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1.发明申请公开(公告)号：US20150292422A1
公开(公告)日：2015-10-15
申请号：US14441555
申请日：2013-12-09
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Takashi Tsunooka , Wataru Fukui
CPC classification number: F02D41/0007 , F02B37/18 , F02B37/183 , F02D41/0085 , F02D41/1456 , Y02T10/144
Abstract: An apparatus for detecting inter-cylinder air-fuel ratio imbalance in an engine is provided. The apparatus includes a turbocharger, a bypass passage configured to bypass a turbine of the turbocharger, a waste gate valve configured to selectively close the bypass passage, an air-fuel ratio sensor installed in a portion of an exhaust passage which portion is located on a downstream side of a junction between a downstream side of the turbine and a downstream side of the bypass passage, and a determination unit programmed to compare a value of a degree of fluctuation in an output from the air-fuel ratio sensor or a parameter correlated therewith with a predetermined threshold to perform inter-cylinder air-fuel ratio imbalance determination. The determination unit is programmed not to perform the imbalance determination when an opening degree of the waste gate valve is equal to or higher than a predetermined reference value.
Abstract translation: 提供一种用于检测发动机中的缸内空燃比不平衡的装置。 该装置包括涡轮增压器，旁通通道，其构造成绕过涡轮增压器的涡轮，构造成选择性地关闭旁通通道的废气门阀，安装在排气通道的该部分位于其上的部分的空燃比传感器 在涡轮机的下游侧和旁路通路的下游侧的接合部的下游侧，以及被编程为比较来自空燃比传感器的输出的变动程度的值或与其相关的参数的判定单元 具有预定阈值以执行缸间空燃比不平衡确定。 当废门阀的开度等于或高于预定参考值时，确定单元被编程为不执行不平衡确定。
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公开(公告)号：US10428750B2
公开(公告)日：2019-10-01
申请号：US15589361
申请日：2017-05-08
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Wataru Fukui
Abstract: A control device estimates a leakage gas amount with respect to gas that leaks to an upstream side from a downstream side of a fresh air introduction valve when the fresh air introduction valve is closed. If the leakage gas amount is equal to or greater than a predetermined value when there is a request to open the fresh air introduction valve, a target opening degree of the fresh air introduction valve is determined based on the engine speed and intake pressure, and also a correction opening degree with respect to the target opening degree is calculated based on the leakage gas amount. The fresh air introduction valve is opened to an opening degree greater than the target opening degree by an amount corresponding to the correction opening degree, to thereby cause leakage gas that is accumulated in a fresh air introduction passage to flow into an intake passage together with a required amount of fresh air.
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公开(公告)号：US10006382B2
公开(公告)日：2018-06-26
申请号：US14441555
申请日：2013-12-09
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA , Takashi Tsunooka , Wataru Fukui
Inventor： Takashi Tsunooka , Wataru Fukui
CPC classification number: F02D41/0007 , F02B37/18 , F02B37/183 , F02D41/0085 , F02D41/1456 , Y02T10/144
Abstract: An apparatus for detecting inter-cylinder air-fuel ratio imbalance in an engine is provided. The apparatus includes a turbocharger, a bypass passage configured to bypass a turbine of the turbocharger, a waste gate valve configured to selectively close the bypass passage, an air-fuel ratio sensor installed in a portion of an exhaust passage which portion is located on a downstream side of a junction between a downstream side of the turbine and a downstream side of the bypass passage, and a determination unit programmed to compare a value of a degree of fluctuation in an output from the air-fuel ratio sensor or a parameter correlated therewith with a predetermined threshold to perform inter-cylinder air-fuel ratio imbalance determination. The determination unit is programmed not to perform the imbalance determination when an opening degree of the waste gate valve is equal to or higher than a predetermined reference value.
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