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Ignition Switch Material Definition to Avoid Hard to Start Issue

Ford Motor Company-Júlio Magalhães, Douglas Demori, Rosiane Viegas, Bruno Freitas
Huf Hülsbeck & Fürst-Michel Turbiani
  • Technical Paper
  • 2019-36-0138
Published 2020-01-13 by SAE International in United States
Nowadays, develop and launch a new product in the market is hard to every company. When we talk about a launch new vehicle to the customers, this task could be considered more difficult than other products whether imagine how fast the technology should be integrated to vehicle. There are main pillars to be considered in this scenario: low cost, design, innovation, competitiveness and safety. Whereas Brazilian economic scenario, all OEM has to be aware to opportunity to make the product profitable and keep acceptable quality. This combination between low cost and quality could be broken or not distributed equally between the pillars. Based on that, in some cases could have a quality broken that will affect directly the customer. This paper will focus on project to define of the new ignition switch, when the main challenge to achieve the cost reduction target was defined to change a material to electrical terminals. Beyond the material definition, we will discuss about the validation in component level and VOW, quality indicators (internal and external), prevent reoccurrences actions and…
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Improvement of Hybrid Scheme for WAVE-MTAB Model and Analytical Study of Diesel Spray Using Theory on the Spray Similarity

Department of Mechanical Engineering Combustion Engineering-Tsukasa Hori
Spray and Combustion Science Laboratory, Doshisha University-Motoki Hosogi, Eriko Matsumura, Jiro Senda
  • Technical Paper
  • 2019-01-2324
Published 2019-12-19 by SAE International in United States
In order to further improve the thermal efficiency of diesel engines, this report focuses on the influence of injection condition on similarity of similar spray. To accurately reproduce the diesel spray in our laboratory, the WAVE-MTAB model was developed, and improvements were made to switch between two breakup models. As a result, switching of the breakup model can be done according to the physical phenomenon, and it is considered that similar spray can be reproduced generally well when using theory on the spray similarity.
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Valve Position Sensor Protects Switch Boxes from Salt Environment

  • Magazine Article
  • TBMG-35618
Published 2019-12-01 by Tech Briefs Media Group in United States

Salt is everywhere at Frisia Zout in the Dutch city of Harlingen because salt is precisely what Frisia produces. Since the company's plant is located only a few meters away from the sea, salt is even in the air. This poses a significant problem for the switch boxes that control the company's outdoor valves because the salty air causes exposed metal parts to corrode.

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Smart 24 V Battery Switch for a Reliable Redundant Power Supply in Commercial, Construction, and Agriculture Vehicles (CAV)

Infineon Technologies AG-Vincent Usseglio, Andre Mourrier
Published 2019-10-11 by SAE International in United States
For highly automated driving, commercial vehicles require an Electric/Electronic (E/E) architecture, which - in addition to sensor fusion - ensures safety-critical processes such as steering and braking at all times. Among other things, a redundant 24 V supply with corresponding disconnection is required. The battery switch is a key component. Commercial, construction, and agricultural vehicles (CAV) need to operate at the highest possible availability and the lowest possible cost of ownership. This is why automated and autonomous driving has the potential to revolutionize the CAV sector. Driverless machines can be operated around the clock and almost non-stop. Platooning allows automated, interconnected trucks to drive in a convoy and very close to each other. Platooning saves fuel. The North American Council for Freight Efficiency has calculated the following:In a scenario with two virtually connected trucks, the fuel consumption of the front vehicle is reduced by 4.5%, and by 10% in the rear vehicle, due to reduced aerodynamic drag on all of the vehicles.In a scenario with three connected trucks, platooning even leads to an average savings…
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Simulation Analysis of Single-Phase Matrix Converter for Cycloconverter Operation Using SPWM with Under and Over Modulation Technique

