MULTI-PART HOUSING AND WARNING SYSTEM

Description

BACKGROUND1. Field

[0001] This invention relates to a multifunction enclosure suitable for use on a moving vehicle.2. General Background

[0002] Pressurized cylinders are useful; for storing and transporting fuels such as hydrogen, natural gas (CNG) and propane. Storage of gaseous fuel cylinders / tanks in a tractor or trailer must meet crash safety requirements. Such fuel vessels for part of a fuel supply system requiring valves, connectors, sensors and other balance of plant items. Further, turbulent airflow around a tractor trailer increases the drag coefficient and reduces increasing costs.

[0003] Figures 1 and 2 are an overview of a tractor 10 (cab) and trailer 20 arrangement with a covered or enclosed 30 rack of gaseous fuel tanks 50. Traditional systems of enclosures (30) shroud said gaseous fuel vessels on a vehicle.

[0004] Housings or enclosures both improve laminar airflow during driving. Racks and fuel tanks or vessels have valves, controllers and other balance of plant items which benefit from protection within an enclosure. Such gaseous fuel vessels transported on highways are subject to a plethora of highway regulations which include the need for regular inspections. What is apparent is the large quantity of threaded fasteners 65 are utilized through threaded holes 60 to construct the enclosure. If the enclosure cannot be disassembled without lifting it over the rack and tanks it required additional equipment and is antithetical to the necessary required inspections thereby taking vehicles out of service due to delays in inspecting for safety requirements.

[0005] Each fastener must be fitted into a matching receptacle and each of which must be removed to remove the panels of the shroud or cover. Moreover, after a shroud have been removed to allow inspection of gaseous fuel system the fasteners each have to be reinserted and connected at a predetermined torque level to assure the public that the shroud or part thereof cannot come loose from a vehicle travelling on a highway. Further, should any fasteners by cross fastened or in some way damage the threaded receptacle and / or the fastener may require further inspection to determine the corrective procedure. The above scenario can lead to time delay and costly corrective measures.

[0006] It is therefore a desideratum to provide an secure the gaseous fuel system and balance of plant in an enclosure which reduces at least one of removal and attachment costs and time.

[0007] US2017 / 080798 describes a back of cab enclosure which covers vertically mounted fuel tanks and manages airflow wherein laminar airflow is improved and turbulent airflow is decreased.SUMMARY

[0008] The invention is set out in the appended set of claims Disclosed herein is a system and method to protect an enclosed space with an housing and provided for a simplified removal and attachment process. In the case of gaseous fuel storage or fuel system, the improved enclosure reduces costs, losses and delays. Moreover, it reduces the man hours and physical activity, repetitive motion injury associated with removing hundreds of fasteners necessary to disengage and engage traditional enclosures. Moreover, such fuel tanks are an expensive part of a tractor trailer infrastructure and should be protected from tampering and the environment.

[0009] Disclosed herein are systems, devices and methods of multifunction a lightweight enclosure which covers and protects a three dimensional structure such as a rack, housing, container or rack. In some instance the structure may contain fuel tanks. In some instance the cooperation between assemblies and mounting fixtures on the structure and enclosure simplify engagement and disengagement of the enclosure with the three dimensional structure and / or the vehicle.

[0010] Disclosed herein are aspects of exemplary implementations of devices and systems to enclosure or protect a space which includes a space containing fuel tanks behind a cab of a vehicle including a fuel system. An aspect of the present invention provides an enclosure to protect fuel tanks behind a cab of a vehicle comprising a fuel system, the fuel system comprising a rack, a plurality of catch bracket assemblies attached to the rack, and fuel tanks affixed to the rack. The enclosure comprises a multipart enclosure is formed of a plurality of shells configured to nest onto one another and fit over the structure; a plurality of housing latch assemblies formed on the interior wall surfaces of one of the plurality of shells and configured to mate with a corresponding catch bracket assembly on the rack. Each of the plurality of shells comprises a first end, a second end, a first side, and a second side, and one of a ledge or a leading edge formed around at least a portion of a perimeter (P) of each shell. The latch and catch assemblies releasably affix the enclosure parts to the rack and together without the use of threaded fasteners; and, wherein the leading edge or ledge is configured to cooperate to disperse force along the perimeter where the plurality of shells overlap.

