Robert Boschgmbh

Other

Temic Telefunken Microelectronic Gmbh

Joachim Bauer

Otto Karl

Werner Nitschke

Johannes Rinkens

Michael Bischoff

Guenter Anton Fendt

Stefan Schaeffer

G&uuml;nter Fendt

Norbert Mueller

Stefan Schaefer

Richard Baur

Harald Kazmierczak

Günter Anton Fendt

Volker Breunig

Peter Steiner

Peter Bolz

Hans-Peter Lang

Katja Hambsch

Stefan Schäffer

Dietmar Koehler

Stefan Sch&auml;ffer

Micheal Bischoff

Guenther Ott

Rolf Krahmer

Klaus Albrecht

A device which guarantees reliable real-time operation of the restraint system and offers each occupant of the vehicle individually the greatest possible protection includes the fact that data processing units are provided, all having the same design and each being capable of controlling multiple restraint devices and can decide independently of other data processing units whether the restraint devices assigned to it are to be deployed.

Device for controlling restraint devices in an automobile using similarly constructed data processing units

An arrangement for generating digital signals on first and second bus lines is tolerant of most line faults, and includes modules connected to both lines, an upper switch between a first potential and the first line, a middle switch between the two lines, and a lower switch between the second line and a second potential lower than the first potential. The switches are controlled to generate digital signals as the potential difference between the two lines. If a fault potential (e.g. a short to ground or other potential) arises on one line, then the switches drive the non-faulty line to provide the required signals relative to the fault potential on the faulty line. Closing the middle switch ensures that the two lines are at the same potential for a low signal. This arrangement is for is signaling in various bus systems, e.g. in vehicle occupant protection systems in motor vehicles.

Signaling output stage for generating digital voltage signals on a bus system

A device for the wireless transmission of a tripping signal for a restraint system, a firing command from a firing bus being converted by a filter into a firing signal, which can be transmitted via an inductive or capacitative transformer. On the secondary side of the transformer, a regeneration device is arranged, which reconstitutes from the firing signal a firing command, which then is used to trigger a restraint system. The restraint system can be connected to a bus simulation, so that the driving electronics for the restraint system are the same as those which are connected directly to the firing bus.

Device for the wireless transmission of a tripping signal for a restraint system

The restraint system is composed of a central control unit, which is connected via a bus line to a plurality of data processing units each of which is intended to drive one or more restraint devices. To keep the restraint system operational if the power supply in the central control unit becomes defective, a changeover to the vehicle battery voltage as the new supply voltage is effected in the central control unit. The central control unit then signals the changeover to the new supply voltage to all the data processing units. All the data processing units thereupon adjust their circuits to the new supply-voltage level.

Method for operating a restraint system connected to a bus line during faulty power supply

An unintended triggering of a safety device, such as an airbag in an occupant protection system, especially in motor vehicles is prevented by storing already during manufacturing of the module or modules, a blocking information in a memory location of the module or modules. The blocking information is preferably temporarily stored in place of a rated information, which is then overwritten when the module has been installed in the protection system for activating the system. In addition, the module is protected against electromagnetic and/or electrostatic disturbances at the input to the bus system.

Control method and module for occupant protection systems with an action to prevent premature triggering

Information data and energy are transmitted from a central control to control modules through a bus system in an occupant protection system including occupant protection devices such as airbags. In order to avoid overloading the protection system due to an immediate recharging of an energy storage member after that member triggers an occupant protection device, such recharging is suppressed or interrupted, preferably until a reset command signal is received by the respective control module from the central control.

Method for transmitting power and data in a bus system provided for occupant protection devices

A central control unit and a plurality of data processing units are connected to a bus line and are provided to control restraint devices. The central control unit sends query signals or control signals in the form of data telegrams to all or certain individual data processing units and the data processing units send response signals back to the central control unit in response to certain query signals or control signals. To permit a reliable allocation of query signals and control signals to data processing units and reliable acquisition of monitoring data of data processing units and their restraint devices, the query signals or control signals and the response signals are data telegrams, all of which have the same frame structure, having a first region with n control bits, a second region with m information bits and a third region with p check bits.

