| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure which prevents a rise of a temperature of oil flowing in a supply oil passage, and allows the oil in the supply oil passage to maintain a low temperature in the supply oil passage for supplying the oil to piston jets arranged at an internal combustion engine, in the oil passage of the internal combustion engine (1) which comprises: a crank case (2); cylinder blocks (3F, 3R) which are integrally connected to the crank case (2); pistons (12) accommodated in the cylinder blocks; the piston jets (53) which are arranged at the cylinder blocks, and supply the oil of the internal combustion engine (1) to the pistons (12); and a breather device (30) which is integrally formed at the cylinder blocks so as to communicate with the inside of the crank case (2).SOLUTION: A supply oil passage (50) for supplying oil to piston jets (53) is integrally formed at a wall body contacting with outside air out of a peripheral wall forming a breather device (30). |
