公开(公告)号：US20180306074A1

公开(公告)日：2018-10-25

申请号：US15765785

申请日：2016-09-26

Applicant: DENSO CORPORATION

Inventor： Ryozo KAYAMA ,  Masanori KUROSAWA

IPC: F01M13/04 ,  F02D35/00 ,  F02M25/08

CPC classification number: F01M13/04 ,  F01M13/00 ,  F01M2013/027 ,  F02D35/00 ,  F02D41/0032 ,  F02D41/22 ,  F02D2200/0414 ,  F02D2250/08 ,  F02M25/0827 ,  F02M25/0836 ,  F02M25/0854 ,  F02M25/0872

Abstract: An abnormality detection device for an engine system detects an abnormality in a fuel vapor pipe connected to an intake pipe of an engine at a portion upstream of a supercharger in a flow direction of intake air. The abnormality detection device includes an intake air temperature sensor and an abnormality detection portion. The intake air temperature sensor is fitted to the intake pipe on an upstream side of the supercharger in the flow direction of intake air and detects a temperature of intake air mixed with fuel vapor introduced into the intake pipe from the fuel vapor pipe. The abnormality detection portion detects an abnormality in the fuel vapor pipe according to a detection value of intake air detected by the intake air temperature sensor.

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：US20180371971A1

公开(公告)日：2018-12-27

申请号：US16063421

申请日：2016-10-28

Applicant: DENSO CORPORATION

Inventor： Kosuke NAKANO ,  Masanori KUROSAWA

IPC: F01M13/00 ,  F02D23/00 ,  F02D41/00 ,  F02M35/10 ,  G01M15/09 ,  G01M15/04

Abstract: A fault detection unit of an internal combustion engine includes a recirculation pipe connected with an upstream-side part of an intake pipe of the internal combustion engine upstream of a supercharger, the recirculation pipe to supply an evaporated fuel that is unburned and is generated in the internal combustion engine to the intake pipe, and a fault detection unit to detect a leakage occurrence of the recirculation pipe based on a crank-case inner pressure of the internal combustion engine when the internal combustion engine is operating in a specified operation condition that the crank-case inner pressure is a positive pressure.

公开(公告)号：US20180291830A1

公开(公告)日：2018-10-11

申请号：US15766032

申请日：2016-09-28

Applicant: DENSO CORPORATION

Inventor： Masanori KUROSAWA ,  Kosuke NAKANO

IPC: F02D41/22 ,  F01M13/02 ,  F02D41/18 ,  F02M25/08

CPC classification number: F02D41/22 ,  F01M13/022 ,  F01M2013/027 ,  F02D41/18 ,  F02D2041/001 ,  F02D2041/224 ,  F02D2200/0406 ,  F02D2200/0414 ,  F02D2200/0418 ,  F02D2250/08 ,  F02M25/06 ,  F02M25/0809 ,  F02M25/0827

Abstract: An ECU functioning as a diagnostic device includes an information acquisition portion acquiring a flow rate of a fluid flowing through an intake pipe, and a diagnostic portion performing a diagnosis on a second purge pipe employed as a fuel gas pipe regarding a connection failure. The diagnostic portion diagnoses a connection failure of the fuel gas pipe according to magnitude of a pulsation of the flow rate acquired by the information acquisition portion.

公开(公告)号：US20180238273A1

公开(公告)日：2018-08-23

申请号：US15752933

申请日：2016-10-25

Applicant: DENSO CORPORATION

Inventor： Yoshinori MAEGAWA ,  Masanori KUROSAWA ,  Kosuke NAKANO

IPC: F02M25/08

CPC classification number: F02M25/0809 ,  F02D41/0007 ,  F02D41/003 ,  F02D41/0045 ,  F02D41/22 ,  F02D2041/225 ,  F02D2200/0406 ,  F02D2250/41 ,  F02M25/08 ,  F02M25/0836 ,  F02M25/089

Abstract: An abnormality detection device of an internal combustion engine includes an ECU that is an abnormality detection unit detecting a leakage occurrence of a second pure pipe. When the internal combustion engine is in a supercharging operation state that a supercharger operates and the second purge pipe is closed by a second purge valve, the ECU detects the leakage occurrence of the second purge pipe based on a differential pressure between a pressure in the second purge pipe and an atmospheric pressure. In this case, the valve pressure in the second purge pipe is a pressure in the second purge pipe between the second purge valve and the intake pipe.