SS Connection

My project based learning project has to deal with the topic of compression ignition. The project consists of placing a cotton ball into a tube while exerting enough force on it, without the use of external heat, to produce fire. In relation to social studies, many cars use a compression ignition engine rather than a spark engine. The difference between the two is that a compression ignition use pistons and valve openings to produce combustion while a spark plug use electricity. People use vehicles every day, therefore this relates to social studies because it has to deal with a resource that has impacted our lives on an enormous level.

On this page I will be discussing just how compression ignitions play a part in the diesel engines and how diesel engines are more effective than gasoline engines.

Engines that use a compression igniter are more commonly known as diesel engines. According to HowStuffWorks, the compression igniter of diesel engines "draw in a charge of air, compress it to increase its pressure and temperature, and then spray in diesel fuel" and differ from gasoline engines which use spark plugs. The goal of both engine are the same: to convert chemical energy (fuel) into mechanical energy (work/movement) in order to keep a car running. The only thing is that diesel engines get the job done more efficiently.

Diesel engines last longer, are better for the environment, and are safer than a gasoline engine. According to Cars.com, diesel engines are "are less prone to wear than gasoline engines". This can benefit many individuals in the long run. The longer something lasts, means the less money that people have to spend on repairs and replacements. Cars.com also shares that "diesel cars can easily approach the fuel economy of a hybrid without mileage-boosting devices such as auto shut-off systems and low rolling resistance tires". This means that people can have the luxury of owning a diesel-like engine without the disadvantages that come with owning a full package hybrid. Lastly, Cars.com give an example on how diesel engines are safer by explaining that the fuel used in diesel engines only "ignite under severe pressure and/or very high temperatures". Having an engine that is less likely to blow up in one's face is a sure must have as it prevents injuries and catastrophes.

Websites referenced:

1) http://cars.about.com/od/dieselvehicles/a/What_is_diesel.htm

2) http://auto.howstuffworks.com/diesel-two-stroke1.htm