Robert Boschgmbh

Helmut Reum

Iwan Komaroff

Ernst Imhof

Gunther Schmid

Werner Grunwald

Kurt Schmid

Thomas Frey

Ernst Linder

Werner Herden

Karl-Hermann Friese

Klaus D Muller

Helmut Maurer

Walter Benedikt

Gerhard Heess

Bernhard Kaczynski

Rainer Bone

Rudolf Nagel

Jurgen Schmatz

Bernward Boning

Franz Sellmaier

Siegbert Schwab

Gerhard Auwarter

System for injecting fuel into combustion chambers of an internal

Surface-gap spark plug for internal combustion engines

Apparatus for injecting fuel into combustion chambers

An apparatus for the injection of fuel into combustion chambers, in particular of self-igniting internal combustion engines, having an injection nozzle (10) and a subsequent glow body (20), which has a conduit (30) surrounded by heatable walls (26) and serving for the passage therethrough of the injected streams. At least one lateral opening (32) discharges into this conduit (30), the opening preferably communicating with a region (46) of the combustion chamber (36) remote from the core region of the ignition. The air aspirated through the lateral opening (32) warms up and enters into the peripheral zone of the injected streams, where the result is an air-fuel ratio and temperature conditions which are very favorable for ignition. Less heat energy is required to initiate the ignition than in the known apparatus of this general type. By eliminating the conventional glow plugs, which interrupt the movement of air in the combustion chambers, increased power is attained and the emission of soot is reduced sharply.

Apparatus for injecting fuel into combustion chambers of internal

Apparatus for injecting fuel into a secondary flow of combustion air

A light guide element, secured in a spark plug-like housing and positioned, for example, within a metallic tube forming a spark plug connector, is coated at the end facing the combustion chamber with a light-impervious material viz: graphite, the graphite emitting radiation upon influence of heat arising within the combustion chamber, which radiation is transmitted to the optical pick-up for subsequent photo-electric evaluation thereof. The optical pick-up is, for example, a quartz glass rod coupled to a light guide cable, or directly coupled to an opto-electrical transducer.

Optical combustion event sensor structure particularly knock sensor for

To provide for improved cleaning of an optical combustion sensor, particularly to determine knocking in an internal combustion (IC) engine, a pick-up element made of glass, glass-coated or covered metal or the like, and, for example, hollow inside and filled with a vaporizable and condensable medium to define a heat pipe, has a sensing end portion which is formed with a mushroom-shaped enlarged head (14). The unit may be combined with the functions of a spark plug by extending a conductor therethrough, making the pick-up of electrically conductive glass or ceramic, placing a metal foil or other conductor at the outside, separated from the metallic housing by an insulating sleeve or the like.

Optical combustion sensor, particularly for use with internal combustion

Growing community of inventors

Stuttgart, Germany

Helmut Reum