Patent ID: 6388445
Filing Date: 2002-05-14
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 a charge coil for generating a charge signal to charge said ignition charge storage capacitor, and a trigger coil for generating said trigger signal to discharge said charge storage capacitor through said first switch means and said primary winding, and means for controlling timing of said trigger signal as a function of engine speed comprising second electronic switch means having a control electrode and primary current conducting electrodes 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 control electrode of said second electronic switch means, in parallel with said charge storage capacitor, to prevent application of said trigger signal to said control electrode of said first electronic switch means during occurrence of said charge signal and thereby control timing of application of said trigger signal to said control electrode of said first electronic switch means as a function of engine speed.