NZ617259B - Fuel Nozzle - Google Patents
Fuel NozzleInfo
- Publication number
- NZ617259B NZ617259B NZ617259A NZ61725913A NZ617259B NZ 617259 B NZ617259 B NZ 617259B NZ 617259 A NZ617259 A NZ 617259A NZ 61725913 A NZ61725913 A NZ 61725913A NZ 617259 B NZ617259 B NZ 617259B
- Authority
- NZ
- New Zealand
- Prior art keywords
- filling nozzle
- safety valve
- safety
- valve
- tank
- Prior art date
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 11
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000007788 liquid Substances 0.000 claims abstract description 36
- 239000004202 carbamide Substances 0.000 claims abstract description 27
- 230000000875 corresponding Effects 0.000 claims abstract description 20
- 238000003780 insertion Methods 0.000 claims abstract description 17
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 12
- 230000000694 effects Effects 0.000 claims abstract description 8
- 239000000945 filler Substances 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 21
- 230000000903 blocking Effects 0.000 claims description 9
- 210000001699 lower leg Anatomy 0.000 claims description 6
- 238000000605 extraction Methods 0.000 claims description 4
- 239000002828 fuel tank Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 16
- 230000003993 interaction Effects 0.000 description 9
- 239000002283 diesel fuel Substances 0.000 description 7
- 230000014509 gene expression Effects 0.000 description 6
- 239000007789 gas Substances 0.000 description 4
- 230000002265 prevention Effects 0.000 description 4
- 239000003112 inhibitor Substances 0.000 description 3
- 230000002401 inhibitory effect Effects 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 241000321728 Tritogonia verrucosa Species 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000001627 detrimental Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052813 nitrogen oxide Inorganic materials 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035943 smell Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67C—CLEANING, FILLING WITH LIQUIDS OR SEMILIQUIDS, OR EMPTYING, OF BOTTLES, JARS, CANS, CASKS, BARRELS, OR SIMILAR CONTAINERS, NOT OTHERWISE PROVIDED FOR; FUNNELS
- B67C3/00—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus; Filling casks or barrels with liquids or semiliquids
- B67C3/02—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus
- B67C3/22—Details
- B67C3/26—Filling-heads; Means for engaging filling-heads with bottle necks
- B67C3/2637—Filling-heads; Means for engaging filling-heads with bottle necks comprising a liquid valve opened by relative movement between the container and the filling head
- B67C3/264—Filling-heads; Means for engaging filling-heads with bottle necks comprising a liquid valve opened by relative movement between the container and the filling head and the filling operation being carried out manually
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/42—Filling nozzles
- B67D7/54—Filling nozzles with means for preventing escape of liquid or vapour or for recovering escaped liquid or vapour
- B67D2007/545—Additional means for preventing dispensing of liquid by incorrect sealing engagement with the tank opening of the vapour recovering means, e.g. bellows, shrouds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/02—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring liquids other than fuel or lubricants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/32—Arrangements of safety or warning devices; Means for preventing unauthorised delivery of liquid
- B67D7/34—Means for preventing unauthorised delivery of liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/42—Filling nozzles
- B67D7/44—Filling nozzles automatically closing
- B67D7/46—Filling nozzles automatically closing when liquid in container to be filled reaches a predetermined level
- B67D7/48—Filling nozzles automatically closing when liquid in container to be filled reaches a predetermined level by making use of air suction through an opening closed by the rising liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/42—Filling nozzles
- B67D7/44—Filling nozzles automatically closing
- B67D7/50—Filling nozzles automatically closing and provided with an additional hand lever
Abstract
Disclosed is a filling nozzle for dispensing a liquid such as urea solution into a tank (16) of a motor vehicle. The filling nozzle includes safety means to ensure that the filling nozzle delivers the correct fuel to a vehicle fuel tank. The filling nozzle includes a main valve (5). A safety valve (7) is arranged downstream from the main valve (5). The safety valve (7) can be moved from a closed position to an open position by means of an opening movement directed in the upstream direction. A safety device (11) comprising a sliding sleeve has an operative connection with the safety valve (7). The operative connection between the safety device (11) and safety valve (7) is realised magnetically (10, 13). The safety device (11) is also designed to detect the insertion of the filling nozzle into a tank (16) provided for the corresponding liquid. The safety device (11) effects the movement of the safety valve (7) from the closed position into the open position when the filling nozzle is inserted into a tank (16) for the corresponding liquid. 7) is arranged downstream from the main valve (5). The safety valve (7) can be moved from a closed position to an open position by means of an opening movement directed in the upstream direction. A safety device (11) comprising a sliding sleeve has an operative connection with the safety valve (7). The operative connection between the safety device (11) and safety valve (7) is realised magnetically (10, 13). The safety device (11) is also designed to detect the insertion of the filling nozzle into a tank (16) provided for the corresponding liquid. The safety device (11) effects the movement of the safety valve (7) from the closed position into the open position when the filling nozzle is inserted into a tank (16) for the corresponding liquid.
