Abstract: A method for the determination of combustion misfires in an internal combustion engine having a plurality of cylinders, there being provision, for determining at least two successive compression times and expansion times for at least one cylinder of the internal combustion engine, for the determination of combustion misfires a comparison of the change in the compression times with the change in the expansion times being carried out, and the result of the comparison being a measure of a combustion misfire.

Abstract: A method for transmitting data for a security device, in particular for access authorization systems and/or driving authorization systems of a motor vehicle, in which data are transmitted over the air from a transmitter unit to a receiver unit. In a method in which, despite contactless interrogation of the identification signal transmitter, an authorizing access information item cannot be obtained by a third party, the data are transmitted, after capacitive coupling of the transmitter unit and receiver unit, from the transmitter to the receiver using a signal which is generated by a capacitive alternating field.

Abstract: The invention specifies a navigation or multimedia system in which a check is carried out to determine whether a user of files, such as roadmap data, is authorized to use these files. To this end, the navigation system has means for checking authorized use of files on the bulk storage medium on which the files are stored. The files are stored in encrypted form, in particular. In accordance with an inventive method for enabling the use rights on a file, provision is made for the user to enter a first and a second scrambled code (PIN and ACW) into the navigation system first. These codes are converted into vectors. A device identifier ID of the navigation system and the first scrambled code PIN are first used to calculate a key k. The key k and the second scrambled code ACW are used to calculate an access authorization identifier AC, which is compared with the access authorization identifiers for the files stored on the storage medium.

Abstract: Method for producing an electrical connector connecting between a first and a second mating contact partner, wherein at least one contact partner is surrounded by a plug housing. The first and the second contact partners are lead with latching means together to form a plug-in electrical connection in the plug housing. Laser-welding is applied to the first and the second contact partners to make the connection an integral, non-detachable connection, by directing a laser beam through a single opening in the plug housing.

Abstract: The invention relates to a strain-sensitive resistor, comprising a resistance layer arranged on a support element and an electromechanical transducer produced with this resistor. An increase in the electrical measured signal picked off across the resistor is achieved in a simple way by the support element (1) having a recess (7) on its surface (9) which, when the support element (1) is subjected to mechanical stress in at least one area of the surface (9) of the support element (1) in which the resistance layer (4) is positioned, produces a ratio between the two main strain directions (L, T) of the resistance layer (4) which differs in magnitude.

Abstract: In a device for actuating a security device, preferably for securing a motor vehicle against unauthorized use, in which a control unit transmits a first coded electromagnetic signal (stimulus signal), in which a portable transmitter (radio key) receives the stimulus signal and transmits a second coded signal (enable signal), and in which the control unit is connected to the security device and actuates the latter if the enable signal is received and recognized, both the control unit and the radio key can after the carrier frequency of the coded electromagnetic signals. During signal transmission, this frequency is altered in a manner which is known only to the control unit and to the radio key.

Abstract: In a color head-up display, in particular for vehicles, in which the light from a light source (2) is transmitted through an at least partially light-transmitting display (3) and can be projected onto a windshield, a multiplicity of red, blue and green light-emitting diodes are arranged without packaging on a common support, and that a heat-dissipating device for cooling the light-emitting diodes is present.

Abstract: In a display unit for a motor vehicle, a display designed as an LCD is arranged in the same plane as a dial plate of a pointer-type instrument. For this purpose, the dial plate has a cutout into which the display is bonded. This makes the display and the dial plate particularly easy to read.

Abstract: A method for enabling use rights on a file, which is stored on a storage medium together with at least one other file and is provided with an identifier, for use by a single computer system or by a limited number of local computer systems, wherein a central station calculates a first and second scrambled code PIN and ACW containing a key k, for decrypting the files stored in encrypted form, and a device identification number ID. The device identification number ID is changed with each new enabling operation. Once the two scrambled codes have been entered into the computer system, the computer system first calculates a new device identification number ID from stored data and uses this new device identification number ID and the first scrambled code PIN for the key k and uses the key k and the second scrambled code ACW to calculate an identifier AC for the file which is to be enabled.

Abstract: A system for operating a door lock (14) and a latching device (16), which can be arrested in a positive-locking manner, of a sliding door (10), said latching device preventing the sliding door (10) in its open position from sliding back. The operation of the door lock (14) and latching device (16) takes place mechanically via connecting elements, and the logical closing functions, are integrated in the door lock (14) which is situated remote from the door handles. In order to avoid very long connecting elements with cumulative tolerances, the connecting elements (22, 24) between the door handles and the door lock (14) have driver elements (40, 42) which act via a driven element (32, 44) on a connecting element (28) connected to the latching device (16).

