公开(公告)号：US20220406102A1

公开(公告)日：2022-12-22

申请号：US17894749

申请日：2022-08-24

Applicant: DENSO CORPORATION

Inventor： Yuuki TSUCHIYA ,  Masanori KUROSAWA ,  Kou TANAKA ,  Kazuhiro NISHIGAKI

IPC: G07C5/08 ,  G01M15/12

Abstract: A knocking determination device detects a vibration generated in an internal combustion engine during a predetermined period in each combustion cycle of the internal combustion engine. The knocking determination device performs a knocking determination of a presence or absence of a knock based on a vibration waveform in a predetermined frequency band component of the vibration detected.

公开(公告)号：US20150122003A1

公开(公告)日：2015-05-07

申请号：US14521541

申请日：2014-10-23

Applicant: DENSO CORPORATION

Inventor： Kou TANAKA

IPC: F02D41/14 ,  G01M15/10

CPC classification number: F02D41/1495 ,  F02D41/1408 ,  F02D41/1454 ,  F02D41/1476 ,  F02D41/2458 ,  G01M15/102

Abstract: An abnormality diagnosis device is for an exhaust gas sensor that detects an air-fuel ratio, or a rich or lean state of exhaust gas from an internal combustion engine and that includes a sensor element having a catalyst layer. The device includes an abnormality diagnosis unit that makes a sensor abnormality diagnosis whereby to change the air-fuel ratio alternately between a rich side and a lean side and to determine whether the exhaust gas sensor is abnormal or not based on response characteristics of the exhaust gas sensor in response to the change of the air-fuel ratio. When making the sensor abnormality diagnosis, the abnormality diagnosis unit calculates the response characteristics of the exhaust gas sensor with exclusion of a sensor output plateau region, which is a region in which an output of the exhaust gas sensor is stagnant due to the catalyst layer.

Abstract translation: 异常诊断装置用于检测来自内燃机的排气的空燃比或浓或贫状态的废气传感器，其包括具有催化剂层的传感器元件。 该装置包括异常诊断单元，该异常诊断单元进行传感器异常诊断，以便在富侧和贫侧之间交替地改变空燃比，并且基于废气的响应特性来确定排气传感器是否异常 传感器响应于空燃比的变化。 当进行传感器异常诊断时，异常诊断单元排除排气传感器的输出由于催化剂层而停滞的区域的传感器输出平台区域，来计算排气传感器的响应特性。