CONCRETE MIXER VEHICLE HAVING VERTICALLY-POSITIONED CNG FUEL TANKS
A concrete mixer vehicle includes a chassis having a frame member extending in a generally-horizontal direction, an engine, a drum drive transmission coupled to a drum, a drum pedestal having a lower portion coupled to the frame member and an upper portion coupled to the drum drive transmission, and a CNG tank configured to provide fuel to the engine. The CNG tank is positioned in a generally-vertical orientation relative to the frame member. The CNG tank has a length and a width measured along and across the generally-horizontal direction, respectively, and a height measured along a central axis. The height is greater than both the width and the length, and the height and the central axis are disposed in the generally-vertical direction. A lower end of the CNG tank is coupled to the drum pedestal, and an upper end of the CNG tank is coupled to the drum drive transmission.
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This application is a continuation of U.S. patent application Ser. No. 14/635,948, filed Mar. 2, 2015, which claims the benefit of U.S. Provisional Application No. 61/947,079, filed Mar. 3, 2014, both of which are incorporated herein by reference in their entireties.
BACKGROUNDA concrete mixer vehicle is used to transport concrete (e.g., ready mix concrete) from a mixing location (e.g., a concrete batch plant) to a point of use. The concrete mixer vehicle may be a front discharge concrete mixer vehicle or a rear discharge concrete mixer vehicle, which dispense concrete from the front or rear of the vehicle, respectively. An engine is used to move the vehicle, and a fuel system provides fuel to power the engine. Traditionally, the engine combusts diesel fuel to provide an output power. Other concrete mixer vehicles include engines powered by compressed natural gas (CNG). CNG is stored in CNG fuel tanks and provided to the engine to power the vehicle.
SUMMARYOne embodiment relates to a concrete mixer vehicle including a chassis that includes a frame member extending in a generally-horizontal direction, an engine coupled to the chassis, a drum, a drum drive transmission coupled to the drum, a drum pedestal having a lower portion that is coupled to the frame member and an upper portion that is coupled to the drum drive transmission, and a CNG tank coupled to the engine and configured to provide fuel thereto. The CNG tank is positioned in a generally-vertical orientation relative to the frame member. The CNG tank has a length measured along the generally-horizontal direction, a width measured across the generally-horizontal direction, and a height measured along a central axis. The height is greater than the width and greater than the length such that the CNG tank is elongate, the height and the central axis being disposed in the generally-vertical direction. The CNG tank has an upper end and a lower end. The lower end of the CNG tank is coupled to the drum pedestal, and the upper end of the CNG tank is coupled to the drum drive transmission.
Another embodiment relates to a front discharge concrete mixer vehicle including a chassis that includes a frame member extending in a generally-horizontal direction and having a front end and a rear end, a concrete mixing drum having an opening at the front end of the chassis and coupled to the frame member with a front drum pedestal and a rear drum pedestal, a drum drive transmission coupled to the concrete mixing drum and coupled to an upper portion of the rear drum pedestal, an operator cab positioned at the front end of the chassis, an engine positioned at the rear end of the chassis, and a CNG tank coupled to the engine and configured to provide fuel thereto. The CNG tank is positioned in a generally-vertical orientation relative to the frame member. The CNG tank has a length measured along the generally-horizontal direction, a width measured across the generally-horizontal direction, and a height measured along a central axis. The height is greater than the width and greater than the length such that the CNG tank is elongate, the height and the central axis disposed in the generally-vertical direction.
Still another embodiment relates to a method of manufacturing a concrete mixer vehicle. The method includes providing a chassis including a frame member extending in a generally-horizontal direction and having a front end and a rear end, coupling an engine to the chassis, coupling a CNG tank to the engine such that the CNG tank is configured to provide fuel thereto, and positioning the CNG tank in a generally-vertical orientation relative to the frame member. The CNG tank has a length measured along the generally-horizontal direction, a width measured across the generally-horizontal direction, and a height measured along a central axis. The height is greater than the width and greater than the length such that the CNG tank is elongate, the height and the central axis disposed in the generally-vertical direction.
The invention is capable of other embodiments and of being carried out in various ways. Alternative exemplary embodiments relate to other features and combinations of features as may be generally recited in the claims.
The invention will become more fully understood from the following detailed description taken in conjunction with the accompanying drawings wherein like reference numerals refer to like elements, in which:
Before turning to the figures, which illustrate the exemplary embodiments in detail, it should be understood that the application is not limited to the details or methodology set forth in the description or illustrated in the figures. It should also be understood that the terminology is for the purpose of description only and should not be regarded as limiting.
