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公开(公告)号：US10337974B2
公开(公告)日：2019-07-02
申请号：US15569510
申请日：2016-04-12
Applicant: DENSO CORPORATION
Inventor： Tomotaka Mouri , Masayuki Tamura , Masahiro Yamamoto , Go Miyagawa , Hironobu Shimokawa , Kazuhiko Koike
Abstract: A particulate matter detection sensor has an element part for detecting an amount of PM contained in exhaust gas emitted from an internal combustion engine. A deposition part and at least a pair of detection electrodes are formed on an end surface of the element part. Some of particles of PM is deposited on the deposition part. The pair of detection electrodes are arranged on the deposition part. The particulate matter detection sensor changes its output electrical signal according to variation of electrical properties between the pair of the detection electrodes due to deposition of PM on the deposition part. A concave collection part is formed on the deposition part. The concave collection part has a concaved shape when viewed from the edge surface of the element part.
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公开(公告)号：US12174317B2
公开(公告)日：2024-12-24
申请号：US17138681
申请日：2020-12-30
Applicant: DENSO CORPORATION
Inventor： Masahiro Yamamoto , Jiro Momen
IPC: G01S7/481 , B60S1/02 , G01S17/08 , G01S17/931
Abstract: A distance measuring device includes a measuring unit, a controlling unit, and an accessory part. The measuring unit includes an applying unit that applies a transmission wave and a detector that detects a reflected wave resulting from the transmission wave. The controlling unit is configured to perform a measurement, by using the measuring unit, a distance to an object to which the transmission wave is applied. The accessory part is attached to the measuring unit and configured to operate when energized. The controlling unit is configured to control energization of the accessory part in accordance with a state of the measurement of the distance performed by using the measuring unit.
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公开(公告)号：US12034438B2
公开(公告)日：2024-07-09
申请号：US17747198
申请日：2022-05-18
Applicant: DENSO CORPORATION
Inventor： Masahiro Yamamoto , Akimasa Niwa
IPC: H03K17/687 , H03K17/00 , H03K17/081 , H03K17/082 , H03K17/18
CPC classification number: H03K17/687 , H03K17/002 , H03K17/08104 , H03K17/0822 , H03K17/18 , H01L2924/19041 , H03K2217/0054
Abstract: A signal detection circuit includes: a voltage dividing circuit having at least a first pair of voltage dividing capacitors connected in series for dividing an input voltage and configured to output a divided voltage, and a detection circuit configured to detect the divided voltage. The first pair of voltage dividing capacitors are included in one semiconductor device. The semiconductor device includes: (i) a semiconductor substrate, (ii) a first conductor layer, (iii) a first dielectric layer, (iv) a second conductor layer, (v) a second dielectric layer, (vi) a third conductor layer, and (vii) a short-circuit portion configured to short-circuit the first conductor layer and the semiconductor substrate.
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公开(公告)号：US10794811B2
公开(公告)日：2020-10-06
申请号：US15769797
申请日：2016-10-20
Applicant: DENSO CORPORATION
Inventor： Go Miyagawa , Masayuki Tamura , Masahiro Yamamoto , Takashi Araki , Toshihiro Sakawa , Masato Katsuno , Manabu Yoshidome
Abstract: 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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Patent Agency Ranking
公开(公告)号：US10557815B2
公开(公告)日：2020-02-11
申请号：US15759947
申请日：2016-09-14
Applicant: DENSO CORPORATION
Inventor： Masahiro Yamamoto , Masayuki Tamura , Go Miyagawa , Toru Katafuchi , Takehito Kimata , Yuto Tamei
Abstract: A sensor element which has a pair of positive and negative detection electrodes disposed on a surface of an insulation body as a detecting portion and a cover body configured to cover an opening of a cylindrical housing. The cover body is provided with gas inlet and outlet holes via which the measuring gas is introduced and discharged. The pair of detection electrodes have a plurality of wire electrodes. The wire electrodes electrically connected to the positive electrode and the wire electrodes electrically connected to the negative electrode are alternately arranged in parallel. Any one of a first insulation layer which is a narrow electrode interval Dn and a second insulation layer which is a wide electrode interval Dw, arranged between adjacent wire electrodes, and the first insulation layer arranged in a center part of the detecting portion.
