| 摘要 |
PROBLEM TO BE SOLVED: To suppress intrusion of water, foreign matters and the like into a breathing passage and to prevent the water, foreign matters and the like from reaching a pressure receiving body storing part even if they intrude into the breathing passage, without increasing the number of part items. SOLUTION: A valve case 13 is provided on an EGR pipe 12 to communicatingly connect an exhaust passage and an inlet passage by bypassing an engine, a valve body 14 to get communication with or interrupt the EGR pipe is stored in the EGR pipe so that it can be reciprocated. A pressure receiving body 16 is linked to the valve body, and a pressure receiving body storing part 13a is formed in the valve case. The pressure receiving body storing part is partitioned to a first chamber 13d and a second chamber 13e, the first chamber is in communication with an air supplying and exhausting means 24, and the second chamber is in communication with the atmosphere through a breathing passage 26. The hole diameter of the breathing passage at one of its both ends in communication with the atmosphere is formed small, and the breathing passage is formed into a maze shape.
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