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  • Diesel engine

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    Diesel generator on an oil tanker The diesel engine (also known as a compression-ignition or CI engine), named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel, which is injected into the combustion chamber, is caused by the elevated temperature of the air in the cylinder due to the mechanical compression (adiabatic compression). Diesel engines work by compressing only the air. This increases the air temperature inside the cylinder to such a high degree that atomised diesel fuel injected into the combustion chamber ignites spontaneously. This contrasts with spark-ignition engines such as a petrol engine (gasoline engine) or gas engine (using a gaseous fuel as opposed to petrol), which use a spark plug to ignite an air-fuel mixture. In diesel engines, glow plugs (combustion chamber pre-warmers) may be used to aid starting in cold weather, or when the engine uses a lower compression-ratio, or both. The original diesel engine operates on the "constant pressure" cycle of gradual combustion and produces no audible knock.

  • Dieseling

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    Dieseling or engine run-on is a condition that can occur in spark-plug-ignited, gasoline powered internal combustion engines, whereby the engine keeps running for a short period after being turned off, due to the engine kicking back upon shutdown, drawing fuel through the carburetor, into the engine and igniting it without a spark. Dieseling is so named because it is similar in effect to how diesel engines operate: by firing without a spark. The ignition source of a diesel engine is the heat generated by the compression of the air in the cylinder, rather than a spark as in gasoline engines. The dieseling phenomenon occurs not just because the compression ratio is sufficient to cause auto-ignition of the fuel, but also because a hot spot inside the cylinder (spark plug electrode, combustion-chamber/valve edge or even excess carbon) starts combustion. An automobile engine that is dieseling will typically sputter, then gradually stop. This is normally seen in carbureted engines with many miles on them. Dieseling is not nearly as common as it once was, because it most commonly occurs in engines equipped with carburetors.

  • Clarke Energy

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    Clarke Energy is a privately owned multinational company specialising in the sale, engineering, installation and maintenance of power plants that use gas engines. Clarke Energy is an independent company with its head offices located in Knowsley, Liverpool and is an authorised distributor and service partner for General Electric's Jenbacher and Waukesha gas engines. Clarke Energy has over 1,000 staff in seventeen countries worldwide including Algeria, Australia, Bangladesh, Cameroon, France, India, Ireland, New Zealand, Nigeria, Tanzania, Tunisia, South Africa, Botswana, Mozambique, Swaziland and Lesotho. The company maintains a portfolio of applications for both low-carbon power and renewable energy generation.

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