Electropneumatic brake system, vehicle, method for operating an electropneumatic brake system, with an emergency release valve unit

A vehicle comprising:

• a service brake system;
• an electropneumatic brake system having a parking brake system, a first control unit, and an emergency release valve unit;
• said parking brake system having a parking brake valve unit configured to adjust a parking brake pressure on at least one spring loading connection in dependence upon a pilot control pressure;
• said parking brake valve unit having a pilot control unit configured to, in dependence upon an electronic parking brake signal, adjust the pilot control pressure on a pilot control path;
• said parking brake valve unit having an additional brake pressure connection pneumatically connected or connectable to said pilot control path in order to introduce an emergency release pressure, wherein the introduction of said emergency release pressure on said additional brake pressure connection brings about the adjustment of said parking brake pressure on said at least one spring loading connection;
• said first control unit being configured to provide said electronic parking brake signal to said parking brake valve unit;
• and,
• said emergency release valve unit being configured to receive a service brake pressure provided by said service brake system and effective for an operating braking operation or a pressure derived from said service brake pressure and in dependence upon a received electronic emergency release signal, to provide an emergency release pressure to said additional brake pressure connection.

A method for operating an electropneumatic brake system having an emergency release valve unit, the method comprising:

• receiving via the emergency release valve unit a service brake pressure which is effective for an operating braking operation or a pressure derived from the service brake pressure;
• providing an electronic emergency release signal;
• receiving the electronic emergency release signal via the emergency release valve unit;
• providing an emergency release pressure via the emergency release valve unit in dependence upon the received electronic emergency release signal which is effective for at least one spring-loaded brake cylinder;
• and,
• receiving the emergency release pressure via the parking brake valve unit.