Fungsi Vital CDI Pada Tiap Motor

Summary

This video explains the importance and functioning of the CDI (Capacitor Discharge Ignition) system in motorcycles. It describes how the CDI system generates the necessary spark for ignition by stepping up voltage through components like the ignition coil, capacitor, and puls igniter. The process involves precise timing controlled by a rotor and solenoid, ensuring the air-fuel mixture in the engine ignites at the correct moment. The CDI system is preferred over older ignition systems due to its durability, electronic components, and lower maintenance needs, making it a vital feature in modern motorcycles.

Takeaways

• 😀 The spark plug is essential for igniting the air-fuel mixture in the engine, and without it, the engine won't start.
• 😀 CDI (Capacitor Discharge Ignition) is a vital system that generates the electrical spark needed to ignite the air-fuel mixture in the engine.
• 😀 The spark produced by the CDI is not a flame, but an electrical discharge similar to lightning, which has the ability to burn the air-fuel mixture.
• 😀 The spark plug works by creating a spark between its electrodes, with one connected to the battery's positive terminal and the other to the ground.
• 😀 A voltage increase from 12V to around 10,000V is necessary to create a spark at the spark plug, achieved by the ignition coil.
• 😀 The ignition coil acts as a step-up transformer, increasing the voltage to generate the necessary spark.
• 😀 CDI uses a capacitor to store electrical energy, which is released to trigger the spark at the correct time.
• 😀 Paus Igniter and SCR control the timing of when the electrical charge is released from the capacitor to generate the spark.
• 😀 The rotor in the ignition system sends a signal to the SCR to disconnect the battery from the capacitor, causing it to discharge.
• 😀 The CDI system is more efficient, durable, and requires less maintenance than older ignition systems like the platina, as it has no mechanical parts.

Q & A

What is the role of the spark plug in a motorcycle engine?

The spark plug generates a spark that ignites the compressed air-fuel mixture inside the engine, which is necessary for the engine to start and run.

Why is the CDI system important in a motorcycle?

The CDI system is vital because it controls the ignition timing, ensuring that the spark plug produces the spark at the correct moment to ignite the air-fuel mixture, allowing the engine to operate.

What does CDI stand for and how does it work?

CDI stands for Capacitor Discharge Ignition. It uses a capacitor to store and release electrical energy, which then triggers the ignition coil to generate a high voltage spark at the spark plug.

How does the ignition coil function in a motorcycle's ignition system?

The ignition coil acts as a step-up transformer, increasing the battery voltage (12V) to a much higher voltage (10,000V) to create a spark at the spark plug.

What role does the capacitor play in the CDI system?

The capacitor stores electrical energy from the battery and releases it suddenly when the circuit is broken, allowing the ignition coil to generate the necessary high voltage for the spark plug.

How does the CDI unit improve the efficiency of the ignition system?

The CDI unit limits the voltage in the ignition coil's primary winding to around 100V, reducing the size of the ignition coil and improving electrical efficiency in the engine's ignition system.

What is the purpose of the 'puls igniter' in the CDI system?

The 'puls igniter' controls the timing of the spark by sending a signal to the SCR to interrupt the current flowing to the capacitor, which triggers the capacitor to discharge and ignite the spark plug at the right moment.

How does the SCR work in the CDI system?

The SCR (Silicon-Controlled Rectifier) acts as a switch that opens and closes to control the current flow from the battery to the capacitor. It ensures that the capacitor discharges at the right moment to create a spark.

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

The rotor, connected to the engine's crankshaft, spins to trigger the solenoid, which sends a signal to the SCR to cut off the current to the capacitor, allowing it to discharge and generate a spark.

Why is the CDI system preferred over the older platina system?

The CDI system is more durable because it uses no mechanical components that wear out from friction, unlike the platina system, which requires regular maintenance and is less efficient.