Automatic control of contaminant reduction
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United States of America Patent
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May 5, 1987
Grant Date -
N/A
app pub date -
Nov 4, 1985
filing date -
Nov 13, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In an automatic control method for reduction in the level of contaminants emitted by a gas engine, the automatic control process is orientated in accordance with the reference point at which lambda is equal to unity and enriches the mixture after detecting this point by a certain step. Subsequently the instantaneous probe potential is measured and used by an automatic control circuit as a set point, which so affects the actuator for setting the air ratio that the probe potential is kept constant at this set point. The automatic control system in keeping with the invention reacts immediately in response to a disturbance and does not have to wait until a renewed search for the reference point takes place.
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