Engine scissor gear assembly

An engine assembly comprising:

• a first rotating engine component;
• a first gear coupled to the first rotating engine component;
• a second rotating engine component;
• and
• a scissor gear assembly coupled to the second rotating engine component and engaged with the first gear to transfer rotation between the first gear and the scissor gear assembly, the scissor gear assembly including:
• a rotationally fixed gear fixed for rotation with the second rotating engine component and having a first number (n) of gear teeth extending from a perimeter thereof;
• a rotatable gear coupled to the second rotating engine component and being rotatable relative to the rotationally fixed gear, the rotatable gear having a second number (m) of gear teeth extending from a perimeter thereof, wherein (m) is greater than (n);
• a friction plate rotationally fixed relative to the second rotating engine component;
• and
• a biasing member having a first end axially fixed relative to the rotationally fixed gear and a second end axially biasing the rotatable gear and the friction plate into engagement with one another.

A method comprising:

• driving rotation of a first rotary engine component having a first gear rotationally fixed thereto;
• driving rotation of a second rotary engine component having a scissor gear assembly coupled thereto, the scissor gear assembly including a rotationally fixed gear fixed for rotation with the second rotary engine component and having a first number (n) of gear teeth extending from a perimeter thereof, a rotatable gear coupled to the second rotary engine component and being rotatable relative to the rotationally fixed gear, the rotatable gear having a second number (m) of gear teeth extending from a perimeter thereof, wherein (m) is greater than (n), a friction plate rotationally fixed relative to the second rotating engine component, and a biasing member having a first end axially fixed relative to the rotationally fixed gear and a second end applying an axial force to the rotatable gear and the friction plate;
• transferring rotation between the first and second rotary engine components via a drive member engaged with the scissor gear assembly;
• and
• maintaining engagement between the drive member and the scissor gear assembly including axially biasing the rotatable gear and the friction plate into engagement with one another, the drive member rotating the rotatable gear relative to the rotationally fixed gear during the driving rotation of the second rotary engine component.