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          • What is a Tolerance Ring?
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      5. Throttle Body Motor Mount

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      Throttle Body Motor Mount

      Automotive Powertrain Throttle Body Motor Mount

      Electric motors are being used to drive an increasing number of devices in motor vehicles. One such application is the use of electric motors within the throttle body to control the butterfly valve, commonly known as ETC (Electronic Throttle Control).

      Engineers are confronted with a number of issues including:

      • Operating temperatures of up to 150°C
      • Tolerances of motor and housing up to 0.8 mm in total
      • Vibration of the engine/movement of the motor
      • Failure of the electrical connections due to vibration
      • Alignment of pinion gear

      RENCOL® Tolerance Ring products, including Crown Rings, Standard Tolerance Rings, and Miniature Tolerance Rings offer multiple solutions in throttle body motor mount applications. 

       

      RENCOL® Tolerance Ring

      • Mounting between dissimilar materials
      • Control of NVH / rattle / play of motor
      • Prevention of premature motor failure
      • Easy to assemble
      • Allows for lighter weight design

       

      RENCOL® Aluclad

      Our Aluclad technology has been specially developed to solve the issue of thermal transfer between mating components. This has become an increasing problem for Emotors and needs to be controlled to help improve the longevity and reliability of the motor. Our page dedicated to the materials used for tolerance rings explains Aluclad in more detail.

      • Benefits
      • Document

       

      RENCOL® Tolerance Ring types and applications

       

      Crown Ring Application

      In many applications, the motor is only fixed at the front and the engine vibration can lead to fatigue failure or stress corrosion of the electrical terminals, as the rear of the motor is not supported.

      The Crown Ring is the latest in a series of cost-effective, problem solving innovations that RENCOL® Tolerance Rings has to offer the automotive engineer. The Crown Ring is a radial spring fastener with several sprung fingers which, while deflected, give a required load. The height and number of sprung fingers is altered specific to each customer requirements to cope with system tolerances, thermal expansion and support of the motor weight. This system combines the benefit of the large diametrical tolerance compensation (in excess of 1 mm is possible) with the additional benefit of low assembly forces.

       

      Standard Tolerance Ring Application

      When engineers are restricted by physical component sizes, other solutions are available. A RENCOL® Tolerance Ring comprising a series of waveforms is used to create an interference fit, securely holding the motor in position. The waveforms and other important criteria, such as ring thickness and hardness are designed with ring specialists and component manufacturers working closely together.

       

      Miniature Tolerance Ring Application

      Where physical space is restricted further, a miniature ring can be used to secure the motor. Here the tolerance ring is located on the bushing/bearing housing. Upon assembly, the tolerance ring is aligned within the rear of the housing generating an interference fit locking the motor in position.

      Visit our Resource Library for related documents.

      About Saint-Gobain

      Saint-Gobain designs, manufactures and distributes materials and solutions which are key ingredients in the wellbeing of each of us and the future of all. They can be found everywhere in our living places and our daily life: in buildings, transportation, infrastructure and in so many industrial applications.

       

      Saint-Gobain Performance Plastics' group of businesses gather solutions to save energy, provide protection, improve comfort and sustain the environment for a variety of markets.

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