# US 11,028,790 B2 · Purge control valve device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,028,790 B2 - Document ID: US11028790B2 - Status: Granted - Kind: B2 - Application number: 16/829,003 - Filed: 2020-03-25 - Published: 2021-03-04 - Granted: 2021-06-08 - Earliest claimed: 2019-08-28 - Assignees: Hamanakodenso Co., Ltd. - Applicants: Hamanakodenso Co., Ltd. - Inventors: Yasunori Kobayashi; Tetsunori Inoguchi; Younan Ri; Ryo Asaka - Web page: https://patentgrep.com/patent/US11028790B2 ## CPC - F02D 41/004: {Control of the valve or purge actuator, e.g. duty cycle, closed loop control of position} - F02D 41/0045: {Estimating, calculating or determining the purging rate, amount, flow or concentration} - F02M 25/0836: {Arrangement of valves controlling the admission of fuel vapour to an engine, e.g. valve being disposed between fuel tank or absorption canister and intake manifold} - F02M 25/089: {Layout of the fuel vapour installation} - F02M 2025/0845: {Electromagnetic valves} - F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W) - F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF ## Abstract In a purge control valve device, a purge valve includes a first electromagnetic valve and a second electromagnetic valve which are provided inside a housing. The first electromagnetic valve has a first valve body that controls a flow rate of evaporative fuel flowing in the housing. The second electromagnetic valve has a second valve body that controls a flow rate of evaporative fuel flowing in the housing. The upstream passage and the downstream passage are arranged in series. The first electromagnetic valve switches a seated state and an unseated state of the first valve body. The purge valve has a narrowed passage in which a flow rate of the evaporative fuel is smaller in one of the seated state and the unseated state than in another of the seated state and the unseated state. ## Claims ### Claim 1 A purge control valve device comprising: an inflow port into which the evaporative fuel flowing out of a canister flows; an outlet port through which the evaporative fuel flows out toward an engine; a housing having an in-housing passage connecting the inflow port and the outflow port; a first electromagnetic valve provided inside the housing and having a first valve body opening and closing a first internal passage included in the in-housing passage to control a flow rate of the evaporative fuel; and a second electromagnetic valve provided inside the housing and having a second valve body opening and closing a second internal passage included in the in-housing passage to control a flow rate of the evaporative fuel, wherein the first internal passage and the second internal passage are arranged in series in the in-housing passage, the first electromagnetic valve and the second electromagnetic valve are controlled to operate individually, and the first electromagnetic valve is switched between a seated state in which the first valve body contacts a first valve seat and an unseated state in which the first valve body is separated from the first valve seat, the purge control valve device further comprising a narrowed passage in which a flow rate of the evaporative fuel is smaller in one of the seated state and the unseated state than in another of the seated state and the unseated state, and a valve regulator that moves together with the first valve body in response to an electromagnetic force and regulates a displaceable range of the second valve body, wherein the valve regulator brings the second valve body closer to a second valve seat in the one state than in the other state. ### Claim 2 (depends on 1) The purge control valve device according to claim 1, wherein the first internal passage is disposed upstream of the second internal passage. ### Claim 3 (depends on 1) The purge control valve device according to claim 1, wherein the first electromagnetic valve includes a first passage that functions as the narrowed passage in the unseated state, and a second passage which is larger in passage cross-sectional area than the narrowed passage and through which the evaporative fuel flows in the seated state. ### Claim 4 (depends on 1) The purge control valve device according to claim 1, wherein the first electromagnetic valve includes a first passage that becomes the narrowed passage in the seated state, and a second passage which is larger in passage cross-sectional area than the narrowed passage and through which the evaporative fuel flows in the unseated state. ### Claim 5 A purge control valve device comprising: an inflow port into which the evaporative fuel flowing out of a canister flows; an outlet port through which the evaporative fuel flows out toward an engine; a housing having an in-housing passage connecting the inflow port and the outflow port; a first electromagnetic valve provided inside the housing and having a first valve body opening and closing a first internal passage included in the in-housing passage to control a flow rate of the evaporative fuel; and a second electromagnetic valve provided inside the housing and having a second valve body opening and closing a second internal passage included in the in-housing passage to control a flow rate of the evaporative fuel, wherein the first internal passage and the second internal passage are arranged in series in the in-housing passage, the first electromagnetic valve and the second electromagnetic valve are controlled to operate individually, and the first electromagnetic valve is switched between a seated state in which the first valve body contacts a first valve seat and an unseated state in which the first valve body is separated from the first valve seat, the purge control valve device further comprising a narrowed passage in the first internal passage such that a passage cross-sectional area of the first internal passage is smaller in one of the seated state and the unseated state than in another of the seated state and the unseated state, and a valve regulator that moves together with the first valve body in response to an electromagnetic force and regulates a displaceable range of the second valve body, wherein the valve regulator brings the second valve body closer to a second valve seat in the one state than in the other state. ### Claim 6 (depends on 5) The purge control valve device according to claim 5, wherein the first internal passage is disposed upstream of the second internal passage. ### Claim 7 (depends on 5) The purge control valve device according to claim 5, wherein the first electromagnetic valve includes a first passage that functions as the narrowed passage in the unseated state, and a second passage which is larger in passage cross-sectional area than the narrowed passage and through which the evaporative fuel flows in the seated state. ### Claim 8 (depends on 5) The purge control valve device according to claim 5, wherein the first electromagnetic valve includes a first passage that becomes the narrowed passage in the seated state, and a second passage which is larger in passage cross-sectional area than the narrowed passage and through which the evaporative fuel flows in the unseated state. ### Claim 9 A purge control valve device comprising: an inflow port into which the evaporative fuel flowing out of a canister flows; an outlet port through which the evaporative fuel flows out toward an engine; a housing having an in-housing passage connecting the inflow port and the outflow port; a first electromagnetic valve provided inside the housing and having a first