Brake System, Especially for Utility Vehicles

A brake system comprising:

• a front-axle brake circuit having a load emptying valve and front axle brake cylinder, the load emptying valve influencing a brake pressure at the front axle brake cylinders;
• and
• a rear-axle brake circuit having an automatic load-dependent brake pressure regulator and rear axle brake cylinders, a brake pressure at the rear axle brake cylinders being influenced as a function of a load acting on a rear axle;
• a fluid connection, the load emptying valve having a control inlet connected to the rear-axle brake circuit via the fluid connection;
• a check valve provided in the fluid connection between the load emptying valve and the rear-axle brake circuit;
• and
• a controller, the check valve being switched to a shutoff position when a brake slip regulating process is carried out at the rear axle by the controller so that the fluid connection from the load emptying valve in a direction of the rear axle brake cylinders is shut off;
• the check valve including an integrated nonreturn valve, the nonreturn valve, in the shutoff position of the check valve, being connected to the fluid connection and preventing a drop in pressure at the control inlet of the load emptying valve, and permitting a rise in pressure at the control inlet of the load emptying valve.