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公开(公告)号：US10422295B2
公开(公告)日：2019-09-24
申请号：US15740919
申请日：2016-06-30
Applicant: DENSO CORPORATION
Inventor： Masahiro Yamamoto , Manabu Yoshidome , Masayuki Tamura , Go Miyagawa
IPC: F02D41/22 , F01N3/02 , F01N9/00 , F01N11/00 , F01N13/00 , F01N3/023 , G01N15/06 , F01N3/021 , F02D41/14 , G01N15/00 , G01N3/00 , G01N15/08
Abstract: 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：US11953624B2
公开(公告)日：2024-04-09
申请号：US17645579
申请日：2021-12-22
Applicant: DENSO CORPORATION
Inventor： Masahiro Yamamoto
IPC: G01S7/481 , G01S17/931
CPC classification number: G01S7/4813 , G01S17/931
Abstract: A ranging apparatus is provided which is mountable to a vehicle and includes a transmitter, at least one detector, a light transmissive window, a heater, a snow accumulation condition determiner, a snowfall condition determiner, and a heater controller. The heater works to heat the transmissive window. The snow accumulation condition determiner determines a snow accumulation condition of a surface of the light transmissive window. The snowfall condition determiner determines a snowfall condition around the vehicle. The heater controller works to control energization of the heater depending upon the snow accumulation condition and the snowfall condition. The heater controller stops energizing the heater for a period of time when it is determined that there is neither the snow accumulation on the surface of the light transmissive window nor the snowfall around the vehicle.
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公开(公告)号：US09590616B2
公开(公告)日：2017-03-07
申请号：US14901767
申请日：2014-07-09
Applicant: DENSO CORPORATION
Inventor： Takeshi Inoue , Takahiro Iwamura , Masahiro Yamamoto
IPC: H03K3/00 , H03K17/16 , H02M1/38 , H01L27/06 , H01L27/02 , H01L29/06 , H01L29/739 , H01L29/78 , H03K17/74 , H02M1/00
CPC classification number: H03K17/168 , H01L27/0207 , H01L27/0629 , H01L27/0727 , H01L29/0619 , H01L29/0634 , H01L29/7397 , H01L29/7811 , H01L29/7813 , H02M1/08 , H02M1/38 , H02M2001/0009 , H02M2001/0048 , H02M2001/0051 , H02M2001/0054 , H03K17/166 , H03K17/74 , Y02B70/1491
Abstract: A drive control device for two semiconductor elements having a transistor structure and a diode structure with a common energization electrode includes: a current detection device outputting a current detection signal of the semiconductor elements; and a first control device outputting a gate drive signal from when a first time period has elapsed from a starting time to when a second time period has elapsed from the starting time, at which an off-command signal is input after it is determined that a current flows through the semiconductor elements in a forward direction of the diode structure during a time period for which an on-command signal is input to the semiconductor elements. The first and the second time periods are preliminary set not to generate an arm short-circuit between two semiconductor elements.
Abstract translation: 具有晶体管结构的两个半导体元件和具有公共通电电极的二极管结构的驱动控制装置包括：电流检测装置，输出半导体元件的电流检测信号; 以及第一控制装置，从第一时间段开始经过从开始时刻到经过从执行断开命令信号的第二时间段起经过了第二时间段之后的门驱动信号， 在输入到半导体元件的指令信号的时间段期间，电流在二极管结构的正方向上流过半导体元件。 第一和第二时间段被初步设定为不在两个半导体元件之间产生臂短路。
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公开(公告)号：US10979039B2
公开(公告)日：2021-04-13
申请号：US16503725
申请日：2019-07-05
Applicant: DENSO CORPORATION
Inventor： Masahiro Yamamoto , Akimasa Niwa
IPC: H03K17/00 , H03K17/082 , H03K17/16
Abstract: A gate drive circuit includes a driver for driving a gate of a switching element, a peak voltage detector, and a drive capacity calculator. The peak voltage detector detects a peak voltage at a main terminal of the switching element when the switching element is OFF. The drive capacity calculator calculates a voltage difference value between the detected peak voltage and an allowable voltage value at the main terminal of the switching element, where the allowable voltage is based on the specifications of the switching element. The drive capacity calculator changes a drive capacity of the driver to gradually decrease the difference between the detected peak voltage and the allowable voltage.
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