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公开(公告)号：US20220128389A1
公开(公告)日：2022-04-28
申请号：US17422795
申请日：2020-01-23
Applicant: Hitachi Astemo, Ltd.
Inventor： Akira UENODAN , Satoshi NODA , Naoki SAITO , Masamichi NAKAMURA , Takahiro MIKI , Nobuaki GORAI , Takayuki ISHIKAWA
IPC: G01F1/684
Abstract: Provided is a physical quantity detection device capable of improving noise performance of a flow rate detection unit as compared with the related art. The physical quantity detection device 20 includes a plate-like chip package 208 that is arranged to protrude from the flow path of the measurement target gas and has a width W along the flow direction of the measurement target gas. The chip package 208 includes a flow rate detection unit 205, an accelerating flow path 208c, a measurement surface 208a, a non-measurement surface 208b, and a separation flow portion 208d. The cross sectional area of the accelerating flow path 208c is reduced, and the flow rate detection unit 205 is arranged. The separation flow portion 208d partitions the second sub-passage 234b into a measurement flow path facing the measurement surface 208a and a non-measurement flow path facing the non-measurement surface 208b. In the width direction Dw of the chip package 208, the end portion 208ce of the accelerating flow path 208c and the end portion 208de of the separation flow portion 208d are separated from each other.
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公开(公告)号：US20220307876A1
公开(公告)日：2022-09-29
申请号：US17595251
申请日：2020-06-12
Applicant: Hitachi Astemo, Ltd.
Inventor： Masamichi NAKAMURA , Akira UENODAN , Takahiro MIKI , Nobuaki GORAI , Naoki SAITO , Takayuki ISHIKAWA
IPC: G01F1/40
Abstract: In the physical quantity detection device, the occurrence of the measurement error is reduced by suppressing the flow bias in the sub-passage and reducing the resistance in the passage. A physical quantity detection device 30 of the present invention includes a measuring portion 310 disposed in a main passage, a sub-passage 330 that takes a gas to be measured from the main passage, a support member 603 that divides a part of the sub-passage into two flow paths of one surface side and the other surface side in a direction intersecting a passage width direction, and a flow rate detection element 602 disposed on one surface of the support member. The sub-passage includes a straight portion 321 in which the support member is disposed and a downstream curved portion 322 that is curved to one side in the passage width direction of the straight portion. The straight portion is provided with a dividing wall 500 that divides the flow path on the other surface side of the support member into two flow paths on one side and the other side in the passage width direction, and a cross-sectional area of the flow path on one side in the passage width direction is smaller than a cross-sectional area of the flow path on the other side in the passage width direction.
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公开(公告)号：US20220074375A1
公开(公告)日：2022-03-10
申请号：US17414738
申请日：2020-02-07
Applicant: Hitachi Astemo, Ltd.
Inventor： Nobuaki GORAI , Takahiro MIKI , Akira UENODAN , Naoki SAITO
Abstract: To obtain a physical quantity detection device capable of reducing an intake amount of air accompanied by foreign matter. A physical quantity detection device (20) of the invention includes a housing arranged in a main passage through which a measurement target gas (2) flows. The housing is provided with a second sub-passage (B) that takes in a part of the measurement target gas (2) flowing in the main passage, a circuit chamber (135) that accommodates a pressure sensor (320) that detects a pressure of the measurement target gas (2), and a pressure introduction passage (170) having one end opened in the middle of the second sub-passage (B) and the other end opened in the circuit chamber (135) and capable of introducing the pressure of the measurement target gas (2) from the second sub-passage (B) into the circuit chamber (135). In the pressure introduction passage (170), an introduction port (171) is arranged at a position offset outward from a side wall surface (152b) of the second sub-passage (B).
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公开(公告)号：US20220074774A1
公开(公告)日：2022-03-10
申请号：US17422249
申请日：2020-01-23
Applicant: Hitachi Astemo, Ltd.
Inventor： Shigeto HIROHATA , Akira UENODAN , Nobuaki GORAI , Takahiro MIKI , Nozomi YATSUMONJI
Abstract: Provided is a physical quantity detection device capable of achieving both rigidity improvement and sealability improvement. A physical quantity detection device (20) of the invention includes a housing (100), a cover (200), a chip package (310), and a flow rate sensor (311) supported by the chip package and arranged in a sub-passage. The housing includes: a first adhesive groove 160A which is an adhesive groove to which an adhesive for bonding the cover is applied, extends along a proximal end of the housing, extends in the protruding direction of the housing from the proximal end of the housing to a position on a more distal end side of the housing than the chip package, and is applied with the first adhesive 401; and a second adhesive groove 160B which extends along the sub-passage 134 and is applied with the second adhesive 402. The first adhesive has a higher Young's modulus, and the second adhesive has a higher thixotropy.
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Patent Agency Ranking
公开(公告)号：US20230408316A1
公开(公告)日：2023-12-21
申请号：US18034319
申请日：2021-09-08
Applicant: Hitachi Astemo, Ltd.
