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Automotive Technology: A Systems A...

6th Edition
Jack Erjavec + 1 other
ISBN: 9781133612315

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BuyFindarrow_forward

Automotive Technology: A Systems A...

6th Edition
Jack Erjavec + 1 other
ISBN: 9781133612315
Textbook Problem

What happens when the low-voltage current flow in the coil primary winding is interrupted by the switching device?

a. The magnetic field collapses.

b. A high-voltage is induced in the coil secondary winding.

c. Both a and b.

d. Neither a nor b.

To determine

The effect when the low-voltage current flow on the coil primary winding is interrupted by the switching device.

Explanation

When the ignition switch is turned on, a low voltage from the battery is applied to the positive terminal of the coil primary. The current flows from the battery to the ignition switch, ignition coil primary winding, a switching device which can be a PCM or ignition control module and finally back to the battery.

The current flowing through the ignition coil primary creates a magnetic field. As the piston approaches TDC on the compression stroke, the triggering device sends a signal to the switching unit which opens the circuit and stops the current flow...

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