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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.
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Patent Agency Ranking
公开(公告)号：US20200101835A1
公开(公告)日：2020-04-02
申请号：US16575625
申请日：2019-09-19
Applicant: DENSO CORPORATION
Inventor： Taiki YASUZAKA
Abstract: An evaporated fuel treatment device includes a fuel tank that stores fuel for an internal combustion engine, a canister that adsorbs evaporated fuel generated in the fuel tank, a pump that pressurizes and depressurizes a diagnostic target system including the fuel tank, a pressure detection unit that detects pressure in the diagnostic target system, a fuel state detection unit that detects a state of the fuel in the fuel tank, a leakage diagnosis unit that diagnoses leakages of evaporated fuel from the diagnostic target system, the diagnostic target system based on a change in a detection value detected by the pressure detection unit when the pump pressurizes or depressurizes the diagnostic target system, and a diagnosis determination unit that determines whether the leakage diagnosis unit performs the diagnosis based on a change in a state detection value detected by the fuel state detection unit.
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公开(公告)号：US20190353120A1
公开(公告)日：2019-11-21
申请号：US16385031
申请日：2019-04-16
Applicant: DENSO CORPORATION
Inventor： Taiki YASUZAKA , Tomohiro ITOH
IPC: F02M25/08
Abstract: A leakage detecting device includes a first sensor, a second sensor, a pump, a leakage determination portion and a determination resetting portion. The first sensor, which is provided in a first passage connecting a fuel tank to a canister, detects density of vaporized fuel generated in the fuel tank. The second sensor, which is provided in a third passage connecting the canister to the pump, detects pressure in the third passage. The pump is provided between the third passage and an atmospheric passage. The leakage determination portion determines whether there is leakage in a vaporized fuel processing system or not, based on a time-variable amount of the pressure detected by the second sensor. The determination resetting portion resets a leakage determination result of the leakage determination portion, based on a time-variable amount of the density and the time-variable amount of the pressure.
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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
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。
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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.
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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
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.
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