Abstract: A device for displaying pictograms in a vehicle wherein the device comprises a control unit and a display unit, in particular an LCD display unit, the control unit controlling the display unit, and a method for operating the device, wherein a) the display unit is divided into symbol fields (2, 3, 4, 5, 6) which are arranged one next to the other in a row, the control unit only ever displaying one pictogram in each symbol field simultaneously, b) the control unit always displays in a specific symbol field (2) each new pictogram which is to be displayed in the symbol fields (2, 3, 4, 5, 6) which are arranged one next to the other in a row, and displaces by one symbol field the pictograms which have already been displayed, without changing their order, c) a control element (13) is provided with which a coherent section of the pictograms which are arranged one next to the other in a row can be displayed in the symbol fields of the display unit if more pictograms are to be displayed simultaneously than symbol fie

Abstract: A method for modulating a basic clock signal for digital circuits, in which distances between adjacent switching edges are altered, the basic clock signal being conducted via a changing number of delay units for altering the distances between the adjacent switching edges, the method comprising the step of calibrating delay times of the delay units (D1-Dn), wherein the delay units (D1-Dn) each have a plurality of delay elements (10) which are controlled to impart zero delay or a non-zero value of delay to a clock signal individually or in groups of the display elements; wherein the respective distance between two adjacent switching edges is derived from numbers of a random number generator; and wherein the distance between two successive switching edges is derived as a function of the random number and a modulation factor.

Abstract: The invention relates to navigation systems for motor vehicles, in which route planning information is output via a monitor (3). Data records containing map data are stored in a storage element (5). According to the invention, the storage element (5) stores information regarding traffic restrictions which is part of a data record of the map data, and the traffic restrictions relevant to the ascertained vehicle position can additionally be displayed on the monitor (3). Furthermore, in one specific embodiment, time restrictions for traffic restrictions are likewise stored and only the traffic restrictions which are applicable at the present time are displayed.

Abstract: A valve for a fuel delivery unit has a counterholder pressed into a housing. A spring is supported on the counterholder and is intended for prestressing a closing part against a valve seat. The valve according to the invention can be fitted in a particularly simple manner.

Abstract: A navigation system is provided with various interlinked facilities, including a user I/O facility, a route planning facility and a position determining facility. In particular, the navigation system is arranged to physically interface to a data communication facility pertaining to organizer device. An embodiment of such system includes the navigation system arranged to signal actual route data to said organizer device for consideration in a preexistent timetable or diary context. Such system is preferably characterized in that said organizer device is arranged to signal actual diary or timetable data to said navigation system for consideration in a preexistent or future route scheme context.

Abstract: A method of producing a strain sensitive resistor includes matching an area of a film insulating layer to a shape of a recess in a surface of a support element. The film insulating area is applied to the support element so that the area of the film matching the shape of the recess is congruent with the shape of the recess. A resistive layer comprising strain-sensitive resistors is applied to the film insulating layer and the film insulating layer and the resistive layer are applied to heat treatment.

Abstract: An overvoltage protection device for an electronic apparatus having a plug-in device which has at least one plug-in element and is designed for insertion into a housing of the electronic apparatus. In overvoltage protection in which there is no need for any additional shielding measures from the electronics, a protection board which has a spark gap in order to dissipate overvoltages is arranged on the plug-in element.

Abstract: A ventilation device for a fuel tank includes an antisurge element designed as a porous component manufactured from sintered plastic. The antisurge element prevents fuel which is sloshing around in the fuel tank from penetrating into an activated carbon filter of the ventilation device. The antisurge element is a fixed component that does not require any movable parts and is produced particularly cost-effectively.

Abstract: In a steering booster device, a torque-sensor shaft being provided between a first shaft carrying the steering wheel and a second shaft connected to the gear of the steering booster, at least one end of the torque-sensor shaft is supported flexibly in the first or second shaft by at least one damping element.

Abstract: An apparatus for activating and/or deactivating a security device, particularly an entry device for a motor vehicle, having a portable transmitter unit for wirelessly transmitting a coded information item which is received by a receiver apparatus and is compared with a prescribed coded information item, the receiver apparatus being capable of outputting an actuation signal to the security device if the two coded information items match, and wherein the codes of the transmitter unit and the receiver apparatus can be updated in terms of the currently coded information items to prevent unauthorized use of the motor vehicle.