Abstract: For operation of a hydraulic power vehicle braking system for autonomous driving, a brake pressure is generated using a second power brake pressure generator if, after a predefined first time span, no brake pressure or insufficient brake pressure has been generated using a first power brake pressure generator. The generation of the brake pressure using the second power brake pressure generator is aborted if, within a second time span, which is longer than the first time span, no error message is present from the first power brake pressure generator.

Abstract: For operation of a hydraulic power vehicle braking system for autonomous driving, a brake pressure is generated using a second power brake pressure generator if, after a predefined first time span, no brake pressure or insufficient brake pressure has been generated using a first power brake pressure generator. The generation of the brake pressure using the second power brake pressure generator is aborted if, within a second time span, which is longer than the first time span, no error message is present from the first power brake pressure generator.

Abstract: A control device for a vehicle deceleration device of a vehicle including an electronics unit, with the aid of which a time curve of an input variable predefined by a driver of the vehicle with the aid of an actuation of the brake actuating element is evaluatable and the vehicle deceleration device is activatable taking into account the updated input variable and a characteristic curve, which specifies a relationship between the input variable and a setpoint variable with respect to a setpoint vehicle deceleration to be exerted on the vehicle with the aid of the vehicle deceleration device. The electronics unit detects at least one modulation and/or variation of the input variable triggered by the driver and reestablishes at least one subsection of the characteristic curve taking into account the at least one modulation and/or variation of the input variable (xinput) triggered by the driver.

Abstract: Described are a method and a device for activating an electric vacuum pump for a brake booster of a vehicle. The brake booster is supplied with a vacuum from a vacuum reservoir. The vacuum pump is designed to increase the vacuum in the vacuum reservoir as soon as the vacuum drops below a predefinable switch-on threshold. In order to avoid unnecessarily frequent switching on of the vacuum pump, which may irritate the driver, an expected decrease of the vacuum in the vacuum reservoir as a result of an instantaneous braking operation is estimated and the switch-on threshold of the vacuum pump is temporarily reduced if the vacuum instantaneously prevailing in the vacuum reservoir minus the estimated vacuum decrease is greater than a predetermined adjustment point vacuum, below which the brake booster can no longer act in a sufficiently boosting manner.

Abstract: A control device for a vehicle brake system, having a control device/arrangement by which a closing signal is outputtable to an isolation valve via which a first brake circuit is hydraulically connected to a main brake cylinder, and at least one first control signal is outputtable to at least one first hydraulic component, so that a first actual brake pressure in the first brake circuit can be varied, an existing functional impairment of the at least one first hydraulic component and/or of at least one further brake system component being determinable, or a warning signal being receivable, and, if warranted, a closing signal being outputtable to a changeover valve of a second brake circuit, and, after or simultaneously with an outputting of the closing signal to the changeover valve, an opening signal being outputtable to the isolation valve. Also described is a related method for operating the vehicle brake system.

Abstract: A brake actuation recognition device has an evaluation device by which at least one provided modification quantity relating to a temporal change in an actual quantity relating to a pressure in a pressure chamber of a brake booster of a brake system is compared with a specified comparison quantity range such that, if the at least one provided modification quantity is within the comparison value range, it is determined that a brake actuating element situated on the brake system is in an actuation state below a specified minimum actuation state, and a corresponding information is outputted.

Abstract: A brake actuation recognition device has an evaluation device by which at least one provided modification quantity relating to a temporal change in an actual quantity relating to a pressure in a pressure chamber of a brake booster of a brake system is compared with a specified comparison quantity range such that, if the at least one provided modification quantity is within the comparison value range, it is determined that a brake actuating element situated on the brake system is in an actuation state below a specified minimum actuation state, and a corresponding information is outputted.

