| 摘要 |
PURPOSE:To prevent the internal pressure of a fluid chamber in a suspension device from being lowered abnormally by detecting a ground clearance variation pattern based on ground clearance variation speed so as to detect an abnormal condition in a ground clearance control such as, for example a condition under Jacking-up and the like, based on said pattern whereby suspending a ground clearance control operation. CONSTITUTION:Ground clearance is adjusted by a ground clearance detecting means A in such a way that fluid in the fluid chamber of a suspension device D is supplied and/or emptied by a ground clearance control means C based on the result of a judgment made by a ground clearance judging means B which compares an actual ground clearance value with a target ground clearance value for making a judgment. And in this case, a ground clearance variation speed detecting means E which detects speed in ground clearance variation, is additionally provided for having a ground clearance variation pattern detecting means F detected a ground clearance variation pattern based on ground clearance variation speed. And it is judged by an abnormality judging means G as to whether or not a ground clearance control operation is abnormal based on a detected ground clearance detecting pattern. And when the ground clearance control operation is judged to be abnormal, the ground clearance control operation is suspended by a ground clearance control suspending means H. |
