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公开(公告)号：US20180313739A1
公开(公告)日：2018-11-01
申请号：US15769797
申请日：2016-10-20
申请人： DENSO CORPORATION
发明人： Go MIYAGAWA , Masayuki TAMURA , Masahiro YAMAMOTO , Takashi ARAKI , Toshihiro SAKAWA , Masato KATSUNO , Manabu YOSHIDOME
摘要： An apparatus which detects particulate matter is provided. This apparatus estimates a volume of water inside an exhaust passage using estimation sections. When an estimated volume of water is larger than a water drainage threshold, an element portion is heated using a heater by the first temperature range controller, in a temperature range which resists water-induced cracking independent of a volume of water droplets. If the estimated volume of water is less than a water drainage threshold, the water drainage determination section determines that the water drainage of the exhaust passage is completed. Additionally, if it is estimated that the water drainage is completed, the element portion is heated by a second temperature controller at temperature lower than a starting temperature of combustion of particulate matter and in order to repel water adhered onto the element portion in a water-repellent temperature range for a predetermined period.
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公开(公告)号：US20180313243A1
公开(公告)日：2018-11-01
申请号：US15769794
申请日：2016-10-21
申请人： DENSO CORPORATION
发明人： Masayuki TAMURA , Takashi ARAKI , Masahiro YAMAMOTO , Go MIYAGAWA , Manabu YOSHIDOME , Masato KATSUNO , Toshihiro SAKAWA
摘要： A particulate matter detecting device includes: an element unit on which particulate matter contained in exhaust gas from an internal combustion engine is deposited; a heater that heats the element unit; a detecting unit that detects the amount of particulate matter on the basis of electrical characteristics of the element unit; and a control unit that controls the operation of the heater. For a predetermined period that does not include a period in which the particulate matter is deposited on the element unit, the control unit operates the heater using a predetermined amount of control set in advance such that the temperature of the element unit is higher than the temperature of the exhaust gas and lower than a predetermined temperature at which the element unit is thermally degraded.
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公开(公告)号：US20150211405A1
公开(公告)日：2015-07-30
申请号：US14607666
申请日：2015-01-28
申请人： DENSO CORPORATION
发明人： Manabu YOSHIDOME , Masato KATSUNO
IPC分类号： F01N11/00
CPC分类号： F01N11/00 , F01N2550/04 , F01N2560/05 , F01N2900/1606 , Y02T10/47
摘要： A filter fault detection apparatus for a filter mounted on an exhaust passage of an internal combustion engine for collecting particulate matter includes a sensor mounted on the exhaust passage downstream of the filter. The sensor includes an insulative sensor element formed with a pair of electrodes on which particulate matter is collected, the sensor generating a sensor output corresponding to an amount of particulate matter collected on the sensor element when the electrodes become electrically conductive therebetween, causing the sensor output to rise. The apparatus further includes an acquiring unit that acquires, as an output variation, a temporal variation of the sensor output after rise of the sensor output, and a fault determination unit that performs a fault detection process for detecting presence of a fault in the filter based on the output variation of the sensor output to determine whether the filter is normal or faulty.
摘要翻译： 用于安装在用于收集颗粒物质的内燃机的排气通道上的过滤器的过滤器故障检测装置包括安装在过滤器下游的排气通道上的传感器。 传感器包括形成有一对电极的绝缘传感器元件，在该对电极上收集颗粒物质，当电极在其间导电时，传感器产生对应于在传感器元件上收集的颗粒物质的量的传感器输出，导致传感器输出 上升 该装置还包括获取单元，其作为输出变化获取传感器输出上升之后的传感器输出的时间变化，以及故障确定单元，其执行用于检测基于滤波器的故障的存在的故障检测处理 关于传感器输出的输出变化，以确定滤波器是正常还是有故障。
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公开(公告)号：US20200224575A1
公开(公告)日：2020-07-16
申请号：US16832433
申请日：2020-03-27
申请人： DENSO CORPORATION
发明人： Yuki MURAYAMA , Ryozo KAYAMA , Yusuke TODO , Manabu YOSHIDOME
摘要： 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.