Abstract: Described are a method and a device for activating an electric vacuum pump for a brake booster of a vehicle. The brake booster is supplied with a vacuum from a vacuum reservoir. The vacuum pump is designed to increase the vacuum in the vacuum reservoir as soon as the vacuum drops below a predefinable switch-on threshold. In order to avoid unnecessarily frequent switching on of the vacuum pump, which may irritate the driver, an expected decrease of the vacuum in the vacuum reservoir as a result of an instantaneous braking operation is estimated and the switch-on threshold of the vacuum pump is temporarily reduced if the vacuum instantaneously prevailing in the vacuum reservoir minus the estimated vacuum decrease is greater than a predetermined adjustment point vacuum, below which the brake booster can no longer act in a sufficiently boosting manner.

Abstract: A control device for an electrical vacuum pump includes: a determination unit designed for the purpose of detecting an operating parameter of the electrical vacuum pump, which is dependent on an operating duration of the electrical vacuum pump, and detecting a controlled variable for the electrical vacuum pump, a switching unit designed for the purpose of activating or deactivating the electrical vacuum pump as a function of a comparison of the controlled variable to at least one setpoint value, and a regulating unit designed for the purpose of changing the at least one setpoint value of the controlled variable as a function of the operating parameter.

Abstract: A control device for a vehicle brake system, having a control device/arrangement by which a closing signal is outputtable to an isolation valve via which a first brake circuit is hydraulically connected to a main brake cylinder, and at least one first control signal is outputtable to at least one first hydraulic component, so that a first actual brake pressure in the first brake circuit can be varied, an existing functional impairment of the at least one first hydraulic component and/or of at least one further brake system component being determinable, or a warning signal being receivable, and, if warranted, a closing signal being outputtable to a changeover valve of a second brake circuit, and, after or simultaneously with an outputting of the closing signal to the changeover valve, an opening signal being outputtable to the isolation valve. Also described is a related method for operating the vehicle brake system.

Abstract: A method is described for compensation of an insufficient pressure buildup in the braking system of a vehicle in the event of a failure or malfunction of a brake booster for brake force support when an actuating element of the braking system is actuated, the compensation occurring with the aid of a unit for an additional pressure buildup in the braking system and triggering of this compensation occurring as a function of a position of the actuating element in its adjustment travel. An instantaneous position of the actuating element in the adjustment travel is ascertained continuously or periodically, and the triggering and the additional pressure build-up occur as a function of this ascertained instantaneous position. Also described is a corresponding compensating system.

Abstract: A method for activating a two-stage switching valve including a first stage which has a small flow cross-section and a second stage which has a larger flow cross section, the switching valve being situated between a main brake cylinder and a hydraulic pump in a hydraulic brake system. The pressure equalization knock on opening the switching valve is substantially reduced by activating the switching valve in a first control phase via a control signal having a low amplitude, due to which only the first stage of the valve is first opened, and by activating the valve in a second phase via a control signal having a higher amplitude.

Abstract: A device for determining the saturation point of a vacuum brake booster having a vacuum chamber and a working chamber that are separated from one another by a membrane. The reaching of the saturation point can be recognized simply and precisely if the vacuum prevailing in the vacuum chamber is measured using a pressure sensor, and the output signal of the pressure sensor is evaluated by an electronic evaluation system that calculates the saturation point using a mathematical function, taking into account only the pressure prevailing in the vacuum chamber.

Abstract: A device for determining the saturation point of a vacuum brake booster having a vacuum chamber and a working chamber that are separated from one another by a membrane. The reaching of the saturation point can be recognized simply and precisely if the vacuum prevailing in the vacuum chamber is measured using a pressure sensor, and the output signal of the pressure sensor is evaluated by an electronic evaluation system that calculates the saturation point using a mathematical function, taking into account only the pressure prevailing in the vacuum chamber.

Abstract: A method for activating a two-stage switching valve including a first stage which has a small flow cross-section and a second stage which has a larger flow cross section, the switching valve being situated between a main brake cylinder and a hydraulic pump in a hydraulic brake system. The pressure equalization knock on opening the switching valve is substantially reduced by activating the switching valve in a first control phase via a control signal having a low amplitude, due to which only the first stage of the valve is first opened, and by activating the valve in a second phase via a control signal having a higher amplitude.