Importance

Loading Importance Indicators...

Abstract

An electromagnetic coil operates a fuel injector valve and generates a high voltage pulse to ignite a spark plug in an internal combustion engine. The primary and secondary windings of a coil are disposed between inner and outer cores. Electric current flowing at a first level through the primary winding induces magnetic flux in a first flux path to move a fuel flow control member to open a fuel flow path between a fuel inlet and a fuel outlet in the fuel injector valve. Current flowing at a second higher level through the primary winding induces a higher level of magnetic flux in a second flux path to move the fuel flow control member to a position closing the fuel flow path. A controller generates the first and second primary winding currents at the proper time in the engine operating cycle in response to engine operating conditions. Cessation of current flow in the primary winding collapses the magnetic field in the inner and outer cores causing a high voltage to be generated in the secondary winding to ignite the spark ignition device in the engine.

Loading the Abstract Image...

First Claim