Diagnosis apparatus for internal combustion engine
AssigneeHitachi, Ltd.
InventorsYoichi Iihoshi, Shin Yamauchi, Toshio Hori, Yoshikuni Kurashima
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Abstract
In a diagnosis apparatus for an internal combustion engine which determines the abnormality of a linear A/F sensor which is disposed on the upstream side of a catalyst of the engine and detects the A/F of exhaust gas, the apparatus includes a response/gain deterioration detection unit that separately detects the response deterioration in which the response of the linear A/F sensor is delayed and the gain deterioration in which the detection sensitivity of the linear A/F sensor is abnormal.
Claims9
A diagnosis apparatus for an internal combustion engine which diagnoses a linear A/F sensor which is disposed within an exhaust pipe of the engine and detects an A/F of exhaust gas, comprising:
- a unit which separately detects response deterioration and gain deterioration of the linear A/F sensor.
Dependencies are inferred from the claim text.