Description
Fuel nozzle
The invention relates to a filling nozzle for
dispensing a liquid into a tank of a motor vehicle,
having a main valve.
Filling nozzles for the refuelling of motor vehicles
are known for example from EP 2 186 773 A1. Likewise
known are filling nozzles with a misfilling inhibitor
which is intended to ensure that dispensing of liquid
takes place only after said filling nozzle has been
inserted into a tank provided specifically for said
liquid. In simple cases, such a misfilling inhibitor
may merely comprise different diameters of the filling
nozzle outlet pipe and of the filler neck of the
associated tank, as is known for example in the case of
filling nozzles for gasoline and diesel fuels.
As exhaust-gas standards become ever more stringent,
some motor vehicles require auxiliary liquids which are
intended to ensure low-emission combustion and thus
reduce exhaust gas emissions. A known example here is
in particular a 32.5% urea solution (known under the
trade name AdBlue) which serves for reducing the
nitrogen oxide emissions of diesel engines.
Urea solution is already widely used as an auxiliary
liquid in the heavy goods vehicle sector, but in future
will also be used in diesel passenger motor vehicles.
The significance of a misfilling inhibitor will thus
increase if passenger motor vehicles, too, are to have
two tanks, one for diesel fuel and one for an auxiliary
liquid such as urea solution.
5608139_1 (GHMatters) P94913.NZ BENB
It is therefore the object of the invention to provide
a filling nozzle of the type mentioned in the
introduction, which filling nozzle provides the
possibility of improved safety against misfilling and
can be implemented without problems in the filling
station environment, or to at least provide the public
with a useful alternative to known filling nozzles.
The invention achieves said object in that a safety
valve is arranged downstream of the main valve, which
safety valve can be moved from a closed position into
an open position by means of an opening movement
directed in an upstream direction, and in that a safety
device is provided which has an operative connection to
the safety valve and which is designed to detect the
insertion of the filling nozzle into a tank provided
for the corresponding liquid and which effects a
movement of the safety valve from the closed position
into the open position when an insertion of the filling
nozzle into a tank provided for the corresponding
liquid is detected.
Some expressions used within the context of the
invention will firstly be explained.
A filling nozzle is a device for controlling the liquid
flow during a tank filling process. The demands on the
construction and mode of operation of automatic filling
nozzles for use on filling pumps are governed by DIN EN
13012 Doc. 2001. Expressions defined in said standard
are also used in the present application.
The feature “for dispensing a liquid into a tank of a
motor vehicle” expresses the suitability of the filling
nozzle for such a tank filling process.
5608139_1 (GHMatters) P94913.NZ BENB
The user controls the output of liquid by means of the
main valve. An actuating lever (also referred to as
switching lever) is generally used to actuate the main
valve. The outlet pipe is the device through which the
liquid is conducted into the vessel to be filled.
An additional safety valve is arranged downstream, that
is to say in the intended flow direction of the liquid
from the main valve to the outlet pipe. Said safety
valve can be moved from a closed position, in which it
blocks the liquid flow even when the main valve is
open, into an open position by means of an opening
movement directed upstream. This means that said safety
valve must be opened counter to the flow direction of
the outflowing liquid, and if appropriate counter to a
pressure built up by said liquid. A further element of
the filling nozzle according to one aspect of the
invention is a safety device which is designed to
detect the insertion of the filling nozzle into a tank
provided for the corresponding liquid.
The safety device is preferably designed to interact
with a filler neck of a tank provided for the
corresponding liquid. Said safety device is preferably
moved from the blocking position into the enable
position automatically by the insertion of the filling
nozzle into the tank filler neck designed for the same.
