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Viewing 1 to 14 of 14
1998-02-23
Technical Paper
980734
Steven A. Crawford, Timothy A. McMahan, Richard G. Van Ryper
The sensitivity of a rotary seal ring to transmission manufacturing operations and assembly techniques can effect the overall quality of an automatic transmission. In addition to those characteristics that make a seal functional in an automatic transmission there are other characteristics that facilitate the ease and simplicity of assembly in commercial manufacture. A combination of material properties, design, and manufacturing techniques combine to make thermoset polyimide seal rings an attractive alternative to other materials now in use.
1998-02-23
Technical Paper
980717
Richard Luxgrant, Donald Vesey
The purpose of this study was to analyze and quantify the effects of accelerated weathering on the surface of various “weatherable” polymers currently utilized for molded-in-color exterior automotive applications. Evaluations consisted of gloss/color retention and surface changes after accelerated weathering exposure, with and without intermittent washing, to simulate product life cycle. Results were found to be affected by both polymer type and interim surface treatments. Data are presented as a means to define specific performance and aesthetic capabilities of these various polymers in a mold-in-color environment to optimize material selection for related component applications.
1998-02-23
Technical Paper
980102
Monica H. Prokopyshen, Mark A. Bindbeutel, John C. Hess
Life cycle benefits of a chrome-free sealing wash were evaluated. Material consumption, disposal costs, water pretreatment, waste water treatment and product performance were used to compare a chrome-free product to traditional washes. Acquisition costs and vehicle weight impacts were also considered. The direction of domestic and international regulatory initiatives will play a significant part in the application of this study=s findings. The paper discusses the factors and decision process that led to the trial of chrome free rinse in a vehicle assembly plant and the results of this test. Durability testing was performed with current and evolving primer systems. Equivalent durability was shown with multiple supplier/multiple primer process combinations. The study indicated that chrome-free sealing wash would yield a small cost savings and a minor reduction in weight with equal performance to the current chrome containing process.
1998-02-23
Technical Paper
980093
Gerald R. Winslow, Shawn X. Liu, Susan G. Yester
Hand dismantling of end of life vehicles (ELV) may have limited use on recovering the majority of materials that will be in our future automobiles. Research is being conducted on automated methods to recover pure plastics from automotive shredder residue (ASR). As part of USCAR initiative, the Vehicle Recycling Partnership (VRP), a cooperative effort among Chrysler, Ford and General Motors undertook a study to determine the feasibility of obtaining pure plastics from ASR using density and skin flotation separation technologies. The total project concept is described in this paper including important elements such as the detailed dismantling of a baseline vehicle to define total plastics complexity, shredding vehicles, collecting ASR samples and performing R&D work on automated recovery methodologies.
1998-02-23
Technical Paper
980972
Lori Everitt, John Fialka, Michael Kerman, Edward Laabs
A variety of energy absorbing foams were evaluated to address the Federal Motor Vehicle Safety Standard (FMVSS) 201 extended rule requirements for automotive interior head impact protection. The methodology used for the comparative study was the “Fast Path System” developed in part by Chrysler Corporation to provide a quick and reliable procedure to compare different materials and designs for energy management. Polyurethane, expanded polypropylene and expanded polystyrene energy absorbing foams were evaluated in this study.
1997-02-24
Technical Paper
970265
Suresh T. Gulati, Lisa F. Jones, Michael J. Brady, Ron Baker, Barry Kessler, Mike Zammit, Benny Snider, Sivanandi Rajadurai
An advanced three-way converter system with significant improvements in light-off performance, conversion efficiency, thermal stability and physical durability at high operating temperature is described. The converter system is comprised of a light-weight ceramic substrate with high surface area triangular cell structure, a new catalyst formulation with enhanced thermal stability and good substrate compatibility, and a durable packaging design which together lead to consistent improvements in high temperature performance and durability. Experimental data including FTP performance, canning trials, and high temperature vibration and thermal shock tests for both the advanced and standard three-way converter systems are presented.
1998-09-29
Technical Paper
982339
Richard Luxgrant, Donald Vesey
This study was conducted to analyze and quantify the effects of accelerated weathering on the surface of various “weatherable” polymers currently utilized for molded-in-color exterior automotive applications. Evaluations consisted of gloss/color retention and surface changes after accelerated weathering exposure, with and without intermittent washing, to simulate product life cycle. Results were found to be affected by both polymer type and interim surface treatments. Data are presented as a means to define specific performance and aesthetic capabilities of these various polymers in a mold-in-color environment to optimize material selection for related component applications.
