Bayerische Motoren Werke Aktiengesellschaft

Robert Boschgmbh

Ngk Spark Plug Company, Limited

Telefunken Electronic Gmbh

Johannes Guggenmos

Alfred Krappel

Josef Holzmann

Wataru Matsutani

Junichi Kagawa

Willy Minner

Adolf R Fritz

Robert Tschuk

Michael Gottschick

Georg Buchholz

An ignition unit for internal combustion engines with an ignition coil having a ferromagnetic core integrated with a spark plug connector, about the main core of which is arranged a primary winding and a secondary winding surrounded by an insulating body; the ignition coil and the spark plug connector are so arranged to one another that the axial directions of the spark plug connector and of the main core of the ignition coil form at least approximately a right angle.

Ignition unit for internal combustion engines

The outer or side electrode of a spark plug is configured as a flat plate confronting the center electrode to define a gap, and fixed to the threaded shell or body of the plug by a plurality of spider legs. A plurality of holes are formed in the plate to improve the plug durability and retard any discharge voltage increases.

Spark plug with counterelectrode having plural apertures in flat portion

The invention relates to an electronically controlled ignition system in which a correction signal is obtained from a control signal derived directly from an ignition pulse sensor. The invention consists of producing a saw-tooth signal with a rising flank and a falling flank within one cycle of the square wave control signal, using only one flank of the said control signal. The ratio or relationship between the gradients of the two flanks is a measure of the change in the corrected signal relative to the control signal. The electronically controlled ignition system is particularly suitable for compensating for the ignition advance, caused by an induction sensor, as compared to the mechanical position of the rotor at low engine speeds.

Electronically controlled ignition system

Ignition system for internal combustion engines

The operation of the interrupting switch in the primary circuit of an ignition coil triggers a first timing circuit having a fixed interval or one sometimes modified by engine loading, at the end of which a timing interval signal is generated which lasts for a second interval. The latter is applied to switch a resistor across the timing wave generator to load down its output voltage. In this manner, an engine equipped with a simple ignition shift providing spark advance in the low speed region and then steady or slightly retarding timing thereafter, can be caused to provide a retarding priming shift that sets in at a medium speed, increases and then tapers off with higher speeds so as to cover a speed range in which the engine is particularly sensitive to engine knock and avoiding the inefficiencies which would be necessary if the simple ignition shift system had to be backed off to avoid intersecting the knock boundary. It is also possible to utilize the first timing interval to charge or discharge a capacitor to produce an engine speed signal for biasing the threshold of the interrupter switch for control of the dwell angle with respect to engine speed. Two timing intervals can be determined by a single digital counter reset by each ignition pulse and connected with a decoder set to recognize the ends of successive intervals.

Engine ignition system with anti-knock timing shift

Growing community of inventors

Dirlewang, Germany

Johannes Guggenmos