Brake system and method for braking a vehicle having at least two axles

A brake system for a vehicle having at least two axles, the system comprising:

• a first axle unit which is configured to be mounted or is mounted on a first axle of the vehicle and has a motorized brake pressure build-up device, a first wheel brake cylinder, and a second wheel brake cylinder, wherein, by operation of the motorized brake pressure build-up device, brake fluid can be transferred from a connected first brake fluid reservoir into the first wheel brake cylinder and into the second wheel brake cylinder, so that a first wheel of the first axle assigned to the first wheel brake cylinder and a second wheel of the first axle assigned to the second wheel brake cylinder can be braked;
• and
• a second axle unit which can be mounted or is mounted on a second axle of the vehicle and is designed to be hydraulically separate from the first axle unit, so that, by means of operation of the second axle unit, a first wheel of the second axle and a second wheel of the second axle can be braked;
• wherein the first axle unit includes a first outlet valve assigned to the first wheel brake cylinder, and a second outlet valve assigned to the second wheel brake cylinder, and brake fluid can be let out of the first wheel brake cylinder via the first outlet valve and from the second wheel brake cylinder via the second outlet valve, into the connected reservoir.

A method for braking a vehicle having at least two axles, the method comprising the following steps:

• braking a first wheel of a first axle of the vehicle and a second wheel of the first axle by increasing, by operation of at least one motorized brake pressure build-up device of a first axle unit mounted on the first axle, brake fluid is transferred from a connected brake fluid reservoir into a first wheel brake cylinder assigned to the first wheel of the first axle and into a second wheel brake cylinder assigned to the second wheel of the first axle;
• and
• braking a first wheel of a second axle of the vehicle and a second wheel of the second axle by operation of a second axle unit which is mounted on the second axle and is configured to be hydraulically separate from the first axle unit;
• wherein brake fluid is discharged from the first wheel brake cylinder via a first outlet valve into the connected brake fluid reservoir and from the second wheel brake cylinder via a second outlet valve, into the connected brake fluid reservoir.