Browse Topic: Door panels
Door sunshade in a vehicle has proven to be very comfortable and luxurious feature to the customers. Luxury vehicles provide power sunshade which is electrically operated with the activation of a switch, whereas cost conscious vehicles provide manual sunshade which requires manual coiling and uncoiling. This study is to develop a door panel structure that can accommodate both the manual sunshade and power sunshade, thereby serving both cost conscious as well as luxury seeking customers. Manual sunshade consists only of cassette, pull bar, spindle mechanism and hooks whereas the power sunshade consists of cassette, pull bar, spindle mechanism, flap mechanism, bowden cable mechanism, actuator and motor. Due to this difference in package, it becomes difficult to accommodate both variants of sunshade into the same body system. However, this study helps in developing a common body structure by ways of effective packaging, modifying the cable and actuator mechanism and critical packaging of
The recent surge in platforms like YouTube has facilitated greater access to information for consumers, and vehicles are no exception, so consumers are increasingly demanding of the quality of their vehicles. By the way, the door is composed of glass, moldings, and other parts that consumers can touch directly, and because it is a moving part, many quality issues arise. In particular, the door panel is assembled from all of the above-mentioned parts and thereby necessitates a robust structure. Therefore, this study focuses on the structural stiffness of the door inner panel module mounting area because the door module is closely to the glass raising and lowering, which is intrinsically linked to various quality issues.
This document provides information on the various fiberboard products, which are available for automotive application. It is intended to give engineers and designers a better understanding of product usage, characteristics, properties and industry terminology. The following sections cover these topics: 2 General Product Information 3 Design Characteristics 4 Physical/Mechanical Properties 5 Fiberboard Definitions In sections 2, 3 and 4 the fiberboard products are categorized. These sections give an overview of product types, with general information about characteristics and properties. In cases where product categories encompass more than one material or material grade, ranges were established to cover all of the products in that category. The individual companies that supply fiberboard products should be consulted for specific information about a particular product or application.
This study focuses on the sudden shaking phenomenon of a sliding door passing through a corner. This phenomenon requires attention because shaking during movement can lead to a harsh operation feeling and a short service life. An experiment based on a test setup was conducted, and the sudden change in the acceleration of a sliding door panel was measured. Based on multi-body dynamics (MBD) analysis and a rigid-flexible coupled model of the sliding door system, the cause of the sudden shaking was determined to be the discontinuous curvature of the middle rail trajectory. A transition curve was proposed as the solution for the discontinuous curvature, and Euler’s spiral was applied in the redesign of the middle rail trajectory. Verified by simulations, the results exhibit considerable improvement in sliding door movement stability, with large reductions in the maximum center of mass (CM) acceleration and guide roller impact force.
SAE J1717 is an advisory document suggesting minimum recommended testing, appearance evaluation, and protocol for specifying the recommendations with regard to Singular Unassembled Automotive Interior Trim Parts.
Are you innovating for NVH? I'll never forget the experience, as a kid, of lifting the massive steel hood of my father's 1971 Dodge Monaco and seeing nothing but V8 engine and a few rubber hoses. The vast compartment was so uncluttered, I could look straight down and see the pavement. By comparison, the view under today's vehicle hoods reveals a dense landscape of technologies aimed at acoustic control: covers, shields and insulators designed to keep injector clatter, induction honk and even pulley whirl muffled. Supplier innovations are central to winning the ongoing war with NVH-noise, vibration and harshness. The battle started decades ago and will certainly increase in the future. This is an engineering realm with numerous tradeoffs involving total piece cost, capital cost, stranded fixed capital, tooling complexity/count, system optimization, flexibility, intellectual property and even downstream warranty. But because NVH (more accurately, the lack of it) has direct impact on the
A wall-resolving Large Eddy Simulation (LES) has been performed by using up to 40 billion grids with a minimum grid resolution of 0.1 mm for predicting the exterior hydrodynamic pressure fluctuations in the turbulent boundary layers of a test car with simplified geometry. At several sampling points on the car surface, which included a point on the side window, the door panel, and the front fender panel, the computed hydrodynamic pressure fluctuations were compared with those measured by microphones installed on the surface of the car in a wind tunnel, and effects of the grid resolution on the accuracy of the predicted frequency spectra were discussed. The power spectra of the pressure fluctuations computed with 5 billion grid LES agreed reasonably well with those measured in the wind tunnel up to around 2 kHz although they had some discrepancy with the measured ones in the low and middle frequencies. The Dynamic Smagorinsky Model (DSM) was adopted for the subgrid-scale turbulence model
