Question

The ratio of the number of teeth on an engine ring gear to the number on the starter pinion is usually between ____:1 and ____:1.

Answer 1

The correct answer regarding the ratio of teeth on an engine ring gear to the number on the starter pinion is between 3.5:1 and 4.5:1,

Step-by-step explanation:

The correct answer is option 3.5:1 and 4.5:1. This range is standard for most automotive applications involving the gear ratio between the engine ring gear and the starter pinion.

Essentially, for every 3.5 to 4.5 turns of the ring gear, the starter pinion will turn once. This ratio allows for an effective and efficient transfer of mechanical power from the starter to the engine.

The ratio is chosen to provide the required torque multiplication necessary to start the engine. If the ratio is too high, the starter motor might not turn the engine slowly to ensure proper lubrication before it starts. If it's too low, the starter motor might not have enough torque to turn the engine over against the compression of the engine cylinders.

The correct answer is option 3:1 and 5:1. The ratio of the number of teeth on an engine ring gear to the number on the starter pinion can vary, but it is typically between these two ratios.