Automotive Starter Motor Gearing
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Questions and Answers

What type of reduction gearing is commonly used in high-torque, lightweight starter motors?

  • Spur gearset
  • Worm gearset
  • Crown and pinion gearset
  • Planetary gearset (correct)
  • What is a characteristic of the gearset used in a Delco-Remy 39 MT starter motor?

  • Compact and lightweight (correct)
  • Heavy and bulky
  • High-speed and low-torque
  • Low-ratio and high-slippage
  • What is the primary purpose of reduction gearing in a starter motor?

  • To decrease the torque of the motor
  • To increase the speed of the motor
  • To reduce the weight of the motor
  • To transform high-speed, low-torque into low-speed, high-torque (correct)
  • What is NOT a characteristic of a planetary gearset?

    <p>High-speed and low-torque</p> Signup and view all the answers

    What is an advantage of using a planetary gearset in a starter motor?

    <p>Compact design and high power-to-weight ratio</p> Signup and view all the answers

    Study Notes

    Starter Motor Gear Reduction

    • In high-torque, lightweight starter motors, such as the Delco-Remy 39 MT, a specific type of gear reduction is used.
    • The correct type of reduction gearing is a planetary gearset.
    • Planetary gearset is used to achieve high torque and light weight in starter motors.

    Other Options

    • Crown and pinion gearset is not used in high-torque, lightweight starter motors like Delco-Remy 39 MT.
    • Aluminum gear teeth is not a type of gear reduction.
    • Viscous drive is not a type of gear reduction used in starter motors.

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    Description

    This quiz is about the type of reduction gearing used in a high-torque, lightweight starter motor, such as a Delco-Remy 39 MT. Identify the correct gearset from the options.

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