Performing a reconstruction of sideswipe interactions is difficult due to the lack of permanent crush sustained by the vehicles involved. Previous studies have provided insight into the forces involved in creating various types of damage for vehicle-to-vehicle interactions during a sideswipe interaction. However, these data may not be applicable to the interaction that occurs when a tractor-trailer steer tire is involved. As demonstrated in previous studies, steer tire interaction produces a unique pattern of markings on the struck vehicle by the protruding lugs (wheel stud) of the steer tire. These studies have demonstrated that the pattern of cycloidal marks created by the wheel lugs can be used to calculate the relative speeds of the vehicles. While this is helpful in understanding the relative motion of the vehicles, it does not provide information regarding the forces applied at the point of contact. The purpose of this study is to assess the structural response of passenger cars
In recent years it's noticed a considerable growth in vehicles sales, resulting a great gas emissions volume increase and consequently a higher environment impact. Currently Brazilian automotive scenario faces a moment which government and market requires energetic efficiency increase, on the other hand it is challenges the OEM's to develop lighter cars, providing thereby an “environmentally friendly” vehicle. Considering this scenario, natural fibers application in automotive parts has a great contribution, because in a large parts variety it application is possible. This application studies has contributed and earned great highlight in sustainability terms. Natural fibers provides great environmental benefits because it's renewable, biodegradable and require low energy consumption in its manufacturing process, further it's lighter than fiberglass and others conventional fibers. This paper will address the natural fibers importance using in the automotive parts production process
The use of low-density materials in body panels is increasing as a measure to reduce the weight of the vehicle body. Honda has developed an aluminum/steel sheet hybrid door that is more effective in reducing weight than an all-aluminum door. Because aluminum was used in the door skin, bimetallic corrosion at the connection between the aluminum and the steel sheets represented an issue. It was possible that the difference in the electrical potential of the two metals might promote corrosion at the connection between the aluminum door skin and the steel sheet door panel, in particular at the lower edge of the door, where rainwater and other moisture tend to accumulate, with the result that the appeal of the exterior of the door might decline. To address this issue, a watertight structure realized through the use of a high-ductility sealer was employed in order to help prevent water from infiltrating to the connection between the metals, and steel sheets with a zinc-aluminum-magnesium
Automobile manufacturers in the developing nations tend to make more and more fuel efficient cars compared to the luxurious type, given to the popularity. Fuel efficiency has a direct relation with the weight of the vehicle. In order to increase the fuel efficiency, body weight has to be decreased. The weight of all door panels comprises about 15% of body weight of the vehicle. Hence, by reducing the weight of the door panels, fuel efficiency of a vehicle can be increased. But, reduction of the weight of the door panels may lead to decrease in the strength of the panels. Therefore, we need to find a method to increase the fuel efficiency by decreasing the weight and maintaining the strength of the door panels. The aim of our study is to increase the performance while decreasing the weight of the door panel assembly. We have used CAE (Computer aided Engineering) as a tool to study and evaluate the performance of doors, with varying thickness and different shapes like beads. We found
The customer perception about the door slam noise and its feel would indicate the brand image of the car. In this paper the authors have made an effort to improve the door slam noise quality of the vehicle, which is currently in production. This paper describes the probable areas in the door to improve the slam noise quality by attempting modifications in the door design factors, such as door alignments, door panel stiffness, door trims, window glass rattle, latch striker alignment, door seals, air extractor. Since the door closing event is a transient phenomenon, it requires special tools such as wavelet transforms, Zwicker loudness to understand the slam events precisely. Subjective jury evaluations have been conducted to understand the effect of these modifications and rank the modifications based on their contributions to the door slam quality.
A document describes designing, building, testing, and certifying a customized crane (Lifting Device — LD) with a strong back (cradle) to facilitate the installation of long wall panels and short door panels for the GHe phase of the James Webb Space Telescope (JWST).
