| 主权项 |
1. An air spring strut comprising an air spring and a damper for spring suspension and damping of vibrations of a motor vehicle chassis, which air spring strut is clamped between a body and a chassis of a motor vehicle,
with an air spring bellows which is composed of elastomeric material, is clamped in an airtight manner between an air spring cover and an air spring rolling piston and rolls on the air spring rolling piston with the formation of a rolling fold, with an outer guide enclosing the air spring bellows in a sleeve-shaped manner, and an expansion bellows which protects the rolling fold from dirt accumulations and which is fastened to an end of the outer guide that faces away from the air spring cover, with ventilation means for ventilating a space surrounded by the expansion bellows, wherein the ventilation means comprise ventilation openings at an end of the expansion bellows that faces the chassis, and further additional ventilation openings are provided in the expansion bellows, said ventilation openings assisting an airflow within the expansion bellows in the direction of the chassis, and wherein a structure for deflecting the airflow away from the rolling fold is provided within the expansion bellows in the region of the additional ventilation openings, the structure comprising a first portion extending inward from an inner surface of the expansion bellows in a radial direction of the damper, and a second portion extending from a radially inner end of the first portion in an axial direction of the damper away from the rolling fold. |
