Abstract: A method having a safety sensor and a safety sensor having at least one first evaluation unit having a first evaluation program, and at least one second evaluation unit having a second evaluation program. A two-channel system is formed with each evaluation unit being connected to a respective random access memory, and with each evaluation unit having a respective program memory, with a bidirectional communication channel being arranged between the evaluation units. A cross-comparison of the evaluation results can be carried out between the evaluation units, with a user program being able to be stored in at least one of the two program memories and/or in one of the two random access memories, with at least that evaluation unit which executes the user program having a memory protection device which is configured to restrict memory access of the user program to a defined memory region within the random access memory.

Abstract: A method having a safety sensor and a safety sensor (SIS), comprising at least one first evaluation unit (A) having a first evaluation program (FWA) and comprising at least one second evaluation unit (B) having a second evaluation program (FWB), whereby a two-channel system (2KS) is formed, with each evaluation unit (A, B) being connected to a respective random access memory (RA, RB), and with each evaluation unit (A, B) having a respective program memory (FSA, FSB), with a bidirectional communication channel (KK) being arranged between the evaluation units (A, B), whereby a cross-comparison of the evaluation results can be carried out between the evaluation units (A, B), with a user program (PA) being able to be stored in at least one of the two program memories (FSA, FSB) and/or in one of the two random access memories (RA, RB), with at least that evaluation unit (A, B) which executes the user program (PA, PB) having a memory protection device (SSE) which is configured to restrict memory access of the user

Abstract: A sensor system includes at least one safety sensor unit for monitoring a safety relevant zone of a plant. The sensor system also includes a display unit connected to the sensory unit or integrated into it. The sensor system outputs a safety switch signal on an intrusion of an unpermitted object into the monitored, safety relevant zone and the safety sensor unit has an input interface for receiving a further safety switch signal. The input interface can be configured such that, on the one hand, it can receive the further safety switch signal and, on the other hand, can also receive external, non-safety relevant signals of an external device. The display unit is designed to display internal state data of the sensor system and information resulting from the external non-safety relevant signals.

Abstract: A double-clutch transmission having at least three and preferably four, hydraulic shift cylinders, and a control device to actuate the hydraulic shift cylinders. To improve the speed of operation when selecting a gear, the shift cylinders needed for gear shifting are actuated with the aid of at least three electromagnetically shiftable directional valves.

Abstract: A sensor system includes at least one safety sensor unit for monitoring a safety relevant zone of a plant. The sensor system also includes a display unit connected to the sensory unit or integrated into it. The sensor system outputs a safety switch signal on an intrusion of an unpermitted object into the monitored, safety relevant zone and the safety sensor unit has an input interface for receiving a further safety switch signal. The input interface can be configured such that, on the one hand, it can receive the further safety switch signal and, on the other hand, can also receive external, non-safety relevant signals of an external device. The display unit is designed to display internal state data of the sensor system and information resulting from the external non-safety relevant signals.

Abstract: A hydraulic pressure reservoir having at least one pressure chamber formed between two opposed, movable inner boundary members. Each inner boundary members includes a spring cover and a diaphragm spring. An outer boundary member peripherally surrounds the movable inner boundary members and has a U-shaped cross section along at least a part of its periphery to axially support the diaphragm springs in a fixed axial position. The outer boundary member can be formed in several pieces that are held together by interconnections or by a surrounding outer tensioning member.

Abstract: A clutch control device for controlling the operation of a hydraulically operated clutch with a flow control valve. The control device includes a volume flow regulating valve that enables both volume flow regulated filling and volume flow regulated emptying of a hydraulic clutch positioning element, to provide rapid and precise operation of the clutch.

Abstract: A process and device for the currentless referencing of a clutch position in non self-locking clutch actuating systems which are switched without current for a first predetermined, passive period of time or until an actuator standstill occurs, in order to verify a clutch reference position, then the clutch position achieved is determined by first measurement and current is supplied to the clutch actuating system for a predetermined, active period of time, the clutch actuating system being then switched again without current for another predetermined, passive period of time or until an actuator standstill occurs, the clutch position being determined by another measurement; finally the measured clutch position is checked to determine whether it can be verified as a new clutch reference position.

