Refine Your Search

Topic

Author

Affiliation

Search Results

Technical Paper

Electrician Demand for Battery Electric Vehicle Charger Installation

2021-11-03
2021-01-5102
Demand for electricians was estimated based on projected increases in battery electric vehicle (BEV) sales. Total BEV sales were projected from current producer plans. Each scenario for charger type and charging location requires different combinations of electrical installation requirements. The need for types of charging will vary by location and individual preferences. Interviews with practicing electricians and field surveys were performed to assess current capabilities and the need for improvements. Very few current vehicle owners are prepared to make a smooth transition to even level 1 charging. It was determined that the demand for licensed electricians will increase by 25% over 20 years solely for the purpose of charger installation. However, this profession has been dropping over time and is under demand for growth from other areas such as green power.
Journal Article

A Neural Network-Based Regression Study for a Hybrid Battery Thermal Management System under Fast Charging

2021-11-03
Abstract Fast charging is significant for the driving convenience of an electric vehicle (EV). However, this technology causes lithium (Li)-ion batteries’ massive heat generation under such severe current rates. To ensure the thermal performance and lifespan of a Li-ion battery module under fast charging, an artificial neural network (ANN) regression method is proposed for a hybrid phase change material (PCM)—liquid coolant-based battery thermal management system (BTMS) design. Two ANN regression models are trained based on experimental data considering two targets: maximum temperature (Tmax ) and temperature standard deviation (TSD) of the hybrid cooling-based battery module. The regression accuracy reaches 99.942% and 99.507%, respectively. Four sets of experimental data are employed to validate the reliability of this method, and the cooling effect (Tmax and TSD) of the hybrid BTMS are predicted using the trained ANN regression models.
Journal Article

A Coupling Capacitor Double-Resonance Topology for Electric-Field Coupled Power Transfer System Using Vehicle Tire

2021-11-03
Abstract The electric-field coupled power transfer (ECPT) system with a coupling capacitor double-resonance circuit is proposed for electric vehicle (EV) charging. The article analyzes the plate capacitors between the EV and ground copperplate and introduces the coupling capacitor double-resonance circuit. The two-port network impedance matching of two topologies coupling capacitor double resonance is simulated, and then double side L impedance matching network and coupling capacitor double resonance with Series-Series (S-S) topology are proposed to solve the transmission efficiency decrease led by plate capacitances’ fluctuation. A prototype of the ECPT system is designed and built to prove the validity of the proposed methods. It is shown that the ECPT system realized higher than 60 W of electrical power, which is dynamic wireless transferred through the tire steel belt and the ground copperplate with at least 88% efficiency when the tires are rolling.
Standard

Performance Requirements and Test Procedures for Aftermarket Wheel Fastening Systems on Passenger Cars and Light Trucks

2021-11-03
CURRENT
J2316_202111
This SAE Recommended Practice provides a uniform procedure and performance requirements for evaluating fastening systems for normal highway use on aftermarket passenger cars and light trucks (except dual wheels, which are covered by SAE J1965) and multipurpose passenger vehicles. The fastening system includes the wheel, wheel bolts, and wheel nuts, as well as vehicle mating surface. The coefficients of friction for steel and aluminum mating surfaces are provided based on information available. Many factors must be considered in design and validation of wheel attachments for each specific vehicle. Where the procedure is used for original equipment applications the vehicle manufacturers specifications supersede those noted.
Standard

1000BASE-T1 Un-Shielded and Shielded Balanced Single Twisted Pair Ethernet Cable

2021-11-03
HISTORICAL
J3117/2_202111
This standard covers un-shielded (JUTP) and shielded (STP) balanced single twisted pair jacketed data cable intended for use in surface vehicle cables for 1 Gb/s ethernet applications. The tests in this standard are intended to qualify cables for normal operation in an automotive environment while maintaining the necessary electrical properties for reliable data transmission.
Standard

Software Support Concept

2021-11-03
WIP
JA1006
Historically, the supportability aspects of software have been given a very low priority in the overall program requirements. This was particularly prevalent during the acquisition phase, where funding and timing constraints were usually the top priorities. The result was inadequate product supportability, inadequate support funding, lack of good field data, and no meaningful analysis and optimization of possible support alternatives. In order to alleviate these historical concerns, this document presents a top-level structured overview of an overall software support concept and the information associated with it. This document was developed by the Supportability Subcommittee of the Society of Automotive Engineers (SAE) G-11 Reliability, Maintainability, Supportability, and Logistics (RMSL) Software Committee (G-11SW).
Standard

Software Supportability Program Standard

2021-11-03
WIP
JA1004
In 1994 the SAE G-11 Reliability, Maintainability, Supportability, and Logistics (RMSL) Division chartered a software committee, G-11SW, to create several software standards and guidance documents across the RMSL spectrum, including a software supportability program standard. The committee was formed as a cross section of international representatives from commercial industries and governments. The G-11SW committee has attempted to develop a standard that is consistent with a SAE G-11 system level supportability program standard and augmented by necessary software-specific support information. The G-11SW committee believes this document reflects the best current commercial practices, and meets the objectives of the United States Department of Defense Acquisition Reform initiative.
Standard

