Planetary Gearset (Ravigneaux): Notes

Based on the Ravigneaux design, the A5S 360R planetary gearset is made up of two sections; front & rear. It functions as a single integral assembly with a common planetary carrier and a set of common long planetary gears. See Fig 1 . It consists of the following components:

• Two separate ring gears.
• Two separate input sun gears (one front, one rear).
• One set of three long planetary gears common to both sections (front-rear).
• One set of three short planetary gears (rear).
• One set of three short planetary gears (front).
• One common planetary carrier. See Fig 2 and Fig 3 .
  Fig 1: Identifying Planetary Gearset "Input-Reaction-Output" Chart

  Courtesy of BMW OF NORTH AMERICA, INC.
  Fig 2: Identifying Planetary Gearset (1 Of 2)

  Courtesy of BMW OF NORTH AMERICA, INC.
  Fig 3: Identifying Planetary Gearset (2 Of 2)

  Courtesy of BMW OF NORTH AMERICA, INC.