公开(公告)号：US20200224575A1

公开(公告)日：2020-07-16

申请号：US16832433

申请日：2020-03-27

Applicant: DENSO CORPORATION

Inventor： Yuki MURAYAMA ,  Ryozo KAYAMA ,  Yusuke TODO ,  Manabu YOSHIDOME

IPC: F01N11/00 ,  G01N27/41 ,  C25B1/04

Abstract: A microcomputer includes a voltage application unit that selectively applies a normal voltage and a removal voltage higher than the normal voltage to a first cell of the exhaust gas sensor. The first cell is configured to remove, based on the removal voltage, oxygen in an exhaust gas from an internal combustion engine. The microcomputer includes an element temperature measurement unit that measures an element temperature parameter indicative of a temperature of the first cell. The microcomputer includes a termination determination unit that determines, based on the element temperature parameter, a termination time of terminating the application of the removal voltage to the first cell by the voltage application unit.

公开(公告)号：US20140361678A1

公开(公告)日：2014-12-11

申请号：US14300624

申请日：2014-06-10

Applicant: DENSO CORPORATION

Inventor： Yuki MURAYAMA

IPC: H01T13/20

CPC classification number: H01T13/32

Abstract: A spark plug for an internal-combustion engine. The spark plug includes a central electrode, an insulator that holds the central electrode inside, a housing that holds the insulator inside, a ground electrode that forms a spark gap with the central electrode. The ground electrode includes a ground base member connected to the housing, and a ground protrusion protruding from a confronting face of the ground base member confronting the central electrode. The ground protrusion has a diameter of 0.9 to 1.4 mm. The spark plug is configured to satisfy θ≧−53 R+49, where R[mm] is a curvature radius of a base member corner and θ[degrees] is an angle formed by a shortest connecting line between the base member corner and a protrusion corner and a plane perpendicular to an axial direction of the ground protrusion.

Abstract translation: 内燃机火花塞。 火花塞包括中心电极，将中心电极保持在内部的绝缘体，将绝缘体保持在内部的壳体，与中心电极形成火花隙的接地电极。 接地电极包括连接到壳体的接地基座构件和从面对中心电极的接地基座的相对面突出的接地突起。 接地突起的直径为0.9〜1.4mm。 火花塞被配置为满足以下要求：≧-53R + 49，其中R [mm]是基座部件角的曲率半径和角度; [度]是由基部件角部之间的最短连接线形成的角度 以及与所述接地突起的轴向垂直的突出角和平面。

公开(公告)号：US20190219537A1

公开(公告)日：2019-07-18

申请号：US16250151

申请日：2019-01-17

Applicant: DENSO CORPORATION

Inventor： Shoki SHIMIZU ,  Ryozo KAYAMA ,  Tadakatsu KOYABU ,  Yuki MURAYAMA

IPC: G01N27/416 ,  F02D41/22 ,  F02D41/14 ,  G01M15/10 ,  G01N27/41 ,  G05B19/042

CPC classification number: G01N27/4163 ,  F02D41/146 ,  F02D41/1488 ,  F02D41/222 ,  G01M15/102 ,  G01N27/41 ,  G05B19/042

Abstract: In a control device for an exhaust gas sensor, a deterioration determination section determines whether the magnitude of a signal outputted from a second cell has exceeded a threshold to thereby determine whether a first cell has deteriorated. A threshold setting section variably sets the threshold depending on a concentration of the oxygen in the exhaust gas.

公开(公告)号：US20190136785A1

公开(公告)日：2019-05-09

申请号：US16178858

申请日：2018-11-02

Applicant: DENSO CORPORATION

Inventor： Yuki MURAYAMA ,  Fumiya NAGATA

IPC: F02D41/22 ,  F01N13/00 ,  F01N11/00

CPC classification number: F02D41/222 ,  F01N11/002 ,  F01N11/007 ,  F01N13/008 ,  F01N2550/00 ,  F01N2560/026 ,  F01N2560/06 ,  F01N2900/0416 ,  F01N2900/1402 ,  F02D41/146 ,  F02D41/1494

Abstract: A control apparatus is provided for controlling an exhaust gas sensor. The exhaust gas sensor includes a first cell, a second cell configured to output electric current depending on the concentration of a measurement target component in exhaust gas from which oxygen has been removed by the first cell, and a heater configured to heat the first and second cells. The control apparatus includes a heater controlling unit, a current detecting unit configured to detect the electric current outputted from the second cell, and a deterioration determining unit. The deterioration determining unit causes the heater controlling unit to change output of the heater and thereby changes the temperature of the first cell. During the change in the output of the heater, the deterioration determining unit determines, based on an amount of change in the electric current detected by the current detecting unit, whether or not the second cell is deteriorated.

公开(公告)号：US20180038335A1

公开(公告)日：2018-02-08

申请号：US15668791

申请日：2017-08-04

Applicant: DENSO CORPORATION

Inventor： Kaori DOI ,  Akimitsu SUGIURA ,  Fumiaki AOKI ,  Noriaki NISHIO ,  Yuki MURAYAMA

IPC: F02P3/05

CPC classification number: F02P3/05 ,  F02D2009/0277 ,  F02D2041/227 ,  F02P3/0407 ,  F02P3/0435 ,  F02P3/0442 ,  F02P5/145 ,  F02P9/007 ,  F02P15/08 ,  F02P17/12 ,  F02P2017/121 ,  G01R19/165

Abstract: An ignition control system is applied to an internal combustion engine having an ignition coil, a switching element and a measurement detection part which detects at least one of a primary and a secondary voltages and a secondary current. The ignition coil has a primary coil and a secondary coil. The switching element performs conduction and interruption the primary current to the primary coil. The ignition control system has a primary current control unit generating a spark discharge at the ignition plug by passing the primary current through the primary coil, and perform interruption of the primary current, and a discharge short-circuiting determination part determining a generation of discharge short-circuiting based on a measured value. The primary current control unit generates the spark discharge again when discharge short-circuiting occurs.

