An apparatus and a method are provided for a compressed natural gas fuel system configured to replace a motor vehicle's fuel system comprising a storage assembly comprising an enclosure, wherein the enclosure contains a plurality of tanks configured to contain compressed natural gas; and a chassis disposed within the enclosure and configured to retain the plurality of tanks, wherein the storage assembly is configured to be mounted to the roof of a motor vehicle.

A fabric coated or impregnated with an elastomeric material may include a polyurethane dispersion layer combined with a sealant. The fabric may be applied in such a fashion so as to enable the elimination of solvent or fluid that is associated with the elastomer. The polyurethane dispersion layer generally comprises an elastomeric material dispersed or dissolved in a liquid medium, such as, but not limited to, water. At the same time, the integrity of the elastomeric composite which is formed from the dispersion and sealant layers may be maintained in order to minimize the presence of air voids and pockets. It has thus been realized that in doing so the performance of the self-sealing volume is dramatically improved. This method of construction usually may be accomplished without significantly adding to the weight or thickness of the volume and without affecting the outer dimension of the self-sealing volume.

A method of forming a self-sealing fuel tank includes: providing a container including internal surfaces and external surfaces and configured to hold a fuel; forming a latex coating layer over at least a portion of the internal surfaces and/or external surfaces; depositing or encapsulating an environmental layer over at least a portion of the latex coating layer; where the latex coating layer swells when contacted with the fuel; and where the latex coating layer is formed from a latex coating composition that is substantially free of a non-ionic associative thickener.

A self-sealing liquid bladder having a plurality of layers including a liquid impermeable material layer that is compatible with a liquid held in the bladder and at least one sealing layer that is conformally arranged to span a surface area of the liquid impermeable material layer and that is separated from a liquid held in the bladder by the liquid impermeable layer, the sealing layer including a sealing means that, in response to a penetration of both the liquid impermeable material layer and the sealing layer, substantially seals the penetration.

Typical composite panels are brittle and unable to support transverse pressure loads that might be imposed on the panels. For example, the use of typical panels around fuel tanks of a vehicle are unable to support transverse pressure loads that might be imposed on the fuel tanks during a crash of the vehicle or a ballistic impact to the fuel tanks. In the embodiments described herein, panels include face sheets that are bonded to a foam core. The foam core includes a corrugated core sheet that is formed from a highly ductile material, such as Polyethylene or Aluminum. When a transverse pressure load is imposed on the panel, core crush of the foam occurs as the core sheet elongates from its original corrugated shape to a curve shape during deformation. This allows the panel to dissipate the energy of the transverse pressure load applied to the panel.

A vehicle includes a first rail and a second rail elongated along a vehicle-longitudinal axis and spaced from each other along a vehicle-lateral axis. The vehicle includes an energy storage device between the first rail and the second rail. The vehicle includes a support structure between the first rail and the second rail. The vehicle includes a cable under tension and extending from the first rail to the second rail, the cable between the energy storage device and the support structure.

The use of flexible foam material to provide ignition mitigation in fuel tanks is described. In one example, a system for ignition mitigation includes a number of foam blocks, wherein each foam block is pre-cut from a flexible foam material. Each foam block can have a unique profile corresponding to inner surfaces of a fuel tank at a particular sector within a compartment of the fuel tank. In other aspects, one or more of the foam blocks can include one or more upper cutouts to provide clearance for upper stiffeners in the fuel tank, one or more lower cutouts to provide clearance for lower stiffeners in the fuel tank, and one or more arcuate cutouts to provide clearance for a tank fuel pump. The foam blocks can be arranged in a stack corresponding to a sequential installation at respective sectors within the compartment of the fuel tank.

A liquid storage tank, for example an aircraft fuel tank, having a tank wall enclosing a liquid storage space, and a tie assembly located at least partially within the liquid storage space. The tie assembly includes an elongate member, for example a wire or cable, and a plurality of attachment devices fixed to an inner surface of the tank wall. The elongate member includes a plurality of spaced part points along its length, each of the spaced apart points being fixed to a respective attachment device such that the tie assembly resists outward deformation of the tank wall.

A method of forming a self-sealing fuel tank includes: providing a container including internal surfaces and external surfaces and configured to hold a fuel; forming a latex coating layer over at least a portion of the internal surfaces and/or external surfaces; depositing or encapsulating an environmental layer over at least a portion of the latex coating layer; where the latex coating layer swells when contacted with the fuel; and where the latex coating layer is formed from a latex coating composition that is substantially free of a non-ionic associative thickener.

A method utilizing quantities of flexible foam material inserted into a fuel tank, thereby providing ignition mitigation and minimizing the risk of explosion in the tank. The foam material is sculpted into a few, or a substantial quantity of foam blocks. In large-scale installations, the blocks are labeled according to exact placement within a stacking pattern that replicates the tank interior. The blocks are inserted by technicians through existing access ports until the tank is filled, excepting minimal planned void spaces. The foam material establishes ignition mitigation by acting as an ignition blocker, mechanically interfering with the compression wave created by a flame front in an explosion, and changing the vaporous mixture-above the fuel level in the tank. Upon completion of foam insertion, the fuel tank is filled with purging fluid, drained through a filter until no debris is found, and a new maximum fuel quantity recalibrated.