A method is provided to adjust an activating braking pressure threshold value of an automatic vehicle brake holding system of a vehicle. If a braking pressure that is generated through actuation of a vehicle brake of the vehicle exceeds an activating braking pressure threshold value while the vehicle is at a standstill, a brake holding state of the vehicle brake holding system is activated and a procedure for ascertaining time is started. A vehicle movement is ascertained during an activated brake holding state within a monitoring procedure period of time since starting the procedure to ascertain time. If a movement occurs within the monitoring procedure period of time, a value of a number of ascertained movements is increased. If this value exceeds a movement threshold value, the activating braking pressure threshold value is increased and the value of the number of ascertained movements is reduced.

A hydraulic brake system of a motor vehicle includes a linear actuator as a driver-independent pressure provision device and a hydraulic valve arrangement between the linear actuator and wheel brakes. In the case of a reduced availability of the linear actuator, a holding mode is carried out, in which the hydraulic pressure in the wheel brakes is shut in with the valve arrangement and a power output of the linear actuator is reduced, the system pressure gradient in the holding mode is measured, and a transition from the holding mode into an alternative mode is carried out based on the system pressure gradient.

Systems, methods, and apparatuses are provided for controlling a braking torque of a vehicle while travelling in an at least semiautomated manner. Standstill data is received, while the vehicle is traveling in the at least semiautomated manner on an incline and/or a decline, when a temporary standstill of the vehicle is requested by the assistance system. Speed values are continuously received that describe a speed of the vehicle while the vehicle is decelerating prior to the temporary standstill. Slope data is continuously determined that describes an angle of the incline or decline. An amended speed value is continuously computed that depends on the speed value and the slope data. An electronic control signal is output to control the braking torque to bring the vehicle to the temporary standstill when the amended speed value decreases below a predetermined threshold value and the standstill data are received.

A parking brake fail safety control system and method for a vehicle having an electric-axle, may enable safe parking braking on a level ground, a slope, etc. By controlling the torque from a first motor configured for a rear wheel-first electric-axle and the torque from a second motor configured for a rear wheel-second electric-axle to have the same magnitude in opposite directions and by increasing/decreasing the torque from the first motor and the torque from the second motor, depending on a change of wheel speed when a parking brake fails.

A valve module is provided for enabling a vehicle to control an autonomous event of the vehicle. The valve module comprises a relay valve, a first solenoid valve, and a second solenoid valve. A first control pressure can be delivered through the first solenoid valve and applied to a control port of the relay valve. In one embodiment, a second control pressure can be delivered through the second solenoid valve and combined with the first control pressure. The combined first and second control pressures are applied to the control port of the relay valve. In another embodiment, a second control pressure can be delivered through the second solenoid valve only when no first control pressure is delivered through the first solenoid valve.

An automatic engine stop-start system of a vehicle having an engine includes a controller in signal communication with the engine and configured to command automatically stopping and starting the vehicle engine, a first sensor in signal communication with the controller and configured to generate a first signal indicative of a grade of a road the vehicle is located on, and a master brake cylinder having a pressure sensor in signal communication with the controller, the pressure sensor configured to generate a pressure signal indicative of a master cylinder brake pressure. The controller is further configured to determine a pressure threshold based on the first signal and the pressure signal. When the pressure signal exceeds the pressure threshold, thereby indicating a driver is releasing a brake pedal of the vehicle, the controller commands automatically restarting the vehicle engine.

A vehicle control apparatus and a method for controlling the same are disclosed. The vehicle control apparatus includes an inputter, a determiner, and a controller. The inputter receives an automatic vehicle hold (AVH) switch operation signal from an AVH device, and receives a current vehicle movement value sensed by a sensing device and a current vehicle brake force value of a brake device that generates brake force in response to activation of the AVH device. The determiner determines whether the received AVH switch operation signal transitions from an ON state to an AVH entry state, determines whether vehicle movement occurs on the basis of the received current vehicle movement value during an AVH retention time in the AVH entry state, and determines that the current vehicle brake force value is in an abnormal state when vehicle movement occurs. The controller receives the current vehicle movement value and the current vehicle brake force value, and transmits a command for judgment to the determiner.

A method and electronic control unit having a functional module are provided for controlling the auto-hold function and the parking brake function in a motor vehicle, by use of a single common operating element. When the parking brake function is switched on at a standstill, the auto-hold function is simultaneously activated. When the accelerator pedal is actuated, a switched-on parking brake function is automatically switched off without the actuation of the operating element, wherein the auto-hold function remains activated. In addition, when switching off the parking brake function at a standstill, the auto-hold function is also deactivated via the actuation of the operating element.

A transportation vehicle has an autohold selector, such as a push button switch or other human-machine interface (HMI). A gear selector in the vehicle includes forward and reverse gear positions. A brake pedal can be depressed by a driver to actuate a brake actuator when slowing or stopping the vehicle. A control circuit is configured to initiate a brake hold event of the brake actuator in response to predetermined conditions including the autohold selector being on and the vehicle braking to a stop with the brake pedal depressed, wherein initiating the brake hold event is prevented if the gear selector is in the reverse position. If a brake hold event is in progress, then shifting the gear selector to reverse terminates the brake hold event. Low speed maneuvers, such as parking the vehicle, can be performed without a need for manually canceling the autohold feature.

In an information providing method for a vehicle, an engine is stopped automatically when a predetermined permission condition is satisfied in a state in which the vehicle is stopped by a brake operation executed by a driver. The permission condition is a brake operation amount of a brake having reached a predetermined brake operation amount. The driver is notified of support information prompting the driver to increase the brake operation amount when the permission condition is not satisfied after a predetermined time has elapsed since the vehicle was stopped. A braking force capable of maintaining a vehicle stop state is generated by a vehicle stop keeping control. The driver is notified of the support information when the brake operation amount decreases before the predetermined time has elapsed in a state in which the vehicle has been stopped by the brake operation and the vehicle stop keeping control is executed.