What is the function of the motor on the engine?
4 Answers
The car generator is mainly used to charge the car's battery and provide long-term stable power supply to high-power electrical appliances in the car. The functions of the car generator: The car generator is the main power source of the car. Its function is to supply power to all electrical equipment while charging the battery when the engine is running normally. Based on the three-phase stator winding of an ordinary AC generator, the number of winding turns is increased and lead-out terminals are added, along with an additional set of three-phase bridge rectifier. The working principle of the car generator: When the external circuit energizes the excitation winding through the brushes, a magnetic field is generated, magnetizing the claw poles into N and S poles. When the rotor rotates, the magnetic flux alternates in the stator winding. According to the principle of electromagnetic induction, an alternating induced electromotive force is generated in the three-phase winding of the stator. This is the power generation principle of the AC generator.
I found that the electric motor on the engine actually serves many purposes, with the most crucial one being starting the engine. Every time you turn the key to ignite, the starter motor's pinion gear engages with the flywheel, spinning the engine to life. Additionally, many modern cars are equipped with a 48V mild hybrid system, where the motor can also assist during initial acceleration, making the vehicle more fuel-efficient. In some premium models, the motor can even recover energy during braking to recharge the battery. A while back, when I was repairing my car, I encountered worn-out carbon brushes in the starter motor, which made the engine impossible to start. In the end, I had to spend several hundred dollars to replace the part. If such components aren’t properly maintained, they often fail when you need the car the most.
Bro, honestly, the motor next to the engine is like the car's right-hand man. The starter plays a crucial role—that 'click' sound when you turn the key is it kicking in to crank the engine. New cars are even more impressive now; like my hybrid has a BSG motor. At red lights, the engine shuts down completely, and when starting off, the motor silently glides the car forward, cutting fuel consumption by 15% instantly. But if this thing breaks down, it’s a real pain. Last time I heard from the 4S shop, replacing a start-stop compatible starter costs at least 3,000 yuan.
As a female driver, I find sudden car breakdowns most frustrating. Last month on a rainy day while taking my child to school, the car wouldn't start - just made a 'click-click' sound, leaving me sweating with anxiety. The mechanic later said the starter motor brushes had worn out completely. That moment made me realize how crucial those small components we usually overlook can be. Actually, it's not just responsible for ignition - nowadays many cars use this motor to help engines save fuel too, like the auto start-stop feature that relies on the motor to restart the engine. I'd suggest all my fellow female drivers regularly check the motor's brushes and terminals to avoid embarrassing situations like mine.
