– Why do rpm meters on cars never go down to 0 when stopped?

Question

The only time I’ve ever really seen it happen is on cars that have auto stop/start, which essentially turn themselves off anyway.
Edit: Thanks for the answers everyone! I, in fact, did not know to begin with that it is called the tachometer and measured the revolutions of the engine and not the tires!

In: 5

Answer 1

There’s an encoder on the motor measuring its revolutions. When the car is parked, stopped or in neutral the transmission disengages the motor from the wheels but the motor continues to turn.