NZ711536A - Fuel blending hose and fuel dispensing unit - Google Patents
Fuel blending hose and fuel dispensing unitInfo
- Publication number
- NZ711536A NZ711536A NZ711536A NZ71153615A NZ711536A NZ 711536 A NZ711536 A NZ 711536A NZ 711536 A NZ711536 A NZ 711536A NZ 71153615 A NZ71153615 A NZ 71153615A NZ 711536 A NZ711536 A NZ 711536A
- Authority
- NZ
- New Zealand
- Prior art keywords
- fuel
- hose
- hose portion
- dispensing unit
- line
- Prior art date
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 208
- 238000002156 mixing Methods 0.000 title description 2
- 238000011084 recovery Methods 0.000 claims description 9
- TVMXDCGIABBOFY-UHFFFAOYSA-N Octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 6
- 238000011109 contamination Methods 0.000 description 4
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Abstract
The invention relates to a fuel hose (7) for delivering multiple-grades of fuel, comprising a first hose portion (9) having a first length (L1) and a first diameter (D1), and a second hose portion (10) having a second length (L2) and a second diameter (D2). The first hose portion (9) comprises a first fuel line (11) and a second fuel line (12), and the second hose portion (10) comprises a third fuel line (13), the first fuel line (11) and the second fuel line (12) being fluidly connected to the third fuel line (13). The fuel hose (7) is characterized in that the first diameter (D1) of the first hose portion (9) is larger than the second diameter (D2) of the second hose portion (10). The invention further relates to a fuel dispensing unit (1). st fuel line (11) and a second fuel line (12), and the second hose portion (10) comprises a third fuel line (13), the first fuel line (11) and the second fuel line (12) being fluidly connected to the third fuel line (13). The fuel hose (7) is characterized in that the first diameter (D1) of the first hose portion (9) is larger than the second diameter (D2) of the second hose portion (10). The invention further relates to a fuel dispensing unit (1).
Description
FUEL BLENDING HOSE AND FUEL DISPENSING UNIT
Technical field
The invention relates to a fuel hose for delivering multiple-grades of
fuel, and a fuel dispensing unit having such a fuel hose.
Background art
Some fuel dispensing systems include multiple-grade fuel sources with
single or multiple fuel outlets for dispensing various grades of fuel. Each fuel
source may include a pump to dispense the fuel from its source to its
respective meter for measuring the volume of fuel. The fuel then remains in
its original concentration or it is blended with other fuels to form a separate
concentration before reaching the fuel outlet. A problem with these systems
occurs when a single fuel outlet or fuel line dispenses multiple grades of fuel.
Lower grades of fuel can remain in the system while the user attempts to
obtain a higher grade of fuel. This contamination can often present a lower
grade of fuel than required. One solution is to leave the lower grade of fuel in
the system and combine it with higher grade, hoping that the combination
would have sufficient grade to satisfy state and federal regulations. However,
this can be disadvantageous for users who only dispense a small volume of
fuel since the volume within the system creates a large variation on the grade
of the fuel and places a design limitation on the system due to the small
volume. Another solution is to place residual high grade fuel in the system in
order to compensate for the lower grade fuel previously dispensed. However,
this can complicate the system and fail to give the user the expected grade of
fuel when the highest grade has been selected or a small volume is desired.
US-5,908,055 discloses a fuel dispenser for dispensing different types
of fuel. The fuel dispenser has a dispenser housing and a fuel pumping unit
for each type of fuel to be dispensed mounted in the dispenser housing. The
fuel dispenser further has a hose comprising three separate fuel lines for
dispensing three various grades of fuel. A problem with such a hose is that it
requires a large diameter which makes the hose inflexible. Another problem is
that since the fuel lines will have to be small in order to fit within the hose, the
fuel flow rate in said fuel lines will be limited.
Summary of the invention
It is an objective of the present invention to provide an improvement of
the above technique and prior art. More particularly, it is an objective of this
invention to provide an improved fuel hose for dispensing several different
grades of fuel with minimal contamination.
