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Question

Difficulty: EasyIgnition System

In a traditional automotive ignition system, which component rotates inside the distributor cap to deliver high-voltage electricity to each spark plug in the correct firing order?

  1. A
    Alternator
  2. Distributor rotorAnswer
  3. C
    Fuel injector
  4. D
    Intake valve

Answer

Distributor rotor
In a conventional distributor-type ignition system, the distributor rotor is turned by the engine's camshaft. As it spins within the distributor cap, it receives high-voltage current from the central ignition coil lead and sweeps past individual contact points, distributing spark to the appropriate spark plug in accordance with the engine firing order.

Step-by-Step Solution

1
Identify the primary function described in the scenario
The component must physically rotate within the distributor cap to distribute secondary high voltage to spark plugs in a timed sequence.
Conventional distributor systems use a mechanical switching device timed to the camshaft to route spark energy to each cylinder.
2
Match the function to the correct automotive component
The distributor rotor sits beneath the distributor cap on the distributor shaft and sweeps across terminal contacts leading to each spark plug wire.
The rotor serves as the rotating bridge that channels coil voltage to the respective cylinder.

Key Concept

High-voltage spark distribution in distributor-based ignition systems
Estimated Time:45s
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Topics

Ignition System

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