Fundamentals of the Four Stroke Internal Combustion Engine Many people claimed the invention of the internal combustion engine in the 1860's, but only one has the patent on the four stroke operating sequence. In 1867, Nikolaus August Otto, a German engineer, developed the four stroke "Otto" cycle, which is widely used in transportation even today. Otto developed the four-stroke internal combustion engine when he was 34 years old. The Diesel Engine came about in 1892 by another German engineer, Rudolph Diesel. The Diesel engine is designed heavier and more powerful than gasoline engines and utilizes oil as fuel. Diesel engines are a commonly used in heavy machinery, locomotives, ships, and some automobiles. It is important to mention that the basic operating principles of these engines have been around for more than a hundred years and they are still in place. Some people get discouraged when they look under the hood and cannot recognize a thing on their automobile. Rest assured that underneath all of those wires and sensors lies an engine with the same basic operating principles of that "Otto" engine over a century old. Before explaining the different strokes, I would like to explain the basic parts of the Internal Combustion Engine. The Intake Valve opens at a precise time to allow the air/fuel mixture to enter the cylinder. The Exhaust Valve opens at a precise time to allow the burned gases to leave the cylinder, The Spark Plug ignites the air/fuel mixture in the cylinder, which creates an explosion. The force of the explosion is transferred to the Piston. The piston travels up and down in a Reciprocation Motion. The force from the piston is then transferred to the Crankshaft through the Piston Rod (connecting rod). The piston rod converts the reciprocating motion of the piston, to the Rotating Motion of the crankshaft. Now that the basic parts are identified, lets go through the four strokes of the internal combustion engine, which are Intake, Compression, Power, and Exhaust. On the intake stroke, the intake valve has opened. The piston is moving down, and a mixture of air and vaporized fuel is being pushed by atmospheric pressure into the cylinder through the intake valve port. After the piston reaches the lower limit of its travel, it begins to move upward. As this happens, the intake valve closes.
There are many internal parts to the injector. Starts with a barrel then moves down to a plunger then there is a check valve, below that is a spacer with the nozzle springs inside of it, lastly is the nozzle. All of these parts have specific and unique jobs. Nozzle has a needle in it that works kind of like a piston that once the pressure build up the needle forces forward and sprays fuel. There is a spacer above the nozzle with the nozzle springs that force the needle down. Above the spacer is a check valve, the check valve allows the right amount of fuel into the nozzle. The plunger and barrel are located above the check valve. It has a spring on the plunger that has to hold resistance of the pressure until it reaches the correct amount before it will let the injector fires. There is two internal o-rings one that is around the plunger and one that sets between the nut and body.
The diesel engine was granted patent in 1898 and after that it spread around the world in the nineteen hundreds.
Insert the key, turn, and vroom. And down the road you go. Most people take for granted the strange conglomeration of metal and plastic under that sheet of metal either in front or back of their vehicle. The engine as you may have guessed, is modern marvel- so to speak. They’re found in cars, trucks, boats, airplanes…All with various power outputs.
After the steam engine was created in the early 17th century, many people and companies tried to take that same technology and apply it to automobiles. Nobody was successful until a British inventor by the name of Richard Trevithick created a multi passenger automobile that ran on a power source that was driven by a steam-propelled piston at high pressure (Bellis). Up until the mid 1900’s cars were only produced by specifically skilled blacksmiths, and were very expensive. There were only about 4,000 cars produced from the 1890’s to mid 1900’s (Bellis).
Cummins has a history of innovation beginning in 1919 when it was founded and produced its first diesel engine, a 1.5 to 8 horsepower model used to power pumps. In 1929, a Cummins engine powered the first diesel-powered U.S car. The company continued to advance in the diesel engine and power generation industry, and in 1958 Cummins Filtration was started to meet the high-performance requirements of Cummins diesel engines (Cummins Inc.). In 1985, Cummins introduced aerodynamic contours to Class 8 trucks years ahead of its time. This new shape greatly reduced air flow drag and, combined with a lightweight engine, attained up to 20 percent higher fuel efficiency than similar vehicles at the time. In 1999, Beijing Public Transit launched a fleet of 300 buses with Cummins B5.9 engines to improve city air quality, being the first clean, alternative fuel fleet in Asia and remains the largest in the world, with more than 3500 Cummins Westport natural gas powered buses (Cummins Inc.). These are just a few examples demonstrating a history marked by improvement and innovation of new technologies in order to reduce emissions and increase efficiencies for the benefit of the environment.
