Fluid sprinkling – spraying – and diffusing – With system fluid relief or return to supply
Patent
1997-03-24
1999-01-19
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
With system fluid relief or return to supply
239 88, 239 96, 2395333, 2395851, B05B 900, F02M 4702
Patent
active
058605975
ABSTRACT:
An improved nozzle assembly for servo-controlled fuel injectors is provided which includes a needle valve control device including a rate shaping control device for effectively producing a predetermined time varying change in the flow rate of fuel injected into the combustion chamber during an injection event so as to reduce emissions. The rate shaping control device includes an injection control valve positioned along a drain circuit connected to a control volume positioned at one end of the needle valve element. The injection control valve includes an actuator for controlling the flow of fuel through the drain circuit to variably control the rate of movement of the needle valve element between the open and closed positions so as to provide the desired shaping to the flow rate of fuel into the combustion chamber. The injection control valve may include a control valve element positioned in the control volume adjacent the needle valve element for cooperating with the needle valve element to control the drain flow of fuel through the drain circuit during the injection event. The needle valve element may include a valve surface wherein positioning of the control valve member relative to the valve surface controls drain flow through the drain circuit. The valve surface may be either a flat valve surface or a conically shaped surface for positive abutment by the control valve member, or alternatively, the needle valve element and the control valve member may be of the spool-type.
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Brackett Jr. Tim L.
Cummins Engine Company, Inc.
Evans Robin O.
Kashnikow Andres
Leedom Jr. Charles M.
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