Rajan Wilcox
German scientist and inventor Rudolf Diesel is credited with founding diesel fuel through his experiments with compression-ignition engines in the 1890s. Diesel, who was born in 1858 in France, began his career as a refrigerator engineer and worked on various heat engines, including a solar-powered air engine. He understood thermodynamics and the constraints on fuel efficiency, and his work in engine design was driven by a goal of achieving higher efficiency ratios. Diesel's engine was designed to work with a diverse range of fuels, and early versions ran on everything from ammonia to whale oil. The first successful diesel engine was officially tested in 1897, and diesel fuel was standardised internationally following World War II, leading to its widespread use in commercial and industrial sectors.
| Characteristics | Values |
|---|---|
| Name of founder | Rudolf Diesel |
| Date of birth | 18 March 1858 |
| Nationality | German |
| Occupation | Inventor and mechanical engineer |
| Engine type | Diesel engine, compression-ignition engine |
| Engine characteristics | Smaller and lighter than steam engines, higher fuel efficiency, no need for external ignition |
| Fuel type | Diesel fuel, also known as diesel oil or heavy oil |
| Fuel characteristics | Liquid fuel, derived from petroleum or other sources such as biomass, animal fat, biogas, natural gas, and coal liquefaction |
| Standardization | Standardized internationally following WWII, with further standardization in specific regions |
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What You'll Learn
Rudolf Diesel invented the diesel engine
Diesel understood thermodynamics and the theoretical and practical constraints on fuel efficiency. He knew that up to 90% of the energy available in the fuel is wasted in a steam engine. Driven by the goal of achieving much higher efficiency ratios, he began conceptualizing the idea of a diesel engine in the early 1890s.
Diesel's design utilized compression ignition, doing away with spark plugs used in similar gas engines. This allowed the engine to run on biodiesel or petroleum-originating fuels. Compression engines are approximately 30% more efficient than conventional gas-burning engines. The diesel engine was also smaller and lighter than most contemporary steam engines, and it did not require additional fuel sources.
The first successful diesel engine, Motor 250/400, was officially tested in 1897. It featured a 25 horsepower four-stroke, single vertical cylinder compression. Diesel's engine was originally run on peanut oil, and he was also interested in using coal dust or vegetable oil as fuel.
Today, diesel engines are commonly used in submarines, ships, locomotives, large trucks, and electric generating plants. Diesel fuel is derived from the refinement of crude oil, which is extracted from the ground through wells and offshore rigs. It is a specific fractional distillate of petroleum fuel oil, although alternative sources that are not derived from petroleum, such as biodiesel, are also used.
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Diesel engines are more fuel-efficient
Rudolf Diesel, a German inventor and mechanical engineer, invented the diesel engine in the 1890s. The engines are named after him, and the fuel is named after the engines.
Diesel engines are more efficient than gas engines, especially on highways. According to a study by The Motley Fool, diesel engines were 29% more efficient on the highway and 24% more efficient in the city. This is because diesel fuel packs more energy in every gallon than gas fuel. Diesel engines are also more efficient for those who drive long distances, as they have higher torque, which results in better fuel economy.
However, diesel engines are not always the most cost-effective option. While diesel fuel is typically cheaper than petrol, diesel cars often have higher purchase prices and maintenance costs. These higher upfront costs can offset fuel savings, especially for low-mileage drivers. Diesel engines are also less efficient for city driving.
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Diesel fuel is derived from crude oil
Rudolf Diesel, a German scientist and inventor, invented the Diesel engine in the 1890s. The engine was designed to enable independent craftsmen and artisans to compete with large industry. Diesel's design utilised compression ignition, as opposed to spark plugs in gas engines, and could be run on biodiesel or petroleum-originating fuels.
Diesel fuel, also called diesel oil, heavy oil, or simply diesel, is a liquid fuel designed for use in a diesel engine. The most common type of diesel fuel is a specific fractional distillate of petroleum fuel oil, which is derived from the refinement of crude oil. Crude oil is a naturally occurring liquid that can be refined into various fuels and other petroleum-based products. The process of distillation transforms crude oil into different fuels and petroleum-based products.