Software Reliability Program Implementation Guide

2021-11-03
WIP
JA1003
In 1994, the SAE G-11 Reliability, Maintainability, Supportability and Logistics (RMSL) Division chartered a software committee, G-11SW, to create several software standards and guidance documents across the RMSL spectrum, including a software reliability program standard and implementation guidelines. The committee was formed as a cross section of international representatives from commercial industries and governments. The G-11SW committee has developed a standard (JA1002) and these implementation guidelines (JA1003) that are consistent with a SAE G-11 system level reliability program standard (JA1000) and guidelines (JA1000-1), augmented by necessary software-specific information. The G-11SW committee believes these documents reflect the best current commercial practices, and meet the objectives of the United States Department of Defense Acquisition Reform initiative and the North Atlantic Treaty Organization (NATO) Reliability Program.
Standard

Recommended Test Procedure for Powered Gas Brake Control Systems

2021-11-03
CURRENT
J2604_202111
This test procedure is for qualification testing of powered gas/brake control systems to assure compliance with the recommended practices for these assistive devices. A powered gas/brake control system which passes all of the tests shall be considered to be in compliance with the recommended practices. The control shall pass all tests denoted by a “shall” in the recommended practice or the recommended test procedure (RTP). All the results of all tests and requirements denoted by a “should” shall be noted, but failure to comply will not constitute failure to pass the test.
Standard

Software Supportability - An Overview

2021-11-03
WIP
AIR5121B
This SAE Aerospace Information Report (AIR) provides an overview of the issues relating to the support and supportability of software in computer-based systems. It has general applicability to all sectors of industry and commerce and to all types of equipment that contain software. The software support issues and activities summarized in this report are reasonably easy to comprehend. The reader should not be mislead into believing development of supportable software is easy to achieve. The target audience for the document includes software acquisition organizations, developers, supporters, and end-use customers.
Standard

Software Reliability Program Standard

2021-11-03
WIP
JA1002
In 1994, the SAE G-11 Reliability, Maintainability, Supportability and Logistics (RMSL) Division chartered a software committee, G-11SW, to create several software standards and guidance documents across the RMSL spectrum, including a software reliability program standard. The committee was formed as a cross section of international representatives from commercial industries and governments. The G-11SW committee has attempted to develop a standard that is consistent with a SAE G-11 system level reliability program standard and augmented by necessary software-specific support information. The G-11SW committee believes this document reflects the best current commercial practices, and meets the objectives of the United States Department of Defense Acquisition Reform initiative.
Journal Article

Integration of Solar-Power in Electric Vehicle Industry

2021-11-03
Abstract The electric vehicle market is expected to put a large strain on the existing electricity grid. Additionally, the majority of grid electricity is produced from the combustion of fossil fuels, negating the environmental benefits of electric vehicles. As such, it is necessary to evaluate the “green” options that will allow electric vehicles to break away from the grid—solar power. Solar power uses photovoltaic cells to convert sunlight into electricity, which can then go into recharging a car’s battery. Its existing usage has been limited due to cost and efficiency concerns; however, recent improvements in technology have made them viable. In particular, new materials have driven the cost down to $0.30 per Watt. Meanwhile, different thin-cell silicon materials are achieving efficiencies in excess of 20%. This article evaluates these advances and analyzes the applicability of solar-power for vehicles.
Technical Paper

Dissecting Robust Resource Partitioning, Robust Time Partitioning, and Robust Partitioning in CAST-32A

2021-11-03
2021-01-5101
CAST-32A strategy for MCP certification builds upon the key terms of robust resource partitioning, robust timing partitioning, and robust partitioning. In this work, we provide technical insight on the interpretation of these terms by building on derivative terms such as resource capacity, capacity allocation, and capacity verification and violation. We discuss on the scope of applicability of these terms from the low-level hardware components up to the complete MCP platform. We also dig into the complexities in implementing robust resource and time partitioning, and show that those concepts must be applied bottom-up from hardware-shared resources up to the whole platform. We also show that, while robust resource partitioning is the preferred choice, it can only be realistically applied to some resources and, in many cases, robust time partitioning is the only choice.
Standard

Trimmable Horizontal Stabilizer Actuator Structural Load Path Integrity Monitoring Principles

2021-11-02
WIP
AIR6226A
Most of the Trimmable Horizontal Stabilizer Actuators (THSA) feature a dual structural load path, the primary load path being loaded, the secondary load path being normally unloaded, or both load paths sharing in parallel the Horizontal Stabilizer load. This document describes existing methods for detecting rupture or disconnection of loaded load paths as an overview for those specifying or designing Horizontal Stabilizer Trim Actuators in order to compare existing solutions as reference for implementation in new aircraft programs.
X