公开(公告)号：US20170315013A1

公开(公告)日：2017-11-02

申请号：US15498768

申请日：2017-04-27

Applicant: DENSO CORPORATION

Inventor： Shoichi TAKEMOTO ,  Shuichi NAKANO ,  Nobuyuki ABE ,  Kenji ITO

IPC: G01L23/10

CPC classification number: G01L23/10

Abstract: A strain sensor is provided which includes a strain sensor, a first housing, a second housing joined to the first housing, and a pressure measuring mechanism firmly retained between the first housing and the second housing. The pressure measuring mechanism is gripped between a first face of the first housing and a second face of the second housing to measure compressive stress exerted by a cylinder head of an internal combustion engine on the first housing and the second housing. This structure improves the reliability of mechanical strength of the housings and the pressure measuring mechanism and provides flexibility in selecting the type of the pressure measuring mechanism.

公开(公告)号：US20200153342A1

公开(公告)日：2020-05-14

申请号：US16745918

申请日：2020-01-17

Applicant: DENSO CORPORATION

Inventor： Masaya TAKAHASHI ,  Nobuhisa YAMAGUCHI ,  Masaki KANESAKI ,  Shoichi TAKEMOTO

IPC: H02M3/337 ,  H02M3/335 ,  H02M7/5395

Abstract: A power inversion apparatus includes a smoothing capacitor, first and second primary coils, a secondary coil, first to fourth switches of bridge circuit switches, a clamp capacitor, and a switch controller. The switch controller calculates a lower-arm duty ratio of each of the first and second switches using a map or a mathematical expression by feed-forward control based on an input voltage. The switch controller outputs a fixed value that is equal to or greater than a maximum value of the lower-arm duty ratio within a variation range of the input voltage as an upper-arm duty ratio of each of the third and fourth switches. The switch controller generates a pulse width modulation signal based on the calculated lower-arm duty ratio and the fixed value of the upper-arm duty ratio, and outputs the pulse width modulation signal to the bridge circuit switches.

公开(公告)号：US20190271468A1

公开(公告)日：2019-09-05

申请号：US16418112

申请日：2019-05-21

Applicant: DENSO CORPORATION

Inventor： Shoichi TAKEMOTO ,  Nobuyuki ABE ,  Kenji ITO

IPC: F23Q7/22 ,  G01L23/22 ,  F02P19/02

Abstract: On an inner wall surface of a plug hole, an internal thread portion and a seat portion are formed. The seat portion has a tapered seat surface. A glow plug with a combustion pressure sensor includes a housing, a glow heater, a load transfer member, and a pressure detector. The housing has an external thread and a seat facing portion. The seat facing portion has a tapered contact surface in surface contact with the tapered seat surface. A recessed portion recessed to be in non-contact with the seat portion is formed annularly about a central axis of the housing.

公开(公告)号：US20190245525A1

公开(公告)日：2019-08-08

申请号：US16267657

申请日：2019-02-05

Applicant: DENSO CORPORATION

Inventor： Masaki KANESAKI ,  Nobuhisa YAMAGUCHI ,  Shoichi TAKEMOTO

IPC: H03K3/02 ,  H02M3/156

CPC classification number: H03K3/02 ,  H02M3/156

Abstract: A pulse power source apparatus that supplies a drive power to a pulse load circuit that periodically generates pulse current constituted of one or more consecutive pulses from the drive power. The pulse power source apparatus includes a DC voltage generation unit generating DC output voltage supplied to the pulse load circuit, and a pulse load drive signal generation unit generating a drive signal that drives the pulse load circuit to generate the pulse current. The DC output voltage which has dropped due to output of the pulse current is controlled such that a timing at which the DC output voltage reaches a reference potential corresponds to a timing at which a subsequent pulse current is generated, the reference potential being a potential capable of generating the pulse.

公开(公告)号：US20170131166A1

公开(公告)日：2017-05-11

申请号：US15343456

申请日：2016-11-04

Applicant: DENSO CORPORATION

Inventor： Shoichi TAKEMOTO ,  Syuichi NAKANO ,  Nobuyuki ABE ,  Kenji ITO ,  Takashi FURUKAWA

IPC: G01L9/00 ,  F23Q7/00

CPC classification number: G01L9/008 ,  F23Q7/001 ,  F23Q2007/002 ,  F23Q2007/005 ,  G01L23/10

Abstract: In a combustion pressure sensor, a sensor holder is installed in a housing. The sensor holder has an end contact surface. A load transfer member is installed in the housing. The load transfer member has a contact surface facing the end contact surface of the sensor holder. The contact surface of the load transfer member is in contact with the end contact surface of the sensor holder. One of the contact surface of the load transfer member and the end contact surface of the sensor holder has a concavely curved shape, and the other thereof has a convexly curved shape.

