In a misfire detecting apparatus for a multicylinder internal combustion engine, a rotational signal outputting unit outputs a rotary signal at every predetermined rotary angle, and a tentative misfire decision unit tentatively decides, on the basis of the rotary signal, whether or not misfire has occurred...http://www.google.de/patents/US5287736?utm_source=gb-gplus-sharePatent US5287736 - Misfire detecting apparatus for multicylinder internal combustion engines