[0011] In some instances each housing latch assembly comprises a bracket attached to the interior wall surface; at least one latching pin is affixed to the bracket; and, a movable coil spring surrounds the latching pin.

[0012] In some instances each catch bracket assembly comprises a catch member attached to the rack having a pin guide corresponding to and configure to receive a corresponding latching pin; an elastomeric stop; and, wherein the elastomeric stop prevents downward movement of the bracket and latching pins beyond a preset threshold. In some instances the system includes at least one movable strap fixture affixed to the exterior of one or more end and side shell; an anchor each have a latching end affixed to the rack or structure and configured to receive the latching end; and, wherein the latch and catch assemblies compress the coil springs when a shell end or side is moved in the "z" axis relative to the rack thereby moving the latching end in a position to mount it with the anchor and affix the enclosure shells to the structure or rack. In some instances one or more positional sensors may be attached to the rack configured to report if the nested shell sides and ends fail to be attached to the structure or rack in a predetermined position. In some instances an activator affixed to the shell end or sides configured to be adjacent to each positional sensors when the enclosure shell ends and sides are attached via the one or more movable strap to the structure or rack. In some instances the sensor is in signal communication with an alert controller to determines if the positional sensor is in a position that requires reporting or an alert. In some instances the alert controller is configured to at least one of disable the operation of a vehicle, set off an alarm inside a vehicle and communicate wirelessly to an application on a computing device remote from the vehicle to alert the vehicle operator or other interested party.

[0013] Disclosed herein are aspects of exemplary implementations of devices and systems to enclosure or protect a space which may include a space containing fuel tanks behind a cab of a vehicle including a fuel system.

[0014] Exemplars may include a three dimensional structure such as a rack within the enclosure having a plurality of catch bracket assemblies attached thereto. In some instances fuel tanks may be affixed to the structure; a multipart enclosure is formed of a plurality of shells configured to nest onto one another and fit over the structure; a plurality of housing latch assemblies formed on the interior wall surfaces of the shells and configured to mate with a corresponding catch bracket assembly on the rack or three dimensional structure ; wherein the latch and catch assemblies releasably affix the enclosure parts to the rack and together without the use of threaded fasteners; and, wherein the nested shells evenly disperse force along the perimeter edges where the shells overlap, the nested shells further comprising a first end, a second end, a first side , and a second side. The system includes a locking means having a lock interface affixed to the structure or rack; an opening in the lock interface configured to accept insertion of a locking plunger; a linearly movable spring actuate plunger within plunger guide affixed to the interior wall surface of a shell configured to mate with the opening; and, wherein the plunger slides into the open of the lock interface when the strap fixture attaches the shell to the structure or rack. In some instances the system includes at least one slider attached to an interior wall surface of an end or side shell; a slider guide attached to the rack configured to receive the slider; and, wherein the slider's tapered head is configured to mate with the slider guide and align the latching pin of the housing latch assembly with a corresponding pin guides thereby of a the catch bracket assembly. In some instances at least one of the slider or the slider guide is elastomeric.

[0015] In an aspect of the present invention, there is provided a method of assembling an enclosure to protect fuel tanks behind a cab of a vehicle comprising a fuel system, the method comprising: providing a rack, attaching a plurality of catch bracket assemblies to the rack, affixing fuel tanks to the rack, and forming the enclosure. Forming the enclosure comprises forming a multipart enclosure from a plurality of shells nested onto one another, wherein each of the plurality of nested shells comprises a first end, a second end, a first side, and a second side, and one of a ledge or leading edge formed around at least a portion of a perimeter (P) of each shell, wherein the leading edge or ledge is configured to cooperate to disperse force along the perimeter (P) where the plurality of shells overlap. The method further comprises fitting the multipart enclosure over the fuel system; and mating a plurality of housing latch assemblies formed on an interior wall surface (IWS) of each of the plurality of nested shells with a corresponding catch bracket assembly on the rack, wherein the latch assemblies and catch bracket assemblies (700) releasably affix the enclosure parts to the rack and together without the use of threaded fasteners.