公开(公告)号：US20200252002A1

公开(公告)日：2020-08-06

申请号：US16776953

申请日：2020-01-30

Applicant: DENSO CORPORATION

Inventor： Shoichi TAKEMOTO

IPC: H02M7/5387

Abstract: A resonant inverter apparatus supplies a high AC voltage to a discharge load. In this apparatus, an inverter circuit converts a DC voltage to an AC voltage using a plurality of switching elements. A transformer steps up the AC voltage and generates a high AC voltage. A DC voltage detecting unit detects a value of a DC voltage supplied to the inverter circuit. A control unit generates a driving pulse for performing on/off switching of the switching elements. The switching elements include first and second switching elements. The control unit performs phase angle control of the driving pulse. In response to the detected value of the DC voltage being greater than a reference value, the control unit sets a switching phase angle of the second switching element relative to the first switching element serving as reference, based on the magnitude of the valued of the DC voltage.

公开(公告)号：US20190165551A1

公开(公告)日：2019-05-30

申请号：US16204006

申请日：2018-11-29

Applicant: DENSO CORPORATION

Inventor： Shoichi TAKEMOTO

IPC: H01T23/00 ,  C01B13/11 ,  F01N9/00

CPC classification number: H01T23/00 ,  C01B13/11 ,  C01B2201/14 ,  C01B2201/20 ,  F01N9/005 ,  F01N2240/38

Abstract: In a discharge generator, a control unit switchably performs a continuous mode and a burst mode based on determination of whether target output power is higher than discharge start power. The burst mode alternately performs a discharge mode and a non-discharge mode. The control unit causes a burst ratio to be set to a value expressed by the following equation b=PO*/Pfs0 where b represents the burst ratio, PO* represents the target output power, and Pfs0represents the discharge start power. The burst ratio is defined as a ratio of the discharge period to a burst period. The burst period is the sum of the discharge period and the stop period. The control unit causes, in the burst mode, the switch circuit to output, as the output power, the discharge start power during the discharge period.

公开(公告)号：US20190123663A1

公开(公告)日：2019-04-25

申请号：US16163937

申请日：2018-10-18

Applicant: DENSO CORPORATION

Inventor： Shoichi TAKEMOTO ,  Hideo NARUSE

IPC: H02M7/48 ,  H02M1/08 ,  H02M7/53846

CPC classification number: H02M7/4826 ,  H02M1/08 ,  H02M7/538466 ,  H02M7/5387 ,  H02M2001/0048 ,  H02M2007/4815

Abstract: In a resonant inverter device, a main circuit is configured to convert input power supplied from a direct-current (DC) power source into alternating-current (AC) power and supply the AC power to a resonance load as output power, and a controller is configured to control operations of the main circuit. In the controller, a deriver is configured to derive a power loss or circuit efficiency of the main circuit as a conversion loss parameter of the main circuit, and an input power calculator is configured to calculate an increased target output value by increasing the target output value using the conversion loss parameter, as a target value of input power that is input to the main circuit. In the controller, an operation controller is configured to control operations of the main circuit such that the calculated target value of the input power is input to the main circuit.

公开(公告)号：US20190089267A1

公开(公告)日：2019-03-21

申请号：US16135039

申请日：2018-09-19

Applicant: DENSO CORPORATION

Inventor： Masaya TAKAHASHI ,  Nobuhisa YAMAGUCHI ,  Masaki KANESAKI ,  Shoichi TAKEMOTO

IPC: H02M7/538 ,  H02M7/5387 ,  H02M7/487

Abstract: In a power conversion apparatus, a controller calculates a duty ratio being a ratio of an on-duration of each of bridge-circuit switches configured by first to fourth switches to a switching period, and outputs a gate signal to each of the bridge-circuit switches. The controller adjusts the duty ratio of each of the bridge-circuit switches such that a switch-current difference becomes closer to a value obtained by multiplying an input-current difference by the predetermined target ratio that is a value greater than 0 and less than 1. The switch-current difference is a difference between a first switch current and a second switch current or a difference between a third switch current and a fourth switch current detected by a switch-current sensor at predetermined timings in the switching period. The input-current difference is a difference between input currents detected by an input-current sensor simultaneously with detection timings of switch currents.