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Simultaneous NOX and CO2 Reduction for Meeting Future CARB Standards Using a Heavy-Duty Diesel CDA-NVH Strategy

SAE International Journal of Engines

Eaton, USA-James E McCarthy, Matthew Pieczko
Southwest Research Institute, USA-Gary Neely, Chris Sharp
  • Journal Article
  • 03-13-02-0014
Published 2019-12-10 by SAE International in United States
Commercial vehicles require continual improvements in order to meet fuel consumption standards, improve diesel aftertreatment (AT) system performance, and optimize vehicle fuel economy. Simultaneous reductions in both CO2 and NOX emissions will be required to meet the upcoming regulatory targets for both EPA Phase 2 Greenhouse Gas Standards and new Low NOX Standards being proposed by the California Air Resources Board (CARB). In addition, CARB recently proposed a new certification cycle that will require high NOX conversion while vehicles are operating at lower loads than current regulatory cycles require. Cylinder deactivation (CDA) offers a powerful technology lever for meeting these two regulatory targets on commercial diesel engines. There have been numerous works in the past year showing the benefits of diesel CDA for elevating exhaust temperatures during low-load operation where it is normally too cold for AT to function at peak efficiency. At the same time, CO2 and fuel consumption are reduced through a combination of lower pumping and friction losses and improved thermal efficiency in the cylinders that are still firing. However, CDA has…
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Narrower focus, BIGGER PAYOFF

SAE Truck & Off-Highway Engineering: December 2019

Terry Costlow
  • Magazine Article
  • 19TOFHP12_03
Published 2019-12-01 by SAE International in United States

Design teams are targeting focused markets for their commercial electric-vehicle programs to combat challenges like range and infrastructure.

Government regulations are prompting a changeover to electric powertrains, with early growth coming in commercial vehicle applications where range and recharging are more easily managed. Greater expansion will require revisions in maintenance and broader availability of charging stations as well as improved driving ranges.

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PLASTICS INNOVATIONS 2019

SAE Truck & Off-Highway Engineering: December 2019

Lindsay Brooke
  • Magazine Article
  • 19TOFHP12_05
Published 2019-12-01 by SAE International in United States

The 49th annual SPE Automotive Awards highlight the ongoing benefits of lightweight polymers and composites.

The Society of Plastics Engineers (SPE) annual Automotive Innovation Awards Competition, now in its 49th year, is considered the “Oscars” for those developing polymer and composites-intensive components, systems and vehicles. Winners of the 2019 competition topped an incredible field of entries that continue to show the benefits of lightweight, durable plastics across the spectrum of vehicle applications.

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Akasol packs industry-leading energy density into new battery design

SAE Truck & Off-Highway Engineering: December 2019

Bill Visnic
  • Magazine Article
  • 19TOFHP12_08
Published 2019-12-01 by SAE International in United States

Projecting the market for full-electric and hybrid-electric commercial vehicles will continue to expand, Germany-based lithium-ion battery specialist Akasol recently announced production-readiness of a newly-developed battery pack that sets an energy-density benchmark. The company's president also confirmed Akasol will build a manufacturing facility in the Detroit area targeted to begin production in mid-2020.

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Q&A

SAE Truck & Off-Highway Engineering: December 2019

Ryan Gehm
  • Magazine Article
  • 19TOFHP12_13
Published 2019-12-01 by SAE International in United States

Together with its many partners, ZF supplies camera and radar technology and advanced components for both the passenger car and commercial truck markets, the latter being especially suited for the move to more complex driver-assistance systems, according to Dan Williams, director of ADAS & Autonomy at ZF. “The business case in commercial vehicle for reduction in driver hours of service, fuel cost reduction and safety have strong economic incentives to adopt ADAS/automated driving technology. Additionally, the regulations placed on the industry will require our customers to utilize certain solutions,” he said.

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Removing complexity for AUTONOMOUS TRUCKS

SAE Truck & Off-Highway Engineering: December 2019

Terry Costlow
  • Magazine Article
  • 19TOFHP12_04
Published 2019-12-01 by SAE International in United States

Narrowing the operating domains for driverless commercial vehicles reduces the requirements of autonomous technology and speeds time to market.

