Switch-mode synthetic power inductor

摘要

A fuel delivery system for a vehicle includes a fuel injector that meters fuel flow and provides for preheating fuel to aid combustion. A control circuit including a synthetic inductor drives a heated element within the fuel flow.

主权项

1. A fuel delivery system comprising:
a fuel injector metering fuel to an energy conversion device, the fuel injector including an inductor for an inductively energized heating element for heating the fuel; and a controller including a driver circuit for driving metering of fuel and for energizing the inductor of the heating element, the driver circuit for energizing the inductor of the heating element including a switch-mode synthetic inductor, which resolves the time-domain inductor behavior according to the equation:i=1L⁢∫-∞t⁢v⁡(τ)⁢ⅆτ where i=is the current as a function of the integral in time of v, or voltage across the inductor, and some multiplier equivalent to 1/L, the synthetic inductor further comprising a current sense resistor connected between a power source for the controller and a power circuit, which is coupled to the inductor for the heating element and configured to provide current to said inductor from the power source for the controller, the voltage, v, across the inductor being proportional to a voltage across the current sense resistor.