According to a first aspect, these and other objects, and/or advantages
that will be apparent from the following description of embodiments, are
achieved, in full or at least in part, by a fuel hose for delivering multiple-
grades of fuel, comprising a first hose portion having a first length and a first
diameter, and a second hose portion having a second length and a second
diameter. The first hose portion comprises a first fuel line and a second fuel
line, and the second hose portion comprises a third fuel line, the first fuel line
and the second fuel line being fluidly connected to the third fuel line. The fuel
hose is characterized in that the first diameter of the first hose portion is
substantially larger than the second diameter of the second hose portion. The
fuel lines are separated in the first hose portion and the problem of
contamination is therefore limited to the second hose portion. The fuel hose is
further advantageous in that the second diameter of the second hose portion,
which is the hose portion that is moved around and bended by the user during
refueling, is smaller than the diameter of the first hose portion. This allows the
first hose portion to accommodate a plurality of fuel lines while the second
hose portion (accommodating one fuel line only) will be kept flexible and user-
friendly due to its smaller diameter. Further, the larger diameter of the first
hose portion may accommodate fuel lines having a diameter that provides for
a satisfying fuel flow rate in the fuel hose.
The first length of the first hose portion may be longer than the second
length of the second hose portion. This is advantageous in that the part of the
hose that risks contaminating the fuel, when a user attempts to obtain a
higher grade of fuel and there are remains of lower grades of fuel left in the
hose, will be kept to a minimum. The fuel lines are separated in the first hose
portion and the problem of contamination is therefore limited to the second
hose portion, which portion has a length smaller than the length of the first
hose portion
In one preferred embodiment of the invention, the first fuel line may be
adapted to deliver a fuel of a first grade, the second fuel line is adapted to
deliver a fuel of a second grade, and the third fuel line is adapted to deliver a
fuel of the first grade, the second grade or a mix of the first grade and the
second grade. The first grade may be 92 octane, the second grade may be
98 octane, and the mix of the first grade and the second grade may be 95
octane.
The first fuel line and the second fuel line may be coaxially arranged in
the first hose portion, which is a space efficient solution that helps keeping the
first diameter of the first hose portion to a minimum.
The fuel hose may further comprise a vapour recovery line extending
within the first hose portion and the second hose portion. The vapour
recovery is performed by a system which is incorporated in the fuel
dispensing unit, such that vapour of hydrocarbons are prevented from
escaping to the environment outside the tank of the motor vehicle. The
vapour recovery line, the first fuel line and the second fuel line is preferably
coaxially arranged in the first hose portion of the fuel hose, and the vapour
recovery line and the third fuel line is preferably coaxially arranged in the
second hose portion of the fuel hose.
The first hose portion may substantially extend from a top section of a
fuel dispensing unit to a bottom section of the fuel dispensing unit, and the
second hose portion may substantially extend from the bottom section of the
fuel dispensing unit to a mid section of the fuel dispensing unit. This way, the
part of the fuel hose with the smaller diameter (i.e. the second hose portion)
will constitute the part of the fuel hose that is moved around and bended by
the user during refueling. In turn, the fuel hose will be flexible and user-
friendly. Preferably, the first length of first hose portion constitutes at least 4/7
of the entire length of the fuel hose. Naturally, other configurations of the fuel
hose are possible. For example, the first hose portion may substantially
extend from the mid section of the fuel dispensing unit to the top section of
the fuel dispensing unit and from the top section of the fuel dispensing unit to
the bottom section of the fuel dispensing unit, and the second hose portion
may substantially extend from the bottom section of the fuel dispensing unit to
the mid section of the fuel dispensing unit.
The first hose portion may be connected to the second hose portion by
means of a connection means, or the first hose portion and the second hose
portion may be integrally formed. Both are preferred embodiments of the
invention.
According to a second aspect, these and other objects are achieved, in
full or at least in part, by a fuel dispensing unit for refueling a vehicle,
comprising a fuel hose according to the features described above.
Other objectives, features and advantages of the present invention will
appear from the following detailed disclosure, from the attached claims, as
well as from the drawings. It is noted that the invention relates to all possible
combinations of features.
Generally, all terms used in the claims are to be interpreted according
to their ordinary meaning in the technical field, unless explicitly defined
otherwise herein. All references to “a/an/the [element, device, component,
means, step, etc.]” are to be interpreted openly as referring to at least one
instance of said element, device, component, means, step, etc., unless
explicitly stated otherwise.
