Ignition apparatus

摘要

An ignition apparatus includes: sparking coil supplying a sparking plug with a high voltage; an energy supply device supplying the sparking coil with energy; a first switch disposed therebetween; and a control device controlling the first switch's conduction. The energy supply device has a DC power supply, a resonance coil connected to the DC power supply, a sparking capacitor connected to the resonance coil, and a second switch disposed between the sparking capacitor and an earth, and charges the sparking capacitor to have a voltage value larger than that of the DC power supply in absolute value by making the resonance coil and the sparking capacitor generate an LC resonance when the second and first switches are turned ON and OFF, respectively, according to an instruction from the control device whereas supplying the sparking coil with energy when the second and first switches are operated inversely according to another instruction.

主权项

1. An ignition apparatus comprising:
a sparking coil for supplying a sparking plug with a high voltage; an energy supply device for supplying the sparking coil with energy; a first switch connected between the sparking coil and the sparking capacitor; and a control device for controlling conduction of the first switch, wherein: the energy supply device comprises a DC power supply, a resonance coil connected to the DC power supply, a sparking capacitor connected to the resonance coil, and a second switch connected between the sparking capacitor and an earth; the energy supply device charges the sparking capacitor to have a voltage value larger than an output voltage value of the DC power supply in absolute value by making the resonance coil and the sparking capacitor generate an LC resonance when the second switch is turned ON and the first switch is turned OFF according to a first instruction from the control device, and supplies the sparking coil with the energy supplied to the sparking capacitor when the second switch is turned OFF and the first switch is turned ON according to a second instruction from the control device, the first and second instructions control respective switching operations of the corresponding switches in such a way that when the first switch is turned ON, the second switch becomes turned OFF, and when the first switch is turned OFF, the second switch becomes turned ON; and an emitter of the first switch is directly connected to a collector of the second switch.