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Water Avoidance Design Strategy for Capacitive Exterior Handles

Huf Hülsbeck & Fürst-Pedro Dias, Michel Turbiani
Ford Motor Company-Douglas Demori, Júlio Magalhães, Anderson Ferreira, Filipe Camargo, Bruno Freitas
  • Technical Paper
  • 2019-36-0187
Published 2020-01-13 by SAE International in United States
Nowadays, capacitive handles are increasing their use in high-end commercial vehicles. This particular handle applies a technology that permits to unlock and even lock the vehicle without a key. As benefit for current life, the customer has the possibility to access and close the vehicles more efficiently and faster, just possessing the key in the pocket or any close compartment that the user is carrying, for example, bag, purse, backpack. Even though, the design of capacitive exterior handle must follow several design strategies to avoid nonfunctional in rainy climate. Water could work as a blocker for the sensor signal captured, special design strategies that must be taken in order to minimize that the liquid could ingress the handle and even be retained on the region that sensor is located. On this two-piece handle not only the parting line location, drain holes and a favorable drainage for liquids inside the handle must be designed, but also a control on the painting capacitance is hugely important for a successful project. Overall, to validate physically the design, test…
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Ignition Switch Material Definition to Avoid Hard to Start Issue

Huf Hülsbeck & Fürst-Michel Turbiani
Ford Motor Company-Júlio Magalhães, Douglas Demori, Rosiane Viegas, Bruno Freitas
  • Technical Paper
  • 2019-36-0138
Published 2020-01-13 by SAE International in United States
Nowadays, develop and launch a new product in the market is hard to every company. When we talk about a launch new vehicle to the customers, this task could be considered more difficult than other products whether imagine how fast the technology should be integrated to vehicle. There are main pillars to be considered in this scenario: low cost, design, innovation, competitiveness and safety. Whereas Brazilian economic scenario, all OEM has to be aware to opportunity to make the product profitable and keep acceptable quality. This combination between low cost and quality could be broken or not distributed equally between the pillars. Based on that, in some cases could have a quality broken that will affect directly the customer. This paper will focus on project to define of the new ignition switch, when the main challenge to achieve the cost reduction target was defined to change a material to electrical terminals. Beyond the material definition, we will discuss about the validation in component level and VOW, quality indicators (internal and external), prevent reoccurrences actions and…
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Design guidelines to avoid hygroscopic effects on outer handles

Huf Hülsbeck & Fürst-Pedro Dias
Ford Motor Company-Douglas Demori, Bruno Freitas, Helano Santos
Published 2018-09-03 by SAE International in United States
Generally, exterior handles are one of the first parts that the user has physical interaction in the vehicle. A robust handle concept gives the user the idea of trust and good quality vehicle as first impression. Exterior handles, in which the concept is a handle body operated by applying a horizontal pull force, always pivoted in the front end and sliding against a reinforcement rail at rear end, are called strap handles. The kinetics seems to be simple, nevertheless special attention must be given regarding the interaction materials used in this system. Various plastic materials used in this system are subjected to water absorption at molecular level, changing their internal structure, resulting in swell and consequently a volume increase. This phenomenon that modifies the dimensions is known as hygroscopic expansion. In one hand, handles must present reduced wobble and free play. Although, it must be remembered that hygroscopic phenomenon may be associated with cases of handle jamming, where the handle presents higher resistance to be operated or simply do not return to home position, configuring…
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