Compression ignition engine, also known as a diesel engine, is spelled /kəmˈprɛʃən ɪɡˈnɪʃən ˈɛndʒɪn/. The word "compression" is pronounced as /kəmˈprɛʃən/ with stress on the second syllable and the "s" sound in the middle. "Ignition" is pronounced as /ɪɡˈnɪʃən/ with stress on the second syllable and the "g" sound in the middle. "Engine" is pronounced as /ˈɛndʒɪn/ with stress on the first syllable and the "g" sound at the end. The spelling of this word is important to ensure clear communication in the engineering and automotive industries.
A compression ignition engine, also known as a diesel engine, is a type of internal combustion engine in which the fuel ignites spontaneously due to the high temperature resulting from compressing the air-fuel mixture. Unlike spark ignition engines, compression ignition engines do not require a spark plug to initiate combustion. Instead, they rely on the high compression ratio of the air-fuel mixture to increase the temperature to a point where the fuel ignites.
Compression ignition engines are well-known for their efficiency and power output. They operate by drawing in air into the combustion chamber during the intake stroke. The air is then compressed during the compression stroke, resulting in a drastic increase in temperature. At the top of the compression stroke, fuel is injected directly into the combustion chamber, and due to the high temperature, it combusts spontaneously.
The energy generated from the combustion process is converted into mechanical work, which is used to power the engine and drive the vehicle or machinery in which it is installed. Compression ignition engines are commonly used in a wide range of applications such as cars, trucks, boats, ships, generators, and construction equipment, primarily because of their efficiency, durability, and ability to produce high torque. However, they also produce more noise and emissions compared to spark ignition engines, and require specific maintenance and fuel considerations.