초록 ▼

A control device for a recuperative braking system of a vehicle includes: an actuating device configured to (i) select the maximum value of a front axle generator braking torque and of a rear axle generator braking torque, taking into account at least one provided default variable concerning a setpo

A control device for a recuperative braking system of a vehicle includes: an actuating device configured to (i) select the maximum value of a front axle generator braking torque and of a rear axle generator braking torque, taking into account at least one provided default variable concerning a setpoint total braking torque which is predefined by a driver, (ii) control an electric motor, and (iii) control a hydraulic front axle brake circuit component and a hydraulic rear axle brake circuit component in such a way that a front axle brake pressure and a rear axle brake pressure are settable in such a way that a difference between a predefined setpoint braking torque distribution and an actual braking torque distribution present between the front axle and the rear axle is minimized.

대표청구항 ▼

1. A control device for a recuperative braking system of a vehicle, comprising: an actuating device configured to: control at least one electric motor of the vehicle, taking into account at least one provided default variable concerning a setpoint total braking torque which is predefined by a driver

1. A control device for a recuperative braking system of a vehicle, comprising: an actuating device configured to: control at least one electric motor of the vehicle, taking into account at least one provided default variable concerning a setpoint total braking torque which is predefined by a driver, in such a way that at least a front axle generator braking torque is applied to a front axle of the vehicle with the aid of the at least one electric motor;select the maximum permissible front axle generator braking torque which may be applied to the front axle with the aid of the at least one electric motor, and select the maximum permissible rear axle generator braking torque which may be applied to a rear axle of the vehicle with the aid of the at least one electric motor, taking into account at least the default variable, and control the at least one electric motor with the aid of at least one motor control signal to perform a regenerative braking; andcontrol at least one hydraulic front axle brake circuit component of a front axle brake circuit associated with the front axle, and control at least one hydraulic rear axle brake circuit component of a rear axle brake circuit associated with the rear axle, with the aid of at least one hydraulic control signal and in conjunction with the regenerative braking, in such a way that a front axle brake pressure in the front axle brake circuit and a rear axle brake pressure in the rear axle brake circuit are set in such a way that a difference between (i) a predefined setpoint braking torque distribution and (ii) an actual braking torque distribution present between the front axle and the rear axle is minimized, wherein the actuating device is configured to maintain the setpoint braking torque distribution during the regenerative braking;wherein the actuating device is configured to select the maximum permissible front axle generator braking torque and the maximum permissible rear axle generator braking torque such that a sum of the maximum permissible front axle generator braking torque and the maximum permissible rear axle generator braking torque is less than or equal to the setpoint total braking torque. 2. The control device as recited in claim 1, wherein each of the predefined setpoint braking torque distribution and the actual braking torque distribution present between the front axle and the rear axle represents a quotient of (i) a total front axle braking torque exerted on the front axle including the front axle generator braking torque and a front axle friction braking torque exerted on the front axle with the aid of at least one front axle wheel brake cylinder, and (ii) a total rear axle braking torque exerted on the rear axle including the rear axle generator braking torque and a rear axle friction braking torque exerted on the rear axle with the aid of at least one rear axle wheel brake cylinder. 3. The control device as recited in claim 2, wherein the at least one hydraulic front axle brake circuit component is at least one electromechanical plunger of the front axle brake circuit, and wherein the at least one hydraulic rear axle brake circuit component is at least one electromechanical plunger of the rear axle brake circuit. 4. The control device as recited in claim 2, wherein the at least one hydraulic front axle brake circuit component is at least one shutoff valve of the front axle brake circuit via which the front axle brake circuit is connected to a main brake cylinder of the braking system, and wherein the at least one hydraulic rear axle brake circuit component is at least one shutoff valve of the rear axle brake circuit via which the rear axle brake circuit is connected to the main brake cylinder of the braking system. 5. The control device as recited in claim 2, wherein the at least one hydraulic front axle brake circuit component is at least one pressure relief valve of the front axle brake circuit via which the front axle brake circuit is connected to a brake fluid reservoir of the braking system, and wherein the at least one hydraulic rear axle brake circuit component is at least one pressure relief valve of the rear axle brake circuit via which the rear axle brake circuit is connected to the brake fluid reservoir of the braking system. 6. The control device as recited in claim 2, wherein the at least one hydraulic front axle brake circuit component is at least one pump of the front axle brake circuit which pumps brake fluid from a brake fluid reservoir of the braking system into the front axle brake circuit, and wherein the at least one hydraulic rear axle brake circuit component is at least one pump of the rear axle brake circuit which pumps brake fluid from the brake fluid reservoir of the braking system into the rear axle brake circuit. 7. The control device as recited in claim 2, wherein the at least one electric motor is a shared generator of the front axle and of the rear axle. 8. The control device as recited in claim 2, wherein the at least one electric motor includes a front axle generator of the front axle and a rear axle generator of the rear axle. 9. A recuperative braking system for a vehicle, comprising: a front axle brake circuit associated with the front axle;a rear axle brake circuit associated with the rear axle; anda control device configured to: control at least one electric motor of the vehicle, taking into account at least one provided default variable concerning a setpoint total braking torque which is predefined by a driver, in such a way that at least a front axle generator braking torque is applied to a front axle of the vehicle with the aid of the at least one electric motor;select the maximum permissible front axle generator braking torque which may be applied to the front axle with the aid of the at least one electric motor, and select the maximum permissible rear axle generator braking torque which may be applied to a rear axle of the vehicle with the aid of the at least one electric motor, taking into account at least the