公开(公告)号：US20190323447A1

公开(公告)日：2019-10-24

申请号：US16382388

申请日：2019-04-12

Applicant: DENSO CORPORATION

Inventor： Masashi INABA ,  Noboru NAGASE ,  Taichi WATANABE

IPC: F02D41/36 ,  F02M21/02 ,  F02D41/20 ,  F02D41/24

Abstract: An injection control device controls a solenoid in a fuel injection valve. The injection control device includes a transistor on an upstream side of a first power supply path to the solenoid and a transistor on an upstream side of a second power supply path to the solenoid. The injection control device has another transistor with a body diode arranged in parallel at a position on the first power supply path between the first transistor and an upstream terminal of the solenoid. The injection control device also includes a transistor on the downstream side of the first and second power supply paths. A drive controller in the injection control device drives the solenoid to an open position by switching ON the transistor on the downstream side and the transistor on the upstream side of the first power supply path or the transistor on the upstream side of the second power supply path.

公开(公告)号：US20190326044A1

公开(公告)日：2019-10-24

申请号：US16382438

申请日：2019-04-12

Applicant: DENSO CORPORATION

Inventor： Masashi INABA ,  Noboru NAGASE ,  Taichi WATANABE

IPC: H01F7/06 ,  F02M51/00

Abstract: An injection control device controls a solenoid in a fuel injection valve. The injection control device includes a transistor on an upstream side of a first power supply path to the solenoid, and a transistor on an upstream side of a second power supply path to the solenoid. The injection control device has another transistor with a body diode arranged in parallel at a position between an upstream terminal of the solenoid and ground. The injection control device also includes a transistor on the downstream side of the first and second power supply paths. A drive controller in the injection control device drives the solenoid to an open position by switching ON the transistor on the downstream side and one of the transistors on the upstream side power supply paths.

公开(公告)号：US20170244240A1

公开(公告)日：2017-08-24

申请号：US15426134

申请日：2017-02-07

Applicant: DENSO CORPORATION

Inventor： Taichi WATANABE

IPC: H02H7/20 ,  H03K7/08 ,  H03K17/082

CPC classification number: H02H7/205 ,  H02H5/048 ,  H02H7/008 ,  H03K7/08 ,  H03K17/082 ,  H03K17/0822 ,  H03K17/18 ,  H03K2017/0806

Abstract: When a temperature is less than a first threshold, a protection circuit unit executes a normal operation by a pulse width modulation. When the temperature is greater than or equal to the first threshold and is less than a second threshold, the protection circuit unit executes a first heat dissipation suppressing operation that suppresses a self-heating of a switching element. When the temperature is greater than or equal to the second threshold, the protection circuit unit executes a full off operation that terminates the switching element. When the temperature is decreased to be less than the first threshold and to be greater than or equal to a third threshold after the temperature becomes greater than or equal to the second threshold, the protection circuit unit executes a second heat dissipation suppressing operation that suppresses a heat dissipated due to an energization of the switching element.

公开(公告)号：US20230009483A1

公开(公告)日：2023-01-12

申请号：US17944562

申请日：2022-09-14

Applicant: DENSO CORPORATION

Inventor： Taichi WATANABE ,  Hiroyuki AKUZAWA ,  Amane HIGASHI

IPC: G01F15/02 ,  F02M35/10

Abstract: A measurement control device includes a sensing unit and a low-pass filter unit. The sensing unit outputs an air flow rate value corresponding to an air flow rate flowing through a flow path. The low-pass filter unit removes high-frequency components included in the air flow rate value input from the sensing unit. The measurement control device calculates a pulsation state that is a state of a pulsation occurring in the air flow rate based on the air flow rate value that has passed through the low-pass filter unit. The measurement control device corrects the air flow rate value using the pulsation state.