According to an exemplary embodiment, a concrete mixer vehicle includes a pair of CNG fuel tanks positioned in a generally-vertical orientation. The concrete mixer vehicle including CNG fuel tanks positioned in a generally-vertical orientation has a shorter wheelbase than CNG-fueled concrete mixer vehicles having CNG fuel tanks positioned along the length of the chassis or laterally across the length of the chassis. The concrete mixer vehicle having a shorter wheelbase is more maneuverable (e.g., around a jobsite, etc.). By way of example, the concrete mixer vehicle having a shorter wheelbase may have a smaller turning radius than other concrete mixer vehicles. In other embodiments, a CNG fuel system including CNG fuel tanks positioned in a generally-vertical orientation is configured to be provided for use with a concrete mixer vehicle. The concrete mixer vehicle may have a shorter wheelbase (e.g., relative to CNG-fueled concrete mixer vehicles having CNG fuel tanks that are otherwise positioned, etc.). In other embodiments, the concrete mixer vehicle may have a maximum allowable wheelbase (e.g., due to governmental or other regulations, due to customer demands, etc.), where extension of the wheelbase to accommodate CNG fuel tanks that are otherwise positioned is not permitted.
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Drum drive transmission 130 includes a plurality of gears (e.g., a planetary gear reduction set, etc.) configured to increase the turning torque applied to mixing drum 70, according to an exemplary embodiment. The plurality of gears may be disposed within a housing. As shown in
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According to an exemplary embodiment, fuel system 90 includes valves, hoses, regulators, filters, and various other components configured to facilitate providing fuel to engine 62. Such components may be coupled to first CNG tank 150 and second CNG tank 160 with a plurality of CNG connections (e.g., high pressure connections, low pressure connections, etc.). In one embodiment, fuel system 90 includes exactly two CNG storage tanks. Having two CNG storage tanks reduces the number of CNG connections within fuel system 90, thereby reducing the risk of leaking CNG from fuel system 90 to the surrounding environment.
In other embodiments, fuel system 90 includes more than two CNG storage tanks (e.g., three CNG storage tanks, four CNG storage tanks, etc.) or fewer than two CNG storage tanks. The CNG storage tanks may be each positioned in a generally-vertical orientation, or at least one of the CNG storage tanks may be positioned laterally across frame rails 30, according to alternative embodiments. By way of example, two CNG storage tanks may be positioned in a generally-vertical orientation, and a third CNG tank may be positioned laterally across frame rails 30 (e.g., at the upper ends of the two generally-vertical CNG tanks, across the tops of the two generally-vertical CNG tanks, etc.).
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According to an exemplary embodiment, concrete mixer truck 10 having first CNG tank 150 and second CNG tank 160 positioned in a generally-vertical orientation on opposing lateral sides of chassis 20 may have a reduced (i.e., shorter, etc.) wheelbase relative to concrete mixing vehicles having CNG tanks located in other orientations. In one embodiment, first CNG tank 150 and second CNG tank 160 have a circular cross section with a diameter of 26 inches. The longitudinal space claim of first CNG tank 150, second CNG tank 160, and covers 120 may be approximately 30 inches. Accordingly, fuel system 90 has a reduced longitudinal space claim (e.g., an 18 inch reduction in longitudinal space claim, etc.). Concrete mixer truck 10 having a fuel system 90 with a reduced longitudinal space claim has a reduced wheelbase (e.g., 196 inches, etc.), according to an exemplary embodiment. In other embodiments, fuel system 90 having a reduced longitudinal space claim may be implemented on concrete mixer vehicles that have a maximum allowable wheelbase (i.e., those mixer vehicles where extending the wheelbase to accommodate CNG fuel tanks is not an acceptable option, etc.).
In one embodiment, first CNG tank 150 and second CNG tank 160 are elongate. By way of example, first CNG tank 150 and second CNG tank 160 may have lengths that are greater than their widths. In one embodiment, first CNG tank 150 and second CNG tank 160 have a circular cross section with a diameter of 26 inches and a length of 80 inches. First CNG tank 150 and second CNG tank 160 may each have an upper end and a lower end. In one embodiment, first CNG tank 150 and second CNG tank 160 are boss-mounted at the upper ends and the lower ends thereof. The lower ends of first CNG tank 150 and second CNG tank 160 may be fixed, and the upper ends thereof may be mounted with floating joints. Such floating joints may accommodate an extension (i.e., growth, etc.) of the CNG tanks (e.g., 0.375 inches, etc.) that may occur during filling or when the tanks are pressurized. As shown in
According to an exemplary embodiment, fuel system 90, including first CNG tank 150 and second CNG tank 160 positioned in a generally-vertical orientation, includes a first shutoff valve coupled to the lower end of first CNG tank 150 and a second shutoff valve coupled to the lower end of second CNG tank 160. Fuel system 90 having shutoff valves positioned at the lower ends of first CNG tank 150 and second CNG tank 160 facilitates isolation of the CNG tanks by an operator standing alongside concrete mixer truck 10. In other embodiments, a first shutoff valve is coupled to the upper end of first CNG tank 150, and a second shutoff valve is coupled to the upper end of second CNG tank 160. In either position, the shutoff valves may be manually operable (e.g., with a handle, etc.) or electrically actuated (e.g., with a solenoid valve, etc.). By way of example, the shutoff valves may be electrically actuated by an operator standing alongside concrete mixer truck 10 using a control system that includes a button or other user interface.
