Method of controlling a fuel injector
AssigneeWalbro Corporation
InventorsJeffrey C. Hoppe, Duried F. Rabban, Bradley J. Roche, David L. Speirs
Life of this patent
Estimating the term…
Abstract
In at least some implementations, a charge forming device includes a body that has a throttle bore, a throttle valve associated with the throttle bore, a coupler and an actuator. The throttle has a valve head received within and movable relative to the throttle bore, and a valve shaft to which the valve head is coupled. The coupler is connected to the valve shaft and carries or includes a sensor element. And the actuator has a drive shaft coupled to the coupler so that rotation of the drive shaft is transmitted to the coupler and the valve shaft.
Claims18
A method of controlling fuel injection events in an internal combustion engine, the method comprising the steps of:
- sensing pressure at or near an outlet of a fuel injector with a negative pressure sensor to generate a negative pressure signal;
- and
- processing the negative pressure signal, by a controller, during each engine revolution so that when an intake valve of the internal combustion engine is open and a piston is travelling downward to create a negative relative pressure as sensed by the negative pressure sensor at or near the outlet of the fuel injector, the controller opens a fuel metering valve of the fuel injector so that the negative relative pressure aids fuel flow from the fuel metering valve.
A method of controlling fuel injection of a throttle body assembly, comprising:
- providing a fuel metering valve with an inlet to which fuel is delivered, a valve element that controls fuel flow rate, and an outlet downstream of the valve element;
- providing an actuator with an armature slidably configured for reciprocation between extended and retracted positions, the valve element moved by the armature relative to a valve seat;
- providing a sensor configured to sense a fuel pressure at the outlet;
- sensing the fuel pressure at the outlet with the sensor;
- and
- only actuating the valve element when the fuel pressure at the outlet is a negative relative pressure by retracting the armature such that the valve element is spaced from the valve seat and fuel may flow through the valve seat.
Dependencies are inferred from the claim text.