SRM Institute Of Science And Technology-Kalaiarasi Nallathambi, Anitha Daniel, Uthra Rangarajan
Published 2019-10-11 by SAE International in United States
This paper discusses the implementation of ac-ac converter using a matrix converter. A MATLAB Simulink model of single-phase matrix converter has been developed for matrix converter with a step up and step down of input frequency. Selection of power switches differentiates the conventional cycloconverter from that of matrix converter based cycloconverter. Conventional cycloconverters requires thyristors whereas matrix converter based cycloconverter requires IGBT which is formed as a bidirectional switch module. The performance of matrix converter based cycloconverter using Sinusoidal Pulse Width Modulation Technique (SPWM) has been analyzed for resistive and inductive loads at varying frequency. This paper presents the output results for various frequencies such as 12.5 Hz, 25 Hz (step-down operation) and 100 Hz (step-up operation).
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Modulation Strategy for Minimization of Leakage Current in Grid-Connected PV Panels

SRM Institute Of Science And Technology-Anitha Daniel, Uthra Rangarajan, Kalaiarasi Nallathambi
Published 2019-10-11 by SAE International in United States
This paper presents a switching strategy for the cascaded multilevel H bridge inverter of five levels to reduce the leakage current in the grid-connected transformerless PV system. Minimization of the leakage current in solar panels is vital in transformerless grid-connected PV panels. But due to the absence of transformers which provide galvanic isolation, CMV techniques are applied to reduce leakage currents from PV panel to ground. This current causes hazards to humans and large currents above 300mA may lead to fire hazards. The proposed switching strategy reduces the continuous transients at switches, hence avoiding high frequency switching. This switching technique requires only a single modified carrier wave for all 2m+1 levels of operation. The sinusoidal carrier waveform is modified as a humped sinusoidal waveform with to reduce switching losses. In this paper, the switching strategy with the modified sinusoidal carrier has been incorporated to PV fed five level multilevel inverters connected to the grid and its effectiveness has been validated.
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Tests for Snowmobile Switching Devices and Components

Snowmobile Technical Committee
  • Ground Vehicle Standard
  • J68_201910
  • Current
Published 2019-10-07 by SAE International in United States
This SAE Recommended Practice covers standardized basic tests, test methods, and requirements applicable to electromechanical switching devices which may be used on snowmobiles as defined in SAE J33.
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How to Use Rotary Encoders to Quickly Convert Mechanical Rotation into Digital Signals

  • Magazine Article
  • TBMG-35291
Published 2019-10-01 by Tech Briefs Media Group in United States

In the digital age, the measurement of rotation of a mechanical shaft on a motor or a rotating instrument knob needs to be done quickly and efficiently. Analog methods such as potentiometers and rotating switches are being replaced by rotary encoders that directly digitize rotary movement, but designers need to be able to appreciate the differences among various encoder types and accurately interpret their digital outputs.

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Maintenance of Design Voltage - Snowmobile Electrical Systems

Snowmobile Technical Committee
  • Ground Vehicle Standard
  • J277_201909
  • Current
Published 2019-09-25 by SAE International in United States
This SAE Recommended Practice provides test methods and requirements for maintenance of design voltage in snowmobile electrical systems. It pertains to both battery-equipped and battery-less systems.
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Fuze Well Mechanical Interface

AS-1B Aircraft Store Integration Committee
  • Aerospace Standard
  • AS5680B
  • Current
Published 2019-09-03 by SAE International in United States
This interface standard applies to fuzes used in airborne weapons that use a 3-in fuze well. It defines: Physical envelope of the fuze well at the interface with the fuze. Load bearing surfaces of the fuze well. Physical envelope of the fuze and its connector. Mechanical features (e.g., clocking feature). Connector type, size, location and orientation. Retaining ring and its mechanical features (e.g., thread, tool interface). Physical envelope of the retaining ring at the interface with the fuze. Physical space available for installation tools. Torque that the installation tool shall be capable of providing. This standard does not address: Materials used or their properties. Protective finish. Physical environment of the weapon. Explosive interface or features (e.g., insensitive munitions (IM) mitigation). Charging tube. Torque on the retaining ring or loads on the load bearing surfaces. Each fuze and weapon combination should be evaluated to ensure that the weapon system will satisfy all safety, reliability, and performance requirements throughout its lifecycle.
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