KR910021533A - Air-fuel ratio detection device - Google Patents

Abstract

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Description

Air-fuel ratio detection device

Since this is an open matter, no full text was included.

1 is a schematic configuration diagram of an embodiment of the present invention, FIG. 2 is a waveform diagram for explaining the operation, and FIG. 3, FIG. 4, and FIG. 6 are specific configuration diagrams of the second detection means, respectively.

Claims (2)

A sensor section having a detection chamber surface for limiting the detection chamber in contact with the exhaust gas atmosphere after combustion of the mixer through a sonic volcanic hole, and outputting an electric signal according to the oxygen concentration in the detector body in the detection chamber, and a detection limiting the detection chamber. A positive electrode is formed on each of the detection chamber surface and the exhaust gas surface having a seal surface and an exhaust gas surface exposed to the gaseous atmosphere, and the detection chamber surface is separated from the exhaust gas surface by an electric control signal applied between the electrodes. Oxygen ion conductive pulp cells capable of forcibly moving oxygen ions between them and generating electromotive force according to the difference between the oxygen concentration in the detector chamber and the oxygen concentration in the exhaust gas atmosphere, and electrical signals from the sensor unit. Therefore, the electrical agent is formed between the positive electrodes of the pump cell so as to be near the theoretical performance ratio of the detector body in the detection chamber. A control means for applying a signal, first detecting means for outputting an air-fuel ratio signal corresponding to the oxygen concentration in the exhaust gas atmosphere based on the magnitude of the electric control signal, and detecting the voltage between the positive electrode of the pump cell An air-fuel ratio detecting device comprising a second detecting means for generating an output when the exhaust gas atmosphere becomes a theoretical air fuel ratio. A sensor section having a detection chamber surface for limiting the detection chamber in contact with the exhaust gas atmosphere after combustion of the mixer through a sonic volcanic hole, and outputting an electric signal according to the oxygen concentration in the detector body in the detection chamber, and a detection limiting the detection chamber. A positive electrode is formed on each of the detection chamber surface and the exhaust gas surface having a seal surface and an exhaust gas surface exposed to the exhaust gas atmosphere and between the detection chamber surface and the exhaust gas surface by an electric control signal applied between the electrodes. Oxygen-ion conductive pulp cells which can forcibly move oxygen ions between the same and generate electromotive force according to the difference between the oxygen concentration in the detector chamber and the oxygen concentration in the exhaust gas atmosphere, and the sensor signal from the sensor unit. Therefore, the electricity between the positive electrode of the pump cell so that the detector body in the detection chamber is near the theoretical performance ratio. Control means for applying the fish signal, first detection means for outputting an air-fuel ratio signal corresponding to the oxygen concentration in the exhaust gas atmosphere based on the magnitude of the electric control signal, voltage difference and theory between the positive electrodes of the pump cell And a second detecting means for generating an output by comparing a threshold corresponding to the air-fuel ratio, and a threshold setting means for increasing and decreasing the threshold. ※ Note: This is to be disclosed by the original application.