公开(公告)号：US20220155119A1

公开(公告)日：2022-05-19

申请号：US17666119

申请日：2022-02-07

Applicant: DENSO CORPORATION

Inventor： Taichi WATANABE

IPC: G01F1/684 ,  G01F1/696 ,  G01F15/14 ,  F02M35/10

Abstract: In a flow rate measurement device, a flow rate sensing device outputs a signal which corresponds to a flow rate of air flowing in a flow rate measurement passage, and a physical quantity sensing device outputs a signal which corresponds to a physical quantity of the air flowing in a physical quantity measurement passage communicated with a physical quantity measurement passage inlet and a physical quantity measurement passage outlet at a housing. The physical quantity measurement passage has a physical quantity measurement passage inner surface formed at a part of the physical quantity measurement passage located on a side where a back surface is placed. The physical quantity measurement passage outlet has an outlet rectifying surface that is connected to a lateral surface of the housing and an end part of the physical quantity measurement passage inner surface located on a side where the lateral surface is placed.

公开(公告)号：US20220333547A1

公开(公告)日：2022-10-20

申请号：US17655667

申请日：2022-03-21

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  DENSO CORPORATION

Inventor： Takafumi YAMADA ,  Hiroyuki AKUZAWA ,  Noboru KITAHARA ,  Takashi OOGA ,  Taichi WATANABE

IPC: F02D41/24

Abstract: A data processing method of variable measurement data in an electronic control unit (ECU) is provided. The ECU that processes the data processing method calculates a filtering frequency based on a delay time frequency based on a transmission timing cycle of the measurement data and a processing timing cycle of the measurement data in the ECU, and also based on a pulsation frequency of the measurement data, and removes, from the measurement data, a component of the filtering frequency calculated in the calculation of the filtering frequency.

公开(公告)号：US20220326058A1

公开(公告)日：2022-10-13

申请号：US17847626

申请日：2022-06-23

Applicant: DENSO CORPORATION

Inventor： Hiroyuki AKUZAWA ,  Taichi WATANABE ,  Amane HIGASHI

IPC: G01F1/72 ,  G01F1/69

Abstract: A measurement control device includes: a sensing unit that outputs a signal according to an air flow rate; a pulsation state calculation unit that calculates a pulsation state of pulsation generated in the air flow rate using an output value of the sensing unit; and a pulsation error correction unit that corrects the air flow rate. The pulsation state calculation unit has an upper extreme value determination unit and a frequency calculation unit. The upper extreme value determination unit cancels the upper extreme value that has presently appeared, when the output value remains to be more than a predetermined lower threshold. The upper extreme value determination unit updates the lower threshold on a basis of at least one of air flow rate, pulsation frequency, or pulsation amplitude specified on the basis of the output value.

公开(公告)号：US20220309129A1

公开(公告)日：2022-09-29

申请号：US17579961

申请日：2022-01-20

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  DENSO CORPORATION

Inventor： Takafumi YAMADA ,  Hiroyuki AKUZAWA ,  Noboru KITAHARA ,  Taichi WATANABE

IPC: G06F17/18 ,  G01M15/04

Abstract: A data processing method is a data processing method in which variable measurement data transmitted from a sensor at a first cycle is computationally processed at a second cycle that is longer than the first cycle. The measurement data is acquired in a third cycle that is longer than the first cycle and shorter than the second cycle, an average value of the acquired measurement data is calculated at the second cycle, and computation processing thereof is performed.

公开(公告)号：US20190323466A1

公开(公告)日：2019-10-24

申请号：US16382549

申请日：2019-04-12

Applicant: DENSO CORPORATION

Inventor： Masashi INABA ,  Noboru NAGASE ,  Taichi WATANABE

IPC: F02M59/46

Abstract: An injection control device controls a drive of a solenoid in a high pressure pump for pressurizing fuel to an internal combustion engine. The injection control device includes a transistor on an upstream side of a power supply path from a direct current power supply line to the solenoid and a transistor provided on a downstream side of the power supply path. The injection control device further includes a diode at a position between an upstream terminal of the solenoid and ground, a transistor arranged in parallel with the diode, and a drive controller. The drive controller drives the solenoid to an open position by switching ON the transistors on the upstream and downstream sides of the power supply path.