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.

公开(公告)号：US20170328806A1

公开(公告)日：2017-11-16

申请号：US15592671

申请日：2017-05-11

Applicant: DENSO CORPORATION

Inventor： Makoto KANEKO ,  Yasuo KATO

IPC: G01M3/26 ,  B60K15/035 ,  F02M25/08 ,  F02M37/04 ,  B60K15/03

CPC classification number: G01M3/26 ,  B60K15/03504 ,  B60K2015/0321 ,  B60K2015/03256 ,  B60K2015/03328 ,  B60K2015/03514 ,  F02M25/0818 ,  F02M25/0854 ,  F02M25/089 ,  F02M37/045

Abstract: An evaporation leakage checking system includes a pump, a pump passage unit, a tank passage unit, a specified passage unit, an atmosphere passage unit, a flow-passage area changing unit, an atmosphere valve unit, a pressure sensing unit, and a control unit. The control unit includes a calculating unit that calculates a leakage threshold, based on a first pressure, a first area, an Nth pressure, an Nth area, and a reference area that is predetermined, and a leakage checking unit that activates the pump, closes the atmosphere passage unit by changing the flow-passage area of the atmosphere passage unit by using the atmosphere valve unit, and checks the existence of the evaporation leakage based on the leakage threshold and a checking pressure that is the pressure sensed by the pressure sensor in a case where a communication between the tank passage unit and the pump passage unit is allowed.

公开(公告)号：US20140102421A1

公开(公告)日：2014-04-17

申请号：US14050411

申请日：2013-10-10

Applicant: DENSO CORPORATION

Inventor： Yasuo KATO

IPC: F02M25/08

CPC classification number: F02M25/0854 ,  F02M25/0818

Abstract: A fuel vapor leakage detection device performs a fuel vapor leakage detection method to detect a clogging of passages in an evaporated fuel processing system by (i) switching a switching valve after measuring a first reference pressure, (ii) determining whether a detected pressure equals atmospheric pressure after opening a purge valve, (iii) recording the detected pressure after closing the purge valve, and (iv) switching the switching valve to depressurize an atmospheric system and to determine whether a current detection value of the pressure sensor is the same as the first reference pressure. Then, a second reference pressure is measured for comparison with the first reference pressure, to determine whether the evaporation system is clogged. In such manner, leakage and the clogging of the passages in an evaporated fuel processing system may be detected.

Abstract translation: 燃料蒸汽泄漏检测装置执行燃料蒸汽泄漏检测方法，以通过（i）在测量第一参考压力之后切换切换阀来检测蒸发燃料处理系统中的通道的堵塞，（ii）确定检测到的压力是否等于大气压 打开净化阀后的压力，（iii）在关闭净化阀之后记录检测到的压力，以及（iv）切换开关阀以减压大气系统，并确定压力传感器的当前检测值是否与 第一参考压力。 然后，测量第二参考压力以与第一参考压力进行比较，以确定蒸发系统是否堵塞。 以这种方式，可以检测蒸发的燃料处理系统中的通道的泄漏和堵塞。

公开(公告)号：US20220145883A1

公开(公告)日：2022-05-12

申请号：US17586093

申请日：2022-01-27

Applicant: DENSO CORPORATION

Inventor： Keiichirou ISHIHARA ,  Tomohiro ITOH ,  Yasuo KATO ,  Masahiro SATOU

IPC: F04C14/08 ,  F04C14/22

Abstract: A vane pump includes a casing, a rotor, vanes, a motor, and a fixed member. The casing defines a pump chamber therein. The rotor is disposed in the casing and configured to eccentrically rotate relative to the casing. The vanes are configured to rotate together with the rotor to slidably move on an inner surface of the casing. The motor is configured to rotate the rotor. Both the motor and the casing are fixed to the fixed member. The casing has an outer side wall surface and a flange. The flange protrudes outward from the outer side wall surface at an intermediate position between both ends of the pump chamber in a rotational axis direction of the rotor. The flange is fixed to the fixed member at a plurality of positions. The fixed member has a linear expansion coefficient that is different from that of the casing.

公开(公告)号：US20180170343A1

公开(公告)日：2018-06-21

申请号：US15838737

申请日：2017-12-12

Applicant: DENSO CORPORATION

Inventor： Hirofumi ONODERA ,  Kunio NAMBA ,  Yasuo KATO

IPC: B60W10/24 ,  B60K28/10

CPC classification number: B60W10/24 ,  B60K15/035 ,  B60K28/10 ,  B60K2015/03026 ,  B60K2015/0321 ,  B60K2015/03585 ,  B60K2015/0546 ,  F02D2041/225 ,  F02M25/0809 ,  F02M25/0836 ,  F02M25/089 ,  F02M2025/0845

Abstract: A controller controls a valve device for opening and closing of a passage to control a flow of evaporative fuel evaporating and flowing from a fuel tank. The valve device includes a valve body housed in the passage to open and close the passage, a biasing member biasing the valve body to close the passage, and a driver driving the valve body to open the fuel passage. The controller includes a detector detecting load of the driver and a determiner to determine the position of the valve body. The determiner determines that the passage is open when a magnitude of the change of the driver load is equal to or greater than a threshold value. The controller accurately detects an open valve position without detecting an internal pressure change of the fuel tank.

