Robert Boschgmbh

Other

Markus Ketterer

Juergen Foerster

Achim Guenther

Klaus-Juergen Wald

Bernhard Eisele

Juergen Stein

Uwe Schiller

Ulrich Bentel

Rolf Kraemer

Hubert Bischof

Walter Gollin

Sebastian Maass

Lothar Puettmann

J&uuml;rgen F&ouml;rster

Udo Niessner

Achim G&uuml;nther

A method for sealing a coolant chamber () of a bipolar plate () of a fuel cell (), the fuel cell () having at least one membrane-electrode unit () and the bipolar plate () having a first bipolar plate half () and a second bipolar plate half (), at least one of the bipolar plate halves () having a coolant distributing structure () and the coolant chamber () that is formed at least by the coolant distributing structure () being formed between the bipolar plate halves ().

Fuel cell and method for sealing a coolant chamber of a bipolar plate of a fuel cell

A device and a method for bidirectional single-wire data transmission of data information between an electronic control unit and at least one peripheral unit. A predefined constant voltage and/or a predefined constant current is applied to a driver device of the electronic control unit to produce voltage-coded and/or current-coded information. The voltage-coded and/or current-coded information is transmitted from the driver device of the electronic control unit to a driver deviceof the peripheral unit via a single-wire line. At least the driver logic of the driver device and/or the communication logic of the peripheral unit are triggered and powered through the current flow. Information occurring on the peripheral unit is current-coded and/or voltage coded due to the triggering thereof. The current-coded and/or voltage-coded information are uploaded from the driver device of the peripheral unit to the driver device of the electronic control unit during the triggering of the peripheral unit via the same single-wire line.

Method and device for bidirectional single-wire data transmission

A device and a method are described for bidirectional single-wire data transmission of information between a control unit and at least one peripheral unit, having the following steps: generating a first current flow from the control unit to the peripheral unit during first time slots via a single-wire line to transmit voltage-coded or current-coded information from the control unit to the peripheral unit; and/or generating a second current flow from the peripheral unit to the control unit during second time slots via the single-wire line to upload voltage-coded or current-coded information from the peripheral unit to the control unit; the first and second time slots being implemented so they do not mutually overlap; and/or generating, in the first and/or second time slots, additional information to be transmitted and/or uploaded, which is transmitted as digital or analog signals by modulating the current or the voltage of the single-wire line and is analyzed in the control unit or the peripheral unit.

A method is presented for positioning a measurement window in time for analysis of ionic current signals, detected at internal combustion engines via the electrodes of a spark plug, for an ignition system having an ignition transformer, e.g., a.c. ignition or in a capacitor ignition system or inductive transistor ignition or inductive coil ignition or inductive coil ignition having a limited spark duration, the ignition systems being combined with a measurement device for an ionic current at the secondary winding on the ground side, each spark plug being allocated one ignition transformer, and the detection of the end of a spark and the opening of the measurement window for the ionic current signal taking place as a function of the end of the spark.

Method and device for positioning measuring displays for measuring ion currents

A device and a method for detecting phase in four-stroke engines, in which an electronic control unit (ECU) detects a spark current as a measuring signal and determines whether ignition occurred for ascertaining the compression cycles of the cylinders, whereby the electronic control unit is able to cause the injection to be performed in a correct phase relation.

Method and device for phase recognition in a 4-stroke Otto engine with ion flow measurement

A method and an arrangement for detecting combustion misfires in internal combustion engines are presented where a measured ionic current signal is subjected to a floating short-time integration and a feature is formed which corresponds to the maximum value of the floating short-time integrator within the entire measuring window. The window length of the short-time integrator is shorter than the total measuring window and is floatingly displaced over the measuring window.

Method and device for evaluating ionic current signals for assessing combustion processes

An inductive ignition apparatus for a combustion engine includes a measurement device for ascertaining the ionization current at the spark plug of each cylinder, and includes for each spark plug an ignition coil device which forms the ignition high voltage, operates on the transformer principle, and has a primary and a secondary winding, and through whose secondary winding the ionization current flows. A switch is provided which short-circuits the primary winding for the duration of the ionization current measurement.

Igniting system with a device for measuring the ion current

A method and an arrangement for energy control on an ignition system for an internal combustion engine are presented having an ignition coil or an ignition transformer whose primary winding can be short circuited by means of a switch, called a short-circuit switch, the ignition coil forming the ignition voltage and having a primary winding and a secondary winding, and, an ion current can be measured with the secondary winding of the ignition coil by means of one or several spark plugs, the primary current in the short-circuit phase of the short-circuit switch is detected with a suitable means and is transmitted to the control unit, the measurement quantity is processed in the form of a function or filtering in the control unit after actuation of the short-circuit switch and an energy control via closure time or closure angle is built up with the obtained feature.

Method and device for regulating power in ignition systems with a primary-side short-circuiting switch

A method for processing the ion flow signals of internal combustion engines by offset correction, masking and multiplexing for engine control functions wherein, after the measurement of the ion flow signal in each cylinder for the purpose of offset correction in advance of each ignition operation, the level of the measurement signal of the cylinder is detected; during masking operation, the measurement signal is substituted in a second signal by the level value and is subtracted from the second signal until the next ignition operation and thereafter, the channels which are to be multiplexed, are combined to a third signal by the addition of the second signals of the particular cylinders, the second signal being derived from the measurement signal.

Method and device for determining the ion flow in internal combustion engines

A resonance transducer ignition system for an engine includes a voltage source, a semiconductor circuit-breaker, a resonance capacitance, an energy recovery diode, an open- and closed-loop control unit, a spark plug and an ignition transformer. The resonance capacitance is part of a first resonant circuit. A second resonant circuit is composed of a secondary capacitance. The secondary capacitance is composed of a spark plug capacitance and a stray capacitance. The two resonant circuits are coupled to one another via the ignition transformer, the coupling coefficient, k, being &gt;0.65.

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Stuttgart, Germany

Markus Ketterer