Abstract:
A system and method for preventing a flame out condition in at least one engine, includes detecting a moisture content exceeding a threshold moisture content in an operating environment of the at least one engine, and engaging at least one igniter associated with the at least one engine in response to the moisture content.
Abstract:
A hand-held power tool comprising an internal combustion engine (4), a working tool (6), a centrifugal clutch (8), and a control system (10) is disclosed. The engine (4) has a clutch-in speed, above which the engine (4) drives the working tool (6). The control system (10) comprises a rotation speed sensor (12), and a speed limitation controller (14), which is configured to limit an engine speed at a limitation speed below the clutch-in speed. It is active or activated during a starting procedure of the internal combustion engine (4). The control system (10) is configured to deactivate the speed limitation controller (14) upon sensing at least one acceleration at a level above the limitation speed and sensing at least one deceleration at a level above the limitation speed, such that the engine (4) is rotatable above the limitation speed to drive the working tool (6).
Abstract:
Die Erfindung betrifft ein Verfahren zur Überprüfung einer Versorgungsschaltung (10) für mindestens einen Zündkreis (20, 30), welche mindestens einen Energiespeicher (C), eine erste Konvertierungsschaltung (5), welche eine Versorgungsspannung (UB) auf einen vorgegebenen Spannungspegel (VUP) anhebt und den mindestens einen Energiespeicher (C) lädt, und eine ansteuerbare Entladeschaltung (16) umfasst, welche den mindestens einen Energiespeicher (C) bei Bedarf entlädt, wobei der Energiespeicher (C) über eine erste Koppeldiode (D1) mit dem mindestens einen Zündkreis (20, 30) verbunden ist, und wobei die Versorgungsspannung (UB) über eine zweite Koppeldiode (D2) an den mindestens einen Zündkreis (20, 30) angelegt ist, sowie eine Versorgungsschaltung (10) für mindestens einen Zündkreis (20, 30) und eine korrespondierende Zündkreisanordnung (1) mit einer solchen Versorgungsschaltung (10). Erfindungsgemäß bleibt mit Systemstart bis zum Abschluss einer Versorgungsspannungsüberprüfung eine ansteuerbare Ladeschaltung (12) deaktiviert und trennt den mindestens einen Energiespeicher (C) von der ersten Konvertierungsschaltung (5), wobei nach Systemstart ein Ladungszustand des mindestens einen Energiespeichers (C) ermittelt und mit mindestens einem vorgegebenen Schwellwert verglichen wird, wobei in Abhängigkeit des mindestens einen Vergleichs eine fehlerfreie Versorgungsschaltung (10) oder mindestens ein Fehler erkannt wird.
Abstract:
This internal combustion engine (10) has an ignition device (12) that ignites an air-fuel mixture more forcefully than a spark discharge in a combustion chamber (20), wherein the discharge of unburned fuel is reduced and the fuel economy of the internal combustion engine (10) is improved. The internal combustion engine (10) is provided with an internal combustion engine body (11) with the combustion chamber (20) formed therein, and the ignition device (12) that ignites the air-fuel mixture in the combustion chamber (20) more forcefully than a spark discharge, as well as an electromagnetic-wave radiation device (13) that radiates, from an antenna (41), electromagnetic waves supplied by an electromagnetic-wave oscillator (32). The electromagnetic-wave radiation device (13) radiates electromagnetic waves from the antenna (41) and forms an electric field that increases the propagation speed of a flame.
Abstract:
The present invention relates to a method for controlling an ignition system of an internal combustion engine which has a primary firing pulse generator for charging a capacitor and an electronic switch for discharging the capacitor via an ignition coil to generate an ignition voltage. A microcomputer operates the switch to control the ignition timing of said generator, said microcomputer having speed detection means to directly or indirectly detect the rotational speed of the engine and a speed limitation control to limit the engine speed to a limitation speed below the clutch-in speed of a centrifugal clutch. In the present invention the speed limitation control is active or activated when starting the engine and being deactivated when said speed detection means detects a low speed state of the engine.
Abstract:
Proposed is an internal-combustion engine ignition system with a control device (19), designed to control at least one output stage (Z), and with means for suppressing cut-in sparking. The ignition system includes voltage-controlled switches (181, 18n) connected one to each output (A1 ... An) of the control device (19) and which switch all the outputs (A) of the control device (19) to earth (13) until the voltage (VCC) reaches the value necessary to supply the control device (19).
Abstract:
The invention relates to a method for shutting down a two stroke crank case scavenged engine, the engine operating speed ranging form an idle speed to a maximum speed, said method comprising the steps of: a) activating a stop switch (33) of the engine (1); b) detecting a stop event from the activated stop switch (33); c) stopping the fuel supply to the engine in response to said stop event; d) adopting a stop ignition threshold being less or equal to a delay period (t2-t1), said delay period at idle speed being within the range of 100-1000 ms, and e) if the stop switch (33) is activated until the stop ignition threshold is reached after the detected stop event, then stopping the ignitions after the delay period (t2-t1) has elapsed from the detected stop event; or f) if the stop switch is deactivated before the stop ignition threshold has been reached after the detected stop event, then resuming fuel supply to the engine. The invention also relates to a two stroke crank case scavenged engine for implementing the method.