Method And System For Delivering A Gaseous Fuel Into The Air Intake System Of An Internal Combustion Engine

摘要

A method and system delivers a cryogenically stored fuel in a gaseous state into the air intake system of a gaseous fuelled internal combustion engine. The method involves measuring the pressure in the vapor space of the cryogenic storage vessel, comparing the measured pressure to a required fuel supply pressure and supplying fuel in gaseous state directly from the vapor space of the cryogenic storage vessel to the fuel delivery line that supplies fuel to the engine, when the pressure measured in the vapor space of the cryogenic storage vessel is equal to or higher than the required fuel supply pressure. The method further involves activating a cryogenic pump to deliver fuel to the internal combustion engine from the liquid space of the cryogenic storage vessel when the measured pressure in the vapor space is lower than the required fuel supply pressure.

主权项

1. A method for delivering a fuel in a gaseous state into an air intake system of a gaseous fuelled internal combustion engine, the method comprising:
(a) determining a required fuel supply pressure according to an operating condition of said engine; (b) measuring pressure in a vapor space of a storage vessel which stores said fuel; (c) comparing said measured pressure to said required fuel supply pressure; and either of: (d) supplying said fuel in said gaseous state from said vapor space in said storage vessel when said measured pressure is equal to or higher than said required fuel supply pressure; or (e) activating a fuel pump and delivering fuel from a liquid space in said storage vessel when said measured pressure is lower than said required fuel supply pressure.