Description

INGCO S-GENS-SM-WR6105ZDI, Weifang Starter Motor(S-GENS-SM-WR6105ZDI)

product details:

A starter motor, also known as a cranking motor or self-starter, is an electric motor responsible for initiating the rotation of an internal combustion engine in order to start it. Here’s a detailed description of its function and components:

Function:

• The starter motor bridges the gap between the low-current ignition switch and the high-current needed by the engine to crank. It essentially acts as a powerful electric relay.

Components:

• Electric Motor: The core of the starter motor, typically a direct current (DC) electric motor with high torque output to overcome the engine’s compression.
• Solenoid (on most models): An electromagnetic device that functions as an intermediary between the ignition switch and the starter motor itself. See Starter Solenoid Switch: here for a detailed explanation of its operation.
• Pinion Gear: A smaller gear attached to the starter motor shaft that meshes with the engine’s flywheel ring gear.
• Drive Mechanism (on some models): A mechanical linkage that engages the pinion gear with the flywheel ring gear when the starter is activated. This linkage might be part of the solenoid or a separate mechanism.

Operation:

1. Ignition Switch Activated: Turning the ignition key to the “Start” position completes the circuit to the starter solenoid (if present).
2. Solenoid Activation (if present): Electricity flows through the solenoid coil, creating a magnetic field that pulls in a plunger.
3. High-Current Circuit Engagement (if present): The solenoid plunger movement connects high-current contacts within the solenoid, completing the circuit between the battery and the starter motor.
4. Starter Motor Operation: With a direct connection to the battery, the starter motor receives the necessary high current to begin rotating the pinion gear.
5. Engine Cranking: The pinion gear meshes with the flywheel ring gear, cranking the engine and attempting to start it.
6. Engine Starts: Once the engine starts and reaches a sufficient RPM, a signal (often from the alternator) disrupts the circuit to the solenoid coil (if present).
7. Solenoid Deactivation (if present): Without the magnetic field, the solenoid plunger returns to its original position, breaking the connection between the battery and starter motor. This disengages the starter motor, preventing over-cranking.
   • On some models without a solenoid, a mechanical linkage operated by the starter drive itself disengages the starter gear from the flywheel when engine RPM increases.