Robert Boschgmbh

Hans Schrumpf

Georg Haubner

Jurgen Wesemeyer

Werner Meier

Gerhard Hettich

Hans-Dieter Schmid

Lothar Haas

Sonja Reitenspiess

Uwe Kiencke

Alfred Schulz

Gunter Honig

Manfred Schwab

Gunther Alberter

Dieter Eckardt

Klaus Neidhard

Berthold Walter

Kurt Metzger

Joachim Naser

Jorg Birmelin

Hans-Jorg Schmidt

Manfred Kamp

Sonja Polster

Helmut Deeg

An electromagnetic relay is designed so that it can be manufactured inexpensively and is based on a small unit size. The relay has a base group and a magnet system, it being possible to manufacture these separately and join them together as preassembled modular units. The base group has a base plate in which a component having a component wire is fixed in position. The magnet system has two flat pins each of which has a hole with a sharpened edge. When the magnet system is joined together with the base group, the flat pins are pushed into the base plate, in each case the edge at the wire component forming a contact created by an insulation displacement connection. The relay is preferably used in the automotive industry, especially if installation conditions are cramped.

Electromagnetic relay

The electrical switching apparatus includes a housing (10), a coil (20) arranged in the housing (10), at least two switch terminals (35,50,60) arranged in the housing (10), a magnetic angle piece (30) in the housing (10) including a core (32) for the coil (20) and an armature (42) resiliently mounted on the magnetic angle piece (30) for making electrical contact between two switch terminals (35,50,60). The magnetic angle piece is preferably made by a method including punching or stamping a nearly rectangular piece (39) from sheet metal, forming a U-shaped opening around a separately bendable tongue (32a) in a central region of the nearly rectangular piece (39) so that side pieces (30a) are formed on opposite sides of the U-shaped opening (38) and a connecting piece (31a) connects the side pieces (30a) on another end of the rectangular piece (39) opposite from one switch terminal; bending the separately bendable tongue (32a) at right angles to a remaining portion of the nearly rectangular piece (39) including the side pieces (30a) to form the core (32) of the coil (20) and bending the connecting piece (31a) at substantially right angles to form an upper portion (31) of the magnetic angle piece arranged substantially parallel to the core (32).

Electric switching device and method of making a magnetic angle piece

An arrangement monitors a consumer in combination with an internal combustion engine or motor vehicle especially for monitoring an electric drive which is driven by an output stage in the form of a bridge circuit. Potentials are compared in the area of the consumer or of the output stage to pregiven threshold values derived from the normal operation. From this comparison, an alarm signal is generated in a time-delayed manner with the time delay being dependent upon the magnitude of the drive signal.

Arrangement for monitoring a consumer in combination with an internal

Pressure sensor for determining tire pressure

Tire pressure sensor for motor vehicles

Detector of the inflation pressure of motor vehicle tires

Pressure sensor

In an ignition system for an internal combustion engine, a digital system for computing the timing advance is provided. Constants approximating the curve of timing advance v. engine speed are stored in a microprocessor. The positive half waves of primary current in the magneto generate the ignition energy and also generate a reference signal for controlling the actual ignition time. The sequence of reference signals is also used to generate a digital value indicative of engine speed. The latter is used to address the read only memory in which the constants for approximating the timing advance curve are stored. After each reference signal, the value read out from the read only memory is counted down by a counter. When the counter reaches the value of zero, ignition is started.

Digital ignition control for a magnetopowered ignition system of an

A disk mounted on a rotating shaft of an internal combustion engine has a signal generating segment which causes generation of a pickup signal having a leading and a trailing edge. The two different edges control different processes, as for example ignition processes of different ignition coils, fuel injection processes, or ignition processes during normal and starting operation. A basic counting value is counted down between two sequential edge signals in a counter. This is a speed-dependent value from which different countdown values for the next cycle are computed. To allow adjustment of the angle at which one process takes place without simultaneous adjustment of the angle at which the other process takes place, one or both of the edges of the segment from which the control signals are derived have slanted portions, so that movement of the pickup relative to the slanted portions will effectively cause a change in the angle at which a process is initiated.

Timing system for process control in internal combustion engines

In order to permit alternate transfer of different sets of data to a microprocessor over the same input/output lines, a coupling-decoupling circuit includes series-connected diodes and inverters. The input/output lines are coupled to a diode matrix which is scanned line-by-line and determines the transfer of a set of primary data in a first time interval during which the admission of supplementary data from secondary data lines is blocked. In a second time interval, the rows of the diode matrix are all placed in the same logical state while the supplementary data is admitted by the coupling-decoupling circuit to the same input/output lines which received the primary data.

Apparatus for data transfer to microprocessors

To supervise a program controlled device which is subject to stray noise or disturbance pulses, particularly microprocessor controlled automotive vehicle electronic systems, a timing circuit is provided responsive to check pulses added to the program and defining a timing interval, the monitoring system distinguishing between disturbance pulses and static defects by supervising the control pulses and, upon failure of the control pulses, generating a program restart or interrupt signal, respectively, which both initiate a new start of the program cycle or, respectively, define a timing interval which, upon failure to sense further control pulses, initiates energization of an emergency switching system. Continuous failure to receive control pulses also can initiate the emergency switching system. To permit start-up, and before control pulses are obtained, a time delay circuit is provided which disables the monitoring system upon switching ON of the program controlled device at least for the time period of one check pulse cycle.

Monitoring system for program controlled apparatus

In order to permit a simplification of the crankshaft rotation sensor device which provides the computer of the control system with angular speed and position information for ignition and/or fuel injection timing, a signal generated by one pickup for every two engine cylinders from a single reference mark on the crankshaft is formed into a signal pulse which is used to trigger the counting of clock pulses from a clock into a counter. These are then periodically transferred to a computer as a numerical signal which represents the required information. In a first mode the counts are transferred every other period between pulses and the counter counts in the cycle periods between the pulses in which the counter is not transferring to the computer. In a second mode, the counter counts every cycle between pulses and the counts are transferred during every pulse itself. There is also described a system which includes additional circuitry by which below a certain speed of the engine the system operates in the first mode and above that speed operates in the second mode.

Control system for control of repetitive events, e.g. ignition, fuel

An additional diode is provided in series with the charging diode through which the storage capacitor of a magneto ignition system is charged and the shutdown switch for the engine is connected between the common connection of the two diodes and the common connection of the magneto generator, and the capacitor diodes, because of their high back resistance, prevent any high positive or negative voltages from appearing across an open shutdown switch.

Capacitor type magneto ignition system with diode-protected shutdown

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Oberasbach, Germany

Hans Schrumpf