ANIMASI CARA KERJA SISTEM PENGAPIAN CDI MOTOR

Summary

This video explains the principles and operation of the Capacitor Discharge Ignition (CDI) system, commonly used in vehicles. The CDI system works by storing electrical energy in a capacitor, which is then released to generate a high voltage that ignites the spark plug. Key components include the CDI unit, ignition coil, SCR (Silicon-Controlled Rectifier), and the pickup coil. The video covers the process step-by-step, from generating AC voltage to triggering the SCR and producing the spark. Understanding these components and their roles is crucial for troubleshooting CDI system failures.

Takeaways

• 😀 The CDI (Capacitor Discharge Ignition) system works by utilizing the discharge of a capacitor to trigger the ignition process.
• 😀 Both AC and DC systems use the same basic principle in CDI systems.
• 😀 The CDI unit generates high voltage, which is then sent to the ignition coil to convert it into a higher voltage for sparking the spark plug.
• 😀 The ignition coil produces AC voltage to charge the capacitor, which is later transformed into DC voltage by a diode.
• 😀 The pickup coil generates AC current to trigger the ignition system, controlling the timing of the spark.
• 😀 The SCR (Silicon Controlled Rectifier) activates when it receives a trigger signal, allowing electrical current to flow and cause the capacitor to discharge.
• 😀 The ignition system is controlled by an ignition timing control, which uses signals from the pickup coil to manage spark timing.
• 😀 The ignition coil has both primary and secondary windings that work together to step up voltage to create a spark at the spark plug.
• 😀 When the rotor of the motor turns, it causes the ignition coil to generate AC voltage, which is converted to DC and stored in the capacitor.
• 😀 The spark occurs when the SCR is triggered, and the capacitor discharges its stored energy, resulting in a high voltage spark at the spark plug.

Q & A

What does 'CDI' stand for in the context of this ignition system?

CDI stands for Capacitor Discharge Ignition, which is an ignition system that utilizes a capacitor to discharge its stored energy to generate a high voltage spark at the spark plug.

What is the role of the CDI in the ignition system?

The CDI's role is to generate a high voltage by discharging the energy stored in its capacitor, which is then transferred to the ignition coil to create a spark at the spark plug.

What does the ignition coil do in the CDI system?

The ignition coil in the CDI system steps up the voltage generated by the CDI to a much higher voltage, typically around 20 kilovolts, which is necessary to create a spark at the spark plug.

How does the CDI system generate high voltage for the spark plug?

The CDI system generates high voltage through the discharge of a capacitor. This discharge occurs after the energy is triggered by the SCR, causing the ignition coil to produce the necessary high voltage.

What is the function of the pick-up coil in the CDI system?

The pick-up coil generates an AC signal that serves as a trigger to activate the SCR (Silicon Controlled Rectifier), which then controls the release of energy from the capacitor.

What is the role of the SCR in the CDI ignition system?

The SCR controls the flow of current in the CDI system. Once triggered by the pick-up coil, the SCR allows the discharge of the capacitor, which leads to the generation of a high voltage spark.

How does the SCR get triggered in the CDI system?

The SCR is triggered when the pick-up coil generates an AC signal, which is then converted into a trigger signal that activates the SCR, allowing the capacitor to discharge.

What happens after the SCR is triggered in the CDI system?

Once the SCR is triggered, it enables the capacitor to release its stored energy, which is then transferred to the primary coil of the ignition coil. This results in the induction of a high voltage in the secondary coil, leading to a spark at the spark plug.

How does the timing control work in the CDI system?

The timing control in the CDI system manages the ignition timing by adjusting the point at which the pick-up coil triggers the SCR. This ensures the spark occurs at the correct time for optimal engine performance.

What is the significance of the voltage generated by the ignition coil in the CDI system?

The voltage generated by the ignition coil is critical because it needs to be high enough (around 20 kilovolts or more) to create a spark at the spark plug, which ignites the air-fuel mixture in the engine's combustion chamber.