公开(公告)号：US20210302262A1

公开(公告)日：2021-09-30

申请号：US17215702

申请日：2021-03-29

Applicant: DENSO CORPORATION

Inventor： Ryoyuu KISHI ,  Tomohiro ITOH ,  Yasuo KATOH

IPC: G01M3/26 ,  F02M25/08

Abstract: A pressure sensor for an evaporated fuel leak detector is used for checking a leak in a fuel tank and a canister. The pressure sensor includes a sensor unit, a case, and a sealing resin. The sensor unit includes a pressure receiving portion for detecting a pressure of a fluid applied to a pressure receiving surface, and a mold resin portion covering a surface of the pressure receiving portion except for the pressure receiving surface. The case has a fluid flow path for introducing the fluid to the pressure receiving surface, and a housing recess in which the sensor unit is accommodated. The sealing resin is arranged in the housing recess, to at least cover a back surface of the mold resin portion located on an opposite side of the pressure receiving surface.

公开(公告)号：US20210302265A1

公开(公告)日：2021-09-30

申请号：US17215725

申请日：2021-03-29

Applicant: DENSO CORPORATION

Inventor： Ryoyuu KISHI ,  Yasuo KATOH ,  Tomohiro ITOH

IPC: G01M3/32

Abstract: A pressure sensor for an evaporated fuel leak detector includes a sensor unit, a case, and a sealing resin. The sensor unit has a pressure receiving portion, a plurality of conduction terminals, and a mold resin portion. The case has a fluid flow path and a housing recess. Each remaining inner wall surface of the housing recess except for an inner wall surface on the conduction terminal side is provided with an inclined surface and a vertical surface, in a cross section along an axial direction perpendicular to a pressure receiving surface of the sensor unit. The inclined surface is inclined inward as toward a pressure receiving side. The vertical surface extends from the end of the inclined surface on the pressure receiving side to define a filling gap in which the sealing resin is filled between the side surface of the mold resin portion and the vertical surface.

公开(公告)号：US20210302261A1

公开(公告)日：2021-09-30

申请号：US17215667

申请日：2021-03-29

Applicant: DENSO CORPORATION

Inventor： Ryoyuu KISHI ,  Yasuo KATOH ,  Tomohiro ITOH

IPC: G01M3/26 ,  F02M25/08

Abstract: A pressure sensor for an evaporated fuel leak detector is used for checking a leak in a fuel tank and a canister. The pressure sensor includes a sensor unit, a case, and a sealing resin. The sensor unit has a pressure receiving portion, a plurality of conduction terminals, and a mold resin portion. The case is provided with a fluid flow path and a housing recess. The case has an annular inner wall surface that defines the housing recess and surrounds a side surface of the mold resin portion. The inner wall surface of the case is provided with a stepped surface that is parallel to the pressure receiving surface or is inclined by an internal angle of less than 90° with respect to the pressure receiving surface, in a cross section along a direction perpendicular to the pressure receiving surface.

公开(公告)号：US20180187632A1

公开(公告)日：2018-07-05

申请号：US15738241

申请日：2016-06-16

Applicant: DENSO CORPORATION

Inventor： Ryoyuu KISHI ,  Yasuo KATO ,  Shigeru HASEGAWA ,  Tomohiro ITOH ,  Makoto KANEKO ,  Kosei TAKAGI

IPC: F02M25/08

CPC classification number: F02M25/0809 ,  F02M25/08 ,  F02M25/0818 ,  F02M25/0872 ,  F02M25/089 ,  F02M2025/0845

Abstract: An inspection apparatus includes a pressure sensor, a reference orifice, a pump, and a switching valve. The reference orifice is disposed in a first communication passage communicating a pressure passage receiving the pressure sensor, with a tank passage communicating with a fuel tank. The pump depressurizing or pressurizing the pressure passage includes an intake port and a discharge port, and one of which communicates with an atmospheric passage communicating with the atmosphere and the other one communicates with the pressure passage. The switching valve and switches between a state shutting off a communication of a second communication passage that leads to the pressure passage and passages other than the pressure passage and communicating the atmospheric passage with the tank passage and a state shutting off a communication of the atmospheric passage and passages other than the pump and the atmosphere and communicating the second communication passage with the tank passage.