| 摘要 |
PROBLEM TO BE SOLVED: To accurately perform leakage diagnosis of an evaporated fuel purge system. SOLUTION: The minimum value of blocked purge line pressure P when temperature drops to atmospheric air temperature after engine operation is stopped and temperature rises at once is detected. And pressure difference between the minimum value and atmospheric pressure is compared with a threshold value. When the pressure difference is the threshold value or greater, a device diagnoses normal and when the pressure difference is below the threshold value, a device diagnoses leak. COPYRIGHT: (C)2006,JPO&NCIPI
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