Inventor： Nobuaki GORAI , Akira UENODAN , Naoki SAITO , Takahiro MIKI
CPC classification number: G01F5/00 , G01F1/6842
Abstract: An object of the present invention is to provide a physical quantity detection device configured to reduce an influence of a resonance phenomenon of sound pressure on flow rate characteristics. The physical quantity detection device according to the present invention includes: a housing arranged in the main passage; a sub-passage arranged in the housing; a flow rate detection unit arranged in the sub-passage; a circuit unit electrically connected to the flow rate detection unit; a circuit chamber arranged in the housing and accommodating the circuit unit; and a first introduction passage including one end open to the sub-passage and the other end open to the circuit chamber to communicate between the sub-passage and the circuit chamber. The flow rate detection unit includes a diaphragm including a diaphragm front surface exposed to the sub-passage and a diaphragm rear surface exposed to a closed chamber that communicates with the circuit chamber, and the circuit chamber includes at least one or more protrusions arranged opposite an opening to which the other end of the first introduction passage is open.
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公开(公告)号：US20250012610A1
公开(公告)日：2025-01-09
申请号：US18711164
申请日：2021-11-30
Applicant: HITACHI ASTEMO, LTD.
Inventor： Nobuaki GORAI , Naoki SAITO , Akira UENODAN , Takahiro MIKI
IPC: G01F1/684
Abstract: A physical quantity detection device (20), which can be disposed in a main flow path (22a) where a measurement target gas (2) flows in one direction, includes: a circuit chamber (135a) that accommodates a circuit board (300); an inflow hole (220) that communicates the main flow path (22a) with the circuit chamber (135a) and allows the measurement target gas (2) flowing through the main flow path (22a) to flow into the circuit chamber (135a); an outflow hole (170) that communicates the main flow path (22a) with the circuit chamber (135a) and allows the measurement target gas (2) in the circuit chamber (135a) to flow out to the main flow path (22a); and a sensor (322) disposed in the circuit chamber (135a) to be at least partially located on a path (2a) of the measurement target gas (2) flowing from the inflow hole (220) to the outflow hole (170).
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公开(公告)号：US20240027245A1
公开(公告)日：2024-01-25
申请号：US18266399
申请日：2021-09-07
Applicant: Hitachi Astemo, Ltd.
Inventor： Yushi ARAKI , Akira UENODAN , Nobuaki GORAI
CPC classification number: G01F1/6842 , F02D41/18
Abstract: A physical quantity detection device for reducing an influence of a sound wave generated in a turbocharger and suppressing a decrease in detection accuracy of a physical quantity including a flow rate of gas. The device detects a physical quantity of air from an intake passage of an engine equipped with a turbocharger. The physical device includes a sub-passage that takes in part of air flowing from an upstream to a downstream side of the intake passage along a first direction, and a flow rate detection unit that detects a flow rate of the air taken in the sub-passage. The sub-passage includes an inlet that opens toward the upstream side in the first direction, an outlet that opens toward the downstream side in the first direction, and an attenuation chamber that attenuates a sound wave propagating from the turbocharger to an inside of the outlet.
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公开(公告)号：US20230251120A1
公开(公告)日：2023-08-10
申请号：US18008027
申请日：2021-01-29
Applicant: Hitachi Astemo, Ltd.
Inventor： Akira UENODAN , Naoki SAITO , Takahiro MIKI , Nobuaki GORAI
Abstract: According to the present invention, it is possible to provide a flow rate measurement device capable of accurately measuring a flow rate of a measurement target gas by improving anti-contamination property. A flow rate measurement device (20) of the present invention includes a board (304) disposed along a flow direction of a measurement target gas (2) in a sub passage (134), a support body (401) that is disposed to face one surface (304a) of the board, and a flow rate sensor (411) that is supported by the support body, faces the one surface of the board, and measures a flow rate of the measurement target gas passing between the support body and the board. The sub passage includes a first passage portion D1 between the support body and one surface of the board, a second passage portion D2 between the other surface of the board and a passage wall surface of the sub passage opposed thereto, and a third passage portion D3 between the support body and the passage wall surface of the sub passage that faces the support body. The support body has a first side surface (407) that faces in the flow direction of the measurement target gas in the sub passage.
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公开(公告)号：US20220397437A1
公开(公告)日：2022-12-15
申请号：US17776658
申请日：2020-10-27
Applicant: Hitachi Astemo, Ltd.
Inventor： Tomoaki SAITO , Akira UENODAN , Nobuaki GORAI
Abstract: Provided is a physical quantity detection device that can improve physical quantity measurement accuracy over a conventional device. A physical quantity detection device 20 includes a detector including a flow rate detection unit 205, a circuit board 207, a housing 201, and a cover 202. The detector detects a physical quantity and is mounted on the circuit board 207. The housing 201 houses the circuit board 207. The cover 202 is fixed to the housing 201 and defines an auxiliary passage 234 in which the flow rate detection unit 205 is disposed. The housing 201 and the cover 202 include a positioning portion P that includes a pin P1 extending in a thickness direction Dt of the circuit board 207 and a fitting portion P2 into which an end portion P11 of the pin P1 is fitted for positioning between the housing 201 and the cover 202. The pin P1 includes an engagement portion P12 that faces an engagement surface 207f of the circuit board 207 along the thickness direction Dt and restricts movement of the circuit board 207 in a surface direction Df along the front and rear surfaces thereof.
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