The invention relates to a rail vehicle having a sanitary system, which comprises a wastewater tank and a freshwater tank, which are each equipped with assigned fill level sensors.
Monitoring the fill levels of the wastewater tank and the freshwater tank of a sanitary system in order to be able to take it out of operation if needed is known in the prior art. It is taken out of operation in particular if a fill level of 95% is reached in the wastewater tank or an empty signal occurs for the freshwater tank.
In rail vehicles, the general object consists of keeping the vehicle weight or the vehicle mass as low as possible. This is because a fundamental vehicle mass determines the dimensioning of fuel reserves, which are also to be kept as small as possible. Currently, the freshwater tank and the wastewater tank are each included as 100% filled in the calculation of the vehicle mass for the calculation of the fuel reserves, which therefore results in elevated fuel reserves.
Proceeding therefrom, the invention is based on the object of refining the sanitary system in a rail vehicle in such a manner that a lower vehicle mass for the calculation of the fuel reserves can be specified for the unit made of freshwater tank and wastewater tank.
This object is achieved in that a control device is provided for the control linkage between the fill levels in the freshwater tank and the wastewater tank, the control device monitoring the fill level in the wastewater tank with the aid of associated sensors and, as a function of a detected fill level in the wastewater tank, controlling the fill level in the freshwater tank.
The provided linkage between the fill levels in the freshwater tank, on the one hand, and the wastewater tank, on the other hand, allows the total filling quantity in the water tanks of the sanitary system to be controlled so that, for example, a predefined maximum value for the total filling of the freshwater and wastewater tanks is not exceeded. It is therefore possible to have this maximum value incorporated into the calculation of the vehicle mass.
The monitoring of the fill level of the wastewater tank can be performed in various ways, for example continuously, cyclically, or upon reaching a predetermined limiting value for the fill level in the wastewater tank. Independently of the type of the monitoring of the fill level in the wastewater tank, the control device can lock filling lines of the freshwater tank upon reaching a predetermined fill level in the wastewater tank. It is thus ensured that the freshwater tank is not brought by filling to such a fill level that the quantity of water located in the freshwater tank can no longer be accommodated by the wastewater tank. It is particularly important to avoid the case that, for example, the wastewater tank is already 95% filled and nonetheless the freshwater tank is completely filled in a new filling procedure.
Locking of the filling lines of the freshwater tank can be performed in various ways: The filling is performed equipped with the aid of a filling stop socket or solenoid valves are provided in the course of the filling lines, using which the filling lines can be blocked. A combination of these two procedures is also possible. In both cases, the control device processes the signals of the active components, namely the filling stop socket or solenoid valves, so that the desired locking of the filling lines is achieved.
In a further embodiment of the invention, it can also be provided that the control device empties the freshwater tank, as a function of a fill level of the wastewater tank, via an outlet or overflow line. This embodiment goes beyond the above-explained embodiment in that not only is further filling of the freshwater tank avoided, but rather the fill level of the freshwater tank is adapted to that of the wastewater tank. This adaptation advantageously occurs in such a manner that the control device empties the freshwater tank to such a fill level that the remaining freshwater can be accommodated by the wastewater tank.
In further embodiments, a fill level of the wastewater tank can be signaled generally. It can be provided that the fill level sensor of the wastewater tank is connected to a display device on a rail vehicle outer side, the display device then being used as the output device for current status messages of the fill level sensor. Alternatively or additionally, the fill level sensor can also be connected to a diagnostic device of the rail vehicle, to which the current status messages are signaled. In the first mentioned alternative, the displayed status message can be reacted to manually as needed, while in the second case the diagnostic device can automatically derive measures from the signaled status message about the fill level of the wastewater tank.
Exemplary embodiments of the invention will be explained in greater detail hereafter with reference to the drawings. In the figures:
The illustration of
In addition, current measured values from the fill level sensor 3 of the wastewater tank 1 are also supplied to a display device 5 attached to the vehicle outer side and a vehicle diagnostic device 6. The display device 5 can also be designed as a simple indicator light, which solely indicates that a limiting value for the fill level in the wastewater tank 1 has been exceeded.
The fill level in the wastewater tank 1 is monitored continuously, cyclically, or upon reaching a limiting value, specifically with the aid of the fill level sensor 3 in combination with the control device 4.
In
The embodiment according to
The two embodiments of the sanitary system for a rail vehicle presented on the basis of
This can be performed according to an embodiment according to
In the embodiment according to
The provided bypass line allows continuous emptying of the freshwater tank 2 to be performed upon reaching a predetermined fill level in the wastewater tank 1 via the provided solenoid valve 12.
Number | Date | Country | Kind |
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10 2009 051 351.5 | Oct 2009 | DE | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/EP10/66268 | 10/27/2010 | WO | 00 | 4/30/2012 |