Abstract: A clutch control device for controlling the operation of a hydraulically operated clutch with a flow control valve. The control device includes a volume flow regulating valve that enables both volume flow regulated filling and volume flow regulated emptying of a hydraulic clutch positioning element, to provide rapid and precise operation of the clutch.

Abstract: Valve with a rotary slide. The rotary slide comprises a conduction chamber, which is connected to a first infeed and can optionally be connected to one of a plurality of outlets by changing the rotational position. The rotary slide is designed so that the when pressure is applied the area ratios ensure that a partial pressure equalization always takes place.

Abstract: A double-clutch transmission having at least three and preferably four, hydraulic shift cylinders, and a control device to actuate the hydraulic shift cylinders. To improve the speed of operation when selecting a gear, the shift cylinders needed for gear shifting are actuated with the aid of at least three electromagnetically shiftable directional valves.

Abstract: A dual clutch transmission comprising a first clutch (16), which is hydraulically actuated by a first hydraulic cylinder (19), and a second clutch (18), which is hydraulically actuated by a second hydraulic cylinder (20), in addition to a plurality of hydraulically actuated shift cylinders (11, 12, 13, 14) for shifting gears, which can be subjected to pressure (p1, p2) by means of a selector valve arrangement (51), wherein the first hydraulic cylinder (19) and the second hydraulic cylinder (20) and the selector valve arrangement (51) are connected to a pressure side of a pressure device (24, 25, 26, 27, 28) by means of safety valves (52, 53, 54), which are actuated in unison.

Abstract: A hydraulic pressure reservoir having at least one pressure chamber formed between two opposed, movable inner boundary members. Each inner boundary members includes a spring cover and a diaphragm spring. An outer boundary member peripherally surrounds the movable inner boundary members and has a U-shaped cross section along at least a part of its periphery to axially support the diaphragm springs in a fixed axial position. The outer boundary member can be formed in several pieces that are held together by interconnections or by a surrounding outer tensioning member.

Abstract: A process and device for the currentless referencing of a clutch position in non self-locking clutch actuating systems which are switched without current for a first predetermined, passive period of time or until an actuator standstill occurs, in order to verify a clutch reference position, then the clutch position achieved is determined by first measurement and current is supplied to the clutch actuating system for a predetermined, active period of time, the clutch actuating system being then switched again without current for another predetermined, passive period of time or until an actuator standstill occurs, the clutch position being determined by another measurement; finally the measured clutch position is checked to determine whether it can be verified as a new clutch reference position.

Abstract: A method for operating a motor vehicle after receiving an acceleration signal in which the motor vehicle power train includes first and the second torque transmission devices connected to first and second subgears. The operational method includes selecting and engaging a predetermined target gear in one of the two subgears and selection and engagement of a predetermined intermediate target gear, in the other of the two subgears, while the power train continues to remain engaged. The intermediate target gear is so chosen that it will be higher than the target gear, so that the rpm of the gear input shaft of the target subgear, will be greater than the rpm of the gear input shaft of the intermediate target subgear, in which the current gear is engaged.

Abstract: A device for detecting the position of a hydraulic piston-cylinder system, where the hydraulic piston-cylinder system is connected to a position-detecting means which comprises a magnet and a Hall sensor and the connection between the hydraulic piston-cylinder system and the position-detecting means comprises a lever.

Abstract: This invention relates to a method for operating a motor vehicle after receiving an acceleration signal in which the motor vehicle power train includes first and the second torque transmission devices connected to first and second subgears. The operational method includes selecting and engaging a predetermined target gear in one of the two subgears and selection and engagement of a predetermined intermediate target gear, in the other of the two subgears, while the power train continues to remain engaged.