As used herein, the term “comprising” and variations of that term are
not intended to exclude other additives, components, integers or steps.
As used herein, the term “diameter” refers to the inner diameter of the
fuel hose.
Brief description of the drawings
The above, as well as additional objects, features and advantages of
the present invention, will be better understood through the following
illustrative and non-limiting detailed description of embodiments of the present
invention, with reference to the appended drawings, where the same
reference numerals may be used for similar elements, and wherein:
Fig. 1a is a perspective view of a fuel dispensing unit according to one
exemplary embodiment of the second aspect of the invention, and
Fig. 1b is a perspective view of a fuel hose according to one exemplary
embodiment of the first aspect of the invention.
Detailed description of preferred embodiments of the invention
Fig. 1a illustrates a fuel dispensing unit 1 for refueling motor vehicles.
The fuel dispensing unit 1 has an electrical cabinet 2 containing all the
electronics for the fuel dispensing unit 1, a hydraulic cabinet 3 containing fuel
dispensing means (not shown), e.g. fuel metering means, valves, vapour
recovery system etc, a pump display 4 showing pump data, and a payment
terminal (not shown). The fuel dispensing unit 1 is connected to an
underground reservoir (not shown) containing fuel. When filling up the tank of
a motor vehicle, the fuel is pumped from the underground reservoir by means
of a pump (not shown) which is located in the hydraulic cabinet 3, and from
there to a nozzle 5 via a fuel pipe (not shown) and a fuel hose 7. When filling-
up does not take place, the fuel hose 7 hangs along the fuel dispensing unit
1, and the nozzle 5 is inserted in a nozzle boot 8.
In Fig. 1b, a section of the fuel hose 7 is illustrated in an enlarged view.
The fuel hose 7 is adapted for delivering multiple-grades of fuel and
comprises a first hose portion 9 having a first length L1 and a first diameter
D1, and a second hose portion 10 having a second length L2 and a second
diameter D2. The first hose portion 9 comprises a first fuel line 11 and a
second fuel line 12 which are coaxially arranged, and the second hose portion
9 comprises a third fuel line 13. The first fuel line 11 and the second fuel line
11 are in fluid communication with the third fuel line 13. The first length L1 of
the first hose portion 9 is longer than the second length L2 of the second hose
portion 10, and the first diameter D1 of the first hose portion 6 is larger than
the second diameter D2 of the second hose portion 10. The first fuel line 11 is
adapted to deliver a fuel of a first grade (such as 92 octane), the second fuel
line 12 is adapted to deliver a fuel of a second grade (such as 98 octane), and
the third fuel line is adapted to deliver a fuel of the first grade, the second
grade or a mix (such as 95 octane) of the first grade and the second grade. In
the latest case, fuel of the first grade is delivered through the first fuel line 11
simultaneously as the fuel of the second grade is delivered through the
second fuel line 12. The fuel of the first grade and the fuel of the second
grade are then mixed in the third fuel line 13 before reaching the nozzle 5.
The fuel hose 7 further comprises a vapour recovery line 14 which extend
along the entire length of the fuel hose 7. When filling the tank of a motor
vehicle, it is a common measure to recover the vapour escaping the tank
when filling it with liquid fuel from the fuel dispensing unit 1. The vapour
recovery is performed by a system which is incorporated in the fuel
dispensing unit 1, such that vapour of hydrocarbons are prevented from
escaping to the environment outside the tank of the motor vehicle. Such a
vapour recovery system typically consists of a vapour pump (not shown), a
flow meter (not shown) and a vapour inlet (not shown) arranged at the nozzle
. The recovered vapour is returned to the underground fuel reservoir. The
vapour pump draws fuel vapour from the tank of the motor vehicle, through
the vapour flow meter, and down to the fuel reservoir.
