What is a Starter Composed of?
2 Answers
A starter generally consists of three parts: a DC motor, a transmission mechanism, and an electromagnetic switch. The motor's torque is transmitted to the flywheel through the transmission mechanism to start the engine. More details are as follows: 1. The DC starter is composed of a DC series motor, a control mechanism, and a clutch mechanism. It is specifically designed to start the engine, requiring a strong torque, thus necessitating a large current flow, reaching hundreds of amperes. 2. Transmission mechanism (engagement mechanism): During engine startup, it engages the starter's drive gear with the flywheel ring gear, transmitting the starter's torque to the engine crankshaft. After the engine starts, it automatically disengages the ring gear. 3. Electromagnetic switch: The control device of the starter, managing the circuit's on-off state. 4. Function of the starter: During startup, it transmits the electromagnetic torque of the motor armature to the engine flywheel to start the engine. After the engine starts, it immediately slips automatically to prevent the engine flywheel from driving the starter to rotate at high speed due to the untimely release of the starter switch, which could cause a "fly-apart" accident of the starter.
The starter mainly consists of several key components: The electric motor is the heart, typically a DC type, containing an armature that rotates inside, while the stator generates the magnetic field. The electromagnetic switch controls the current flow, acting like a master switch; the pinion in the drive mechanism pops out to engage with the engine flywheel, initiating engine startup. The housing encloses all parts, protecting against dust and damage. If the armature coil burns out or the electromagnetic switch fails, the car won't start. I've seen many cars experience issues due to this, so during routine maintenance, check for loose connections to avoid faults caused by corrosion or short circuits, ensuring smooth cold starts.
