Internal-combustion engines – Charge forming device – Charge-mixing device in intake
Patent
1979-09-20
1982-03-09
Lall, P. S.
Internal-combustion engines
Charge forming device
Charge-mixing device in intake
123545, 123549, 123188M, 55466, F02M 2906
Patent
active
043183867
ABSTRACT:
A vortex fuel air mixer is positioned between the air throttle and the intake manifold of an engine. Part of the expansion flow velocity past the air throttle flows tangentially into the vortex chamber of the mixer, providing angular momentum which drives the flow into a vortical pattern. The flow streamlines within the vortical flow form into a generally irrotational flow pattern which swirls from the outside wall of the vortex chamber inwardly to a central vortex chamber outlet. This outlet feeds the engine intake manifold. Centrifugal forces in the swirling flow fling fuel droplets to the outside wall of the vortex chamber (in the manner of a cyclone scrubber). This liquid fuel must evaporate in order to leave the vortex chamber. The interaction of the evaporation, flow structure and turbulence relations inside the vortex chamber produces an essentially homogeneous mixture at the vortex chamber outlet. Fuel evaporation time in the vortex chamber is quite short, so that the device exhibits excellent transient response.
REFERENCES:
patent: 1993155 (1935-03-01), Faber, Jr.
patent: 2232413 (1941-02-01), Steskal
patent: 2411204 (1946-11-01), Graziano
patent: 3146768 (1964-09-01), Osborne
patent: 3273161 (1966-09-01), DiGiorgio
patent: 3336017 (1967-08-01), Kopa
patent: 3395899 (1968-08-01), Kopa
patent: 3736911 (1973-06-01), Melchlor
patent: 3874357 (1975-04-01), List et al.
Kriesel Kenneth W.
Showalter M. Robert
Siewert Charles L.
Automotive Engine Associates
Lall P. S.
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