Preview

Diesel Fuel Injection

Good Essays
Open Document
Open Document
908 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Diesel Fuel Injection
Inside this Article

Diesel Fuel Injection

One big difference between a diesel engine and a gas engine is in the injection process. Most car engines use port injection or a carburetor. A port injection system injects fuel just prior to the intake stroke (outside the cylinder). A carburetor mixes air and fuel long before the air enters the cylinder. In a car engine, therefore, all of the fuel is loaded into the cylinder during the intake stroke and then compressed. The compression of the fuel/air mixture limits the compression ratio of the engine -- if it compresses the air too much, the fuel/air mixture spontaneously ignites and causes knocking. Because it causes excessive heat, knocking can damage the engine.
Diesel engines use direct fuel injection -- the diesel fuel is injected directly into the cylinder.
The injector on a diesel engine is its most complex component and has been the subject of a great deal of experimentation -- in any particular engine, it may be located in a variety of places. The injector has to be able to withstand the temperature and pressure inside the cylinder and still deliver the fuel in a fine mist. Getting the mist circulated in the cylinder so that it is evenly distributed is also a problem, so some diesel engines employ special induction valves, pre-combustion chambers or other devices to swirl the air in the combustion chamber or otherwise improve the ignition and combustion process.
|[pic] |
|Photo courtesy DaimlerChrysler |
|Atego six-cylinder diesel engine |

Some diesel engines contain a glow plug. When a diesel engine is cold, the compression process may not raise the air to a high enough temperature to ignite the fuel. The glow plug is an electrically heated wire (think of the hot wires you see in a toaster) that heats the

You May Also Find These Documents Helpful

  • Good Essays

    (Vegetable oil) + (Alcohol) → (Glycerol) +(Methyl Ester)On the other hand, diesel is made from the petroleum which takes millions of years to form under the earth. Thus, it is a kind of nonrenewable energy source. Same as diesel fuels, biodiesel can generate the engine through combustion process. The cloud point of biodiesel is 13°C whereas the cloud point of diesel fuels is -15°C (Hafman, 2003). Both biodiesel and diesel fuel are liquid in room temperature.…

    • 1019 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Diesel Mechanic Essay

    • 290 Words
    • 2 Pages

    A diesel mechanic is a special type of mechanic that has a decent salary. Becoming a Diesel Mechanic is a great idea because of the decent salary and the days you have off.…

    • 290 Words
    • 2 Pages
    Good Essays
  • Satisfactory Essays

    Chapter 6 Railroads Quiz

    • 263 Words
    • 2 Pages

    A diesel engine drives a generator/alternator which in turn drives electric traction motors that turn the wheels.…

    • 263 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    Rudolph Diesel invented the diesel engine in the late 1800s. Though Rudolph was the inventor, it was Clessie Cummins, a native of Indiana, who was widely known for inventions that improved the diesel engine. In 1911, Clessie Cummins helped improve the speed of a diesel engine that went on to win the Indianapolis 500 race. Working as a chauffeur and mechanic for William Irwin Miller, Clessie had the vision to start a company. William Irwin Miller was a banker and successful investor, who strongly supported Clessie and provided the financial backing for the company’s launch. Thus, in 1919, Clessie Cummins founded Cummins Engine Company. Cummins was one of the first companies to take advantage of the innovative technology that Rudolph Diesel had developed. The company was founded in Columbus, Indiana, which remains the headquarters today. William Irwin Miller’s great-nephew, J. Irwin Miller, took a leadership role within the company and led the company through a period of significant growth. The growth included international expansion, profitability, and innovation. J. Irwin Miller’s visionary leadership, coupled with Clessie’s passion for quality and reliability, propelled Cummins’ to grow at a rapid pace (“Cummins History”, 2016).…

    • 681 Words
    • 3 Pages
    Good Essays
  • Better Essays

    Complexity is reduced in a diesel engine as there is no ignition system but this is not a total advantage as they can be noisy and may require frequent maintenance intervals when compared to a petrol engine.…

    • 1904 Words
    • 8 Pages
    Better Essays
  • Good Essays

    Diesel vs Gas

    • 651 Words
    • 3 Pages

    The way the gas and diesel engines start are a major difference in the two. Gas engines use spark plugs to ignite the fuel. Diesels do not have spark plugs, they use compression. A gasoline engine intakes a mixture of gas and air, compresses it and ignites the mixture with a spark from the spark plug. A diesel engine takes in just air, compresses it, and then injects fuel into the compressed air. The heat of the compressed air lights the fuel. Both modern engines use Electronic Fuel Injection to inject fuel into the cylinders.…

    • 651 Words
    • 3 Pages
    Good Essays
  • Better Essays

    The diesel engine has provided the world with cheap and efficient power for over one hundred years. The invention was first thought up by Rudolph Diesel in 1892. He wanted to create an engine that would be more efficient than the steam engine, which was only 12% efficient. He filed for a patent in Germany in February of 1892. He was granted a patent for a “Working Method and Design for Combustion Engines...new efficient, thermal engine” (History). With his patent ready, he made contracts with large companies such as Frederick Krupp and other manufacturers. Diesel created his first working engine a year later, which ran on peanut oil. That was the fuel that Diesel thought would be overall the most efficient and cost effective, it was the first bio-diesel. The engine ran at 26% efficiency, which was 14% efficient more than the steam engine, almost double. However, Diesel did not think it was enough, so he went back to the drawing board. Later in 1987, he made another model that operated at a whopping 75% efficiency (History). This was an incredible achievement because it meant that it could replace the work that steam engines do at a fraction of the cost. Nowadays diesel engine manufacturers are in competition with gasoline engine manufacturers. Diesels are making comeback to the industry because they are quieter, lighter, more efficient, less polluting and more powerful than ever. Many companies recently have been releasing cars that have ridiculously high MPG's and more power than their gasoline counterparts. The people in the United States like the idea of a fuel efficient car, but get turned off when they hear the idea of a diesel car because of their reputation of being loud and stinky. People need to be reeducated because these…