After the filling nozzle is inserted into the
corresponding tank filler neck, the tank filling
process can thus be commenced by actuating the
actuating lever.
The safety device may for example be provided for
interacting with the structural/mechanical
configuration of a corresponding tank filler neck. Urea
tanks in motor vehicles generally have a tank filler
5608139_1 (GHMatters) P94913.NZ BENB
neck which tightly surrounds the outlet pipe of the
associated filling nozzle already in the direct
vicinity of the inlet region. The safety device may for
example have an element which is arranged in a
displaceable manner in the region of the outlet pipe
and which is pushed from the blocking position into the
enable position by the face-side edge of the tank
filler neck, as will be described in more detail
further below. Alternatively, the safety device may for
example interact magnetically with a magnet arranged in
the region of the tank filler neck.
The safety device is operatively connected to the
safety valve. When the safety device detects an
insertion into a suitable tank, an opening movement of
the safety valve is effected by way of said operative
connection. The safety valve thus moves, with an
upstream direction component, from the closed position
into the open position. Misfilling is prevented in this
way.
The safety device may be designed as a detector, the
safety valve may have a corresponding actuator, and the
operative connection may for example be realized
electrically.
Within the context of the invention, however, it is
preferable for the operative connection between the
safety device and safety valve to be realized without
external energy. External energy is any form of energy
which is supplied specifically for the operation of the
safety device or which is extracted from an energy
source arranged in the filling nozzle. The expression
external energy encompasses in particular electrical
energy, and thus the filling nozzle according to an
embodiment of the invention operates without electrical
5608139_1 (GHMatters) P94913.NZ BENB
energy and therefore does not require an external
electrical energy supply or an internal electrical
energy source, for example a battery. The expression
“operative connection between the safety device and
safety valve” denotes, in functional terms, the
actuation/manipulation of the safety valve by the
safety device such that no opening of the safety valve
takes place when the safety device is in the blocking
position.
The design of the safety device according to an
embodiment of the invention, and the operative
connection thereof to the safety valve without external
energy, in particular electrical energy, permits the
use of the filling nozzle according to the invention in
the direct vicinity of other filling nozzles which
dispense fuel, and which must therefore satisfy
particularly high demands with regard to explosion
prevention. For example, an embodiment of the invention
makes it possible for a filling nozzle for dispensing
urea solution to be arranged in the direct vicinity of
diesel or gasoline filling nozzles, for example on the
same filling pump.
By contrast, filling nozzles known from the prior art
which are used for urea solution and which have a
corresponding safety device for preventing against
misfilling require electrical energy for sensors which
are intended to detect the insertion of the filling
nozzle into a special so-called AdBlue tank and thus
prevent misfilling. Said known filling nozzles must
therefore be arranged remote from fuel filling pumps in
order to satisfy the explosion prevention requirements.
This makes a tank filling process for both diesel and
also urea solution very much more cumbersome owing to
the additional maneuvering process that is required.
5608139_1 (GHMatters) P94913.NZ BENB
For heavy goods vehicles used in the commercial sector,
this may be acceptable, but in the passenger motor
vehicle sector, such a dual tank filling process, with
the vehicle having to be moved in between, would be
unacceptable. The invention makes it possible for
filling nozzles for urea solution to be combined with
those for diesel fuel in close proximity, for example
on a single filling pump.
According to an embodiment of the invention, the
operative connection between the safety device and
safety valve is realized magnetically. For example, the
safety device may have an element which can be
displaced by the insertion of the outlet pipe of the
filling valve into a tank provided for the same, and
which has a magnet, the displacement of which effects
an opening movement of said safety valve owing to
interaction with a magnet arranged on the safety valve,
for example on the valve shank thereof. Alternatively,
a corresponding magnet may be arranged in the region of
the tank filler neck, which magnet interacts with the
magnet of the valve shank. The insertion of the filling
nozzle into the tank takes place with the main valve
closed, and thus the region of the filling nozzle
downstream of the main valve is unpressurized, such
that, before the opening of the main valve, the opening
movement of the safety valve can be effected by means
of even relatively low magnet forces because said
opening movement does not need to take place counter to
the back pressure of liquid present upstream of the
safety valve.
