| 摘要 |
A system including means and method for proportioning tax to vehicle efficiency-class at the fuel pump, including: provision of mandatory configuration of each vehicle filler neck in accordance with vehicle efficiency-class, coacting fuel-dispensing pump-nozzle structure to ascertain by the filler neck configuration the efficiency-class vehicle being fueled, and coacting pump structure to tax the quantity dispensed in accordance with the efficiency-class ascertained. In embodiment, a locking system for the fuel nozzle is released only by proper engagement with a receiver according to this invention. Stationary power plants and heating systems can be proportionally taxed as well as automotive air and water vehicles by means of the invention.
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