[0016] In some instances the method includes one or more positional sensors attached to the structure rack configured to report if the releasable enclosure attached to the structure rack is fails to be attached in a predetermined position.DRAWINGS

[0017] The above-mentioned features of the present disclosure will become more apparent with reference to the following description taken in conjunction with the accompanying drawings wherein like reference numerals denote like elements and in which: Figure 1 is a traditional tractor and trailer with an enclosure (prior art) over fuel a rack with fuel cylinders; Figure 2 is a traditional enclosure (prior art) over fuel a rack with fuel cylinders; Figure 3 shows a rack for use with a tractor trailer aerodynamic tank enclosure; Figure 4 shows a rack with tanks for use with a tractor trailer aerodynamic tank enclosure; Figure 5 is an aerodynamic quick release tank enclosure; Figure 6A is a back view of a quick release aerodynamic tank enclosure over a rack of tanks; Figure 6B is a back view of a quick release aerodynamic tank enclosure of Fig. 6A at section "A"; Figure 7A is a top view of a quick release aerodynamic tank enclosure; Figure 7B is a view along arrows "B-B" of Fig. 7A; Figure 7C is a view of section "B" of Fig. 7B. Figure 7D is a view along arrows "C-C" of Fig. 7A; Figure 8A is a disassembled view of a quick release aerodynamic enclosure; Figure 8B is a disassembled view of a quick release aerodynamic enclosure; Figure 8C is a side view of three dimensional structure with quick release features; Figure 9A -9E are views of the guides, latches and catches forming a part of a quick release aerodynamic enclosure assembly method and system; Figure 10A and 10B are views of the guides a plunger safety lock; and, Figure 11A and 11B are views of a safety sensor / alarm.

[0018] As shall be appreciated by those having ordinary skill in the art, the figures are not to scale, and modifications to scale within a figure or across the figures are considered within the present disclosure. All callouts in figures are hereby incorporated by this reference as if fully set forth herein.FURTHER DISCLOSURE

[0019] According to one or more exemplary implementations, as shown in Figures 1- 11B 1-there are disclosed methods, devices and systems of lightweight nested enclosures which eliminate or improve on prior art systems. The multi-part enclosure provides release and connect innovations to at least one of support quicker release, ease of handling , safety, reduced downtime for inspections, easier maintenance of enclosed systems.

[0020] Figures 3 and 4 illustrate a rack 100 system which may be enclosed. Tanks for gaseous fuel 200 may be affixed within the rack. Those of ordinary sill in the art will understand that the rack and gaseous fuel tanks are but one exemplar of what may be enclosed by the multipart housing (or enclosure) and / or alert system .

[0021] Figures 5-7A show exterior view and partial exterior views of the multipart enclosure 400. When utilized with a tractor trailer mobile system the enclosures protects housed items such as fuel tanks and may reduce turbulent airflow around at least one of the tractor and trailer.

[0022] The multipart enclosure 400 is illustrated as being formed of four nested shell components (410, 420, 405A and 405B) . The illustration of four components is not a limitation. A larger or small number of shell components may be nested in accordance with the disclosure and those of ordinary skill in the art will recognize the scope of the disclosure to include such design variations.

[0023] The shell , as illustrated, includes a first end 405A, second end 405B, a first side 410, a second side 420. Each shell component also includes a section "T" of the shell which when nested in an assembled enclosure configuration form a top surface (see figure 7A) "TS". Handles 430 are formed on, or attached to, the second side 420 which provide a gripping surface for removal or attachment. Movable strap fixtures 435 affixed to one of the multipart of the enclosure with an anchor 436 each have a latching end 437 which mates with a catch 438 (see figure 11A) attached to the rack.

