Error diagnosis device and error diagnosis method

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United States of America Patent

PATENT NO 11454186
APP PUB NO 20210017927A1
SERIAL NO

17040336

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Abstract

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The error diagnosis device has: an input unit that receives a downstream pressure value and an upstream pressure value, said downstream pressure value being detected on the downstream side of a fuel pump and said upstream pressure value being detected on the upstream side of the fuel pump; and a determination unit that, if the downstream pressure value is less than a preset first threshold value, determines whether or not the upstream pressure value is less than a preset second threshold value. The determination unit determines that an error has occurred further upstream than the fuel pump if the upstream pressure value is less than the second threshold value and determines that an error has occurred in the fuel pump if the upstream pressure value is at least the second threshold value.

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Patent Owner(s)

Patent OwnerAddress
ISUZU MOTORS LIMITED6-26-1 MINAMI-OI SHINAGAWA-KU TOKYO 140-8722

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ishii, Daiki Fujisawa, JP 36 60
Kobayashi, Yuusuke Fujisawa, JP 8 17
Noda, Kunio Fujisawa, JP 3 3
Okazaki, Fumihiko Tokyo, JP 2 0
Shidomi, Katsushi Fujisawa, JP 7 17

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