Patent ID: 8359910

Claim:
A waterproof connecting structure for connecting an intake passage of an internal combustion engine to an external gas detector through a pipe to conduct gas from the intake passage to the external gas detector, the structure comprising: a tank forming the intake passage and having an outer peripheral wall; a partition wall having a central axis; a connecting space formed between the partition wall and the outer peripheral wall; a hole formed in the partition wall and adapted to place the intake passage and the connecting space in fluid communication, wherein the hole has a smaller cross-sectional area than that of the partition wall; and a pressure conduit and a connecting element provided at an end of the pipe and connected to the connecting space so as to fluidly connect the intake passage to the pipe through the hole and the connecting space, the pressure conduit including a distal opening having a central axis parallel to the central axis of the partition wall, the distal opening facing the partition wall through the connecting space, the connecting space having a larger diameter than the pressure conduit; wherein the hole is disposed offset from the central axes of the partition wall and the distal opening of the pressure conduit and extends along an edge of the partition wall.