Vehicle for passenger transport with a pressure protection device

Abstract

A passenger transport vehicle includes an air opening connecting an environment having external pressure, to a vehicle interior for people having interior pressure. A flap opens or closes the opening and a pressure protection facility controls the flap. The pressure protection facility has a measuring apparatus detecting pressure difference between external pressure at an external pressure connection and interior pressure at an interior pressure connection, of the measuring device. A pressure evaluation facility, which monitors pressure difference values from the measuring apparatus, closes of the flap when the pressure difference reaches a predefined closing threshold value, and opens the flap if the pressure difference reaches a predefined opening threshold value. When the flap is opened, the pressure differential is formed at the measuring apparatus from the external pressure and a reference interior pressure provided by a reference apparatus simulating interior pressure behavior of the vehicle with the flap closed.

1 .- 9 . (canceled) 
     
     
         10 . A vehicle for passenger transport, the vehicle comprising:
 at least one air opening connecting an environment of the vehicle having an external pressure, to an interior of the vehicle having an internal pressure and being provided for accommodating passengers;   at least one pressure protection flap for opening or closing said air opening;   a pressure protection facility for controlling said at least one pressure protection flap, said pressure protection facility having a measuring apparatus including an external pressure connection and an internal pressure connection, said measuring apparatus configured for detecting a pressure differential between the external pressure prevailing at said external pressure connection and the internal pressure prevailing at said internal pressure connection, and said pressure protection facility having a pressure evaluation facility for monitoring pressure differential values supplied by said measuring apparatus;   said pressure evaluation facility configured to trigger a closing of said at least one pressure protection flap upon the pressure differential reaching a predetermined closing threshold value and configured to trigger an opening of said at least one pressure protection flap upon the pressure differential reaching a predetermined opening threshold value;   a reference apparatus providing a reference internal pressure simulating an internal pressure behavior of the vehicle upon said at least one pressure protection flap being closed; and   said pressure protection facility configured to cause the pressure differential to be formed at said measuring apparatus from the external pressure and the reference internal pressure, upon said at least one pressure protection flap being open.   
     
     
         11 . The vehicle according to  claim 10 , wherein said reference apparatus includes an external air connection connected to the environment of the vehicle for simulating the internal pressure, an air reservoir for simulating the interior of the vehicle and a throttle valve for simulating a leakage of the interior of the vehicle, said air reservoir having one side connected via said throttle valve to said external air connection and another side connected to said internal pressure connection of said measuring apparatus. 
     
     
         12 . The vehicle according to  claim 11 , which further comprises a filter disposed between said throttle valve and said external air connection. 
     
     
         13 . The vehicle according to  claim 11 , wherein said throttle valve is constructed as a capillary having at least one of an adjustable effective length or an adjustable effective inner diameter. 
     
     
         14 . The vehicle according to  claim 13 , wherein said adjustable effective inner diameter is 0.13-0.75 mm and said adjustable effective length has a total length of 2-30 cm. 
     
     
         15 . The vehicle according to  claim 10 , which further comprises a switchable solenoid valve connecting said inner pressure connection of said measuring apparatus to the interior of the vehicle, said pressure evaluation facility being configured to open said switchable solenoid valve upon said at least one pressure protection flap being closed, to form the pressure differential at said measuring apparatus from the external pressure and an actual internal pressure in the interior of the vehicle. 
     
     
         16 . The vehicle according to  claim 15 , which further comprises a sound damper disposed between said switchable solenoid valve and the interior of the vehicle. 
     
     
         17 . The vehicle according to  claim 10 , wherein said air opening is constructed as a fresh air opening or an exhaust air opening. 
     
     
         18 . The vehicle according to  claim 10 , wherein said at least one air opening includes a plurality of air openings, said at least one pressure protection flap includes a plurality of pressure protection flaps each associated with a different respective one of said air openings, and said pressure protection flaps are jointly controlled by said pressure protection facility via a control line. 
     
     
         19 . The vehicle according to  claim 10 , wherein said measuring apparatus is one of two measuring apparatuses each disposed on a respective one of two sides of the vehicle, and a connecting line connects said external pressure connection of said measuring apparatus on one side of the vehicle in terms of flow to said external pressure connection of said measuring apparatus on another side of the vehicle.