[0024] Figures 7A-7D illustrate aspects of the nesting arrangements and closure methods and systems of the aerodynamic lightweight nested enclosures. Figure 7A is a top view of a fully assembled enclosure 400. Figure 7B is a cut-away view taken along the line of arrows "B-B" of Figure 7A. A rack 100 supporting gaseous fuel tanks 200 are within the enclosure. The enclosure is affixed to the rack 100 without fasteners or threaded holes 60 and 61. The elimination of such fasteners eliminates the time consuming task of removing or inserting a large volume of fasteners (see Figures 1 and 2). Moreover, an enclosure that is part of a mobile system is subject to inspection and safety oversite. Specifically, in prior art system a mis threading of a fastener may require corrective action such as re-tapping or over drilling the threaded hole in a rack. Changes such as drilling or retaping may require further inspection and approval thus reducing efficiency and costing time. A failure to attach all fasteners with torque in a nominal range may result in unevenly attached panels which in turn will degrade over time due to uneven stress. Rather, the instant disclosure eliminates threaded fasteners and reduces the disassembly and assembly process by virtue of eliminating the plethora of fasteners.

[0025] Section "B" of Fig. 7B is enlarged in Fig. 7C and Section "C" of Fig. 7B is enlarged in Fig. 7D. The edges of each shell form a perimeter and along at least a portion of the perimeter "P", the shells nest at the ledges and leading edges during assembly the nesting will disperse or distribute force "F" at the perimeter of each shell during attachment of the shells, in a predetermine sequence of shell placement, to the rack as disclosed herein.

[0026] The first side 410 has a first ledge 406 configured to fit beneath the leading edge 407 formed at at least a portion of the perimeter of the second side 420. The first side and second side are positioned over the rack and oriented for proper nesting and assembly via top latch-catch assemblies 450. The assembles have one or more latches support on a bracket 452 which is affixed to the interior wall surface ("IWS") of a top portion of the multipart shell. A spring means, such as a coil spring 454 is held on a latching pin 456 wherein the latching pin is aligned via a catch bracket 500. The catch bracket provides one or more through pin guides 505 which allow entry of the latching pins and whereby the insertion of the latching pin causes the coil spring 454 to compress thereby aligning and holding the enclosure shell portion (side or end) in a predetermined orientation to the rack and other shell components. A elastomeric stop 508 may be added to the catch bracket to limit the depth the latching pin may pass into the alignment guide. The stop can prevent movement beyond a predetermined threshold. Shown in figure 7D is a second ledge 408 formed at at least a portion of the permitter "P" of the first side and configure to fit beneath a leading edge 409 formed at at least a portion of the perimeter of the second end 405B. Each side or end has a perimeter "P" and on each side or end a ledge or leading edge if formed on at least a portion of that perimeter wherein the shells are nested together during assembly.

[0027] Figures 8A and 8B show a exploded multipart enclosure with a rack to be enclosed 100 and a rack holding tanks 200 to be enclosed and aspects of latching, aligning and catching methods and devices. In some instances the rack or three dimensional structure enclosed is affixed or anchored to a vehicle which moves on at least one of land, sea , air and space.

[0028] Sliders 550 are both alignment means and bumpers configured to urge multipart shell components into a predetermined configuration during assembly. Each housing latch assembly 600 are fixed to each of the multipart shell components (405A. 405B, 410 and 420) on the interior wall of the shell and oriented to mate slider guides with catch bracket assembly 700 which are affixed to the rack. Figure 9A shows additional aspects of an exemplar of housing latch assemblies 600 formed on a bracket 601 and Figure 9B shows aspects of a slider 550. Figure 8C shows a side face of a three dimensional structure with quick release features such as catch bracket assembly 700 and slider guides 703 configured to engage with corresponding housing latch assemblies and sliders. Figure 9C shows additional aspects of a catch bracket assembly 700.

[0029] Figures 9A-9C show aspects of an exemplary attachment system for the multipart enclosure. The housing latch assemblies 600 are configured to be affixed to the interior wall surface (IWS) of the first side, second side, first end and second end. At the movable end of the coil spring 455 is a cup washer 602 which limits the movement of the coil spring towards the shaped end 457 of the latching pin 456 . In operation the cup washer sits against the catch member 702 and when the shaped end 457 of the latching pin mates with an pin guide 505 the latching pin moves downward and the spring compresses. The elastomeric stop limits the downward movement of the latching pin relative to the catch bracket 700.

