Abstract: A system for controlling fuel metering into an internal combustion engine, in particular a self-igniting internal combustion engine, is described. An electromagnetic valve influences the beginning and/or the end of fuel metering. An inductive pressure sensor is provided, which generates a signal corresponding to the pressure in a high-pressure area.

Abstract: A method and a device for driving an electromagnetic consumer (device) which includes a movable element, in particular a solenoid valve for metering fuel into an internal combustion engine. Within a timing window, a switching instant is determined by evaluating the time characteristic of a variable which corresponds to the current flowing through the electromagnetic consumer. A clocked voltage control is provided within the timing window.

Abstract: A system for controlling a motor vehicle includes a first device for determining control data required for controlling the motor vehicle. A second device monitors the first device. The first device determines second data on the basis of first data, pursuant to a test function. The second device determines third data on the basis of the first data, pursuant to the same test function. The first and/or the second device recognizes an error state relevant to safety, dependent upon a comparison between the second data and the third data.

Abstract: A pulse shaper for inductive pickups, in particular for inductive speed pickups or angle of rotation pickups on internal-combustion engines, is proposed, which has a voltage controlled voltage divider (14, 17, 19) at its input. A level adaptation takes place of the signal delivered by the inductive pickup (10) to a Schmitt trigger stage (44), at the output (57) of which a voltage jump occurs whenever the signal delivered by the pickup (10) rises above a certain value and falls below a certain value. The voltage divider at the input of the pulse shaper is formed by a resistor (14) and a first and second diode (17, 19), the differential resistance of which can be set by controlled voltage sources (24, 28). The special advantage of the circuit is that no higher voltage than the operating voltage of the pulse shaper can occur after the resistor 14 at the input. The pulse shaper is ideally suited for integration, as only easily integratable components are contained in the circuit.

Abstract: To increase the versatility of a central processing unit (30) controlling an operating apparatus, such as apparatus including an engine, installed in an automotive vehicle, a main read-only memory (ROM, 40) stores not only operating data of the vehicle and/or the engine, but additionally, the organization program of the central processing unit (CPU, 30) in modular, or block form in the ROM (40). An auxiliary ROM (41) preferably an electronically erasable ROM is connectable, via an interconnection bus (80) to the CPU (30) and an initial program stored in the main ROM (40) provides a determination or recognition step to be carried out by the CPU (30) first, to determine if the auxiliary EPROM (41) is present; and, if so, to then address the auxiliary EPROM (41) for control of the program run of the CPU; if not, to take programming operating data directly from the ROM (40).

Abstract: To prevent change of data in a non-volatile programmable, ready-only memory (25) forming, together with a microprocessor (23) a control unit, for example for an automotive vehicle, while permitting programming of the memory from an external programming unit (P, 1), an interface (3, 11, 12) is provided through which a release-enable bus (13) also passes, data being transmitted in accordance with a predetermined characteristic--even or odd parity--, the parity correctness being checked. If the parity is correct, an "enter" signal is provided on the release-enable bus for storing the data; if not, retransmission is attempted for a predetermined number of time, and if it cannot be correctly effected, a malfunction indication output signal is generated.

Abstract: A pulse shaper for inductive transmitters, in particular inductive crankshaft angle transmitters on internal combustion engines is suggested, wherein a Schmitt-trigger is connected with the output of the transmitter. A peak value detector (D1,C) is connected with the output of the transmitter and means are provided which set the trigger threshold of the Schmitt-trigger in dependency on the output of the peak value detector.