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What are the differences of internal combustion and gasoline engine?

Internal combustion engine (ICE) and gasoline engine are both types of engines that convert the chemical energy of fuel into mechanical energy, but they have some key differences.

Fuel:

- ICE: ICEs can run on a variety of fuels, including gasoline, diesel, natural gas, or even alternative fuels like biofuels or hydrogen.

- Gasoline engine: Gasoline engines are specifically designed to run on gasoline, which is a mixture of hydrocarbons derived from crude oil.

Compression ratio:

- ICE: ICEs have a higher compression ratio compared to gasoline engines, which means that the air-fuel mixture is compressed to a smaller volume before combustion.

- Gasoline engine: Gasoline engines typically have a lower compression ratio to prevent engine knocking, which is a condition that occurs when the air-fuel mixture ignites prematurely.

Spark plugs:

- ICE: ICEs can have either spark plugs or fuel injectors to initiate combustion.

- Gasoline engine: Gasoline engines use spark plugs to create an electric spark that ignites the air-fuel mixture.

Fuel injection:

- ICE: ICEs can have either port fuel injection or direct fuel injection.

- Gasoline engine: Gasoline engines typically use port fuel injection, where the fuel is injected into the intake manifold before entering the combustion chamber.

Emissions:

- ICEs emit various pollutants such as carbon monoxide, nitrogen oxides, particulate matter, and unburned hydrocarbons. However, modern ICEs are equipped with emission control systems to reduce these emissions.

- Gasoline engines also produce emissions similar to ICEs, and they are subject to emission regulations to minimize their environmental impact.