Unprecedented rates in Boeing 737 aircraft production have driven a need for an increase in capacity in fuselage manufacturing and assembly. This paper will discuss the requirements by Spirit AeroSystems to add capacity, and the new and upgraded machinery provided by Broetje Automation in response to these requirements. Production areas found to require additional capacity included galley and entry door skin fastening, as well as frame fastening in upper and lower lobes. Three new Mobile Panel Assembly Cell (MPAC) machines were installed in rapid succession for efficient and flexible production of door panels. For frame fastening of upper and lower lobes, three existing machines were taken out of production one at a time for a comprehensive upgrade resulting in process speed increases of more than 40%.
This paper presents a new concept for a 100% plastic prototype automotive door panel. This concept has the potential of providing a weight reduction of up to 40% compared to conventional steel door panels, but with equivalent performance (static strength). This innovative technology can be used for a variety of exterior automotive parts. The concept includes a composite sandwich panel combination of GFRP (glass-fiber-reinforced polymer), and LACTIF®, which is expanded beads foam made from PLA (polylactic acid) and developed by JSP Corporation. This GFRP+LACTIF® composite design offers the following characteristics: - Excellent environmental resistance, - Strong adhesion, - Equivalent static strength (versus conventional door panels), and - Design flexibility. This concept also offers an alternative to conventional steel door panel systems by using unsaturated polyester material of plant origin as part of the GFRP composite. Using this combination with PLA would yield a sustainable
Generally, it is difficult to compare the warpage of CAE simulation with which of physical part directly for large, thin-wall injection molded part. The warpage of an injection molded automotive interior door panel was discussed in this paper. The CAE simulation result was obtained via analysis in Autodesk Moldflow software with a reasonable CAE model which was constrained according to the physical measurement, and in the physical measurement, several points' positions were confirmed to make sure that the part was fixed on the gauge correctly and consistently. Finally, the warpage result of CAE simulation showed a good consistency with which was measured with a three-coordinate measuring machine.
The pole side impact test has been mandatory in Euro NCAP since 2009 and it includes, in addition to the head, assessments on other critical body regions that might be affected such as the chest, abdomen and pelvis. This paper describes a new test method for predicting Anthropomorphic Test Device responses to calculate injury index in side impact tests of a rigid pole under Euro NCAP conditions. Simplified sled tests are very effective in reducing the cost and time of development of more advanced side impact safety devices. To accomplish sled tests successfully, it is necessary to reconstruct accurately the combined dynamic deformation behavior of door and seat in pole impact. That behavior varies among different dummy response regions. Conventional sled test methods, published in previous literature, can reconstruct the deformation of the entire door using a single actuator at constant intrusion velocity but actual door velocity isn't constant in full scale vehicle crash tests. The
Before lighter-weight or recycled materials and components can make their way into vehicles, it is essential to understand how they react under the influence of weather. As designers and engineers seek to reduce weight, increase the amount of recycled content, and become more cost-effective, the use of new lightweight materials, composites, and compounds is growing in the automotive industry. Testing to ensure that these new materials meet performance, durability, and regulatory targets plays a key role in helping companies minimize the risk of costly failure at later stages of the development process. To understand how materials and components will react when exposed to the environment over the course of their life cycle, weathering testing has taken on greater significance. Products must be optimized to endure conditions ranging from very dry to wet and humid and from freezing to very hot.
The drive to incorporate renewable resources continues to gain momentum within the automotive industry. FXI has developed a grade of low (1.7 pcf) density slabstock foam which uses a natural oil polyol in place of a petroleum-based polyol. This foam grade, trademarked GreenBlend\St, has been developed specifically to produce foam-fabric/vinyl laminates for automotive seating, and interior trim applications such as headrests, armrests, visors and door panels. This new foam grade satisfies all of the OEM specifications for physical properties, including fogging and flammability, and yields satisfactory bond strengths when flame-laminated to cover stock. It is also s cost competitive technology compared to conventional slabstock foam using petroleum-based polyols.
Extensive wind-tunnel work gave Volt a shape that's slicker than it looks. But engineers aren't happy with the curb weight. Advanced powertrain engineers and eco-enthusiasts argue convincingly that Volt's technology crown jewel is its electrified propulsion system. And they're right. But the car's overall efficiency, and success in the marketplace, also hinges on its aerodynamics, styling, package efficiency, and occupant protection. The body form and construction count as much for electrified vehicles as it does for conventionally powered ones, perhaps even more. Witness Toyota's Prius, whose overall wedge shape and tall greenhouse make it far from a handsome car. But that look struck a major chord with hybrid early adopters and cemented it to the point that Honda paid homage with the current-generation Insight.