The safety valve is preferably arranged in the region
of the outlet pipe, and the valve seat may be arranged
in the region of the outlet end of the outlet pipe. The
valve and valve shank are preferably designed such that
5608139_1 (GHMatters) P94913.NZ BENB
the safety valve is preloaded into the closed position
by liquid pressure in the outlet pipe. In this way, the
sealing action of the safety valve is intensified if,
owing to incorrect operation, the main valve is opened
before the safety valve has detected an insertion into
a suitable tank filler neck and thereby opened the
safety valve. Misfilling is thus reliably prevented
even in the case of incorrect operation.
In a preferred embodiment of the invention, a sliding
sleeve which is displaceable axially relative to the
outlet pipe may be arranged in the region of the
outlet, which sliding sleeve has arranged thereon or
connected thereto an operative magnet that interacts
with the magnetically actuable safety valve. Here, the
expression “operative magnet” refers merely to the fact
that the magnet is designed for corresponding
interaction with, and thus operative connection to, the
safety valve. According to an embodiment of the
invention, an operative magnet of said type may also be
arranged on or in the region of the safety valve. It is
possible for one or more magnets to be provided either
exclusively on the safety valve or exclusively in the
region of said sliding sleeve, which magnet or magnets
interact(s) with a magnetizable material of the
corresponding counterpart element (sliding sleeve or
safety valve), such as for example iron or iron alloys.
It is however preferable if corresponding magnets are
arranged both on the sliding sleeve and also the safety
valve. Where reference is made, within the context of
the invention, to magnets or a magnetic interaction,
permanent magnets are preferably used.
It may be possible for the sliding sleeve to be
automatically displaced from a blocking position into
an enable position by the insertion of the filling
5608139_1 (GHMatters) P94913.NZ BENB
nozzle into a tank filler neck designed for the same.
Said displacement of the sliding sleeve then effects a
magnetic opening of the safety valve, such that, after
the insertion into the correspondingly designed tank
filler neck, the main valve of the filling nozzle can
be opened by means of the actuating lever, and the tank
filling process can be commenced.
The filling valve according to an embodiment of the
invention may additionally have a gas extraction
device, such as is basically known from the prior art.
Since ammonia can be formed as a result of the
breakdown of urea, such a gas extraction device can
contribute to the prevention or reduction of an
unpleasant smell during the filling of a tank with
urea.
Automatic filling nozzles generally have a safety shut-
off means which automatically stops the tank filling
process when the tank is full. For this purpose, the
outlet pipe has a so-called sensor line which
communicates pneumatically with a triggering device,
arranged in the region of the main valve, for said main
valve. The details of the design of a safety shut-off
means of said type are well known to a person skilled
in the art and are disclosed for example in EP 2 386
520 A1. If, during the course of a tank filling
process, the liquid level reaches the end of the outlet
pipe and thus the inlet of the sensor line, the
pressure conditions in the sensor line change and lead
to a triggering, and thus a closure, of the main valve.
According to an embodiment of the invention, it is
advantageous if a safety shut-off means of said type is
additionally designed to close the main valve if the
back pressure between the main valve and safety valve
rises above a predetermined threshold value. If the
5608139_1 (GHMatters) P94913.NZ BENB
main valve is opened by means of the actuating lever
when the safety valve is still closed, the pressure in
the outlet pipe upstream of the safety valve rises up
to the operating pressure that prevails upstream of the
main valve, said operating pressure being produced by
the pump of the filling pump. The result is an
increased pressure difference between the pressure in
the outlet pipe, on the one hand, and in the sensor
line of the safety shut-off means, on the other hand
(details with regard to these expressions can be found
in EP 2 386 520 A1), and said increased pressure
difference leads to a triggering of the safety shut-off
means and thus a decoupling of the main valve from the
actuating lever; the main valve can then be moved into
the closed position again by the closing spring. Said
additional safety measure prevents a situation in
which, in the event of incorrect operation (the
actuating lever being pulled when the filling nozzle is
not correctly inserted), the entire operating pressure
prevailing at the filling nozzle must initially be held
back by the safety valve alone, and dissipated via the
sensor line with a time delay.
