Robert Boschgmbh

Other

Horst Franke

Franz Rieger

Klaus D Muller

Winfried Moser

Ernst Linder

Helmut Maurer

Konrad Eckert

Cornelius Peter

Ferdinand Grob

Rainer Burkel

Eckart Damson

Klaus D M/u/ Ller

Markus Engel

Eckard Damson

An electromagnetic actuator is disclosed. The actuator has a coil arrangement which can be excited electrically, and has an armature. The armature is mounted such that it can move axially in the coil arrangement, is composed of soft magnetic material, and is moved in the axial direction when the coil arrangement is excited. A guide sleeve is fixed in the coil arrangement and guides the armature in the axial direction. The guide sleeve is produced from a soft magnetic material.

Electromagnetic actuator and operating arrangement for operation of a valve arrangement

Disclosed is a method and device for regulating the preparation of fuel-and-air mixture in a carburetor, fuel injection system and the like of an internal combustion engine. The device includes an oxygen probe directly communicating with the combustion chamber of the engine. Periodically fluctuating output signal of the probe is applied to an averaging circuit which produces an average output signal over a predetermined number of engine cycles. The shape and length of the averaged output signal is indicative whether the mixture ratio is lean or rich. The averaging can be made by means of a lowpass filter, an integrator or at least one counter counting in response to the angular position of the crankshaft or the predetermined time intervals. When the probe output voltage has the form of a hump or bulge, its length or area is used for determining the actual .lambda. value in the rich range of ratios of the mixture.

Method of and device for regulating fuel-and-air mixture supplied to an

Method for recognizing irregular combustion processes in an internal

To permit individual evaluation of the combustion processes in the respective cylinders (1a-d) of an internal combustion (IC) engine (2), individual optical pick-ups (3a-d; 4a-d) are coupled to the respective cylinders, the output signals either in optical or electrical form are conducted to separate pick-ups for individual evaluation or, alternatively, the output signals are combined and then again separated out by a steering circuit. Individual evaluation can be accomplished by locating light guide fibers from the sensors in a predetermined position with respect to opto-electrical transducers; by forming scanning windows, for example by a rotating disk (19, 20) rotating n in synchronism with the engine and permitting passage of light from the respective fibers of the light guides to respective pick-ups; or by combining the light outputs from the respective sensors (4) either optically by intermixing light guide fibers in a common cable (6'), or electrically in an equivalent OR-circuit (FIG. 8: R.sub.L) with subsequent correlation of the output signal with a specific cylinder by a scanning disk (FIG. 6: 20) with suitably placed openings (22a-d) therein, or an electrical time-multiplex steering circuit (FIG. 8: 30) operating in synchronism with rotation of the engine.

Combustion monitoring system for multi-cylinder internal combustion

To determine proper operation of a combustion sensor, and to normalize the output signals derived from a pick-up having a window exposed to the combustion chamber (10) by compensating for soiling, contamination, and loss of transmissivity of the window due to combustion residue, soot, or the like, a reference light source is provided introducing reference light of a predetermined level to the pick-up, for example when no light is generated due to combustoin events. In an internal combustion (IC) engine, the reference light can be energized during stopped condition of the engine, or during portions of the stroke of the engine when no combustion event takes place. Output signals from the pick-up are applied to a variable amplification factor amplifier, the amplification factor of which is first calibrated with a clean light source, and then continuously recalibrated or normalized with respect to its original calibration by changing the amplification factor in accordance with electrical signals derived from sensing of the reference light, so that the actual sensing light will be normalized with respect to the reference. The calibration, itself, can be variable and account for external factors, such as aging or decrease of light output of the light source. The reference light can be introduced by an externally operated incandescent filament or by shining light into a portion of a tubular housing, for example through a glass light guide, and reflecting the reference light into the sensing window which also senses light due to combustion.

Optical combustion sensor system

A method is proposed for regulating the combustion of operating mixtures in the combustion chambers of internal combustion engines. The course of the light intensity of the light resulting from combustion in the combustion chamber is detected and evaluated over the course of combustion; reference control variables derived therefrom are formed for use by subsequently disposed closed-loop control devices of the engine.

Method of regulating combustion in the combustion chambers of an

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Lochgau, Germany

Horst Franke