摘要:
An inductive ignition system for low powered internal combustion engines comprises a voltage generator (10) having a magnetic circuit (16) linked with an ignition coil (17,18) connected to a spark plug (CD). The voltage generator (10) periodically produces alternating voltage signals (VL) each comprising a first and a second half wave (S1,S2) of a first polarity, and an intermediate half wave (S3) of opposite polarity. The voltage signals are used in a differentiated way to supply a microprocessor (Q1) of an ignition control circuit (21), with event signals correlated to the polarities of the voltage half waves (S1,S2,S3), and to the rotational speed and direction of rotation of the engine. The microprocessor (Q1) is programmed to control the flowing of the current (IL1) through the primary winding (17) of the ignition coil (17,18) during the second voltage half wave (S2) of each voltage signal (UL), at the starting, and during the intermediate half wave (S3) during the running of the engine, to generate ignition sparks at differentiated advance angles.
摘要:
An engine ignition system includes a rotor (1A) that rotates in synchronism with rotation of an engine, an iron core (4A) fixedly disposed opposite the outer periphery of the rotor, and a primary coil (5) and a secondary coil (6) that are wound concentrically around the iron core. Permanent magnets (7A) are fitted to the iron core having a plurality of legs (8,9,10) opposite the outer periphery of the rotor (1A) at positions that are spaced in the peripheral direction of the rotor, and an inductor (2A) is fixed to the outer periphery of the rotor. The inductor forms a magnetic path for the magnetic flux that is formed by the permanent magnets (7A) between pairs of legs (8,9;9,10). The legs in a pair are adjacent to each other in the peripheral direction of the rotor, and the winding of the primary coil and the secondary coil around the iron core allows a spark plug to be energized every time the inductor passes the pairs of legs. The arrangement reduces the weight of the rotor while allowing the rotational balance of the rotor to be easily adjusted, simplifies the arrangement of the rotor itself, and secures an effectively usable space in the region on the inside of the rotor in the radial direction.
摘要:
An inductive ignition system for low powered internal combustion engines comprises a voltage generator (10) having a magnetic circuit (16) linked with an ignition coil (17,18) connected to a spark plug (CD). The voltage generator (10) periodically produces alternating voltage signals (VL) each comprising a first and a second half wave (S1,S2) of a first polarity, and an intermediate half wave (S3) of opposite polarity. The voltage signals are used in a differentiated way to supply a microprocessor (Q1) of an ignition control circuit (21), with event signals correlated to the polarities of the voltage half waves (S1,S2,S3), and to the rotational speed and direction of rotation of the engine. The microprocessor (Q1) is programmed to control the flowing of the current (IL1) through the primary winding (17) of the ignition coil (17,18) during the second voltage half wave (S2) of each voltage signal (UL), at the starting, and during the intermediate half wave (S3) during the running of the engine, to generate ignition sparks at differentiated advance angles.
摘要:
The system is intended for a motor-vehicle having an engine to which a magneto-flywheel generator (3) is coupled and which is adapted to be rotated by means of a pedal crank (2). The system (1) comprises:
a voltage supply terminal (6) connected to the output of the generator (3, 4) and to a storage battery (5), a dc/dc voltage converter (9) having a supply input (9a) connected to the terminal (6), and an enabling input (9b), a capacitive-discharge ignition circuit (11, 12) the input of which is connected to the output of the voltage converter (9) and the output of which is coupled to a spark plug (SP), a rotation sensor (14) associated with the generator (3), an ignition switch (15) connected to the terminal (6), a regulated direct-current voltage supply circuit (7) the input of which is connected to the supply terminal (6), and an electronic processing and control unit (ECU).
The voltage supply circuit (7) and the voltage converter (9) are connected to the supply terminal (6) by means of diodes (8, 10) and respective capacitors (C1, C2) in a manner such that, when the engine is started by means of the pedal crank (2), the energy supplied by the generator (3) is sufficient to enable the voltage supply circuit (7) to supply the regulated voltage for a predetermined minimum period of time and to enable the voltage converter (9) to store sufficient energy for the striking of at least one ignition spark in the engine. The processing and control unit (ECU) is arranged to implement an emergency engine ignition and starting procedure in which it enables the voltage converter (9) to operate in order to charge the ignition capacitor (12) and subsequently to strike a spark to start the engine.
