Quick start fuel injection apparatus and method

A fuel delivery system for internal combustion engines comprising:

• a plurality of fuel injectors, each injector comprising a fuel pump which comprises a reciprocating assembly for generating a fuel pulse, and an actuating coil for inducing motion of the reciprocating assembly, a pressure chamber in communication with the reciprocating assembly, and a nozzle having an inlet, the inlet being in communication with the pressure chamber;
• a plurality of combustion chambers, each combustion chamber being in communication with the outlet nozzle of at least one of the plurality of fuel injectors;
• an energy controller having a repeatable cycle which comprises generating an initial energy phase and a secondary energy phase in the actuating coil of each of the plurality of injectors, wherein the initial energy phase induces initial movement of the reciprocating assembly and the secondary energy phase induces further movement of the reciprocating assembly;
• and
• a sequencing controller for determining the order of activation of each actuating coil by the energy controller.

A method of controlling a pump injector comprising:

• (a) supplying current at an initial rate to an actuating coil;
• (b) generating a first force within the actuating coil;
• (c) applying the first force to a reciprocating pump;
• (d) inducing an initial motion of the reciprocating pump;
• (e) supplying current at a secondary rate to the actuating coil;
• (f) generating a second force within the actuating coil;
• (g) applying the second force of the reciprocating pump;
• (h) inducing a secondary motion of the reciprocating pump, wherein the secondary motion of the reciprocating pump creates a fuel pulse to initiate expulsion of the fuel from within the injector, and
• (i) returning the reciprocating pump to an initial position.

An internal combustion engine, comprising:

• a combustion chamber;
• a fuel delivery system for injecting fuel into the combustion chamber, the fuel delivery system comprising:
• a fuel pump having a coil for inducing motion of a member within the pump to produce a surge in fuel pressure;
• and
• a controller for providing a current pulse to the coil, the current pulse having a first portion and a second portion, wherein the first portion is adapted to overcome resistive forces opposing motion of the member and induce initial movement of the member, further wherein the second portion is adapted to continue the movement of the member initiated by the first portion.