The History and Development of the Common Rail Diesel Engine
To be honest, I don’t really know too much about the history or the functions and operations of a diesel engine, but I am excited about learning more about it through this assignment and when we go to study it in detail during class.
The evolution of Diesel injections actually began from the invention of the gasoline engine. The gasoline engine wasn’t very efficient, even worse than the steam engine. Only around 10% of fuel used in these types of engines actually moved the vehicles, the rest was simply wasted on producing useless heat. A man by the name of Rudolf Diesel was learning about this low efficient engines in Polytechnic High School of Germany and this inspired him to create his own more efficient engine.
Rudolf Diesel was a German inventor and mechanical engineer, renowned for the invention of the diesel engine. He was born in Paris in 1958. In 1983, he published a paper describing an engine with combustion within a cylinder, the internal combustion engine. Rudolf Diesel was almost killed by his engine, when it exploded. However, his engine was the first that proved that fuel could be ignited without a spark. He operated his first working engine n 1897. In 1898, Rudolf Diesel was granted a patent for an “internal combustion engine”, the diesel engine. Diesel engines were being used to power automobiles, trucks, marine craft, factories and many more other things. By 1989, Rudolf Diesel was a millionaire. It is said that Rudolf took his own life on the 29th of September 1913, at the age of 55 years old.
Sir Harry Ricardo was one of the most important engine designers in the early years of the development of the internal combustion engine. He was an English man who was born in London on the 26th of January 1885. He studied at Trinity College and Cambridge. Ricardo invented the diesel pre-combustion chamber that made high-speed diesel engines possible. He also played a key role in researching both tank and aircraft engines around the time of World War 2.
Diesel engines have no spark plugs, they intake air and compress it and then inject the fuel directly into the combustion chamber, this is known as Direct Injection (DI). It’s the heat of the compressed air that actually lights the fuel in a diesel engine. Diesel engines are commonly known to be noisier then petrol; these noises (diesel knock) have been reduced significantly in recent times. Diesel knock is cause by the fuel being injected as the piston is approaching Top Dead Centre (TDC) and before maximum compression has been reached. This therefore means the burning charge is creating pressure and also being compressed at the same time, causing ‘diesel knock’ to occur. Diesel engines in the past were unfavoured by customers of the auto motive industry because of their bad points such a the diesel knock and their over all performance being less then that of a petrol engine. However in recent times, in the current economic climate we are in today, people have become more aware of the benefits they get by buying a diesel engine. They get way better fuel economy from them and there has been vast improvements made on the engine performance and fuel cleanliness. Turbocharged diesel engines are one of the most sufficient engines available at present. Diesel engines are a lot better for the environment as they only emit small amounts of emissions such as carbon dioxide, carbon monoxide and hydrocarbons, which all cause global warming.
The common rail system of fuel injection was used in the Marine diesel engines during the early and mid 19th Century. The common rail system delivers a more controlled quantity of atomized fuel, which leads to better fuel economy; reductions in exhaust emissions and a significant decrease in engine noise during operation. The common rail system of...
References: Textbooks:- Hillier 's Fundamentals of Motor Vehicle Technology, 1st Edition, United Kingdom, Nelson Thornes Ltd.
Malcolm James Nunney, Light and heavy vehicle technology, Butterworth-Heinemann, 14 Nov 2006.
Heisler, H., 1999, Vehicle and Engine Technology, 2nd Edition, London, Arnold
Websites:- http://auto.howstuffworks.com/ - How Stuff Works
http://www.theregister.co.uk/ - The Register
http://www.nationwidevehiclecontracts.co.uk/ - Nationwide Vehcile Contracts
Word Count:- 1903 words.
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