TANK SYSTEM FOR A MOTOR VEHICLE COMPRISING A VOLUME MODIFYING ELEMENT

摘要

The invention relates to a tank system of a motor vehicle comprising a volume modifying element (11) which is provided in the inner chamber of the fuel tank (1) and which is used to equalize the vapor pressure and said compensation volume is connected to the surrounding area (U). The only connection between the volume modifying element (11) and the surrounding area is formed by a storage unit (8) of the gaseous fuel components and the inner chamber of the fuel tank (1) is connected to the surrounding area (U) by means of a valve unit (7), which is normally open when filling the fuel tank (1) and when exceeding or falling below the pressure limits in the inner chamber of the tank, and is otherwise closed, and the storage unit (8) is connected to said valve unit (7) used for gaseous fuel components. Said volume modifying element (11) and the valve unit (7) are designed in such a way that vehicles which are parked for several days do not undergo "diurnal losses" due to the changes in temperature of the surroundings, due to the fact that the vapour pressure equilibrium in the fuel tank (1) can be maintained by the automatic supply and removal of ambient air in the or from the volume modifying element (11) as long as the valve unit (7) remains closed.