公开(公告)号：US11136943B2

公开(公告)日：2021-10-05

申请号：US16659788

申请日：2019-10-22

Applicant: DENSO CORPORATION

Inventor： Keiichirou Ishihara ,  Tomohiro Itoh ,  Yasuo Kato

IPC: F02M25/08 ,  F02D41/00 ,  B60K15/035 ,  F02D41/22

Abstract: The evaporative fuel processing system includes a fuel tank, a canister, a pump, a pressure detection unit, a temperature detection unit, and a leak diagnosis unit a leak diagnosis unit configured to diagnose leak in the diagnostic object based on a first pressure change which is a change in pressure detected by the pressure detection unit when the temperature in the diagnostic object changes, a second pressure change which is a change in pressure detected by the pressure detection unit when the inside of the diagnostic object is pressurized or depressurized by the pump, a detected temperature by the temperature detection unit, a first preparation information and a second preparation information.

公开(公告)号：US09464600B2

公开(公告)日：2016-10-11

申请号：US14568607

申请日：2014-12-12

Applicant: DENSO CORPORATION

Inventor： Taiki Yasuzaka ,  Yasuo Kato

IPC: F02M25/08 ,  F04C29/00 ,  F04C23/00 ,  G01M3/22 ,  F04C28/06 ,  F04C25/02 ,  F04C28/02 ,  F04C18/34

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：US09303600B2

公开(公告)日：2016-04-05

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：US10234356B2

公开(公告)日：2019-03-19

申请号：US15592671

申请日：2017-05-11

Applicant: DENSO CORPORATION

Inventor： Makoto Kaneko ,  Yasuo Kato

IPC: F02M25/08 ,  G01M3/00 ,  G01M3/26 ,  G01M3/32 ,  G01M9/00 ,  B60K15/035 ,  B60K15/03 ,  F02M37/04

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：US09261055B2

公开(公告)日：2016-02-16

申请号：US14262856

申请日：2014-04-28

Applicant: DENSO CORPORATION

Inventor： Koji Tsumoto ,  Yasuo Kato

IPC: F02M33/02 ,  F02M25/08

CPC classification number: F02M25/0836 ,  F02M25/0854 ,  F02M2025/0845

Abstract: A tank passage communicates a canister housing with a fuel tank. A purge passage communicates the canister housing with an intake air system. An atmospheric air passage communicates the canister housing with an atmosphere. A valve housing accommodating a valve element is located in a recessed portion defined with a first inner wall and a second inner wall. A seal member is located on a radially outside of the valve housing to seal the recessed portion. The first inner wall has a first opening to communicate the canister housing with the recessed portion. The second inner wall has a second opening to communicate the recessed portion with the atmospheric air passage. The first opening or the second opening is defined around a valve seat. The valve element is seated on and lifted from the valve seat to control communication between the canister housing and the atmospheric air passage.

Abstract translation: 油箱通道将罐壳体与燃料箱连通。 净化通道将罐壳体与进气系统连通。 大气空气通道将罐壳体与气氛连通。 容纳阀元件的阀壳体位于限定有第一内壁和第二内壁的凹部中。 密封构件位于阀壳体的径向外侧以密封凹部。 第一内壁具有第一开口以将罐壳体与凹部连通。 第二内壁具有使凹部与大气通道连通的第二开口。 第一开口或第二开口围绕阀座限定。 阀元件位于阀座上并从阀座升起以控制罐壳体和大气通道之间的连通。

公开(公告)号：US10457267B2

公开(公告)日：2019-10-29

申请号：US15838737

申请日：2017-12-12

Applicant: DENSO CORPORATION

Inventor： Hirofumi Onodera ,  Kunio Namba ,  Yasuo Kato

IPC: G01M15/04 ,  B60W10/24 ,  B60K28/10 ,  B60K15/035 ,  F02D41/22 ,  B60K15/05 ,  B60K15/03 ,  F02M25/08

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：US10156208B2

公开(公告)日：2018-12-18

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

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：US12163493B2

公开(公告)日：2024-12-10

申请号：US18191749

申请日：2023-03-28

Applicant: DENSO CORPORATION

Inventor： Keiichirou Ishihara ,  Taiki Yasuzaka ,  Tomohiro Itoh ,  Yasuo Kato

IPC: F02M25/00 ,  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：US20160160809A1

公开(公告)日：2016-06-09

申请号：US14959504

申请日：2015-12-04

Applicant: DENSO CORPORATION

Inventor： Shigeru HASEGAWA ,  Yasuo Kato ,  Tomohiro Itoh ,  Kosei Takagi ,  Ryoyu Kishi

IPC: F02M25/08 ,  F04C29/00 ,  F04C18/344

CPC classification number: F02M25/0818 ,  F02M25/0854 ,  F04C18/3442 ,  F04C18/3448 ,  F04C29/0085 ,  F04C2210/1044 ,  F05C2253/20

Abstract: The vane pump has a pump chamber, in which a first inner plate and a second inner plate are movably accommodated at each of axial ends of a rotor. In a case that an electric motor is arranged at a lower side of the vane pump, the first inner plate is moved in a direction to the second inner plate by a force of gravity, so that the first inner plate is brought into contact with a first axial end of the rotor. As a result, an upper side axial open end of each pumping room, which is respectively defined by multiple vanes, is closed by the first inner plate. An amount of air leaking from one of the pumping rooms to the other pumping rooms can be reduced.

Abstract translation: 叶片泵具有泵室，其中第一内板和第二内板可移动地容纳在转子的每个轴向端部处。 在电动机布置在叶片泵的下侧的情况下，第一内板通过重力沿与第二内板的方向移动，使得第一内板与第一内板接触 转子的第一轴向端。 结果，由多个叶片分别限定的每个泵房的上侧轴向开口端由第一内板封闭。 可以减少从其中一个抽水室泄漏到另一个抽水室的空气量。

公开(公告)号：US20140331976A1

公开(公告)日：2014-11-13

申请号：US14262856

申请日：2014-04-28

Applicant: DENSO CORPORATION

Inventor： Koji Tsumoto ,  Yasuo Kato

IPC: F02M25/08

CPC classification number: F02M25/0836 ,  F02M25/0854 ,  F02M2025/0845

Abstract: A tank passage communicates a canister housing with a fuel tank. A purge passage communicates the canister housing with an intake air system. An atmospheric air passage communicates the canister housing with an atmosphere. A valve housing accommodating a valve element is located in a recessed portion defined with a first inner wall and a second inner wall. A seal member is located on a radially outside of the valve housing to seal the recessed portion. The first inner wall has a first opening to communicate the canister housing with the recessed portion. The second inner wall has a second opening to communicate the recessed portion with the atmospheric air passage. The first opening or the second opening is defined around a valve seat. The valve element is seated on and lifted from the valve seat to control communication between the canister housing and the atmospheric air passage.

Abstract translation: 油箱通道将罐壳体与燃料箱连通。 净化通道将罐壳体与进气系统连通。 大气空气通道将罐壳体与气氛连通。 容纳阀元件的阀壳体位于限定有第一内壁和第二内壁的凹部中。 密封构件位于阀壳体的径向外侧以密封凹部。 第一内壁具有第一开口以将罐壳体与凹部连通。 第二内壁具有使凹部与大气通道连通的第二开口。 第一开口或第二开口围绕阀座限定。 阀元件位于阀座上并从阀座升起以控制罐壳体和大气通道之间的连通。