Engine start abnormality diagnosis apparatus

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12140115
APP PUB NO 20240084773A1
SERIAL NO

18451305

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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An engine start abnormality diagnosis apparatus determines a cause of a long cranking abnormality in which, when an engine including cylinders is started, start of the engine is not completed even if a cranking period is equal to or greater than a predetermined time. The engine start abnormality diagnosis apparatus includes a rotation speed detector and an abnormality diagnosis processor. The rotation speed detector detects a rotation speed of a crankshaft of the engine when at least one of the cylinders is in a latter stage of a compression stroke. The abnormality diagnosis processor determines that the cause of the long cranking abnormality is an electric system abnormality when the rotation speed is less than a predetermined threshold, and determines that the cause of the long cranking abnormality is a combustion abnormality when the rotation speed is equal to or greater than the threshold.

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Patent Owner(s)

Patent OwnerAddress
SUBARU CORPORATION1-20-8 EBISU SHIBUYA-KU TOKYO

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Degura, Kyouhei Tokyo, JP 1 0
Iizuka, Kei Tokyo, JP 4 35
Matsuda, Noriyuki Tokyo, JP 34 398
Oota, Yasuhiro Tokyo, JP 6 25

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