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Assessment of Gasoline Direct Injector Coking Effects on Spray Dynamics and Fuel Atomization
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 17, 2016 by SAE International in United States
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This paper presents study of multi-hole gasoline direct injector coking effects on spray dynamics and fuel atomization. Clean injectors were coked in extended fouling cycle in a multi-cylinder thermal engine. Deposit accumulation were characterized by fuel flow rate measurements. Optical tests were carried out in a constant volume chamber. High-speed imaging was used to quantify fuel plumes’ penetration length, plume cone angle and plume angle alternation due to deposit formation. Droplet size and velocities were measured with a Particle Doppler Phase Analyzer (PDPA). The experimental data was used to attain a better understanding of tip cocking effects in Gasoline Direct Injection (GDI) engines.