摘要:
Ignition system for an internal-combustion engine, in particular for use in a chain saw or the like, comprising a magnetically conducting core (10) supporting a charging winding (21) and a triggering winding (22), a flywheel (14) having at least one magnetic field generating member (15) and adapted to cooperate with the magnetically conducting core (10) to cause, when passing, voltages to be induced in the windings (21, 22), and an electronic switch means (27) adapted to trigger, in response to a trigger pulse generated by the triggering winding (22), the discharge of a capacitor (26), which has been charged by a voltage generated in the charging winding (21), via the primary (18) of an ignition coil (17) the secondary (19) of which comprises a spark plug (20). The ignition system comprises an additional winding (37) which is provided and disposed so that during its normal rotational movement the flywheel (14) first passes said additional winding (37) before turning in over the legs (11, 12, 13) of the magnetically conducting core (10), the voltage induced in the additional winding (37) being used to prevent trigger pulses from reaching the switch means (27) if the direction of rotation of the engine is the opposite to the normal one.
摘要:
In a misfire detector device for use in internal combustion engine, an electrical interrupter circuit on-off actuates a primary current flowing through a primary circuit of an ignition coil to induce a sparkplug voltage which is applied to a multi-electrode type spark plug. A check diode or a series gap is provided in a secondary circuit of the ignition coil to prevent a current flowing back to the ignition coil. A sparkplug voltage detector circuit detects an attenuation time length of a sparkplug voltage waveform presented subsequent to a time period predetermined after an end of a spark action of the spark plug. On the basis of the attenuation time length, a distinction circuit determines whether a misfire occurs in a cylinder of an internal combustion engine.
摘要:
Système d'allumage pour moteurs à combustion interne comportant un circuit de contrôle (9) servant à déclencher les mesures d'urgence nécessaires en cas de ratés d'allumage, pour protéger le catalyseur. A cet effet, le système d'allumage comprend un disposif d'évaluation (10) qui soumet le signal de diagnostic de l'allumage (ZÜNDOK) à une pondération statistique et déclenche les mesures d'urgence nécessaires en cas de dépassement d'un seuil prédéféni de la valeur de diagnostic de l'allumage pondérée (ZÜNTAB). L'évaluation se poursuit de sorte qu'après sous-dépassement ultérieur du seuil de raté (AFSDZU) un rétablissement soit reconnu et que les mesures d'urgence soient levées.
摘要:
An ignition system for a combustion-powered tool is powered by a battery (12) and is arranged so that a sudden discharge of a capacitor (36) produces a spark at a spark gap (32) of a spark plug (30). An oscillator (38) for charging the capacitor (36) is enabled if a trigger switch (16) is closed while a head switch (14) is closed, but not if the trigger switch (16) is closed while the head switch (14) is opened, and if a battery voltage, as monitored, is not less than a reference voltage, and so that a silicon-controlled rectifier (44), which is arranged to produce a sudden discharge of the capacitor (36), is switched to a conductive state if the capacitor voltage, as monitored, and is not less than a reference voltage. The head (14) and trigger (16) switches, which are photo-electric, are polled intermittently to determine whether they are closed. Predominantly, solid-state components are used.
摘要:
Das Deckblatt (3, 5) eines Telefonregisters hat einen die schuppenartig angeordneten Sichtstreifen (9) der Registerblätter (7, 7') überdeckenden Abschnitt (13, 15), der an einer Perforationlinie (12, 1) abreißbar ist, um die Sichtstreifen der Registerblätter freizulegen. Der Abschnitt kann als Werbeträger, insbesondere als Werbeantwort-Postkarte ausgestaltet sein. Entsprechende abreißbare Abschnitte können auch an zwischen die Registerblätter eingefügten Einlegeblättern, oder sogar an Registerblättern selbst, vorgesehen sein.
摘要:
A system comprising: a first sensor (107) for detecting the teeth (134) and a gap in the same on a pulley (108) fitted to the drive shaft (111); a second sensor (112) for detecting interruptions (135 and 136), a first of which differs from the others, on a disk (109) rotating at half the speed of, but in time with, the drive shaft (111); first means (156), which, upon startup of the engine, compute and memorise the actual relative angular position of the pulley (108) and the disk (109); second means (152) for computing the absolute angular position of the drive shaft (111), for enabling the electronic ignition and injection systems; and third means (153) which, in the event of failure of the first sensor (107), and on the basis of the second sensor (112) and the signal processed by the first means (156), compute a presumed angular position of the drive shaft (111) for enabling the electronic ignition and injection systems.
摘要:
Die Erfindung betrifft eine Zündanlage für Brennkraftmaschinen, mit einem Kurbelwellengeber (KW-Geber), der je Kurbelwellenumdrehung eine einer bestimmten Kurbelwellen-Winkelstellung zugeordnete Bezugsmarke liefert und mit einem Phasengeber, insbesondere Nockenwellengeber (NW-Geber), der innerhalb zweier Kurbelwellenumdrehungen eine der Zahl der Zylinder der Brennkraftmaschine entsprechende Anzahl von der Nockenwellenstellung zugeordneten Phasensignalen erzeugt, wobei eines der Phasensignale zur Bildung eines Zyklussignals herangezogen ist, das den Beginn eines Zündzyklus' kennzeichnet. Um im bei Ausfall des KW-Gebers erfolgenden Notbetrieb stets eine sichere Zylinderidentifizierung (Zylinder-1-Erkennung) vornehmen zu können, ist zwischen einem ersten, einem bestimmten Zylinder (Zylinder 1) zugeordneten Phasensignal (PE) und dem diesen folgenden, benachbarten Phasensignal (P) ein Kennungssignal (K) gelegt, das zusammen mit dem zugehörigen ersten Phasensignal (PE) das Zyklussignal (Z) bildet.