Abnormality judging device of variable vibration isolating support device

摘要

An object of the present invention is to provide such a technique that a breakdown of a variable vibration isolating support device, a choking up of an intake passage, or the like can be detected by using existing parts. In order to achieve this object, the abnormality judging device according to the present invention comprises: a variable vibration isolating support device which changes the vibration isolating characteristics by shifting between the introduction of intake negative pressure arising in the intake system of an internal combustion engine and the introduction of atmospheric pressure; an intake air amount detecting instrument which detects the amount of intake air of the above mentioned internal combustion engine; and an abnormality judging instrument which judges an abnormality of the above mentioned variable vibration isolating support device on the basis of the value detected by the above mentioned intake air amount detecting instrument at the time of operating of the above mentioned variable vibration isolating support device.