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Identifying the driving processes of Diesel spray injection through mixture fraction and velocity field measurements at ECN Spray A

Eindhoven University of Technology-Bart Somers
IFP Energies Nouvelles-Louis-Marie Malbec, Gilles Bruneaux
  • Technical Paper
  • 2020-01-0831
To be published on 2020-04-14 by SAE International in United States
Diesel spray mixture formation is investigated at target conditions using multiple diagnostics and laboratories. High speed Particle Image Velocimetry (PIV) is used to measure the velocity field inside and outside the jet simultaneously with a new frame straddling synchronisation scheme. The PIV measurements are carried out in the Engine Combustion Network Spray A target conditions, enabling direct comparisons with mixture fraction measurements previously performed in the same conditions, and forming a unique database at diesel conditions. A 1D spray model, based upon mass and momentum exchange between axial control volumes and near-Gaussian velocity and mixture fraction profiles is evaluated against the data. The 1D spray model quantitatively predicts the main spray characteristics (average mixture fraction and velocity fields) within the measurement uncertainty for a wide range of parametric variations, verifying that a Diesel spray becomes momentum controlled and has a Gaussian profile. A required input to the model is the jet angle, which is obtained experimentally. Although an expected result for a gas jet, this is the first time that combined datasets of velocity and…
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Permanently or Semi-Permanently Installed Diagnostic Communication Devices, Security Guidelines

Vehicle E E System Diagnostic Standards Committee
  • Ground Vehicle Standard
  • J3005-2_202003
  • Current
Published 2020-03-04 by SAE International in United States

The scope of the document is to define the cyber-security best practices to reduce interference with normal vehicle operation, or to minimize risk as to unauthorized access of the vehicle's control, diagnostic, or data storage system; access by equipment (i.e., permanently or semi-permanently installed diagnostic communication device, also known as dongle, etc.) which is either permanently or semi-permanently connected to the vehicle's OBD diagnostic connector, either SAE J1939-13, SAE J1962, or other future protocol; or hardwired directly to the in-vehicle network. This document only specifies requirements and guidance for those diagnostic communication devices and not for the vehicle. Refer to SAE J3138 for requirements for the vehicle side.

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EDITORIAL: Engineering lapses test brand loyalty

Automotive Engineering: November/December 2019

Editor-in-Chief-Lindsay Brooke
  • Magazine Article
  • 19AUTP11_05
Published 2019-11-01 by SAE International in United States

“Today a bunch of idiot lights appeared in the minivan during my drive to work,” reported my spouse, Suzie, after she arrived home one evening last month. Sure enough, the cluster on our 2011 Honda Odyssey lit up like a Christmas tree when I turned on the ignition to investigate. The Check Engine light and two others were illuminated.

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Recommended Practice for Optimizing Automobile Damageability and Repairability

Motor Vehicle Council
  • Ground Vehicle Standard
  • J1555_201910
  • Current
Published 2019-10-24 by SAE International in United States
This SAE Recommended Practice applies to all portions of the vehicle, but design efforts should focus on components and systems with the highest contribution to the overall average repair cost (see 3.7). The costs to be minimized include not only insurance premiums, but also out-of-pocket costs incurred by the owner. Damageability, repairability, serviceability and diagnostics are inter-related. Some repairability, serviceability and diagnostics operations may be required for collision or comprehensive loss-related causes only. Some operations may be for non-collision-related causes only (warranty, scheduled maintenance, non-scheduled maintenance, etc.). Some may be required for both causes. The scope of this document deals with only those operations that involve collision and comprehensive insurance loss repairs.
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Data connectivity in HARSH ENVIRONMENTS

SAE Truck & Off-Highway Engineering: August 2019

Christian Manko
  • Magazine Article
  • 19TOFHP08_03
Published 2019-08-01 by SAE International in United States

Ensuring high-speed data transmission requires OEM designers to think more about components, placement and the impact of environmental conditions early in design.

Technology advances are increasingly bringing a new level of connectivity to industrial and commercial vehicles. Customers are demanding functionality that automates or enhances operational tasks to increase driver productivity and safety and, in many cases, also brings down total cost of ownership.

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Diagnose Lithium Batteries

  • Magazine Article
  • TBMG-34587
Published 2019-06-01 by Tech Briefs Media Group in United States

Batteries with metallic lithium anodes offer enhanced efficiency compared to conventional lithium-ion batteries because of their higher capacity. However, safety concerns and a short lifespan stand in the way. To better analyze the causes of malfunctions and premature failure of such batteries, researchers have developed a technique that visualizes the distribution of active lithium on the anode and differentiates between dendrites and “dead” lithium. The technique makes use of a fluorescent dye.

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TP2.0 Vehicle Diagnostic Protocol

Vehicle E E System Diagnostic Standards Committee
  • Ground Vehicle Standard
  • J2819_201905
  • Current
Published 2019-05-20 by SAE International in United States
This Technical Information Report defines the diagnostic communication protocol TP2.0. This document should be used in conjunction with SAE J2534-2 in order to fully implement the communication protocol in an SAE J2534 interface. Some Volkswagen of America and Audi of America vehicles are equipped with ECU(s), in which a TP2.0 proprietary diagnostic communication protocol is implemented. The purpose of this document is to specify the requirements necessary to implement the communication protocol in an SAE J2534 interface.
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Keyword Protocol 1281

Vehicle E E System Diagnostic Standards Committee
  • Ground Vehicle Standard
  • J2818_201905
  • Current
Published 2019-05-20 by SAE International in United States
This Technical Information Report defines the diagnostic communication protocol Keyword Protocol 1281 (KWP1281). This document should be used in conjunction with SAE J2534-2 in order to fully implement the communication protocol in an SAE J2534 interface. Some Volkswagen of America and Audi of America vehicles are equipped with ECUs, in which a KWP1281 proprietary diagnostic communication protocol is implemented. The purpose of this document is to specify the KWP1281 protocol in enough detail to support the requirements necessary to implement the communication protocol in an SAE J2534 interface device.
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The Auto-Generation of Calibration Guides from MATLAB® Simulink®

Delphi Corporation-William Allen
Delphi Technologies Inc.-Bharath Sundar
Published 2019-03-19 by SAE International in United States
With the inception of model-based design and automatic code generation, many organizations are developing controls and diagnostics algorithms in model-based development tools to meet customer and regulatory requirements. Advances in model-based design have made it easier to generate C code from models and help software engineers streamline their workflow. Typically, after the software has been developed, the models are handed over to a calibration team responsible for calibrating the features to meet specified customer and regulatory requirements. However, once the models are handed over to the calibration team, the calibration engineers are unaware of how to calibrate the features because documentation is not available. Typically, model documentation trails behind the software process because it is created manually, most of this time is spent on formatting. As a result, lack of model documentation or up-to date documentation causes a lot of pain for OEM’s and Tier 1 suppliers. This paper will explore the auto-generation of documentation from Simulink® models. The format and contents of the auto-generated document will be reviewed in this paper. This paper will…
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Diagnostic Communication with Road-Vehicles and Non-Road Mobile Machinery

Softing Automotive Electronics GmbH-Peter Subke
  • Book
  • R-474
Published 2019-03-01 by SAE International in United States
Diagnostic Communication with Road-Vehicles and Non-Road Mobile Machinery examines the communication between a diagnostic tester and E/E systems of road-vehicles and non-road mobile machinery such as agricultural machines and construction equipment. The title also contains the description of E/E systems (control units and in-vehicle networks), the communication protocols (e.g. OBD, J1939 and UDS on CAN / IP), and a glimpse into the near future covering remote, cloud-based diagnostics and cybersecurity threats.