Engine unit including internal combustion engine and misfire detection device, and vehicle

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United States of America Patent

PATENT NO 11168633
APP PUB NO 20190136759A1
SERIAL NO

16179859

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Abstract

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An engine unit includes an internal combustion engine and a misfire detection device. The misfire detection device includes a rough road traveling determination unit that: (a) determines a rough road traveling state based on a distribution state of a crankshaft rotation speed fluctuation physical quantity acquired by a crankshaft rotation speed fluctuation physical quantity acquisition unit, or (b) includes a vehicle traveling state detection unit for detecting a physical quantity in relation to a vehicle traveling state except the crankshaft rotation speed fluctuation physical quantity, and determines a rough road traveling state based on a detection result obtained by the vehicle traveling state detection unit; and suspends a determination of a misfire in the internal combustion engine based on a determination result obtained by the rough road traveling determination unit.

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Patent Owner(s)

Patent OwnerAddress
YAMAHA HATSUDOKI KABUSHIKI KAISHA2500 SHINGAI IWATA-SHI SHIZUOKA 4388501 ?4388501
DENSO CORPORATION1-1 SHOWA-CHO KARIYA-CITY AICHI-PREF 448-8661

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fujime, Yoko Iwata, JP 11 123
Hotta, Minoru Kariya, JP 15 213
Nonogaki, Yoshihiko Kariya, JP 9 20

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