Method for data transfer in a restraint system connected to a bus line

In the restraint system, a central control unit and a plurality of data processing units are coupled to a bus line, each of the data processing units being provided to activate one or more restraint devices. In order to keep the restraint system operational to the extent possible in the event of a short circuit, each data processing unit measures for short circuits on the bus line and starts timing if a short circuit is detected. Each data processing unit has a circuit breaker, with which the bus line can be closed or interrupted. This circuit breaker is opened if the short circuit measured is longer than a preset waiting time.

Method for operating a restraint system connected by a bus line in case of a short circuit

A device that is easy to assemble and not subject to wear has an induction coil in the seat back of the motor vehicle seat. This induction coil is inductively coupled to the guide rod of the head restraint that is movably supported in the seat back.

Device for transmitting signals to one or more circuits integrated into the head rest of a motor vehicle seat

In occupant protection systems having a large number of sensors and control modules for triggering occupant protection devices, the amount of wiring is significantly increased if they are to be communicatively connected to a central unit. For this reason, bus systems have already been suggested for the control modules for triggering occupant protection devices. In order to further reduce in the wiring, sensors are at least partially integrated into a bus system with additional control modules that are allocated to these sensors. Within the context of a diagnosis process of interrogation and response, which triggers a function test of the control modules for triggering the occupant protection devices, an actual sensor value is sent to the bus system from the control modules of the sensors as a diagnosis response. This response is processed by the central unit and/or the other control modules.

Occupant protection system having a central unit, sensors and a plurality of control modules which are connected by means of a bus system

A bus system with a master station and a plurality of slave stations is described. The slave stations have a connecting switch, with the downstream slave stations having no electric contact with the master station when the connecting switch of a first slave station is opened. In this phase, the first slave station is initialized. Before closing the connecting switch, a test switch is closed, with the current flow being limited by a current limiter. It is thus possible to check on whether the downstream slave station has a short circuit.

Slave station, master station, bus system and method for operating a bus

In the restraint system, in which coupled to a bus line are a central control unit and a plurality of data processing units that are provided to trigger restraint devices, a plurality of data channels that are clearly separable from each other are to be transmittable. In this context, data of high priority and high time-related urgency are transmitted with a high signal level and a high bit rate, data of lower priority and lower time-related urgency are transmitted with a low signal level and a low bit rate, data of high priority and lower time-related urgency are transmitted with a high signal level and a low bit rate, and data of a lower priority and high time-related urgency are transmitted with a low signal level and a high bit rate.

Data transfer method in a restraint system connected to a bus line

Before digital data impulses are transmitted from a transmitter to a receiver that includes a data acquisition signal generator, at least one synchronizing impulse (syn,) is transmitted for synchronizing the transmitter with the receiver with regard to a sync frequency that is repeatedly updated to provide a current accepted sync frequency. The at least one synchronizing impulse and the data impulses are Manchester encoded which combines timing (synchronizing) and data signals. An impulse flank change occurring centrally in an impulse width is used as a synchronization point of time. Stepping pulses occurring between two consecutive synchronization points of time are counted and the resulting count is used to determine the sync frequency in response to the occurrence of a synchronizing impulse and at a synchronization point of time. A time shift or delay occurs between data impulses and synchronization points of time. This delay is taken into account by a corresponding time shift in the scanning of the logic levels &ldquo;0&rdquo; and &ldquo;1&rdquo; of the data impulses. This type of signal transmission is especially suitable for a signal bus in a passenger protection system.

Method for transmitting digital data impulses

A bus system for the transmission of messages between a device and at least one peripheral unit is proposed, the messages being in each case transmitted via a sequence of high or low bit states. The control device can send high-priority messages and low-priority messages to the peripheral unit. The high-priority messages have a greater amplitude between the high and low bit states than the low-priority messages.

Bus system for data transfer

In a method for decoding digital PWM signal and a bus system, a peripheral unit, and a device therefor, the digital signal is decoded by integrating the pulse width of each bit and then comparing the integration result with a reference signal. The bus system includes dual wires, a device, and at least one peripheral unit. In an embodiment of the present invention, the bus system issued as an air bag system where diagnostic and deployment commands are sent via the bus wires to one or more peripheral units which control individual air bags.

Growing community of inventors

Oberstenfeld-Prevorst, Germany

Joachim Bauer