| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that fuel spray of fuel injection valves 81 and 82 is entangled in the air flow flowing along a wall of an intake port 16, and fuel is adhered to the wall of the intake port 16. SOLUTION: Intake valves 40 and 50 and the fuel injection valves 81 and 82 are provided in the intake port 16, and straight wall parts 181 and 191 of the intake port 16 are formed to be the straight shape parallel to intake valve center axes Pv1 and Pv2 when viewed from a cylinder center axis direction. Therefore, the air flow flowing in the intake port 16 is sucked into the intake valves 40 and 50 along the straight wall parts 181 and 191, and the adhesion amount of the fuel to the straight wall parts 181 and 191 of the intake port 16 and an inner peripheral wall 21 of a cylinder block 11 forming a cylinder 13 can be reduced. COPYRIGHT: (C)2011,JPO&INPIT |
