The Spray Characteristics of Automotive Port Fuel Injection-A Critical Reviews

Zhao, Fuquan; Lai, Ming Chia; Harrington, David L.

doi:10.4271/950506

Cited by 67 publications

(23 citation statements)

References 23 publications

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“…Injection pressures of port injectors are typically much lower (less than 500 P a ) than cylinder injector pressures so that atomization is not so fine [6]. The resulting lower injection velocities give rise to less droplet splash and rebound from walls.…”

Section: Introductionmentioning

confidence: 99%

A Particle Numerical Model for Wall Film Dynamics in Port-Injected Engines

O’Rourke¹,

Amsden²

1996

SAE Technical Paper Series

206

121

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Section: Introductionmentioning

confidence: 99%

A Particle Numerical Model for Wall Film Dynamics in Port-Injected Engines

O’Rourke¹,

Amsden²

1996

SAE Technical Paper Series

206

121

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“…All spray characteristics are determined by particular injector design and operating conditions [1,2]. Many spray parameters including fuel metering, atomization characteristics, targeting, and pulse-to-pulse variability have a direct impact on engine performance [3]. An optimized spatial fuel distribution plays a key role in reducing fuel wall attachment and thus, improving engine transient response and reducing hydrocarbon (HC) emissions, which is greatly determined by injector design and intake port geometry.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Injection Characteristics of a Multi-hole port injector on various Fuel Injection pressures and Temperatures

Movahednejad

Ommi

Nekofar

2013

EPJ Web of Conferences

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Abstract. The structures of the port injector spray dominates the mixture preparation process and strongly affect the subsequent engine combustion characteristics over a wide range of operating conditions in port-injection gasoline engines. All these spray characteristics are determined by particular injector design and operating conditions. In this paper, an experimental study is made to characterize the breakup mechanism and spray characteristics of a injector with multi-disc nozzle (SAGEM,D2159MA). A comparison was made on injection characteristics of the multi-hole injectors and its effects on various fuel pressure and temperature. The distributions of the droplet size and velocity and volume flux were characterized using phase Doppler anemometry (PDA) technique. Through this work, it was found that the injector produces a finer spray with a wide spray angle in higher fuel pressure and temperature.

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“…In principle, the utilization of an optimal fuel-air mixture should provide the required power output with the lowest fuel consumption that is consistent with smooth and reliable operation (Zhao et al, 1995). Over past decades, MPI system has evolved into an electronic, pulse-width-modulated system that utilized multi point injectionly-timed separate injections into each intake port.…”

Section: Multi Point Injection Gas Injectormentioning

confidence: 99%

“…Over past decades, MPI system has evolved into an electronic, pulse-width-modulated system that utilized multi point injectionly-timed separate injections into each intake port. According to Zhao et al (1995), these transient sprays of 2.5 to 18.0 ms duration have a constant phase relative to the intake valve event, either for start on injection or end of injection, and provide significant advantages in engine transient response and hydrocarbon (HC) emissions. It is necessary to note, however, that the meteoric expansion in the use of such systems has generally out-paced the basic knowledge and understanding of the complex, transient fuel sprays that they produce.…”

Section: Multi Point Injection Gas Injectormentioning

confidence: 99%