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公开(公告)号：US20180306087A1
公开(公告)日：2018-10-25
申请号：US15769801
申请日：2016-10-21
申请人： DENSO CORPORATION
发明人： Takashi ARAKI , Masayuki TAMURA , Masahiro YAMAMOTO , Go MIYAGAWA , Toshihiro SAKAWA , Masato KATSUNO , Manabu YOSHIDOME
CPC分类号： F01N11/00 , F01N3/00 , F01N3/023 , F01N3/18 , F01N9/002 , F01N2550/04 , F01N2900/14 , F01N2900/1602 , F01N2900/1606
摘要： A particulate matter detection apparatus is provided with an element portion onto which PM contained in exhaust gas of an engine adheres thereto. A heater which heats the element portion, a quantity detecting portion which detects a quantity of the PM based on electrical properties of the element portion and a temperature detecting portion which detects a temperature of the element portion. The apparatus is further provided with a first and second temperature controller. The first temperature controller heats the element portion using a heater in a first period, which excludes a period in which PM adheres to the element portion based on a detected temperature of the element portion. The element portion is heated in a first temperature range to combust soluble organic fractions contained in the PM and resist melting of ash components contained in the PM. The first period excludes a period in which PM adheres to the element portion. The second temperature controller heats the element portion in the second temperature range, which is higher than the first temperature range using the heater, such that ash is combusted, based on a detected temperature of the element portion.
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公开(公告)号：US20180187623A1
公开(公告)日：2018-07-05
申请号：US15740919
申请日：2016-06-30
申请人： DENSO CORPORATION
摘要： A filter malfunction determination apparatus includes a calculator that calculates, upon determination that a rapid output increase has occurred, an amount of change of a parameter value output from a sensor before and after the rapid output increase. The calculator calculates, based on the calculated amount of change, a correction value for correcting at least one of the parameter value output from the sensor and a malfunction determination threshold. The filter malfunction determination apparatus includes an offset corrector configured to perform, based on the correction value, offset correction of at least one of the parameter value output from the sensor and the malfunction determination threshold after determination that the rapid output increase has occurred.
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公开(公告)号：US20200224600A1
公开(公告)日：2020-07-16
申请号：US16832521
申请日：2020-03-27
申请人： DENSO CORPORATION
发明人： Yuki MURAYAMA , Ryozo KAYAMA , Yusuke TODO , Manabu YOSHIDOME
摘要： 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.
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公开(公告)号：US20190032588A1
公开(公告)日：2019-01-31
申请号：US16070894
申请日：2017-01-18
申请人： DENSO CORPORATION
发明人： Masahiro YAMAMOTO , Masayuki TAMURA , Takashi ARAKI , Go MIYAGAWA , Manabu YOSHIDOME , Masato KATSUNO , Toshihiro SAKAWA
摘要： After an engine is started, an ECU performs first regeneration processing of a PM sensor through heating by a heater and, after the first regeneration processing, applies a voltage continuously to detection electrodes for a predetermined voltage application period. The ECU causes PM to adhere to an insulating substrate due to the voltage application and, at a time point after the predetermined time period has elapsed, determines the amount of PM that is adhering to the insulating substrate. When a predetermined condition is satisfied outside the voltage application period, the ECU determines whether the amount of adhering PM on the insulating substrate is equal to or greater than an excess determination threshold value. If the amount of adhering PM is determined to be equal to or greater than the excess determination threshold value, the ECU performs second regeneration processing of the PM sensor, through heating by the heater.
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公开(公告)号：US20170307501A1
公开(公告)日：2017-10-26
申请号：US15516163
申请日：2015-10-02
申请人： DENSO CORPORATION
摘要： A control unit (6) estimates an output value of a PM sensor (S2) located at a downstream side of a DPF used as a reference filter, and detects whether the estimated output value exceeds a predetermined value (S3). When the estimated output value exceeds the predetermined value (YES in S3), the control unit detects an output value of the PM sensor (S4), and a heater heats the PM sensor (S5). The control unit detects an output value of the PM sensor (S6) after the PM sensor is heated, and calculates a change ratio of the output values of the PM sensor before and after heating (S7). The control unit estimates an average particle size of PM based on the calculated change ratio (S8), and detects whether the DPF has failed based on a comparison result of a corrected output value of the PM sensor with a threshold value.
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