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    INTERNAL COMBUSTION ENGINE
    14.
    发明申请
    INTERNAL COMBUSTION ENGINE 审中-公开

    公开(公告)号：US20170218868A1

    公开(公告)日：2017-08-03

    申请号：US15329780

    申请日：2015-07-28

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

    Inventor： Shuntaro OKAZAKI

    IPC: F02D41/02 ,  F01N3/08 ,  F01N3/20 ,  F02D41/14 ,  F02D41/24

    CPC classification number: F02D41/0295 ,  F01N3/0864 ,  F01N3/20 ,  F02D41/1441 ,  F02D41/1454 ,  F02D41/1475 ,  F02D41/2454 ,  F02D2200/0814

    Abstract: An internal combustion engine comprises: an exhaust purification catalyst; a downstream side air-fuel ratio sensor which is arranged at a downstream side of the exhaust purification catalyst; and an air-fuel ratio control system which performs feedback control so that the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst becomes a target air-fuel ratio. The air-fuel ratio control system switches the target air-fuel ratio to a lean set air-fuel ratio when the air-fuel ratio detected by the downstream side air-fuel ratio sensor becomes a rich judged air-fuel ratio or less; changes the target air-fuel ratio to a slight lean set air-fuel ratio after switching the target air-fuel ratio to the lean set air-fuel ratio and before an estimated value of the oxygen storage amount of the exhaust purification catalyst becomes a switching reference storage amount or more; and switches the target air-fuel ratio to a rich air-fuel ratio when the estimated value of the oxygen storage amount of the exhaust purification catalyst becomes the switching reference storage amount or more.

    Electronically controlled lean out device for mechanical fuel injected engines
    18.
    发明授权
    Electronically controlled lean out device for mechanical fuel injected engines 有权

    公开(公告)号：US09638126B2

    公开(公告)日：2017-05-02

    申请号：US14251468

    申请日：2014-04-11

    Applicant: Delbert Vosburg

    Inventor： Delbert Vosburg

    IPC: F02D41/00 ,  F02D41/14

    CPC classification number: F02D41/1475 ,  F02D41/1456 ,  F02D2400/11

    Abstract: A device for the electronically controlled lean out of mechanical fuel injected engines comprising a wide band air fuel ratio sensor and a printed circuit board (PCB) connected to the wide band air fuel ratio gauge/controller. The printed circuit board (PCB) is connected to the wide band air fuel ratio sensor's power, ground, and signal wires. The computer controlled stepper motor is connected to the printed circuit board (PCB). A variable valve spool is retained in a fuel block and connected to the computer controlled stepper motor. Rotating the variable valve spool continuously adjusts and controls the air fuel ratio of the engine in real time by regulating the amount of fuel returned the fuel tank and the amount of fuel delivered to the barrel valve in a mechanically fuel injected engine. A jet can be used in combination with the fuel bock to further fine tune the fuel flow.

    Control system of internal combustion engine
    19.
    发明授权
    Control system of internal combustion engine 有权
    内燃机控制系统

    公开(公告)号：US09593635B2

    公开(公告)日：2017-03-14

    申请号：US14763653

    申请日：2013-01-29

    Applicant: Norihisa Nakagawa ,  Shuntaro Okazaki ,  Yuji Yamaguchi

    Inventor： Norihisa Nakagawa ,  Shuntaro Okazaki ,  Yuji Yamaguchi

    IPC: F01N3/00 ,  F02D41/14 ,  F02D41/02

    CPC classification number: F02D41/1475 ,  F02D41/0295 ,  F02D41/1439 ,  F02D41/1477

