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TECHNICAL PAPERS: Injection and Fuel Air Mixture Preparation

Parametric Characterization of High-Pressure Diesel Fuel Injection Systems

[+] Author and Article Information
T.-C. Wang, J.-S. Han, X.-B. Xie, M.-C. Lai, N. A. Henein

Mechanical Engineering Department, Wayne State University, 5050 Anthony Wayne Drive, #2123, Detroit, MI 48202

E. Schwarz, W. Bryzik

US TARDEC, Detroit, MI

J. Eng. Gas Turbines Power 125(2), 412-426 (Apr 29, 2003) (15 pages) doi:10.1115/1.1498268 History: Received June 01, 2000; Revised March 01, 2002; Online April 29, 2003
Copyright © 2003 by ASME
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References

Figures

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Injection-rate transient at system startup
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Injection-rate and needle lift measurement for pilot/main
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The effect of dwell time on injection rate of the main injection
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The effect of dwell time on needle lift of the main injection
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The effect of dwell time on quantity of the main injection
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The effect of pilot injection pressure to main injection pressure
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Sac pressure and up-stream pressure with 380 bar C.R.P and 2.25 ms duration
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Sac pressure and upstream pressure with 276 C.R.P and 1.7 ms duration
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Injection pressure of EUI system, with various injection duration and 500 rpm camshaft speed
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Injection pressure of EUI system, with various camshaft speeds and 15-deg injection duration
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Hole-to-hole penetration variation of the HEUI sprays, with 620 mini-sac nozzle, pressure of 77 MPa, duration of 2.85 ms, and ambient pressure of 2.76 MPa (27.6 bar)
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Hole-to-hole penetration variation of the HEUI sprays, with 620 mini-sac nozzle, pressure of 77 MPa, duration of 2.85 ms, and ambient pressure of 1.72 MPa (17.2 bar)
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Hole-to-hole penetration variation of the HEUI sprays, with 610 VCO nozzle, pressure of 126 MPa, duration of 2.25 ms, and ambient pressure of 2.76 MPa (27.6 bar)
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Schematic diagram of the experimental setup and fuel system
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Injection pressure measurement for both upstream and sac pressure  
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Schematic of the experimental setup of nonevaporative spray visualization
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Schematic of microscopic visualization of VCO nozzle of EUI system
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The effect of common-rail pressure on injection pressure
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The effect of injection duration on injection pressure
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The effect of C.R.P on the injection rate
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The effect of length of rate-shaping pipe on the injection rate
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The effect of nozzle flow area on the injection rate
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Dynamic discharge coefficient—620 minisac nozzle
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Dynamic discharge coefficient—730 VCO nozzle
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Dynamic discharge coefficient—610 VCO nozzle
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Injection pressure transient at system startup
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Schematic of orifice-type nozzle
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Hole-to-hole penetration variation of the EUI sprays, with 0.188-mm VCO nozzle, pressure of 80 MPa, duration of 2.3 ms, and ambient pressure of 2.76 MPa (27.6 bar)
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Hole-to-hole penetration variation of the EUI sprays, with 0.188-mm VCO nozzle, pressure of 80 MPa, duration of 2.3 ms, and ambient pressure of 1.72 MPa (17.2 bar).
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Correlation between measured and modeled penetration of the HEUI system, with pressure of 77 MPa, duration of 2.25 ms, 620 mini-sac nozzle, and ambient pressures of 1.72 and 2.76 MPa (17.2 and 27.6 bar).
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Maximum penetration length of pilot injection with various injection pressure; 25 MPa (left), 30 MPa (middle), and 50 MPa (right)
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Early spray developments
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Still photographs of early development of EUI sprays, with 0.188-mm VCO nozzle, 1500 rpm engine speed, and duration of 10 deg
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Still photographs of early spray development of EUI sprays, with 0.188-mm VCO nozzle, 750 rpm engine speed, and injection duration of 10 deg
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Still photographs of EUI spray at peak injection of 200 MPa, with 1500 rpm engine speed and injection duration of 25 deg
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Microscopic visualization of EUI spray
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Spray cone angle and injection pressures of HEUI spray, with fixed duration of 2.25 ms and 610 VCO nozzle
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Spray cone angle and injection pressure of HEUI spray, with fixed common-rail pressure of 37.9 MPa (379 bar)
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Spray cone angle of EUI spray with various camshaft speeds
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Spray cone angle of EUI spray with fixed camshaft speed of 500 rpm and injection duration of 7 and 10 crank-angle degree
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End of injections of EUI system under various camshaft speeds and injection duration
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Still photographs of end of injection of EUI system, with 1500-rpm engine speed and 10-deg duration
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Effect of nozzle configuration on end of injection of HEUI system. (610 VCO versus 620 mini-sac), with common-rail pressure of 379 bar.
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Effect of nozzle configuration on end of injection of HEUI system. (610 VCO versus 620 mini-sac), with common-rail pressure of 276 bar.
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Secondary injection (needle valve bouncing)

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