Abstract
In order to reduce the fuel consumption at partial load in an indirect injection (IDI) diesel engine, a new engine system was installed in a four-cylinder diesel engine, and tests were conducted to investigate its potential. It was clarified that enlargement of the jet passage area under the new combustion chamber with a refined jet passage to reduce heat loss ; use of higher temperature cooling water and lubricating oil ; and delay of the closing timing of intake valves in order to reduce friction loss are effective methods for reducing the fuel consumption at partial load. This new engine system was proven to reduce fuel consumption at partial load by approximately 20%.
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More From: TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
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