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Toyota unveils rear-drive FCEV Mirai, plug-in RAV4

Automotive Engineering: November/December 2019

Paul Seredynski
  • Magazine Article
  • 19AUTP11_15
Published 2019-11-01 by SAE International in United States

As part of an electrified stable primed for the 2019 Los Angeles Auto Show (LAAS), Toyota will display its all-new Mirai fuel-cell electric vehicle (FCEV) and the upcoming plug-in hybrid version of its RAV4 compact SUV. The two 2021 models will further pad the Japanese company's already market-leading six hybrid offerings (12 if the premium Lexus brand is included). On top of previously announced plans for a “major battery electric vehicle (BEV) rollout,” Toyota also announced an extension of its hybrid battery warranties.

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Development of Hardware and Software for On-Board Hydrogen System

SAE International Journal of Advances and Current Practices in Mobility

Tongji University-Wenya Jia, Tiancai Ma, Chuan Ye
  • Journal Article
  • 2019-01-0377
Published 2019-04-02 by SAE International in United States
The fuel cell engine is considered to be the ultimate technical direction for the development of vehicle power. The on-board hydrogen supply system is important in fuel cell system. However, the on-board hydrogen supply system is diversified, and the management is mostly integrated in the engine controller. Thus, the fuel cell engine controller is excessive coupled with design of on-board hydrogen supply system. In order to improve the portability and compatibility of the fuel cell engine controller, an independent controller of the on-board hydrogen supply system is designed. Meanwhile, the hardware and software are developed to control 35Mpa gaseous hydrogen storage system. After being tested in a high-pressure environment, the controller can detect temperature, pressure and ambient hydrogen concentration of the hydrogen supply system. Simultaneously, it can drive and control the hydrogen cylinder valve. Besides, the controller can communicate with the Campus Area Network (CAN) bus of the fuel cell engine through the CANPro protocol analysis platform software. It is verified that the infrared signal waveform emitted by the infrared transmitting module complies with the…
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A Dual Fuel Hydrogen - Diesel Compression Ignition Engine and Its Potential Application in Road Transport

Czech Technical University in Prague-Jiri Vavra, Ivan Bortel, Michal Takats
Published 2019-04-02 by SAE International in United States
In this paper investigations of hydrogen use as a main fuel for a compression ignition engine with pilot injection of diesel fuel will be presented. The experiments were performed in steady state conditions on a single cylinder research compression ignition engine with a bore of 85 mm and piston stroke of 90 mm, coupled with an electric dynamometer. The diesel engine with optimized compression ratio was equipped with a diesel fuel direct injection common rail system. A homogeneous mixture of air and hydrogen was formed using a port fuel injection. The influence of hydrogen share on total fuel energy was systematically investigated between limits given by the pure diesel operation and up to a maximum hydrogen share, reaching 98% by energy. The tested hydrogen share was constrained by practical limits at various loads between 4 and 16 bar of IMEP with simulation of the real turbocharger performance and at three engine speeds. It was observed that increase in the hydrogen share reduces emissions of CO2 and CO proportionally with decrease in carbon content in the…
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Development of Hydrogen Fuel Cell Bus Technology for Urban Transport in India

Tata Motors Ltd.-Yogesha S A, Smitan Brahmbhatt, Munusamy Raja, Suresh Arikapudi, Bhaveshkumar Bhut, Jaikumar V
Published 2019-01-09 by SAE International in United States
Polymer Electrolyte Membrane Fuel Cell (PEMFC) technology is considered for automotive applications due to rapid start up, energy efficiency, high power density and less maintenance. In line with National Hydrogen Energy Roadmap of Govt. of India that aims to develop and demonstrate hydrogen powered IC engine and fuel cell based vehicle. TATA Motors Ltd. has designed, developed and successfully demonstrated “Low Floor Hydrogen Fuel Cell Bus” which comprises of integrated fuel cell power system, hydrogen storage and dispensing system.The fuel cell power system, converts the stored chemical energy in the hydrogen to DC electrical energy. The power generated is regulated and used for powering the traction motor. The development of fuel cell bus consists of five stages: Powertrain sizing as per vehicle performance targets, fuel cell stack selection and balance of plant design and development, bus integration, hydrogen refueling infrastructure creation and testing of fuel cell bus. Fuel cell stack integrated with balance of components, which includes air subsystem, hydrogen subsystem, and thermal management system and water recovery unit. Integrated fuel cell power system tested…
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Standard for Fuel Systems in Fuel Cell and Other Hydrogen Vehicles

Fuel Cell Standards Committee
  • Ground Vehicle Standard
  • J2579_201806
  • Current
Published 2018-06-15 by SAE International in United States
The purpose of this document is to define design, construction, operational, and maintenance requirements for hydrogen fuel storage and handling systems in on-road vehicles. Performance-based requirements for verification of design prototype and production hydrogen storage and handling systems are also defined in this document. Complementary test protocols (for use in type approval or self-certification) to qualify designs (and/or production) as meeting the specified performance requirements are described. Crashworthiness of hydrogen storage and handling systems is beyond the scope of this document. SAE J2578 includes requirements relating to crashworthiness and vehicle integration for fuel cell vehicles. It defines recommended practices related to the integration of hydrogen storage and handling systems, fuel cell system, and electrical systems into the overall Fuel Cell Vehicle.
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Paccar reveals new and future tech at CES 2018

SAE Truck & Off-Highway Engineering: February 2018

Bill Visnic
  • Magazine Article
  • 18TOFHP02_08
Published 2018-02-01 by SAE International in United States

Although 2018 marked its first-ever presence at the enormously influential Consumer Electronics Show (CES), Paccar made sure it fit right in with the show's technology- and transportation-sector veterans by unveiling a pair of big-rig demonstrators that show the way the multi-faceted OEM plans to address expanding interest in autonomous driving and more environmentally-conscious operations.