    Abstract: A control device for an internal combustion engine, equipped with: an exhaust purification catalyst capable of storing oxygen; a downstream-side air-fuel ratio sensor arranged downstream in the direction of flow of exhaust from the exhaust purification catalyst; and an air-fuel ratio control device that controls the air-fuel ratio such that air-fuel ratio of the exhaust flowing into the exhaust purification catalyst reaches a target air-fuel ratio. The control device changes the target air-fuel ratio to a lean air-fuel ratio setting when the exhaust air-fuel ratio detected by the downstream-side air-fuel ratio sensor reaches a rich air-fuel ratio, and then changes the target air-fuel ratio to a slightly lean air-fuel ratio setting before the exhaust air-fuel ratio detected by the downstream-side air-fuel ratio sensor reaches a lean air-fuel ratio, and then changes the target air-fuel ratio to a rich air-fuel ratio setting when the exhaust air-fuel ratio detected by the downstream-side air-fuel ratio sensor reaches a lean air-fuel ratio, and then changes the target air-fuel ratio to a slightly rich air-fuel ratio setting before the exhaust air-fuel ratio detected by the downstream-side air-fuel ratio sensor reaches a rich air-fuel ratio.

    Abstract translation: 一种用于内燃机的控制装置，配备有能够存储氧气的排气净化催化剂; 下游侧空燃比传感器，其布置在排气净化催化剂的排气流动方向的下游; 以及空燃比控制装置，其使流入所述排气净化催化剂的排气的空燃比达到目标空燃比来控制所述空燃比。 当由下游侧空燃比传感器检测到的排气空燃比达到浓空燃比时，控制装置将目标空燃比变更为稀空燃比设定，然后将目标空气 - 燃料比与由下游侧空燃比传感器检测到的排气空燃比之前的略微偏空燃比设定达到稀空燃比，然后将目标空燃比变为浓 由下游侧空燃比传感器检测到的排气空燃比达到稀空燃比时的空燃比设定，然后将目标空燃比设定为稍高的空燃比设定 由下游侧空燃比传感器检测到的排气空燃比达到浓空燃比。

    INTERNAL COMBUSTION ENGINE
    20.
    发明申请
    INTERNAL COMBUSTION ENGINE 审中-公开
    内燃机

    公开(公告)号：US20170037802A1

    公开(公告)日：2017-02-09

    申请号：US15227121

    申请日：2016-08-03

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

    Inventor： Yukihiro OKABE ,  Tatsuya TAHARA

    IPC: F02D41/02 ,  F02D41/30 ,  F01N13/00 ,  F01N3/08 ,  F01N9/00

    CPC classification number: F02D41/0295 ,  F01N3/0814 ,  F01N3/0864 ,  F01N9/00 ,  F01N13/008 ,  F01N2570/16 ,  F02D41/126 ,  F02D41/1441 ,  F02D41/1453 ,  F02D41/1455 ,  F02D41/1456 ,  F02D41/1475 ,  F02D41/3005 ,  F02D2041/147

    Abstract: An air-fuel ratio control device switches a target air-fuel ratio from a lean set air-fuel ratio to a rich set air-fuel ratio after judging that an air-fuel ratio of an outflowing exhaust gas has become a stoichiometric air-fuel ratio and an oxygen storage amount of an exhaust purification catalyst has become a switching reference storage amount, and makes an average value of the target air-fuel ratio the stoichiometric air-fuel ratio to less than the lean set air-fuel ratio, from after the estimated value of the oxygen storage amount has become the switching reference storage amount or more until judging that the air-fuel ratio of the outflowing exhaust gas has become the stoichiometric air-fuel ratio if the estimated value of the oxygen storage amount becomes the switching reference storage amount or more before judging that the air-fuel ratio of the outflowing exhaust gas has become the stoichiometric air-fuel ratio.

    Abstract translation: 空燃比控制装置在判定出流出废气的空燃比成为理论空燃比后，将目标空燃比从稀空燃比转换为浓空燃比 比例和排气净化催化剂的氧气存储量已经成为切换基准存储量，并且使理论空燃比的平均值从理论空燃比小于稀空燃比 如果氧气储存量的估计值变为切换，则判断出流出废气的空燃比变为理论空燃比为止，则氧储存量的推定值成为切换基准保持量以上 在判断出流出废气的空燃比变为理论空燃比之前，参考存储量以上。

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