公开(公告)号：US20220403767A1

公开(公告)日：2022-12-22

申请号：US17749147

申请日：2022-05-20

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Sohichi IMAI ,  Yuya YOSHIKAWA ,  Kazuhiro HASEGAWA ,  Yoshifumi MATSUDA ,  Masanao IDOGAWA ,  Takahiro UCHIDA ,  Yuki YABUSHITA

IPC: F01N9/00 ,  F01N3/10 ,  F01N11/00 ,  F01N3/025

Abstract: A control device for an internal combustion engine including an upstream cleaning device and a downstream cleaning device that are provided in an exhaust gas passage and a temperature sensor that detects a temperature of exhaust gas between the upstream cleaning device and the downstream cleaning device is provided. The control device includes a first temperature estimating unit configured to estimate a temperature of the downstream cleaning device from the temperature of exhaust gas detected by the temperature sensor and a second temperature estimating unit configured to estimate a temperature of the downstream cleaning device without using the temperature of exhaust gas detected by the temperature sensor. An abnormality determining process for the upstream cleaning device is performed when at least the temperature of the downstream cleaning device estimated by the second temperature estimating unit is equal to or greater than a predetermined threshold value.

公开(公告)号：US20170298889A1

公开(公告)日：2017-10-19

申请号：US15481847

申请日：2017-04-07

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Naoya OKUBO ,  Kazuhiro HASEGAWA

IPC: F02M69/54 ,  F02D41/22 ,  F02M57/00

CPC classification number: F02M69/54 ,  F02D41/042 ,  F02D41/222 ,  F02D41/3082 ,  F02D41/3854 ,  F02D2041/223 ,  F02D2200/0602 ,  F02D2200/501 ,  F02M57/005

Abstract: A fuel pressure sensor diagnosis device includes an electronic control unit configured to drive a fuel supply device during electric traveling of a hybrid vehicle, to perform determination as to whether an output of a fuel pressure sensor is within a normal range after driving of the fuel supply device is started, and to perform a diagnosis to determine whether a malfunction has occurred in the fuel pressure sensor based on a result of the determination, the normal range being an assumed range of the output of the fuel pressure sensor in a case where the fuel pressure sensor normally functions and the fuel supply pressure is a prescribed upper limit pressure.

公开(公告)号：US20240263594A1

公开(公告)日：2024-08-08

申请号：US18446474

申请日：2023-08-09

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Kazuhiro HASEGAWA

IPC: F02D41/22 ,  F02D41/00 ,  F02D41/14

CPC classification number: F02D41/222 ,  F02D41/0002 ,  F02D41/1439 ,  F02D41/1454

Abstract: A controller for an internal combustion engine is provided. A control circuit performs active control for an air-fuel ratio of exhaust gas. During execution of the active control, an increasing process for increasing an intake air amount is executed. During execution of the active control, a cumulated intake air amount is calculated. A sensor detects the air-fuel ratio. It is determined whether an anomaly has occurred in the sensor during execution of the active control. A maximum execution period of a sensor diagnostic process is set to a period for the cumulated intake air amount to reach a specified threshold value. The increasing process is prohibited during the execution of the sensor diagnostic process.