DIESEL ENGINE
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United States of America Patent
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Jun 5, 2015
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Sep 30, 2014
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Abstract
A diesel engine of the present invention includes a turbocharger including: a turbine provided on an exhaust passage; a compressor provided on an intake passage; and a plurality of nozzle vanes provided around the turbine to control a flow velocity of an exhaust gas colliding with the turbine, angles of the nozzle vanes being changeable. In a case where a ratio of a volume of a combustion chamber when the intake valve is closed to a volume of the combustion chamber when a piston is located at a top dead center is denoted by an effective compression ratio εe, and a total displacement of the engine is denoted by V (L), the effective compression ratio εe is set to satisfy Formula (1) “−0.67×V+15.2≦εe≦14.8.”
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