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As utilized herein, the terms “approximately”, “about”, “substantially”, and similar terms are intended to have a broad meaning in harmony with the common and accepted usage by those of ordinary skill in the art to which the subject matter of this disclosure pertains. It should be understood by those of skill in the art who review this disclosure that these terms are intended to allow a description of certain features described and claimed without restricting the scope of these features to the precise numerical ranges provided. Accordingly, these terms should be interpreted as indicating that insubstantial or inconsequential modifications or alterations of the subject matter described and claimed are considered to be within the scope of the invention as recited in the appended claims.
It should be noted that the term “exemplary” as used herein to describe various embodiments is intended to indicate that such embodiments are possible examples, representations, and/or illustrations of possible embodiments (and such term is not intended to connote that such embodiments are necessarily extraordinary or superlative examples).
The terms “coupled,” “connected,” and the like, as used herein, mean the joining of two members directly or indirectly to one another. Such joining may be stationary (e.g., permanent) or moveable (e.g., removable, releasable, etc.). Such joining may be achieved with the two members or the two members and any additional intermediate members being integrally formed as a single unitary body with one another or with the two members or the two members and any additional intermediate members being attached to one another.
References herein to the positions of elements (e.g., “top,” “bottom,” “above,” “below,” etc.) are merely used to describe the orientation of various elements in the figures. It should be noted that the orientation of various elements may differ according to other exemplary embodiments, and that such variations are intended to be encompassed by the present disclosure.
It is important to note that the construction and arrangement of the elements of the systems and methods as shown in the exemplary embodiments are illustrative only. Although only a few embodiments of the present invention have been described in detail, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited. For example, elements shown as integrally formed may be constructed of multiple parts or elements. It should be noted that the elements and/or assemblies of the components described herein may be constructed from any of a wide variety of materials that provide sufficient strength or durability, in any of a wide variety of colors, textures, and combinations. As another example, the position of elements may be reversed or otherwise varied and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of the disclosure. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. Other substitutions, modifications, changes, and omissions may be made in the design, operating conditions, and arrangement of the preferred and other exemplary embodiments without departing from scope of the present disclosure or from the spirit of the appended claims.
Claims
1. A concrete mixer vehicle, comprising:
- a chassis including a frame member extending in a generally-horizontal direction;
- an engine coupled to the chassis;
- a drum;
- a drum drive transmission coupled to the drum;
- a drum pedestal having a lower portion that is coupled to the frame member and an upper portion that is coupled to the drum drive transmission; and
- a CNG tank coupled to the engine and configured to provide fuel thereto, wherein the CNG tank is positioned in a generally-vertical orientation relative to the frame member, wherein the CNG tank has a length measured along the generally-horizontal direction, a width measured across the generally-horizontal direction, and a height measured along a central axis, wherein the height is greater than the width and greater than the length such that the CNG tank is elongate, the height and the central axis disposed in the generally-vertical direction, wherein the CNG tank has an upper end and a lower end,
- wherein the lower end of the CNG tank is coupled to the drum pedestal, and wherein the upper end of the CNG tank is coupled to the drum drive transmission.
2. The concrete mixer vehicle of claim 1, wherein the upper end of the CNG tank is directly coupled to the drum drive transmission with an intermediate superstructure.
3. The concrete mixer vehicle of claim 1, wherein the lower end of the CNG tank is fixedly coupled to the drum pedestal with a support bracket, wherein the upper end of the CNG tank is coupled to the drum drive transmission with an intermediate superstructure, and wherein the intermediate superstructure is configured to accommodate a change in length of the CNG tank.
4. The concrete mixer vehicle of claim 1, further comprising a second CNG tank coupled to the engine and configured to provide fuel thereto, wherein the second CNG tank is positioned in a generally-vertical orientation relative to the frame member.
5. The concrete mixer vehicle of claim 4, wherein the first CNG tank is positioned on a first lateral side of the chassis and the second CNG tank is positioned on a second lateral side of the chassis.
