| 摘要 |
PROBLEM TO BE SOLVED: To detect the intake air negative pressure of a device and the failure or the like of an atmospheric pressure switching mechanism by providing a means for detecting the intake air amount of an internal combustion engine and a means for determining an abnormality based on the value of detecting an intake air amount during the operation of a variable vibration control support device in an engine mount. SOLUTION: If clogging occurs in an atmospheric pressure passage 14 or an intake air negative pressure passage 15, the amount of atmosphere introduced to the space part of a variable engine mount 2 is reduced from that at a normal time. If an operational failure occurs in VSV 16, or if the operation of VSV 16 fails, an atmospheric pressure or an intake air negative pressure is continued to be introduced to the space part of the engine mount 2, and the amount of atmosphere flowing from the variable engine mount 2 to a serge tank 6 is reduced from that at a normal time. Thus, a relationship between the control value of VSV 16 and an intake air amount is prestored and, if a differenceΔga is lower than an increase amountα, the occurrence of abnormality in the atmospheric pressure passage 14, the intake air negative pressure passage 15 or VSV 16 is determined. |