The 32.5% aqueous urea solution, used as AdBlue, is a
highly concentrated salt solution. If drips fall from a
filling nozzle for urea solution during the handling
thereof, conspicuous salt marks form after the solvent,
water, evaporates. The safety valve according to the
invention can additionally perform the function of a
drip prevention valve in the region of the outlet end.
It prevents residual amounts of liquid still present in
the outlet pipe from dripping out when the safety valve
is closed.
5608139_1 (GHMatters) P94913.NZ BENB
Also disclosed herein is a filling nozzle according to
the invention which is designed for dispensing urea
solution.
Also disclosed herein is a filling pump for the
combined dispensing of fuels and urea solution, which
filling pump has at least one filling nozzle for
dispensing fuel (in particular diesel fuel). Said
filling pump also has at least one filling nozzle as
set forth above for dispensing urea solution. Such a
filling pump permits a convenient simultaneous or
directly successive tank filling process with fuel, in
particular diesel fuel, and urea solution. Maneuvering
of the vehicle in between is not necessary. The
configuration of the filling nozzle according to the
invention for dispensing urea solution without the
supply of external energy, in particular electrical
energy, allows it to be used in the direct vicinity of
a filling pump for dispensing fuels.
An exemplary embodiment of the invention will be
described below on the basis of the drawing, in which:
Figure 1 shows a section through a filling nozzle
according to an embodiment of the invention;
Figure 2 shows a state in which the filling nozzle
according to the embodiment of the invention
is partially inserted into the tank filler
neck of an associated urea tank;
Figure 3 shows a state in which the filling nozzle
according to the embodiment of the invention
is fully inserted into the tank filler neck
of an associated urea tank;
5608139_1 (GHMatters) P94913.NZ BENB
Figure 4 shows the situation when a filling nozzle
according to the embodiment of the invention
is inadvertently inserted into a tank filler
neck for unleaded gasoline or diesel fuel;
Figure 5 shows an alternative embodiment of the
invention, inserted into a passenger motor
vehicle tank filler neck with annular
magnet;
Figure 6 shows the alternative embodiment of the
invention, inserted into a heavy goods
vehicle tank filler neck with annular
magnet;
Figure 7 shows the embodiment of Figures 1-4 inserted
into a passenger motor vehicle tank filler
neck with annular magnet.
A filling nozzle (also referred to colloquially as
"pistol-grip nozzle") according to an embodiment of the
invention has a valve housing 1, an inlet 2, connected
to a hose (not illustrated), for liquid, an outlet pipe
3 and a switching lever 4. In a known manner described
for example in EP 2 386 520 A1, the switching lever 4
actuates the main valve 5 of the filling nozzle. A
sensor line 6 communicates pneumatically with the
surroundings of the outlet end of the outlet pipe 3,
and can thus, in a conventional manner as described in
the cited EP document, effect a complete shut-off of
the tank.
In the region of the outlet end of the outlet pipe 3
there is provided a safety valve 7 which, downstream,
closes against a valve seat 8. The upstream end of the
valve shank 9 is provided with a magnet 10.
5608139_1 (GHMatters) P94913.NZ BENB
A sliding sleeve 11 is arranged around the outer
circumference of the outlet pipe 3 in the region of the
outlet end. The sliding sleeve 11 is preloaded by a
compression spring 12 into the blocking position
illustrated in Figure 1, in which said sliding sleeve
is situated in an axial end position in the direction
of the outlet end of the outlet pipe 3. An annular
operative magnet 13 is arranged on the sliding sleeve
11. The sliding sleeve 11 is received in a displaceable
manner in a cylindrical pocket 14 which concentrically
surrounds the outer circumference of said sliding
sleeve, which pocket also receives the compression
spring 12.
In the position shown in Figure 1, the safety valve is
preloaded into the closed position by the magnetic
interaction between the operative magnet 13 and magnet
In the operating state illustrated in Figure 1 with the
safety valve 7 closed, if the actuating lever 4 is
pulled, the main valve 5 firstly opens and allows
liquid to flow into the outlet pipe 3. The pressure
therein rises because the safety valve 7 does not allow
said liquid to flow out of the outlet pipe 3. If the
pressure rises above a defined threshold value, a
differential pressure is generated across the means,
indicated at 15, for completely shutting off the tank,
or across the diaphragm of said means, such that said
differential pressure triggers the means for completely
shutting off the tank and decouples the actuating lever
4 from the main valve 5 in a known way, such that the
main valve 5 is closed again by its closing spring. The
threshold value for the pressure at which such
triggering takes place lies above the pressure that
5608139_1 (GHMatters) P94913.NZ BENB
prevails in the outlet pipe 3 during a conventional
tank filling process, and below the operating pressure
(provided by the pump of the filling pump) at the inlet
2 of the filling nozzle.
