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Electronic Control of Brake and Accelerator Pedals for Precise Efficiency Testing of Electrified Vehicles

Southwest Research Institute-Michael C. Gross, Jonathan Hamermesh, Kyle Jonson, Joshua Alden
  • Technical Paper
  • 2020-01-1282
To be published on 2020-04-14 by SAE International in United States
Efficiency testing of hybrid-electric vehicles is challenging, because small run-to-run differences in pedal application can change when the engine fires or the when the friction brakes supplement regenerative braking, dramatically affecting fuel use or energy regeneration. Electronic accelerator control has existed for years, thanks to the popularity of throttle-by-wire (TBW). Electronic braking control is less mature, since most vehicles don’t use brake-by-wire (BBW). Computer braking control on a chassis dynamometer typically uses a mechanical actuator (which may suffer backlash or misalignment) or braking the dynamometer rather than the vehicle (which doesn’t yield regeneration). The growth of electrification and autonomy provides the means to implement electronic brake control. Electrified vehicles use BBW to control the split between friction and regenerative braking. Automated features, e.g. adaptive cruise control, require BBW to actuate the brakes without pedal input. We present a system for computer control of brake and accelerator inputs on a TBW- and BBW-equipped vehicle. The system injects analog signals into the vehicle’s wiring harness, bypassing the pedals and obviating mechanical actuation and brake-by-dyno. The system combines…
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WIRE, ELECTRICAL, POLYTETRAFLUOROETHYLENE/POLYMIDE INSULATED, LIGHT WEIGHT, SILVER COATED, HIGH STRENGTH OR ULTRA HIGH STRENGTH COPPER ALLOY, 200 °C, 600 VOLT, ROHS

AE-8D Wire and Cable Committee
  • Aerospace Standard
  • AS22759/81C
  • Current
Published 2020-03-24 by SAE International in United States
No Abstract Available.
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CONTACTS, ELECTRICAL, CONNECTOR, SOCKET, CRIMP REMOVABLE (FOR AS81714 TERMINAL JUNCTION SYSTEM SERIES II)

AE-8C1 Connectors Committee
  • Aerospace Standard
  • AS39029/22D
  • Current
Published 2020-03-24 by SAE International in United States
No Abstract Available.
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WIRE, ELECTRICAL, POLYTETRAFLUOROETHYLENE/POLYMIDE INSULATED, LIGHT WEIGHT, SILVER COATED, COPPER CONDUCTOR, 200 °C, 600 VOLT, ROHS

AE-8D Wire and Cable Committee
  • Aerospace Standard
  • AS22759/91C
  • Current
Published 2020-03-24 by SAE International in United States
No Abstract Available.
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WIRE, ELECTRICAL, POLYTETRAFLUOROETHYLENE/POLYMIDE INSULATED, LIGHT WEIGHT, NICKEL COATED, HIGH STRENGTH OR ULTRA HIGH STRENGTH COPPER ALLOY, 260 °C, 600 VOLT, ROHS

AE-8D Wire and Cable Committee
  • Aerospace Standard
  • AS22759/82C
  • Current
Published 2020-03-24 by SAE International in United States
No Abstract Available.
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Cable Impedance Calculations Employed in Designing Aerospace Electrical Power Systems

Astronics AES-Jon Fifield
  • Technical Paper
  • 2020-01-0037
Published 2020-03-10 by SAE International in United States
This paper presents design considerations in utilizing cable impedance calculations in the design of an aerospace electrical power system (EPS). Past wiring design guidelines featured a tabular set of data based on a single-point design reference. This results in a cable selection which adds unnecessary weight and under-utilized the wire’s performance ability when considering a vehicle’s design requirements. Present wiring design guidelines have lagged behind the growing movement to achieve an optimized wire selection. Understanding the shortfalls with past and present wiring design methods will improve future methods to comply with increasingly restrictive vehicle performance requirements. This paper will discuss two of the most important design requirements for future aerospace electrical power and distribution feeders, which are weight and thermal limits assigned to an EPS design.
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Fundamentals in Wire Selection and Sizing for Aerospace Applications

AE-7C Systems
  • Aerospace Standard
  • AIR6540A
  • Current
Published 2020-03-06 by SAE International in United States
The scope of this report is to capture fundamental principles of selecting a wire size for an aerospace application using the method prescribed in the AS50881 standard and additional calculations, not found in AS50881, to ensure the wire selection will adequately perform in the specific physical and environment conditions. This report covers wire selection and sizing as part of the electrical wire interconnection systems (EWIS) used in aerospace vehicles. Aerospace vehicles include manned and unmanned airplanes, helicopters, lighter-than-air vehicles, missiles, and external pods. This document does not apply to wiring inside of airborne electronic equipment but shall apply to wiring externally attached to such equipment. Wire selection must consider physical and environmental factors to size wires such that they have sufficient mechanical strength, do not exceed allowable voltage drop levels, are protected by materials or circuit protection devices, and meet circuit current carrying requirements. For electrical power feeders and distribution, or EWIS applications, other information and environmental and installation limitations are also needed to adequately evaluate and select the correct wire size for a specific…
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15 Pole Connector Between Towing Vehicles and Trailers with 12 Volt Nominal Supply

Truck and Bus Electrical Systems Committee
  • Ground Vehicle Standard
  • J2691_202002
  • Current
Published 2020-02-25 by SAE International in United States
This SAE Standard establishes the minimum construction and performance requirements for a 15 pole connector between towing vehicles and trailers, for trucks, trailers, and dollies, for 12 VDC nominal applications in conjunction with SAE J2742. The connector accommodates both power and ISO 11992-1 signal circuits along with dual ground wires to accommodate grounding requirements within the constraints of the SAE J2691 terminal capacity.
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Heavy-Duty Wiring Systems for Trailers 2032 mm or More in Width

Truck and Bus Electrical Systems Committee
  • Ground Vehicle Standard
  • J2174_202002
  • Current
Published 2020-02-25 by SAE International in United States
This SAE Standard establishes the minimum performance requirements for electrical distribution systems for use in dollies and trailers in single or multiple configurations for 12 VDC nominal applications.
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Primary and Auxiliary Seven Conductor Electrical Connector for Truck-Trailer Jumper Cable

Truck and Bus Electrical Systems Committee
  • Ground Vehicle Standard
  • J560_202002
  • Current
Published 2020-02-25 by SAE International in United States
This SAE Standard provides the minimum requirements for primary and auxiliary jumper cable plug and receptacle for the truck-trailer and converter dolly jumper cable systems for 12 VDC nominal applications. It includes the test procedures, design, and performance requirements.
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