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Starters for the Saab 5-Sep

The starter motor is the element responsible for turning on your vehicle's engine. A starter is built to adhere to strict precision standards, according to the functioning of a particular car model. The starter in your Saab 5-Sep is linked to DC or AC supply to generate a spark, which results in the ignition.

How does a starter motor work?

The motor is electric and begins running when you turn the key in the ignition. When the motor activates, it creates suction by turning the engine. Your vehicle's engine contains a flywheel with a ring gear attached. The motor has a corresponding gear, the pinion gear, that connects with a flywheel ring gear. Turning on your car energizes the motor, which then activates the electromagnet in the ignition system. The force pushes out a solenoid, which is connected to the pinion gear. The flywheel and the gear then connect and ignite the starter. With every turn of the engine, air is sucked into the ignition system, and that flow supports fuel combustion in the chamber. When the engine completes the cycle, the motor stops running, causing the electromagnet to halt. The rod retracts, which subsequently disengages the flywheel from the gear.

How much power do you need in a Saab starter?

The amount of power required for a motor to crank up an engine is based on many factors. The vehicle model matters because it determines the number of cylinders in the transmission, the gear train efficiency, and the compression ratio. How fast a motor runs depends on the mechanical load placed on it, meaning the more the power in the motor, the quicker the ignition cycle. Increasing torque also makes the motor turn faster. The ratio of the pinion gear to the flywheel will determine how fast a motor will crank up an engine.

How does battery voltage influence starter performance?

The amount of voltage supplied affects the power of the motor. As the motor cranks up the engine, it draws amps from the battery, which is why it must maintain an ample supply of voltage. Battery voltage can drop up to 9 volts as the engine cranks up. A motor ranking at normal speed can draw about 300 amps, but it can go up to 600 amps if the motor is locked in a stall position. The cold cranking amps rating of the battery will affect its ability to hold the required voltage.

What is the difference between an inertia and pre-engaged motor?

In an inertia motor system, the pinion rotates at high speeds until it connects with the ring gear. The pinion gear then disengages once it achieves firing speed. An inertia starter can generate a spark when the rotating pinion meets with the stationary ring gear. A pre-engaged gear doesn't create unintentional sparks because the pinion and ring gear engage before the system is at full power. The solenoid energizes and pushes the pinion toward the toothed ring gear before rotation. This mechanism minimizes the risk of disengagement of the pinion and ring gear during cranking. Because this helps avoid over-speeding, a pre-engaged motor may help prevent damage to the gears.

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