SI engine and CI engine difference and its working in automobile.

Working of SI engine and CI engine

Difference between SI and CI engine

Number of engines used in automobile

Automobile is the largest and fastest-growing industry. The word auto comes from of Greek word and mobiles come from the Latin word. Germany is the birthplace of the automobile. The present age is called the age of ‘automobile’ or ‘self-propelled’ vehicles. A vehicle producing power within itself for its propulsion is known as self propelled vehicle.

The first automobile powered by a steam engine was built in France by Nicholas-Joseph Cugnot in 1769-70. Automobile engineering is also called vehicle engineering. One of the most challenging fields in engineering but at the same time it has more growth opportunities worldwide.

Today’s Automobiles mostly work or operate on two types of cycle.

1) Otto cycle (2) Diesel cycle.

In Automobile, Two types of engines are used according to their function base.

Let’s see the Types of engines.

Classifications of Engines

The definition of Functions of the above-described terms.

1) Engine:- In an automobile engine converts chemical energy into mechanical energy.

2) Internal combustion engine:- Internal combustion engine is the type of engine, In this engine Fuel (charge) burns inside the engine it’s called an internal combustion engine. This means you cannot see the how charge burns in the engine. ( SI engine and CI engine comes in I.C. Engine)

3) External Combustion engine:- External combustion engine is the type of engine, In this engine fuel (charge) burns outside so it's called an External combustion engine. This means you can see the burned charge in the engine (the Steam engine comes in an E.C Engine. e.g. an old coal train)

4) Spark Ignition engine: The spark ignition engine comes under I.C. Engine. In this engine spark plug is used. Spark ignition engine petrol, gas (CNG) types of fuel used.

5) Compression ignition engine: - Compression ignition engine also comes under I.C. Engine. In this engine Fuel injector is used instead of the spark plug. Only diesel is used in this type of engine.

6) Steam engine:- Steam engine comes under E.C Engine. In this type of engine, steam is used as fuel to run the vehicle. (Coal, etc. is used as fuel to generate steam.)

How can describe the Spark ignition engine?

The spark ignition engine spark plug is used to generate power. The Spark ignition engine is also called the SI engine. S.I.Engine used for light motor vehicles. Like Scooter, Bike, and Car Etc. Most of all bike, scooter, and car comes under SI engine except a Diesel car.

How can describe the Compression ignition engine?

Compression ignition engines use a fuel injector instead of the spark plug. ( This is the main difference between the S.I engine and a C.I. engine) . C.I. engine used for heavy vehicles. Like buses, trucks, heavy bikes and etc.

Difference between SI engine and CI engine