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公开(公告)号：US10221811B2
公开(公告)日：2019-03-05
申请号：US15704410
申请日：2017-09-14
Applicant: DENSO CORPORATION
Inventor： Ryoyu Kishi , Tomohiro Itoh
Abstract: A pressure sensor is provided in a purge pipe connecting a fuel tank to a canister, so that the pressure sensor outputs an electrical signal of a first sensor value depending on an inside pressure of the canister. A control unit calculates an estimated sealed pressure, which corresponds to the inside pressure of the canister in a condition that the canister and the fuel tank are in a sealed condition. The control unit determines that there is no leakage of fuel vapor, when the first sensor value is out of a first pressure range. The control unit determines that there is a small leakage of the fuel vapor, when the first sensor value is within the first pressure range but out of a second pressure range, wherein the second pressure range is smaller than the first pressure range. The control unit determines that there is a large leakage or a blocked-up condition in the purge pipe when the first sensor value is within the second pressure range.
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公开(公告)号：US20140158229A1
公开(公告)日：2014-06-12
申请号：US14031604
申请日：2013-09-19
Applicant: DENSO CORPORATION
Inventor： Ryoyu Kishi , Shinji Sugihara
CPC classification number: F16K17/04 , F16K1/443 , F16K15/025 , F16K17/025 , F16K17/0466 , Y10T137/7922
Abstract: A first seal portion forms, when seated on a first seated position, a valve side chamber blocked from a relief chamber to have an equivalent fluid pressure to fluid pressure in a pressure-controlled chamber. The first seal portion causes, when lifted from the first seated position on increase in fluid pressure in the pressure-controlled chamber, the valve side chamber to disappear and to communicate the relief chamber with the pressure-controlled chamber. A second seal portion partitions, when seated on a second seated position, a part of the valve side chamber from the other part of the valve side chamber. The second seal portion is configured to be lifted from the second seated position on increase in fluid pressure in the pressure-controlled chamber, before the first seal portion is lifted from the first seated position.
Abstract translation: 第一密封部分在第一就座位置时形成阀侧室，其从泄压室封闭以在压力控制室中具有与流体压力相当的流体压力。 当第一密封部分在压力控制室中的流体压力增加时从第一就座位置升起时，阀侧室消失并将排放室与压力控制室连通。 当第二密封部分位于第二安置位置时，阀侧室的一部分与阀侧室的另一部分隔开。 第二密封部分构造成在第一密封部分从第一就座位置提升之前，在压力控制室中的流体压力增加时从第二就座位置升起。
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公开(公告)号：US11430271B2
公开(公告)日：2022-08-30
申请号：US16562753
申请日：2019-09-06
Applicant: DENSO CORPORATION
Inventor： Ryoyu Kishi
Abstract: A fuel vapor treatment apparatus is provided with a fuel tank for storing fuel of an internal combustion engine, a canister for adsorbing fuel vapor generated in the fuel tank, a pump for reducing a pressure inside a detection target system including the fuel tank, a pressure detection sensor for detecting the pressure inside the detection target system, and a fluctuation detection unit for detecting a fluctuation width of the pressure inside the detection target system at the time when the pressure inside the detection target system is reduced to a predetermined pressure value.
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公开(公告)号：US10801917B2
公开(公告)日：2020-10-13
申请号：US16037329
申请日：2018-07-17
Applicant: DENSO CORPORATION
Inventor： Keiichirou Ishihara , Yuichiro Miura , Ryoyu Kishi , Tomohiro Itoh
IPC: G01M3/28 , G01M3/32 , B60K15/035 , F02M25/08 , G01M3/02
Abstract: A fuel vapor processing device includes a canister, a first purge pipe that forms a first purge path that communicatively connects the inside of the canister and the inside of a fuel tank, a pressure pipe that forms a pressure detection path configured to communicatively connect a first switching valve and a pump, the first switching valve, a sealing valve disposed in the first purge pipe and configured to isolate the inside of the canister from the inside of the fuel tank, a differential pressure sensor, and an ECU. The differential pressure sensor is capable of detecting a difference between a pressure of the first purge path and a pressure of the pressure detection path. The ECU determines presence or absence of a fuel vapor leak while controlling the first switching valve, the pump, and the sealing valve based on a signal output from the differential pressure sensor.
