Solenoid valve fixing structure

Details Solenoid valve fixing structure Solenoid valve fixing structure

1999-04-15

2001-01-09

Chambers, A. Michael (Department: 3753)

Fluid handling

With casing, support, protector or static constructional...

C251S129150, C285S360000

Reexamination Certificate

active

06170516

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a solenoid valve fixing structure for fixing a solenoid valve to an intake manifold.
2. Description of the Prior Art
A system for reserving hydro-carbon gas using an activated carbon canister is well known; in which a hydro-carbon gas evaporated from the fuel in a fuel tank, due to engine heat or external heat, is temporally reserved in an activated carbon containing canister, and while the vehicle is running, the reserved gas is sent into the intake manifold of the engine of a vehicle so as to be burned out, for protecting the emission of the hydro-carbon gas into the atmosphere.
An apparatus for suppressing evaporated fuel gas emission, which uses such a system for reserving hydro-carbon gas in an activated carbon containing canister, has usually a solenoid valve for opening and closing channels for the evaporated fuel gas and/or the air. A solenoid valve fixing structure in the prior art, which is arranged between a canister and an intake manifold, is explained below.
FIG. 25
is a schematic diagram of an apparatus for suppressing the evaporated fuel gas emission in the prior art.
FIG. 26
is a plan view of a part of a fixing plate disposed at an intake manifold.
FIG. 27
is a partially cross-sectional view of a solenoid valve fixing structure according to the prior art.
Reference numeral
21
denotes a fuel tank, the fuel tank is connected with a separator
23
through a channel
22
. The evaporated gas from the fuel tank is separated into a liquid component and a gas component by the separator
23
. Reference numeral
24
denotes a pressure sensor for diagnosis, which detects pressure change of the evaporated fuel gas, for detecting leakage of the evaporated fuel gas while the vehicle is running. Reference numeral
25
denotes an activated carbon containing canister for reserving the evaporated fuel gas temporally. The canister
25
has an air introducing hole
26
, an evaporated fuel gas introducing hole
27
and an outlet hole
28
of the reserved fuel gas, which is lead to an intake manifold
29
of the engine.
The purge quantity of the evaporated fuel gas from the canister
25
to the intake manifold
29
is controlled by a solenoid valve
30
. As shown in
FIGS. 26 and 27
, the solenoid valve
30
is fixed to a fixing plate
31
, which projects from the intake manifold
29
. A bolt
34
fixes the solenoids valve
30
to a fixing hole
32
disposed in the fixing plate
31
. An insert bush
33
is disposed between the fixing plate
31
and the bolt
34
.
An air cut valve
35
controls the opening and closing of a channel communicating with the air introducing hole
26
of the canister
25
. Ordinarily, the air cut valve
35
keeps an opening state so that the air introducing hole
26
is open to the atmosphere. This air cut valve
35
is closed, only when the communication from the atmosphere shall be cut off, at diagnosis of the apparatus is made. The air cut valve
35
is connected to the air introducing hole
26
through a hose
36
.
The mounting of the solenoid valve onto the intake manifold
29
is carried out as follows: An insert bush
33
is previously set into the fixing plate
31
of the intake manifold
29
; A bolt
34
is inserted into the solenoid valve
30
; The bolt
34
is screwed into the insert bush
33
.
Due to such a structure, the solenoid valve fixing structure of the prior art has following drawbacks. First, a bolt
34
must be screwed into the insert bush
33
. Therefore the fixing is not easy and it takes a long time. Second, the solenoid valve
30
cannot be fixed compactly, because the solenoid valve is fixed onto a fixing plate
31
, jutting from the manifold
29
.
Of course, the fixing using a bolt
34
can be made easy, by changing the design of the external form of a solenoid valve
30
. However the change of a design entails to a high fabrication cost.
A box-formed solenoid valve installed on a manifold is disclosed in JP-A-6-185654, as another prior art. The solenoid valve described in it also requires a change of designing of its external form. Thus it entails to a high fabrication cost, too.
SUMMARY OF THE INVENTION
An object of the present invention is to eliminate these drawbacks of the prior art.
Another object is to propose a solenoid valve fixing structure, which is cheap in price and makes it possible to fix a solenoid valve to an intake manifold, without changing the external form of the existing solenoid valve.
Another object is to propose a solenoid valve fixing structure, in which a solenoid valve can be compactly received and can be fixed.
A solenoid valve fixing structure according to the present invention comprises a recessing portion and a fixing member having a fixing part, a deformable lip and an insertion lip. In this specification and Claims, the recessing portion is a portion of a member, where a recess is disposed for fixing a solenoid valve.
In an embodiment of the solenoid valve fixing structure of the present invention, the recessing portion has a first shoulder portion for defining the insertion position of the insertion lip and a second shoulder portion for defining the contacting position of the deformable lip.
In an embodiment of the solenoid valve fixing structure of the present invention, an engaging hole is disposed in the deformable lip, and an engaging claw is disposed in the recessing portion.
In an embodiment of the solenoid valve fixing structure of the present invention, a bolt clearance space is disposed in the recessing portion.
A solenoid valve fixing structure, as an embodiment of the present invention, comprises a recessing portion having a shoulder portion, a holding lip, and a fixing member having a fixing part, an insertion lip and an engaging claw.


REFERENCES:
patent: 4298020 (1981-11-01), Inada et al.
patent: 4330004 (1982-05-01), Yano et al.
patent: 4842010 (1989-06-01), Edgecomb et al.
patent: 8-185654 (1994-07-01), None
patent: 10-118010 (1998-04-01), None

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