iDSI System

iDSI – What is Intelligent-Dual Sequential Ignition system by Honda?

What is the iDSI system by Honda?

The term iDSI stands for the Intelligent-Dual Sequential Ignition system. Honda developed this system to reduce the emissions and improve the efficiency.

For – Improved combustion & better fuel efficiency. By – Honda City.

The i-DSI or 'Intelligent -Dual Sequential Ignition' system is a type of ignition system designed & developed by Honda for its petrol engine cars. The i-DSI system consists of two spark plugs for each engine cylinder. The Honda engineers placed them diagonally opposed to each other at the top of each cylinder. Furthermore, the system directly controls each spark plug for independent ignition timing through eight separate ignition coils.



iDSI - Intelligent-Dual Sequential Ignition
iDSI - Intelligent-Dual Sequential Ignition system diagram

How does the iDSI System work?

In addition, the i-DSI provides two separate sparks at a different time in the combustion process. The first spark ignites the air-fuel mixture, just like the conventional ignition. Furthermore, the second spark fires slightly later and ignites any remaining fuel in the cylinder. The i-DSI system also comprises the swirl port which helps to optimize the air-fuel mixture.

In conclusion, this process helps the engine to maximize fuel efficiency and also achieve lower levels of exhaust emissions. However, Honda engineers designed the i-DSI engines to deliver better fuel efficiency over performance.

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