| 摘要 |
PROBLEM TO BE SOLVED: To provide a leakage testing module for fuel steam, which reduces spread of foreign substances generated from a pump. SOLUTION: When the testing module is mounted on a vehicle, since an exhaust port 202 of the pump is opened downward in the direction of gravitational force, exhausted foreign substances are dropped by the gravitational force and deposited on the inner side of a housing body 111. Air exhausted from the exhaust port 202 flows against the gravitational force into an aperture section 123 through an arcuate gap 203 formed between the housing body 111 and a cover 250 and a casing 260. Therefore, even in the case the foreign substances are disturbed upward by flows of the exhausted air, the foreign substances are dropped by the gravitational force and do not reach the aperture section 123. As a result, the foreign substances generated from the pump 200 are deposited near the exhaust port 202 and separated from the flow of the air flowing from the exhaust port 202 to the aperture section 123, thereby preventing the spread of the foreign substances generated from the pump 200. COPYRIGHT: (C)2005,JPO&NCIPI
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