Figure 2 shows a state in which the filling nozzle
according to the embodiment of the invention is
partially inserted into the tank filler neck of an
associated urea tank. The safety valve 7 is, as before,
closed.
In Figure 3, the outlet end of the outlet pipe 3 is
fully inserted into the tank neck 16 of a urea tank of
a passenger motor vehicle. Said tank neck is designed
so as to tightly surround the outlet pipe already in
the direct vicinity of the start of the filler neck, as
illustrated in Figure 3. The annular face surface of
the sliding sleeve 11 abuts against the corresponding
counterpart surface of the tank filler neck 16, and the
sliding sleeve 11 is displaced from the blocking
position illustrated in Figures 1 and 2 into the enable
position illustrated in Figure 3, counter to the
pressure of the spring 12. In said enable position, the
upstream end of the sliding sleeve 11 abuts against a
stop. The operative magnet 13 is correspondingly also
displaced axially together with the sliding sleeve 11.
Owing to the magnetic operative connection between the
operative magnet 13 and the magnet 10 on the valve
shank 9, the safety valve 7 is moved into the open
position illustrated in Figure 3. Said opening movement
takes place in the upstream direction. The tank filling
process can be commenced by virtue of the switching
lever 4 being pulled and the main valve 5 thereby being
opened. The outflow of liquid through the outlet pipe 3
is such that the safety valve 7 remains in its open
position and the tank filling process can be performed.
5608139_1 (GHMatters) P94913.NZ BENB
The tank filling process can be ended in the
conventional way by releasing or unlocking the
actuating lever 4. If the tank has been substantially
filled, the end of the outlet pipe 3, and thus also the
sensor line 6, are immersed in liquid. The pressure
difference that is thus effected pneumatically effects
a shut-off of the main valve, and thus a termination of
the tank filling process, in a conventional manner
described for example in EP 2 386 520 A1.
The tank filling process is likewise ended if the
filling nozzle is pulled out of the tank filler neck 16
and the sliding sleeve 11 is pushed from the enable
position in Figure 3 back into the blocking position of
Figure 1 or 2 by means of the spring 12. Owing to the
magnetic interaction between the annular magnet 13
(operative magnet 13) and the magnet 10, the safety
valve 7 is moved, in the downstream direction, back
into its closed position. If the main valve 5 is now
still open, the pressure rise in the outlet pipe 3
results in an above-described triggering of the means
for completely shutting off the tank, and thus a
closure of the main valve 5.
Gases escaping during the course of the tank filling
process can, in a conventional manner, be recirculated
by the filling nozzle through a gas extraction duct
(not illustrated).
Figure 4 shows the situation when a filling nozzle
according to the embodiment of the invention is
inadvertently inserted into a tank filler neck for
unleaded gasoline or diesel fuel. The sliding sleeve 11
remains, in any case, in the blocking position, such
that no tank filling process can take place. If the
5608139_1 (GHMatters) P94913.NZ BENB
actuating lever 4 is nevertheless pulled, the pressure
rise in the outlet pipe 3 with the safety valve 7
closed leads to a triggering of the means 15 for
completely shutting off the tank, and thus again to a
closure of the main valve.
Figures 5 and 6 show a further embodiment of the
invention. The sliding sleeve 11 is omitted in this
embodiment. The preloading of the safety valve 7 into
the closed position is realized here by means of a
closing spring 12’ assigned directly to the safety
valve 7.
Here, the opening of the safety valve 7 counter to the
force of the spring 12’ takes place, during the
insertion process into a tank filler neck, by
interaction of the magnet 10 with an annular magnet
arranged in the tank filler neck.
Figure 5 shows this embodiment of the invention
inserted into a passenger motor vehicle filler neck for
urea solution, said filler neck having an annular
magnet 13’. After the filling nozzle has been fully
inserted into the neck, magnetic interaction occurs
between the magnet 10 and the magnet 13’, such that the
safety valve 7 opens and the tank filling process can
be commenced.
