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Variation in System Performance while Sorting DEF Heating Hardware Options

Peterbilt Motors Co.-Kyle Gilliam, Treaver Leonard
PACCAR Inc.-Darren Erickson
Published 2018-09-10 by SAE International in United States
The desire to reduce NOx at low ambient temperatures drives the use of heating methods to make DEF available by thawing the solution in the tank. Methods to validate modelling used to design hardware options require testing to gauge the accuracy of the prediction. Using a climatic chassis dynamometer (CCD) to demonstrate the guidance procedure set by the Environmental Protection Agency (EPA) is expensive and time consuming. A method of utilizing a flow controlled cooling supply combined with a standard cold chamber is described as a precursor to running the demonstration in the CCD. Testing multiple quantities of design iterations produced unexpected variation in the results. The sources of the variation and modifications taken to minimize them are discussed and presented. Test to test control of coolant flow, coolant temperature, and specific chamber temperature inconsistencies were found to be critically important to a successful effort. Several design iterations were compared with varying degrees of success. The method was modified as variation between tanks of the same design was noted. System description details as well as…
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Innovative Door Design for Commercial Vehicles

Peterbilt Motors Co.-Terry Manuel
Kenworth Truck Co.-Melissa Trumbore
Published 2014-09-30 by SAE International in United States
Design of body structures for commercial vehicles differs significantly from automotive due to government, design and usage requirements. Specifically, heavy truck doors are not required to meet side impact requirements due to their height off the ground as compared to automobiles. However, heavy truck doors are subjected to higher loads, longer life, and cannot experience permanent deformation from overload events.Aluminum has been used intensively in commercial vehicle doors and cab structures for over 50 years by several different manufacturers in North America. It has been only in the last few years that aluminum has appeared in automotive door structures other than in high-end luxury vehicles. Commercial vehicle customers are expecting the same features found in premium automobiles resulting in opportunities to learn from each other's designs.In order to optimize the strength and weight of a commercial vehicle door, a new aluminum intensive structure was developed. The new structure featured a unique architecture that was the first in the industry to use a multi-cavity aluminum extrusion joined to stamped sheet reinforcements in order to provide a…
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Trucking's Challenge for the Nineties - Electronics Integration

Peterbilt Motors Co.-Mark Herman
Published 1990-10-01 by SAE International in United States
For the Trucking Industry to meet challenges such as increased competition and tighter emission controls the successful integration of electronics on heavy duty vehicles of the nineties will be required. Electromagnetic Compatibility (EMC) , Control and Communications, Service and Maintenance, and the Benefits of Electronics are addressed.
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Design Weight Reduction and Attendant Economics

Peterbilt Motors Co.-George U. Brumbaugh
Published 1964-01-01 by SAE International in United States
Weight reduction designed into highway vehicles can be made to pay off in a variety of ways, but the largest by far, is hauling of greater payloads within legal weight limits.General areas of weight reduction are: use of lesser amounts of similar materials, utilization of lighter materials, use of lighter components for the same purpose, and elimination of unnecessary parts.Cost increases required to save weight vary over a wide range, and may even be negative in some cases. Value to the operator of the pound saved depends on a multitude of factors, including ability to replace lighter tare weight with payload, degree of utilization, and amount of revenue from hauling the extra pound.
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PROBLEMS OF THE AUTOMOTIVE ENGINNEER

Peterbilt Motors Co.-E. S. ROSS
Published 1948-01-01 by SAE International in United States
No Abstract Available.
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