Types of Engines and Their Differences

A vehicle like a car, bus and truck are not like human bodies, they don’t have a brain like us they cannot move like us. We know that an object can not move until it gets some external force on it. According to Newton’s first law of motion.

The same is with the car or truck until they get the external force they will not move from their position. An engine helps to move a vehicle from the rest of the place. The engine is a part of the vehicle that converts chemical energy into mechanical energy, where chemical stands for fuel like diesel, gasoline, and gasoline. The engine is also known as the heart of an automobile. 

In humans, one person can not live without a heart, in the same way, without an engine car or truck can not run one-centimeter.

Have you ever gone to buy a remanufactured engine, used engine or a new engine in the market? Has this question ever raised in your mind how does this engine work and how many types of it?

If you answered yes and want to know about the engines, we welcome you. Here we will discuss the types of engines and their differences.

Kinds of Engines

There are two types of automobile engines.

  1. External Combustion Engine
  2. Internal Combustion Engine

External Combustion Engine

It is an engine in which fuel combustion is outside the cylinder is known as an external combustion engine. In this engine, the burning of fuel causes heat to be used to convert water and other liquids into steam. This high-pressure steam is used to transform rotational energy in these engines all types of fuels can uses.

Internal Combustion Engine

It is an engine in which the combustion of the fuel process happens inside the cylinder. When the fuel engine burns inside the cylinder, it produces high temperature and pressure. When this high-pressure vehicle is mounted on the piston, the wheel of the vehicle starts turning.

Models of Internal Combustion Engine

  1. Two Stroke Engine
  2. Four Stroke Engine

In a two-stroke engine, a piston rotates up and down at the interior side of the cylinder and complete the crankshaft revolution during a one time of the fuel injection. Where in the four-stroke engine, the piston moves up and down twice inside the cylinder and clears the two crankshaft revolution at a single burning fuel time.

Differences between them

  1. In two-stroke engines has no oil ring while the four-stroke engine has oil rings because in two-stroke engine petrol and lubricant oil is used that’s why the two-stroke engine doesn’t need oil ring.
  2. The four-stroke engine has an intake and exhaust valve, while the two-stroke engine does not need this.
  3. The two-stroke engine has a small flywheel (a mechanical device that is used to store rotational energy in engines) because of its works in stable mode.
  4. Two-stroke engines have additional transfer port while the four-stroke engines have not.
  5. Due to fewer components, the two-stroke engine has lightweight than the four-stroke engine.
  6. In four-stroke engine has lubricant oil in the crankcase, while in a two-stroke engine crankcase contains petrol and lubricant both because of premix lubrication.
  7. Power stroke per single revolution of the crankshaft in two-stroke, while power stroke per two revolutions of the crankshaft.
  8. The two-stroke engine has a more power-weight ratio, where the four-stroke engine has less ratio.
  9. The two-stroke engines have low fuel efficiency per kilometer (mileage) where four-stroke engines have more fuel efficiency per kilometer. In simple words, we can say that two-stroke engines take less fuel than the four-stroke engine.
  10. In the two-stroke engine, fresh charge always mix with the exhaust gas wherein four-stroke engines because of separate stroke it does not occur.
  11. Because of its construction, two-stroke engines produce more noise than the four-stroke engine.  
  12. Two-stroke engines have less thermal efficiency. In four-stroke, they have more thermal efficiency.
  13. Four-stroke engines have more friction than two strokes engine because it has more components.
  14. Two-stroke engines have a low capital(because of oil+fuel) cost than four-stroke engines (because of only fuel).
  15. Two-stroke engines have fewer maintenance costs than the four-stroke engines because of fewer components.

So these were the types, and differences between the engines. Next time when you go to the market to purchase the used engines or new engine or remanufactured engine. You can easily your problem, what to buy two-stroke or four-stroke.

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