To offer a mounting structure for a suction pipe pressure sensor for an internal combustion engine, with which it is possible to prevent intrusion of impurities without use of any filter or loop-shaped coupling pipe, apply to all types of pressure sensors, ensure a long duration of the function as pressure sensor, and perform the control of a high engine output for a long period of time.
A pressure lead-in port 4 for a pressure sensor 1 is furnished in such a way as protruding to the inside of a suction pipe 2, and a straightening member 5 is installed around the pressure lead-in port 4 in such a way that the suction gas flowing in the suction pipe 2 does not directly touch the lead-in port 4. Accordingly the suction gas runs against the straightening member 5 and the temp. of the suction gas is sun so that the water and/or oil contained in the suction gas is turned into liquid drops, which attach to the straightening member 5 and are cooled and condensed, and because the dust in the suction gas will be included in the water and oil to become liquid drops, intrusion of impurities into the pressure sensor 1 can be precluded.
TONAMI HIROYUKI
CHIKAHISA MASARU
OMURA YUKIHIRO
MABUCHI MOTOAKI
YOKOTA TADAFUMI
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