Internal-combustion engines – Charge forming device – Auxiliary air or gas used to inject fuel
Patent
1997-10-14
1999-03-23
Kwon, John T.
Internal-combustion engines
Charge forming device
Auxiliary air or gas used to inject fuel
239408, 2395332, F02M 2300
Patent
active
058846115
ABSTRACT:
An effervescent fuel injector, particularly one suitable for diesel and direct injection engine applications, which is capable of injecting, particularly intermittently, an atomized fuel spray with droplets of a size in the range of 5-6 micron SMD without requiring high pressures is achieved in a preferred embodiment effervescent fuel injector of the valve covered orifice (VCO) type having primary and secondary nozzle valves which remain closed when the control valve is not actuated, but which open one or two sets of nozzle orifices depending on fuel volume requirements. A three-way, on-off control valve is used to trigger commencement of the supply of gas via a control valve simultaneously with opening of at least some of the nozzle orifices. Gas and fuel are mixed in a mixing chamber located upstream of the nozzle valves in a manner creating a gas-fuel aeration, and as the aeration is sprayed from the nozzle orifices, the gas expands rapidly breaking the fuel into fine droplets.
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Eckerle Wayne A.
Peters Lester L.
Tarr Yul J.
Tikk Laszlo D.
Cummins Engine Company, Inc.
Kwon John T.
Safran David S.
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