The first hose portion 9 and the second hose portion 10 are connected
to each other by means of a connections means 15. The connections means
consists of a joint manufactured by metal which joins the two portions
together. The first hose portion 9 extends substantially from the top section of
the fuel dispensing unit 1 and downwards, in a vertical direction, to the bottom
section of the fuel dispensing unit 1. The first hose portion 9 extends
substantially from the bottom section of the fuel dispensing unit 1 and
upwards, in a vertical direction, to the mid section of the fuel dispensing unit
1. The first hose portion 9 is merely used for transport of fuel and fuel vapour
and has no requirements regarding flexibility and mobility, while the second
hose portion 10, which is the portion of the fuel hose 7 that is moved around
by a user when refueling a vehicle, must fulfill certain requirements regarding
flexibility and mobility. In view thereof, the first diameter D1 of the first hose
portion 9 can be allowed to be larger than the second diameter D2 of the
second hose portion 10. In an exemplary embodiment of the fuel hose 7, the
first length L1 of the first hose portion is approximately 1,9 meters and the first
diameter D1 of the first hose portion is approximately 25 mm, while the
second length L2 of the second hose portion is approximately 1,3 meters and
the second diameter D2 of the second hose portion is approximately 20 mm.
The skilled person realizes that a number of modifications of the
embodiments described herein are possible without departing from the scope
of the invention, which is defined in the appended claims.
For instance, the first hose portion and the second hose portion may
be integrally formed.
The lengths and diameters of the first and second hose portions may
be varied.
The connection means may be manufactured of any suitable material
and may be of any suitable size and shape.
The number of fuel lines (and the lengths and diameters of the same)
in the fuel hose may be varied.
The fuel hose may be used in a fuel dispensing unit having a hose
handling device. In this case, at least a portion of the fuel hose is housed
within the fuel dispensing unit and the extraction and retraction of the fuel
hose from the fuel dispensing unit is handled by the hose handling device.
Claims (8)
1. A fuel hose (7) for delivering multiple-grades of fuel, comprising a first hose portion (9) having a first length (L1) and a first diameter 5 (D1), and a second hose portion (10) having a second length (L2) and a second diameter (D2), wherein said first hose portion (9) comprises a first fuel line (11) and a second fuel line (12), and said second hose portion (10) comprises a third fuel 10 line (13), said first fuel line (11) and said second fuel line (12) being fluidly connected to said third fuel line (13), characterized in that said first diameter (D1) of said first hose portion (9) is larger than said second diameter (D2) of said second hose portion (10). 15
2. A fuel hose (7) according to claim 1, wherein said first length (L1) of said first hose portion (9) is longer than said second length (L2) of said second hose portion (10).
3. A fuel hose (7) according to claim 1 or 2, wherein said first fuel line 20 (11) is adapted to deliver a fuel of a first grade, said second fuel line (12) is adapted to deliver a fuel of a second grade, and said third fuel line (13) is adapted to deliver a fuel of said first grade, said second grade or a mix of said first grade and said second grade. 25
4. A fuel hose (7) according to any one of the preceding claims, wherein said first fuel line (11) and said second fuel line (12) are coaxially arranged in said first hose portion (9).
5. A fuel hose (7) according to any one of the preceding claims, 30 wherein said fuel hose (7) further comprises a vapour recovery line (14) extending within said first hose portion (9) and said second hose portion (10).
6. A fuel hose (7) according to any one of the preceding claims, wherein said first hose portion (9) substantially extends from a top section of a fuel dispensing unit (1) to a bottom section of said fuel dispensing unit (1), and said second hose portion (10) substantially extends from said bottom 5 section of said fuel dispensing unit (1) to a mid section of said fuel dispensing unit (1).
7. A fuel hose (7) according to any one of the claims 1-5, wherein said first hose portion (9) substantially extends from a mid section of a fuel 10 dispensing unit (1) to a top section of said fuel dispensing unit (1) and from said top section of said fuel dispensing unit (1) to a bottom section of said fuel dispensing unit (1), and said second hose portion (10) substantially extends from said bottom section of said fuel dispensing unit (1) to a mid section of said fuel dispensing unit (1).
8. A fuel hose (7) according to any one of the preceding claims, wherein said first length (L1) of first hose portion (9) constitutes at least
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SESE1451099-4 | 2014-09-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
NZ711536A true NZ711536A (en) |
Family
ID=
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