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公开(公告)号：US20190024600A1
公开(公告)日：2019-01-24
申请号：US16066807
申请日：2016-11-16
发明人： Yoshihiko AKAGI , Seiji ASANO , Kazuhiro ORYOJI
摘要： Fuel injection control of an internal combustion engine requires an optimized fuel amount that can be burned completely with oxygen in intake air to be supplied, but the oxygen concentration in the atmospheric air is affected by humidity.By separately calculating a dry air flow rate that directly affects the oxygen amount and a humidity flow rate that is a change factor of the oxygen concentration in the intake air of the internal combustion engine, the fuel can be supplied to the cylinder of the internal combustion engine at an optimized air-fuel ratio. In addition, highly precise control involving EGR for flowback of a part of the exhaust gas flowing in the exhaust pipe to the intake pipe can also be achieved.
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公开(公告)号：US20210207550A1
公开(公告)日：2021-07-08
申请号：US16071421
申请日：2017-01-12
发明人： Yoshihiko AKAGI , Masashi SEIMIYA , Seiji ASANO , Wataru KATOU , Masanori NUKUI , Masahiro SATO
摘要： Provided is a knocking detection apparatus capable of reducing erroneous determination of knocking during transition, and improving knocking detection accuracy regardless of whether an engine is in steady operation or transient operation. A knocking detection apparatus according to the present invention estimates a background level based on an operating state of an internal combustion engine, and calculates a knocking determination index by using the estimated value.
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公开(公告)号：US20180195451A1
公开(公告)日：2018-07-12
申请号：US15741604
申请日：2016-07-06
发明人： Shinya MATOHARA , Yoshihiko AKAGI , Seiji ASANO , Kazuhiro ORYOJI
CPC分类号： F02D41/144 , F02D41/0002 , F02D41/0042 , F02D41/0045 , F02D41/0072 , F02D41/0077 , F02D41/04 , F02D41/14 , F02D43/00 , F02D45/00 , F02D2200/0418 , F02M25/08 , F02M26/46 , F02P5/15 , F02P5/1516
摘要： An EGR rate estimation method using an EGR valve opening area involves aggravated EGR rate estimation accuracy as an EGR valve is deteriorated and is unable to satisfy required accuracy when a target EGR rate is high. With a method for correcting a fuel injection amount by a fuel injection valve through estimation of a purge air-fuel ratio on the basis of variations in an air-fuel ratio variable depending on whether purging is performed, the fuel injection correction fails to accommodate the change in the air-fuel ratio when concentration of fuel evaporative emissions adsorbed by an activated carbon of a canister is high, resulting in reduced conversion efficiency of a catalyst. An arrangement includes an introduction port that is disposed in an intake pipe and through which a gas other than fresh air flows in the intake pipe and humidity sensors disposed upstream and downstream, respectively, of the introduction port. The EGR rate or the purge air-fuel ratio in the intake pipe is estimated using detection values of the respective humidity sensors.
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