The car starter bendix is mainly used to transfer the power of the starter to the engine flywheel during the car starting process, and to prevent the engine from dragging the starter after the engine starts.
When the car is not started, the starter bendix is in a stationary state. At this time, the drive gear of the bendix is separated from the engine flywheel ring gear. The one-way clutch inside the bendix allows the drive gear to have a certain amount of axial movement space to prepare for subsequent meshing action. When the driver turns the car key or presses the start button, current will pass through the electromagnetic switch of the starter. After the electromagnetic switch is activated, on the one hand, the circuit of the starter motor is connected to start the motor to rotate; on the other hand, electromagnetic force is generated to push the fork or transmission mechanism of the bendix. As the fork moves, the drive gear of the bendix moves axially along the helical spline shaft and approaches the engine flywheel ring gear. Since the starter motor has begun to rotate, the drive gear gradually meshes with the flywheel ring gear while rotating.
This meshing process requires precise control, because if the speed and position of the drive gear and the flywheel ring gear do not match, "tooth hitting" may occur, damaging the gear. In order to ensure smooth meshing, the design and manufacturing precision of the starter one-way device are required to be high, and in some advanced designs, some auxiliary devices are also used to help the gears mesh better. When the drive gear is fully meshed with the flywheel ring gear, the rotational torque of the starter motor is transmitted to the flywheel through the drive gear. The flywheel is connected to the engine crankshaft. Under the action of torque, the crankshaft begins to rotate and the engine piston begins to move, so that the engine enters the working cycle of intake, compression, power, and exhaust, and finally realizes the start of the engine. After the engine starts, its speed will increase rapidly and exceed the speed of the starter. At this time, the one-way clutch inside the one-way device begins to work. The structural characteristics of the one-way clutch determine that it can only transmit torque in one direction.
When the engine speed is higher than the starter speed, the one-way clutch will automatically cut off the reverse transmission of torque, so that the drive gear will return to its original position along the helical spline shaft under the rotation of the engine flywheel and separate from the flywheel ring gear. This prevents the starter from being dragged back when the engine is running at high speed, thus protecting the starter from damage. The one-way device returns to its initial static state and waits for the next start operation.
The one-way device of the automobile starter effectively starts the engine and protects the starter through the cooperation of this ingenious mechanical structure and the one-way clutch. It is a key component in the automobile starting system.
If you have any confusion about Car Starter Bendix , please feel free to communicate with us, we are always on standby!
www.wuxisuperhuman.com
