Patent ID: 7267105

Claim:
A distributor for an internal combustion engine having a camshaft, comprising: a shaft having a drive gear adapted for connecting to the engine's camshaft; a trigger disk positioned on said shaft so as to rotate coaxially therewith, said trigger disk having thereon a plurality of tabs; an optical sensor positioned relative to said trigger disk so that said plurality of tabs passes within sensor range as said trigger disk rotates, said sensor generating signals responsive to sensing of said plurality of tabs; a manifold absolute pressure sensor operably connected to sense intake manifold absolute pressure in the internal combustion engine; a microprocessor operatively linked with said optical sensor and with said manifold absolute pressure sensor and programmed with one or more engine load compensating ignition curves and one or more engine speed compensating ignition curves for calculating predetermined rates of ignition advance responsive to signals from the optical sensor and the manifold absolute pressure sensor; a first selector operably linked with said microprocessor for manually selecting one of said engine load compensating ignition curves; and a second selector operably linked with said microprocessor for manually selecting one of said engine speed compensating ignition curves.