    • 1947 Words
    • 6 Pages
    Better Essays
  • Good Essays

    7. Choose the type of gasoline recommended for your car. Cars most commonly use Super Unleaded, while larger trucks may use diesel. It is very important to use the correct type of gasoline in your vehicle to avoid any damage to your engine. If you have questions as to what gas to put in your car please read your car’s manual.…

    • 540 Words
    • 3 Pages
    Good Essays
  • Good Essays

    Diesel Mechanics

    • 1123 Words
    • 5 Pages

    A Diesel engine is an engine that starts itself by compression. These engines first started in America. The first diesel engine was invented in 1892. In 1930 they started putting the diesel motors in vehicles. During the Post War Boom, construction started forming the highway system in 1956.…

    • 1123 Words
    • 5 Pages
    Good Essays
  • Good Essays

    Dodge vs Chevy

    • 860 Words
    • 4 Pages

    marked the first time a genuine medium-duty diesel engine had been used in a light-duty truck as…

    • 860 Words
    • 4 Pages
    Good Essays
  • Powerful Essays

    A diesel engine (also known as a compression-ignition engine and sometimes capitalized as Diesel engine) is an internal combustion engine that uses the heat of compression to initiate ignition to burn the fuel, which is injected into the combustion chamber. This is in contrast to spark-ignition engines such as a petrol engine (gasoline engine) or gas engine (using a gaseous fuel as opposed to gasoline), which uses a spark plug to ignite an air-fuel mixture. The engine was developed by Rudolf Diesel in 1893.…

    • 12130 Words
    • 49 Pages
    Powerful Essays
  • Good Essays

    Older engines make use of a mechanical fuel pump and valve assembly which is driven by the engine crankshaft, usually via the timing belt or chain. These engines use simple injectors which are basically very precise spring-loaded valves which will open and close at a specific fuel pressure. The pump assembly consists of a pump which pressurizes the fuel, and a disc-shaped valve which rotates at half crankshaft speed. The valve has a single aperture to the pressurized fuel on one side, and one aperture for each injector on the other. As the engine turns the valve discs will line up and deliver a burst of pressurized fuel to the injector at the cylinder about to enter its power stroke. The injector valve is forced open by the fuel pressure and the diesel is injected until the valve rotates out of alignment and the fuel pressure to that injector is cut off. Engine speed is controlled by a third disc, which rotates only a few degrees and is controlled by the throttle lever. This disc alters the width of the aperture through which the fuel passes, and therefore how long the injectors are held open before the fuel supply is cut, controlling the amount of fuel injected.…

    • 960 Words
    • 4 Pages
    Good Essays
  • Powerful Essays

    Diesel’s hydrocarbon group is usually C12H23; however, the group can range from C10H20 to C15H28. In fact, diesel contains sulfur and releases it with solid carbon particles when it is burned. Unfortunately, the emission of these two elements can cause acid rain in the future. Despite this, diesel is less volatile than gasoline and easier to produce from fractional distillation, making it cheaper as well. Diesel also makes up for its harmful emissions by being more efficient when it comes to producing power. This is solidified by the fact that gasoline can only produce 34.2 mega joules per liter and diesel produces 35.8 mega joules per liter . Also, gasoline engines require more gas at low speeds than diesel engines, so less diesel is needed. Another unique trait it holds is that it burns at about 200 degrees Celsius. Of course, the biggest difference is how it is used in the engine. Unlike gasoline, diesel is used through compression and not by being sparked. It begins with air entering the chamber through a valve and making the piston moving down. Next, the chamber closes off the valves, while diesel is sprayed into the chamber and then is compressed. Because of the compression, the air mixture explodes and moves the piston back down. Another valve then opens to release the excess gas from the combustion and the piston moves back up. Like the gasoline engine, the piston is connected to the…

    • 1226 Words
    • 5 Pages
    Powerful Essays
  • Powerful Essays

    Diesel Fuel

    • 3515 Words
    • 15 Pages

    key, and often overlooked, component in the world of reliable diesel engines is the stuff that actually makes the engines run. Along with a good supply of cool air, diesel fuel is an important component of the total diesel propulsion equation. Back in 1876, in Pico Canyon, California, primitive stills were used to boil crude oil at a prodigious rate of 25–40 barrels a day. By way of comparison, in the U.S. today we consume approximately 18.8 million barrels of oil daily. Despite this enormous increase in production and use, distillate oil is still the same complex, organic compound it was back in 1876. Active compounds, distillate fuels are still subject to aging, degradation, and contamination. So despite the technological advances in engine and application technology, diesel fuel remains one of the weak links in overall system reliability. Just what is diesel fuel, and where does it come from?…

    • 3515 Words
    • 15 Pages
    Powerful Essays
  • Powerful Essays

    tata motors

    • 13666 Words
    • 55 Pages

    An automobile or motor car is a wheeled motor vehicle for transporting passengers; which also carries its own engine or motor. Most definitions of the term specify automobiles are designed to run primarily on roads, to have . seating for one to eight people, to typically have four wheels, and to be constructed principally for the transport of people rather than goods.…

    • 13666 Words
    • 55 Pages
    Powerful Essays