Misfire-detecting system for internal combustion engines

U.S. Patent Number: 5388560

Abstract: A misfire-detecting system for an internal combustion engine compares detected sparking voltage with a first predetermined comparative level and a second predetermined comparative level lower than the first predetermined comparative level. Whether a misfire has occurred in the engine is determined based upon a logical relationship between results of the comparisons. As a result, a misfire can be detected accurately even when dielectric breakdown of the mixture occurs while a misfire has occurred.

Inventors: Hisaki; Takashi (Wako, JP), Shimasaki; Yuichi (Wako, JP), Baba; Shigeki (Wako, JP), Kanehiro; Masaki (Wako, JP), Ishioka; Takuji (Wako, JP), Maruyama; Shigeru (Wako, JP), Kakimoto; Kazuhito (Wako, JP), Chikamatsu; Masataka (Wako, JP), Terata; Shukoh (Wako, JP), Maeda; Kenichi (Wako, JP)

Assignee: Honda Giken Kogyo Kabushiki Kaisha (Tokyo, JP)

Application Number: 08/051,705

Issued: 1995-02-14

Expired: 2007-02-14

Classes: 123/406.14 ; 324/399; 73/116

Field of search: 123/630,479,148F,481 324/388,399,380,378 73/117.3,116

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