Power plants – Internal combustion engine with treatment or handling of... – Having means analyzing composition of exhaust gas
Patent
1993-02-10
1995-06-27
Hart, Douglas
Power plants
Internal combustion engine with treatment or handling of...
Having means analyzing composition of exhaust gas
60277, 60278, 123688, 123691, F01N 320
Patent
active
054269342
ABSTRACT:
An engine monitoring system and/or emission reduction system is provided for use in conjunction with an internal combustion engine. The system includes a plurality of sensors which detect various engine operating conditions and in which each sensor generates an output signal representative of its particular engine operating condition. At least one of these sensors is a gas sensor associated with the exhaust system which produces an output signal indicative of the concentration of nitric oxides in the exhaust emissions and which has an output which varies as a function of the concentration of such nitric oxides. A central processing unit receives inputs from the various engine sensors and, in accordance with preprogrammed algorithms, monitors the engine for failure and/or deterioration of various components in the emission reduction system as well as the various engine sensors. The processing unit further generates output signals which controls the operation of various engine components to optimize the operating condition of the engine as well as to meet governmental standards relating to engine emissions.
REFERENCES:
patent: 4079714 (1978-03-01), Saito
patent: 4638443 (1987-01-01), Kaneyasu et al.
patent: 5175997 (1993-01-01), Blanke
patent: 5233934 (1993-08-01), Krigmont
patent: 5259189 (1993-11-01), Baier
Hunt Frank W.
Kaneyasu Masayoshi
Saikalis George
Hart Douglas
Hitachi America Ltd.
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