Air spring with additional air chamber

The utility model discloses an air spring with an additional air chamber for an automotive suspension. The air spring comprises a metal cylinder with an opening on the top, wherein a limiting plate is hermetically connected at the opening on the top; a main air chamber rubber air bag is arranged in the metal cylinder; the metal cylinder is divided into an upper part space and a lower part space by the main air chamber rubber air bag; the upper part space is enclosed by the upper part of the main air chamber rubber air bag, the limiting plate and the metal cylinder; the lower part space is the additional air chamber enclosed by the lower part of the main air chamber rubber air bag and the metal cylinder; the center of the upper part of the main air chamber rubber air bag is connected with an upper cover plate, and the center of the lower part of the main air chamber rubber air bag is connected to a lower piston which is positioned in the additional air chamber; the upper part of the upper cover plate is provid