Figure 6 shows this embodiment of the invention
inserted into a filler neck for urea solution in a
heavy goods vehicle, said filler neck being of slightly
different construction. Here, too, after the filling
nozzle has been fully inserted, the safety valve 7 is
opened by interaction of the magnet 10 with an annular
magnet 13’’ arranged in the filler neck.
5608139_1 (GHMatters) P94913.NZ BENB
Figure 7 shows the embodiment of Figures 1-4 inserted
into a filler neck which has an annular magnet 13’. It
can be seen that, in this case, the opening of the
safety valve 7 is realized in the conventional manner
by interaction between the magnet 10 and the magnet 13.
The magnet 13’ arranged in the filler neck does not
have a detrimental effect because it is arranged
spatially too far away from the magnet 10.
5608139_1 (GHMatters) P94913.NZ BENB
Claims (13)
1. A filling nozzle for dispensing a liquid into a tank of a motor vehicle, having a main valve, and 5 a safety valve arranged downstream of the main valve, which safety valve can be moved from a closed position into an open position by means of an opening movement directed in an upstream direction, and in that a safety device is provided 10 which has an operative connection to the safety valve and which is designed to detect the insertion of the filling nozzle into a tank provided for the corresponding liquid and which effects a movement of the safety valve from the 15 closed position into the open position when an insertion of the filling nozzle into a tank provided for the corresponding liquid is detected.
2. A filling nozzle according to Claim 1, wherein the 20 operative connection between the safety device and safety valve is realized without external energy.
3. A filling nozzle according to Claim 2, wherein the operative connection between the safety device and 25 safety valve is realized magnetically.
4. A filling nozzle according to one of Claims 1 to 3, wherein the safety valve is arranged in the region of an outlet pipe.
5. A filling nozzle according to Claim 4, wherein the safety valve has a valve seat in the region of an outlet end of the outlet pipe. 35
6. A filling nozzle according to claim 4 or 5, wherein the safety valve is preloaded into the 5608139_1 (GHMatters) P94913.NZ BENB closed position by liquid pressure in the outlet pipe.
7. A filling nozzle according to Claim 6, wherein the 5 safety device comprises an axially displaceable sliding sleeve in the region of the outlet, wherein, on the sliding sleeve, there is arranged an operative magnet that interacts with a magnetically actuable safety valve.
8. A filling nozzle according to Claim 7, wherein the safety valve has, arranged on a valve shank, a magnet for interacting with the operative magnet. 15
9. A filling nozzle according to Claim 7 or 8, wherein the sliding sleeve can be displaced from a blocking position into an enable position by the insertion of the filling nozzle into a corresponding tank filler neck.
10. A filling nozzle according to any one of the preceding claims, further comprising a gas extraction device. 25
11. A filling nozzle according to any one of the preceding claims, comprising a safety shut-off means which stops the filling process by closing the main valve when a full tank is detected, and in that said safety shut-off means is additionally 30 designed to close the main valve if the back pressure between the main valve and safety valve rises above a predetermined threshold value.
12. A filling nozzle according to any one of the 35 preceding claims designed for dispensing urea solution. 5608139_1 (GHMatters) P94913.NZ BENB
13. A filling pump for the combined dispensing of fuels and urea solution, having at least one filling nozzle for dispensing fuel, wherein said 5 filling pump has at least one filling nozzle according to Claim 12 for dispensing urea solution. 5608139_1 (GHMatters) P94913.NZ BENB 5608139_1 (GHMatters) P94913.NZ BENB 5608139_1 (GHMatters) P94913.NZ BENB 5608139_1 (GHMatters) P94913.NZ BENB 5608139_1 (GHMatters) P94913.NZ BENB 5608139_1 (GHMatters) P94913.NZ BENB 5608139_1 (GHMatters) P94913.NZ BENB 5608139_1 (GHMatters) P94913.NZ BENB
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12192496.3A EP2733113B1 (en) | 2012-11-14 | 2012-11-14 | Fuel valve with a safety valve |
EP12192496.3 | 2012-11-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
NZ617259A NZ617259A (en) | 2014-10-31 |
NZ617259B true NZ617259B (en) | 2015-02-03 |
Family
ID=
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