![]() maintenance cost is also an issue in the CI engines. CI engines make more noise and vibration compare to SI engines. More hydrocarbon is produced because of the incomplete combustion, leading to air pollution from the exhaust. More power is produced because of the high compression ratio. This system has a high compression ratio due to the high ignition temperature of diesel fuel. The combustion is accomplished by compressing pure air in the cylinder, which then compressed to a hot temperature so that ignition can occur when the fuel is injected into it. In the system, the spark plug is eliminated because the spark is not needed combustion. ![]() ![]() The CI engines are also internal combustion engines that use diesel fuel to operates on the diesel cycle. It ignites the diesel fuel with compressed hot air. In the combustion process, only air enters into the cylinder during the suction stroke, unlike the SI engine that allows both air and fuel to enter. The compression ignition (CI) engine is a diesel engine used in heavy-duty vehicles, machinery, railways, ships, trucks, and equipment. Read more: Things you need to Know about Automobile Radiators Watch video the learn how a SI engine works: CI engine (compression-ignition engine)
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