Robert Boschgmbh

Karl Ott

Klaus Walter

Helmut Denz

Immanuel Krauter

Joachim Strate

Ernst Wild

Michael Lehner

Wolfgang Borst

Joerg Fuchs

Uwe Kiencke

Ruediger Weiss

Ulrich Flaig

Gunter Honig

Alfred Schulz

Thomas Schneider

Martin Zechnall

Winfried Klotzner

Ingo Gorille

Ernst-Olav Pagel

Gerd Grass

Rudi Mayer

Heinz Moller

Michael Walther

Gunther Kaiser

Ulrich Mayer

Peter Kaltenbrunn

Klaus Boettcher

Martin Person

Reinhard Palesch

Bernhard Schray

Joachim Heimes

Helmut Binder

Dietmar Flaetgen

Peter Klee

Juergen Wuerth

Hans-Peter Strobele

Erwin Schmuck

Alfred Bruckelt

Lilian Kaiser

Jurgen Eckhardt

A method and a device for detecting the phase of a four-stroke gasoline engine, a gasoline direct injection engine in particular. For reliable phase detection involving relatively little expense during a starting phase, a crankshaft is turned together with at least one piston; ignition is triggered via an ignition coil in at least two successive top dead centers of the piston without a supply of fuel. A primary current or a secondary current, or a primary voltage or a secondary voltage are measured in a measuring period which extends at least over a spark duration after the ignition. From the comparison of the measuring signals of successive ignitions, a conclusion is drawn as to which of the successive top dead centers is an ignition top dead center and which is a charge cycle top dead center.

Method and device for detecting a phase of a four-stroke gasoline engine

An ignition system for an internal combustion engine, which has at least two cylinders, having a detection device for detecting the misfirings occurring at each cylinder, and having a calculation device which, for each cylinder, has at least one associated misfiring counter that, in response to a misfiring detected in the cylinder in one revolution of the internal combustion engine, is increased as a function of the total number of misfirings in all cylinders detected in the preceding revolution.

Ignition system and ignition control method

The invention is directed to a method of starting an engine for internal combustion engines of a motor vehicle driven by gasoline direct injection with the engines being subdivided into several cylinder banks and a high pressure injection system being provided for each cylinder bank. During a first phase (A), an injection into the cylinders of a first cylinder bank in correspondence to their normal ignition sequence takes place and no injection is carried out in the cylinders of the remaining cylinder banks. In a subsequent second phase (B), injection takes place also into the cylinders of the other cylinder bank or banks.

Method for starting an internal combustion engine having several cylinder banks and being operated with gasoline direct injection

The invention is based on a system for changing a signal representing rotational motion in a motor vehicle with first means for generating a first signal representing the rotational motion and a second means for generating at least one second signal representing additional information (direction of rotation, air gap, and/or brake lining wear). In addition, a third means is provided, by means of which the first signal (rotational speed signal) can be changed as a function of the second signal (direction of rotation, air gap, and/or brake lining wear). The essence of the invention is that the first means is designed in such a way that the first signal (rotational speed signal) assumes at least two first current values and/or two first voltage values. In addition, the third means is designed in accordance with the invention in such a way that, to change the first signal (rotational speed signal), at least one of the first current values and/or voltage values can be changed at least for a certain period of time into at least one second current value and/or voltage value as a function of the second signal (direction or rotation, air gap and/or brake lining wear).

System for changing a rotational speed signal

The arrangement for contactless determination of an angular position of a rotatable element, such as a camshaft of an internal combustion engine, which includes a magnet arranged to rotate with the rotatable element; a magnetic field sensor stationary in relation to the rotatable element and including a first sensor element (IC,) and a second sensor element (IC,), wherein the first sensor element generates a first output signal linearly dependent on an angle between the magnetic field and the magnetic field sensor according to a magnetoresistive effect, whereby the first output signal has respective values between 0&deg; and 180&deg; that repeat between 180&deg; and 360&deg;, and the second sensor element generates a second output signal having a high value between 0&deg; and 180&deg; and a low value between 180&deg; and 360&deg; according to a Hall effect; and an evaluation circuit (A) for analyzing output signals of both sensor elements to determine the angular position of the rotatable element between 0&deg; and 360&deg;. The evaluating circuit finds that the absolute angular position is either of two angular orientations spaced 180&deg; from each other only from the signal from the first sensor element and selects one of them as the absolute angular position according to the second output signal.

Non-contact system for detecting an angle of rotation

The invention is directed to a method for detecting and documenting damage to a catalytic converter in a motor vehicle having a fuel tank and an internal combustion engine wherein combustion misfires can occur when the level of fuel in the tank drops below a critical level. The method includes: detecting the level of fuel in the tank utilizing a fill-level sensor device; utilizing a circuit arrangement to determine when the level in the tank reaches the critical level and switching on a warning lamp to indicate that the critical level has been reached; storing a value corresponding to the critical level and the operating state of the warning lamp in a memory as a first set of data; detecting misfires of the engine and storing information as to the misfires in the memory as a second set of data; and, logically combining the first and second sets of data when the misfires are present at the same time as the critical fill level so that a determination can be made in the context of a later read out of the logically coupled data as to whether the misfires are associated with a level of the fuel corresponding to the critical level.

Method and arrangement for detecting and documenting damage to a

For detecting a backward revolution of a revolving component of an internal combustion engine, with a sensor which senses a revolving component having at least one angular mark, the backward revolution is assumed when a prescribable value between two pulses of the signal of the sensor is exceeded, and stalling is detected after it is ensured that the backward revolution of the internal combustion engine has taken place, and outputting of further injections and/or ignitions is suppressed until a resynchronization of the system takes place after a prescribable time has passed.

Device for and a method of detecting the backward revolution of a

Device for controlling the fuel injection in an internal combustion

Device for recognising the angular position of a rotating part

Sensor arrangement for rapid cylinder detection in a multi-cylinder

Transmitter arrangement for cylinder identification in an internal

Device for detecting the position of at least one shaft which has a

Device for monitoring the functon of an electric load, its drive and the

Method and apparatus for controlling the torque of an engine

The invention relates to ignition circuit monitoring in an internal combustion engine, where a sensor signal is generated in the course of each ignition by an ignition current sensor (5), which is supplied via a pulse shaper (6) to a memory unit (7). An ignition computer (4) reads out the contents of the memory following each ignition or each sensor signal and resets the memory unit (7) prior to the next ignition. Thus, when the sensor signal is missing, the ignition computer (4) detects the lack of ignition and an appropriate control signal is made available for control actions.

Ignition circuit monitoring in an internal combustion engine

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Markgroeningen, Germany

Karl Ott