[0030] The catch bracket . Optionally, a structural panel 707 may be added to support the catch member against other parts of the rack 100. A slider guide 703 is illustrated as part of the catch bracket. However, those of ordinary skill in the art will recognize that the slider guide may be separate from the catch bracket and such a change is within the scope of this disclosure.

[0031] The slider guide are configured to accept the insertion and removal of a slider 550. In some instances the slider may be formed of a metal or plastic material . In some instances the slider is formed of a rubber or elastomeric material . In other instance the slider may be a metal material or a material harder than the guide. The sliders function primarily as an alignment fixture. Elastomeric sliders will also act as both shock absorbing bumpers (being of a softer material) for each of the nested shell pieces and for a shock absorption system for all the nested shell components in the attached configuration forming an enclosure. The elastomeric sliders dampen movement and noise. Dampening movement of a lightweight shell will reduce wear that dimmish component life. The slider has a body 560 that is shaped with multiple front flexible lobes 562 and one rear flexible lobe 563 which run axially along its length and a mounting foot 564 is on one side of the slider adjacent to the rear flexible lobe 563 forming a mounting neck 575 therebetween. The slider is attached to the inside of a nested shell component via the mounting foot. A slider head 570 is a shaped portion of the slider (whether metal or a hard material of a softer material) is configured to a taper whereby it allows for some variation from perfect alignment when the nest shell components are moved into the enclosure configuration. The attachment of nest shell components is a blind attachment meaning the operator cannot easily see the latches and catches. Accordingly, the disclosed system provides a softer alignment with the elastomeric sliders. This method of assembly also provides for correction of slightly misaligned part regardless of slider softness or hardness wherein the slider head's smaller diameter provides for greater tolerance to misalignment.

[0032] The slider fits into the slider guide 703. The slider guide is configured and oriented to mate with the slider. In so9em instances the slider guide may be a softer material than the slider and it may act to dampen or absorb shock. In other instances the slider guide may be a harder material than the slider. In soe4m instances the slider and slider guide may be of similar or the same elasticity. It is a channel with a body 704, an open end 706 and a slot 710 which corresponds to the mounting foot neck 565. When the latching pins are within the catch bracket pin guides 505 a nested shell component is properly aligned.Methods of assembly:

[0033] The main aspects of a basic assembly exemplary are the first step of assembling the enclosure by placing the first side 410 on the rack 100 and aligning the latching pins with the pin guides 505 in catch bracket assemblies 700 as described above. That placement provides the first ledge 406 of the frost side in the correct configuration to add the second side. The second side 420is then aligned and added via the catches and latches with its leading edge 407 fitting on top of the first ledge thereby nesting against the first side 410.

[0034] At this stage of the construction the first and second sides may be affixed via latching the movable strap fixtures 435 with catch 438 (see figure 11A) attached to the rack. That attachment may be followed by attachment of the ends as described below.

[0035] Alternatively before latching the first and second sides with strap fixtures the first and second ends 405A and 405B may be placed on the nested structure . The first side and the second side each present a second ledge 408 which is configured to fit under the leading edge 409 of the first and second ends . When aligned and placed on the rack and over the ledges of the first side and second side the first and second ends over lay and contain the second ledges forming the nested structure. The nested structure and ledge-edge arrangement provides for even pressure against the interface between shell components reducing wear and eliminates the need for fasteners with all the previously described problems. Further the nested arrangement eliminates the need to have worker on top of the enclosure to remove fasteners. The nested arrangement eliminate a need for measuring the torque on each threaded fastener. Next the first and second sides are affixed via latching the strap fixtures 435 with catches 438 then the ends are affixed via latching the movable strap fixtures 435 with catches 438 .

