Ducted fuel injection
| DWPI Title: Fuel injection system for direct injection engines, comprises a hollow tube which has an internal diameter between five to fifty times of an opening in a fuel injector along with duct with multiple ends |
| Abstract: Various technologies presented herein relate to enhancing mixing inside a combustion chamber to form one or more locally premixed mixtures comprising fuel and charge-gas with low peak fuel to charge-gas ratios to enable minimal, or no, generation of soot and other undesired emissions during ignition and subsequent combustion of the locally premixed mixtures. To enable sufficient mixing of the fuel and charge-gas, a jet of fuel can be directed to pass through a bore of a duct causing charge-gas to be drawn into the bore creating turbulence to mix the fuel and the drawn charge-gas. The duct can be located proximate to an opening in a tip of a fuel injector. The duct can comprise of one or more holes along its length to enable charge-gas to be drawn into the bore, and further, the duct can cool the fuel and/or charge-gas prior to combustion. |
| Use: Fuel injection system for direct injection engines. |
| Advantage: The fuel injection system includes ducts which create a locally premixed fuel and charge gas mixtures in a lower peak fuel to charge gas ratios before combustion, and thus minimizes the generation of soot. |
| Novelty: The fuel injection system comprises a fuel injector with an opening where fuel is injected. The fuel injector (140) carries fuel to a combustion chamber (105). A duct in a hollow tube is set, where the duct (150) is aligned for exiting the injected fuel through the hollow tube in the combustion chamber. The hollow tube has an internal diameter between five to fifty times of the opening in fuel injector. The duct has a first end and a second end, where the first end of the duct is attached on the opening. |
| Filed: 7/1/2015 |
| Application Number: US14789782A |
| Tech ID: SD 13289.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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