The formula to calculate the Alternator Pulley Ratio is:
\[ APR = \frac{CPD}{APD} \]
Where:
The Alternator Pulley Ratio (APR) is a measure of the ratio between the crankshaft pulley diameter and the alternator pulley diameter. It is used to determine the speed at which the alternator operates relative to the engine speed. A higher ratio means the alternator spins faster, which can be beneficial for charging the battery at lower engine speeds.
Let's assume the following values:
Using the formula:
\[ APR = \frac{6}{2} = 3 \text{ in/in} \]
The Alternator Pulley Ratio (APR) is 3 in/in.
