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 brake system comprising:

• a first axle unit which can be installed or is installed on a first axle of the vehicle, the first axle using including at least one motorized brake pressure buildup device, a first wheel brake cylinder, and a second wheel brake cylinder, wherein, by operation of the at least one motorized brake pressure buildup device, a first brake pressure in the first wheel brake cylinder and a second brake pressure in the second wheel brake cylinder can be increased so that a first wheel of the first axle assigned to the first wheel brake cylinder and another wheel of the first axle assigned to the second wheel brake cylinder can be braked;
• and
• a second axle unit which can be installed or is installed on a second axle of the vehicle and is hydraulically separate from the first axle unit, so that, by operation of the second axle unit, a first wheel of the second axle and another wheel of the second axle can be braked;
• wherein the first axle unit is a dual-circuit first axle unit which includes a first brake circuit having a first motorized brake pressure buildup device, the first wheel brake cylinder, and a first outlet valve, and a second brake circuit having a second motorized brake pressure buildup device, the second wheel brake cylinder, and a second outlet valve, wherein the first brake circuit and the second brake circuit are each configured in such a way that, by operation of the first and second motorized brake pressure buildup device, respectively, brake fluid can be transferred from a connected brake fluid reservoir into the first and second wheel brake cylinder, respectively, and, via the first and second outlet valve, respectively, brake fluid can be discharged from the first and second wheel brake cylinder, respectively, into the connected brake fluid reservoir.

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

• braking a first wheel of a first axle of the vehicle and another wheel of the first axle by increasing, by operation of at least one motorized brake pressure buildup device of a first axle unit installed on the first axle, a first brake pressure in a first wheel brake cylinder assigned to the first wheel of the first axle and a second brake pressure in a second wheel brake cylinder assigned to another wheel of the first axle;
• and
• braking a first wheel of a second axle of the vehicle and another wheel of the second axle by operation of a second axle unit which is installed on the second axle and is hydraulically separate from the first axle unit;
• wherein, by operation of a first motorized brake pressure buildup device of a first brake circuit of the first axle unit, brake fluid is transferred from a connected brake fluid reservoir into the first wheel brake cylinder of the first brake circuit to increase the first brake pressure, and brake fluid is discharged from the first wheel brake cylinder into the connected brake fluid reservoir via a first outlet valve of the first brake circuit to reduce the first brake pressure;
• and
• by operation of a second motorized brake pressure buildup device of a second brake circuit of the first axle unit, brake fluid is transferred from a connected brake fluid reservoir into the second wheel brake cylinder of the second brake circuit to increase the second brake pressure, and brake fluid is discharged from the second wheel brake cylinder into the connected brake fluid reservoir via a second outlet valve of the second brake circuit to reduce the second brake pressure.