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公开(公告)号：US09638145B2
公开(公告)日：2017-05-02
申请号：US14640143
申请日：2015-03-06
Applicant: DENSO CORPORATION
Inventor： Tomohiro Itoh , Shigeru Hasegawa , Kosei Takagi , Ryoyu Kishi
IPC: F02M25/08
CPC classification number: F02M25/089 , F02M25/0809 , F02M25/0818 , F02M25/0872
Abstract: A housing receiving a switching valve, a pressure sensor, and a pump includes a tubular portion having an inner wall provided with a support portion into which an attachment portion is inserted. The pump includes a pump portion and a motor portion which are connected to the attachment portion. The support portion receives an elastic member abutting on the attachment portion. The elastic member prevents a vibration generated due to an operation of the pump from being transmitted to the tubular portion. Since the pump is supported by a cover through a pressure detection pipe including a pressure detection passage and is supported by the tubular portion through the elastic member and the support portion, the pump prevents from vibrating by its weight. Therefore, a noise radiated out of the housing due to the vibration transmitted from the pump to the housing can be reduced.
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Patent Agency Ranking
公开(公告)号：US09416756B2
公开(公告)日：2016-08-16
申请号：US14340945
申请日：2014-07-25
Applicant: DENSO CORPORATION
Inventor： Ryoyu Kishi
CPC classification number: F02M25/0836 , B60K15/03519 , B60K2015/03296 , B60K2015/03447 , B60K2015/03566 , B60K2015/03585 , F02M25/089 , F02M2025/0845 , F16K1/526 , F16K31/0655 , F16K31/0693 , G05D7/0133 , Y10T137/7922
Abstract: A valve element in a valve chamber is movable between an OFF position and an ON position to switch a flow quantity of fluid between a large flow quantity and a small flow quantity. The valve chamber has a fluid passage including an outer passage defined between an inner periphery of the valve chamber and an outer periphery of the valve element. The valve chamber has a throttle shape to decrease in inner diameter gradually from upstream toward downstream to decrease a minimum passage area of the fluid passage in a non-linear form. The valve chamber increases a differential pressure across the valve element in a linear form relative to a stroke of the valve element when the valve element moves from the OFF position toward the ON position.
Abstract translation: 阀室中的阀元件可在OFF位置和ON位置之间移动，以在大流量和小流量之间切换流体流量。 阀室具有流体通道，其包括限定在阀室的内周和阀元件的外周之间的外通道。 阀室具有从上游向下游逐渐减小的节流阀形状，以非线性形式减小流体通道的最小通道面积。 当阀元件从关闭位置移动到接通位置时，阀室相对于阀元件的冲程以线性形式增加跨越阀元件的压差。
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公开(公告)号：US09150099B2
公开(公告)日：2015-10-06
申请号：US13912459
申请日：2013-06-07
Applicant: DENSO CORPORATION
Inventor： Ryoyu Kishi , Shinji Sugihara
IPC: F16K17/26 , B60K15/035 , F16K17/196 , F16K24/00 , F16K31/06
CPC classification number: B60K15/03519 , F02M25/0836 , F02M2025/0845 , F16K17/196 , F16K24/00 , F16K31/0693 , F16K31/0696 , Y10T137/7837
Abstract: In a relief valve device, a positive-pressure relief valve opens a first valve port when pressure in a pressure chamber increases to a pressure that is equal to or higher than positive-pressure side valve-opening pressure. A negative-pressure relief valve opens a second valve port when pressure in the pressure chamber decreases to a pressure that is equal to or lower than negative-pressure side valve-opening pressure. When the positive-pressure relief valve is closed, a positive valve-opening pressure adjustment unit adjusts a set load of a positive-pressure spring according to an amount of an adjustment screw screwed in the pedestal plate. When the negative-pressure relief valve is closed, a negative valve-opening pressure adjustment unit adjusts a set load of the negative-pressure spring via the valve plate through forward or backward movement of the pedestal plate relative to a housing main body.
