摘要:
A capacitor discharge ignition device for an internal combustion engine includes a booster coil 21 and a transistor 22 for generating a boosted voltage; a circuit 15A for generating a switching signal for the transistor in response to an ignition signal; first and second condensers 7, 8 for charging with the boosted voltage; an ignition coil 10 to whose secondary a spark plug is connected; a thyristor 13 forming a first closed discharge circuit with the first condenser and the ignition coil primary, which is turned on in synchronism with the ignition signal; and an inductor 9 forming a second closed circuit with the second condenser, the ignition coil primary and the thyristor. The discharge energy of the second condenser stored in the inductor is supplied to the ignition coil primary to extend the discharge time at the spark plug. A delay circuit 16 prevents the transistor from turning on during the extended discharge time, thus establishing a third closed inductor discharge path through the booster coil.
摘要:
An LCDI-type ignition apparatus for an internal combustion engine includes first and second capacitors connected to an ignition coil and a voltage source for generating a charging voltage for the capacitors. The first capacitor is for producing an initial discharge of a spark plug, and the second capacitor is for lengthening the discharge of the spark plug after discharge has been initiated by the first capacitor. In one form of the invention, the second capacitor is charged only after the first capacitor has been charged by the voltage source to a prescribed voltage sufficient to produce a suitable discharge of the spark plug. As a result, even when the engine is operating at a high rotational speed and the time between consecutive firings of the engine is small, an adequate ignition voltage can be obtained. In another form of the invention, the charging voltage(s) of one or both of the capacitors is or are varied in accordance with the one or more engine operating conditions. Each charging voltage can be controlled to the minimum necessary value based on the present engine operating conditions.
摘要:
A plurality of ignition coils and a plurality of switching assemblies are accommodated in one case, and a wire harness which interconnects the winding, connectors, and the switching assembly is formed as a unit using a plurality of conductors by means of a resin. In addition, respective electrical connections are established by welding, and soldering is disused. Thereby, it is provided an ignition device in which troublesome wiring between a coil and a switching assembly is eliminated and the reliability of electrical connections is improved, and which is compact and lightweight.
摘要:
Disclosed is an ignition apparatus for an internal combustion engine including a power switch 20 for intermittently feeding a primary current to an ignition coil, a primary coil 5 and a secondary coil 6 of the ignition coil being contained in an insulation case 1 with the power switch 20, primary coil 5 and secondary coil 6 being fixed by an insulating resin material 15 poured into the insulation case 1, the ignition apparatus comprising a shield plate 23 interposed between the secondary coil 6 and the power switch 20 to shield the power switch 20 from electromagnetic waves. With this arrangement, there can be obtained an ignition apparatus for an internal combustion engine by which the malfunction of the power switch and the like caused by electromagnetic waves generated at the ignition coil can be prevented.
摘要:
A capacitor discharging type ignition apparatus for an internal combustion engine is disclosed in which a secondary winding voltage rises quickly and has an extended spark generation time as well. The apparatus includes an electrical power source 101, an ignition coil 104 having a primary winding and a secondary winding connected to a spark plug, the primary winding having a first end terminal, a second end terminal and a third intermediate terminal between the first and second end terminals, a first capacitor 103a connected between the electrical power source and one of the first and second end terminals of the primary winding so that it is charged by the electrical power source; a second capacitor 103b connected between the electrical power source and the intermediate terminal of the primary winding so that it is charged by the electrical power source; a signal generator 105 for generating an ignition signal in synchronism with the rotation of the engine; and a switch 107 for causing the first and second capacitors to simultaneously discharge through the primary winding in response to the ignition signal of the signal generator.
摘要:
An ignition apparatus for an internal combustion engine is able to reduce generation of noise and energy loss due to wiring to a substantial extent. A capacitor 4 is connected at one end thereof to a DC power supply so as to be charged thereby, and at the other end thereof to an ignition coil 5. A switching element 9 is connected between the capacitor and a primary winding of the ignition coil to form part of a discharge path through which the capacitor discharges. The switching element is made conductive by means of an ignition or trigger signal which is generated by a signal generator in synchronism with the rotation of the engine, so that the charged capacitor discharges through the primary winding of the ignition coil. The capacitor, the ignition coil and the switching element are formed integrally with each other, housed in a single casing 13 and connected to each other without the use of a wire harness.
摘要:
An ignition coil for an internal combustion engine to suppress the superposition of a noise signal caused by a capacitive discharge current at an ignition plug to thereby prevent the faulty operation of other circuit devices. The ignition coil has first and second non-magnetic bobbins into which a magnetic core 3 is inserted, a primary coil (1) wire wound around the first bobbin, a secondary coil (2) wire wound around the second bobbin, an interrupting circuit 7 connected to one end of the primary coil for interrupting a primary current i1 flowing to the primary coil, and an ignition plug 5 connected to one end of the secondary coil for generating a discharge spark by a secondary voltage V2 output from the secondary coil. A buffer coil 8 having an inductance which is much smaller than that of the primary or secondary coil is connected in series with one of them.
摘要:
To provide a high tension connection portion structure for an ignition device for an internal combustion engine, which may prevent an instantaneous breakdown of the connection even if an external force is applied to a high tension connection portion, may enhance a connection property of the high tension connection portion by suppressing a sliding movement between metal terminals of the connection portion and may be applied to the path of a minute current such as an ionic current or the like, a connecting structure of a high tension connection portion used in an ignition device for an internal combustion engine, includes: a first high tension connection terminal 2; a second high tension connection terminal 4 for electrically connecting with the first high tension connection terminal 2; a locking mechanism 2a provided between the first high tension connection terminal 2 and the second high tension connection terminal 4 for restricting the separation therebetween in the axial direction; and a spring member 7 disposed between the first high tension connection terminal 2 and the second high tension connection terminal 4.
摘要:
An ignition device for an internal combustion engine including: a DC power source; a convertor for raising the voltage of the DC power source to a predetermined voltage; a charge storing device arranged to be charged with the output from the convertor; an ignition coil; an ignition signal generator for generating an ignition signal in synchronization with the rotation of the internal combustion engine; a switch which is switched on in response to the ignition signal generated by the ignition signal generator to discharge a charge stored in the charge storing device through the ignition coil; and a controller for stopping the operation of the convertor during a period in which the ignition signal is being transmitted from the ignition signal generator.
摘要:
An ignition apparatus for an internal combustion engine is capable of avoiding mis-ignition even if subject to external disturbances when a fail signal is transmitted through a common signal line on which an ignition signal can also be transmitted. An igniter is connected to receive the ignition signal from an ECU, and includes a waveform shaper connected with the signal line and having an input connected in parallel to an input resistance so as to make a voltage at the input higher than a prescribed voltage when the ignition signal flows into the input resistance, and a pulse output circuit connected to the input and having an output for generating the fail signal into which a secondary coil current is converted. The pulse output circuit adjusts a fail signal current such that the voltage at the input when the fail signal flows into the input resistance becomes less than the prescribed voltage.