Otto, Diesel, and Rotary Engine Cycles Arenas Alejandro Julian Thompson Daniel Vertucci Matthew White Otto Engine Few things to remember Invented by Nikolas Augustus Otto in the 1870’s. Also know as the four-stroke engine because of its four-stroke cycle. Internal combustion engine.
There are a few differences between the diesel engine and the gasoline engine.
Diesel fuel is heavier and oilier than regular gasoline and it smells different. Diesel gas
evaporates much more slowly than gasoline because it is heavier. Its chemical compound is
C14H30 as compared to gasoline which is C9H20. It takes less refining to create diesel fuel
which is why it is usually cheaper than gasoline. It has a higher energy density than gasoline.
One gallon of diesel fuel contains 155 million joules of energy compared to 132 million with
gasoline. The fact that diesel fuel has a higher energy density and diesel engines run more
efficiently than gasoline engines creates better mileage when traveling.
The main difference between a gasoline engine and a diesel engine is the spark plug.
The injector has to be able to withstand the temperature and pressure inside the
cylinder and still deliver fuel in a fine mist. The injection process is also different
from gasoline engines. In gasoline engines fuel is injected into the cylinder during
Intake stroke and then compressed. The fuel and air mixture limits the compression
Ratio of the engine. If the air is compressed to much then the fuel spontaneously
Ignites and creates knocking. A diesel compresses air only, so the compression
Ratio can be much higher. The diesel cycle includes 4 stages which are the intake
Of air, compression of air, fuel injection, and then the exhaust stage.
The higher the compression ratio the more horsepower from the engine.
It is the heat of the compressed air that ignites the fuel.
Intake of air
Note: The shaft rotates three times for each
Rotation of the orbit
Biodiesel vehicles are starting to increase in popularity, especially among large fleets of vehicles
Park rangers in Yellowstone National park use biodiesel to decrease pollution from their pickups
Almost any type of diesel engine can be converted to run on biodiesel, like this hummer
Biodiesel can help an engine run better because it acts as solvent
Natural gas is a fossil fuel that is usually found above and below oil deposits
The idea of using natural gas was first developed in the 1930s, but until the invention of the leak-proof pipe transporting gas was difficult