Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1994-07-15
1996-06-25
Nelli, Raymond A.
Internal-combustion engines
Charge forming device
Fuel injection system
F02M 5100
Patent
active
055290434
ABSTRACT:
This invention relates to a signal processor for processing a signal and outputting a processed value. The processor comprises a mechanism for determining whether or not the signal exceeds a preset value, a mechanism for outputting the signal as the processed value when the signal does not exceed the preset value, and a mechanism for outputting the preset value as the processed value when the signal exceeds the preset value. This invention further provides a mechanism for computing a difference between the signal and the preset value when the signal exceeds the preset value, a memory for storing this difference as a postponed correction amount, and a mechanism for adding the postponed correction amount to said signal when the signal no longer exceeds the preset value. In this way, by compensating at a later time for errors arising from modifications made when the signal exceeded said preset value, the precision of operations and controls based on the processed value is improved. Further, in control systems using the integral of said signal, the precision of integral values is also improved. This invention therefore provides effective correction of signal processing errors when applied to the output of an air flow meter having a heating element wound on a bobbin, or to the control of a flowrate control valve installed in an intake air passage of a lean burn engine.
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Itoyama Hiroyuki
Nagaishi Hatsuo
Ohta Kenji
Nelli Raymond A.
Nissan Motor Co,. Ltd.
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