| 摘要 |
PROBLEM TO BE SOLVED: To increase a jetting speed of fuel and reduce its dripping, by forming a shape of each connection passage injecting fuel to each branch intake port respectively into a tapered shape, in a fuel injection passage structure provided with a fuel injection valve in the downstream location from a branch location of the intake port. SOLUTION: The downstream of an intake port 4 connected to an internal combustion engine 2 is made to branch in the first/second intake ports 8, 10, and a single fuel injection valve 6 injecting fuel to the first/second intake ports 8, 10 through the first/second connection passages 12, 14 is arranged in the downstream from this branch location. Here, the first/second connection passages 12, 14 are respectively formed into a tapered shape gradually contracted toward the downstream from the upstream. Thus by holding a high jetting speed of injection fuel, fuel sticking to the first/second connection passages 12, 14 is jetted with injection fuel to the first/second intake ports 8, 10, and dripping of fuel from the first/second intake ports 8, 10 and the first/second connection passages 12, 14 is decreased. |
