Understanding How Your Car Engine Works

Understanding how your car engine works
How Your Car Engine Works

Autogos provides how does a car engine works related brief from experts. About one billion vehicles that are on the road are powered by gasoline. The fundamental concepts of the internal combustion engine haven’t changed significantly in the last 150 years.

A remarkable degree of chemistry is present in our cars. Explore the science behind the four-stroke engine, how attempts to resolve the issue of knocking caused a fatal accident, and why modern vehicles have catalytic converters in their exhaust systems to tackle the toxins that pollute our atmosphere.

How does a Car Engine work?

In general, an engine could be classified into three primary components: the block, the head and the oil sump.

  1. The head of the cylinder:

 The head of the cylinder is the conduit through which fuel can enter the engine chamber and the exhaust gasses leave. The key components of the cylinder head are valves, camshafts and spark plugs.

  1. The Cylinder block

The Cylinder block is the place where all combustion happens. The primary components in this block comprise the chamber for combustion, the piston, and the crankshaft.

  1. The sump for oil

The sump for oil is the bottommost component of an engine. Its primary elements are the oil pan and oil filter.

The Workflow Fundamental

Today’s car engine is a four-stroke engine; that is, it produces good power with just four strokes. Each stroke is described as the piston’s motion from its lowest position (Bottom Dead Centre) to the highest location (top dead center) and vice versa.

The four strokes are Intake Stroke, Compression Stroke and Stroke for Power, and Stroke Exhaust Stroke. This is a diagram of the flow of the steps that take place beginning at the beginning of the cycle until the final stage:

The Engine’s Processes inside the Head

Engine's processes inside the head
Car Engine Works

The combustion process starts at the engine’s head and is triggered by the intake manifold. The intake manifold acts as the conduit through which the mixture of air and fuel is introduced through the combustion chamber.

The air is sucked directly into the manifold via the body of the throttle. The fuel is, however, introduced into the manifold via an injector nozzle, also known as an injector for fuel.

We then move to the tap that controls the release of fuel, also known as the valve. The valve is the device which seals the chamber when it is heated and is opened when the fuel needs to be allowed to flow into the chamber or gases need to be released.

The valves shut and open depending on the stroke occurring. Closing and opening valves are accomplished by an actuator rod, also known as a camshaft.

It is a cylinder rod with protrusions in the shape of drops called cams. When the sharp part of the cam is moving against the valve, it pulls the valve down and opens the port.

As the sharp edge transitions back to the round side, the valve springs pull the valve back to its original position and close the port.

The camshaft’s movement is linked to the rotation of the crankshaft through pulleys and belts. The rotation is controlled by the most precise and delicate timing device that can be set manually.

Processes inside the Engine Block

Now let’s start by tackling the business of a lifetime, i.e. the combustion process. The combustion process happens in the combustion chamber inside the head.

The most crucial component of the process is that it involves the piston. The force of rotation created on the wheels begins by moving the piston.

The piston produces usable power using 4 strokes, or four movements in the direction of its piston, from end to end. Let’s take a look at these four strokes in more detail:

 The Different Types of Engines

  • Thermo engines
  • Internal combustion engines (IC engines)
  • External combustion engines (EC engines)
  • Reaction engines
  • Electrical engines
  • Physical engines

Engines for thermal use

In the broadest sense, the engines need a heat source to convert into motion. Based on the method they use to generate heat, they could be combustion engines (that use burning fuel) or non-combustive.

They work by direct combustion of fuels or by transforming an oil or gas to create work. In this way, most thermal engines also have connections between chemical drive systems. They could be air breathing machines (that use oxidizers, such as oxygen from the air) or non-air breathing ones (that contain oxidizers tied chemically to their fuel).

Internal combustion engines

Internal combustion engines (IC engines) are pretty commonplace today. They power lawnmowers, automobiles, as well as helicopters and more. The largest IC engine could produce 109,000 HP, enough to enable a ship to move around 20,000 containers.

IC engines get their energy from burning fuel inside an area specialised to the combustion chamber. Combustion creates reactions (exhaust) that have a greater volume than the reactants (fuel and the oxidizer).

This is what is the essence of IC engines. This is the reason why they have moved. The heat is merely the result of combustion and is a waste of fuel energy storage as it does not perform any physical work.

External combustion engines

External combustion engines (EC engines) keep the products of exhaust and fuel products separately. They use fuel in a single chamber and then heat the working fluid within the engine via an exchanger or on the wall of the engine. The granddaddy from the Industrial Revolution, the steam engine, is a part of this class.

In a few ways, EC engines function similarly to their IC counterparts, as they both require heat, which is produced by burning substances. However, there are some differences too. 

Reaction engines

Reaction engines, commonly referred to in the field of jet engines, create thrust through the expulsion of the reactionary mass. The principle that drives an engine that reacts is Newton’s Third Law  basically that if you blow anything by putting enough force into the back of the engine, it pushes forward the front part of the engine. Jet engines are highly proficient at this. 

Electric engines

Ah, it’s a clean group. Three kinds of classic electrical engines include piezoelectric, magnetic, and electrostatic.

The one that is magnetic, just like the battery in the same, is the most widely utilised out of the three. It is based on the electrical and magnetic flow interplay to create work. It uses the same principles the dynamo employs to generate electricity; however, in reverse. You can produce a little electricity if you turn a motor by hand.

 What are the basic principles of an Car Engine work?

The spark plug provides the spark that causes the fuel and air mixture’s ignition, allowing combustion to occur.

  • Intake and Exhaust valves are opened at the right time to allow fuel and air and release exhaust
  • Piston
  • Piston Rings
  • Connecting rod
  • Crankshaft
  • Sump