Method for controlling a braking system of a motor vehicle
AssigneeMercedes-Benz Group AG
InventorsPhilip Haug, Markus Kern, Maik Kreller
Life of this patent
Estimating the term…
Abstract
A method for controlling a braking system of a motor vehicle that includes a plurality of wheels, at least one electric motor as a drive, a service brake and a vehicle dynamic control system. The wheels can be braked by a deceleration torque applied by the service brake and at least partially by a deceleration torque (ME) applied by the electric motor where slippage which arises as a result of braking and/or of intervention by the vehicle dynamic control system is regulated at least primarily through adjustment of the deceleration torque applied by the electric motor. When necessary, a drive torque is applied to regulate slippage or to cause a locked wheel to rotate by the electric motor.
Claims5
A method for controlling a braking system of a motor vehicle comprising a plurality of wheels, at least one electric motor as a drive, a service brake and a vehicle dynamic control system, comprising:
- the plurality of wheels can be braked by a deceleration torque (MB) applied by the service brake and at least partially by a deceleration torque (ME) applied by the electric motor, wherein slippage which arises as a result of braking and/or of intervention by the vehicle dynamic control system is regulated at least primarily through adjustment of the deceleration torque (ME) applied by the electric motor;
- wherein, when necessary, a drive torque is applied to regulate slippage or to cause a locked wheel to rotate by the electric motor;
- wherein each of the plurality of wheels is driven by a respective electric motor or at least one axle of the motor vehicle is driven by the electric motor via a differential;
- wherein when there is a desire to decelerate (W), the electric motor registers and regulates an increased onset of wheel slippage via evaluated wheel speeds in relation to a limiting minimum shaft speed which is prescribed by a control unit of the vehicle dynamic control system, wherein a wheel speed and a wheel torque are registered by the electric motor and the wheel torque is regulated such that a braked wheel is operated in a slippage range prescribed by the control unit of the vehicle dynamic control system;
- wherein a detection and regulation of wheel slippage is carried out preventatively through the deceleration torque (ME) of the electric motor and the wheel speed such that a locking of the wheel and an increasing of the wheel slippage is detected and the wheel slippage is regulated before the braked wheel comes to a standstill;
- wherein the detection of the wheel slippage is carried out through a permissible minimum shaft speed and therefore increased onset of wheel slippage through the electric motor and/or by imparting a mechanical deceleration torque (MB).
Dependencies are inferred from the claim text.