GAS DETECTION DEVICE, AND AIR-FUEL RATIO CONTROL DEVICE AND INTERNAL COMBUSTION ENGINE INCORPORATING THE SAME

摘要

A gas detection device includes a gas sensing portion, a heater, and an insulating layer provided between the gas sensing portion and the heater. The gas detection device further includes a control section and a portion of an engine control device for controlling operations of the gas sensing portion and the heater, the control section ensuring that timing of changing a current supplied to the heater is synchronized with a detection operation by the gas sensing portion. The gas detection device prevents detection errors of a gas sensor even when noise associated with temperature control of a heater occurs.