Cold Start Performance of Diesel Engines : 1 st Report, Effects of Prereaction on Cold Start

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概要

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• A series of studies on combustion mechanism in cold start of diesel engines conducted by means of chemical analysis, flame observation, measurements of compression pressure and motoring torque are presented in this paper. For the purpose of making the cold start easy, it is generally practiced to add some amount of liquid fuel, such as gasoline, into the intake air. Then such gasoline-air mixture makes a prereaction by compression heat, which increases the compression pressure and decreases the motoring torque as well. It was clarified by the analysis of the exhaust gas that peroxide and aldehyde were produced. In the intermediate products, peroxide promotes the ignition and formaldehyde acts as an inhibitor. Addition of methane or town gas to suction air inhibits the prereaction. In a start test with ordinary injection of fuel, addition of these gases strongly inhibits the ignition of the fuel. In starting, using only the injected fuel, the combustion is supposed to be the "low temperature mode".

• 一般社団法人日本機械学会の論文

著者

• Fukazawa Shoichi

  Department Of Mechanical Engineering Hokkaido University

関連論文

• Cold Start Performance of Diesel Engines : 1 st Report, Effects of Prereaction on Cold Start
• Cold Start Performance of Diesel Engines : 2 nd Report, Some Factors Affecting the Ignition in Cold Start

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