Method for operating a regenerative braking system of a vehicle and control unit for a regenerative braking system of a vehicle

A control unit for a regenerative braking system of a vehicle, comprising:

• an activation device that outputs:
• an at least one generator control signal, which adjusts a generator braking torque, to a generator of the braking system, and
• a brake fluid delivery mechanism control signal to at least one brake fluid delivery mechanism of the braking system to provide a total setpoint braking torque that is predefined by one of a driver of the vehicle and an adaptive cruise control by:
• controlling the braking system into a first braking mode, by providing a first regenerative portion of the generator braking torque from the generator, and
• controlling the braking system out of the first braking mode into a second braking mode by:
• providing (i) a second regenerative portion of the generator braking torque from the generator and (ii) an actual brake pressure having an actual pressure rise which increases over time, and
• triggering, by the brake fluid delivery mechanism control signal, an at least one brake fluid delivery mechanism to establish a setpoint brake pressure having a setpoint pressure rise that has a time derivation increase over time, so that the actual brake pressure is built up in one of an at least one wheel brake cylinder and an at least one brake circuit;
• wherein the second regenerative portion is smaller than the first regenerative portion,
• wherein a setpoint delivery output variable is one of established and predefined for the setpoint brake pressure, and the setpoint delivery output variable is output to the at least one brake fluid delivery mechanism via the brake fluid delivery mechanism control signal, and
• wherein the setpoint pressure rise is implemented by pumping brake fluid from a storage volume of the braking system into a respective one of the at least one wheel brake cylinder and the at least one brake circuit, through the triggered at least one brake fluid delivery mechanism.

A regenerative braking system for a vehicle, comprising:

• a control unit for a regenerative braking system of a vehicle, including:
• an activation device that outputs:
• an at least one generator control signal, which adjusts a generator braking torque, to a generator of the braking system, and
• a brake fluid delivery mechanism control signal to at least one brake fluid delivery mechanism of the braking system to provide a total setpoint braking torque that is predefined by one of a driver of the vehicle and an adaptive cruise control by:
• controlling the braking system into a first braking mode, by providing a first regenerative portion of the generator braking torque from the generator, and
• controlling the braking system out of the first braking mode into a second braking mode by:
• providing (i) a second regenerative portion of the generator braking torque from the generator and (ii) an actual brake pressure having an actual pressure rise which increases over time, and
• triggering, by the brake fluid delivery mechanism control signal, an at least one brake fluid delivery mechanism to establish a setpoint brake pressure having a setpoint pressure rise that has a time derivation increase over time, so that the actual brake pressure is built up in one of an at least one wheel brake cylinder and an at least one brake circuit;
• wherein the second regenerative portion is smaller than the first regenerative portion,
• wherein a setpoint delivery output variable is one of established and predefined for the setpoint brake pressure, and the setpoint delivery output variable is output to the at least one brake fluid delivery mechanism via the brake fluid delivery mechanism control signal, and
• wherein the setpoint pressure rise is implemented by pumping brake fluid from a storage volume of the braking system into a respective one of the at least one wheel brake cylinder and the at least one brake circuit, through the triggered at least one brake fluid delivery mechanism.