Method for emergency engagement of a holding brake, and electropneumatic brake system

A method for emergency engagement of a holding brake of a vehicle having an electropneumatic brake system including a service brake system with a service brake and a holding brake system with the holding brake;

• the holding brake system having spring brake cylinders;
• the service brake system including a service brake control unit for controlling components of the service brake;
• the electropneumatic braking system including at least one brake circuit for the service brake and the holding brake, wherein the service brake and the holding brake may be in separate ones of said at least one brake circuit;
• the spring brake cylinders being able to be vented when a supply pressure in the at least one brake circuit for the service brake decreases;
• the method comprising:
• reducing, via the service brake control unit, the supply pressure in at least one brake circuit for the service brake of the at least one brake circuit under a program control in defined conditions.