Examkin

Question

Difficulty: MediumIgnition System

An automotive ignition system relies on distinct mechanical, electrical, and solid-state devices working together to generate and distribute high-voltage spark. Match each ignition system component with its correct operational function.

  • Ignition Control Module (ICM)Rapidly switches the primary coil ground circuit on and off to collapse the magnetic field and induce high secondary voltage.
  • Crankshaft Position (CKP) SensorMonitors engine rotational speed and piston travel to supply fundamental timing and reference pulses to the engine computer.
  • Distributor RotorSpins inside the distributor cap to mechanically direct high-voltage surges from the coil to individual spark plug terminals.
  • Spark Plug Ground ElectrodeProvides the grounded terminal across which high secondary voltage arcs to ignite the compressed air-fuel mixture.

Answer

Ignition Control Module pairs with switching the primary coil circuit; Crankshaft Position Sensor pairs with monitoring rotational speed and position; Distributor Rotor pairs with mechanically directing secondary voltage; Spark Plug Ground Electrode pairs with providing the grounded terminal for the spark arc.
Each pair correctly matches an ignition system part with its core operational principle: the Ignition Control Module switches the primary coil ground to induce high voltage, the Crankshaft Position Sensor feeds critical rotational angle data to the control computer, the Distributor Rotor physically channels high-voltage pulses according to cylinder firing order, and the Spark Plug Ground Electrode provides the stationary terminal that forms the spark gap.

Step-by-Step Solution

1
Analyze the primary circuit switching component.
Identify the Ignition Control Module as the solid-state transistor switch that opens and closes the primary winding ground circuit to trigger induction.
Inducing high secondary voltage in the ignition coil requires rapidly collapsing the primary magnetic field.
2
Analyze the engine timing input sensor.
Identify the Crankshaft Position Sensor as the magnetic or Hall-effect pickup that supplies rotational speed and piston position reference data.
The electronic control module requires crankshaft data to determine the exact moment to fire each cylinder.
3
Analyze the high-voltage mechanical distribution element.
Identify the Distributor Rotor as the rotating contact that transfers secondary voltage from the coil center post to the outer cylinder cap terminals.
Conventional distributor systems use a synchronized rotating contact to route spark energy according to the engine firing order.
4
Analyze the combustion chamber spark termination component.
Identify the Spark Plug Ground Electrode as the grounded physical projection that establishes the spark gap alongside the center electrode.
The secondary circuit must complete a path to engine ground to produce the electric arc that ignites the fuel charge.

Key Concept

Ignition System Component Functions and Operating Roles
Estimated Time:1m 15s
Rate this question

Topics

Ignition System

More questions from this topic