Electronic Ignition System Quiz

Which of the following is a key component of an electronic ignition system?

• Ignition coil

• Carburettor

• Fuel injector

• Distributor (sometimes, but not always in modern systems)

In a typical electronic ignition system, the low tension (LT) circuit includes:

• Battery, ignition switch, and electronic trigger device.

• Spark plugs, ignition coil, and distributor cap.

• Fuel injectors, fuel pump, and ECU.

• Intake manifold, air filter, and throttle body.

The high tension (HT) circuit in an electronic ignition system includes:

• Ignition coil, spark plugs, and ignition leads.

• Battery, ignition switch, and electronic trigger device.

• Fuel injectors, fuel pump, and ECU.

• Intake manifold, air filter, and throttle body.

What is the function of the ignition coil?

• To step up the voltage from the battery to create a spark at the spark plugs.

• To distribute the spark to the correct cylinder.

• To control the timing of the spark.

• To measure the amount of air entering the engine.

What is the role of the electronic trigger device (e.g., inductive pick-up, Hall effect sensor)?

• To signal the ECU or amplifier when to fire the spark.

• To distribute the high voltage to the spark plugs.

• To regulate the fuel pressure.

• To measure the engine temperature.

What is the purpose of the spark plugs?

• To create a spark in the combustion chamber to ignite the air/fuel mixture.

• To inject fuel into the cylinders.

• To exhaust gases from the cylinders.

• To cool the engine.

What does the term 'dwell angle' or 'dwell time' refer to?

• The period during which the ignition coil is building up its magnetic field.

• The timing of the spark.

• The gap between the spark plug electrodes.

• The duration of the spark.

What does 'ignition timing' refer to?

• The point in the engine's cycle at which the spark occurs.

• The voltage of the spark.

• The gap of the spark plugs.

• The duration of the spark.

'Advance' in ignition timing means:

• The spark occurs earlier in the engine's cycle.

• The spark occurs later in the engine's cycle.

• The spark is stronger.

• The spark is weaker.

Why is ignition timing advance important during acceleration?

• It allows more time for the fuel to burn completely at higher engine speeds.

• It reduces emissions.

• It improves fuel economy.

• It cools the engine.