Abstract translation: 在安全阀装置中，当压力室内的压力升高至正压侧开阀压力以上的压力时，正压释放阀打开第一阀口。 当压力室中的压力降低到等于或低于负压侧开启压力的压力时，负压释放阀打开第二阀口。 当正压安全阀关闭时，正开阀压力调节单元根据螺纹连接在基座板中的调节螺丝的量来调节正压弹簧的设定载荷。 当负压释放阀关闭时，负开阀压力调节单元通过基座板相对于壳体主体的向前或向后运动经由阀板来调节负压弹簧的设定负载。
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公开(公告)号：US20150059711A1
公开(公告)日：2015-03-05
申请号：US14340945
申请日：2014-07-25
Applicant: DENSO CORPORATION
Inventor： Ryoyu Kishi
CPC classification number: F02M25/0836 , B60K15/03519 , B60K2015/03296 , B60K2015/03447 , B60K2015/03566 , B60K2015/03585 , F02M25/089 , F02M2025/0845 , F16K1/526 , F16K31/0655 , F16K31/0693 , G05D7/0133 , Y10T137/7922
Abstract: A valve element in a valve chamber is movable between an OFF position and an ON position to switch a flow quantity of fluid between a large flow quantity and a small flow quantity. The valve chamber has a fluid passage including an outer passage defined between an inner periphery of the valve chamber and an outer periphery of the valve element. The valve chamber has a throttle shape to decrease in inner diameter gradually from upstream toward downstream to decrease a minimum passage area of the fluid passage in a non-linear form. The valve chamber increases a differential pressure across the valve element in a linear form relative to a stroke of the valve element when the valve element moves from the OFF position toward the ON position.
Abstract translation: 阀室中的阀元件可在OFF位置和ON位置之间移动，以在大流量和小流量之间切换流体流量。 阀室具有流体通道，其包括限定在阀室的内周和阀元件的外周之间的外通道。 阀室具有从上游向下游逐渐减小的节流阀形状，以非线性形式减小流体通道的最小通道面积。 当阀元件从关闭位置移动到接通位置时，阀室相对于阀元件的冲程以线性形式增加跨越阀元件的压差。
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公开(公告)号：US20150027571A1
公开(公告)日：2015-01-29
申请号：US14299403
申请日：2014-06-09
Applicant: DENSO CORPORATION
Inventor： Ryoyu Kishi , Yuichiro Miura , Hirofumi Onodera
CPC classification number: F16K31/02 , B60K15/03519 , B60K2015/03302 , F02M25/0836 , F02M2025/0845 , F16K15/18 , F16K17/30 , F16K27/029 , F16K31/0655 , G05D16/103 , G05D16/2086 , Y10T137/88054
Abstract: A first hole is connected through a first fluid chamber to an inflow hole. A first valve seat is formed around the first hole. A second fluid chamber is connected through a second hole to the first hole. An outflow hole is connected to the second fluid chamber. A second valve seat is formed around the second hole. A third valve seat is formed around the outflow hole. A first valve element is movable in the first fluid chamber to make contact with the first valve seat. A second valve element is movable in the second fluid chamber to make contact with the second valve seat or the third valve seat. A biasing member biases the second valve element toward the second valve seat. An outer peripheral passage is formed between an outer periphery of the second valve element and the second housing to enable flow therethrough.
Abstract translation: 第一孔通过第一流体室连接到流入孔。 第一阀座围绕第一孔形成。 第二流体室通过第二孔连接到第一孔。 流出孔连接到第二流体室。 第二阀座围绕第二孔形成。 第三阀座围绕流出孔形成。 第一阀元件可在第一流体室中移动以与第一阀座接触。 第二阀元件可在第二流体室中移动以与第二阀座或第三阀座接触。 偏置构件朝向第二阀座偏压第二阀元件。 在第二阀体的外周和第二壳体之间形成有外周通路，以使其能够流过。
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公开(公告)号：US10422303B2
公开(公告)日：2019-09-24
申请号：US14852165
申请日：2015-09-11
Applicant: DENSO CORPORATION
Inventor： Ryoyu Kishi , Shigeru Hasegawa , Tomohiro Itoh , Kosei Takagi
IPC: F04C29/12 , F02M25/08 , F04C18/344
Abstract: A first plate portion covers one opening of a pump chamber of a tubular portion, and a second plate portion covers the other opening of the pump chamber along a center axis of the tubular portion. A hole forming portion is equipped to an outside of the tubular portion to form a connection hole. A length of the hole forming portion along the center axis is less than or equal to a length of the tubular portion along the center axis. A first imaginary line connects a center of an outer opening of the connection hole with a point on the center axis. The first imaginary line intersects perpendicularly with the center axis. A length of the connection hole in a direction perpendicular to both the first imaginary line and the center axis is greater than a length of the connection hole along the center axis.
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