{"id":5841,"date":"2024-02-01T15:32:15","date_gmt":"2024-02-01T06:32:15","guid":{"rendered":"https:\/\/katuhito.info\/?p=5841"},"modified":"2024-02-01T15:32:15","modified_gmt":"2024-02-01T06:32:15","slug":"d_engine_basic","status":"publish","type":"post","link":"https:\/\/katuhito.info\/en\/d_engine_basic\/","title":{"rendered":"Basic performance of diesel engine"},"content":{"rendered":"\n

Basic performance of diesel engine<\/strong><\/h3>\n

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\nRudolf Diesel invented the four-stroke engine in 1892, which used pulverized coal as fuel and self-ignited in compressed air. In 1897, Diesel completed a practical diesel engine that used heavy fuel oil and injected it with high-pressure air. After this invention, the diesel engine was named after him.
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\nEarly diesel engines were mainly used in fixed equipment and ships, but in 1927 Bosch commercialized an injection pump with directional injection, which led to the development of a high-speed diesel engine, which was also put into practical use as an automobile engine. Ta.
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\nIn Japan, research and production of diesel engines began in the 1930s, with a 6-cylinder air-cooled diesel engine with a total displacement of 8 liters completed in 1936, and a 5.1-liter 6-cylinder water-cooled automotive diesel engine in 1939. , was put into practical use. These engines aim to increase speed and output, while at the same time attracting attention for reducing emissions of harmful substances such as NOx (nitrogen oxides) and PM (particulate matter).
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\nNote: The main component of PM is black smoke and a mixture of various components.
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The piston and cylinder diagram for one cycle is shown.<\/p><\/div>\n<\/div>\n


\nRecently, common rail type and unit injector type high pressure fuel injection devices have been adopted. These devices atomize the fuel by increasing the injection pressure and increase the total surface area. This atomization allows the fuel to contact the surrounding air and the heat of compression more effectively, improving combustion conditions and suppressing PM generation. In addition, improved ignition performance shortens ignition delay and suppresses NOx generation.
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\nHere, we will explain the general basics of diesel engines used in automobiles, such as characteristics such as combustion method and combustion output, valve timing and exhaust gas characteristics, when looking at the engine itself. think.
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\nThe general content is the basics of diesel engine combustion methods and the basic settings of valve timing to achieve them. Thermal efficiency, pressure, power, loss, volumetric efficiency brought about by engine combustion, and characteristics during engine combustion. In addition, there are disadvantages such as diesel knock, exhaust gas characteristics, and countermeasures.
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Table of contents<\/strong><\/h4>\n