default variable, and control the at least one electric motor with the aid of at least one motor control signal to perform a regenerative braking; andcontrol at least one hydraulic front axle brake circuit component of the front axle brake circuit associated with the front axle, and control at least one hydraulic rear axle brake circuit component of the rear axle brake circuit associated with the rear axle, with the aid of at least one hydraulic control signal and in conjunction with the regenerative braking, in such a way that a front axle brake pressure in the front axle brake circuit and a rear axle brake pressure in the rear axle brake circuit are set in such a way that a difference between (i) a predefined setpoint braking torque distribution and (ii) an actual braking torque distribution present between the front axle and the rear axle is minimized, wherein the control device is configured to maintain the setpoint braking torque distribution during the regenerative braking;wherein the actuating device is configured to select the maximum permissible front axle generator braking torque and the maximum permissible rear axle generator braking torque such that a sum of the maximum permissible front axle generator braking torque and the maximum permissible rear axle generator braking torque is less than or equal to the setpoint total braking torque. 10. The recuperative braking system as recited in claim 9, wherein: the front axle brake circuit is non-decoupleably connected to a main brake cylinder of the braking system together with at least one electromechanical plunger as the at least one front axle brake circuit component; andthe rear axle brake circuit is (i) decoupleably connected to the main brake cylinder via a shutoff valve, and (ii) decoupleably connected to a brake fluid reservoir of the braking system via a pressure relief valve. 11. A method for decelerating a vehicle, comprising: performing a regenerative braking by operating at least one electric motor in generator mode for exerting a front axle generator braking torque on a front axle to decelerate the front axle, and at the same time exerting a rear axle generator braking torque on a rear axle of the vehicle, wherein the front axle generator braking torque and the rear axle generator braking torque are selected to be maximum values, taking into account at least one setpoint total braking torque, which is predefined by a driver of the vehicle; andsetting, in conjunction with the regenerative braking, (a) a front axle brake pressure in a front axle brake circuit associated with the front axle, and (b) setting a rear axle brake pressure in a rear axle brake circuit associated with the rear axle, in such a way to minimize a difference between (i) a predefined setpoint braking torque distribution and (ii) an actual braking torque distribution present between the front axle and the rear axle, wherein the setpoint braking torque distribution is maintained during the regenerative braking;wherein the maximum permissible front axle generator braking torque and the maximum permissible rear axle generator braking torque are selected such that a sum of the maximum permissible front axle generator braking torque and the maximum permissible rear axle generator braking torque is less than or equal to the setpoint total braking torque. 12. The method as recited in claim 11, wherein each of the predefined setpoint braking torque distribution and the actual braking torque distribution present between the front axle and the rear axle represents a quotient of (i) a total front axle braking torque exerted on the front axle including the front axle generator braking torque and a front axle friction braking torque exerted on the front axle with the aid of at least one front axle wheel brake cylinder, and (ii) a total rear axle braking torque exerted on the rear axle including the rear axle generator braking torque and a rear axle friction braking torque exerted on the rear axle with the aid of at least one rear axle wheel brake cylinder. 13. The method as recited in claim 12, wherein a shared generator of the front axle and the rear axle is operated as the at least one electric motor for exerting the front axle generator braking torque on the front axle and at the same time for exerting the rear axle generator braking torque on the rear axle. 14. The method as recited in claim 12, wherein the at least one electric motor includes a front axle generator of the front axle and a rear axle generator of the rear axle. 15. The method as recited in claim 12, wherein: the front axle brake pressure in the front axle brake circuit, which is non-decoupleably connected to a main brake cylinder of the braking system, is set with the aid of at least one electromechanical plunger of the front axle brake circuit;the rear axle brake pressure in the rear axle brake circuit, which is decoupleably connected to the main brake cylinder via a shutoff valve, is set with the aid of at least one of (i) a pressure relief valve of the rear axle brake circuit, via which the rear axle brake circuit is connected to a brake fluid reservoir of the braking system, and (ii) at least one pump of the rear axle brake circuit, with the aid of which brake fluid is pumped from the brake fluid reservoir into the rear axle brake circuit. 16. A control device for a recuperative braking system of a vehicle, comprising: an actuating device configured to: control at least one electric motor of the vehicle, taking into account at least one provided default variable concerning a setpoint total braking torque which is predefined by a driver, in such a way that at least a front axle generator braking torque is applied to a front axle of the vehicle with the aid of the at least one electric motor;select the maximum permissible front axle generator braking torque which may be applied to the front axle with the aid of the at least one electric motor, and select the maximum permissible rear axle generator braking torque which may be applied to a rear axle of the vehicle with the aid of the at least one electric motor, taking into account at least the default variable, and control the at least one electric motor with the aid of at least one motor control signal to perform a regenerative braking; andcontrol at least one hydraulic front axle brake circuit component of a front axle brake circuit associated with the front axle, and control at least one hydraulic rear axle brake circuit component of a rear axle brake circuit associated with the rear axle, with the aid of at least one hydraulic control signal and in conjunction with the regenerative braking, in such a way that a front axle brake pressure in the front axle brake circuit and a rear axle brake pressure in the rear axle brake circuit are set in such a way that a difference between (i) a predefined setpoint braking torque distribution and (ii) an actual braking torque distribution present between the front axle and the rear axle is minimized, wherein the actuating device is configured to maintain the setpoint braking torque distribution during the regenerative braking;wherein the actuating device is configured to maintain the setpoint braking torque distribution only as long as a sum of braking torques exerted with the aid of the at least one electric motor, the front axle brake circuit and the rear axle brake circuit is equal to the setpoint total braking torque.