Method for operating a brake-boosted hydraulic brake system of a vehicle and control device for a brake-boosted hydraulic brake system of a vehicle

A method for operating a brake-boosted hydraulic brake system of a vehicle, comprising:

• ascertaining information relating to an increase or a decrease in at least one additional braking force exerted on at least one wheel of the vehicle in addition to a hydraulic braking force of the brake system;
• altering an assistance force provided by a brake booster by a force difference, taking account of the ascertained information, in such a way that the hydraulic braking force is altered in a manner corresponding to the increase or decrease in the additional braking force;
• and
• displacing a volume of a brake medium of the brake system between at least one chamber of an accumulator and a volume of the brake system outside the accumulator taking account of the ascertained information, in such a way that a compensating force corresponding to the force difference is exerted on a brake input element of the brake booster, the accumulator chamber including at least one of:
• i) at least one plunger, and ii) at least one two-chamber cylinder.

A control device for a brake-boosted hydraulic brake system of a vehicle, comprising:

• an input device which is configured to receive information relating to an increase or a decrease in at least one additional braking force exerted on at least one wheel of the vehicle in addition to a hydraulic braking force of the brake system and to provide at least one received signal corresponding to the information;
• a first evaluation device which is configured to specify a target force alteration quantity in respect of a target alteration of an assistance force providable by a brake booster, taking account of the at least one received signal;
• a first actuation device which is configured to output to the brake booster a first control signal corresponding to the specified target force alteration quantity, so that the assistance force is alterable by a force difference corresponding to the specified target force alteration quantity and the hydraulic braking force is alterable in a manner corresponding to the increase or decrease in the additional braking force;
• a second evaluation device which is configured to specify a target volume displacement quantity in respect of a target volume displacement of a brake medium of the brake system between at least one chamber of an accumulator and a volume of the brake system outside the accumulator, taking account of the at least one received signal, the accumulator chamber being an accumulator chamber of at least one of:
• i) at least one plunger, and ii) at least one two-chamber cylinder;
• and
• a second actuation device which is configured to output to at least one brake medium delivery element of the brake system a second control signal corresponding to the specified target volume displacement quantity, so that a volume of the brake medium corresponding to the specified target volume displacement quantity is displaceable between the at least one accumulator chamber and the volume of the brake system outside the accumulator and so that a compensating force corresponding to the force difference is exertable on the brake input element.

A brake-boosted hydraulic brake system, comprising:

• a brake booster acting on a force introduction element with an assistance force;
• at least one of:
• i) at least one plunger, and ii) at least one two-chamber cylinder;
• and
• a control device, including an input device which is configured to receive information relating to an increase or a decrease in at least one additional braking force exerted on at least one wheel of the vehicle in addition to a hydraulic braking force of the brake system and to provide at least one received signal corresponding to the information, a first evaluation device which is configured to specify a target force alteration quantity in respect of a target alteration of an assistance force providable by a brake booster, taking account of the at least one received signal, a first actuation device which is configured to output to the brake booster a first control signal corresponding to the specified target force alteration quantity, so that the assistance force is alterable by a force difference corresponding to the specified target force alteration quantity and the hydraulic braking force is alterable in a manner corresponding to the increase or decrease in the additional braking force, a second evaluation device which is configured to specify a target volume displacement quantity in respect of a target volume displacement of a brake medium of the brake system between at least one chamber of an accumulator and a volume of the brake system outside the accumulator, taking account of the at least one received signal, the accumulator chamber being an accumulator chamber of at least one of:
• i) at least one plunger and ii) at least one two-chamber cylinder, and a second actuation device which is configured to output to at least one brake medium delivery element of the brake system a second control signal corresponding to the specified target volume displacement quantity, so that a volume of the brake medium corresponding to the specified target volume displacement quantity is displaceable between the at least one accumulator chamber and the volume of the brake system outside the accumulator and so that a compensating force corresponding to the force difference is exertable on the brake input element.

A vehicle having a control device, comprising:

• an input device which is configured to receive information relating to an increase or a decrease in at least one additional braking force exerted on at least one wheel of the vehicle in addition to a hydraulic braking force of the brake system and to provide at least one received signal corresponding to the information;
• a first evaluation device which is configured to specify a target force alteration quantity in respect of a target alteration of an assistance force providable by a brake booster, taking account of the at least one received signal;
• a first actuation device which is configured to output to the brake booster a first control signal corresponding to the specified target force alteration quantity, so that the assistance force is alterable by a force difference corresponding to the specified target force alteration quantity and the hydraulic braking force is alterable in a manner corresponding to the increase or decrease in the additional braking force;
• a second evaluation device which is configured to specify a target volume displacement quantity in respect of a target volume displacement of a brake medium of the brake system between at least one chamber of an accumulator and a volume of the brake system outside the accumulator, taking account of the at least one received signal, the accumulator chamber being an accumulator chamber of at least one of:
• i) at least one plunger and ii) at least one two-chamber cylinder;
• and
• a second actuation device which is configured to output to at least one brake medium delivery element of the brake system a second control signal corresponding to the specified target volume displacement quantity, so that a volume of the brake medium corresponding to the specified target volume displacement quantity is displaceable between the at least one accumulator chamber and the volume of the brake system outside the accumulator and so that a compensating force corresponding to the force difference is exertable on the brake input element.