Abstract:
A belt retractor for a vehicle safety belt comprises a frame, a belt spool which is rotatably arranged in the frame, and a drive motor which can cooperate with a drive wheel which is coupled with the belt spool. The retractor further comprises a locking catch and locking teeth into which the locking catch can be guided in order to lock the belt spool. The drive wheel is rotatable relative to the belt spool to a limited extent and the locking catch is controlled as a function of this relative rotation.
Abstract:
A seat belt retractor has a retractor frame, a belt spool rotatably mounted in the frame, an electric drive motor, a reduction belt gear with a toothed belt connecting the electric motor permanently with the belt spool, and a winding spring functionally arranged between the frame and the belt spool, permanently biasing the belt spool with a winding moment. The electric motor is controlled to either counteract or assist the winding spring.
Abstract:
The invention relates to a housing for an electronics unit, especially for an airbag control device, whereby at least the metal walls of the housing are provided with a moisture repellent coating. The inventive housing is made of bent and interconnecting sheet metal elements which are extrusion-coated with plastic on at least one side.
Abstract:
A sensor unit is described, in particular an air quality sensor, having a first support element, on which are arranged a first sensor element and a first heat source, assigned to the latter, and having at least one further, second support element, on which are arranged a second sensor element and a second heat source, assigned to the latter. The two support elements are configured as a common support unit and, between them, have a heat barrier for thermal isolation.
Abstract:
Circuitry, particularly for function modules that can be fitted in a motor vehicle and can be connected to a voltage supply and/or a control circuit. A central unit (12) is provided that includes at least one circuit arrangement (16, 36) for all of the function modules (22, 24, 26, 28, 30, 32, 40, 42, 44, 46, 48, 50, 52, 56, 58, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 96, 98), for conditioning voltage and/or control signals to be used by the modules; the central unit (12) is connected to the function modules, and the function modules are connected among themselves, by a bus system (62, 66). Moreover, the control unit (12) is coupled to a driver information module (40) by mechanical connections.
Abstract:
A protective device for electric motors for protecting electric motors from high operational temperatures, has an element for determining an operational temperature of an electric motor and an element for automatically switching off of the electric motor when a predetermined limiting operational temperature is exceeded. The determining element is formed as electronic element for determining the operational temperature indirectly from an at least another operational parameter of the electric motor. The element for automatically switching off is formed as electronic element for automatically switching off of the electric motor.
Abstract:
A monitoring device for an electronic accelerator pedal (1) in a motor vehicle has an accelerator pedal position sensor (2) mechanically connected to the accelerator pedal (1), a butterfly valve (7), a servo-motor (5) for the butterfly valve (7) and a butterfly valve position sensor (6) mechanically connected thereto. A regulator (3) receives a desired value (.alpha.D) from the accelerator pedal position sensor (2) and an actual value (.alpha.A) from the butterfly valve position sensor (6) and controls an output stage (4) for the servo-motor (5) in response to the comparison. A subtractor (14) in a slave circuit (12) forms the difference (.alpha.E) between the desired (.alpha.D) and actual (.alpha.A) values of the butterfly valve opening angle. An integrator (16) integrates the control difference (.alpha.E) and is re-set to zero when the control difference (.alpha.E) is zero or changes sign, whereupon integration of the control difference (.alpha.E) is resumed. A limit device (18) indicates to a master circuit ( 10)the presence of a fault condition when the integrator output exceeds a predetermined limiting value.
Abstract:
In a device for controlling and regulating the current through an electric consumer with a bridge circuit, the consumer being located in one of its diagonals, four current control members of the logic level power MOSFET type are provided, a pair of voltage regulating circuits for the gate voltage supply and a pair of current control circuits for the gate voltage control being connected respectively, two of to the four current control members. Each of the voltage regulating circuits is assembled of a diode having its anode connected to a d.c. power source and to the collector of a N-P-N transistor and, via a resistor, to the base of the transistor and to the cathode of a Zener diode whose anode is connected to a terminal of the consumer. The emitter of the transistor is connected to the gate of the assigned current control member.
Abstract:
A device for the controlled metering of combustion air into an internal combustion engine is described which allows an emergency driving operation and prevents the throttle valve from freezing shut in a rest position in the event of a failure of the electric actuator at the throttle valve or a failure of the control or the current supply of same. The device provides for a restoring spring in permanent engagement with the throttle valve shaft and a pretensioned counter-spring in partial engagement with the throttle valve shaft, which restoring spring and counter-spring cooperate with an electromotive actuator.
Abstract:
A device that serves to actuate a throttle valve. The actuating device includes an electric drive motor and a step-down gear driven by the motor; an output shaft of the step-down gear is operatively connected to a throttle valve shaft which controls the throttle valve. The actuating device is compact in structure as well as versatile in use, even with various sizes of throttle valve, the step-down gear is embodied as a planetary gear having its output shaft provided with a gear wheel, which is operatively connected via a toothed belt with a second gear wheel, disposed on the throttle valve shaft. The motor is controlled by a control means assembled in the same housing as the motor and the throttle valve.