Introduction The world of internal combustion engines is divided into two main categories: Spark Ignition (SI) engines and Compression Ignition (CI) engines. These two powerhouses have distinct characteristics that define their operation, performance, and applications. In this article, we delve into the core differences between SI and CI engines, shedding light on their mechanisms, fuel types, emissions control, and their roles in shaping modern transportation. The Ignition Conundrum: SI vs. CI At the heart of the distinction between SI and CI engines lies the method of ignition. SI engines employ spark plugs to ignite an air-fuel mixture, while CI engines rely on the high temperature and pressure of compressed air to ignite fuel without the need for a spark. Igniting … Continue reading Difference Between SI engine and CI engine