SENSOR CONTROL APPARATUS, SENSOR CONTROL SYSTEM, AND SENSOR CONTROL METHOD

摘要

A sensor control apparatus which receives from a gas sensor (10) a sensor output signal Ip corresponding to the concentration of a specific gas component, and a pressure signal P output from a pressure sensor (20). The sensor control apparatus includes a computation section (38) which computes a specific component concentration which is corrected based on the pressure signal P so as to eliminate the influence of the pressure of the gas. The sensor control apparatus includes response adjustment sections (34) and (36) for adjusting the response rates of the sensor output signal Ip and the pressure signal P before being input to the computation section (38), the response rate exhibiting a time variation of the corresponding signal to a change in the pressure of the gas, such that the response rate of the sensor output signal Ip or the response rate of the pressure signal P, whichever is faster, approaches the slower of the two.

主权项

1. A sensor control apparatus including a computation section which receives from a gas sensor a sensor output signal corresponding to the concentration of a specific gas component contained in a gas flowing through a flow passage provided in an internal combustion engine, and a pressure signal output from a pressure sensor which measures the pressure of the gas, the computation section computing a specific component concentration which represents the concentration of the specific gas component and is corrected based on the pressure signal in order to eliminate an influence of the pressure of the gas on the sensor output signal,
the sensor control apparatus comprising: a response adjustment section which adjusts a response rate of at least one of the sensor output signal and the pressure signal before being input to the computation section, the response rate exhibiting a time variation of the corresponding signal to a change in the pressure of the gas, such that the response rate of the sensor output signal or the response rate of the pressure signal, whichever is faster, approaches the slower of the response rate of the sensor output signal and the response rate of the pressure signal.