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CLARITY OF PURPOSE

Automotive Engineering: April 2017

Bill Visnic
  • Magazine Article
  • 17AUTP04_02
Published 2017-04-01 by SAE International in United States

With the 2017 Clarity Fuel Cell, Honda gets serious about fuel-cell power and a hydrogen infrastructure.

We expected some pop and sizzle-at least something vaguely adventurous-to mark the occasion of refueling Honda's all-new 2017 Clarity Fuel Cell sedan with compressed hydrogen pumped in at a heady 10,153 psi (700 bar).

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Advancements and Opportunities for On-Board 700 Bar Compressed Hydrogen Tanks in the Progression Towards the Commercialization of Fuel Cell Vehicles

SAE International Journal of Alternative Powertrains

AOC, LLC-Thomas Steinhausler
Crosslink Technologies-Anand Rau
  • Journal Article
  • 2017-01-1183
Published 2017-03-28 by SAE International in United States
Fuel cell vehicles are entering the automotive market with significant potential benefits to reduce harmful greenhouse emissions, facilitate energy security, and increase vehicle efficiency while providing customer expected driving range and fill times when compared to conventional vehicles. One of the challenges for successful commercialization of fuel cell vehicles is transitioning the on-board fuel system from liquid gasoline to compressed hydrogen gas. Storing high pressurized hydrogen requires a specialized structural pressure vessel, significantly different in function, size, and construction from a gasoline container. In comparison to a gasoline tank at near ambient pressures, OEMs have aligned to a nominal working pressure of 700 bar for hydrogen tanks in order to achieve the customer expected driving range of 300 miles. Beyond the need to contain pressure, the hydrogen tanks also differ from gasoline fuel tanks because of the additional vehicle space needed due to the lower hydrogen energy volumetric density even with the highly efficient fuel cell (four times the external volume of a gasoline tank including the fuel cell efficiency benefit). The main difference and…
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Hydrogen-Powered Fuel Cell Range Extender Vehicle – Long Driving Range with Zero-Emissions

HyCentA Research GmbH-Patrick Salman, Eva Wallnöfer-Ogris, Markus Sartory, Alexander Trattner, Manfred Klell
IFA - Vienna University of Technology-Johannes Höflinger, Peter Hofmann
Published 2017-03-28 by SAE International in United States
The continuous increasingly stringent regulations for CO2 fleet targets request the introduction of zero-emission solutions in the near future. Moreover, additional customer benefits have to be generated in order to increase customer acceptance of zero-emission technologies. Actually high costs, reduced driving ranges and lack of infrastructures are some aggregative facts for end-customer acceptance thus also for a broad market launch. Plug-in hybrids as intermediate step towards zero-emission vehicles are meanwhile in series production with partly “zero-emission” operation mode and are well accepted by customers. The project partners HyCentA Research GmbH, Magna Steyr Engineering AG & Co KG, Proton Motor Fuel Cell GmbH and the Vienna University of Technology, Institute for Powertrains and Automotive Technology, have developed a hydrogen-powered zero-emission vehicle within a national funded research project. The combustion engine of an existing range extender shuttle van was substituted by a 25 kW proton-exchange-membrane fuel cell system. In addition, the battery capacity was reduced due to weight, size and costs reasons. Approaches for the complete vehicle integration of the fuel cell range extender and the 70…
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Development of New Hydrogen Fueling Method for Fuel Cell Motorcycle

SAE International Journal of Alternative Powertrains

Honda R & D Americas Inc.-Steven Mathison
Honda R&D Co., Ltd.-Kiyoshi Handa, Shigehiro Yamaguchi, Kazuya Minowa
  • Journal Article
  • 2017-01-1184
Published 2017-03-28 by SAE International in United States
A new hydrogen fueling protocol named MC Formula Moto was developed for fuel cell motorcycles (FCM) with a smaller hydrogen storage capacity than those of light duty FC vehicles (FCV) currently covered in the SAE J2601 standard (over than 2kg storage). Building on the MC Formula based protocol from the 2016 SAE J2601 standard, numerous new techniques were developed and tested to accommodate the smaller storage capacity: an initial pressure estimation using the connection pulse, a fueling time counter which begins the main fueling time prior to the connection pulse, a pressure ramp rate fallback control, and other techniques. The MC Formula Moto fueling protocol has the potential to be implemented at current hydrogen stations intended for fueling of FCVs using protocols such as SAE J2601. This will allow FCMs to use the existing and rapidly growing hydrogen infrastructure, precluding the need for exclusive dispensers or stations.
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