Iowa Patent of the Month – April 2021
Fuel injectors are designed with a gaseous fuel circuit gap, which acts as a a separation point for the outer air circuit. This allows liquid fuel droplets to accumulate as carbon when it backflows. The buildup of carbon can cause the fuel circuit to have blockages and reduce efficiency. Delavan, Inc. has redesigned fuel injectors to reduce this carbon buildup.
Their design uses a gas channel with a slot opening that is designed to create a uniform flow of fuel into the air stream. An air swirler is positioned within the air circuit. Using a reduction in flow area, and the force of the air swirler, the fuel stream creates a ribbon effect for smooth transfer into the air circuit. With this design, fuel mixes into the air stream without producing liquid fuel droplets along the air circuit and therefore without carbon build up.
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