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Analysis of common faults of automobile mufflers

(Summary description)Through disassembly and careful inspection, it was finally found that the copper glue line from the contact arm of the circuit breaker to the low-voltage terminal was broken at the corner, and only a few thin copper wires were left to connect.

Analysis of common faults of automobile mufflers

(Summary description)Through disassembly and careful inspection, it was finally found that the copper glue line from the contact arm of the circuit breaker to the low-voltage terminal was broken at the corner, and only a few thin copper wires were left to connect.

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Stop and check the distributor section again. Through disassembly and careful inspection, it was finally found that the copper glue line from the contact arm of the circuit breaker to the low-voltage terminal was broken at the corner, and only a few thin copper wires were left to connect. After replacing the broken copper glue line, the failure phenomenon disappeared.
Failure analysis: When the copper wire of the low-voltage wire of the distributor is broken, the cross-sectional area of the wire decreases, which increases the resistance of the primary circuit and reduces the current in the circuit, resulting in insufficient high voltage generated by the ignition coil. When the engine temperature is low, although it is difficult to start, the engine can run normally after starting. After the temperature of the engine rises, the temperature of the ignition coil increases, and the resistance increases with the rise of the temperature, so the high-voltage electricity generated by the ignition coil will be more insufficient, the high-voltage spark will be weaker, and even the fire will be broken. Due to the fire from time to time, the unignited combustible mixture in the cylinder is discharged into the muffler. When it expands in the muffler, it will detonate when it encounters sparks in the exhaust gas, which is manifested as the muffler blasting.
 

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