Bi-directional fuel injection method

A fuel injector, comprising:

• a wall separating a fuel passage from an air passage;
• a fuel injection port extending from a first side of the wall to a second side of the wall for injecting a flow of fuel from the fuel passage into a flow of air in the air passage;
• and
• first and second feedback lines extending from a downstream end of the fuel injection port to an upstream end of the fuel injection port, wherein the first and second feedback lines are disposed on opposite sides of the fuel injection port, and wherein the first and second feedback lines are disposed entirely within the wall, wherein the first and second feedback lines are configured to passively induce feedback flows of fuel through the first and second feedback lines in an alternating manner such that the flow of fuel through the fuel injection port oscillates from side to side of the fuel injection port.

A fuel injector, comprising:

• a wall separating a fuel passage from an air passage;
• a fuel injection port extending from a first side of the wall to a second side of the wall for injecting a flow of fuel from the fuel passage into a flow of air in the air passage;
• and
• first and second feedback lines extending from a downstream end of the fuel injection port to an upstream end of the fuel injection port, wherein the first and second feedback lines are disposed on opposite sides of the fuel injection port, and wherein the first and second feedback lines are disposed entirely within the wall,
• wherein the first and second feedback lines each comprise first and second ends that are substantially orthogonal to a central axis of the flow of fuel, wherein the first end is proximate to the downstream end of the fuel injection port and the second end is proximate to the upstream end of the fuel injection port.

A fuel injector, comprising:

• a wall separating a fuel passage from an air passage;
• a fuel injection port extending from a first side of the wall to a second side of the wall for injecting a flow of fuel from the fuel passage into a flow of air in the air passage;
• and
• first and second feedback lines extending from a downstream end of the fuel injection port to an upstream end of the fuel injection port, wherein the first and second feedback lines are disposed on opposite sides of the fuel injection port, and wherein the first and second feedback lines are disposed entirely within the wall,
• wherein the cross-sectional area of the fuel injection port increases from the upstream end to the downstream end, and wherein a central axis of the flow of fuel through the fuel injection port is angled with respect to the wall.