Exam 37: Ignition System Fundamentals

While having a discussion, Technician A says that the length of time required for ignition coil primary winding saturation varies with engine speed. At low engine rpm, dwell is longer. Technician B says that at low engine rpm, there is more time between cylinder firings than at high speeds, so dwell time can be shorter. Who is correct?

List five parts of the primary ignition system.

Every spark plug has a specified ____________________ that indicates how fast heat can travel away from the spark plug center electrode into the water jackets in the cylinder head.

When an eight-cylinder engine is running at 3,000 rpm, its ignition coil must do remarkable things. If a single coil is used, its magnetic field must be able to build up and collapse 200 times in 1 second.

While having a discussion, Technician A says that a Hall-effect signal generates an AC signal. Technician B says that it does not generate a signal. Rather its signal is a rise in voltage, followed by a drop in voltage. Who is correct?

When there are fewer coils in the primary part of a transformer, it is a step-down transformer .

A(n) ____ vacuum is used to sense the load on an engine.

What is the difference between a magnetoresistive (MR) sensor and a Hall sensor?

Spark plugs often have an internal resistor that lowers the firing voltage output of the coil.

The sensor that MOST-Likely uses a beam of light to control the primary circuit is the:

Photoelectric sensors used for automotive engines are called ____________________ sensors because they actually sense two things.

____________________ time depends on the amount of current flowing in the primary winding.

Which of the following is LEAST-Likely a type of sensor?

The sensor that will MOST-Likely determine the speed of the engine and the position of the crankshaft is the:

____________________ is the length of time that current is flowing in the coil primary winding.

What is the advantage of a CKP sensor with more than one trigger?

All of the following statements are true EXCEPT:

Fouling means that the spark plug gets covered with material, and a spark will not easily jump its gap.

The length of the threaded area of a spark plug is called its ____.

Distributor ignition (DI) systems have a distributor that includes a cog that triggers an electronic coil.