Engines can be classified according to the type of fuel used. What are the two types?
- Liquid fuel
- Gaseous fuel
This classification is based on the fuel that powers the engine.
Engines can be classified according to the method of fuel mixing. Name the two methods.
- Carburetion
- Fuel injection
Carburetion includes carburetor engines and engines with multipoint fuel injection, while fuel injection includes diesel engines and gasoline engines with direct fuel injection.
Engines can be classified according to the way the working cycle is performed. What are the two types?
- Four-stroke
- Two-stroke
This classification refers to the number of strokes needed to complete a cycle in the engine.
Engines can be classified according to the method of ignition of the gas-air mixture. What are the two methods?
- Forced ignition
- Self-ignition
Forced ignition is achieved through electrical discharge, while self-ignition occurs from compression.
Engines can be classified according to the method of filling the cylinder. What are the two methods?
- Atmospheric (naturally aspirated)
- Charging
Atmospheric filling allows air to enter the cylinder through suction, while charging involves air entering with excess pressure.
Engines can be classified according to the number of cylinders. What is the range of cylinders an engine may include?
- From 1 to 12
- Up to 16 cylinders
This classification indicates the number of cylinders present in the engine design.
Engines can be classified according to the arrangement of cylinders. Name the types.
- In-line
- V-type
- VR-type
- W-type
- Opposed
The opposed arrangement has a camber angle of 180° between the cylinders.
Engines can be classified according to the cooling method. What are the two methods?
- Liquid cooling
- Air cooling
This classification refers to how the engine dissipates heat during operation.
