Robert Boschgmbh

Gunter Brand

Harald Kalippke

Hartmut G Brammer

Richard Gerber

Karl Ehrmann

Peter Werner

Helmut Maurer

Gunther Plapp

Dieter Gunther

Erhard Renninger

Otto Glockler

Adolf R Fritz

Jorg Issler

Claus Ruppmann

Gerold Grimm

Ulrich Mayer

Karl-Heinz Adler

Harald Sailer

Friedrich Jaki

Herbert Magdefrau

Reinhold Kaufmann

Uwe Kroger

Hans-Ulrich Gruber

Eugen Kielbas

Rolf Rink

Wolfgang Lolhoffel

Device for controlling at least one throttle cross-section at a control

The control generator of an ignition distributor for a transistor-coil ignition comprises an annular coil (55), a rotor (54) and a stator, which is a riveted unit comprising a stator plate (18), a permanent magnet (17) and a pole disc (56). The rotor and the pole disc are molded elements of sintered iron or of a mixture of sintered iron powder and carbonyl iron powder having a binder of thermosetting resin. The rotor and the pole disc have cooperating pole teeth (59,51), which are directed parallel to the axis (60) and whose cross section is triangular, with the triangular tips oriented toward one another. These 'pointed teeth' produce a more steeply inclined signal course, as a result of which a decreased inherent shifting of the inductive transducer, and thereby more reliable starting of the engine, are attained.

Ignition distributor for internal combustion engines

To provide an inherent delayed effect of spark trigger pulses derived from a magnetic transducer in which a salient pole piece of a rotor rotates with respect to a salient pole piece of a stator and, upon juxtaposition, a pulse is induced in a pickup coil magnetically coupled to the rotor-stator circuit, the rotor pole piece is formed to have an arcuate length greater than that of the stator pole piece, with stepped configuration so that, with respect to angle of rotation, the output voltage derived from the coil will have, after passing through zero or null, a half wave which has a portion (C) of decreasing rate of change of absolute value, or differential thereof, and a subsequent and adjacent portion (D) of increasing rate or differential of absolute value with respect to angular change with the sign of the differential remains the same, so that, on slow-speed operation, a trigger circuit set to respond only to the subsequent or adjacent portion will have a voltage induced therein only at a later time, that is, after the rotor has rotated to an angle beyond top dead center (TDC) position, upon high-speed operation, however, the curve portion immediately following the passage through zero or null already providing an output voltage sufficient to trigger the threshold circuit. The rotor can fit into all existing rotor structures, requiring only a modification of the shape of its salient pole piece.

Inductive signal source for internal combustion engine ignition system

To provide an easily manufactured ignition distributor in which two bearings support the distributor shaft, the lower bearing is molded or otherwise secured into the housing structure, whereas the upper bearing is supported on a transversely extending support member, typically a support plate which is seated within the housing, for example bearing against a shoulder, against seating lugs, or the like, so that the entire ignition distributor structure can be constructed with small compact size.

Ignition distributor construction for internal combustion engines

To match the wear and flattening of ignition breaker contacts to wear of the engagement element of the breaker contact arm with the breaker cam, the engagement element is made of polyimide, preferably sintered polyimide with, possibly, an additive of from 10 to 20% of a lubricating substance, for example about 15% graphite (by weight).

Internal combustion engine electric ignition breaker contact structure

Growing community of inventors

Stuttgart, Germany

Gunter Brand