摘要:
A drive circuit for an AC ignition circuit, which has at least one capacitor and at least one trigger element, which is used to deploy a restraint system in a motor vehicle, has a bridge circuit with four electronically controllable switches, of which two switches are connected in series between a supply voltage and ground, and the ignition circuit forms a bridge shunt between both pairs of switches connected in parallel. If a fault occurs in the bridge circuit, the individual switches are triggered so that charging and discharging of the capacitor in the ignition circuit is guaranteed in spite of the fault.
摘要:
A firing element and a belt operating sensor are connected via a common wiring pair to a control unit. The belt operating sensor is either a mechanical switch, which is activated in response to the snapping of a belt tongue into the buckle, or it is composed of an electrically controllable switch, which is controlled by a magnetic-field-sensitive element, which reacts to a magnetic field that is influenced by a belt tongue that is inserted into the buckle. Only via a wiring pair can the control unit both diagnose the firing element as well as determine the operating state of the belt.
摘要:
A device for sensing a side impact in a motor vehicle, the side impact sensing being performed with a deformation sensor element which is attached on a sensor bottom plate, which is in turn mounted on a side part reinforcing element with riveted connections. A temperature sensor which is also present on the sensor bottom plate detects the ambient temperature in the side part and the deformation sensor delivers a static output signal to ascertain whether the riveted connections still have a predetermined mechanical strength. If the temperature measured by the temperature sensor exceeds room temperature, the static output signal of the deformation sensor is checked with the predetermined threshold value, and if it falls below this threshold value, a defect is detected.
摘要:
A simple device for reliably detecting at least one type of occupancy of the passenger's seat of a motor vehicle in which the passenger-side air bag must absolutely not be activated. A manually operated switch is provided, having at least one switch position assigned to a type of occupancy for which the passenger-side air bag must not be activated; a control unit is provided which deactivates the passenger-side air bag when the switch is not in this switch position; and an arrangement is provided to prevent the vehicle from driving away after the engine has been started unless the switch has first been operated.
摘要:
In the case of an electronic apparatus (1), a protective circuit (10) for positive and negative voltage spikes is provided, which circuit includes two diodes (12, 13). The first diode (12), polarized in the forward direction, is arranged in the positive branch of the voltage supply. The second diode (13), polarized in the reverse direction, is connected, on the one hand, to the cathode connection of the first diode (12) and, on the other hand, to the ground connection.
摘要:
An electronic device for triggering safety devices 10 comprises a firing element ZP which is connected in series to a capacitor ZK. The firing element ZP is acted upon by currents from controllable current sources IQ1, IQ2, which, in accordance with an output signal of a sensor S, are triggered by an evaluation circuit AS.
摘要:
An electronic device for protecting the passengers of a motor vehicle during a collision has an acceleration sensor for generating signals indicative of the deceleration of the vehicle. Switching devices are provided to determine whether the collision is a rear-end collision based on the output signals of the sensor. If a rear-end collision is detected, the electronic device prevents the release of one or more restraining devices, such as an airbag, which would not contribute to the protection of the passengers during such a collision.
摘要:
In a process for protecting motor vehicle occupants, the acceleration of the motor vehicle is determined and safety means which protect the motor vehicle occupant are activated when a specified limiting acceleration value is exceeded. To optimally release the safety means, the sitting position of the motor vehicle occupant and/or the relative velocity of the occupant with respect to the passenger cabin of the motor vehicle are determined by position sensor using measuring techniques. The safety means are activated when the sitting position of the occupant deviates from a nominal position and/or the relative velocity of the occupant exceeds a specified limiting value.
摘要:
The invention is directed to an apparatus for triggering passenger protection systems particularly restraining systems in vehicles during their impact. In the previous systems, there is the disadvantage that the protective systems are only triggered late or not at all during critical impact situations at relatively low negative accelerations. The disadvantage chiefly results because a differential signal is fed to the input of an integrator which comprises the difference between a signal derived from the acceleration and a constant threshold value signal. According to the invention, a variable threshold value is deducted from the derived acceleration signal rather than a constant threshold value.
摘要:
A voltage supply circuit has an energy reserve, which is charged by a voltage transformer, and a comparator circuit, which controls switching circuit components. When the supply voltage is at its nominal value, a first switching circuit component is closed, with the result, that the energy reserve is operated in open circuit and is charged by the voltage transformer. When the supply voltage drops below a threshold, the comparator circuit opens the first switching circuit component and closes a second switching circuit component with the result that, at this point, the charged energy reserve is available for the voltage supply to the circuit configuration normally supplied with voltage from the supply voltage and the voltage transformer is disconnected from the supply voltage.