Combined ignition control and fuel injection valve operating circuit for an internal combustion engine
AssigneeLucas Industries Limited
InventorWilliam F. Hill
Life of this patent
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Abstract
A combined ignition control and injection valve operating circuit has an inductor connected in (series or) parallel with the ignition coil so that it carries current whenever an output transistor of an ignition control circuit is on. A thyristor connects the inductor to an energy storage capacitor and turns on each time the transistor turns off to create an ignition spark. The capacitor is thus charged up and the stored energy is discharged through a triac into an injection valve solenoid to speed up current growth in the latter on each energization thereof.
Claims9
A combined ignition control and fuel injection valve solenoid operating circuit comprising:
- an ignition control circuit, said circuit including a first semi-conductor switch element means for controllably interrupting current flow in an ignition coil;
- an energy storage element;
- an inductive means, responsive to said switch element means interrupting current flow in an ignition coil, for storing electrical energy in said energy storage element;
- and
- injection valve solenoid control means for energizing an injection valve solenoid, said control means including means for connecting said energy storage element to said injection valve solenoid when said control means energizes said injection valve solenoid.
Dependencies are inferred from the claim text.