Effect of fuel composition and manifold conditions upon spray formation from an SI engine pintle injector

Journal Article · Sat Oct 01 00:00:00 EDT 1994 · SAE Special Publication

DOI:https://doi.org/10.4271/941865· OSTI ID:91232

Williams, P ^[1]; Beckwith, P

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1. Univ. College, London (United Kingdom)

The performance of a pintle-type gasoline injector has been studied. Observations performed on test-rigs and running engines suggest that under conditions of low manifold pressure a `pencil-jet` formation may replace the well atomized spray normally produced by the injector. Importantly, this phenomenon was not observed when using substitute fuels such as n-heptane. It is concluded that both the mechanical design of the injector and the combination of the liquid properties (density, viscosity and surface tension) influence the ability of a given injector to produce a well atomized spray at low manifold pressures. The paper discusses measures to prevent pencil-jet formation. 12 refs., 7 figs., 2 tabs.

• Sponsoring Organization: USDOE
• OSTI ID: 91232
• Report Number(s): CONF-9410173-; TRN: 95:006038-006
• Journal Information: SAE Special Publication, Journal Issue: 1054; Conference: Society of Automotive Engineers (SAE) international fuels and lubricants meeting and exposition, Baltimore, MD (United States), 17-20 Oct 1994; Other Information: PBD: Oct 1994
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
10 SYNTHETIC FUELS
33 ADVANCED PROPULSION SYSTEMS
SPARK IGNITION ENGINES
PERFORMANCE TESTING
AUTOMOTIVE FUELS
ATOMIZATION
FUEL INJECTION SYSTEMS
TEST FACILITIES
SURFACE TENSION
VISCOSITY
DENSITY
SYNTHETIC FUELS
HYDROCARBONS
MIXING
SPRAYS
CHEMICAL COMPOSITION
NUMERICAL DATA