and GM vehicles due to insufficient data. This paper expands on the prior study of frontal airbag deployment thresholds by analyzing newer years of NASS EDR data (4,000 additional reports). We found that the Delta-V threshold for a 50% probability of deployment event is higher for Toyota than for GM and Ford vehicles. Moreover, SUVs and pickup trucks had higher deployment thresholds than sedans. An increase in Delta-V thresholds was observed for more recent vehicle model years. A higher Delta-V is required for frontal airbag…
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Recommended Practice for Identification of Standardized Truck and Tractor Electrical Circuits

Truck and Bus Electrical Systems Committee
  • Ground Vehicle Standard
  • J2191_201901
  • Current
Published 2019-01-08 by SAE International in United States
This SAE document defines a recommended practice for implementing circuit identification for electrical power and signal distribution systems of the Class 8 trucks and tractors. This document provides a description of a supplemental circuit identifier that shall be utilized in conjunction with the original equipment manufacturer’s primary circuit identification as used in wire harnesses but does not include electrical or electronic devices which have pigtails. The supplemental circuit identifier is cross-referenced to a specified subsystem of the power and signal distribution system identified in Section 5.
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Products of Tomorrow: January 2019

  • Magazine Article
  • TBMG-33594
Published 2019-01-01 by Tech Briefs Media Group in United States

This column presents technologies that have applications in commercial areas, possibly creating the products of tomorrow. To learn more about each technology, see the contact information provided for that innovation.


Front Airbag Deployment Rates in Real-World Car Accidents in Japan and Implications for Activation of Accident Emergency Calling System

National Traffic Safety and Environment Laboratory, Japan-Yasuhiro Matsui
Tokyo Metropolitan University, Japan-Shoko Oikawa
Published 2018-11-12 by The Stapp Association in United States
Accident emergency calling systems (AECSs) are signaled by the deployment of airbags, which causes them to automatically emit information providing the location of the accident site to a public service answering party (PSAP). In some real-world accidents, airbags have failed to deploy. This study clarifies the factors that influence the nondeployment of front airbags in vehicle-vehicle collisions, investigating nondeployment of the driver-side front airbags in sedans and light passenger cars (LPCs) from Japanese accident data. The component rates of deployment for front airbags tend to be higher than those of nondeployment at higher values of pseudo-ΔV in vehicle-vehicle frontal impacts. For both sedans and LPCs, the transition zones between nondeployment and deployment of the front airbag occur at pseudo-ΔV values of 30-50 km/h (ΔV ≈ 21-35 km/h). For mutual impact locations where sedans and LPCs impact opponent vehicles at pseudo-ΔV ≥ 40 km/h (ΔV ≈ 28 km/h) in frontal impacts, the component rate of front airbag nondeployment is higher than that of deployment in right-to-right impacts. The results indicate that factors influencing front airbag nondeployment…
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