This document provides information on the various fiberboard products, which are available for automotive application. It is intended to give engineers and designers a better understanding of product usage, characteristics, properties and industry terminology. The following sections cover these topics: 2 General Product Information 3 Design Characteristics 4 Physical/Mechanical Properties 5 Fiberboard Definitions In sections 2, 3 and 4 the fiberboard products are categorized. These sections give an overview of product types, with general information about characteristics and properties. In cases where product categories encompass more than one material or material grade, ranges were established to cover all of the products in that category. The individual companies that supply fiberboard products should be consulted for specific information about a particular product or application.
The purpose of this SAE Recommended Practice is to present design recommendations for the direction-of-motion of hand controls found in passenger vehicles, multipurpose vehicles, and trucks. These recommendations are based on recent and past human factors research and are important considerations in the design of control layouts.
The important new model from General Motors Europe is based on the Epsilon II architecture expected to underpin many GM models for markets around the world. Flowery language laced with hyperbole is part of the communication philosophy of some European car companies, but the language from General Motors Europe (GME) at the world premiere of their Opel/Vauxhall Insignia was comparatively modest. True, the company spoke at the British International Motor Show of “breathtaking design and leading technology” and “sculptural artistry meets German precision,” but the overall message was a balanced and sensible description of a precisely designed and engineered car. It is certainly a very significant model (built in sedan, hatchback, and wagon forms) not just for GME, but also for the GM business empire as a whole. The Insignia's Epsilon II mechatronic chassis architecture is expected to be the basis of the Saab 9-5's replacement as well as for numerous other models including the Saturn Aura.
SAE J1717 is an advisory document suggesting minimum recommended testing, appearance evaluation, and protocol for specifying the recommendations with regard to Singular Unassembled Automotive Interior Trim Parts.
Chrysler's family haulers feature a new look and more interior flexibility to go with a host of technology upgrades. With a 38% market share currently, Chrysler has no plans to relinquish its leadership in the minivan segment as it introduces the new 2008 Chrysler Town & Country and Dodge Grand Caravan. With 35 new or improved features, including a segment-first six-speed transaxle mated to a new 4.0-L V6 engine, the automaker expects its “family rooms on wheels'’ to again change the shape of the minivan landscape-in some ways quite literally. Designers of the new Town & Country and Grand Caravan attempted to break the ubiquitous “jellybean” design mold, replacing it with crisper shapes inspired by the Chrysler 300 and Dodge Magnum, explained Mark Trostle, Chief Designer, Interior/Exterior Design Studio.
Sensor-linked lighting systems, automatic high-beam control, LED headlights, and brand-identifying cabin lighting are enhancing safety, convenience, and the feel-good factor. Unlikely though it may seem, the automotive industry is taking a cue from movies and the theatre with a new business program: “Lights, camera, action.” As with so much in today's world of wheels, it is electronics that lead the way towards the technology horizon, and vehicle lighting-exterior and interior-is a very significant part of it. With bend lighting and adaptive systems now becoming de rigueur in the premium sector and cascading down to cheaper cars, the link has strengthened between lighting and integrated technologies that complement its efficacy. Now, according to German lighting specialist Hella, those links will be significantly broadened with the combination of lighting and front-facing cameras: Not just infrared night vision systems that are already in production, but innovative CMOS (complementary
Lear will rely more on its expertise in electrical distribution and electronics to help customers enhance vehicle safety and convenience features. Through the 1990s, Lear made a number of acquisitions, beefed up its technical facilities, and strengthened its engineering expertise to position itself as a complete interiors supplier-a major shift from the company's beginnings in seating. A focus on interiors meant putting an additional spotlight on instrument panels, cockpits, doors, overhead systems, flooring, and acoustics. The move beyond being a seating supplier developed as customers, particularly those in North America, started to outsource total interiors. But the business plan started to change when automakers resumed a stance of wanting to “control interiors on a micro-level, and that forced us to take a step back and really re-examine what our core business was,” said Douglas DelGrosso, President and Chief Operating Officer of Lear. The evaluation boiled down to Lear officials
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