How Car Engine Works?

Car Engine 77

How Does Car Engine work?


A car engine generates power from the expansion of compressed air in a contained cylinder with the help of fuel, that is why it’s called as an internal combustion engine, before getting into the working let’s see the main parts that are involved in the working of an engine

Car Engine4

First the Crank Shaft

This is the part which converts the linear motion of the piston to a rotational force, next the pistons and the piston rods, the pistons will be pushed down by the expansion of compressed air and turns the crankshaft, and the valves, which controls the flow of air and fuel into cylinders, these valves are driven by the intake camshaft and the exhaust camshaft,


And the camshafts are driven by the crank itself using a timing belt, there will be idler pulleys and a tensioner pulley to hold the belt tight in place, the internal structure of four strokes inline four-cylinder is (Dual Over Head Camshaft) engine which is commonly found in most hatchback and sedan cars, a four-stroke engine should pass through four different strokes to complete one cycle to produce power


They Are:


  • Intake
  • Compression
  • Power
  • Exhaust


The crank to camshaft ratio is 2:1,

Which means it will take two crank revolutions to complete one camshaft revolutions, and the camshafts are designed in a responsive manner to open or close based on the corresponsive strokes of each cylinder, let’s take a look at a single cylinder and see how a four-stroke engine works in detail

READ Also  Top Fastest Cars in the Whole World


((Intake valve open) in order to ignite the air-fuel mixture, a spark plug is used, this will ignite the compressed air-fuel mixture with the help of electrical spark, we will take it down by each stroke, the inlet valve opens and the downward movement of the piston creates suction,


(Air-Fuel mixture in the cylinder) this pulls air-fuel mixture into the cylinder, once the air-fuel mixture is in the cylinder, compression stroke begins compressing the mixture,  The air-fuel mixture is compressed, at this time both inlet and outlet valves stay closed, at the end of the compression stroke, the air-fuel mixture is ignited by the spark

Car Engine

Air expands when fuel explodes, the explosion exerts pressure and pushes the piston down, this is the power stroke which produces power to the crank, at the exhaust stroke, the outlet valves opens and the piston pushes out the burnt gas, the cycle starts again with intakes stroke keeping the engine running and it produces power, for a carburetor engine, the air and fuel are mixed inside the carburetor assembly and fed to the cylinders



In the case of a fuel injected engine, the fuel is injected into the intake manifold or directly into the cylinder since only power stroke produces power, you may wonder how engine turns continuously, well, the answer is in the crank itself, the flywheel and counterweights provide momentum

Like it? Share with your friends!

What's Your Reaction?

Lol Lol
Scary Scary
Omg Omg
Geeky Geeky
Wtf Wtf
Cute Cute
Win Win
Fail Fail
Love Love