6. The concrete mixer vehicle of claim 5, wherein the second CNG tank is elongate and has a second upper end and a second lower end, and wherein at least one of: (a) the second lower end of the second CNG tank is directly coupled to the drum pedestal with a support bracket and (b) the second upper end of the second CNG tank is directly coupled to the drum drive transmission with an intermediate superstructure.
7. The concrete mixer vehicle of claim 6, wherein the first CNG tank and the second CNG tank each define a central axis, wherein the central axis of the first CNG tank and the central axis of the second CNG tank are positioned in a generally-vertical orientation relative to the frame member.
8. The concrete mixer vehicle of claim 7, wherein the central axis of the first CNG tank is angularly offset relative to the central axis of the second CNG tank.
9. The concrete mixer vehicle of claim 8, wherein the central axis of the first CNG tank is angularly offset about 15 degrees relative to the central axis of the second CNG tank.
10. The concrete mixer vehicle of claim 8, wherein the drum is a concrete drum having a base portion coupled to the drum drive transmission, wherein the first CNG tank and the second CNG tank are positioned behind the concrete drum.
11. A front discharge concrete mixer vehicle, comprising:
- a chassis including a frame member extending in a generally-horizontal direction and having a front end and a rear end;
- a concrete mixing drum having an opening at the front end of the chassis and coupled to the frame member with a front drum pedestal and a rear drum pedestal;
- a drum drive transmission coupled to the concrete mixing drum and coupled to an upper portion of the rear drum pedestal;
- an operator cab positioned at the front end of the chassis;
- an engine positioned at the rear end of the chassis; and
- a CNG tank coupled to the engine and configured to provide fuel thereto, wherein the CNG tank is positioned in a generally-vertical orientation relative to the frame member, wherein the CNG tank has a length measured along the generally-horizontal direction, a width measured across the generally-horizontal direction, and a height measured along a central axis, and wherein the height is greater than the width and greater than the length such that the CNG tank is elongate, the height and the central axis disposed in the generally-vertical direction.
12. The front discharge concrete mixer vehicle of claim 11, wherein the CNG tank is positioned forward of the engine.
13. The front discharge concrete mixer vehicle of claim 12, wherein the CNG tank is positioned between the engine and a base portion of the concrete mixing drum.
14. The front discharge concrete mixer vehicle of claim 11, wherein the CNG tank has an upper end and a lower end, wherein at least one of:
- the lower end of the CNG tank is directly coupled to the rear drum pedestal with a support bracket; and
- the upper end of the CNG tank is directly coupled to the drum drive transmission with an intermediate superstructure.
15. The front discharge concrete mixer vehicle of claim 14, wherein the support bracket and the intermediate superstructure are disposed in a generally perpendicular orientation relative to the central axis.
16. The front discharge concrete mixer vehicle of claim 11, wherein an upper end of the CNG tank is directly coupled to the drum drive transmission with an intermediate superstructure.
17. The front discharge concrete mixer vehicle of claim 11, wherein a lower end of the CNG tank is fixedly coupled to the rear drum pedestal with a support bracket, wherein an upper end of the CNG tank is coupled to the drum drive transmission with an intermediate superstructure, and wherein the intermediate superstructure is configured to accommodate a change in length of the CNG tank.
18. A method of manufacturing a concrete mixer vehicle, comprising:
- providing a chassis including a frame member extending in a generally-horizontal direction and having a front end and a rear end;
- coupling an engine to the chassis;
- coupling a CNG tank to the engine such that the CNG tank is configured to provide fuel thereto; and
- positioning the CNG tank in a generally-vertical orientation relative to the frame member, wherein the CNG tank has a length measured along the generally-horizontal direction, a width measured across the generally-horizontal direction, and a height measured along a central axis, and wherein the height is greater than the width and greater than the length such that the CNG tank is elongate, the height and the central axis disposed in the generally-vertical direction.
19. The method of claim 18, further comprising:
- coupling a lower portion of a drum pedestal to the frame member and an upper portion of the drum pedestal to a drum drive transmission;
- coupling a drum to the drum drive transmission; and
- at least one of: directly coupling the CNG tank to the drum pedestal with a support bracket; and directly coupling the CNG tank to the drum drive transmission with an intermediate superstructure.
20. The method of claim 19, wherein the support bracket and the intermediate superstructure are disposed in a generally perpendicular orientation relative to the central axis.
Type: Application
Filed: Mar 25, 2019
Publication Date: Jul 18, 2019
Applicant: Oshkosh Corporation (Oshkosh, WI)
Inventors: Mark D. Broker (Neenah, WI), Tim S. Meilahn (Oshkosh, WI), Jon J. Morrow (Neenah, WI)
Application Number: 16/363,458