valve body opening and closing a first internal passage included in the in-housing passage to control a flow rate of the evaporative fuel; and a second electromagnetic valve provided inside the housing and having a second valve body opening and closing a second internal passage included in the in-housing passage to control a flow rate of the evaporative fuel, wherein the first internal passage and the second internal passage are arranged in series in the in-housing passage, the first electromagnetic valve and the second electromagnetic valve are controlled to operate individually, and the first electromagnetic valve is switched between a seated state in which the first valve body contacts a first valve seat and an unseated state in which the first valve body is separated from the first valve seat, the purge control valve device further comprising a narrowed passage in which a flow rate of the evaporative fuel is smaller in one of the seated state and the unseated state than in another of the seated state and the unseated state, and a controller that individually controls the first electromagnetic valve and the second electromagnetic valve when increasing the flow rate of the evaporative fuel such that the controller separately performs a mode of a first increase rate and a mode of a second increase rate that is larger in flow increase rate than the mode of the first increase rate, wherein the controller controls the first electromagnetic valve and the second electromagnetic valve during the mode of the first increase rate such that the evaporative fuel flows through the narrowed passage, and the controller controls the first electromagnetic valve and the second electromagnetic valve during the mode of the second increase rate such that the evaporative fuel flows through an open passage larger in passage cross-sectional area than the narrowed passage. ### Claim 10 (depends on 9) The purge control valve device according to claim 9, wherein the controller executes the mode of the first increase rate and then executes the mode of the second increase rate in a flow-rate increase control in which the flow rate of the evaporative fuel flowing out of the outflow port is increased from zero. ### Claim 11 (depends on 9) The purge control valve device according to claim 9, wherein the controller controls the first electromagnetic valve by turning on and off energization of the first electromagnetic valve, and controls the second electromagnetic valve by controlling a duty cycle of voltage applied to the second electromagnetic valve, and the controller is configured to, in the control of the second electromagnetic valve, increase the duty cycle of the applied voltage in the mode of the first increase rate, reduce the duty cycle of the applied voltage at a time of shifting from the mode of the first increase rate to the mode of the second increase rate, and increase the duty cycle of the applied voltage in the mode of the second increase rate. ### Claim 12 (depends on 9) The purge control valve device according to claim 9, wherein the controller individually controls the first electromagnetic valve and the second electromagnetic valve and performs the mode of the first increase rate when learning a concentration of the evaporative fuel. ### Claim 13 (depends on 9) The purge control valve device according to claim 9, wherein the controller individually controls the first electromagnetic valve and the second electromagnetic valve so as to perform the mode of the first increase rate when a condition for generation of noise is met. ### Claim 14 A purge control valve device comprising: an inflow port into which the evaporative fuel flowing out of a canister flows; an outlet port through which the evaporative fuel flows out toward an engine; a housing having an in-housing passage connecting the inflow port and the outflow port; a first electromagnetic valve provided inside the housing and having a first valve body opening and closing a first internal passage included in the in-housing passage to control a flow rate of the evaporative fuel; and a second electromagnetic valve provided inside the housing and having a second valve body opening and closing a second internal passage included in the in-housing passage to control a flow rate of the evaporative fuel, wherein the first internal passage and the second internal passage are arranged in series in the in-housing passage, the first electromagnetic valve and the second electromagnetic valve are controlled to operate individually, and the first electromagnetic valve is switched between a seated state in which the first valve body contacts a first valve seat and an unseated state in which the first valve body is separated from the first valve seat, the purge control valve device further comprising a narrowed passage in the first internal passage such that a passage cross-sectional area of the first internal passage is smaller in one of the seated state and the unseated state than in another of the seated state and the unseated state, and a controller that individually controls the first electromagnetic valve and the second electromagnetic valve when increasing the flow rate of the evaporative fuel such that the controller separately performs a mode of a first increase rate and a mode of a second increase rate that is larger in flow increase rate than the mode of the first increase rate, wherein the controller controls the first electromagnetic valve and the second electromagnetic valve during the mode of the first increase rate such that the evaporative fuel flows through the narrowed passage, and the controller controls the first electromagnetic valve and the second electromagnetic valve during the mode of the second increase rate such that the evaporative fuel flows through an open passage larger in passage cross-sectional area than the narrowed passage. ### Claim 15 (depends on 14) The purge control valve device according to claim 14, wherein the controller executes the mode of the first increase rate and then executes the mode of the second increase rate in a flow-rate increase control in which the flow rate of the evaporative fuel flowing out of the outflow port is increased from zero. ### Claim 16 (depends on 14) The purge control valve device according to claim 14, wherein the controller controls the first electromagnetic valve by turning on and off energization of the first electromagnetic valve, and controls the second electromagnetic valve by controlling a duty cycle of voltage applied to the second electromagnetic valve, and the controller is configured to, in the control of the second electromagnetic valve, increase the duty cycle of the applied voltage in the mode of the first increase rate, reduce the duty cycle of the applied voltage at a time of shifting from the mode of the first increase rate to the mode of the second increase rate, and increase the duty cycle of the applied voltage in the mode of the second increase rate. ### Claim 17 (depends on 14) The purge control valve device according to claim 14, wherein the controller individually controls the first electromagnetic valve and the second electromagnetic valve and performs the mode of the first increase rate when learning a concentration of the evaporative fuel. ### Claim 18 (depends on 14) The purge control valve device according to claim 14, wherein the controller individually controls the first electromagnetic valve and the second electromagnetic valve so as to perform the mode of the first increase rate when a condition for generation of noise is met.