| 摘要 |
An automobile engine misfire detecting method adapted to use a wide-range oxygen sensor mounted at a gas exhausting system wherein an abrupt man-made concentration change of oxygen is generated prior to entry of conventional misfire detection judging logic and response characteristic of wide-range oxygen sensor is measured therefrom, on which standard value of misfire detection judgment and standard phase angle range for distinguishing misfired cylinder are corrected to perform the misfire detection and misfired cylinder discrimination, thereby enabling to minimize the influence caused by aged wide-range oxygen sensor and characteristics of each sensor and to effect a more accurate detecting operation.
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