Patent ID: 6119670
Filing Date: 2000-09-19
Classification: F02D,Y02T

Abstract:
A fuel injection system, comprising:a fuel source;means connected to said fuel source for introducing fuel in predetermined pulses to an engine;a controller operably coupled to said introducing means, said controller including:first means for detecting spark firing in said engine;second means for detecting minima in engine manifold absolute pressure;means operably coupled to said first and second means for synchronizing said predetermined pulses responsive to detecting said spark firing and said minima,said synchronizing means including means for varying pulse widths of said predetermined pulses responsive to said manifold absolute pressure;an oxygen sensor for determining an air/fuel mixture in an exhaust of said engine, said oxygen sensor providing an input to said controller,wherein said varying means is configured to vary pulse widths of said predetermined pulses responsive to said oxygen sensor, and said varying means includes a fuel look-up table storing pulse width values according to engine RPM (revolutions per minute) and said manifold absolute pressure; anda register for storing a first common correction factor applied to said pulse width values responsive to said oxygen sensor.