Machine-translated by Google. Questions are authored in English.
Top

Discussion

Which ratio does a starter pinion to ring gear typically give?

  • A.Around three to one, which is sufficient to turn the engine at the speed required for starting to occur
  • B.One to one
  • C.Around fifty to one, which is required in order to develop the torque needed to turn a cold engine over
  • D.Around fifteen to one

Answer: D

A small pinion driving a large ring gear gives roughly fifteen to one, so the motor spins around three thousand revolutions per minute to crank at two hundred. Additional internal reduction raises the total further on geared starters. Naming the cost of a choice alongside its benefit is what turns a fact into a design decision. Working the distinction through on a single concrete case fixes it more firmly than any rule of thumb.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.