Chrysler Improves CNG Tanks With Human Lungs By Jason Siu Nov 12 2013 Share this Article Tweet Chrysler has developed a patent-pending technology that mimics human lungs in order to enhance its CNG tank capacities. Continue Reading... Filed under: American Chrysler Featured Articles Ram TrucksTags: Chrysler, cng, cng tank capacity, cng tanks, Compressed Natural Gas, ram, ram 2500, ram 2500 cng