Internal-combustion engines – Precombustion and main combustion chambers in series – Chamber temperature control means
Patent
1989-02-28
1990-10-02
Cross, E. Rollins
Internal-combustion engines
Precombustion and main combustion chambers in series
Chamber temperature control means
123 25N, 606051, F02B 4700
Patent
active
049600800
ABSTRACT:
A water injection system reduces nitrous oxide emissions in turbocharged internal combustion engines driving electrical power generators. A current-activated relay located in switchgear associated with the generator becomes energized asserted when the current output of the generator exceeds a value that corresponds to predetermined NOx permissible emissions level. The output of the relay activates a motor starter which controls a rotary vane pump. The pump draws distilled water from a water tank, forcing the water through a particle strainer, an adjustable flow regulator, a solenoid, a flow meter, and backflow check valves, to water injection nozzles located in the combustion airstream immediately after a turbocharger compressor. The nozzles provided include fine-mesh strainers and atomize the water to 100 micron particle sizes, and distribute the water particles in an 85-degree spray cone pattern. The resulting system is both reliable and cost-effective, and is readily adaptable to a variety of engine and generator combinations by modifying the current relay trip point and adjusting the flow regulator.
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Kubo Isoroku
O'Neill Jeff S.
Schisler H. Edmund
Cross E. Rollins
Cummins Engine Company, Inc.
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