Abstract: Brake actuators for a motor vehicle braking system, braking systems including the brake actuators, and motor vehicles including the brake actuators are provided. A brake actuator includes a chamber enclosing a volume configured to hold a quantity of brake fluid, a piston, a piston actuator, and a compressible medium. The piston actuator may be coupled to the piston and configured to actuate the piston. The compressible medium may be positioned relative to the chamber such that the compressible medium is subjected to a force due to pressurization of the brake fluid in the chamber. A volume of the compressible medium may be configured to be changed by the force due to the pressurization of the brake fluid.

Abstract: Systems and methods are described for reducing brake drag in a brake system of a vehicle. It may be determined that the vehicle is stationary. A brake pressure of the brake system may be monitored. The monitored brake pressure may then be compared to a brake pressure criteria. A brake pressure to be applied may be regulated when the monitored brake pressure does not meet the brake pressure criteria, wherein the applied brake pressure meets the pressure criteria.

Abstract: A motor vehicle braking method wherein the vehicle includes a brake operating unit generating a braking signal based on brake pedal travel. The method includes the step of measuring the vehicle deceleration and pedal position during vehicle braking and determining an actual ratio between the measured deceleration and pedal position. In addition, a target ratio is provided based on vehicle deceleration for a defined pedal position. Wherein the actual ratios compared with the target ratio and a braking adjustment is provided when the actual ratio deviates from the target ratio.

Abstract: A method for operating an electromechanical vehicle brake system is provided. The method includes determining that an activation condition has been met, selecting a pre-charge pressure based at least in part on the activation condition, building up at least an initial portion of the pre-charge pressure in the brake system, and applying at least the initial portion of the pre-charge pressure to at least one wheel brake.

Abstract: A method for operating an electromechanical vehicle brake system is provided. The method comprises determining that an activation condition has been met, building an initial portion of the pre-charge pressure in the brake system, applying the initial portion of the pre-charge pressure to at least one wheel brake, building a secondary portion of the pre-charge pressure in the brake system, and adjusting the secondary portion of the pre-charge pressure to an expected braking pressure. Adjusting the secondary portion of the pre-charge pressure may include reducing the secondary portion of the pre-charge pressure.

Abstract: A method for controlling a brake system of a motor vehicle wherein a central generation of brake-fluid pressure takes place electrically and essentially mechanically decoupled from the movement of a brake-actuating element. The brake pressure of individual wheels can be selectively modified depending on driving-dynamics parameters by activating hydraulic check-valve and drain-valve elements. In the case of braking events occurring before stability and/or slip limits are reached, which limits would make it necessary to use the antilock braking system and/or a stability program, the brake pressure is reduced such that the use of the hydraulic valve elements for the antilock brake system and/or the stability program is time-delayed. Further, blocking the supply of brake fluid to individual wheels or creating pressure-decrease states for individual wheels is minimized with respect to time.

Abstract: Brake actuators for a motor vehicle braking system, braking systems including the brake actuators, and motor vehicles including the brake actuators are provided. A brake actuator includes a chamber enclosing a volume configured to hold a quantity of brake fluid, a piston, a piston actuator, and a compressible medium. The piston actuator may be coupled to the piston and configured to actuate the piston. The compressible medium may be positioned relative to the chamber such that the compressible medium is subjected to a force due to pressurization of the brake fluid in the chamber. A volume of the compressible medium may be configured to be changed by the force due to the pressurization of the brake fluid.

Abstract: Systems and methods are described for reducing brake drag in a brake system of a vehicle. It may be determined that the vehicle is stationary. A brake pressure of the brake system may be monitored. The monitored brake pressure may then be compared to a brake pressure criteria. A brake pressure to be applied may be regulated when the monitored brake pressure does not meet the brake pressure criteria, wherein the applied brake pressure meets the pressure criteria.

Abstract: A motor vehicle braking method wherein the vehicle includes a brake operating unit generating a braking signal based on brake pedal travel. The method includes the step of measuring the vehicle deceleration and pedal position during vehicle braking and determining an actual ratio between the measured deceleration and pedal position. In addition, a target ratio is provided based on vehicle deceleration for a defined pedal position. Wherein the actual ratios compared with the target ratio and a braking adjustment is provided when the actual ratio deviates from the target ratio.

Abstract: A method for operating an electromechanical vehicle brake system is provided. The method comprises determining that an activation condition has been met, building an initial portion of the pre-charge pressure in the brake system, applying the initial portion of the pre-charge pressure to at least one wheel brake, building a secondary portion of the pre-charge pressure in the brake system, and adjusting the secondary portion of the pre-charge pressure to an expected braking pressure. Adjusting the secondary portion of the pre-charge pressure may include reducing the secondary portion of the pre-charge pressure.

Abstract: A method for operating an electromechanical vehicle brake system is provided. The method includes determining that an activation condition has been met, selecting a pre-charge pressure based at least in part on the activation condition, building up at least an initial portion of the pre-charge pressure in the brake system, and applying at least the initial portion of the pre-charge pressure to at least one wheel brake.