Abstract:
A method and a device for an adaptive forward feeding of a disturbance correcting signal in a regulator is based on storing an output signal from the regulator at a first time point t.sub.0 corresponding to the occurrence of a disturbance. At a later time point t.sub.1 when the disturbance has been settled by the regulator, a second output signal from the regulator indicative of the final integration level is compared with a stored signal and the difference signal is processed and combined with a constant disturbance correcting signal, thus producing another an adapted disturbance correcting signal which minimizes the deviation from a desired magnitude and at the input of the regulator. The processing of the adaptive correction signal at the output of the comparator is preferably made by an integration according to a preset formula of a plurality of differences produced from a plurality of forward switching actions before the second time point t.sub.1. The averaged adaptive correction signal is then applied at the time point t.sub.1 to a summing device where it is added to the constant disturbance correcting signal.
Abstract:
An idling regulation system for an internal combustion engine is proposed, in which preferably the air throughput in the intake tube is regulated in accordance with the deviation between the set-point and actual rpm values, the temperature, and the like. In this manner, the air leakage of the throttle valve, for instance, is additionally detected in an idling regulation system, via a bypass final control element.
Abstract:
A method and an apparatus for controlling at least one throttle cross section in a control line, in particular in a line carrying operating medium for an internal combustion engine, such as an air bypass around the throttle valve of the engine. The apparatus includes an electric control motor, by means of which a throttle device having a circular-segmental control section can be rotated. The control section is rotatable in a control opening intersecting the control line, and the control line and control opening are connected with one another by a throttle opening which has limiting faces. When the control motor is not excited or if the control motor should fail, the control section is rotated by a spring element against a stop, into a position in which a control edge together with the limiting face opens a first throttle cross section, which is sufficiently large to supply the engine with a sufficient quantity of air for the prevailing situation.
Abstract:
An etched metal membrane has its rim laser-welded or electron-beam-welded to a ring made of the same kind of metal within which a central electrode is held by a metal-to-glass seal. The welding is done in vacuum to avoid the necessity of later evacuation. The pressure sensor capacitance thus formed is connected through an impedance converter to an oscillator circuit which provides an output frequency that varies with the sensed pressure. The inner surface of the central electrode is flush with the surface of the rim to which the membrane is welded to reduce variations in capacitance of the sensor, and any residual variations are compensated by a resistance balance in the evaluation circuit. The insensitivity of the system to temperature and its service life make it suitable for sensing the intake air pressure of an internal combustion engine.
Abstract:
A flow rate meter for measuring the flow rate of a fluid medium, especially that of the air aspirated by an internal combustion engine. A hot wire or film is placed in the air stream and is made part of an electrical circuit powered by the output of a differential amplifier. The voltage drop across the resistor is monitored at the input of the differential amplifier where it is compared with fixed or compensated values. In order to reduce the effect that airborne particles, which are deposited on the hot wire or film, have on the measuring characteristics of the apparatus, the wire or film are shaped so that their leading edge constitutes an area much smaller than the surfaces which are substantially parallel to the stream lines.
Abstract:
A drive for a hood on a motor vehicle, in particular an engine hood, which is movable between a closed position and a lifted position that is abruptly achieved in the case of an accident. The drive comprises a drive unit having an electric drive motor and being effective between a vehicle structure and the hood. The drive motor moves the hood into the lifted position in the case of an accident.
Abstract:
A housing for an electronic monitoring device on a vehicle part such as a lead accumulator comprises a metallic, load-bearing baseplate and an injection molded, generally parallelepipedal housing body encapsulating the baseplate. The baseplate projects out of the housing body on at least one side with a cantilevered attachment section.
Abstract:
The driving device has a rotatable drive disc (16) that is coupled to a motor (10) and, arranged coaxially with the drive disc, a locking disc (20) that can be rotated to a limited extent relative to the drive disc. The locking disc has detent teeth on its outer circumference. A pawl (30), is pivotally mounted on a stationary axis. The drive disc (16) is provided with a recess (28) on its outer circumference. The outer circumference of the drive disc extends radially beyond the tips of the detent teeth. The recess has a bottom of approximately the same radial depth as the gaps of the detent teeth. Together with the outer circumference of the drive disc (16), the recess (28) forms a cam on which the tip of the pawl (30) slides.
Abstract:
A park brake system for vehicles is provided that has an actuator with an electric drive motor and an electronic control unit provided with an interface. A reduction gear has an input connected to the output of the electric motor and an output member for connection to mechanical brakes of the vehicle. A command unit has a transducer connected to the electronic control unit. The transducer converts position indication signals into appropriate digital signals to enable the control unit to generate corresponding brake control commands. With appropriate control signals from the electronic control unit, the mechanical brake system can thus reflect positional brake commands from the command unit within an operating range from OFF to ON, including partial activation conditions of the park brake.
Abstract:
The automotive electric power supply includes a rechargeable battery and a distributor comprising an input for one battery terminal and several outputs furnishing the battery voltage for various consumers. Arranged between the input for one battery terminal and the outputs are semiconductor switches driven by a digital controller. The controller has an input interface for sensor signals representing operating parameters. The power supply is smart in ensuring that electrical energy is furnished to the various consumers in the vehicle only as required.