Cng fuel supply system

Details Cng fuel supply system Cng fuel supply system

B - Operations, Transporting

60

K

B60K 15/063 (2006.01) B60K 15/01 (2006.01) B60K 15/07 (2006.01)

Patent

CA 2287396

A CNG fuel supply system is provided for mounting a plurality of Type 4 tanks on the roof of a bus. A manifold line extends to the roof of the bus and is anchored against movement relative to the length of the bus. A shutoff valve is associated with each tank, the shutoff valve being mounted on an end of its respective tank adjacent the manifold line. The shutoff valve has two ports which communicate with the tank when the shutoff valve is open. An inlet tubing piece connects the manifold line to one of the two ports of each tank and an outlet tubing piece connects the manifold line to the other port of each tank. The tubing pieces are manufactured to be substantially identical to other tubing pieces of the tank system for a given bus, and to other tubing pieces for other buses in the fleet, thus reducing the number of different tubing pieces utilized for construction and maintenance of the fleet. The tubing pieces are pre-fabricated machine bent tubing formed to specified tolerances so that at least some of the tubing pieces are interchangeable. Each of the tubing pieces includes a flexible portion for accommodating thermal expansion and contraction with the Type 4 tanks. Each of the tanks is mounted upon the bus so that it can be removed without removing any of the other tanks.

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