公开(公告)号：US20200264127A1

公开(公告)日：2020-08-20

申请号：US16782404

申请日：2020-02-05

Applicant: DENSO CORPORATION

Inventor： Shoki SHIMIZU ,  Ryozo KAYAMA ,  Yuki MURAYAMA

IPC: G01N27/419 ,  G01N27/41 ,  G01N27/406 ,  G01N27/407 ,  G01N33/00

Abstract: A first cell includes a first electrode in a measurement gas chamber and a second electrode in a reference gas chamber. A second cell includes a third electrode in the measurement gas chamber and a fourth electrode in the reference gas chamber to cause a current therebetween that corresponds to a concentration of a specific gas component in detected gas in the measurement chamber. A controller selectively implements a normal control and a reduction control. The normal control is to apply a lower voltage to the first electrode and the second electrode to remove oxygen from the detected gas. The reduction control is to apply a higher voltage to the first electrode and the second electrode to reduce the third electrode that is oxidized. The controller prohibits implementation of the reduction control on determination that implementation of the reduction control.

公开(公告)号：US20180340909A1

公开(公告)日：2018-11-29

申请号：US15988329

申请日：2018-05-24

Applicant: DENSO CORPORATION

Inventor： Tadakatsu KOYABU ,  Tomoo KAWASE ,  Yuki MURAYAMA ,  Ryozo KAYAMA ,  Akari HASEGAWA ,  Shoki SHIMIZU

IPC: G01N27/416 ,  G01M15/10 ,  F01N11/00 ,  G01N27/406 ,  G01N27/407 ,  G01N27/41 ,  G01N27/419 ,  G01N27/409 ,  G01N27/417

Abstract: In a gas sensor, a pump cell adjusts a concentration of oxygen in a gas chamber based of a pump cell supply voltage. A sensor cell detects a concentration of a specific gas in a detection target gas after the pump cell has adjusted the concentration of oxygen. In a sensor control unit, a voltage switching part adjusts the pump cell supply voltage to be supplied to the pump cell. A pump cell output control part adjusts a variation range of a pump cell output current of the pump cell before and after a voltage switching process of the pump cell supply voltage to be within a predetermined variation range. A deteriorated state detection part detects a deteriorated state ratio of the sensor cell based on variation of an output current of the sensor cell due to the voltage switching process performed by the voltage switching part.

公开(公告)号：US20140049151A1

公开(公告)日：2014-02-20

申请号：US13969868

申请日：2013-08-19

Applicant: ISHIFUKU METAL INDUSTRY CO., LTD. ,  DENSO CORPORATION

Inventor： Yuki MURAYAMA ,  Nobuo ABE ,  Yoshinori DOI ,  Toshiyuki TOMINE ,  Shunsuke YOKOTA

IPC: H01T13/39

CPC classification number: H01T13/39

Abstract: A spark plug has a center electrode and an earth electrode. The center electrode is faced to the earth electrode so that a spark discharging gap is formed between the center electrode and the earth electrode. An electrode chip is formed on at least one of the center electrode and the earth electrode. The electrode chip has a composition comprised of 40 to 60 mol % of aluminum and iridium as a remainder thereof. In the composition of the electrode chip, it is possible to replace part of the iridium with 1 to 20 mol % of at least one metal selected from nickel, iron, cobalt, platinum and rhodium.

Abstract translation: 火花塞具有中心电极和接地电极。 中心电极面对接地电极，从而在中心电极和接地电极之间形成火花放电间隙。 电极芯片形成在中心电极和接地电极中的至少一个上。 电极芯片具有40〜60摩尔％的铝和作为其余部分的铱的组成。 在电极芯片的组成中，可以用1〜20摩尔％的选自镍，铁，钴，铂，铑中的至少一种金属代替部分铱。

公开(公告)号：US20200249124A1

公开(公告)日：2020-08-06

申请号：US16775393

申请日：2020-01-29

Applicant: DENSO CORPORATION

Inventor： Yuki MURAYAMA ,  Shoki SHIMIZU ,  Hiroki ICHIKAWA ,  Akari HASEGAWA

IPC: G01M15/10 ,  G01N27/406 ,  G01N27/407

Abstract: A control device performs deterioration diagnosis of a gas sensor including a pump cell and a sensor cell. The control device includes a control unit, a determination value acquisition unit, a diagnosis unit, and a correction unit. The control unit temporarily reduces the oxygen removal capability of the pump cell. The determination value acquisition unit acquires an output ratio of the sensor cell based on an output value of the sensor cell in a state where the oxygen removal capability of the pump cell is temporarily reduced. The diagnosis unit performs deterioration diagnosis of the gas sensor by comparing the output ratio with a determination threshold. The correction unit sets a correction coefficient based on an atmospheric pressure and an oxygen concentration, and also corrects the output ratio using the correction coefficient.

公开(公告)号：US20200224600A1

公开(公告)日：2020-07-16

申请号：US16832521

申请日：2020-03-27

Applicant: DENSO CORPORATION

Inventor： Yuki MURAYAMA ,  Ryozo KAYAMA ,  Yusuke TODO ,  Manabu YOSHIDOME

IPC: F02D41/14 ,  F01N11/00

Abstract: It is to determine whether a temperature rise condition of a first cell or a second cell is satisfied based on whether a first parameter has exceeded a predetermined first threshold or a second parameter has exceeded a predetermined second threshold. After satisfaction of the temperature rise condition, it is to determine that an exhaust gas sensor is in an active state upon determination that a corresponding time condition is satisfied.