公开(公告)号：US20150167598A1

公开(公告)日：2015-06-18

申请号：US14568607

申请日：2014-12-12

Applicant: DENSO CORPORATION

Inventor： Taiki YASUZAKA ,  Yasuo KATO

IPC: F02M25/08 ,  G01M3/22 ,  F04C18/02 ,  F04C29/00 ,  F04C23/00

CPC classification number: F02M25/0818 ,  F02M25/089 ,  F04C18/34 ,  F04C23/003 ,  F04C25/02 ,  F04C28/02 ,  F04C28/065 ,  F04C29/0071 ,  F04C2270/03 ,  G01M3/226

Abstract: A pump casing has two external communication holes communicating with an outside. A partition member partitioning an interior of the pump casing into a first space and a second space. The first space communicates with the two external communication holes. The partition member have two internal communication holes communicating the first space with the second space. A first rotor member is rotatably accommodated in the first space. A second rotor member is rotatably accommodated in the second space. A torque switching unit is configured to switch between transmission of a running torque selectively to the first rotor member and transmission of the running torque to both the first rotor member and the second rotor member.

Abstract translation: 泵壳体具有与外部连通的两个外部连通孔。 分隔构件将泵壳体的内部分隔成第一空间和第二空间。 第一空间与两个外部通信孔连通。 分隔构件具有将第一空间与第二空间连通的两个内部连通孔。 第一转子构件可旋转地容纳在第一空间中。 第二转子构件可旋转地容纳在第二空间中。 扭矩切换单元被配置为在与第一转子构件之间选择性地运行运行转矩的传动和向第一转子构件和第二转子构件向第二转子构件传递运行转矩。

公开(公告)号：US20250059938A1

公开(公告)日：2025-02-20

申请号：US18937137

申请日：2024-11-05

Applicant: DENSO CORPORATION

Inventor： Keiichirou ISHIHARA ,  Taiki YASUZAKA ,  Tomohiro ITOH ,  Yasuo KATO

IPC: F02M25/08

Abstract: A leakage diagnosis device for an evaporative fuel treatment device includes a first vent valve, a second vent valve, and a pump. The first vent valve is configured to block a first atmospheric passage, which is a main passage of an atmospheric passage and connects a canister with an atmospheric opening. The second vent valve is configured to block a second atmospheric passage, which is a bypass passage of the first atmospheric passage and connects the canister with the atmospheric opening. The pump is provided on a side of the atmospheric opening relative to the second vent valve in the second atmospheric passage, and is configured to pressurize or depressurize the second atmospheric passage. A malfunction diagnosis device performs a malfunction diagnosis based on an output value of a pressure sensor, a current value of the pump, or an output value of an air-fuel ratio sensor.

公开(公告)号：US20240288086A1

公开(公告)日：2024-08-29

申请号：US18658010

申请日：2024-05-08

Applicant: DENSO CORPORATION

Inventor： Atsushi TANAKA ,  Yasuo KATO ,  Ryo SANO

IPC: F16K27/04 ,  F16K3/08

CPC classification number: F16K27/04 ,  F16K3/08

Abstract: A boss is shaped in a tubular form and is injection molded integrally with a housing that forms a flow passage. A ring member is press-fitted to an inner peripheral wall of the boss. A shaft placed on a radially inner side of the ring member is configured to be rotated about a central axis. A movable valve is coupled to a portion of the shaft and is configured to adjust a size of a cross-sectional area of a passage opening at the flow passage. Each of gate marks of the housing is a trace of a site of the housing where molten resin is injected at a time of injection molding of the housing. Each of ribs radially inwardly projects from the inner peripheral wall of the boss and is placed at a corresponding location of the boss which is between adjacent two of the gate marks.

公开(公告)号：US20230243320A1

公开(公告)日：2023-08-03

申请号：US18191749

申请日：2023-03-28

Applicant: DENSO CORPORATION

Inventor： Keiichirou ISHIHARA ,  Taiki YASUZAKA ,  Tomohiro ITOH ,  Yasuo KATO

IPC: F02M25/08

CPC classification number: F02M25/0818 ,  F02M25/0836

Abstract: A leakage diagnosis device for an evaporative fuel treatment device includes a first vent valve, a second vent valve, and a pump. The first vent valve is configured to block a first atmospheric passage, which is a main passage of an atmospheric passage and connects a canister with an atmospheric opening. The second vent valve is configured to block a second atmospheric passage, which is a bypass passage of the first atmospheric passage and connects the canister with the atmospheric opening. The pump is provided on a side of the atmospheric opening relative to the second vent valve in the second atmospheric passage, and is configured to pressurize or depressurize the second atmospheric passage. A malfunction diagnosis device performs a malfunction diagnosis based on an output value of a pressure sensor, a current value of the pump, or an output value of an air-fuel ratio sensor.

公开(公告)号：US20220099051A1

公开(公告)日：2022-03-31

申请号：US17486694

申请日：2021-09-27

Applicant: DENSO CORPORATION

Inventor： Keiichirou ISHIHARA ,  Taiki YASUZAKA ,  Yasuo KATO

IPC: F02M25/08 ,  F02D41/00 ,  F02D41/22

Abstract: A leakage diagnostic device diagnoses leakage of evaporated fuel in an evaporative fuel treatment device. The evaporative fuel treatment device purges evaporated fuel, which is generated in a fuel tank and adsorbed on a canister, to an intake passage. The leakage diagnostic device includes a vent valve that blocks a first atmospheric passage, which connects the canister with an atmospheric opening, and a pump that pressurizes and depressurizes a second atmospheric passage, which is a bypass passage of the first atmospheric passage. The malfunction diagnostic device diagnoses malfunction of the leakage diagnostic device based on an output value of a pressure sensor that detects pressure in a passage connected to the canister.