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摘要

A crankcase ( 100 ) for an engine includes a first bank ( 102 ) of cylinders that has a plurality of cylinder bores ( 104 ) formed therein, and a second bank ( 102 ) of cylinders that includes an additional plurality of cylinder bores ( 104 ). The second bank ( 102 ) is at an angle with respect to the first bank ( 102 ). A valley structure ( 106 ) is located between the first bank ( 102 ) and the second bank ( 102 ). A gallery ( 122 ) is located between the first bank ( 102 ), the second bank ( 102 ), and the valley structure ( 106 ). The gallery ( 122 ) has at least one rear opening ( 118 ) that fluidly connects the gallery ( 102 ) to a rear portion ( 120 ) of the crankcase. At least one front opening ( 210 ) fluidly connects the gallery ( 122 ) to a front portion ( 116 ) of the crankcase ( 100 ). At least one breather opening ( 124 ) fluidly connects the gallery ( 122 ) to an outer valley surface ( 107 ).