CONTROL VALVE ASSEMBLY

• US 20190331063A1
• Filed: 04/22/2019
• Published: 10/31/2019
• Est. Priority Date: 04/26/2018
• Status: Active Grant

• Current Assignee: Hamanako Denso Company Limited (DENSO Corporation)
• Original Assignee: Hamanako Denso Company Limited (DENSO Corporation)
• Inventors: SHIRAI, Kousuke, KAWAMURA, Yuichiro
• Granted Patent: US 11,060,485 B2
• Time in Patent Office: Days
• CPC Class Codes: F02M 2025/0845 Electromagnetic valves
• CPC Class Codes: 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
• CPC Class Codes: F02M 25/089 Layout of the fuel vapour installation

Abstract

A control valve assembly includes a housing accommodating an electromagnetic coil unit which is disposed in an in-housing passage and drives a valve element to open and close the in-housing passage. An inflow-outflow member is coupled to the housing, and includes an inflow portion having an inflow passage through which evaporative fuel flows toward the in-housing passage, and an outflow portion having an outflow passage through which the evaporative fuel from the in-housing passage flows. The outflow passage in the outflow portion and the inflow passage in the inflow portion communicate with each other through the in-housing passage.

Claims

1. A control valve assembly disposed in an evaporative fuel passage through which evaporative fuel desorbed from a canister flows toward an engine, the control valve assembly comprising:

a housing accommodating an electromagnetic coil unit which is disposed in an in-housing passage and drives a valve element to open and close the in-housing passage; and

an inflow-outflow member coupled to the housing, the inflow-outflow member including an inflow portion having an inflow passage through which the evaporative fuel flows toward the in-housing passage, and an outflow portion having an outflow passage through which the evaporative fuel from the in-housing passage flows, wherein

the outflow passage in the outflow portion and the inflow passage in the inflow portion communicate with each other through the in-housing passage.

2. The control valve assembly according to claim 1, further comprising an intermediate member including:

a valve seat for seating of the valve element;

a first passage communicating with the inflow passage, and;

a second passage communicating with the outflow passage, wherein

the intermediate member is interposed between and joined to the housing and the inflow-outflow member.

3. The control valve assembly according to claim 2, wherein

the inflow-outflow member includes an upstream chamber inside the inflow-outflow member and between the inflow passage of the inflow-outflow member and the first passage of the intermediate member, and

the upstream chamber is larger than the inflowpassage and the first passage in cross-sectional area.

4. The control valve assembly according to claim 3, wherein

the housing includes a housing chamber inside the housing such that the first passage is between the upstream chamber and the housing chamber, and

the housing chamber is larger than the first passage in cross-sectional area.

5. The control valve assembly according to claim 1, wherein

the inflow-outflow member includes a partition separating an outlet of the inflow passage and an inlet of the outflow passage,

the partition is positioned in the inflow-outflow member to allow both a first connection state and a second connection state between the housing and the inflow-outflow member depending on a rotational position of the inflow-outflow member with respect to a central axis of the housing,

the first connection state is a state where the outlet of the inflow passage connects to a first end side of the in-housing passage while the inlet of the outflow passage connects to a second end side of the in-housing passage, and

the second connection state is a state where the inlet of the outflow passage connects to the second end side of the in-housing passage while the outlet of the inflow passage connects to the first end side of the in-housing passage.

6. The control valve assembly according to claim 5, wherein

the inflow-outflow member includes a first chamber and a second chamber on different sides of the partition, and

the outlet of the inflow passage is open in the first chamber, and the inlet of the outflow passage is open in the second chamber.

7. The control valve assembly according to claim 1, further comprising a tubular member which is a separate component from the inflow-outflow member and attached to the outflow portion.

8. The control valve assembly according to claim 1, further comprising a canister-side coupler and an engine-side coupler which are coupled to the inflow-outflow member, the canister-side coupler and the engine-side coupler are separate from each other and capable of being connected to pipes, the canister-side coupler and the engine-side coupler include an engaging portion which is attachable to and detachable from the inflow-outflow member.

9. The control valve assembly according to claim 8, wherein

the engine-side coupler includes two tubular portions capable of being connected to pipes, and

the two tubular portions are at positions facing each other.

10. The control valve assembly according to claim 8, wherein

the engine-side coupler includes two tubular portions capable of being connected to pipes, and

passage axes of the two tubular portions intersect each other.

11. The control valve assembly according to claim 1, further comprising a check valve disposed in the outflow passage of the outflow portion.

12. The control valve assembly according to claim 1, wherein

the inflow-outflow member includes a first outflow portion and a second outflow portion as the outflow portion,

the control valve assembly further comprising:

a check valve disposed inside the first outflow portion; and

a lid attached to the second outflow portion.

13. The controlvalve assembly according to claim 1, wherein

the inflow-outflow member includes a first outflow portion and a second outflow portion as the outflow portion,

the control valve assembly further comprising:

a first check valve disposed inside the first outflow portion; and

a second check valve disposed inside the second outflow portion.

14. The control valve assembly according to claim 1, wherein

the inflow-outflow member includes a first outflow portion and a second outflow portion as the outflow portion,

the first outflow portion and the second outflowportion face each other, and

the inflow portion extends in a direction intersecting a facing direction in which the first outflow portion and the second outflow portion face each other.

15. The control valve assembly according to claim 1, wherein

the inflow-outflow member includes a first outflow portion and a second outflow portion as the outflow portion,

the first outflow portion and the second outflow portion extend in directions intersecting with each other, and

the inflow portion extends along the first outflow portion or the second outflow portion.

16. The control valve assembly according to claim 1, further comprising a pressure detection port for detecting a pressure in the evaporative fuel passage.

17. A control valve assembly comprising:

a housing defining an in-housing passage therein and accommodating an electromagnetic valve that opens or closes the in-housing passage, a first end of the in-housing passage and a second end of the in-housing passage being open on a same opening side of the housing; and

an inflow-outflow member coupled to the opening side of the housing, the inflow-outflow member defining therein an inflow passage communicating with the first end of the in-housing passage, and an outflow passage communicating with the second end of the in-housing passage.