[0036] Additionally, to further provide for additional safety shown in figures 10A to 11B are locking and sensing exemplars. If a nested shell component becomes disassociated from the rack or is improperly attached the nested shell components could become disassembled or damaged. A safety option deploys a locking means 800 shown affixed to the catch bracket assembly 700. In one exemplary the locking means is a spring actuate plunger 802 which is held to the catch bracket assembly 700 in a plunger guide 804. The back side 602 of the housing latches is affixed against a nest shell component when assembled. Through the structural panel 707 a lock interface 750 is formed having an opening 775 through which the insertion end 810 of the plunger passes. To operate the plunger 802 an operator grasps and pulls the end of the plunger 815 away from the enclosure and compresses the spring means (not shown) to retract the insertion end 810. The insertion end may be angled whereby the insertion end during construction of the enclosure can travel backwards as the nest shell component is pulled downward during assembly and snap into the lock interface. However, to remove the nested shell component the operator must actively pull the end of the plunger 815. Accordingly the nested shell components are firmly locked in place without any fasteners and removal is simplified via releasing plungers. Yet further, the coil spring of the latch - catch assemblies 450 urge the nested shell component upward when the plungers are released assisting in removal of the nested shell components for disassembly.

[0037] Figures 11A and 118 illustrate an alert sensing system configured to engage when the nested shell is constructed. A sensor 900 which may be magnetic, optical or an electrical connection is mounted on the rack and connected to a alert controller (not shown) whereby the controller may set off an alarm inside a vehicle and hard wired to a second controller or ignition system or computing device within the vehicle. Alternatively, or additionally the alert controller or be in signal communications wirelessly to an application remote from the vehicle such as a computer, tablet or smart phone to alert the operator or other interested party of a loose enclosure. Attached to one or more nested shell components is an activator 902 which completes the or closes the circuit between the sensor and activator. When the circuit is broken the alert or alarm is sent. The alarm may include disabling the ignition system of a vehicle until the loose part is corrected. If the sensor circuit is broken or completed the controller determines if an alert, alarm or other responsive action is required. The failure of the sensor activator to align sufficiently with the sensor will cause the control to recognize an alert or alarm condition which can be logged in a database and / or reported as appropriate or used to disable operation.

[0038] While the method and agent have been described in terms of what are presently considered to be the most practical and preferred implementations, it is to be understood that the present invention is intended to cover various modifications and similar arrangements which fall within the scope of the claims, the scope of which should be accorded the broadest interpretation so as to encompass all such modifications and similar structures. The present invention includes any and all implementations of the following claims.

[0039] It should also be understood that a variety of changes may be made without departing from the scope of the claims.

Claims

1. An enclosure to protect fuel tanks behind a cab of a vehicle comprising a fuel system (5), the fuel system (5) comprising; a rack (100); a plurality of catch bracket assemblies (700) attached to the rack (100); and fuel tanks (200) affixed to the rack (100), the enclosure comprising: a multipart enclosure (400) formed of a plurality of shells configured to nest onto one another and fit over said fuel system (5); and a plurality of housing latch assemblies (600) formed on the interior wall surfaces (IWS) of one of the plurality of shells and configured to mate with a corresponding catch bracket assembly (700) on the rack (100); wherein each of the plurality of nested shells comprises: a first end (405A), a second end (405B), a first side (410), and a second side (420); and one of a ledge (406) or leading edge (407) formed around at least a portion of a perimeter (P) of each shell; wherein the latch assemblies (600) and catch bracket assemblies (700) releasably affix the enclosure parts to the rack (100) and together without the use of threaded fasteners; and wherein the leading edge (406) or ledge (407) is configured to cooperate to disperse force along the perimeter (P) where the plurality of shells overlap.

2. The enclosure of Claim 1, wherein the plurality of nested shells form a top surface (TS).

3. The enclosure of Claim 1, wherein each housing latch assembly (600) comprises a bracket attached to the interior wall surface, the enclosure further comprising: at least one latching pin (456) affixed to the bracket; and a movable coil spring (454) surrounding the latching pin (456).

4. The enclosure of Claim 3, further comprising an elastomeric stop (508), wherein each catch bracket assembly (700) comprises a catch member (702) attached to the rack (100) and comprises a pin guide (505) corresponding to and configured to receive a corresponding latching pin (456); and wherein the elastomeric stop (508) prevents downward movement of the bracket and latching pins (456) beyond a preset threshold.

