公开(公告)号：US12018679B2

公开(公告)日：2024-06-25

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 ,  F04C2/344 ,  F04C15/00

CPC classification number: F04C14/08 ,  F04C2/344 ,  F04C15/0049 ,  F04C2230/60 ,  F04C2240/30 ,  F04C2240/40

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：US11603809B2

公开(公告)日：2023-03-14

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.