Developers of driverless trucks are eliminating some of the complexity of automated driving in hope of hastening time to market. They are limiting the nearly immeasurable scope of circumstances - the operating design domain (ODD) - that face driverless vehicles by deploying a variant of platooning, or narrowing the operational parameters for transporting goods. Driver shortages, growth in shipments of online purchases and the never-ending push to trim costs are among the factors that have led many to predict that commercial trucking will be an early adopter of autonomy.

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EDITORIAL: Hop on the hydrogen highway

SAE Truck & Off-Highway Engineering: December 2019

Editor-in-Chief-Ryan Gehm
  • Magazine Article
  • 19TOFHP12_06
Published 2019-12-01 by SAE International in United States

Two years ago at the inaugural North American Commercial Vehicle (NACV) Show in Atlanta, a recurring theme from nearly every truck manufacturer and supplier press conference was vehicle uptime, along with the various telematics and connectivity solutions that enable fleet managers to keep their trucks on the road. While these certainly were important topics at this year's NACV Show, the dominant takeaway from the Georgia World Congress Center was that alternative propulsion is top of mind for many industry players.

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Child Safety Lock Override Mechanism - For Woman Safety

Hyundai Motor India Engineering Pvt Ltd.-Ravi Kumar S, Priya K
  • Technical Paper
  • 2019-28-2403
Published 2019-11-21 by SAE International in United States
Child safety lock override mechanism - For Woman Safety Woman safety is a major concern in present world and the related laws ensure that government also cares for it. Mostly in public taxies, there is possibility for the driver to harass women occupant by activating the child safety lock without her knowledge. Purpose of child safety lock is to prevent child in the rear seat from opening the door and fall from vehicle. This will cause severe injury to the child. When child lock is ON, Inside Door handle becomes inoperative and the child cannot open the door. Only way to open door is through outside handle. But there is possibility for Taxi driver to kidnap the woman customer by enabling child safety lock, so that inside handle becomes inoperative and make her get trapped in car. To prevent such cases in future, Ministry of Road Transport ordered the manufacturers to delete child safety lock for all commercial vehicles. But even then, Child in rear seat of a taxi (Without child lock) and women in…
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Aerodynamic analysis of commercial vehicle using active vortex generators concept

ARAI Academy-Saurabh Jayant Kulkarni, Kamalkishore Vora
Automotive Research Association of India-Mohammad Rafiq Agrewale
  • Technical Paper
  • 2019-28-2409
Published 2019-11-21 by SAE International in United States
Any physical body being propelled through the air has drag associated with it. Drag will be created on the surface of the vehicle due to the flow separation at the rear end. In aerodynamics the flow separation can often result in increased drag particularly pressure drag, to delay the flow separation, the vortex generators are used on the roof end of the vehicle just before the point of flow separation. The objective of this project is to perform aerodynamic analysis of commercial vehicle using active vortex generators concept. First, the aerodynamic analysis of a baseline commercial vehicle model is performed and same is validated with the scaled model by using a wind tunnel test. Further analysis has been done by using active vortex generators concept with variation of angle of attacks for vehicle speed of 50, 70, 90 kmph. Also, analysis has been carried out for six different yaw angles. The simulation is carried out with the use of ANSYS Fluent. The simulation result shows the significant drag coefficient reduction of the commercial vehicle with…
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Replacing Twin Electric Fan Radiator with Single Fan Radiator

Engine Design & Testing-Tushar Warkhade
Tata Technologies, Ltd.-Aashish Bhargava, Gaurav Soni
  • Technical Paper
  • 2019-28-2381
Published 2019-11-21 by SAE International in United States
Downsizing is one of the crucial activities being performed by every automotive engineering organization. The main aim is to reduce - Weight, CO2 emissions and achieve cost benefit. All this is done without any compromise on performance requirement or rather with optimization of system performance.This paper evaluate one such optimization, where-in radiator assembly with two electric fan is targeted for downsizing for small commercial vehicle application. The present two fan radiator is redesigned with thinner core and use of single fan motor assembly. The performance of the heat exchanger is tested for similar conditions back to back on vehicle and optimized to get the balanced benefit in terms of weight, cooling performance and importantly cost. This all is done without any modification in vehicle interface components except electrical connector for fan. The side members and brackets design is also simplified to achieve maximum weight reduction.Further Cooling system performance of engine is evaluated along with Fuel efficiency; results are compared with present configuration.
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