Jump to content
Sign in to follow this  
  • entries
    28
  • comments
    33
  • views
    1,291

The Handy Dandy Internal Combustion Engine

Sign in to follow this  
etracey99

75 views

Today, the internal combustion engine is a very important part of the average person's life. We experience the wonder of this engine in most automobiles that use gasoline as a fuel. As one could guess, the Internal Combustion Engine is an engine in which combustion occurs internally... just kidding! (oversimplification at its finest). In all seriousness, let us discuss the four-stroke internal combustion engine since it is not too difficult to understand!

It is called a four-stroke engine because there are four 'strokes' per combustion cycle (up, down, up, down). It goes like this:

The first stroke is for the intake. The intake valve opens as the piston goes into its down position and lets in an oxygen-gasoline mixture (known as the fuel-air mixture). Going back to another post I wrote, the fuel-air mixture can be tuned for better gas mileage and/or power!

The second stroke is to compress the fuel-air mixture in the combustion chamber. While the piston is on its way up, the intake valve quickly shuts and an airtight situation is created, which allows for the compression.

The third stroke, or the combustion stroke, occurs directly as the piston is reaching the top of the chamber. The fuel-air mixture, in its extremely compressed state, is extremely flammable and when the spark plug goes off, explodes! This creates a great force and shoots the piston down.

The fourth and final stroke is to push the exhaust out. As the piston is on its way back up, the exhaust valve is opened, and the air that is created after the explosion is let out so fresh air can be let in.

After this, the cycle repeats itself! I found a diagram from keveney.com that I believe will help to imagine what it all means:

4 stroke

This process is the origin of how your car actually moves! The combustion pushes the pistons, which turn the crankshaft, which turns gears in the transmission, which turns the drive shaft, which turns the differential, which turns the axles which turns your wheels! A lot of steps, but very useful to know!

 

Sign in to follow this  


0 Comments


Recommended Comments

There are no comments to display.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

Terms of Use

The pages of APlusPhysics.com, Physics in Action podcasts, and other online media at this site are made available as a service to physics students, instructors, and others. Their use is encouraged and is free of charge. Teachers who wish to use materials either in a classroom demonstration format or as part of an interactive activity/lesson are granted permission (and encouraged) to do so. Linking to information on this site is allowed and encouraged, but content from APlusPhysics may not be made available elsewhere on the Internet without the author's written permission.

Copyright Notice

APlusPhysics.com, Silly Beagle Productions and Physics In Action materials are copyright protected and the author restricts their use to online usage through a live internet connection. Any downloading of files to other storage devices (hard drives, web servers, school servers, CDs, etc.) with the exception of Physics In Action podcast episodes is prohibited. The use of images, text and animations in other projects (including non-profit endeavors) is also prohibited. Requests for permission to use such material on other projects may be submitted in writing to info@aplusphysics.com. Licensing of the content of APlusPhysics.com for other uses may be considered in the future.

×