Method for operating a vehicle brake system, control unit, and vehicle

A method for operating a vehicle brake system, the vehicle brake system including a brake booster and an electronic traction control device, which is used as a fallback level in a malfunction of the brake booster, the method comprising:

• detecting a malfunction of the brake booster;
• ascertaining a position of an accelerator pedal;
• and
• under a precondition that the accelerator pedal is released, building up a predefined initial pressure in a pressure chamber of a wheel brake cylinder of the vehicle brake system using the traction control device so that a deceleration of the vehicle is induced,
• wherein to ascertain a position of a brake pedal, a pressure in a pressure chamber of a master brake cylinder is measured.

A method for operating a vehicle brake system, the vehicle brake system including a brake booster and an electronic traction control device, which is used as a fallback level in a malfunction of the brake booster, the method comprising:

• detecting a malfunction of the brake booster;
• ascertaining a position of an accelerator pedal;
• and
• under a precondition that the accelerator pedal is released, building up a predefined initial pressure in a pressure chamber of a wheel brake cylinder of the vehicle brake system using the traction control device so that a deceleration of the vehicle is induced, wherein the malfunction of the brake booster is detected using a control unit of the traction control device, which is connected in a data-transmitting manner to the brake booster via a CAN bus.

A control unit configured to operate a vehicle brake system, the vehicle brake system including a brake booster and an electronic traction control device, which is used as a fallback level in a malfunction of the brake booster, the control unit configured to:

• detect a malfunction of the brake booster;
• ascertain a position of an accelerator pedal;
• and
• under a precondition that the accelerator pedal is released, build up a predefined initial pressure in a pressure chamber of a wheel brake cylinder of the vehicle brake system using the traction control device so that a deceleration of the vehicle is induced, wherein the pressure buildup to the initial pressure is controlled in its timing using the traction control device.

A vehicle, comprising:

• a vehicle brake system including a brake booster and an electronic traction control device;
• and
• a control unit configured to operate the vehicle brake system, the control unit configured to:
• detect a malfunction of the brake booster,
• ascertain a position of an accelerator pedal, and
• under a precondition that the accelerator pedal is released, build up a predefined initial pressure in a pressure chamber of a wheel brake cylinder of the vehicle brake system using the traction control device so that a deceleration of the vehicle is induced, wherein the pressure buildup to the initial pressure is controlled in its timing using the traction control device.