2008-04-14
Journal Article
2008-01-1156
Francine Bovard, Janice Tardiff, Tracie Piscopink-Jafolla, Duncan McCune, Greg Courval, Kevin A. Smith, Fred Lee, Sridhar Ramamurthy, Ray Singleton, Florina M. Vartolas
A task group within the SAE Automotive Corrosion and Protection (ACAP) Committee continues to pursue the goal of establishing a standard test method for in-laboratory cosmetic corrosion evaluations of finished aluminum auto body panels. The program is a cooperative effort with OEM, supplier, and consultant participation and is supported in part by USAMP (AMD 309) and the U.S. Department of Energy. Numerous laboratory corrosion test environments have been used to evaluate the performance of painted aluminum closure panels, but correlations between laboratory test results and in-service performance have not been established. The primary objective of this project is to identify an accelerated laboratory test method that correlates with in-service performance. In this paper the type, extent, and chemical nature of cosmetic corrosion observed in the on-vehicle exposures are compared with those from some of the commonly used laboratory tests
1970-02-01
Technical Paper
700072
ROBERT W. HARRIES, TED SKONIECZNY
1958-01-01
Technical Paper
580109
S. B. TWISS, E. H. LOESER, R. C. WIQUIST
1999-03-01
Technical Paper
1999-01-0997
Xin Wu, Hongqi Hao, Guohua Zhang, Cindy Renault, Dale Frendberg
Adhesive joining is a common autobody subassembly technique especially for outer panels, where visible spot welding is objectionable. To accommodate mass production with the use of certain adhesives very high thermal gradient usually exists, which may result in panel dimensional distortion and variation. The temperature distribution over location and over time are monitored, and its impact to panel dimension is investigated. Experimental results on the effect of the distance between panel and induction coil on the panel temperature is obtained. The thermal induced shape distortion is simulated with a simplified FEA model. The approach to improvement of the induction curing process is discussed.
1999-03-01
Technical Paper
1999-01-0325
Robert J. Warrick, Gerald G. Ellis, Clifford C. Grupke, Amir R. Khamseh, Theodore H. McLachlan, Carrie Gerkits
For the new 4.7 L, V-8 engine, which was introduced in the all new 1999 Jeep Grand Cherokee, Chrysler product engineers found they needed a bedplate material that was significantly stronger and stiffer than gray iron to help meet engine weight requirements. The material also had to provide good NVH characteristics, be cost effective, and machinable. Intermet Corporation, the casting supplier, wanted a material that was significantly tougher than gray iron, would cast sound in complex sections, and which could be reliably produced on a cost effective basis. This paper presents an overview of the development, properties, casting practices, and engine validation of enhanced compacted graphite iron, a material specifically developed and tailored for the bedplate of the new 4.7 liter engine.
1999-03-01
Technical Paper
1999-01-0345
Darryl Taylor, Ekrem Esmen, Jwo Pan, Joseph Crowley
In this paper, an analytical method is proposed for determining the stress distributions in steering knuckle/tapered stud assemblies. The method is based on solutions of the plane stress thick cylinder interference fit problem with modifications to account for the effects of stud taper and dissimilar component materials. The analytical solutions are applied to knuckle/tapered stud assemblies. The results from the analytical solutions are compared to those from a finite element analysis. It is shown that the analytical and FEA results are in good agreement for several load and frictional conditions, and the hoop and radial stress solutions presented in this paper are good engineering solutions to the knuckle/tapered stud problem where the draw distance is provided.
1970-02-01
Technical Paper
700019
A. D. Rosenstein, R. L. LaPado
The development of the first fully molded, plastic, passenger car door trim panel is discussed in this paper. From the initial styling concept, an attempt is made to explain the various factors that lead to the choice of materials and final part overall design. Special consideration of the interaction of part shape and attachment methods is given. There is also a description of the mold and the molding conditions, and the quality control test procedures established to insure quality production. A prediction of concept acceptability is made in the Summary Section. Also, a suggestion for further developments of plastic surface coatings is made.
Viewing 1 to 14 of 14

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