What is the function of the circuit breaker?

1 Answers
VanIsabel
07/30/25 9:15am
The function of the circuit breaker is to periodically open and close the primary circuit to induce high voltage in the secondary circuit. The circuit breaker is an important component of the battery ignition system, consisting of: cam, contact pair, capacitor, and ignition advance device. Its working principle is: the opening and closing of the contacts cut off or connect the primary circuit of the ignition coil, inducing high voltage in the secondary circuit of the ignition coil due to electromagnetic induction. The secondary high voltage is distributed to each cylinder of the engine through the distributor to ignite the air-fuel mixture. The circuit breaker contacts are made of tungsten alloy, with one contact being a fixed contact and the other being a movable contact. The grounding of the fixed contact is achieved by fixing the movable base plate and the lower fixed base plate with fixing screws, and the contact gap can be adjusted by rotating the eccentric screw.
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