Starting in the late 1700's, European engineers began tinkering with motor powered vehicles. Steam, combustion, and electrical motors had all been attempted by the mid 1800's. By the 1900's, it was uncertain which type of engine would power the automobile. At first, the electric car was the most popular, but at the time a battery did not exist that would allow a car to move with much speed or over a long distance. Even though some of the earlier speed records were set by electric cars, they did not stay in production past the first decade of the 20th century. The steam-driven automobile lasted into 1920's. However, the price on steam powered engines, either to build or maintain was incomparable to the gas powered engines. Not only was the price a problem, but the risk of a boiler explosion also kept the steam engine from becoming popular. The combustion engine continually beat out the competition, and the early American automobile pioneers like Ransom E. Olds and Henry Ford built reliable combustion engines, rejecting the ideas of steam or electrical power from the start.
Starting in the late 1700’s, European engineers began messing with motor powered vehicles. By the mid 1800’s, steam, combustion, and electrical motors had all been attempted. By the 1900’s it wasn’t very clear on which type of engine would really power the automobile. At that time, electric cars were the most popular but there were no batteries at that time that would allow a car to move very fast or a long distance. Commercial production in the United States began at the beginning of the 1900’s. In the early 1900’s, the United States had about two thousand firms producing one or more cars.
This hot gas is pushed out through the back and it makes the rocket move forward. This is using Newton's third law of
Many by now know, the EV that redefined the genre was released to rave reviews. Consumer Reports said that it performed better than any other auto on their test track. Because of all the weight from the low mounted motors it was
Since the development of the steam engine people had been interested in creating self-powered vehicles, this manifested during the industrial revolution as the train. However, as time went on people became interested in creating a vehicle that wasn’t confined to tracks. The earliest attempts were moderately successful but served little practical purpose. Automobiles first began to truly spread with the invention of the electric motor which created cheaper, more powerful, and safer automobiles. Still the automobile still had numerous problems and were mainly in the hands of the rich. It was the development of the internal combustion engine and the assembly line that was truly able to create a practical vehicle that could be used by all and propelled the automobile into the heart of American culture and made it one of the most significant inventions of the post-industrial revolution era, resulting in a complete revolution of society.
The diesel engines combustion process is a little different than the typical gasoline engine. A couple main things that diesel engines have that gasoline engines do not are, carburetors and spark plugs. Unlike a gasoline engine, air is first allowed into the cylinder rather than a fuel and air mixture. Once the air is compressed it creates a source of heat, then a mist of fuel is injected to start the combustion process which then creates the energy. Since diesel engines do not have spark plugs they are able to take in larger amount of fuel, this obviously means there will be more power and will guarantee better efficiency. Another thing that is very important is that diesel tends to be a better lubricant than gasoline, being that it is a better lubricant there will be less friction which will generally increase the life of the engine (Woodford). Diesel engines operate at slower speeds than gasoline engines, therefore diesel engines tend to have longer lifespans than gasoline
In this report I will explain the fuel systems in an automobile. I will cover different parts and how they work. First thing to do is explain how the fuel system works. The purpose of the fuel system is to store and supply fuel to the cylinder chamber where it can be mixed with air then vaporized and burned to produce energy. The fuel, which can be either gas or diesel is stored in a fuel tank. A fuel pump draws the fuel from the gas tank through lines and brings it through a fuel filter. Next it goes to either a carburetor or fuel injector and then delivered to the cylinder chamber for combustion.
Firstly, the gas turbine engine operation begins with the air intake process. As of all internal combustion engine, oxygen is required to support the combustion of the fuel and the source of oxygen is from the fresh air that is taken in. Initially, the fan is rotated by a driving shaft that is powered by the turbine of the engine. A negative or vacuum pressure at the intake side is then created by the rotating fan. Next, the surrounding air is drawn towards the inlet and causes it to flow into the gas turbine engine inlet (Cengel & Boles, 2011). At the same time, the pressure on the other side of the fan is increased as it is compressed at a lower pressure ratio and causes the air in the outlet side of the fan to move fu...
The American Society of Mechanical Engineers (1992) Steam Engine Collection. International Mechanical Engineering Heritage Collection. Retrieved 2012 at http://files.asme.org/ASMEORG/Communities/History/Landmarks/5605.pdf
Diesel engines are an important component of society in how they are used efficiently and effectively. Diesel engines have been around since 1892 when inventor Rudolph Diesel was able to achieve his goal of developing an internal combustion engine that can achieve maximum efficiency as seen in the Carnot Theorem. The Carnot Theorem set the standard for determining the maximum