How the starter works

2025-10-17

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Power supply: When starting, the power supply (usually the vehicle's battery) provides current to the starter through the starting circuit.

Power supply: When starting, the power supply (usually the vehicle's battery) provides current to the starter through the starting circuit.

Motor operation: The starter contains a motor inside, and when the current passes through the motor, it begins to rotate.

Gear transmission: When the motor rotates, the power of the motor is transmitted to the crankshaft of the engine through the gear transmission device (such as reduction gear).

Crankshaft rotation: Rotating power makes the crankshaft of the engine start to rotate, driving components such as pistons and valves to move.

Ignition and combustion: As the crankshaft rotates, gasoline or diesel fuel enters the engine combustion chamber for ignition and combustion.

Self-sustaining operation: Once the engine is successfully started and continuously operated, the starter will automatically disengage the engine and stop the power supply.

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Common faults and maintenance of car starters

The motor does not start Possible reasons: insufficient battery power, poor circuit connection, electromagnetic switch failure, internal damage to the motor, etc. Troubleshooting methods: check battery voltage, circuit connections, electromagnetic switch coil resistance, and disassemble the motor if necessary.

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