5. The enclosure of Claim 4, further comprising: at least one movable strap fixture (435) comprising a latching end (437) affixed to the exterior of one or more of the end of a nested shell and the side of the nested shell; and an anchor (436) affixed to the rack (100) and configured to receive the latching end (437); wherein the latch (600) and catch assemblies (700) compress the coil springs (454) when an end or side of one of the plurality of nested shells is moved in the "z" axis relative to the rack (100) thereby moving the latching end (437) in a position to mount the latching end (437) with the anchor (436) and affix the one of the plurality of nested shells of the enclosure to the rack (100).

6. The enclosure of Claim 5, further comprising one or more positional sensors (900) attached to the rack (100) and configured to report if the sides and ends of one of the plurality of nested shells fail to be attached to the rack (100) in a predetermined position.

7. The enclosure of Claim 6, further comprising an activator (902) affixed to the ends or sides of one of the plurality of nested shells configured to be adjacent to each positional sensors (900) when the enclosure ends and sides of one of the plurality of nested shells are attached via one or more movable straps to the rack (100).

8. The enclosure of Claim 6 or 7, wherein the sensor (900) is in signal communication with an alert controller to determine if the positional sensor (900) is in a position that requires reporting or an alert.

9. The enclosure of Claim 8, wherein the alert controller is configured to perform operations including at least one of disabling the operation of a vehicle, setting off an alarm inside a vehicle and communicating wirelessly to an application on a computing device remote from the vehicle to alert the vehicle operator or other interested party.

10. The enclosure of Claim 5 or 8, further comprising: a locking means (800) comprising: a lock interface (750) affixed to the rack (100); an opening (775) in the lock interface configured to accept insertion of a locking plunger; and a linearly movable spring actuate plunger (802) within plunger guide (804) affixed to the interior wall surface of one of the plurality of nested shells configured to mate with the opening (775), wherein the plunger (802) slides into the opening (775) of the lock interface (750) when the strap fixture (435) attaches the one of the plurality of shells to the rack (100).

11. The enclosure of Claim 4, further comprising: at least one slider (550) attached to an interior wall surface of an end or side of one of the plurality of nested shells; and a slider guide (703) attached to the rack (100) and configured to receive the slider (550), wherein a tapered head (570) of the slider (550) is configured to mate with the slider guide (703) and align the latching pin (456) of the housing latch assembly (600) with a corresponding pin guide (505) of the catch bracket assembly (700).

12. The enclosure of Claim 11, wherein at least one of the slider (550) or the slider guide (703) is elastomeric.

13. A method of assembling an enclosure to protect fuel tanks behind a cab of a vehicle comprising a fuel system (5), the method comprising: providing a rack (100) attaching a plurality of catch bracket assemblies (700) to the rack (100); affixing fuel tanks to the rack (100); forming the enclosure, wherein forming the enclosure comprises: forming a multipart enclosure from a plurality of shells nested onto one another, wherein each of the plurality of nested shells comprises: a first end (405A), a second end (405B), a first side (410), and a second side (420); and one of a ledge (406) or leading edge (407) formed around at least a portion of a perimeter (P) of each shell, wherein the leading edge or ledge is configured to cooperate to disperse force along the perimeter (P) where the plurality of shells overlap; fitting the multipart enclosure over the fuel system (5); and mating a plurality of housing latch assemblies (600) formed on an interior wall surface (IWS) of each of the plurality of nested shells with a corresponding catch bracket assembly (700) on the rack (100), wherein the latch assemblies (600) and catch bracket assemblies (700) releasably affix the enclosure parts to the rack (100) and together without the use of threaded fasteners.

14. The method of Claim 13, further comprising forming a top surface (TS) from the plurality of nested shells.

15. The method of Claim 13, further comprising: attaching a bracket to the interior wall surface of each of the plurality of housing latch assemblies (600); providing a latching pin (456) on the enclosure and affixing the at least one latching pin to the bracket; and providing a moveable coil spring (454) to surround the latching pin.