Capacitive discharge ignition system
阅读：2发布：2023-11-18
专利汇可以提供Capacitive discharge ignition system专利检索，专利查询，专利分析的服务。并且An improved capacitor discharge ignition system for internal combustion engines. By regulating the peak primary current in a voltage step-up transformer for a DC-to-DC converter, a regulated quantity of energy is stored in the core of the transformer. The stored energy is used to charge a storage capacitor to a predetermined voltage. The charged capacitor is discharged through the primary winding of an ignition coil for generating a high voltage to fire a spark plug.，下面是Capacitive discharge ignition system专利的具体信息内容。
1. A capacitive discharge ignition system for use with an internal combustion engine having a power source and means for producing timed pulses for triggering the ignition system comprising, in combination, a storage capacitor, a voltage stepup transformer having primary and secondary windings mounted on a core, a controlled conduction device having input, output and control electrodes, means connecting said primary winding, said input electrode and said output electrode in series, means for connecting said series connected transformer and controlled conduction device to the power source, means connected to said control electrode responsive to each trigger pulse for switching said controlled conduction device to a conducting state whereby current flows from the power source through said primary winding and said controlled conduction device to store energy in said transformer core, first means connected to said control electrode responsive to an increasing current flow through said series primary winding and controlled conduction device for increasing the impedance of said controlled conductIon device to limit current flow through said controlled conduction device to a predetermined maximum level whereby the total energy stored in said core is regulated, second means responsive to the voltage across said primary winding dropping to a predetermined minimum as the current through said primary winding increases to said predetermined maximum level for switching said controlled conduction device to a nonconducting state whereby a collapsing magnetic field in said core establishes a predetermined high voltage across said secondary winding, means for charging said capacitor with such secondary voltage, means responsive to each trigger pulse for discharging said capacitor, and means responsive to the discharge of said capacitor for generating a high voltage for firing a spark plug.
2. A capacitive discharge ignition system, as set forth in claim 1, wherein said means for limiting current flow through said controlled conduction device includes a resistor, means connecting said resistor in series with said primary winding and said input and output electrodes whereby a voltage is established across said resistor substantially proportional to the current flow through said primary winding, and means responsive to such voltage across said resistor reaching a predetermined level for limiting conduction of said controlled conduction device whereby the maximum current through said primary winding is regulated.
3. A capacitive discharge ignition system, as set forth in claim 2, and including means responsive to the voltage across said capacitor exceeding a predetermined level for inhibiting switching said controlled conduction device to a conducting state whereby the maximum charge on said capacitor is limited if said discharging means fails.
4. A capacitive discharge ignition system, as set forth in claim 1, and including means responsive to the voltage across said capacitor exceeding a predetermined level for inhibiting switching said controlled conduction device to a conducting state whereby the maximum charge on said capacitor is limited if said discharging means fails.
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