Misfire detection device and misfire detection method for engine

Abstract

A misfire detection device for an engine, includes: a misfire detection part for detecting a misfire state in at least one cylinder of the engine; an effective misfire determination part for determining, on the basis of an unburned parameter that is an indicator of an unburned fuel concentration in an exhaust gas duct, a risk of unburned fuel in the exhaust gas duct burning, when the misfire detection part detects the misfire state; and an engine stop processing control part for performing stop processing of the engine on the basis of a determination result in the effective misfire determination part.

Dependencies are inferred from the claim text.