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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2017/130527
Kind Code:
In fuel injection control of an internal combustion engine, it is necessary to supply an optimum amount of fuel that can be completely combusted by oxygen in intake air, but the oxygen concentration in the atmosphere is affected by humidity. In the present invention, by separating and calculating a dry air flow rate, which directly affects the amount of oxygen, and a humidity flow rate, which is a variable factor of oxygen concentration, in the intake air of an internal combustion engine, it becomes possible to supply fuel to cylinders of the internal combustion engine at an optimum air fuel ratio. Further, high-precision control, which also includes EGR for recirculating some exhaust gas flowing through an exhaust pipe to an intake pipe, becomes possible.

AKAGI Yoshihiko (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
ASANO Seiji (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
ORYOJI Kazuhiro (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
Application Number:
Publication Date:
August 03, 2017
Filing Date:
November 16, 2016
Export Citation:
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HITACHI AUTOMOTIVE SYSTEMS, LTD. (2520, Takaba Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
International Classes:
F02D41/04; F02D21/08; F02D35/00; F02D45/00
Attorney, Agent or Firm:
TODA Yuji (6-1, Marunouchi 1-chome, Chiyoda-k, Tokyo 20, 〒1008220, JP)
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