Airbag having an active ventilation device

An airbag comprising:

• a first skin which encloses a first gas space and which has a first layer which has an inner surface facing the first gas space and an outer surface facing away from the first gas space, and
• an active ventilation device which has a throttled or closed first state and an open second state and which comprises:
• a breakthrough in the first layer,
• a cover element arranged on the outer surface of the first layer which covers the breakthrough at least in sections and which is permanently connected to the first layer by means of a cover element connection, wherein the cover element connection is not closed, so that an opening area is formed between the first layer and the cover element,
• an expansion assembly comprising a second skin enclosing a second gas space and a gas generator, wherein the second skin is arranged on the inner surface of the first layer and overlaps the cover element at least in sections,
• a tear seam which has a section extending through the cover element, the first layer and the second skin and thus prevents or restricts gas escape through the opening area in the first state of the ventilation device.

An airbag unit consisting of an airbag comprising:

• a first skin which encloses a first gas space and which has a first layer which has an inner surface facing the first gas space and an outer surface facing away from the first gas space, and
• an active ventilation device which has a throttled or closed first state and an open second state and which comprises:
• a breakthrough in the first layer,
• a cover element arranged on the outer surface of the first layer which covers the breakthrough at least in sections and which is permanently connected to the first layer by means of a cover element connection, wherein the cover element connection is not closed, so that an opening area is formed between the first layer and the cover element,
• an expansion assembly comprising a second skin enclosing a second gas space and a gas generator, wherein the second skin is arranged on the inner surface of the first layer and overlaps the cover element at least in sections,
• a tear seam which has a section extending through the cover element, the first layer and the second skin and thus prevents or restricts gas escape through the opening area in the first state of the ventilation device,
• and a main inflator for filling the first gas space.