To create diesel fuel, the viscous, dark, thick crude oil is heated to over 400 degrees Celsius, turning it into a vapour. This vapour then enters a fractional distillation tower, where it begins to cool. As the vapour rises, it reaches a certain temperature and the hydrocarbon chains within it return to a liquid state. Distillation plates capture these liquids at different levels of the tower. As the vapour cools further, shorter hydrocarbon chains begin to liquefy, and fuel oil is created. This process continues up the tower, with various distillates emerging as the vapour cools.
Another method for creating diesel fuel involves recombining the shorter hydrocarbon chain distillates in specific proportions. This creates a diesel fuel that is ready to have required additives blended in before being sold.
Petroleum diesel is the most common type of diesel fuel, and it is produced by the fractional distillation of crude oil between 200 and 350 °C at atmospheric pressure. This results in a mixture of carbon chains that typically contain between 9 and 25 carbon atoms per molecule. However, other sources of diesel fuel include biomass, animal fat, biogas, natural gas, and coal liquefaction.
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Diesel fuel has multiple colloquial names
German inventor and mechanical engineer Rudolf Diesel invented the diesel engine, which burns diesel fuel. Both the engine and the fuel are named after him. Diesel was born in Paris, France, in 1858 and began his career as a refrigerator engineer. He understood thermodynamics and the constraints on fuel efficiency, and his work in engine design was driven by the goal of achieving much higher efficiency ratios.
Before diesel fuel was standardized, diesel engines typically ran on cheap fuel oils, which are still used in watercraft diesel engines. Diesel fuel can also be used to power several non-diesel engines, such as the Akroyd engine, the Stirling engine, or boilers for steam engines. Diesel is often used in heavy trucks, but diesel exhaust, especially from older engines, can cause health issues.
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Diesel engines can run on biodiesel
Rudolf Diesel, a German inventor and mechanical engineer, invented the diesel engine in the 1890s. The engine was designed to enable independent craftsmen and artisans to compete with large industry. Diesel's design used compression ignition, unlike gas engines that use spark plugs, and could be run on biodiesel.
Biodiesel is a renewable, biodegradable alternative fuel made from a mix of modified vegetable oils and diesel fuel. In the initial period of biodiesel commercialisation, from the 1990s to the early 2000s, neat biodiesel was available at the pump in some geographical areas, such as Germany. Today, biodiesel is blended at a rate of 5% or less into almost all the diesel fuel sold in the United States. The primary source for biodiesel in the U.S. is soybean oil, although it is also made from used restaurant oil from cooking, animal tallow, synthesis gas originating from waste cellulose gasification, and extraction of lipids from algae.
Biodiesel can be used in existing diesel engines without modifications, although there are some potential issues with biodiesel fuels. For example, depending on the engine make, model, and model year, the engine components that come into contact with the fuel may be made from incompatible materials. Oil dilution is another potential issue, as there is a possibility that some fuel will make its way into the engine's crankcase and dilute the lubricating oil. Over time, the accumulated fuel can amount to a significant proportion of the engine's oil capacity, impacting the longevity of the engine.
Despite these potential issues, biodiesel has several advantages. Biodiesel is the U.S. government's preferred fuel type due to its lower emissions and the national drive to reduce reliance on petroleum. It is used by all four branches of the U.S. military, as well as state, city, and private fleets. Biodiesel is also often used on farms, in manufacturing equipment, and in the construction industry. While there are disadvantages to making the transition to biodiesel fuel, most would agree that the benefits outweigh the potential problems.
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Frequently asked questions
German scientist and inventor Rudolf Diesel invented the diesel engine and diesel fuel in the 1890s.
Diesel fuel, also called diesel oil, is any liquid fuel specifically designed for use in a diesel engine.
A diesel engine is a type of internal combustion engine in which fuel ignition takes place without a spark as a result of compression of the inlet air and then injection of fuel.
Rudolf Diesel's engine was designed to work with a diverse range of fuels. Early versions of the diesel engine ran on everything from ammonia to whale oil, and even vegetable oil.
Diesel wanted to enable independent craftsmen and artisans to compete with large industry. He also wanted to improve fuel efficiency, as he knew that up to 90% of the energy available in the fuel is wasted in a steam engine.
