Question

The function of engine speed sensor is to monitor engine speed, which is one of the factors used to calculate ............... .

Hint:

Tip: Engine speed sensor → tells ECU when to fire the spark!

Answer 1

The engine speed sensor continuously measures how fast the engine’s crankshaft is rotating.
This data is essential for the engine control unit (ECU) to manage various operations.
One of the main uses of this information is to calculate ignition timing.
Ignition timing determines when the spark plug should fire to ignite the air-fuel mixture inside the combustion chamber.
Precise timing ensures optimal power output, better fuel efficiency, and lower emissions.
If ignition occurs too early or too late, it can cause knocking, power loss, or engine damage.
Valve clearance is adjusted manually, not based on engine speed sensor data.
Oil pressure is monitored by a separate oil pressure sensor.
Therefore, the correct answer is ignition timing.