Patent ID: 6408820
Filing Date: 2002-06-25
Classification: F02B,F02P

Abstract:
A capacitor discharge engine ignition system that includes:ignition coil means having a primary winding and a secondary winding for coupling to. engine ignition means, an ignition charge storage capacitor coupled to said primary winding, first electronic switch means having primary current conducting electrodes in circuit with said ignition charge storage capacitor and said primary winding, and a control electrode responsive to trigger signals for operatively connecting said ignition charge storage capacitor to discharge through said primary winding, charge/trigger coil means for generating periodic signals in synchronism with operation of the engine, including charge coil means for generating a charge signal to charge said ignition charge storage capacitor and trigger coil means for generating said trigger signal, means for controlling timing of said trigger signal as a function of engine speed comprising second electronic switch means including an SCR having a gate electrode, and an anode and cathode operatively connected to said control electrode of said first electronic switch-means, and an RC circuit, including a resistor and a second capacitor, operatively connecting said charge coil to said gate electrode of said SCR to prevent application of said trigger signal to said control electrode of said first electronic switch means as a function of engine speed, said means for controlling timing of said trigger signal comprising means for advancing timing of said trigger signal as a function of increasing engine speed, suppression of said trigger signal during occurrence of said charge signal automatically advancing occurrence of said trigger signal following occurrence of said charge signal, and third electronic switch means having primary current conducting electrodes operatively connected between said trigger coil means and said control electrode of said first electronic switch means, and a control electrode operatively coup led to said ignition charge storage capacitor.