摘要:
An ignition system with capacitive knocking ignition for internal-combustion engines, associable to an electric energy generating flywheel, that utilizes a capacitor (C1) discharge means (thyristor SCR) to generate a spark in one correspondent ignition plug (Ca), characterized by the fact that the secondary coil (Ls) has an end electrically connected to the feed coil (Ba) of said generator and an end connected to the ignition plug (Ca) in order to: first of all have a spark on the ignition plug (Ca) deriving from the discharge of said capacitor means (C1) on the primary winding (Lp), inducing tensions with high potential on said secondary winding (Ls) and then that such feed coil (Ba) of said electric energy generator sets provide furthermore and directly current to said secondary coil (Ls) to prolong the duration of the spark.
摘要:
A positive off and automatic on ignition stop switch and electronic circuit for use in an internal combustion engine. The circuit that allows for normal operation of the engine in an unbiased state. When it is desired to turn the engine off, a stop switch is triggered which provides a single mechanism for shutting off the engine. After the switch is activated, the circuit holds the ignition circuit in an off state for a sufficient amount of time to allow the engine to completely stop operation. The circuit holds the engine in the off state for a period of time even after the switch is deactivated. As a result, the operator of a piece of equipment in which the present invention is utilized can activate a switch one time, which results in the engine coming to a complete stop, without the requirement of further activity.
摘要:
An ignition control apparatus comprises: an overvoltage protection circuit (10) having a thyristor (11) connected to an input terminal (B), for preventing an overvoltage from passing to subsequent circuits by shutting off the thyristor (11) when an overvoltage is input thereto; a DC-DC converter (20A) having a field effect transistor (22) and a gate drive circuit (23A) for driving the gate thereof, connected in series to the overvoltage protection circuit (10), for stepping up and outputting the output voltage from the overvoltage protection circuit (10); a parallel connection section (50) comprising a diode (51) and a resistor (52) for connecting the input terminal (B) and the gate drive circuit (23A), but not through the overvoltage protection circuit (10); a capacitor (30) which is charged by an output from the DC-DC converter (20A); and a thyristor (40) for discharging an electrical load charged into the capacitor (30), in accordance with a trigger pulse from an external section.
摘要:
A capacitor (C1) of an ignition circuit (3) is charged by an output at a positive half cycle of an exciter coil (104), and the electric charge of the capacitor (C1) is discharged through a thyristor (Th1), whereby an ignition operation is carried out. When the level of a detected value (Vb) of the output voltage at a negative half cycle of the exciter coil coincides with the level of a reference voltage (Vr), a transistor (Tr4) is conducted so as to generate a reference signal. A measurement of an ignition timing calculated by a microcomputer is started at a reference signal generating position, and when an ignition timing is measured, an ignition signal is sent to the thyristor (Th1) to thereby start an ignition operation. The reference signal generating position is maintained constant by changing a reference voltage (Vr) in accordance with the output voltage and output frequency of the exciter coil.
摘要:
In an ignition system for an internal combustion engine of a motorcycle comprising an electric generator; an ignition circuit connected to the electric generator for producing a spark voltage for a spark plug; a battery having an end connected to the electric generator via switching means, and another end connected to the ground; and an electrical load connected in parallel with the battery, the switching means includes a voltage detector for detecting an output voltage of the electric generator, and a switching element for disconnecting the battery and the electrical load from the electric generator when the output voltage detected by the voltage detector is below a prescribed value. Because the electrical load and the battery are disconnected from the generator when the output voltage of the generator is below a prescribed value, the output voltage can go up to the prescribed value or higher which is sufficient for the ignition circuit to properly operate so as to produce a spark voltage for a spark plug, with the result that the internal combustion engine can be easily started by operating a kickstarter of the motorcycle.