US 11,028,790 B2Granted

Purge control valve device

AssigneeHamanakodenso Co., Ltd.

InventorsYasunori Kobayashi, Tetsunori Inoguchi, Younan Ri, Ryo Asaka

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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.

Claims18

Dependent claims

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.

9 more elements

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.

9 more elements

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.

10 more elements

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.

10 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/829,003Filed 25 Mar 2020
Priority: JP JP2019-15609528 Aug 2019
Published: US 2021/0062735 A14 Mar 2021
Granted: 8 Jun 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

F02D 41/004
Controlling the purging of the canister as a function of the engine operating conditions: control of the valve or purge actuator, e.g. duty cycle,…
F02D 41/0045
Adding fuel vapours, e.g. drawn from engine fuel reservoir: estimating, calculating or determining the purging rate, amount, flow or concentration
F02M 25/0836
Adding fuel vapours drawn from engine fuel reservoir: arrangement of valves controlling the admission of fuel vapour to an engine, e.g. valve…
F02M 25/089
Adding fuel vapours drawn from engine fuel reservoir: layout of the fuel vapour installation

Family

US 2021/0062735 A1Pre-grant publication · published 4 Mar 2021
US 11,028,790 B2This patent

From the US filing history. Foreign family members aren’t listed.

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